Compounds similar to hydrocarbons in which a tetravalent silicon atom replaces the carbon atom. They are very reactive, ignite in air, and form useful derivatives.
Saturated indolizines that are fused six and five-membered rings with a nitrogen atom at the ring fusion. They are biosynthesized in PLANTS by cyclization of a LYSINE coupled to ACETYL COENZYME A. Many of them are naturally occurring ALKALOIDS.
Saturated quinolizines that are two fused six-membered rings with a nitrogen atom at the ring fusion. They are biosynthesized in PLANTS by cyclization of a LYSINE coupled to CADAVERINE. Many of them are naturally occurring ALKALOIDS.
The phenomenon whereby compounds whose molecules have the same number and kind of atoms and the same atomic arrangement, but differ in their spatial relationships. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)
The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.
The facilitation of a chemical reaction by material (catalyst) that is not consumed by the reaction.
A dark-gray, metallic element of widespread distribution but occurring in small amounts; atomic number, 22; atomic weight, 47.90; symbol, Ti; specific gravity, 4.5; used for fixation of fractures. (Dorland, 28th ed)
Exclusive legal rights or privileges applied to inventions, plants, etc.
Polymeric materials (usually organic) of large molecular weight which can be shaped by flow. Plastic usually refers to the final product with fillers, plasticizers, pigments, and stabilizers included (versus the resin, the homogeneous polymeric starting material). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Inorganic compounds that contain silicon as an integral part of the molecule.
A trace element that constitutes about 27.6% of the earth's crust in the form of SILICON DIOXIDE. It does not occur free in nature. Silicon has the atomic symbol Si, atomic number 14, and atomic weight [28.084; 28.086].
Organic compounds that contain silicon as an integral part of the molecule.
Abnormal responses to sunlight or artificial light due to extreme reactivity of light-absorbing molecules in tissues. It refers almost exclusively to skin photosensitivity, including sunburn, reactions due to repeated prolonged exposure in the absence of photosensitizing factors, and reactions requiring photosensitizing factors such as photosensitizing agents and certain diseases. With restricted reference to skin tissue, it does not include photosensitivity of the eye to light, as in photophobia or photosensitive epilepsy.
The application of technology to the solution of medical problems.
The flow of water in enviromental bodies of water such as rivers, oceans, water supplies, aquariums, etc. It includes currents, tides, and waves.
Degree of saltiness, which is largely the OSMOLAR CONCENTRATION of SODIUM CHLORIDE plus any other SALTS present. It is an ecological factor of considerable importance, influencing the types of organisms that live in an ENVIRONMENT.
Chromatography on thin layers of adsorbents rather than in columns. The adsorbent can be alumina, silica gel, silicates, charcoals, or cellulose. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Colloids with a solid continuous phase and liquid as the dispersed phase; gels may be unstable when, due to temperature or other cause, the solid phase liquefies; the resulting colloid is called a sol.
Implantable fracture fixation devices attached to bone fragments with screws to bridge the fracture gap and shield the fracture site from stress as bone heals. (UMDNS, 1999)
Apparatus, devices, or supplies intended for one-time or temporary use.
The area between the EPIPHYSIS and the DIAPHYSIS within which bone growth occurs.
The faculty of expressing the amusing, clever, or comical or the keen perception and cleverly apt expression of connections between ideas that awaken amusement and pleasure. (From Random House Unabridged Dictionary, 2d ed)
A viral encephalitis caused by the St. Louis encephalitis virus (ENCEPHALITIS VIRUS, ST. LOUIS), a FLAVIVIRUS. It is transmitted to humans and other vertebrates primarily by mosquitoes of the genus CULEX. The primary animal vectors are wild birds and the disorder is endemic to the midwestern and southeastern United States. Infections may be limited to an influenza-like illness or present as an ASEPTIC MENINGITIS or ENCEPHALITIS. Clinical manifestations of the encephalitic presentation may include SEIZURES, lethargy, MYOCLONUS, focal neurologic signs, COMA, and DEATH. (From Adams et al., Principles of Neurology, 6th ed, p750)
The gradual destruction of a metal or alloy due to oxidation or action of a chemical agent. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Electropositive chemical elements characterized by ductility, malleability, luster, and conductance of heat and electricity. They can replace the hydrogen of an acid and form bases with hydroxyl radicals. (Grant & Hackh's Chemical Dictionary, 5th ed)
A tissue preparation technique that involves the injecting of plastic (acrylates) into blood vessels or other hollow viscera and treating the tissue with a caustic substance. This results in a negative copy or a solid replica of the enclosed space of the tissue that is ready for viewing under a scanning electron microscope.
Alloys that contain a high percentage of gold. They are used in restorative or prosthetic dentistry.
A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions for use in restorative or prosthetic dentistry.
The external elements and conditions which surround, influence, and affect the life and development of an organism or population.
The unconsolidated mineral or organic matter on the surface of the earth that serves as a natural medium for the growth of land plants.
Planet that is the third in order from the sun. It is one of the four inner or terrestrial planets of the SOLAR SYSTEM.
The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.
The presence of bacteria, viruses, and fungi in the soil. This term is not restricted to pathogenic organisms.
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
Elimination of ENVIRONMENTAL POLLUTANTS; PESTICIDES and other waste using living organisms, usually involving intervention of environmental or sanitation engineers.
A substance, extract, or preparation for diffusing or imparting an agreeable or attractive smell, especially a fluid containing fragrant natural oils extracted from flowers, woods, etc., or similar synthetic oils. (Random House Unabridged Dictionary, 2d ed)
The process of cleaving a chemical compound by the addition of a molecule of water.
A clear, colorless liquid rapidly absorbed from the gastrointestinal tract and distributed throughout the body. It has bactericidal activity and is used often as a topical disinfectant. It is widely used as a solvent and preservative in pharmaceutical preparations as well as serving as the primary ingredient in ALCOHOLIC BEVERAGES.
Works about lists of drugs or collections of recipes, formulas, and prescriptions for the compounding of medicinal preparations. Formularies differ from PHARMACOPOEIAS in that they are less complete, lacking full descriptions of the drugs, their formulations, analytic composition, chemical properties, etc. In hospitals, formularies list all drugs commonly stocked in the hospital pharmacy.
Hydrofluoric acid. A solution of hydrogen fluoride in water. It is a colorless fuming liquid which can cause painful burns.
Derivatives of ammonium compounds, NH4+ Y-, in which all four of the hydrogens bonded to nitrogen have been replaced with hydrocarbyl groups. These are distinguished from IMINES which are RN=CR2.
A mixture of alkylbenzyldimethylammonium compounds. It is a bactericidal quaternary ammonium detergent used topically in medicaments, deodorants, mouthwashes, as a surgical antiseptic, and as a as preservative and emulsifier in drugs and cosmetics.
Substances used on inanimate objects that destroy harmful microorganisms or inhibit their activity. Disinfectants are classed as complete, destroying SPORES as well as vegetative forms of microorganisms, or incomplete, destroying only vegetative forms of the organisms. They are distinguished from ANTISEPTICS, which are local anti-infective agents used on humans and other animals. (From Hawley's Condensed Chemical Dictionary, 11th ed)
Rare cutaneous eruption characterized by extensive KERATINOCYTE apoptosis resulting in skin detachment with mucosal involvement. It is often provoked by the use of drugs (e.g., antibiotics and anticonvulsants) or associated with PNEUMONIA, MYCOPLASMA. It is considered a continuum of Toxic Epidermal Necrolysis.
Inorganic compounds that contain iodine as an integral part of the molecule.
Cationic bactericidal surfactant used as a topical antiseptic for skin, wounds, mucous membranes, instruments, etc.; and also as a component in mouthwash and lozenges.

Comparative evaluation of two density gradient preparations for sperm separation for medically assisted conception. (1/455)

To evaluate and optimize the sperm separation efficiency of a novel silane-coated silica bead (Puresperm), serial studies were carried out to compare the various sperm parameters between: (i) three-layer (90%-70%-40%) Puresperm and three-layer (90%-70%-40%) conventional polyvinylpyrrolidone (PVP)-coated silica bead (Percoll) gradients; (ii) three-layer (90%-70%-40%) and two-layer (90%-45%) Puresperm gradients and separately the same for Percoll; and (iii) large (3.0 ml) and small (0.75 ml) semen loading volumes on three-layer Puresperm gradients. Normozoospermic semen samples were treated and analysed in 12 replicates for each experiment. Manual evaluation of concentration, percentage motility, percentage vitality, percentage normal morphology; computer-assisted semen analysis evaluation of concentration, percentage motility, grade of motility, motion characteristics (curvilinear velocity, linearity, amplitude of lateral head velocity, beat cross frequency, percentage hyperactivation); and yields from the initial semen samples were compared. Percoll was found to be superior to Puresperm in concentration, percentage motility, percentage vitality and yields after three-layer density gradient centrifugation. There were no significant differences in sperm parameters between two- and three-layer Percoll gradients, but three-layer Puresperm gradients behaved significantly better than two-layer gradients. Large semen volume loads on three-layer Puresperm gradients resulted in greater sperm concentrations, percentage motility, percentage vitality and percentage normal morphology, but small semen volume loads produced greater yields of good-quality spermatozoa. In the light of Percoll being withdrawn from the shelf for the use of assisted reproduction because of the presence of PVP, three-layer Puresperm gradients with large semen loading volumes appear to be an attractive alternative for sperm separation in medically assisted conception.  (+info)

Cationic silanes stabilize intermediates in DNA condensation. (2/455)

In vitro condensation of DNA has been widely studied to gain insight into the mechanisms of DNA compaction in biological systems such as chromosomes and phage heads and has been used to produce nanostructured particles with novel material and functional properties. Here we report on the condensation of DNA in aqueous solutions by cationic silanes, which combine the condensing properties of polyamines with the cross-linking chemistry of silanes. DNA can be reversibly condensed into classical toroidal and rod-shaped structures with these agents. At low silane concentrations DNA forms a variety of looped structures with well-defined characteristics, including flower- and sausage-shaped forms. These structures suggest that at low silane concentrations a DNA-DNA contact in which the strands are at very large angles to each other is stabilized. Changes in these structures observed as a function of silane concentration suggest possible pathways for the formation of toroids and rods.  (+info)

Factors affecting the shear bond strength of orthodontic brackets to porcelain. (3/455)

The aim of this investigation was to establish a regime for orthodontic bonding to feldspathic porcelain, which ensures adequate bond strength (6-8 MPa) with minimal damage on debond and consisted of an ex vivo investigation measuring the effects of porcelain surface preparation and thermocycling on shear bond strength of orthodontic brackets. One-hundred-and-twenty feldspathic porcelain bonded crown surfaces were divided into 12 equally-sized groups to assess the effects of: (1) glaze removal, (2) application of hydrofluoric acid, phosphoric acid, or omission of acid treatment, and (3) silane priming upon the bond strength of premolar brackets bonded with Right-on (TM) composite resin adhesive. Specimens were subjected to thermocycling and then to shear debonding forces on an Instron machine. Removal of the porcelain glaze, or use of hydrofluoric acid, prior to bonding were found to be unnecessary to secure the target bond strength. Hydrofluoric acid application was associated with increased porcelain surface damage. Thermocycling caused a significant reduction in shear bond strength to porcelain (P < 0*001). The best regime for orthodontic bonding to feldspathic porcelain was to apply phosphoric acid for 60 seconds, and prime with silane prior to bonding. Usually the porcelain surfaces could be repolished. Refereed Paper  (+info)

Relationships among cell attachment, spreading, cytoskeletal organization, and migration rate for anchorage-dependent cells on model surfaces. (4/455)

Many research and commercial applications use a synthetic substrate which is seeded with cells in a serum-containing medium. The surface properties of the material influence the composition of the adsorbed protein layer, which subsequently regulates a variety of cell behaviors such as attachment, spreading, proliferation, migration, and differentiation. In this study, we examined the relationships among cell attachment, spreading, cytoskeletal organization, and migration rate for MC3T3-E1 osteoblasts on glass surfaces modified with -SO(x), -NH(2), -N(+)(CH(3))(3), -SH, and -CH(3) terminal silanes. We also studied the relationship between cell spread area and migration rate for a variety of anchorage-dependent cell types on a model polymeric biomaterial, poly(acrylonitrile-vinylchloride). Our results indicated that MC3T3-E1 osteoblast behavior was surface chemistry dependent, and varied with individual functional groups rather than general surface properties such as wettability. In addition, cell migration rate was inversely related to cell spread area for MC3T3-E1 osteoblasts on a variety of silane-modified surfaces as well as for different anchorage-dependent cell types on a model polymeric biomaterial. Furthermore, the data revealed significant differences in migration rate among different cell types on a common polymeric substrate, suggesting that cell type-specific differences must be considered when using, selecting, or designing a substrate for research and therapeutic applications.  (+info)

The use of silane-coated silica particles for density gradient centrifugation in in-vitro fertilization. (5/455)

Silane-coated silica particles (PureSperm) were evaluated as an alternative to Percoll for gradient separation of spermatozoa, for use in assisted reproduction. Recovery of motile and morphologically normal spermatozoa after using a four-layer Percoll and a two- and four-layer PureSperm gradient respectively was recorded. In-vitro fertilization (IVF) results after using PureSperm for the sperm preparation were also evaluated. No difference in sperm recovery or sperm motility was found when comparing the use of Percoll and the four-layer gradient of PureSperm. When using a two-layer PureSperm gradient, motility was significantly decreased (P < 0.05) compared to Percoll. Normal sperm morphology increased from 8-17.2% after using Percoll and to 12.7% and 11.4% after using a four-layer and a two-layer PureSperm gradient respectively. All gradient preparations showed a significant decrease in the teratozoospermia index compared to the ejaculate (P < 0.01). No significant differences in IVF results regarding fertilization and pregnancy rates were found when PureSperm or the swim-up technique were used for the sperm preparation. PureSperm seems to be an acceptable alternative to Percoll but although the percentage of sperm recovery was higher after PureSperm we still recommend the swim-up technique to be the first choice, as a higher percentage of progressive motile spermatozoa is obtained without using other chemicals than IVF culture medium.  (+info)

Photodynamic therapy with the phthalocyanine photosensitizer Pc 4 of SW480 human colon cancer xenografts in athymic mice. (6/455)

Photodynamic therapy (PDT) using the silicon phthalocyanine photosensitizer Pc 4 [HOSiPcOSi(CH3)2(CH2)3N-(CH3)2] is an oxidative stress associated with induction of apoptosis in various cell types. We assessed the effectiveness of Pc 4-PDT on SW480 colon cancer xenografts grown in athymic nude mice. Animals bearing xenografts were treated with 1 mg/kg body weight Pc 4 and 48 h later were irradiated with 150 J/cm2 672-nm light from a diode laser delivered at 150 mW/cm2. Biochemical studies were performed in xenografts resected at various time points up to 26 h after Pc 4-PDT treatment, whereas tumor size was evaluated over a 4-week period in parallel experiments. In the tumors resected for biochemical studies, apoptosis was visualized by activation of caspase-9 and caspase-3 and a gradual increase in the cleavage of the nuclear enzyme poly(ADP-ribose) polymerase (PARP) to a maximum of approximately 60% of the total PARP present at approximately 26 h. At that time all Pc 4-PDT-treated tumors had regressed significantly. Two signaling responses that have previously been shown to be associated with Pc 4-PDT-induced apoptosis in cultured cells, p38 mitogen-activated protein kinase and p21/WAF1/Cip1, were examined. A marked increase in phosphorylation of p38 was observed within 1 h after Pc 4-PDT without changes in levels of the p38 protein. Levels of p21 were not altered in the xenografts in correspondence with the presence of mutant p53 in SW480 cells. Evaluation of tumor size showed that tumor growth resumed after a delay of 9-15 days. Our results suggest that: (a) Pc 4-PDT is effective in the treatment of SW480 human colon cancer xenografts independent of p53 status; (b) PARP cleavage may be mediated by caspase-9 and caspase-3 activation in the Pc 4-PDT-treated tumors; and (c) p38 phosphorylation may be a trigger of apoptosis in response to PDT in vivo in this tumor model.  (+info)

