Boron Compounds: Inorganic or organic compounds that contain boron as an integral part of the molecule.Boric Acids: Inorganic and organic derivatives of boric acid either B(OH)3 or, preferably H3BO3.Boron Neutron Capture Therapy: A technique for the treatment of neoplasms, especially gliomas and melanomas in which boron-10, an isotope, is introduced into the target cells followed by irradiation with thermal neutrons.Boron: A trace element with the atomic symbol B, atomic number 5, and atomic weight [10.806; 10.821]. Boron-10, an isotope of boron, is used as a neutron absorber in BORON NEUTRON CAPTURE THERAPY.Boranes: The collective name for the boron hydrides, which are analogous to the alkanes and silanes. Numerous boranes are known. Some have high calorific values and are used in high-energy fuels. (From Grant & Hackh's Chemical Dictionary, 5th ed)Borates: Inorganic or organic salts and esters of boric acid.Borohydrides: A class of inorganic or organic compounds that contain the borohydride (BH4-) anion.Neutron Capture Therapy: A technique for the treatment of neoplasms in which an isotope is introduced into target cells followed by irradiation with thermal neutrons.Isotopes: Atomic species differing in mass number but having the same atomic number. (Grant & Hackh's Chemical Dictionary, 5th ed)Neutrons: Electrically neutral elementary particles found in all atomic nuclei except light hydrogen; the mass is equal to that of the proton and electron combined and they are unstable when isolated from the nucleus, undergoing beta decay. Slow, thermal, epithermal, and fast neutrons refer to the energy levels with which the neutrons are ejected from heavier nuclei during their decay.Sulfhydryl Compounds: Compounds containing the -SH radical.Molecular Structure: 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.Metals: 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)Transition Elements: Elements with partially filled d orbitals. They constitute groups 3-12 of the periodic table of elements.Nickel: A trace element with the atomic symbol Ni, atomic number 28, and atomic weight 58.69. It is a cofactor of the enzyme UREASE.Benzene: Toxic, volatile, flammable liquid hydrocarbon byproduct of coal distillation. It is used as an industrial solvent in paints, varnishes, lacquer thinners, gasoline, etc. Benzene causes central nervous system damage acutely and bone marrow damage chronically and is carcinogenic. It was formerly used as parasiticide.Benzene DerivativesHydrocarbons, Aromatic: Organic compounds containing carbon and hydrogen in the form of an unsaturated, usually hexagonal ring structure. The compounds can be single ring, or double, triple, or multiple fused rings.Ochratoxins: Isocoumarins found in ASPERGILLUS OCHRACEUS and other FUNGI. Ochratoxin contaminated FOOD has been responsible for cases of FOODBORNE DISEASES.Crystallography, X-Ray: The study of crystal structure using X-RAY DIFFRACTION techniques. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Enterocolitis, Necrotizing: ENTEROCOLITIS with extensive ulceration (ULCER) and NECROSIS. It is observed primarily in LOW BIRTH WEIGHT INFANT.MiningFraud: Exploitation through misrepresentation of the facts or concealment of the purposes of the exploiter.Gallium: A rare, metallic element designated by the symbol, Ga, atomic number 31, and atomic weight 69.72.Semiconductors: Materials that have a limited and usually variable electrical conductivity. They are particularly useful for the production of solid-state electronic devices.Transistors, Electronic: Electrical devices that are composed of semiconductor material, with at least three connections to an external electronic circuit. They are used to amplify electrical signals, detect signals, or as switches.Solar Energy: Energy transmitted from the sun in the form of electromagnetic radiation.Ytterbium: Ytterbium. An element of the rare earth family of metals. It has the atomic symbol Yb, atomic number 70, and atomic weight 173. Ytterbium has been used in lasers and as a portable x-ray source.Arsenicals: Inorganic or organic compounds that contain arsenic.Alloys: A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions.Chemistry, Analytic: The branch of chemistry dealing with detection (qualitative) and determination (quantitative) of substances. (Grant & Hackh's Chemical Dictionary, 5th ed)Chemistry Techniques, Analytical: Methodologies used for the isolation, identification, detection, and quantitation of chemical substances.1-Octanol: A colorless, slightly viscous liquid used as a defoaming or wetting agent. It is also used as a solvent for protective coatings, waxes, and oils, and as a raw material for plasticizers. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)Octanols: Isomeric forms and derivatives of octanol (C8H17OH).Water: A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)SwedenSolubility: The ability of a substance to be dissolved, i.e. to form a solution with another substance. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Relative Biological Effectiveness: The ratio of radiation dosages required to produce identical change based on a formula comparing other types of radiation with that of gamma or roentgen rays.Fast Neutrons: Neutrons, the energy of which exceeds some arbitrary level, usually around one million electron volts.Siloxanes: Silicon polymers that contain alternate silicon and oxygen atoms in linear or cyclic molecular structures.Aluminum Compounds: Inorganic compounds that contain aluminum as an integral part of the molecule.Electrowetting: Reducing the SURFACE TENSION at a liquid/solid interface by the application of an electric current across the interface thereby enhancing the WETTABILITY of the surface.Dental Impression Materials: Substances used to create an impression, or negative reproduction, of the teeth and dental arches. These materials include dental plasters and cements, metallic oxide pastes, silicone base materials, or elastomeric materials.Dental Impression Technique: Procedure of producing an imprint or negative likeness of the teeth and/or edentulous areas. Impressions are made in plastic material which becomes hardened or set while in contact with the tissue. They are later filled with plaster of Paris or artificial stone to produce a facsimile of the oral structures present. Impressions may be made of a full complement of teeth, of areas where some teeth have been removed, or in a mouth from which all teeth have been extracted. (Illustrated Dictionary of Dentistry, 1982)PolyvinylsCarbodiimidesModels, Molecular: Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.Crystallization: The formation of crystalline substances from solutions or melts. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Chelating Agents: Chemicals that bind to and remove ions from solutions. Many chelating agents function through the formation of COORDINATION COMPLEXES with METALS.Biphenyl CompoundsWood: A product of hard secondary xylem composed of CELLULOSE, hemicellulose, and LIGNANS, that is under the bark of trees and shrubs. It is used in construction and as a source of CHARCOAL and many other products.Leeches: Annelids of the class Hirudinea. Some species, the bloodsuckers, may become temporarily parasitic upon animals, including man. Medicinal leeches (HIRUDO MEDICINALIS) have been used therapeutically for drawing blood since ancient times.