Silanized nucleic acids: a general platform for DNA immobilization. (7/455)

We have developed a method for simultaneous deposition and covalent cross-linking of oligonucleotide or PCR products on unmodified glass surfaces. By covalently conjugating an active silyl moiety onto oligonucleotides or cDNA in solutions we have generated a new class of modified nucleic acids, namely silanized nucleic acids. Such silanized molecules can be immobilized instantly onto glass surfaces after manual or automated deposition. This method provides a simple and rapid, yet very efficient, solution to the immobilization of prefabricated oligonucleotides and DNA for chip production.  (+info)

Tethered polymer-supported planar lipid bilayers for reconstitution of integral membrane proteins: silane-polyethyleneglycol-lipid as a cushion and covalent linker. (8/455)

There is increasing interest in supported membranes as models of biological membranes and as a physiological matrix for studying the structure and function of membrane proteins and receptors. A common problem of protein-lipid bilayers that are directly supported on a hydrophilic substrate is nonphysiological interactions of integral membrane proteins with the solid support to the extent that they will not diffuse in the plane of the membrane. To alleviate some of these problems we have developed a new tethered polymer-supported planar lipid bilayer system, which permitted us to reconstitute integral membrane proteins in a laterally mobile form. We have supported lipid bilayers on a newly designed polyethyleneglycol cushion, which provided a soft support and, for increased stability, covalent linkage of the membranes to the supporting quartz or glass substrates. The formation and morphology of the bilayers were followed by total internal reflection and epifluorescence microscopy, and the lateral diffusion of the lipids and proteins in the bilayer was monitored by fluorescence recovery after photobleaching. Uniform bilayers with high lateral lipid diffusion coefficients (0.8-1.2 x 10(-8) cm(2)/s) were observed when the polymer concentration was kept slightly below the mushroom-to-brush transition. Cytochrome b(5) and annexin V were used as first test proteins in this system. When reconstituted in supported bilayers that were directly supported on quartz, both proteins were largely immobile with mobile fractions < 25%. However, two populations of laterally mobile proteins were observed in the polymer-supported bilayers. Approximately 25% of cytochrome b(5) diffused with a diffusion coefficient of approximately 1 x 10(-8) cm(2)/s, and 50-60% diffused with a diffusion coefficient of approximately 2 x 10(-10) cm(2)/s. Similarly, one-third of annexin V diffused with a diffusion coefficient of approximately 3 x 10(-9) cm(2)/s, and two-thirds diffused with a diffusion coefficient of approximately 4 x 10(-10) cm(2)/s. A model for the interaction of these proteins with the underlying polymer is discussed.  (+info)

The reports includes global 3-aminopropyltriethoxysilane market drivers, challanges, constraints, opportunities, investment potential, leading technologies, future guidelines, 3-aminopropyltriethoxysilane industry player profile, regulatory ecosystem and plans. The report also delivers market size forecasts for 3-aminopropyltriethoxysilane market. The forecasts are further mentioned in the top segment of 3-aminopropyltriethoxysilane market. This report lists out some of the major key trends that are expected to influence the overall 3-aminopropyltriethoxysilane market development and also presents market statistics to study predominant market trends. In this report, 3-aminopropyltriethoxysilane market is segmented on the basis of application, type, end use and regions. In addition, the report presents detailed information regarding major revenue generating regions of 3-aminopropyltriethoxysilane market.. The report profiles some of the major players in present in 3-aminopropyltriethoxysilane ...
Barcelona/Mexico DF, March, 20 2018. Archivel Farma, owner of RUTI®, the most promising therapeutic vaccine targeting tuberculosis, among the dozen RUTI® related projects that are currently being developed around the world, and Laboratorios Silanes, one of the major Mexican pharmaceutical companies, have signed a collaboration agreement for the clinical development and commercialization of the vaccine in Mexico.. Under that agreement, Archivel Farma will continue managing the Clinical Development Plan for RUTI® providing Silanes with access to the essential confidential information as well as the Scientific Advisory Committee. Silanes, in turn, will advise Archivel Farma with regard to the regulatory affairs and the recommended clinical development of the vaccine in Mexico and will also evaluate the commercial potential of RUTI® in the Mexican market. The agreement grants Laboratorios Silanes a preferential position in obtaining the licence and distribution rights (L&DA) for RUTI® in ...
Trimethoxysilane 2487-90-3 MSDS report, Trimethoxysilane MSDS safety technical specifications search, Trimethoxysilane safety information specifications ect.
The Select Silanes column is a stabilized trifluoropropyl-methyl polysiloxane phase optimized for silanes determination. The Select Silanes column has...
0015]Alkoxysilane used in the preparation method according to the present invention is not particularly limited, but includes at least one selected from a group consisting of: 3-glycidoxypropyl trimethoxysilane; 3-glycidoxypropyl triethoxysilane; 2-(3,4-epoxycyclohexyl)ethyl trimethoxysilane; 2-(3,4-epoxycyclohexyl)ethyl triethoxysilane; methyltrimethoxysilane; methyltriethoxysilane; methyltripropoxysilane; propylethyltrimethoxysilane; ethyltriethoxysilane; vinyltrimethoxysilane; vinyltriethoxysilane; vinyltripropoxysilane; phenyl trimethoxysilane; N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyl triethoxysilane; N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyl trimethoxysilane; N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyl tripropoxysilane; 3-acryloxypropylmethyl bis(trimethoxy)silane; 3-acryloxypropyl trimethoxysilane; 3-acryloxypropyl triethoxysilane; 3-acryloxypropyl tripropoxysilane; 3-(meth)acryloxypropyl trimethoxysilane, 3-(meth)acryloxypropyl triethoxysilane; 3-(meth)acryloxypropyl ...
It is well known that rubber silanes are used as coupling agents which are necessary to achieve a high degree of reinforcement in silica-filled rubber compounds. The silanes establish not only a covalent link between the silica particle and the rubber matrix, but also improve compound
Krahn Chemie and Nanjing SiSiB Silicones Co. Ltd. have concluded into a sales and distribution agreement for organofunctional silanes in Europe. Silanes because of their chemical structure allow bondin
The hydrolysis and dynamics of silane coupling agents have been probed using nuclear magnetic resonance (NMR) spectroscopy. The hydrolysis of γ-aminopropyltrimethoxysilane and γ-aminopropyltriethoxysilane were studied using proton NMR spectroscopy. The rates of hydrolysis were dependent on the water and silane coupling agent concentration as well as their chemical nature. The methoxy-substituted silane hydrolyzed much faster than the ethoxy-substituted one. The molecular motion of γ-aminopropylsilane-d2 immobilized on a silica surface and as the bulk polymerized siloxane were characterized by 2H solid-echo NMR techniques. It was found that the motion of the silane coupling agent on silica was more restricted than in the condensed polymer. Deuterium oxide exchange experiments also showed that the motion of deuterons on the amino group is much faster than those of the deuterons on the methylene group in silane coupling agents. © 1990.
BIS(2-HYDROXYETHYL)-3-AMINOPROPYLTRIETHOXYSILANE 7538-44-5 NMR spectrum, BIS(2-HYDROXYETHYL)-3-AMINOPROPYLTRIETHOXYSILANE H-NMR spectral analysis, BIS(2-HYDROXYETHYL)-3-AMINOPROPYLTRIETHOXYSILANE C-NMR spectral analysis ect.
Silanes are used in a variety of industrial applications as crosslinkers, coupling agents, adhesion promoters, surface treatment and as moisture scavengers.
This research project examines the transport of ions through porous alumina membranes with channels of ̃200 nanometers in diameter. The test molecule is the permeate anion 1,5-naphthalene disulfonate (NDS2-), which as absorbance in the ultraviolet range and also exhibits fluorescence. This allows direct examination of transport by utilizing ultraviolet-visible spectroscopy as well as fluorescence spectroscopy. Adding substituents through strong alumina-silane linkages further modifies all the surfaces of the alumina nanotube membranes. Membranes are soaked in solutions containing either octadecyl trimethoxysilane (ODTMS) or isobutyl trimethoxysilane (IBTMS). Ion transport across the membrane treated with the hydrophobic octadecyl trimethoxysilane was hindered significantly, while the membranes exposed to a short alkyl chain isobutyl trimethoxysilane demonstrated only a slight blockage of ion transport. In both cases, addition of an ionic surfactant dodecyl benzenesulfonate (DBS) and also cationic drug
Aldrich-440302; [3-(2-Aminoethylamino)propyl]trimethoxysilane technical grade, |=80%; CAS No.: 1760-24-3; Synonyms: Dow Corning(R) product Z-6020; N-(2-Aminoethyl)-3-(trimethoxysilyl)propylamine; Linear Formula: (CH3O)3Si(CH2)3NHCH2CH2NH2; Empirical Formula: C8H22N2O3Si; available at Sigma-Aldrich.
2530-87-2 - OXYZDRAJMHGSMW-UHFFFAOYSA-N - (3-Chloropropyl)trimethoxysilane - Similar structures search, synonyms, formulas, resource links, and other chemical information.
Oriented polyester films primer coated in-line with a hydrolyzed aminosilane are disclosed. These silanes in the unhydrolyzed state have the formula: XSi(R.sup.2).sub.a (R.sup.3).sub.b wherein X is a radical selected from the group consisting of H2 NR1 HNR1 --H2 NR1 HNR1 HNR1 --; the R1 s are the same or different groups selected from the group consisting of C1 to C8 alkyl or phenyl; R2 is a hydrolyzable group selected from the group consisting of C1 to C8 alkoxy, an acetoxy group or a halide; R3 is a nonreactive, nonhydrolyzable group selected from the group consisting of C1 to C3 alkyl or phenyl; (a) is an integer ranging from 1 to 3; (b) is an integer ranging from 0 to 2, with the sum of (a) and (b) being 3. The hydrolyzed aminosilane is applied to the film in-line as an aqueous solution at any suitable stage during manufacture of the film, i.e., before, during, or after the stretching operation, but prior to heat setting the film. The resultant primed polyester film is found to exhibit excellent
TY - JOUR. T1 - Dendrimeric silanes for formation of metallosilicates. T2 - New heterogeneous catalysts for the epoxidation of alkenes with tert-butylhydroperoxide. AU - Juwiler, David. AU - Neumann, Ronny. PY - 2001/4. Y1 - 2001/4. N2 - New metallosilicate catalysts were prepared by reacting a silanol capped dendrimer, Si[CH2CH2Si(CH3)2OH]4 with MCp2Cl2 (M = TiIV, MoVI, WVI and VV). The resulting Si[CH2CH2Si(CH3)2OMCp 2Cl]4 compounds were incorporated in a silica matrix by the sol-gel method. The catalytic activity of the metallosilicates after calcination revealed excellent activity and selectivity towards epoxidation of alkenes with tert-butylhydroperoxide. Maximum activity was observed with molybdenum-containing materials. Analysis of the catalytic activity revealed that the catalysts were truly heterogeneous.. AB - New metallosilicate catalysts were prepared by reacting a silanol capped dendrimer, Si[CH2CH2Si(CH3)2OH]4 with MCp2Cl2 (M = TiIV, MoVI, WVI and VV). The resulting ...
Reed and wheat straw particleboards bonded with urea formaldehyde (UF) resin were manufactured from two different material configurations (i.e., fine and coarse particles). The board densities were in the range of 0.550-.90g/cm3. The effects of particle size and board density on the board properties were examined. The properties of particleboard produced from fine particles were better than those made from coarse particles. An increase in board density resulted in a corresponding improvement in the board properties. The properties of OF bonded reed and wheat straw particleboards were relatively lower than those of commercial particleboards. Three silane coupling agents were used to improve the bondability between the reed and wheat particles and OF resin. Results of this study indicate that all the board properties were improved by the addition of silane coupling agent. The degree of improvement achieved from each coupling agent was different; epoxide silane was found to be more effective for reed straw
A method of preventing corrosion of metals using bis-functional polysulfur silanes. The method includes providing a metal surface, and applying a treatment solution onto the metal surface. The treatment solution includes at least one hydrolyzed bis-functional polysulfur silane of the formula: ##STR1## wherein each R is an alkyl or an acetyl group, and Z is either --Sx or --Q--Sx --Q--, wherein each Q is an aliphatic or aromatic group, and x is an integer of from 2 to 9. A treatment solution and metal surface having improved corrosion resistance are also provided.
Electrophilic Reactions of Aryl- and Heteroaryl(triniethyl)silanes with a Remarkable Nucleophilic Catalysis Angewandte Chemie International Edition in English Wiley 0570-0833 1521-3773 10.1002/ANIE.198102651
There are no reliable short-term data available for decachlorotetrasilane (CAS 13465-77-5), therefore good quality data for appropriate structural analogues, trimethoxysilane (CAS 2487-90-3) and tetraethyl orthosilicate (CAS 78-10-4), have been read across. All substances share the same silanol hydrolysis product, monosilicic acid. The other hydrolysis products are hydrogen chloride for decachlorotetrasilane, methanol for trimethoxysilane and ethanol for tetraethyl orthosilicate. A 72-h EC50 value of ,100 mg/l (nominal) (highest concentration tested) and NOEC of ,6.3 mg/l (nominal) have been determined for the effects of trimethoxysilane (CAS 2487-90-3) on growth rate and biomass of Pseudokirchneriella subcapitata. In view of the test media preparation method/exposure regime it is likely that the test organisms were exposed predominantly to the hydrolysis products of the tested substance. The results may be expressed in terms of concentration of the hydrolysis product, monosilicic acid, by ...
TY - JOUR. T1 - Anti-Markovnikov terminal and gem-olefin hydrosilylation using a κ 4 -diimine nickel catalyst. T2 - selectivity for alkene hydrosilylation over ether C-O bond cleavage. AU - Rock, Christopher L.. AU - Trovitch, Ryan. PY - 2019/1/1. Y1 - 2019/1/1. N2 - The phosphine-substituted α-diimine Ni precursor, ( Ph 2 PPr DI)Ni, has been found to catalyze alkene hydrosilylation in the presence of Ph 2 SiH 2 with turnover frequencies of up to 124 h −1 at 25 °C (990 h −1 at 60 °C). Moreover, the selective hydrosilylation of allylic and vinylic ethers has been demonstrated, even though ( Ph 2 PPr DI)Ni is known to catalyze allyl ester C-O bond hydrosilylation. At 70 °C, this catalyst has been found to mediate the hydrosilylation of ten different gem-olefins, with turnover numbers of up to 740 under neat conditions. Prior and current mechanistic observations suggest that alkene hydrosilylation takes place though a Chalk-Harrod mechanism following phosphine donor dissociation. AB - The ...
TY - JOUR. T1 - Diethyl sulfide stabilization of platinum-complex catalysts for hydrosilylation of olefins. AU - Downing, Christopher M.. AU - Kung, Harold H.. PY - 2011/7/1. Y1 - 2011/7/1. N2 - Addition of excess diethylsulfide to the Karstedt catalyst prevents agglomeration of Pt and results in higher reaction rates for hydrosilylation of olefins. The beneficial effects were very pronounced in the hydrosilylation of trimethylsilyl-4-pentenoate with tetrakis(dimethylsilylethyl)silane, where 57% yield was obtained compared with 10% without diethylsulfide. Enhanced activity was also observed in the hydrosilylation of tetravinylsilane, vinyltrimethylsilane, and 1-hexene with chlorodimethylsilane.. AB - Addition of excess diethylsulfide to the Karstedt catalyst prevents agglomeration of Pt and results in higher reaction rates for hydrosilylation of olefins. The beneficial effects were very pronounced in the hydrosilylation of trimethylsilyl-4-pentenoate with tetrakis(dimethylsilylethyl)silane, ...
Treatment of the complex Mo(NO)Cl3(NCMe)2 with the large bite angle diphosphine, 2,2′-bis(diphenylphosphino)diphenylether (DPEphos) afforded the dinuclear species [Mo(NO)(P∩P)Cl2]2[μCl]2 (P∩P = DPEphos = (Ph2PC6H4)2O (1). 1 could be reduced in the presence of Zn and MeCN to the cationic complex [Mo(NO)(P∩P)(NCMe)3]+[Zn2Cl6]2-1/2 (2). In a metathetical reaction the [Zn2Cl6]2-1/2 counteranion was replaced with NaBArF4 (BArF4 = [B{3,5-(CF3)2C6H3}4]) to obtain the [BArF4]− salt [Mo(NO)(P∩P)(NCMe)3]+[BArF4]− (3). 3 was found to catalyze hydrosilylations of various para substituted benzaldehydes, cyclohexanecarboxaldehyde, 2-thiophenecarboxaldehyde, and 2-furfural at 120 °C. A screening of silanes revealed primary and secondary aromatic silanes to be most effective in the catalytic hydrosilylation with 3. Also ketones could be hydrosilylated at room temperature using 3 and PhMeSiH2. A maximum turnover frequency (TOF) of 3.2 × 104 h-1 at 120 °C and a TOF of 4400 h-1 was obtained at ...
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Free Online Library: Silane coupling agent effect on the fatigue life of suspension bushing compounds.(Tech Service) by Rubber World; Business Chemicals, plastics and rubber
Melting point: -50°. Boiling point: 195-197°. Flash point: 78°(172°F). Density: 1.077. Refractive Index: 1.4200. Sensitivity: Moisture Sensitive. Store: Room temperature. Free Shipping within the Continental USA. ...
Cell Density Cell densities in the 31, 63, 130, 250, 500 and 1000 mg a.i./L treatment levels averaged 83, 136, 137, 89, 11 and 0 x 10E4 cells/mL, respectively. Statistical analysis based on Williams Test determined a significant reduction in cell density in all treatment level tested as compared to the pooled control. Based on Williams Test the NOEC was determined to be ,31 mg a.i./L. Additional statistical analysis (Bonferronis Test) determined a significant reduction in cell density in the 31, 250, 500 and 1000 mg a.i./L treatments. The effect on the 31 mg a.i./L treatment level is not considered treatment-related since the two higher concentrations (63 and 130 mg a.i./L) were not affected and were less than 10% inhibited. Therefore, the NOEC was determined to be 130 mg a.i./L. The 96 hour EC50 for cell density was calculated to be 260 mg a.i./L, with 95% confidence intervals of 190 and 360 mg a.i./L. Biomass Biomass in the 31, 63, 130, 250, 500 and 1000 mg a.i./L treatment levels averaged ...
The CSV is a delimited data format that has fields/columns separated by the semicolon character and records/rows separated by newlines. Fields that may contain a special character (semicolon, newline, or double quote), are enclosed in double quotes. For an easier handling, the list of Pre-registered substances is available in four parts ordered by EC number. They contain the same information as the following full list.. ...
Interactive 3D chemistry animations of reaction mechanisms and 3D models of chemical structures for students studying University courses and advanced school chemistry hosted by University of Liverpool
The chloro and azido complexes trans-[PdCl(4-C5NF4)(PiPr(3))(2)] ( 3) and trans-[Pd(N-3)(4-C5NF4)(PiPr(3))(2)] ( 4) can be prepared by reaction of [PdF(4-C5NF4)(PiPr(3))(2)] ( 2) with Et3SiCl or MeSiN3, respectively. In contrast, reactions of 2 with Ph3SiH or Me2FSiSiFMe2 give the products of reductive elimination 2,3,5,6-tetrafluoropyridine ( 5) or 4-(fluorodimethylsilyl) tetrafluoropyridine ( 6) as well as [Pd(PiPr(3))(2)] ( 1). In a catalytic experiment, pentafluoropyridine can be converted with Ph3SiH into 5 in 62% yield, when 10% of 2 is employed as catalyst. Treatment of trans-[PdF(4-C5NF4)(PiPr(3))(2)] ( 2) with Bu3SnCH=CH2 in THF at 50 degrees C results in the formation of [Pd(PiPr(3))(2)] ( 1) and 4- vinyltetrafluoropyridine ( 7). Complex 2 is also active as a catalyst towards a Stille cross-coupling reaction of pentafluoropyridine with Bu3SnCH= CH2 to give 4-vinyltetrafluoropyridine ( 7) with a TON of 6. The molecular structure of the complex 3 has been determined by X-ray ...
TY - JOUR. T1 - Homogeneous gold-catalyzed hydrosilylation of aldehydes. AU - Lantos, Diána. AU - Contel, María. AU - Sanz, Sergio. AU - Bodor, A.. AU - Horváth, I.. PY - 2007/4/1. Y1 - 2007/4/1. N2 - The catalytic hydrosilylation of aldehydes in the presence of PBu3 modified Au(I)-complexes was investigated. In situ IR and NMR experiments have revealed that both, the ligand PBu3 and the substrate aldehyde play an important role in stabilizing the gold catalyst and/or forming the catalytically active species. In their absence the reducing power of silane destabilizes the gold (I) catalyst giving rise to gold clusters or particles. Several side reactions involving water and oxygen were also investigated. A plausible reaction pathway as an alternative to the well-accepted mechanism for the transition-metal homogeneously catalyzed hydrosilylation of aldehydes has been proposed to accommodate the experimental observations.. AB - The catalytic hydrosilylation of aldehydes in the presence of PBu3 ...