Receptor-mediated targeting of fluorescent probes in living cells. (1/933)

A strategy was developed to label specified sites in living cells with a wide selection of fluorescent or other probes and applied to study pH regulation in Golgi. cDNA transfection was used to target a single-chain antibody to a specified site such as an organelle lumen. The targeted antibody functioned as a high affinity receptor to trap cell-permeable hapten-fluorophore conjugates. Synthesized conjugates of a hapten (4-ethoxymethylene-2-phenyl-2-oxazolin-5-one, phOx) and fluorescent probes (Bodipy Fl, tetramethylrhodamine, fluorescein) were bound with high affinity (approximately 5 nM) and specific localization to the single-chain antibody expressed in the endoplasmic reticulum, Golgi, and plasma membrane of living Chinese hamster ovary cells. Using the pH-sensitive phOx-fluorescein conjugate and ratio imaging microscopy, pH was measured in the lumen of Golgi (pH 6.25 +/- 0.06). Measurements of pH-dependent vacuolar H+/ATPase pump activity and H+ leak in Golgi provided direct evidence that resting Golgi pH is determined by balanced leak-pump kinetics rather than the inability of the H+/ATPase to pump against an electrochemical gradient. Like expression of the green fluorescent protein, the receptor-mediated fluorophore targeting approach permits specific intracellular fluorescence labeling. A significant advantage of the new approach is the ability to target chemical probes with custom-designed spectral and indicator properties.  (+info)

Endocytic sorting of lipid analogues differing solely in the chemistry of their hydrophobic tails. (2/933)

To understand the mechanisms for endocytic sorting of lipids, we investigated the trafficking of three lipid-mimetic dialkylindocarbocyanine (DiI) derivatives, DiIC16(3) (1,1'-dihexadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate), DiIC12(3) (1,1'- didodecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate), and FAST DiI (1,1'-dilinoleyl-3,3,3', 3'-tetramethylindocarbocyanine perchlorate), in CHO cells by quantitative fluorescence microscopy. All three DiIs have the same head group, but differ in their alkyl tail length or unsaturation; these differences are expected to affect their distribution in membrane domains of varying fluidity or curvature. All three DiIs initially enter sorting endosomes containing endocytosed transferrin. DiIC16(3), with two long 16-carbon saturated tails is then delivered to late endosomes, whereas FAST DiI, with two cis double bonds in each tail, and DiIC12(3), with saturated but shorter (12-carbon) tails, are mainly found in the endocytic recycling compartment. We also find that DiOC16(3) (3,3'- dihexadecyloxacarbocyanine perchlorate) and FAST DiO (3, 3'-dilinoleyloxacarbocyanine perchlorate) behave similarly to their DiI counterparts. Furthermore, whereas a phosphatidylcholine analogue with a BODIPY (4,4-difluoro-4-bora-3a,4a-diaza-s-indacene) fluorophore attached at the end of a 5-carbon acyl chain is delivered efficiently to the endocytic recycling compartment, a significant fraction of another derivative with BODIPY attached to a 12-carbon acyl chain entered late endosomes. Our results thus suggest that endocytic organelles can sort membrane components efficiently based on their preference for association with domains of varying characteristics.  (+info)

Orientation of the pore-forming peptide GALA in POPC vesicles determined by a BODIPY-avidin/biotin binding assay. (3/933)

We determined the orientation of a biotinylated version of the pore-forming peptide GALA (WEAALAEALAEALAEHLAEALAEALEALAA) at pH 5.0 in large unilamellar phosphatidylcholine vesicles, using the enhancement of BODIPY-avidin fluorescence subsequent to its irreversible binding to a biotin moiety. GALA and its variants were biotinylated at the N- or C-terminus. BODIPY-avidin was either added externally or was pre-encapsulated in vesicles to assess the fraction of liposome-bound biotinylated GALA that exposed its labeled terminus to the external or internal side of the bilayer, respectively. Under conditions where most of the membrane-bound peptides were involved in transmembrane aggregates and formed aqueous pores (at a lipid/bound peptide molar ratio of 2500/1), the head-to-tail (N- to C-terminus) orientation of the membrane-inserted peptides was such that 3/4 of the peptides exposed their N-terminus on the inside of the vesicle and their C-terminus on the outside. Under conditions resulting in reduced pore formation (at higher lipid/peptide molar ratios), we observed an increase in the fraction of GALA termini exposed to the outside of the vesicle. These results are consistent with a model (Parente et al., Biochemistry, 29:8720, 1990) that requires a critical number of peptides (M) in an aggregate to form a transbilayer structure. When the peptides form an aggregate of size i, with i < M = 4 to 6, the orientation of the peptides is mostly parallel to the membrane surface, such that both termini of the biotinylated peptide are exposed to external BODIPY-avidin. This BODIPY-avidin/biotin binding assay should be useful to determine the orientation of other membrane-interacting molecules.  (+info)