As co-catalysts in the Ziegler-Natta polymerization of propylene, donor silanes are important contributors to the chemical genesis. of polypropylene. WACKER® silanes are used in the production of polypropylene by olefin polymerization, to control stereospecificity.
A comparative survey of published work on the reactions of organic derivatives of the Group IVB elements has been made, and the function of these elements in such reactions is discussed. The influence of the trimethylsilyl- and trimethyl- -germyl- substituents on the strengths of some carboxylic acids indicates that the inductive electron-releasing effect is slightly greater, and steric effects consider- -ably less, in the latter group. The alkaline cleavage of numerous tetra-organo- -silanes, -germanes, and -stannanes has been examined. The absolute and relative rates vary widely with the constitution of the compounds, but the germanes are generally much less reactive than the silanes, which are rather less reactive than the stannanes. The tetraorgano-stannanes are often less reactive than might be anticipated. The results are interpreted in terms of decreasing availability of the vacant d-orbitals for transition- state stabilisation as we descend Group IVB. The trimethylaralkyl-germanes and ...
Experimental data on the chronic toxicity of 1,2-Ethanediamine, N-{3-(trimethoxysilyl)propyl}-,N-{(ethenylphenyl)methyl}derivate,hydrochlorides (CAS 171869-89-9) towards freshwater fish are not available. Therefore, in accordance with the Regulation (EC) No. 1907/2006 Annex XI, 1.5 Grouping of substances and read across and the read across assessment framework (RAAF, ECHA 2017) a read across from the analogue substance reaction mass containing six benzylated amine silanes (EC 700-961-2) has been performed. Details on the read-across justification can be found in the attached justification in the respective target entry and in the overall justification for grouping of substances attached in IUCLID Section 13. The study (2004) testing the long term toxicity of reaction mass containing six benzylated amine silanes (EC 700-961-2) to fish was conducted according to OECD guidance 215 using Oncorhynchus mykiss as the test organism. The test item degrades fast in water into oligomeric and polymeric ...
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Silanes was born on November 4, 1943 as a medical prescription laboratory. Today is a solid company that has evolved according to the requirements of quality and innovation maintaining a tradition of trust and commitment to its various stakeholders, such as doctors and members of the health sector, employees, customers, partners, researchers, suppliers, authorities, etc., with the motivation of the world every day to provide better solutions to health.. We are an innovative company that set aside 10% of our sales to research and development, patents and generators being agreements academia-industry collaboration. Aware of the challenges imposed on us by an increasingly globalized world, we seek to expand our coverage to other countries by forming strategic alliances with companies in the industry with the launch of a subsidiary in Spain that allows us to generate innovative projects in other continents.. The Instituto Bioclon is a subusidiary company of Silanes and came about as a result of this ...
Silanes was born on November 4, 1943 as a medical prescription laboratory. Today is a solid company that has evolved according to the requirements of quality and innovation maintaining a tradition of trust and commitment to its various stakeholders, such as doctors and members of the health sector, employees, customers, partners, researchers, suppliers, authorities, etc., with the motivation of the world every day to provide better solutions to health.. We are an innovative company that set aside 10% of our sales to research and development, patents and generators being agreements academia-industry collaboration. Aware of the challenges imposed on us by an increasingly globalized world, we seek to expand our coverage to other countries by forming strategic alliances with companies in the industry with the launch of a subsidiary in Spain that allows us to generate innovative projects in other continents.. The Instituto Bioclon is a subusidiary company of Silanes and came about as a result of this ...
Malodip-AT is mainly associated with symptoms and indications-The International Classification of Diseases (ICD)- C07FB03-Atenolol and othe.... ...
Surface modification of argon-plasma-pretreated poly(tetrafluoroethylene) (PTFE) film via UV-induced graft copolymerization with glycidyl methacrylate (GMA) was carried out first. Reactive adsorption of γ-aminopropyltriethoxysilane (APS) onto the GMA graft-copolymerized PTFE (GMA-g-PTFE) film surface was performed by the simple immersion of the film in the APS solution. The adsorption process was studied as a function of the APS concentration, the immersion time of the graft-modified PTFE film in the APS solution, and the washing protocol. The chemical composition and morphology of the silane-modified surfaces were characterized by X-ray photoelectron spectroscopy and atomic force microscopy, respectively. The performance of the silane-modified PTFE surface in adhesion promotion was investigated. The T-peel adhesion strength of the evaporated Cu on the PTFE film with the reactively adsorbed organosilane increased significantly to about 12.15 N/cm. This adhesion strength was more than twice that ...
Urea (multi)-(meth)acrylate (multi)-silane precursor compounds, synthesized by reaction of (meth)acrylated materials having isocyanate functionality with aminosilane compounds, either neat or in a solvent, and optionally with a catalyst, such as a tin compound, to accelerate the reaction. Also described are articles including a substrate, a base (co)polymer layer on a major surface of the substrate, an oxide layer on the base (co)polymer layer; and a protective (co)polymer layer on the oxide layer, the protective (co)polymer layer including the reaction product of at least one urea (multi)-(meth)acrylate (multi)-silane precursor compound synthesized by reaction of (meth)acrylated materials having isocyanate functionality with aminosilane compounds. The substrate may be a (co)polymer film or an electronic device such as an organic light emitting device, electrophoretic light emitting device, liquid crystal display, thin film transistor, or combination thereof. Methods of making the urea (multi)-(meth
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http://www.kemi.se/lagar_eng/pdf/app5_8.pdf. Soil dissipation. The Meeting reviewed the final report of a 3-year soil dissipation study (4 applications per year) for which an interim report was reviewed by the 1989 JMPR. It confirms the 1989 observations that over 92% of the radioactivity is confined to the top 8 cm of soil over the test period, and that the predominant residues in this segment are flusilazole and its silanol metabolite IN-F7321. The author cites statistical evaluation of the data to support the view that residues will reach a steady level at 57% of yearly application levels after repeated application levels under worst-case conditions. The report cites the steady-state conclusion, the strong adsorption to the top layers of soil, the lack of residues exceeding 0.01 mg/kg in the 24-36 cm soil depths and the weak leaching potential indicated in other studies as evidence that residues in ground water were unlikely. While the data indicate that over 92% of the radioactivity remains ...
Poly(silyl silanes) have been prepared. They have high photosensitivity and excellent resistance to oxygen-reactive ion etching processes. They are useful as photodepolymerizable photoresists, barrier layers, etc.
Sol-gel entrapped lipases gained an increasing attention in the last years, as biocatalysts for several practical applications. In this study, lipases from Candida antarctica B (C-Lecta) has been immobilized by sol-gel entrapment using binary and ternary silane precursor systems containing vinyl-trimethoxysilane. The presence of vinyl functional groups in the sol-gel matrix could be important for specific applications that need further functionalization of the sol-gel matrix. The obtained enzymatic preparates were used as biocatalysts for kinetic resolution of racemic 2-hexanol and 2-octanol, by acylation with vinyl acetate in n-hexane medium. The immobilization resulted in high activity and enantioselectivity values. ...
An aromatic composition comprises aromatic substances that are encapsulated and/or clathrated in a matrix of polymer. The polymer includes an inorganic polymer produced from metal alkoxides; a conjugated polymer produced from metal alkoxides and silane coupling agents; and a conjugated polymer produced from metal alkoxides, silane coupling agents, and organic monomers. The aromatic composition has slow-release characteristics, so that the aromatic substances are released over a long period of time. In a method for the production of the aromatic composition, a catalyst for sol-gel methods that comprises an acid or its anhydride and an organic base, and if necessary, irradiation with ultraviolet light and/or an electron beam are used for making the polymer.
Coating compositions and methods for applying reactive silanol coating compositions having electron deficient surfaces when cured wherein organic radical groups from the silanes are forced to the surface of the coating. The interpenetrating silicon-oxygen structure below the surface skews the electron cloud downward creating a net positively charged surface which is hydrophobic and oleophobic to repel contaminants by discouraging light hydrogen bonding. The surface is also extremely tight and thereby absent nutrients for microorganisms, discourages organic growth. These unique qualities provide cleanliness solutions for automotive and marine applications, including substrates subjected to elevated temperatures typically destructive to organic coatings (paints). Substrate examples are: brakes to repel brake dust on wheels; coating of engines and engine accessories, high-temperature exhausts/stacks/eductors, and engine compartments; automotive, architectural, industrial, and marine exterior
A ligand component is formed according to formula (1 ):R 1 2P-X-N=C(R2)-Y, wherein R1 is Ph or Cyc or a C1-C20 substituted or unsubstituted ailkyl group; each Ph is a substituted or unsubstituted phenyl group; each Cyc is a substituted or unsubstituted cycloalkyl group; X is an unsubstituted arylene or a C2-C3 substituted or unsubstituted alkylene; R2 is H, methyl or Ph; and Y is pyridyl,6-phenylpyridyl or 6-methylpyridyl; with the proviso that when X is a C2 substituted or unsubstituted alkylene and Y is pyridyl, R2 is methyl or Ph. A reaction product including the ligand component and a metal precursor is prepared by combining the ligand component with the metal precursor. An activated reaction product is formed by activating the reaction product as a hydrosilylation catalyst.
Self-assembled monolayers (SAM) of organic molecules are molecular assemblies formed spontaneously on surfaces by adsorption and are organized into more or less large ordered domains. In some cases molecules that form the monolayer do not interact strongly with the substrate. This is the case for instance of the two-dimensional supramolecular networks of e.g. Perylenetetracarboxylic dianhydride (PTCDA) on gold or of e.g. porphyrins on highly oriented pyrolitic graphite (HOPG). In other cases the molecules possess a head group that has a strong affinity to the substrate and anchors the molecule to it. Such a SAM consisting of a head group, tail and functional end group is depicted in Figure 1. Common head groups include thiols, silanes, phosphonates, etc. SAMs are created by the chemisorption of head groups onto a substrate from either the vapor or liquid phase followed by a slow organization of tail groups. Initially, at small molecular density on the surface, adsorbate molecules form either ...
X-ray Photoelectron Spectroscopy Study Of Adsorption Of (3-mercaptopropyl)trimethoxysilane And N-propyltriethoxysilane On A Rutile TiO2(110) Surface
TY - JOUR. T1 - The use of glass substrates with bi-functional silanes for designing micropatterned cell-secreted cytokine immunoassays. AU - Seo, Jeong Hyun. AU - Chen, Li Jung. AU - Verkhoturov, Stanislav V.. AU - Schweikert, Emile A.. AU - Revzin, Alexander. N1 - Funding Information: The authors would like to thank Profs. Marcu and Louie for use of fluorescence microscopy equipment. The authors also thank Drs. Jun Yan and Yinghua Sun for helpful discussions. This work was supported by NSF grants: EFRI 0937997 awarded to AR and CHE 0750377 awarded to EAS. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.. PY - 2011/8. Y1 - 2011/8. N2 - It is often desirable to sequester cells in specific locations on the surface and to integrate sensing elements next to the cells. In the present study, surfaces were fabricated so as to position cytokine sensing domains inside non-fouling poly(ethylene glycol) (PEG) hydrogel microwells. Our aim was to increase sensitivity of micropatterned cytokine ...
Supporting Information Sunlight-driven Synthesis of -Diketones via Oxidative Coupling of Enamines with Silyl Enol Ethers Catalyzed by [Ru(bpy) 3] 2+ ... Other enamines were prepared according to the literature procedures.2 Silyl enol ether 2a was purchased from TCI. B Watsona and Douglas Hayesb aDepartment of Pure and Applied Chemistry, WESTChem, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, Scotland, UK GlaxoSmithKline, Medicines Research Centre, Gunnels b Wood Road, Stevenage, Hertfordshire, SG1 2NY, UK. The Mukaiyama aldol addition is an organic reaction and a type of aldol reaction between a silyl enol ether and an aldehyde or formate. The wanted silyl enol ether 22 was obtained in 93 % yield as 1 : 1 mixture of the diastereoisomers containing only 4 % of the unwanted silyl enol ether 21 as side product. Enol silyl ethers and their analogs are one of the most versatile substrate classes and enjoy widespread applications in organic synthesis (Fig. The protocol provides ...
TY - JOUR. T1 - Hydrosilylation of alkynes catalysed by platinum on titania. AU - Alonso, Francisco. AU - Buitrago, Robison. AU - Moglie, Yanina. AU - Ruiz-Martínez, Javier. AU - Sepúlveda-Escribano, Antonio. AU - Yus, Miguel. N1 - Generated from Scopus record by KAUST IRTS on 2019-08-08. PY - 2011/1/1. Y1 - 2011/1/1. N2 - The heterogeneous hydrosilylation of alkynes catalysed by platinum on titania is reported. A variety of hydrosilanes react with both terminal and internal alkynes to furnish the corresponding vinyl silanes in high yields and short reaction times as well as in a regio- and stereoselective manner. The catalyst can be easily recovered and reused in several consecutive cycles. © 2010 Elsevier B.V. All rights reserved.. AB - The heterogeneous hydrosilylation of alkynes catalysed by platinum on titania is reported. A variety of hydrosilanes react with both terminal and internal alkynes to furnish the corresponding vinyl silanes in high yields and short reaction times as well as ...
3-Tributylstannylsulfolene (1) undergoes palladium-catalyzed cross-coupling reactions with aryl and vinyl halides, cyclohex-1-enyl triflates and acyl chlorides in moderate to excellent yield, thereby allowing rapid entry to a diverse range of 3-substituted sulfolenes, species known to be reliable precursors to 3-substituted 1,3-dienes.. ...
TY - JOUR. T1 - Synthesis of silyloxy dienes by silylene transfer to divinyl ketones. T2 - Application to the asymmetric synthesis of substituted cyclohexanes. AU - Ventocilla, Christian C.. AU - Woerpel, Keith. PY - 2012/4/6. Y1 - 2012/4/6. N2 - Silver-catalyzed silylene transfer to divinyl ketones provided 2-silyloxy-1,3-dienes with control of stereochemistry and regioselectivity. The products participated in Diels-Alder reactions with electron-deficient alkenes and imines to form six-membered-ring products diastereoselectively. Cycloaddition reactions with alkenes bearing chiral auxiliaries provided access to chiral, nonracemic cyclohexenes. The methodology, therefore, represents a synthesis of diastereomerically and enantiomerically pure products in a single flask. The highly substituted cyclohexene products could be functionalized stereoselectively to provide cyclohexanols after oxidation of the carbon-silicon bond.. AB - Silver-catalyzed silylene transfer to divinyl ketones provided ...
Catalytic hydrosilylation of C=C bonds in alkenes in the presence of Ru(II)-phosphine complexes takes place only for alkoxy-substituted silanes in the absence of solvent and in the presence of small amounts of O-2. The activation effect of trace O-2, noted previously for rhodium and other transition metal phosphine complex catalysts for several catalytic processes, has been little studied to date. In this work, oxygen is considered to cause removal of phosphine as its oxide, formation of intermediate dioxygen complexes (followed by oxygenation of Ru-Si= to an Ru-O-Si= moiety with elimination of disiloxane) and possible formation of Ru(IV) species. The studies include the characterization of isolated intermediates (well defined complexes or their mixtures) from an RuCl2(PPh(3))(3)-HSi(OC2H5)(3) system and general mechanisms for the hydrosilylation of alkenes in the presence of Ru(II) precursors are discussed.. ...
Tributyltin hydride is the reagent of the choice for the reduction of functional groups after a radical mechanism. But organotin compounds are toxic and can sometimes only be separated laboriously from nonpolar reaction products. It was necessary to find new reagents which made the adaption of these radical methods possible in (pharmaceutical) production, without having fear of toxic impurities.. Silanes are often an alternative. But the Si-H - bond in silanes is relatively strong compared to the appropriate bond in tributyltin hydride. The discoveries gained from the 80s, that replacement of alkyl by silyl groups weakens the Si-H bond at the central silicon atom, were very important for the discovery of tris(trimethylsilyl)silane as reducing agent. (bond strengths: Bu3Sn-H 74 kcal/mol, Et3Si-H 90 kcal/mol, TMS3Si-H 79 kcal/mol).. ...