Synthesis of 5-substituted 2'-deoxycytidine 5'-(alpha-P-borano)triphosphates, their incorporationinto DNA and effects on exonuclease. (4/933)

Direct PCR sequencing with boronated nucleotides provides an alternative to current PCR sequencing methods. The positions of boranophosphate-modified nucleotides incorporated randomly into DNA during PCR can be revealed directly by exonuclease digestion to give sequencing ladders. Cytosine nucleotides, however, are especially sensitive to exonuclease digestion and provide suboptimal sequencing ladders. Therefore, a series of 5-substituted analogs of 2'-deoxycytidine 5'-(alpha-P-borano)triphosphates (dCTPalphaB) were synthesized with the hope of increasing the nuclease resistance of deoxycytosine residues and thereby enhancing the deoxycytosine band intensities. These dCTP analogs contain a boranophosphate modification at the alpha-phosphate group in 2'-deoxycytidine 5'-triphosphate (dCTP) as well as a 5-methyl, 5-ethyl, 5-bromo or 5-iodo substitution for the 5-hydrogen of cytosine. The two diastereomers of each new dCTP derivative were separated by reverse phase HPLC. The first eluted diastereomer (putatively Rp) of each dCTP analog was a substrate for T7 DNA polymerase (Sequenase) and had an incorporation efficiency similar to normal dCTP and dCTPalphaB, with the 5-iodo-dCTPalphaB analog being the least efficient. Substitution at the C-5 position of cytosine by alkyl groups (ethyl and methyl) markedly enhanced the dCTPalphaB resistance towards exonuclease III (5-Et-dCTPalphaB >5-Me-dCTPalphaB >dCTPalphaB approximately 5-Br-dCTPalphaB >5-I-dCTPalphaB), thereby generating DNA sequences that better define the deoxycytosine positions. The introduction of modified dCTPalphaB should increase the utility of direct DNA sequencing with boronated nucleoside 5'-triphosphates.  (+info)

Tamoxifen inhibits acidification in cells independent of the estrogen receptor. (5/933)

Tamoxifen has been reported to have numerous physiological effects that are independent of the estrogen receptor, including sensitization of resistant tumor cells to many chemotherapeutic agents. Drug-resistant cells sequester weak base chemotherapeutics in acidic organelles away from their sites of action in the cytosol and nucleus. This work reports that tamoxifen causes redistribution of weak base chemotherapeutics from acidic organelles to the nucleus in drug-resistant cells. Agents that disrupt organelle acidification (e.g., monensin, bafilomycin A1) cause a similar redistribution. Measurement of cellular pH in several cell lines reveals that tamoxifen inhibits acidification of endosomes and lysosomes without affecting cytoplasmic pH. Similar to monensin, tamoxifen decreased the rate of vesicular transport though the recycling and secretory pathways. Organellar acidification is required for many cellular functions, and its disruption could account for many of the side effects of tamoxifen.  (+info)

BOCILLIN FL, a sensitive and commercially available reagent for detection of penicillin-binding proteins. (6/933)

We describe a new, sensitive, rapid, and nonradioactive method involving the use of the commercially available BOCILLIN FL, a fluorescent penicillin, as a labeling reagent for the detection and study of penicillin-binding proteins (PBPs). This method allowed rapid detection of 30 ng of a purified PBP protein under UV light and of 2 to 4 ng of the protein with the aid of a FluorImager. This method also allowed rapid determination of the PBP profiles of Escherichia coli, Pseudomonas aeruginosa, and Streptococcus pneumoniae. The PBP profiles obtained are virtually identical to those reported previously with 3H-, 14C-, or 125I-labeled penicillin. Using this method enabled us to determine the 50% inhibitory concentrations of the penicillin-sensitive and -resistant PBP2x proteins of S. pneumoniae for penicillin G, thereby allowing a direct evaluation of their relative affinities for penicillin G. Finally, this method also allowed us to compare relative affinities of a PBP2x protein for different beta-lactam antibiotics with the aid of fluorescence polarization technology and to monitor a PBP2x protein during purification.  (+info)

cAMP-dependent mobilization of intracellular Ca2+ stores by activation of ryanodine receptors in pancreatic beta-cells. A Ca2+ signaling system stimulated by the insulinotropic hormone glucagon-like peptide-1-(7-37). (7/933)

Glucagon-like peptide-1 (GLP-1) is an intestinally derived insulinotropic hormone currently under investigation for use as a novel therapeutic agent in the treatment of type 2 diabetes mellitus. In vitro studies of pancreatic islets of Langerhans demonstrated that GLP-1 interacts with specific beta-cell G protein-coupled receptors, thereby facilitating insulin exocytosis by raising intracellular levels of cAMP and Ca2+. Here we report that the stimulatory influence of GLP-1 on Ca2+ signaling results, in part, from cAMP-dependent mobilization of ryanodine-sensitive Ca2+ stores. Studies of human, rat, and mouse beta-cells demonstrate that the binding of a fluorescent derivative of ryanodine (BODIPY FL-X ryanodine) to its receptors is specific, reversible, and of high affinity. Rat islets and BTC3 insulinoma cells are shown by reverse transcriptase polymerase chain reaction analyses to express mRNA corresponding to the type 2 isoform of ryanodine receptor-intracellular Ca2+ release channel (RYR2). Single-cell measurements of [Ca2+]i using primary cultures of rat and human beta-cells indicate that GLP-1 facilitates Ca2+-induced Ca2+ release (CICR), whereby mobilization of Ca2+ stores is triggered by influx of Ca2+ through L-type Ca2+ channels. In these cells, GLP-1 is shown to interact with metabolism of D-glucose to produce a fast transient increase of [Ca2+]i. This effect is reproduced by 8-Br-cAMP, but is blocked by a GLP-1 receptor antagonist (exendin-(9-39)), a cAMP antagonist ((Rp)-cAMPS), an L-type Ca2+ channel antagonist (nimodipine), an antagonist of the sarco(endo)plasmic reticulum Ca2+ ATPase (thapsigargin), or by ryanodine. Characterization of the CICR mechanism by voltage clamp analysis also demonstrates a stimulation of Ca2+ release by caffeine. These findings provide new support for a model of beta-cell signal transduction whereby GLP-1 promotes CICR by sensitizing intracellular Ca2+ release channels to the stimulatory influence of cytosolic Ca2+.  (+info)

Interaction of diphtheria toxin T domain with molten globule-like proteins and its implications for translocation. (8/933)

The transmembrane (T) domain of diphtheria toxin has a critical role in the low pH-induced translocation of the catalytic domain (A chain) of the toxin across membranes. Here it is shown that at low pH, addition of proteins in a partly unfolded, molten globule-like conformation converted the T domain from a shallow membrane-inserted form to its transmembrane form. Fluorescence energy transfer demonstrated that molten globule-like proteins bound to the T domain. Thus, the T domain recognizes proteins that are partly unfolded and may function in translocation of the A chain as a transmembrane chaperone.  (+info)