A uniaxial natural fabric of Hildegardia populifolia was treated with 5% sodium hydroxide solution for 1 h, and the resulting changes were analyzed by polarized and scanning electron microscopic techniques. The untreated and treated H. populifolia fabric was reinforced in epoxy and toughened with 10% polycarbonate. The variation of the flexural strength and flexural modulus with different fabric contents and fiber orienrations was studied. The effect of sodium hydroxide and a silane coupling agent on the flexural properties of the composite was also studied. It was observed that the flexural properties increased on alkali treatment and when the coupling agent was used. The morphology of the cryogenically fractured surfaces indicated good bonding between the matrix and the reinforcement when a coupling agent was used. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 1297-1302, 2006 ...
TY - JOUR. T1 - The Co2(CO)8-catalyzed hydrosilylation of oxygen-containing olefins. T2 - Silylmetalation as a key step. AU - Chatani, Naoto. AU - Kodama, Tamotsu. AU - Kajikawa, Yasuteru. AU - Murakami, Hidetatsu. AU - Kakiuchi, Fumitoshi. AU - Ikeda, Shin Ichi. AU - Murai, Shinji. PY - 2000. Y1 - 2000. N2 - The hydrosilylation of oxygen-containing olefins in the presence of Co2(CO)8 was carried out. The Co2(CO)8-catalyzed hydrosilylation of allyl acetate with HSiEt2Me is consistent with proceeding via a silylmetalation mechanism rather than a classical hydrometalation (Chalk-Harrod mechanism).. AB - The hydrosilylation of oxygen-containing olefins in the presence of Co2(CO)8 was carried out. The Co2(CO)8-catalyzed hydrosilylation of allyl acetate with HSiEt2Me is consistent with proceeding via a silylmetalation mechanism rather than a classical hydrometalation (Chalk-Harrod mechanism).. UR - http://www.scopus.com/inward/record.url?scp=0034340807&partnerID=8YFLogxK. UR - ...
Biopolymers are easily denatured by heating, a change in pH or chemical substances when they are immobilized on a substrate. To prevent denaturation of biopolymers, we developed a method to trap a polynucleotide on a substrate by hydrogen bonding using silica particles with surfaces modified by aminoalkyl chains ([A-AM silane]/SiO2). [A-AM silane]/SiO2 was synthesized by silane coupling reaction of N-2-(aminoethyl)-3-aminopropyltrimethoxysilane (A-AM silane) with SiO2 particles with a diameter of 5 μm at 100 °C for 20 min. The surface chemical structure of [A-AM silane]/SiO2 was characterized by Fourier transform infrared spectroscopy and molecular orbital calculations. The surface of the silica particles was modified with A-AM silane and primary amine groups were formed. [A-AM silane]/SiO2 was trapped with single-stranded nucleic acids [(Poly-X; X = A (adenine), G (guanine) and C (cytosine)] in PBS solution at 37 °C for 1 h. The single-stranded nucleic acids were trapped on the surface of the [A-AM
The design of novel protein-nanoparticle hybrid systems has applications in many fields of science ranging from biomedicine, catalysis, water treatment, etc. The main barrier in devising such tool is lack of adequate information or poor understanding of protein-ligand chemistry. Here, we establish a new strategy based on computational modeling for protein and precursor linkers that can decorate the nanoparticles. Moringa oleifera (MO2.1) seed protein that has coagulation and antimicrobial properties was used. Superparamagnetic nanoparticles (SPION) with precursor ligands were used for the protein-ligand interaction studies. The molecular docking studies reveal that there are two binding sites, one is located at the core binding site; tetraethoxysilane (TEOS) or 3-aminopropyl trimethoxysilane (APTES) binds to this site while the other one is located at the side chain residues where trisodium citrate (TSC) or Si-60 binds to this site. The protein-ligand distance profile analysis explains the ...
To find an alternative adsorbent with high adsorption performance, KIT-6 was prepared by hydrothermal crystallization synthesis using tetraethyl orthosilicate as a silicon source and triblock copolymer P123 as a template. Then the silane coupling agent (3-chloropropyl)trimethoxysilane was first grafted onto KIT-6 mesoporous material and then the polyethyleneimine (PEI) was further grafted through ...
Abstract. The use of the Xantphos ligand in a mild palladium-catalyzed Kumada-Corriu reaction of secondary benzylic bromides with aryl and alkenyl Grignard reagents minimizes the undesired β-elimination pathway. The corresponding cross-coupling products can be isolated in good yields with inversion of the configuration.. ...
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Silane coupling agents are commonly employed to link an organic polymer to an inorganic substrate. One of the widely utilized coupling agents is 3-aminopropyltriethoxy silane (APTES). In this study, the authors investigated the ability of APTES to retain thermo-responsive poly(N-isopropylacrylamide) (pNIPAAm) on hydroxylated surfaces such as glass. For comparison purposes, the authors also evaluated the retention behaviors of (1) polystyrene, which likely has weaker van der Waals interactions and acid-base interactions (contributed by hydrogen-bonding) with APTES, on APTES as well as (2) pNIPAAm on two other silane coupling agents, which have similar structures to APTES, but exhibit less interaction with pNIPAAm. Under our processing conditions, the stronger interactions, particularly hydrogen bonding, between pNIPAAm and APTES were found to contribute substantially to the retention of pNIPAAm on the APTES modified surface, especially on the cured APTES layer when the interpenetration was ...
Summary of Facts and Submissions. I. This appeal is from the Opposition Divisions decision to revoke European patent No. 0 748 359 relating to [i]mproved processibility and lacing resistance when silanized pigments are incorporated in polymers.. II. The patent as granted contained 40 claims of which, inter alia, the independent claims 1, 2 and 10 read as follows:. 1. A polymer matrix comprising polymer and about 0.01 to about 87% by weight silanized TiO2 pigment, based on the weight of the polymer matrix, exhibiting enhanced processibility, wherein the silanized TiO2 pigment has a coating of about 0.1 to about 5% by weight, based on the weight of the silanized TiO2, of at least one organosilicon compound having the formula. RxSi(R)4-x. wherein. R is a nonhydrolyzable aliphatic, cycloaliphatic or aromatic group having 8-20 carbon atoms;. R is a hydrolyzable group selected from alkoxy, halogen, acetoxy or hydroxy or mixtures thereof; and. x = 1 to 3.. 2. A polymer matrix comprising polymer ...
PUBLICATIONS 1. Coleman, JW, Silane MF, Muecke EC: Experimental obstructive uropathy in fetal rabbits. Investigative Urology 9:335-338, January 1972. 2. Silane MF, Smychych PS: Necrotizing enterocolitis after cardiac surgery: A local ischemic lesion? Amer J Surg 133, No. 3, 373-376m March 1977. 3. Minick ER, Litrenta MM, Alonso DR, Silane MF and Stemerman MB: Effect of regenerated endothelium on intimal lipid accumulation. Fed Proc 36:392, 1977. 4. Minick ER, Litrenta MM, Alonso DR, Silane MF and Stemerman MB: Regenerated endothelium and intimal proteo-glycan accumulation. Circulation, Part II, Vol 56, No 4, Supp. III:144, 1977. 5. Minick, ER, Lirenta MM, Alonso DR, Silane MF and Stemerman MB: Further studies on the effect of regenerated endothelium on intimal lipid accumulation. Progress in Biochem Pharm 13:115-122, 1977. 6. Stoney RJ, Silane MF, Salvatierra O: Ex vivo renal artery reconstruction. Arch Surg 113:1272-1278, November 1978. 7. Lindon JN, Brier-Russell D, Silane MF, Smith M, LaBarre ...
Fabrication of biosensors and microarrays, and more generally of an inorganic device coupled to a biomolecule, has its main issue in bioconjugation, i.e. the immobilization of a working biological probe onto a solid surface. Bioconjugation represents a current challenge crossing both material sciences and biomedical applications [1-3]. Lots of chemical protocols have been reported in the literature in order to passivate and functionalize surfaces: the immobilization of biological species should not prevent their functions, and thus should also ensure their correct organization and orientation. The standard example in this field is gold functionalization by self-assembled monolayer, which gives an appropriate distance from the support surface and a strong binding to biomolecules. In the case of semiconductors and their related materials (oxides, nitrides and their porous formulae), it is not so straightforward to find a common route of functionalization: in particular, on silicon and silicon ...
Alumina platelet reinforced epoxy matrix composites with an architecture resembling to natural nacre were fabricated by a hybrid conventional method called Hot-press Assisted Slip Casting process (HASC). Correlation between processing parameters, platelet content, platelet orientation and mechanical property enhancement of the fabricated composites was examined. In order to investigate the effect of interfacial compatibility and bonding on the mechanical properties of the fabricated inorganic-organic composites, platelet surfaces were modified with both epoxy- and amino-functional silanes. As received and functionalized platelet surfaces were studied by X-Ray Photoelectron Spectroscopy (XPS) to confirm the success of surface modification. Fabricated bio-inspired bulk lamellar composite materials were characterized in terms of their microstructural architecture and mechanical properties. The results obtained indicated that HASC processed composites exhibit enhanced flexural strength, stiffness ...
In ceramic injection molding, since the particles are very fine, the powders are usually agglomerated. The agglomerates are broken up during the process of high shear mixing, but to retain the deagglomerated state, the use of processing aid is also necessary. Coupling agents, also part of the processing aid, is often used to improve the bonding of polymer to the ceramics. Thus,it is possible to imagine the complex nature of the binder systems that are used for CIM. Given below are examples of some of the commonly used materials in the binder systems: Polypropylene, polyethylene, polyvinyl chloride, paraffin wax, microcrystalline wax, polyethylene glycol, cellulose, polycarhsilane, several alcoxides, agar, vegetable oil, stearic acid, stearates, olates, silanes, titanates, etc. E. water being evaporated). This reduces costs as lower production volume has reduced operating costs. - Fewer environmental issues as there are no combustion by products to exhaust. Ths improves quality by keeping the ...
We report the first Ni MOF catalysts for anti-Markovnikov hydrosilylation of alkenes. These catalysts are bench-stable and easily-assembled from simple Ni salts and carboxylic acids. The best catalyst gives turnover numbers up to 9500 and is robust even after 10 recycling runs. The catalyst can be applied for the hydrosilylation of a wide range of alkenes, achieving good synthetic utility and functional group tolerance. Zhang, Zhikun; Bai, Lichen; Hu, Xile
The phosphine-substituted α-diimine Ni precursor, (Ph2PPrDI)Ni, has been found to catalyze alkene hydrosilylation in the presence of Ph2SiH2 with turnover frequencies of up to 124 h−1 at 25 °C (990 h−1 at 60 °C). Moreover, the selective hydrosilylation of allylic and vinylic ethers has been demonstrated, eve The central role of the d-block metals in the periodic table
How do make porcelain teeth surgery. In order to complete the porcelain crowns to wear into the original state after no more than the thickness of the outer tooth, usually made porcelain teeth to grind the exception of some natural teeth. - PR11706313
A power cable is disclosed, which comprises a conductor having thereon an insulating layer which comprises a composition comprising from 25 to 35% by weight based on the total amount of the composition of an ethylene-vinyl acetate copolymer resin having a vinyl acetate content of from 25 to 33% by weight, and from 65 to 75% by weight based on the total amount of the composition of polyethylene, the polyethylene containing in the molecule thereof vinyltrimethoxysilane by copolymerization or graft polymerization, the composition containing an organo heavy metal compound as a cross-linking catalyst, the insulating layer is cross-linked by the cross-linking reaction of trimethoxysilane groups in the polyethylene in the presence of water.
Epoxidized palm oil (EPO) based polyols were produced from three different molar ratios of EPO and glycerol (1:1.0, 1:1.5, 1:2.0) via hydroxylation reaction. The reduction of oxirane content from 2.9 to 0.04%, the increase in hydroxyl value to 509.6 mgKOH/g and high viscosity of synthesized polyols indicates the opening of epoxy ring and also showed the grafting process had been occurred. Based on FTIR and NMR spectrum, hydroxyl group has been chemically grafted onto the opened epoxy ring of EPO. Polyol-1.5 synthesized from 1 mol of EPO react with 1.5 mol of glycerol was chosen in formulating polyol-silane resin due to its optimum properties and characteristics compared with others. The polyol-1.5 was mixed with different types of silane and hardener to formulate polyol-silane resin. Each silanes was varied with three different weight percentages (10, 30 and 50 wt %). Result shows that only polyol-3-Isocyanatepropyltrimethoxysilane (ICPTES) resin was successfully formed coated film. The ...
2,3-Di-O-benzyl-4,6-O-benzylidene-thiohexopyranosides, on activation with 1-benzenesulfinyl piperidine and triflic anhydride, react with allyl silanes and stannanes, and with silyl enolethers to give C-glycosides. In the mannose series the beta-isomers are formed selectively whereas the glucose series provides the alpha-anomers. This selectivity pattern parallels that of O-glycoside formation and eliminates the need to consider donor-acceptor hydrogen bonding in the formation of the O-glycosides.
This study presents a simple approach to perform selective mass transport through freestanding porous silicon (pSi) membranes. pSi membranes were fabricated by the electrochemical etching of silicon to produce membranes with controlled structure and pore sizes close to molecular dimensions (approximately 12 nm in diameter). While these membranes are capable of size-exclusion based separations, chemically specific filtration remains a great challenge especially in the biomedical field. Herein, we investigate the transport properties of chemically functionalized pSi membranes. The membranes were functionalized using silanes (heptadecafluoro-1,1,2,2-tetrahydrodecyl)dimethylchlorosilane (PFDS) and N-(triethoxysilylpropyl)-o-polyethylene oxide urethane (PEGS) to give membranes hydrophobic (PFDS) and hydrophilic (PEGS) properties. The transport of probe dyes tris(2,2-bipyridyl)dichlororuthenium(ii) hexahydrate (Rubpy) and Rose Bengal (RB) through these functionalized membranes was examined to ...
This thesis work focuses on the design and production of nanoparticle based contrast agents for signal enhancement in magnetic resonance imaging (MRI). Three different synthesis routes are explored, primarily to produce crystalline gadolinium oxide (Gd2O3) nanoparticles, and surface modification is done to obtain stable, dispersible, biocompatible probes inducing high proton relaxivities.. In Paper I and II we utilized the polyol synthesis method and nanoparticle purification was performed with dialysis. Active surface functionalization was achieved by an innermost layer of 3-mercaptopropyl trimetoxy silanes (MPTS) and an outer layer of bifunctional PEG. Surface capping was shown to greatly affect the water proton relaxation to a degree which is strongly dependent on the purification time. PEGylation also induced stabilizing effects and the ability to provide the nanoparticles with luminescent properties was proven by linking the fluorescent dye Rhodamine to the bifunctional PEG.. In Paper III ...
0018] The capillary tube can be made of glass, thermostable plastics or metal. The inner surface of this tube shall be at least nearly free of nucleation centers. This means that the inner surface should be scratch-free and also free of impurities. The glass can be treated as it is known for example in the field of advanced optic systems to get the surface at least nearly free of nucleation centers. It is also envisioned that the glass capillary can be coated (chemically modified) on its inner surface with e.g. silanes, silane-based surface modifications, surfactants or polymers such as e.g. polyelectrolytes. The inner surface of the metal capillary tube can be high polished or perhaps be coated, as described above for glass. The capillary tube can be made of thermostable plastics such as, but not limited to, PFA, PSA, PTFE, PE, PP. It can also be possible to bring another liquid into the tube, whereby this other liquid is phobic with respect to the liquid to be heated. This means that the two ...
Hindered phenol stabilized, stereoregular polymers of branched, higher alpha-olefins can be modified with unsaturated silanes, carboxylic acids, and/or carboxylic acid anhydrides in the presence of a free radical generator in the polymer melt. These polymers can also contain additional additives, such as glass fibers. An aliphatic thio compound is added after the grafting procedure for maximum beneficial effect.
There has been a rise in the demand for rubber additives from the rubber & tire industries. Rubber additives are various kinds of chemicals used for the improvement of rubber strength and performance. Rubber additives generally include sulfur, sulfonamide, thiazoles, carbon black, silica, amines, aliphatic esters, silanes and many other chemical compounds. Rubber additives are added during the vulcanization process for imparting strength and specific properties to the final product. Rubber additives find applications in tires, wires & cables, insulation, tapes, gaskets, conveyer belts and roll coverings, among others. The quality of rubber is dependent on the number of additives added during the processing of rubber. Every additive has its own function, which imparts the respective property to the final rubber product ...
Evidence for Ligand Non-Innocence in a Formally Ruthenium(I) Hydride Complex, Noah L. Wieder, Michelle Gallagher, Patrick J. Carroll, and Donald H. Berry* J. Am. Chem. Soc. 2010, 132, 4107-4109.. Low-Valent Ruthenium Complexes of the Non-innocent 2,6-Bis(imino)pyridine Ligand Michelle Gallagher, Noah L. Wieder, Vladimir K. Dioumaev, Patrick J. Carroll, and Donald H. Berry* Organometallics, 2010, 29,591-603.. D. A. Ruddy, D. H. Berry, and C. Nataro, Synthesis and characterization of 1-methyl-1-silaindane and 1-methyl-1-germaindane, J. Organomet. Chem. 2008, 693, 169-172.. H. Yoo, P. J. Carroll, and D. H. Berry, Synthesis and Structure of Ruthenium-Silylene Complexes: Activation of Si-Cl Bonds in N-Heterocyclic Silanes, J. Amer. Chem. Soc. 2006, 128, 6038-6039. Y. Huo and D. H. Berry, Synthesis and Properties of Hybrid Organic-Inorganic Materials Containing Covalently Bonded Luminescent Polygermanes, Chem. Mat., 2005, 17, 157-163.. B. Arkles, Y. Pan, G.L. Larson, and D. H. Berry, Cyclic ...