Synonyms for Boron compounds in Free Thesaurus. Antonyms for Boron compounds. 2 synonyms for boron: atomic number 5, B. What are synonyms for Boron compounds?
2-Aminoethoxydiphenyl borate (2-APB) is a chemical that acts to inhibit both IP3 receptors[1] and TRP channels (although it activates TRPV1, TRPV2, & TRPV3 at higher concentrations).[2][3] In research it is used to manipulate intracellular release of calcium ions (Ca2+) and modify TRP channel activity, although the lack of specific effects make it less than ideal under some circumstances. Additionally, there is evidence that 2-APB acts directly to inhibit gap junctions made of connexin.[4] Increasing evidence showed that 2-APB is a powerful modifier of store-operated calcium channels (SOC) function, low concentration of 2-APB can enhance SOC while high concentration induces a transient increase followed by complete inhibition.[5][6][7] ...
Page contains details about BODIPY-labeled (PFS-b-PtBA|)-b-(PFS20-b-PMVSOH120)-b-(PFS-b-PtBA)/PFS-b-P2VP/PFS-b-PtBA supermicelles . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
A process for producing boron nitride using a boron containing ore as a starting material, by reacting naturally occurring ulexite with ammonia at high temperature, for a boron nitride with high impur
Compositions consisting of the reaction product or complex resulting from the mixing of a transition metal compound such as a tetraalkoxy titanium compound and a boron compound such as a trialkyl boron compound are useful in the preparation of catalysts for polymerizing α-olefins exhibiting ultra-high efficiencies at high polymerization temperatures.
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Fluorescent chromophores are compounds that can emit light under certain circumstances. They are useful to chemists as dyes or markers, and can be used for such applications as medical and biological imaging.. In a recent paper that appeared in the Journal of the American Chemical Society, Professor Victor Nemykin (Chemistry and Biochemistry, University of Minnesota Duluth) and his collaborators at the University of Akron (Akron, Ohio) discuss a new fluorescent chromophore, or fluorophore, called BOPHY. (BOPHY stands for bis(difluoroboron)1,2-bis(1H-pyrrol-2-yl)methylene)hydrazine.) This compound is related to a very successful class of fluorophores already in use, the boron dipyrromethene family of compounds. BOPHY is important because it can be produced with a simple two-step procedure, and it is highly fluorescent.. The researchers studied two compounds, the BOPHY chromophore and a tetrameythyl-substituted BOPHY analogue called Me4BOPHY. They investigated the absorption and emissions spectra ...
1-(bromomethyl)-2,3-difluoro-4-methylbenzene chemical properties, What are the chemical properties of 1-(bromomethyl)-2,3-difluoro-4-methylbenzene 261763-43-3, What are the physical properties of 1-(bromomethyl)-2,3-difluoro-4-methylbenzene ect.
2,6-Difluoro-4-hydroxybenzonitrile 123843-57-2 NMR spectrum, 2,6-Difluoro-4-hydroxybenzonitrile H-NMR spectral analysis, 2,6-Difluoro-4-hydroxybenzonitrile C-NMR spectral analysis ect.
Asymmetric dimers of BODIPY dyes were synthesized from a,c-biladiene salts in good yields; this work constitutes a new versatile approach to the synthesis of BODIPY dyads, which display red-shifted absorptions and emissions in the visible spectral region, higher fluorescence quantum yields and larger Stokes
AbstractThree BODIPY ‐peptide conjugates designed to target the epidermal growth factor receptor (EGFR) at the extracellular domain were synthesized and their specificity for binding to EGFR was investigated. Peptide sequences containing seven amino acids, GLARLLT (2) and KLARLLT (3), and 13 amino acids, GYHWYGYTPQNVI (4), were conjugated to carboxyl BODIPY dye (1) by amide bond formation in up ...
CASTRO, SUSANA PATRICIA. Characterization of the Boron Doping Process UsingBoron Nitride Solid Source DiffusionThe purpose of this research has been to develop an optimum process for the borondoping of implants and polysilicon gates of metal-oxide-semiconductor (MOS) devices.An experimental design was constructed to determine the effects of diffusiontemperature, time, and ambient on characteristics of the doping process. A temperaturerange of 800 to 1000 degrees Celsius was studied with a diffusion time between 10 and60 minutes. Two diffusion ambients were used for doping processes, a pure nitrogenambient and a nitrogen-oxygen gaseous mixture. Device wafers were fabricated, and thetesting of MOS capacitors and van der Pauw test structures was performed to determinethe effect of diffusion conditions on flatband voltage and poly gate doping. Materialscharacterization techniques were used on monitor wafers for each diffusion process todetermine the wafer structure formed for each process and ...
Comprehensive supplier list for Cyclopropanesulfonamide,N-[3,4-difluoro-2-[(2-fluoro-4-iodophenyl)amino]phenyl]-N-methyl-,Cyclopropanesulfonamide,N-[3,4-difluoro-2-[(2-fluoro-4-methylphenyl)amino]phenyl]-
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By Heiner E. Goldbach, Benjavan Rerkasem, Monika A. Wimmer, Patrick H. Brown, Michel Thellier, R.W. Bell. The Boron 97 assembly used to be an excellent good fortune in summarising all contemporary advancements in simple and utilized study on borons functionality, specially in vegetation. New thoughts have on the grounds that been built and new perception has been won into the position of boron in plant and animal metabolism. however, there have been nonetheless plenty of open questions. the purpose of the current workshop held in Bonn as a satellite tv for pc assembly to the overseas Plant nutrients Colloquium was once hence to assemble all genuine details which has been received because the Boron 97 assembly and to bring together wisdom, either from animal and plant sciences. moreover, utilized elements needed to be addressed too, as theres an expanding expertise of boron deficiencies even in plants reminiscent of wheat, that have previously no longer been regarded as conscious of boron ...
2-APB was initially shown to be an antagonist for IP3 receptors, blocking IP3-induced calcium release in cerebellar microsomes with an IC50 of 42 μM (Maruyama et al., 1997) and blocking the IP3 receptor in intact cells at 75 μM (Ma et al., 2000). More recent studies have shown that 2-APB is an even more potent blocker for store-operated calcium entry than for IP3-induced calcium release (for review, see Bootman et al., 2002). Moreover, 2-APB at 100 μM concentrations has been found to block volume-regulated anion channels (Lemonnier et al., 2004), to cause mitochondrial swelling (Peppiatt et al., 2003), and to activate calcium permeable cation channels (Braun et al., 2003). In addition, 2-APB was recently reported to exert opposite effects on members of the TRP gene family, decreasing activity of TRP5 and TRP6 at 20 μM (Xu et al., 2005) and activating TRPV1, TRPV2, and TRPV3 at higher concentrations (Hu et al., 2004).. A recent study revealed an unexpected inhibitory action of 2-APB on gap ...
Structure, properties, spectra, suppliers and links for: 7-(3-Amino-3-methyl-1-azetidinyl)-1-cyclopropyl-6,8-difluoro-4-oxo-1,4-dihydro-3-quinolinecarbox.
A new BODIPY derivative beating piperazine group was synthesized and its fluorescent changes towards metal ions as well as pH are studied. The title compound displayed a moderate selectivity for Hg2+ among the metal ions examined ...
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In the present study we show that 2-APB is an efficient inhibitor of Drosophila phototransduction, operating both in intact cells and in isolated ommatidia, and that this inhibition partially reverses when the inhibitor is removed. The great interest in 2-APB arises from its reported function as a powerful probe for assessing involvement of InsP3 receptors in cell signaling (Maruyama et al., 1997; Ma et al., 2000). Indeed, the reversible inhibition of InsP3-induced current oscillations in Xenopus oocytes strongly supports previous studies showing that 2-APB blocks Ca2+ release from InsP3-sensitive Ca2+ stores (Maruyama et al., 1997). Furthermore, the failure of 2-APB to block the Ca2+-activated surface membrane Cl− channels while it suppresses the InsP3-induced activity indicates that the action of 2-APB is confined to the signaling stages downstream of InsP3 production, but upstream of the Ca2+ release-activated processes.. The inhibitory effect of 2-APB on ICl,Ca-induced by Ca2+ store ...
2) If you are unable to determine the boron levels in the soil (technically determination of bio availability boron it is one thing to have a trace element in the soil, its another to have it available for plants to use you need to make sure boron is in your multi tablet ...
Complexation of iminocoumarin derivatives with BF3·OEt2 provides novel N⁁N boron(iii) dyes exhibiting high absorption coefficients and quantum yields as great as 81%. The excellent chemical stability of these dyes enables the grafting of Boranil or Bodipy units to give derivatives in which the Borico subunit
As well as forming triple bonds, boron atoms can now link up chains - in carbon that makes proteins, plastics and alcohols possible
[100 Pages Report] Check for Discount on United States Boron Containing Phenolic Resin Market Report 2017 report by QYResearch Group. In this report, the United States Boron Containing Phenolic Resin...
1-Oleoyl-2-(6-((4,4-difluoro-1,3-dimethyl-5-(4-methoxyphenyl)-4-bora-3a,4a-Diaza-s-indacene-2-propionyl)amino)hexanoyl)-sn-glycero-3- ...
Boron is critical to the growth and health of crops but is needed in small amounts, making it crucial for boron to be delivered evenly in the field.
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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 ...
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View Notes - 25 from CHEM 1000 at Lethbridge College. Chemistry 1000 Lecture 25: Group 14 and Boron Marc R. Roussel Group 14 In this group again, we see a full range of nonmetallic to metallic
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TY - JOUR. T1 - BODIPY-labeled fluorescent aptamer sensors for turn-on sensing of interferon-gamma and adenine compounds on cells. AU - Tsuchiya, Akira. AU - Hashim, Siti N.. AU - Ise, Shoko. AU - Furuhata, Takafumi. AU - Kawai, Kiyohiko. AU - Wakabayashi, Rie. AU - Goto, Masahiro. AU - Kamiya, Noriho. AU - Sando, Shinsuke. PY - 2016/1/1. Y1 - 2016/1/1. N2 - An on-cell aptamer sensor has the potential to reveal cell-cell communications by signalling molecules. We attempted to design new fluorescent aptamer sensors for the sensing of IFN-? and adenine compounds on cells. BODIPY-labeled external quencher-free aptamer sensors have allowed a turn-on detection of the target molecule with improved off/on efficiency.. AB - An on-cell aptamer sensor has the potential to reveal cell-cell communications by signalling molecules. We attempted to design new fluorescent aptamer sensors for the sensing of IFN-? and adenine compounds on cells. BODIPY-labeled external quencher-free aptamer sensors have allowed a ...
This new market research report forecasts on Wurtzite Boron Nitride Market providing complete market figures, consisting market size and estimation by Wurtzite Boron Nitride Market application and products depending upon geographical location for the forecasting period 2017 to 2025. Further, the Wurtzite Boron Nitride Market research report study also encompasses complete industry background, with Wurtzite Boron Nitride Market drivers, competitive market dynamics, market restraints, market growth opportunities, industry challenges and critical success factors (CSFs). The Wurtzite Boron Nitride Market research report examines top industry competitors, offering organization market share analysis and detailed outlines of these firms, with product benchmarking.. Browse Full Report Visit - http://bit.ly/2eO1ezQ. Reasons to Buy This Report :. ...
Boron nitride aerogel is an aerogel made of highly porous boron nitride (BN). It typically consists of a mixture of deformed boron nitride nanotubes and nanosheets. It can have a density as low as 0.6 mg/cm3 and a specific surface area as high as 1050 m2/g, and therefore has potential applications as an absorbent, catalyst support and gas storage medium. BN aerogels are highly hydrophobic and can absorb up to 160 times their mass in oil. They are resistant to oxidation in air at temperatures up to 1200 °C, and hence can be reused after the absorbed oil is burned out by flame. BN aerogels can be prepared by template-assisted chemical vapor deposition at a temperature ~900 °C using borazine as the feed gas. Alternatively it can be produced by ball milling h-BN powder, ultrasonically dispersing it in water, and freeze-drying the dispersion. Song, Yangxi; Li, Bin; Yang, Siwei; Ding, Guqiao; Zhang, Changrui; Xie, Xiaoming (2015). "Ultralight boron nitride aerogels via template-assisted chemical ...
Our unique plasma synthesis process produces high quality BNNT material. This process does not use consumable electrodes or metallic catalysts, and is therefore completely free from metallic contaminants.. Our BNNT purified is produced using a proprietary process which removes free Boron. It also offers a high concentration of boron nitride nanotubes with small diameter, high crystallinity and high purity.. ...
In the present work, Boron nitride nanotubes (BNNTs) were synthesized and submitted to a functionalization process (coating) with glucosamine. The nanostructures were physicochemical and morphologically characterized by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Raman Spectroscopy and Photon Correlation Spectroscopy (PCS). Furthermore, in vitro tests were conducted to evaluate the cytocompatibility of the nanostructures. The results revealed that nanotubes presented size, polydispersity index and Zeta potential adequate to applied in vivo studies. The cytocompatibility test were conducted in normal MRC-5 fibroblast lung cells, through MTT and DAPI assays. The results revealed, in tested concentrations (0.1; 10; 50; 100; 200 µ/mL), that BNNTs no presented a cytotoxic profile and negligible DNA changes. Considering the results obtained, the BNNTs showed adequate characteristic to be applied as novel carrier system for radioisotope and drug delivery.