Evidence for Ligand Non-Innocence in a Formally Ruthenium(I) Hydride Complex, Noah L. Wieder, Michelle Gallagher, Patrick J. Carroll, and Donald H. Berry* J. Am. Chem. Soc. 2010, 132, 4107-4109.. Low-Valent Ruthenium Complexes of the Non-innocent 2,6-Bis(imino)pyridine Ligand Michelle Gallagher, Noah L. Wieder, Vladimir K. Dioumaev, Patrick J. Carroll, and Donald H. Berry* Organometallics, 2010, 29,591-603.. D. A. Ruddy, D. H. Berry, and C. Nataro, Synthesis and characterization of 1-methyl-1-silaindane and 1-methyl-1-germaindane, J. Organomet. Chem. 2008, 693, 169-172.. H. Yoo, P. J. Carroll, and D. H. Berry, Synthesis and Structure of Ruthenium-Silylene Complexes: Activation of Si-Cl Bonds in N-Heterocyclic Silanes, J. Amer. Chem. Soc. 2006, 128, 6038-6039. Y. Huo and D. H. Berry, Synthesis and Properties of Hybrid Organic-Inorganic Materials Containing Covalently Bonded Luminescent Polygermanes, Chem. Mat., 2005, 17, 157-163.. B. Arkles, Y. Pan, G.L. Larson, and D. H. Berry, Cyclic ...
These price adjustments will ensure that the WACKER SILICONES business division continues to provide outstanding quality products and service along with high delivery reliability. About WACKER SILICONES WACKER SILICONES is one of the largest silicone manufacturers worldwide with over 3,000 highly specialized and innovative products. The divisions portfolio ranges from silicone fluids, emulsions, resins, elastomers and sealants to silanes, silane-terminated polymers and pyrogenic silica. These stand out due to their significant value-adding potential - enhancing both the benefits and performance of customers end products. WACKER SILICONES products find application in such sectors as automotive engineering, construction, chemicals, cosmetics, medical technology, energy & electronics and paper & textiles. ...
Silicones and silanes influence the way interfaces behave. Silicones can be stabilizing or destabilizing. Learn about surface and interface applications for silicones.
This text provides an in-depth examination of sealants, reviewing their historical developments and fundamentals, adhesion theories and properties, and todays wide range of uses. Featuring contributions from international experts, it describes various types of sealants and explores their applications. Topics discussed include organofunctional silanes, testing and durability of sealants, hot melt and intumescent sealants, urethane waterproofing membrane systems, and foam back-up materials. The contributors describe sealant use in a host of industries, including construction, automotive, and medicine. The book is copiously illustrated and provides numerous references for further study.
You may also wish to search for items by Bierbaum, V. and Bierbaum. 57 matching references were found. Bierbaum, V.M.; DePuy, C.H.; Shapiro, R.J., Gas phase reactions of anions with nitrous oxide and carbon dioxide, J. Am. Chem. Soc., 1977, 99, 5800. [all data] DePuy, C.H.; Bierbaum, V.M.; Schmitt, R.J.; Shapiro, R.H., Gas phase oxidation and reduction reactions with C6H7-, HNO-, and HO2-, J. Am. Chem. Soc., 1978, 100, 2970. [all data] Schmitt, R.J.; Bierbaum, V.M.; DePuy, C.H., Gas phase reactions of carbanions with triplet and singlet molecular oxygen, J. Am. Chem. Soc., 1979, 101, 6443. [all data] DePuy, C.H.; Bierbaum, V.M.; Flippin, L.A.; Brabowski, J.J.; King, G.K.; Schmidt, R.J.; Sullivan, S.A., Gas phase reactions of anions with substituted silanes, J. Am. Chem. Soc., 1980, 102, 5012. [all data] Bierbaum, V.M.; Schmidt, R.J.; DePuy, C.H.; Mead, R.H.; Schulz, P.A.; Lineberger, W.C., Reactions of carbanions with triplet and singlet molecular oxygen, J. Am. Chem. Soc., 1981, 103, 6262. [all ...
A process for improved vapor phase silylation of photoresist is disclosed. The process uses silylation materials which either produce a strong base such as dimethylamine upon reaction with a resist film or which contain an improved chemical leaving group such as acetate. The process is effective at temperatures of 135 C. and below. Preferred silylation materials are N,N-dimethylaminotrimethylsilane and trimethylsilylacetate.
Shop a large selection of Thermo Scientific™ Silanized Disposable Culture Tubes products and learn more about Thermo Scientific™ Silanized Disposable
The first unsupported barium siloxide, the homoleptic dimer [Ba {μ -OSi(SiMe ) } {OSi(SiMe ) }], is presented, and its structural features are discussed in the light of DFT computations. This complex, together with the related [Ba{μ -OSi(SiMe ) }{N(SiMe ) }] and their parent [Ba{N(SiMe ) } ] , mediates the formation of asymmetric siloxanes R Si-O-SiR through the first case of main group metal-mediated dehydrocoupling of silanols and hydrosilanes. Early kinetic analysis highlights an unusual catalytic manifold.
An improved process for the preparation of thermoplastic vulcanizates from butyl rubbers by hydrosilylation crosslinking of acrylic or alkacrylic functionalized copolymers of isobutylene and paramethylstyrene is disclosed. The functionalization results in lower compression and tension set than when using conventional butyl rubbers. Other physical properties of the thermoplastic vulcanizate are improved consistent with more efficient crosslinking of the functionalized copolymer.
1. Vulovic, B.; Cinderella, A. P.; Watson, D. A. Palladium-Catalyzed Cross-Coupling of Monochlorosilanes And Grignard Reagents ACS Catal. 2017, 7, 8113-8117.. 2. Bihelovic, F; Vulovic, B; Saicic, R. N. Synthesis of Natural Products and the Development of Synthetic Methodology: The Case Study of (-)-Atrop-abyssomicin C, Nat. Prod. Commun. 2017, 12, 1209-1214.. 3. Vulovic, B; Watson, D. A. Heck-Like Reactions Involving Heteroatomic Electrophiles, Eur. J. Org. Chem. 2017, 4996-5009. [Microreview] (among top ten EurJOC Most Accessed articles). 4. Cinderella, A. P.; Vulovic, B.; Watson, D. A. Palladium-Catalyzed Cross-Coupling of Silyl Electrophiles with Alkylzinc Halides: A Silyl-Negishi Reaction, J. Am. Chem. Soc. 2017, 139, 7741-7744. (Highlighted in Synfacts, 2017, 13, 861.). 5. Vulovic, B.; Maric, I.; Matovic, R.; Saicic, R. N. Synthesis of vinyldihydropyrane by cooperative catalysis, J. Serb. Chem. Soc. 2016, 81, 1135.. 6. Vulovic, B.; Kolarski, D.; Bihelovic, F.; Matovic, R.; Gruden, M.; ...
The rich surface chemistry of mesoporous metal oxides is an important reason why they are widely used in applications such as catalysis, biomolecular separation, etc. At times the surface is modified or functionalized with organic species for stability or for a particular application. In this work, nanocast metal oxides (TiO2, ZrO2 and SnO2) and SiO2 were modified with amino-containing molecules using four different approaches, namely (a) covalent bonding of 3-aminopropyltriethoxysilane (APTES), (b) adsorption of 2-aminoethyl dihydrogen phosphate (AEDP), (c) surface polymerization of aziridine and (d) adsorption of poly(ethylenimine) (PEI) through electrostatic interactions. Afterwards, the hydrolytic stability of each functionalization was investigated at pH 2 and 10 by zeta potential measurements. The modifications were successful except for the AEDP approach which was unable to produce efficient amino-modification on any of the metal oxides used. The APTES, aziridine and PEI ...
Lithium silylamides 1,8-C10H6[N(SiMe3)Li(L)]2 (L = Et2O (); L = TMEDA (1TMEDA)), when treated with PhC [[triple bond, length as m-dash]] N, formed the adducts 1,8-C10H6[N(SiMe3)Li(N [[triple bond, length as m-dash]] CPh)(OEt2)][N(SiMe3)Li(OEt2)] () and 1,8-C10H6[N(SiMe3)Li(N [[triple bond, length as m-dash]] CP...
... is the silane with the formula H2Si(SiH3)2. A liquid at standard temperature and pressure, it is a silicon analogue ... P. W. Schenk (1963). "Silanes". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. 1. NY, NY: Academic ...
"Silanes" (pdf). Gelest. p. 50. Retrieved 2016-12-10. G. Schott, C. Harzdorf (October 1960), "Silane. I Alkalische Solvolyse von ... Trialkylsilanes with n-alkyl residues react by a factor of 10 faster than the analogous silanes with branched alkyl residues. ...
La Porta, Rafael; Lopez‐De‐Silanes, Florencio; Shleifer, Andrei; Vishny, Robert W. (1998). "Law and Finance". Journal of ... Rafael La Porta; Florencio López-de-Silanes; National Bureau of Economic Research (1997). The benefits of privatization: ... Rafael La Porta; Florencio Lopez-de-Silanes; Andrei Shleifer (2007). The Economic Consequences of Legal Origins. National ...
Olmo, Nieves; Turnay, Javier; González de Buitrago, Gonzalo; López de Silanes, Isabel; Gavilanes, José G.; Lizarbe, Maria A. ( ...
La Porta, Rafael; Lopez-de-Silanes, Florencio; Shleifer, Andrei; Vishny, Robert (2000-01-01). "Investor protection and ...
CS1 maint: discouraged parameter (link) CS1 maint: unfit URL (link) Djankov, S.; La Porta, R.; Lopez-De-Silanes, F.; Shleifer, ... Asset stripping Johnson, Simon; La Porta, Rafael; Lopez-de-Silanes, Florencio; Shleifer, Andrei (2000). "Tunneling". American ...
La Porta, Rafael; Lopez de Silanes, Florencio; Shleifer, Andrei; Vishny, Robert (1998). "Law and Finance". Journal of Political ...
Glaeser, Edward L; LaPorta, Rafael; Lopes-de-Silanes, Florencio; Shleifer, Andrei (2004). "Do Institutions Cause Growth?". ...
doi:10.1111/j.1540-6261.1997.tb02727.x. Porta, La; Rafael; Lopez-de-Silanes, Florencio; Shleifer, Andrei (2008). "The Economic ... 2008)), Rafael La Porta, Florencio Lopez-de-Silanes, Andrei Shleifer, and Robert Vishny exploited the exogenous assignment of ... La Porta, Rafael; Lopez-De-Silanes, Florencio; Shleifer, Andrei; Vishny, Robert W. (1997). "Legal Determinants of External ... Porta, La; Rafael; Lopez-de-Silanes, Florencio; Shleifer, Andrei; Vishny, Robert W. (1997). "Legal Determinants of External ...
La Porta, Rafael; Lopez-De-Silanes, Florencio; Shleifer, Andrei (April 1999). "Corporate Ownership Around the World". The ... Lopez-de-Silanes, Florencio; Shleifer, Andrei; Vishny, Robert (January 2000). "Investor protection and corporate governance". ...
Silane is explosive when mixed with air (1 - 98% SiH4). Other lower silanes can also form explosive mixtures with air. The ... Silanes can also be named like any other inorganic compound; in this naming system, silane is named silicon tetrahydride. ... Silanes above Heptasilane don't react spontaneously and can be stored like gasoline. Higher silanes have therefore the ... This method produces a mixture of silanes, which required separation on a high vacuum line. The silanes (SinH2n+2) are less ...
Botero, J. C.; Djankov, S.; Porta, R. L.; Lopez-De-Silanes, F.; Shleifer, A. (2004). "The Regulation of Labor". The Quarterly ...
ISBN 978-0-7060-4285-6. Djankov, Simeon; La Porta, Rafael; Lopez-de-Silanes & Shleifer, Andrei. Regulation of Entry. The ... ISBN 978-0-7658-0897-4. La Porta, Rafael; Lopez-de-Silanes, Shleifer, Andrei & Vishny, Robert. Legal Determinants of External ... Lopez-de-Silanes & Sheleifer, 2002, 28-29 Djankov, McLeish, Nenova & Shleifer, 2003, p. 343 Djankov, 2002, p. 21 Price, 2004, p ...
Rémi Arcangéli; María Cruz López de Silanes; Juan José Torrens (2007), "An extension of a bound for functions in Sobolev spaces ... María Cruz López de Silanes; Juan José Torrens (2009), "Estimates for functions in Sobolev spaces defined on unbounded domains ...
Pickering, TG; Herman, L; Devereux, RB; Sotelo, JE; James, GD; Sos, TA; Silane, MF; Laragh, JH (3 September 1988). "Recurrent ...
p. 168 Griffiths, S.T.; Wilson, R.R. (September 1958). "The spontaneous ignition of alkyl silanes". Combustion and Flame. 2 (3 ... silane 373-67-1 274.37 K (1.22 °C) difluoromethylsilane 420-34-8 237.56 K (−35.59 °C) trifluoromethyl sulfenic trifloromethyl ...
Gilman, H.; Smith, C. L. (1967). "Tetrakis(trimethylsilyl)silane". Journal of Organometallic Chemistry. 8 (2): 245-253. doi: ...
silane: many industrial uses, e.g. manufacture of composite materials and water repellents ...
First trifluoromethyl-substituted organyl(chloro)silanes". Tetrahedron Letters. 25 (21): 2195-2198. doi:10.1016/S0040-4039(01) ...
Impregnating sealers Uses silanes or modified silanes. These are a type of penetrating sealer, which penetrate deeply into the ... Some silane stone sealers based on nanotechnology claim to be resistant to UV light and higher pH levels found in new masonry ... Some modified silane sealers impregnate deeply enough to protect against salt attack, such as efflorescence, spalling, picture ...
Low molecular weight silanes are often pyrophoric. Polymeric hydrosilanes, such as polymethylhydrosiloxane (PHMS) may be ... Retention of configuration at silicon has been observed in silane reductions of chiral triaryl methyl chlorides in benzene. ... tertiary alcohols undergo facile reduction with boron trifluoride etherate but primary alcohols require an excess of the silane ...
The aldol reaction is catalyzed by bis(trifluoromethane)sulfonimide "Tris(trimethylsilyl)silane 97%". Sigma-Aldrich Co. LLC. ... silane, which is comparable as a chemical reagent to tributyltin hydride without the associated toxicity concern of organotin ... silane and triflic acid with evolution of hydrogen. ... "Tris(trimethylsilyl)silane, TTMSS". https://www.organic- ...
Like all silanes, the TMS framework is tetrahedral. TMS is a building block in organometallic chemistry but also finds use in ...
Alkenes and alkynes give alkyl and vinyl silanes; aldehydes and ketones give silyl ethers. Hydrosilylation has been called the ... In certain cases, hydrosilylation results in vinyl or allylic silanes resulting from beta-hydride elimination. Alkynes also ...
Silanes are generally used on nonmetallic oxide surfaces; however monolayers formed from covalent bonds between silicon and ... silanes, phosphonates, etc. SAMs are created by the chemisorption of "head groups" onto a substrate from either the vapor or ...
Pickard, C. J.; Needs, R. J. (2006). "High-Pressure Phases of Silane". Physical Review Letters. 97 (4): 045504. arXiv:cond-mat/ ...
Silane - SiH4. *Silica gel - SiO2·nH2O. *Silicic acid - [SiOx(OH)4-2x]n ...
Gilman, H.; Smith, C. L. (1967). "Tetrakis(trimethylsilyl)silane". Journal of Organometallic Chemistry. 8 (2): 245-253. doi: ... Like many high symmetry compounds, tetrakis(trimethylsilyl)silane has a very high melting point (m.p.) of 319-321 °C. It tends ...
The dehydrogenative coupling of silanes has also been developed. n PhSiH3 → [PhSiH]n + n H2 The dehydrogenation of amine- ...
Albert Chong and Florencio López de Silanes (August 2004). "Privatization in Mexico" (PDF). Inter-American Development Bank. ...
The stretch for Si-H is seen at around 2100 and 910 cm−1. In the case of tertiary silanes however, the peak at 910 cm−1 is not ... Tertiary silanes may also be dehydrogenatively coupled to aromatic rings with the use of the catalyst TpMe2Pt(Me)2H (TpMe2 = ... This reaction applies to a wide range of silanes and acids. The complex [Cu(PPh3)3Cl] can also be used to produce silyl esters ... As well as being coupled to each other, tertiary silanes can be coupled with carboxylic acids to form silyl esters. Ru3(CO)12/ ...
Carlos López de Silanes (born April 18, 1970 in Mexico City) is a retired professional footballer from Mexico, who played as a ... www.neilbrown.newcastlefans.com/wycombe/wycombe.html playerhistory Carlos López de Silanes - FIFA competition record v t e. ...
The higher silanes, such as di- and trisilane, are only of academic interest. About 300 metric tons per year of silane were ... compared to pure silane: even a 1% mixture of silane in pure nitrogen easily ignites when exposed to air.[23] ... Silane MSDS Archived 2014-05-19 at the Wayback Machine *^ V.I Babushok (1998). "Numerical Study of Low and High Temperature ... combustion data are ascribed to the fact that silane itself is stable and that the natural formation of larger silanes during ...
Much progress has been made in the last 8 years in understanding the theory and practice of silane coupling agents. A major ... Oxane bonds of silane coupling agents to metal oxides seem to follow the same mechanism of equilibrium hydrolysis and rebonding ... In practice, the bonds of certain epoxies to silane-primed glass resist debonding by water about a thousand times as long as ... Much progress has been made in the last 8 years in understanding the theory and practice of silane coupling agents. A major ...
The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database ...
Silane definition is - any of various compounds of hydrogen and silicon that have the general formula SinH2n+2 and are ... Share silane Post the Definition of silane to Facebook Share the Definition of silane on Twitter ... Britannica.com: Encyclopedia article about silane. Comments on silane What made you want to look up silane? Please tell us ... First Known Use of silane. 1916, in the meaning defined above. History and Etymology for silane. International Scientific ...
... serve, depending upon the type of the silane, as a radical H-donor or as a hydride donor. The range reaches ... Tris(trimethylsilyl)silane. Silanes are often used as an alternative to toxic reducing agents, e.g. Bu3SnH. But they offer ... silane, which is due to its structure an outstanding radical reducing agent. ...
Spanish firms Biotools and 2B BlackBio today announced a licensing deal that allows Silanes Laboratories to develop and ... NEW YORK (GenomeWeb News) - Spanish firms Biotools and 2B BlackBio today announced a licensing deal that allows Silanes ...
This chapter provides the diffusion coefficient of dodecane in tetramethyl-silane at different concentrations measured using ... Winkelmann J. (2018) Diffusion coefficient of dodecane in tetramethyl-silane. In: Lechner M.D. (eds) Diffusion in Gases, ... This chapter provides the diffusion coefficient of dodecane in tetramethyl-silane at different concentrations measured using ...
Fernando Silanes is part of a global learning community for UX designers. Connect with Fernando and learn UX design from ... My name is Fernando Silanes. Born in Argentina, 30 years ago. Now I live in Chile. Ive worked as Visual Designer, UX/UI & ... Fernando Silanes Product Designer , UX/UI Designer in IDF Design League Coaches ...
... No matter what challenge life throws at you, you will at least never need to worry about your wood ... Play safe, choose Bona Silane adhesives for a floor that will last for generations. Who needs drama when it comes to wood floor ... installation? In fact, Bona Silane Adhesives are so easy, reliable, and long-term they could be described as exciting as a ...
Silane A 179.1Slurry Treated TiO.sub.2 -1% Silane A 179.1Slurry Treated TiO.sub.2 -3% Silane A 182.8Arolon 465 60.2 60.2 60.2 ... no silane 177.3Slurry Treated TiO.sub.2 - 1% Silane A 179.1Slurry Treated TiO.sub.2 - 3% Silane A 182.8Arolon 465 60.2 60.2 ... The silanes of formula (I) may be used alone or in combination with another and different silane, such as one encompassed by ... The silane of formula (I) can be separately employed with the silane of formula (II). For example, they can both be applied ...
... silyl silanes) have been prepared. They have high photosensitivity and excellent resistance to oxygen-reactive ion etching ... For example, where it is desired to couple a silane having an aryl group to another silane, e.g., SiMe3 Cl, the chemistry of ... In a further aspect, this invention relates to a process for preparing a poly(silyl silane) precursor R1 R2 R3 Si-SiR4 R5 R6 ... The poly(silyl silane) homo and copolymers of this invention are soluble in a wide variety of non-polar solvents, (e.g., ...
... Registries: ... barium(+2) cation; dioxido-oxo-silane
... Rick Wilson rick at GENEMAN.WUSTL.EDU Thu Feb 27 15:48:16 EST 1992 *Previous message: ...
This volume chronicles the proceedings of the Fourth International Symposium on Silanes and Other Coupling Agents held under ... Topics covered include: sterically hindered silanes; silane hydrolysis; silane oligomers; adsorption of silanes and their ... Preface Part 1. Silane Coupling Agents Sterically hindered silanes for waterborne systems: A model study of silane hydrolysis, ... electrodeposition of bis-silanes; silanes to provide corrosion resistance and as corrosion fatigue inhibitors; silane and other ...
... silane 97%; CAS Number: 3555-47-3; EC Number: 222-613-4; Linear Formula: [(CH3)3SiO]4Si; find Sigma-Aldrich-454516 MSDS, ... Tetrakis(trimethylsilyloxy)silane (TTMS) is an organosilicon compound used as a precursor to prepare nanostructured ... Tetrakis (trimethylsilyloxy) silane for nanostructured SiO2-like films deposited by PECVD at atmospheric pressure ... Characteristics of Plasma Polymerized Low-dielectric Constant SiCOH Films Deposited with Tetrakis (trimethylsilyloxy) silane ...
The treatment solution includes at least one hydrolyzed bis-functional polysulfur silane of the formula: ##STR1## wherein each ... A method of preventing corrosion of metals using bis-functional polysulfur silanes. The method includes providing a metal ... b) a silane coating bonded to the metal surface, the silane comprising at least one bis-functional polysulfur silane which has ... b) a silane coating bonded to said metal surface, said silane comprising at least one bis-functional polysulfur silane which ...
So, take this mixture, replacing methane with silane, do the experiment again, and see what you get. This assumes that silane ... Repeat the Miller-Urey experiment with silane. Experimental test for silicon-based life among other things. (+14) [vote for,. ... Then again, maybe silane is the wrong place to start, since i dont know if that exists in the interstellar medium.. -. ... Very strange that methane is so common and silane is so rare, that alone seems to cast doubt on the success, but as you said ...
... silane , C8H20O2Si , CID 277995 - structure, chemical names, physical and chemical properties, classification, patents, ...
Both triethoxy(methyl)silane and triacetoxyethylsilane are within an analogue group of substances within which, in general, ... There are no reliable ready biodegradation data available for triethoxy(methyl)silane, therefore good quality data for the ...
Trichloro(ethyl)silane. CAS number:. 115-21-9. No inventory information available. Reference substance information. IUPAC name: ... trichloro(ethyl)silane. CAS information. CAS number:. 115-21-9. Molecular and structural information. ...
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice ...
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.. ...
Florencio Lopez de Silanes. SKEMA Business School ( email ). Avenue Willy Brandt, Euralille. Lille, 59777. France. ... Florencio Lopez de Silanes. SKEMA Business School; National Bureau of Economic Research (NBER) ... La Porta, Rafael and Lopez de Silanes, Florencio and Shleifer, Andrei, Corporate Ownership Around the World (August 1998). ...
Stable aqueous compositions of silane quaternary ammonium compounds are provided by diluting an alkanol solution of the silane ... Stable aqueous compositions of silane quaternary ammonium compounds are provided by diluting an alkanol solution of the silane ... Curing time and silane quat presence were of interest in this test. The substrates used were aluminum coupons. 3-4 drops of ... The major difference seen on the sticks was the even distribution of the silane quat on samples in which formulas A and B were ...
SILRES® BS 1801 is a mixture of octyltriethoxysilanes isomers, with iso-octyltriethoxysilane as the main component. SILRES® BS 1801 is used in undiluted form as an admixture for the integral waterproofing of fresh concrete.
Construction Materials Silanes for Concrete Protection RUSSIA (MOSCOW). Instructor-led training , Customers ... Our goal is to give you a general idea of silane technology, how it helps preserve concrete structures, and its benefits. ...
Get Glycidyloxyalkyl Silanes at Spectrum Chemical. SpectrumChemical.com carries a full line of fine chemicals, lab appliances ...
Silanes are often an alternative. But the Si-H - bond in silanes is relatively strong compared to the appropriate bond in ... Tris(trimethylsilyl)silane. Tris(trimethylsilyl)silane was already described in the literature in 1965. But It was not ... Tris(trimethylsilyl)silane, TTMSS. Tributyltin hydride is the reagent of the choice for the reduction of functional groups ... Reductive radical cyclization of N-allyl-N-dimethylphosphinoyl-2-aminopropyl phenyl selenide using tris(trimethylsilyl)silane ( ...
  • Tetrakis(trimethylsilyloxy)silane (TTMS) is an organosilicon compound used as a precursor to prepare nanostructured organosilicon polymer films by plasma-enhanced chemical vapor deposition (PECVD) at atmospheric pressure. (sigmaaldrich.com)
  • The results show that silane addition to the chitosan-nanosilica membrane in nanosilica:silane as 1:0.50 achieve the best characteristics for polymer electrolyte. (intechopen.com)
  • One way that tire companies are able to do this is by loading high amounts of silica into the tread compound, which requires larger amounts of silane coupling agents so that the silica can react with the polymer as a reinforcing filler. (rubbernews.com)
  • Gelest, Inc . has unveiled its new SIVATETM A610 activated amine functional silane, which improves adhesion, speeds reactivity and increases bond strength in packaging, polymer, micro-electronics and curing applications. (coatingsworld.com)
  • Under the brand names Polymer ST and TEGOPAC®, Evonik supplies a range of silane-modified polymers which are used as binding agents in the manufacture of adhesives and sealants. (evonik.de)
  • Silane-modified polymers of the TEGOPAC® brand differ from conventional silane-terminated systems by way of their structure: The reactive network units in the polymer structure are arranged in a pendant position. (evonik.de)
  • In this article, Non-Tin Catalysts for Crosslinkable Silane-Terminated Polymers , published in the February 2016 issue of Coatings Tech, John Florio and Ravi Ravichandran discuss new tin-free compounds that have been developed for the catalysis of crosslinkable silane-terminated polymer systems. (kingindustries.com)
  • Equilibrium constants for bond reten- tion are so favorable that a silane coupling agent on silica has a thousandfold advantage for bond retention in the presence of water over an alkoxysilane bond formed from hydroxy-functional polymers and silica. (springer.com)
  • Silane coupling agent effect on the fatigue life of suspension bushing compounds. (thefreelibrary.com)
  • S.v. Silane coupling agent effect on the fatigue life of suspension bushing compounds. (thefreelibrary.com)
  • The two sets of formulations from table 2 and table 3 show the increased silica and the three types of silane coupling agent used for the experiments. (thefreelibrary.com)
  • Surface modification of basalt with silane coupling agent on asphalt mixture moisture damage. (springer.com)
  • Gelest offers SIVATE A610 activated amine silane for use as a tie-layer between organic and inorganic substrates in multi-layer packaging, a coupling agent for high speed epoxy adhesive bonding, phenolic resins, polyurethanes and polyamides, or a primer for high-speed UV-acrylated urethane cure systems. (coatingsworld.com)
  • Three bifunctional silane coupling agent monomers and their blends with a cross-linking silane were investigated as six experimental adhesion-promoters in vitro. (niom.no)
  • The control was a pre-hydrolyzed silane coupling agent that is commonly used in dentistry. (niom.no)
  • Silanes " refers to many compounds with four substituents on silicon, including an organosilicon compound . (wikipedia.org)
  • Silane coupling agents for silica-filled tire-tread compounds: The link between chemistry and performance, W.K. Dierkes, L.A.E.M. Reuvekamp, A.J.W. ten Brinke and J.W.M. Noordermeer . (routledge.com)
  • Stable aqueous compositions of silane quaternary ammonium compounds are provided by diluting an alkanol solution of the silane quaternary ammonium compound in water with at least one nonionic surfactant. (freepatentsonline.com)
  • The silica/silane reinforcement system has been used in vehicle tire compounds to reduce rolling resistance and improve wet traction for some time. (thefreelibrary.com)
  • Figure 3 shows the stress-strain of the table 3 compounds with the three different silanes, mercapto (MS), tetrasulfide (TESPT) and disulfide (TESPD). (thefreelibrary.com)
  • Figure 1 shows the rheometer charts for the compounds with the three different coupling silanes. (thefreelibrary.com)
  • Fan, Lin 2019-08-01 00:00:00 A series of phenylethynyl-terminated oligoimides based on 2,3,3′,4′-biphenyltetracarboxylic dianhydride (a-BPDA), 2,2′-bis(trifluoromethyl)benzidine (TFDB), and bis(p-aminophenoxy)dimethyl silane (APDS) with different siloxane content and various calculated molecular weights were synthesized. (deepdyve.com)
  • This company will unveil two new silane-terminated polymers: GENIOSIL ® XM 20 and GENIOSIL XM 25 at The European Coatings Show, taking place April 4-6 in Nuremberg, Germany. (adhesivesmag.com)
  • As all-silane-terminated polymers, GENIOSIL cures at room temperature under the influence of atmospheric humidity via silane crosslinking. (adhesivesmag.com)
  • In contrast to the other polymers, GENIOSIL XM 20 and XM 25 reportedly only have one silane group at one of their chain ends, meaning they are crosslinkable only at that end. (adhesivesmag.com)
  • In early April, the company presented its silane-modified polymers TEGOPAC® Bond 160, TEGOPAC® Bond 170, TEGOPAC® RD 1, and TEGOPAC® RD 2 at the European Coatings Show in Nuremberg, Germany. (evonik.de)
  • Thus, clarifying the effect of silane coupling agents (SCAs) on the TC of the composite is of importance. (nanowerk.com)
  • For other binary silicon hydride, see Silanes . (wikipedia.org)
  • [5] Silane is of practical interest as a precursor to elemental silicon . (wikipedia.org)
  • The trichlorosilane is then converted to a mixture of silane and silicon tetrachloride . (wikipedia.org)
  • An alternative industrial process for the preparation of very high purity silane, suitable for use in the production of semiconductor grade silicon, starts with metallurgical grade silicon, hydrogen, and silicon tetrachloride and involves a complex series of redistribution reactions (producing byproducts that are recycled in the process) and distillations. (wikipedia.org)
  • The silane produced by this route can be thermally decomposed to produce high-purity silicon and hydrogen in a single pass. (wikipedia.org)
  • Oxane bonds of silane coupling agents to metal oxides seem to follow the same mechanism of equilibrium hydrolysis and rebonding, although equilibrium constants have not been measured for individual metal-oxygen- silicon bonds. (springer.com)
  • 1. A composition comprising titanium dioxide particles containing on their surfaces a silane, its hydrolyzates or resulting condensate, which silane possesses at least two to about three hydrolyzable groups bonded to the silicon thereof and an organic group which contains a polyalkylene oxide group, said silane being present on said surfaces in an amount sufficient to improve the dispersibility of said particles in a resin or plastic medium. (google.com)
  • The discoveries gained from the 80's, that replacement of alkyl by silyl groups weakens the Si-H bond at the central silicon atom, were very important for the discovery of tris(trimethylsilyl)silane as reducing agent. (organic-chemistry.org)
  • R. Amrani, F. Pichot, L. Chahed and Y. Cuminal, "Amorphous-Nanocrystalline Transition in Silicon Thin Films Obtained by Argon Diluted Silane PECVD," Crystal Structure Theory and Applications , Vol. 1 No. 3, 2012, pp. 57-61. (scirp.org)
  • Mechanistic studies of hydrosilylation using an optically active silane substrate, R-(+)-methyl-(1-naphthyl)phenylsilane, proceeded with predominant stereochemical retention at silicon, consistent with a carbonyl activation pathway. (osti.gov)
  • We decided to explore two different routes to obtain silicon nanoparticles starting from a silane precursor. (rsc.org)
  • Silane, SiH 4 , reacts with O 2 to give silicon dioxide and water: SiH 4 (g) + 2 O 2 (g) → SiO 2 (s) + 2 H 2 O( ℓ ) A 5.20-L sample of SiH 4 gas at 356 mm Hg pressure and 25 °C is allowed to react with O 2 gas. (bartleby.com)
  • SIVATE A610 silane is a proprietary combination of a cyclic azasilane with an amine functional silane that drives a thermodynamically-favored formation of silicon-oxygen bonds to nearly 85% completion in less than 15 seconds. (coatingsworld.com)
  • The aim of this letter is to characterize ethylene-glycol monolayer precursors formed onto silicon chips by using silanes. (epfl.ch)
  • Obviously, silanes are the reagents of choice. (eurekaselect.com)
  • The synthesis of siloxanes via organo lithium and magnesium reagents is limited by the formation of di- and triarylated silanes (Ar2Si(OR)2, and Ar3SiOR, respectively), and dehalogenated (Ar-H) by-products. (umd.edu)
  • Reductive radical cyclization of N -allyl- N -dimethylphosphinoyl-2-aminopropyl phenyl selenide using tris(trimethylsilyl)silane (TTMSS) / AIBN under UV irradiation gave the corresponding pyrrolidine in 74% yield and a cis/trans ratio of 10/1 which was superior to thermal cyclization. (organic-chemistry.org)
  • The range reaches from simple alkylsilanes ( Et 3 SiH , Et 2 SiH ), alkylsiloxanes ( PMHS , DEMS ), over different phenylsilanes (such as PhSiH 3 , diphenylsilane ) and halosilanes (such as trichlorosilane ) up to tris(trimethylsilyl)silane , which is due to its structure an outstanding radical reducing agent. (organic-chemistry.org)
  • Tris(trimethylsilyl)silane was already described in the literature in 1965. (organic-chemistry.org)
  • Meanwhile many tin-hydride-based reactions can be accomplished with tris(trimethylsilyl)silane. (organic-chemistry.org)
  • Alkyl bromides can be coupled with aryl or heteroaryl bromides in excellent yields in the presence of commercially available tris(trimethylsilyl)silane and a metallaphotoredox catalyst. (organic-chemistry.org)
  • An enhancement in diastereoselectivity using tris(trimethylsilyl)silane instead of tributyltin hydride is discussed. (organic-chemistry.org)
  • Bis- O -thioxocarbamate derivatives of vicinal diols are reduced with tris(trimethylsilyl)silane in the presence of azobisisobutyronitrile to afford the corresponding olefins in good yields. (organic-chemistry.org)
  • The typical organosilicon treatment involves coating such surfaces with a hydrolyzate (and/or condensate of the hydrolyzate) of an organofunctional hydrolyzable silane. (google.com)
  • The polyolefin foam is produced by extruding a mixture which contans polyethylene, silane hydrolyzable with water, a condensing catalyst and a foaming agent. (google.es)
  • Silanes have been used for about half a century as coupling agents / adhesion promoters to promote adhesion between dissimilar materials in a variety of situations, e.g., coating technology, adhesive bonding, and reinforced composites. (routledge.com)
  • This thesis deals with silane-crosslinking of wood-polyethylene composites through reactiveextrusion. (diva-portal.org)
  • A model of interphase for silane-crosslinked wood-polyethylene composites was presented, where it was suggested that the wood particles become surface-treated in the extrusion process, leading to an interphase of more efficient stress transfer. (diva-portal.org)
  • Nothing proves that pure chemical bonding between the wood and polyethylene answers to the strength improvements of the silane-crosslinked composites. (diva-portal.org)
  • Silane Bond Enhancer is a single component material that increases bond strength of resin cements and composites to porcelain. (pattersondental.com)
  • Nanowerk News ) A research team from the Institute of Solid State Physics, Hefei Institutes of Physical Science has conducted a study on thermal conductivity of composites ( Composites Part A: Applied Science and Manufacturing , 'Covalent coupling regulated thermal conductivity of poly(vinyl alcohol)/boron nitride composite film based on silane molecular structure' ). (nanowerk.com)
  • The effects of silane treatment and fiber mass content on crystalline structure, isothermal crystallization process and mechanical performance of composites were evaluated. (mdpi.com)
  • 6. A coated substrate suitable for use in oxygen-reactive ion etching wherein said coating comprises a planarizing layer and a layer of a photoresist which is a positively acting, substantially not-crosslinked, linear poly(silyl silane) having at least 10 recurring units which is effective as both an oxygen-reactive ion etch resistant barrier layer and a photoresist layer. (google.com)