A plasma treatment has been used to modify the surface of BNNTs. In one example, the surface of the BNNT has been modified using ammonia plasma to include amine functional groups. Amine functionalization allows BNNTs to be soluble in chloroform, which had not been possible previously. Further functionalization of amine-functionalized BNNTs with thiol-terminated organic molecules has also been demonstrated. Gold nanoparticles have been self-assembled at the surface of both amine- and thiol-functionalized boron nitride Nanotubes (BNNTs) in solution. This approach constitutes a basis for the preparation of highly functionalized BNNTs and for their utilization as nanoscale templates for assembly and integration with other nanoscale materials.
In the present work, based on extensive fully atomistic molecular dynamics simulations, we discuss the dynamics of neon atoms oscillating inside (5,5) single-walled carbon nanotubes (CNTs) and boron nitride nanotubes (BNNTs). Our results show that sustained high-frequency oscillatory regimes are possible for a large range of temperatures. Our results also show that the general features of the oscillations are quite similar to those observed in CNT and BNNT, in contrast with some speculations in previous works in the literature about the importance of broken symmetry and chirality exhibited by BNNTs ...
M. Yamaguchi,A. Pakdel,C. Y. Zhi,et al. Utilization Of Multiwalled Boron Nitride Nanotubes For The Reinforcement Of Lightweight Aluminum Ribbons[J]. Nanoscale Research Letters,2013,8 ...
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|p|Ab-initio calculations using density functional theory (DFT) are used to investigate the non-covalent interactions between single wall armchair boron nitride nanotubes (BNNTs) with open ends and several heterocyclic molecules: thiophene (T; C|sub|4|/sub|H|sub|4|/sub|S), benzothiophene (BT; C8H6S) and dibenzothiophene (DBT; C|sub|12|/sub|H|sub|8|/sub|S). In the armchair model the nanotubes exhibit (n, n) chirality; here we consider n = 5. The exchange-correlation energies are treated according to the Hamprecht-Cohen-Tozer-Handy functional in the generalized gradient approximation (HCTH-GGA). A base function with double polarization is used. The geometry optimization of (5,5) BNNT-X; X = T, BT and DBT has been carried out using the minimum energy criterion in 5 different configurations of the molecules adsorbed on the nanotube. Our computer simulations have found that the preferential adsorption site of the molecule on the nanotube surface is the parallel configuration for BT and DBT, and at one
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The present invention provides wood preservative and flame retardant compositions having low leachability comprising micronized boron compounds and, optionally, one or more organic biocides which may be micronized. Also provided is a method for applying the composition to wood and wood products comprising impregnating the wood with the composition.
A process for growing an electrically conductive metalloid thin film on a substrate with a chemical vapor deposition process. A metal source material and a reducing agent capable of reducing the metal source material to a reduced state are vaporized and fed into a reaction space, where the metal source material and the reducing agent are contacted with the substrate. The reducing agent is a boron compound having at least one boron-carbon bond, and the boron compound forms gaseous by-products when reacted with the metal source material. Generally, the boron compound is an alkylboron compound with 0-3 halogen groups attached to the boron. The metal source material and the reducing agent may be fed continuously or in pulses during the deposition process.
In this study, magnesium composites with nano-size boron nitride (BN) particulates of varying contents were synthesized using the powder metallurgy (PM) technique incorporating microwave-assisted two-directional sintering followed by hot extrusion. The effect of nano-BN addition on the microstructural and the mechanical behavior of the developed Mg/BN composites were studied in comparison with pure Mg using the structure-property correlation. Microstructural characterization revealed uniform distribution of nano-BN particulates and marginal grain refinement. The coefficient of thermal expansion (CTE) value of the magnesium matrix was improved with the addition of nano-sized BN particulates. The results of XRD studies indicate basal texture weakening with an increase in nano-BN addition. The composites showed improved mechanical properties measured under micro-indentation, tension and compression loading. While the tensile yield strength improvement was marginal, a significant increase in compressive
Novel boron nitride agglomerated powders are provided having controlled density and fracture strength features. In addition methods for producing same are provided. One method calls for providing a fe
Inquire for United States Rhombohedral Boron Nitride Market Competitive Analysis, Trends and Forecast till 2022, with free sample copy of the report.
Lookchem Provide Cas No.10043-11-5 Basic information: Properties,Safety Data,Sds and Other Datebase. We also Provide Trading Suppliers & Manufacture for 10043-11-5 Boron nitride.
Science & Technology, Life Sciences & Biomedicine, Cell Biology, CELL BIOLOGY, BODIPY, fatty acid-binding protein, FABP, fluorescence, microscopy, CELL-LINE CACO-2, SPECTRAL PROPERTIES, CRYSTAL-STRUCTURE, LIVER, TRAFFICKING, ENDOCYTOSIS, INTESTINE, TRANSPORT, MEMBRANES, PROBES ...
Generally, high-temperature applications require ceramic dielectrics, but these are heavy and brittle, according to Penn State professor of materials science and engineering, Qing Wang, who led the research. Polymer dielectrics are lighter, but have tended to degrade in performance or melt at high temperatures, necessitating a cooling system, which adds further weight and complexity.. Wang and his team used boron nitride, a two-dimensional substance similar in structure to graphene which has been shown to have dielectric properties, in the form of nanosheets about 2nm thick and 400nm across as the active agent in a cross-linked polymer nanocomposite with benzenecyclobutene, a polymer used in electronics. The composite can be made by just mixing the boron nitride and the polymer precursor, then curing with heat or light to create the cross-linked structure. Because the nanosheets are so small, the polymer remains flexible. The team claims in a paper in Nature that the polymer can be ...