  • The reactive-extrusion aims to graft silanes to the polyethylene in the moltenphase using peroxide as initiator, and a subsequent curing in high humidity and elevated temperature results in crosslinking of the wood-composite. (diva-portal.org)
  • In this study, silane cross-linked wood-polyethylene composite profiles were manufactured by reactive extrusion. (usda.gov)
  • To obtain reactive groups on the silane chains, an acid catalyzed hydrolysis at pH 4 was performed in the presence of acetic acid. (hindawi.com)
  • TEGOPAC® RD 1 and TEGOPAC® RD 2 are silane-modified reactive diluents, which reduce the viscosity of a formulation. (evonik.de)
  • As well as being coupled to each other, tertiary silanes can be coupled with carboxylic acids to form silyl esters. (wikipedia.org)
  • Poly(silyl silanes) have been prepared. (google.com)
  • 1. A method of photopatterning an image onto a substrate coated with a photoresist comprising irradiating the coated substrate with actinic radiation forming a pattern of said image on the substrate, said photoresist being a positively-acting, substantially non-crosslinked linear poly(silyl silane) having at least ten recurring units. (google.com)
  • Catalytic quantities of protons or silyl cations paired with weakly coordinating carborane counterions initiate the reactions, after which proton transfer in the final aromatization step regenerates the active silyl cation species by protodesilylation of a quaternary silane. (sciencemag.org)
  • In the vinyl silane, the C-Si bond is orthogonal to the p orbital of the π bond, but as the electrophile attacks, the silyl group starts to move upwards, increasing the interaction between the C-Si bond and the empty p orbital of the cation. (chemtube3d.com)
  • Furthermore, triethyl(trifluoromethyl)silane prices in regional markets can be found in the report with regards to countries and companies. (marketpublishers.com)
  • The report also focuses on triethyl(trifluoromethyl)silane consumers by providing data on companies that use it. (marketpublishers.com)
  • TRIETHYL(TRIFLUOROMETHYL)SILANE (CAS 120120-26-5) Market Research Report 2018 contents were prepared and placed on the website in January, 2018. (marketpublishers.com)
  • 4. The method of claim 3, wherein said bis-functional polysulfur silane comprises a bis-(triethoxysilylpropyl) sulfide having 2 to 9 sulfur atoms. (google.es)
  • 3.1 The sulfur content can be used to characterize a silane or an admixture of silane and carbon black. (astm.org)
  • 1.1 These test methods cover the determination of the sulfur content of silanes, or of admixtures of silane and carbon black, of the type bis-(triethoxysilylpropyl)sulfane. (astm.org)
  • In addition, these new silanes can act as an accelerator within a typical sulfur cure system. (rubbernews.com)
  • The weight ratio of the silane quaternary ammonium compound and nonionic surfactant is provided to yield a composition which can remain stable in dilute aqueous compositions, can be applied to any surface and dry quickly to provide an anti-microbial film. (freepatentsonline.com)
  • 1. An aqueous composition for killing and/or preventing the formation of mold on a surface susceptible to mold formation, said composition comprising an alkali metal bicarbonate and a silane quaternary ammonium compound. (freepatentsonline.com)
  • 2. The composition of claim 1 wherein said alkali metal bicarbonate is mixed with an aqueous composition containing said silane quaternary ammonium compound. (freepatentsonline.com)
  • 3. The composition of claim 2 wherein said alkali metal bicarbonate is added to said composition by initially blast cleaning said surface susceptible to mold formation with a blast media comprising alkali metal bicarbonate, subsequently applying onto said blast cleaned substrate said aqueous composition containing said silane quaternary ammonium compound. (freepatentsonline.com)
  • 6. The composition of claim 1, wherein said silane quaternary ammonium compound is present in amounts of from 0.3 to 5.0 percent by weight based on the composition. (freepatentsonline.com)
  • 10. The composition of claim 1, wherein said silane quaternary ammonium compound comprises 3-(trimethoxysilyl)propyloctadecyldimethyl ammonium chloride. (freepatentsonline.com)
  • 13. The composition of claim 11, wherein the weight ratio of said silane quaternary ammonium compound to said at least one nonionic surfactant ranges from about 1:1 to 1:2. (freepatentsonline.com)
  • Two quaternary ammonium silanes (QAS) were used to coat silicone rubber tracheoesophageal shunt prostheses, yielding a positively charged surface. (asm.org)
  • 8 ) described the antibacterial properties of a positively charged organosilane quaternary ammonium compound [3-(trimethoxysilyl)-propyldimethyloctadecylammonium chloride (referred to below as QAS, for quaternary ammonium silane)] coating on silicone rubber against a variety of different bacterial strains in vitro and moreover demonstrated the effectiveness of QAS coatings against a Staphylococcus aureus biofilm in vivo. (asm.org)
  • For example, this platinum catalyst can be used to react triethyl silane with benzene to produce phenyltriethylsilane, with the elimination of hydrogen gas. (wikipedia.org)
  • Silane is an inorganic compound with chemical formula , Si H 4 , making it a group 14 hydride . (wikipedia.org)
  • The treatment solution includes at least one hydrolyzed bis-functional polysulfur silane of the formula: ##STR1## wherein each R is an alkyl or an acetyl group, and Z is either --S x or --Q--S x --Q--, wherein each Q is an aliphatic or aromatic group, and x is an integer of from 2 to 9. (google.es)
  • Silane is a fuel of the future, it is an inorganic compound with chemical formula, SiH4, making it a group 14 hydride. (familyfriendlysites.com)
  • of standard coupling agents with a hydrophobic silane or one Modification with extra siloxane cross-linking have improved the water resistance of bonds to glass and metals another hundredfold over that obtained with single coupling agents. (springer.com)
  • The system comprising substrate, silane, and initiator (ACCN) mixed in aqueous medium at 100 C worked well for both hydrophilic and hydrophobic substrates. (organic-chemistry.org)
  • Also, when creating a formulation with silanes, fillers, catalysts and other components, in-depth expertise and experience is required to achieve optimal results. (evonik.de)
  • Tris(pentafluorophenyl)borane (B(C6F5)3)) is another catalyst for the dehydrogenative coupling of tertiary silanes. (wikipedia.org)
  • Tertiary silanes may also be dehydrogenatively coupled to aromatic rings with the use of the catalyst TpMe2Pt(Me)2H (TpMe2 = hydrido tris(3,5-dimethylpyrazolyl)borate). (wikipedia.org)
  • Winkelmann J. (2018) Diffusion coefficient of dodecane in tetramethyl-silane. (springer.com)
  • Silane, methoxydimethylphenyl- (CAS 17881-88-8) Market Research Report 2018 contents were prepared and placed on the website in January, 2018. (marketpublishers.com)
  • Please note that Silane, methoxydimethylphenyl- (CAS 17881-88-8) Market Research Report 2018 is a half ready publication and contents are subject to change. (marketpublishers.com)
  • Amino- and bis-silane pre-treatments for adhesive bonding of aluminium, B.G. Tilset, F. Lapique, A. Bjørgum and C.J. Simensen . (routledge.com)
  • It was suggested that future work in this field, in terms of processing, should address the use of ethylene-vinyl-silane copolymers (EVS) or blends of polyethylene and EVS, to obviate the silane-grafting step in the process. (diva-portal.org)
  • Compared to conventional silanes, SIVATE A610 activated amine silane reacts at high speed and offers adhesion and bonding with a wider variety of substrates, including titanium, copper, aluminum, and EVA copolymers and cellulosic resins. (coatingsworld.com)
  • Silica nanoparticles have been prepared using tetrethylorthosilicate, water, aqueous ammonia, ethanol and octadecyltrimethoxy silane as constituents. (niscair.res.in)
  • Dehydrogenative coupling of primary silane using Wilkinson's catalyst is slow and dependent on the removal of H2 product. (wikipedia.org)
  • This catalyst is particularly useful in reactions involving thiols and tertiary silanes or disilanes. (wikipedia.org)
  • The polyolefin foam contains 60-99.9% polyolefin, 0.1-10% chemically bound hydrolyzed silane, 0-5% condensing catalyst, 0.1-5% water and 0-20% water carrier substance. (google.es)
  • The silanes were allowed to hydrolyze using formic acid as catalyst and were applied to a substrate of silica-coated Ti. (niom.no)
  • The objective of this study is to understand how silane coupling affects the fatigue life or crack cycle of a bushing compound. (thefreelibrary.com)
  • The molecule in the structure of the title compound, C 34 H 60 Si 4 , lies on a twofold rotation axis that passes through the two Si atoms, resulting in a planar cyclo-tetra-silane ring. (iucr.org)
  • 2. The method of claim 1 wherein the polyurea coating composition is provided with the filler(s) and silane compound(s) contained within the first and/or second part. (sumobrain.com)
  • 4. The method of claim 1 wherein the polyurea coating composition is provided with the filler(s) contained within the first and/or second part and the silane compound(s) added to the first and/or second part prior to combining the first and second part or during combining the first part and the second part. (sumobrain.com)
  • Compositions include a water-soluble copolymer, a hydrophilic silane compound, and in some embodiments surfactant dispersed in a liquid phase. (patents.com)
  • In 1957, birefringence of tetrakis(4-phenylphenyl)silane was reported (Hinch & Krc, 1957). (iucr.org)
  • Silanes because of their chemical structure allow bonding with both inorganic and organic molecules. (coatingsworld.com)
  • See pricing info, deals and product reviews for HCL Silane GHS Chemical Label, 2' x 3', Adhesive Vinyl, Yellow/Black, 25 Pack (GH300440023) at Quill.com. (quill.com)
  • Chemical and Solvent Resistant OSHA-GHS Compliant Label is designed for easy Secondary Chemical Container Application Protect the workforce and remain compliant with this Silane Secondary Container GHS Label. (quill.com)
  • Silane GHS Label will save you time and effort when organizing your chemical library. (quill.com)
  • Silane chemical safety label complies with the OSHA HazCom standard 1910.1200, which is now aligned with the Globally Harmonized System (GHS) for Identifying and Labeling hazardous chemicals. (quill.com)
  • Krahn Chemie and Nanjing SiSiB Silicones Co. Ltd. have concluded into a sales and distribution agreement for organofunctional silanes in Europe. (coatingsworld.com)
  • Much progress has been made in the last 8 years in understanding the theory and practice of silane coupling agents. (springer.com)
  • Silanes are often used as an alternative to toxic reducing agents, e.g. (organic-chemistry.org)
  • This volume chronicles the proceedings of the Fourth International Symposium on Silanes and Other Coupling Agents held under the aegis of MST Conferences, LLC in Orlando, FL, June 11-13, 2003. (routledge.com)
  • The coupling agents used in the experiments were bistriethoxysilypropyl tetrasulfide (TESPT), disulfide silane (TESPD) and mercaptosilane (MS). Combinations of a high surface area silica and a high surface area, high structure carbon black, N234, were used with the same curing system. (thefreelibrary.com)
  • BISCO's porcelain primers are silane coupling agents used to improve bonding between porcelain restorations and resin cements. (bisco.com)
  • Alerted by the reported cytotoxicity of 5-12 nm MNP, we studied the adsorption behavior of 1.15 nm MNP and a MNP composite (MNPC), MNPs interlinked by silane coupling agents. (mdpi.com)
  • Lei, H.-Y. Highly Efficient Arsenic Removal Using a Composite of Ultrafine Magnetite Nanoparticles Interlinked by Silane Coupling Agents. (mdpi.com)
  • The present invention concerns a foamed, silane-cross-linked polyolefin foam and a procedure for producing the same. (google.es)
  • 6. The method of claim 1, wherein the mixture is formed such that the extruded polyolefin contains about 0.1-10% CaSO 4 .2H 2 O, up to about 10% vinyltrimethoxy silane, up to about 5% of dicumylperoxide, and up to about 5% of dibutylstonnic dilaurate. (google.es)
  • Conditioning titanium surfaces with 50 µm Al2O3 followed by Alloy Primer or silane mixture of Clearfil Repair system delivered the most stable repair bond strength of the resin composite to titanium compared to other alloy primers and silanes tested. (uzh.ch)
  • Three organosilane monomers, 3-methacryloxypropyltrimethoxysilane, styrylethyltrimethoxysilane, and 3-(N-allylamino) propyltrimethoxysilane, were prepared as 1% (v/v) primers and also blended with a cross-linking silane, 1,2-bis-(triethoxysilyl)ethane at 0.5% (v/v), in a 95:5 solution of ethanol in deionized water. (niom.no)
  • Very strange that methane is so common and silane is so rare, that alone seems to cast doubt on the success, but as you said that is sort of the point. (halfbakery.com)
  • For this reason, the tire industry is moving to the next generation of mercapto silanes which release low to no ethanol. (rubbernews.com)
  • This paper will look at ways to slow down the cure kinetics of the next generation silanes so that the rheology can better match up with the old generation of silanes. (rubbernews.com)
  • Methods for the reduction of the P=O moiety comprising different metal and other hydrides, silanes and other species are surveyed, especially from the point of view of environmentally-friendly (green) chemistry, and practical applicability to be able to select the most suitable reagent. (eurekaselect.com)
  • J. L. Dorier, C. Hollenstein and A. A. Howling, "Spatiotemporal Powder Formation and Trapping in Radio Frequency Silane Plasmas Using Two-Dimensional Polarization-Sensitive Laser Scattering," Journal of Vacuum Science & Technology, Vol. A13, No. 3, 1995, pp. 918-926. (scirp.org)
  • J. L. Dorier,"Genèse, Croissance et Conséquences de Particules Dans les Plasmas en Silane à Basse Pression et Basse Température," Ph.D. Thesis, E.P.F.L, Switzerland, 1996. (scirp.org)
  • Tamara Kovacs and Gyorgy Keglevich, "The Reduction of Tertiary Phosphine Oxides by Silanes", Current Organic Chemistry (2017) 21: 569. (eurekaselect.com)
  • Silane GHS Label is made from a durable 3M Adhesive Vinyl. (quill.com)
  • Sterically hindered silanes for waterborne systems: A model study of silane hydrolysis, E.R. Pohl and A. Chaves . (routledge.com)
  • The SIVATE A610 activated amine silane reacts with more than three times as many hydroxyl groups as conventional ethoxy silanes and has a reaction speed more than 100 times faster than conventional silanes, providing immediate adhesion. (coatingsworld.com)
  • In this work, an economical modifier silane agent-KH550-was used for surface treatment of basalt fiber. (mdpi.com)
  • The transcrystalline (TC) structure could be clearly observed and it grew perpendicular to the surface of MBF, which boosted the nucleation ability on PBS crystallization and the strong interfacial interaction between PBS and silane-treated basalt fiber. (mdpi.com)
  • SILRES ® BS 1801 is approved as a water resisting admixture under EN 934-2:2009 Tab. (wacker.com)
  • 5. The method of claim 4, wherein said bis-functional polysulfur silane comprises bis-(triethoxysilylpropyl) tetrasulfide. (google.es)
  • The extrusion process, whereonly grafting of silanes should take place, has earlier shown to be difficult for a wood composite, leading to unintentional crosslinking (scorch) in the melt and thereby poor processability of the composite. (diva-portal.org)
  • Consequently, a composite not scorched and effectively cured could be obtained, and it was concluded that the complexity of this process, in comparison to the silane-crosslinking of a neat polyethylene, is due to the hydrophilic wood present in the process. (diva-portal.org)
  • silane, methoxydimethylphenyl- manufacturers and suppliers with contacts and product range are mentioned in the study. (marketpublishers.com)
  • 8. the process of treating titanium dioxide with the silane described in claim 5 which comprises flocculating the titanium dioxide in the presence of said silane during the manufacture of titanium dioxide after it has undergone hydroseparation. (google.com)
  • We provide independent and unbiased information on manufacturers, prices, production news and consumers for the global and regional (North America, Asia and Europe) market of Vinyltriacetoxy-silane. (reportsnreports.com)
  • This study examined the effect of silane and phosphate functional monomer on bond strengths between a resin-based luting agent joined to a lithium disilicate ceramic (IPS e.max) and silica (quartz) materials. (go.jp)
  • Combined use of silane in the acidic environment of a phosphate functional monomer and initiators enhances bond strength of a resin-based luting agent to e.max ceramic and quartz materials. (go.jp)
  • Ultradent 60-second Silane is used after hydrofluoric acid etching to prepare the surface for bonding resin. (ultradent.com)
  • Studies have demonstrated that Silane, when used with Porcelain Etch and a quality bonding resin, yields the highest bond strength to porcelain when compared with other porcelain bonding products. (ultradent.com)
  • Porcelain Etch and Silane are designed to be used together when etching porcelain to provide high porcelain-to-resin bond strengths. (ultradent.com)
  • When used with a high-quality bonding resin, Porcelain Etch and Silane can produce one of the highest porcelain-to-resin bond strengths compared to other porcelain bonding products. (ultradent.com)
  • Storage conditions and the type of primer silane or blend significantly affected shear bond strength values. (niom.no)
  • The results of functional groups, morphology and topography analysis on selected membranes show that optimum silane addition provides the hydrogen interaction between chitosan matrix and silane-coupled nanosilica so there is an enhanced in membrane properties for electrolyte membrane. (intechopen.com)
  • In practice, the bonds of certain epoxies to silane-primed glass resist debonding by water about a thousand times as long as the epoxy bond to unprimed glass. (springer.com)
  • Intel, Nov. 11, 1986 (Aloha): A pyrophoric gas silane cylinder leaks through a valve and catches fire. (merriam-webster.com)