Boron is needed by life. In 2013, a hypothesis suggested it was possible that boron and molybdenum catalyzed the production of RNA on Mars with life being transported to Earth via a meteorite around 3 billion years ago.[115]. There exists one known boron-containing natural antibiotic, boromycin, isolated from streptomyces.[116][117]. Boron is an essential plant nutrient, required primarily for maintaining the integrity of cell walls. However, high soil concentrations of , 1.0 ppm lead to marginal and tip necrosis in leaves as well as poor overall growth performance. Levels as low as 0.8 ppm produce these same symptoms in plants that are particularly sensitive to boron in the soil. Nearly all plants, even those somewhat tolerant of soil boron, will show at least some symptoms of boron toxicity when soil boron content is greater than 1.8 ppm. When this content exceeds 2.0 ppm, few plants will perform well and some may not survive. When boron levels in plant tissue exceed 200 ppm, symptoms of boron ...
Artificial Light-Harvesting Arrays: Electronic Energy Migration and Trapping on a Sphere and between Spheres A sophisticated model of the natural light-harvesting antenna has been devised by decorating a C60 hexa-adduct with ten yellow and two blue boron dipyrromethene (Bodipy) dyes in such a way that the dyes retain their individuality and assist solubility of the fullerene. Unusually, the fullerene core is a poor electron acceptor and does not enter into light-induced electron-transfer reactions with the appended dyes, but ineffective electronic energy transfer from the excited-state dye to the C60 residue competes with fluorescence from the yellow dye. Intraparticle electronic energy transfer from yellow to blue dyes can be followed by steady-state and time-resolved fluorescence spectroscopy and by excitation spectra for isolated C60 nanoparticles dissolved in dioxane at 293 K and at 77 K. Full article ...
In 1947, while teaching a graduate course in physics at the University of Chicago, Enrico Fermi famously posed the question, "What is the deepest hole that may be dug into the Earth?" Since it was an experiment that had never been done, he didnt have the answer, but it sure got the students thinking.. The first thing youd need is a material that can penetrate the very hard, very high-pressure, very hot deepest mantle. In the movie The Core, an ingenious inventor, Edward Brazzleton (played by Delroy Lindo), comes up with superhard, refractory "unobtainium," based on boron nitride, to sheath a drill ship that can propel itself through Earths mantle, while not baking the people inside it to a crisp.. Personally I think the script writers missed a great opportunity by not naming unobtainium, which obviously was obtainable, brazzletonite instead.. "Everybody knows that boron nitride crystals are six times harder than diamond," Brazzleton says. Well… boron nitride is certainly an interesting ...
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Fluorescence imaging is a powerful tool in biomedical research. It has been frequently used to uncover or better understand physiological mechanisms in disease-related processes such as cancer. The majority of chromophores used for imaging are based on a 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) scaffold. However, their applications are limited due to their poor water solubility as well as poor cancer cell selectivity. To circumvent these drawbacks, we present herein the use of bis(dipyrrinato)zinc(II) complexes. As this class of compounds is associated with a quenching effect of the excited state in water, the lead compound of this study (3) was encapsulated in a polymer matrix with biotin as a targeting moiety (3-NP). This encapsulation improved the water solubility, overcame the quenching effects in water, as well as allowed selective accumulation in the lysosomes with a bright fluorescence signal in monolayer cells as well as 3D multicellular tumor spheroids (MCTS). As a benefit ...
A method for producing products for treating wood and other cellulose products to improve the flame retardancy, and the insecticidal and fungicidal properties of the products. A calcium borate ore, such as colemanite, is reacted first with an acid such as acetic acid. The reaction products, including calcium in solution, are then treated with ammonia, producing ammonium pentaborate. The resulting composition is applied to the wood or other cellulose products by methods such as pressure, diffusion, or immersion and/or dipping treatment. The products have superior leach resistance to water when compared to conventional treatment compounds.
Boron is the most widely deficient minor nutrient in vegetable crop soils. It is needed for protein synthesis and increases flower set, crop yield and quality. In combination with adequate phosphorus, boron increases pollination, fruit set and seed development. Boron deficiency causes growth reduction at the growing tips. Plants have small, crinkled, deformed leaves with large areas of discoloration. Boron deficiency is often caused by application of too much lime. While boron is essential for root growth and fruit development, it can become toxic if over-applied. Always test the soil and apply only the recommended amount. The deformed fruit of these strawberries is due to a deficiency of boron, which also deforms the plants leaves and roots. Bushy, drooping, crinkled leaves indicate boron deficiency in potato plants.
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TY - JOUR. T1 - NaBC1 is a ubiquitous electrogenic Na+-coupled borate transporter essential for cellular boron homeostasis and cell growth and proliferation. AU - Park, Meeyoung. AU - Li, Qin. AU - Shcheynikov, Nikolay. AU - Zeng, Weizong. AU - Muallem, Shmuel. PY - 2004/11/5. Y1 - 2004/11/5. N2 - Boron is a vital micronutrient in plants and may be essential for animal growth and development. Whereas the role of boron in the life cycle of plants is well documented, nothing is known about boron homeostasis and function in animal cells. NaBC1, the mammalian homolog of AtBor1, is a borate transporter. In the absence of borate, NaBC1 conducts Na+ and OH- (H+), while in the presence of borate, NaBC1 functions as an electrogenic, voltage-regulated, Na+-coupled B(OH)4 - transporter. At low concentrations, borate activated the MAPK pathway to stimulate cell growth and proliferation, and at high concentrations, it was toxic. Accordingly, overexpression of NaBC1 shifted both effects of borate to the left, ...
The data comes from registration dossiers submitted to ECHA by the date indicated as last update. The Total Tonnage Band is compiled from all the dossiers with two exceptions; any tonnages claimed confidential and any quantity used as an intermediate to produce a different chemical. The Total Tonnage band published does not necessarily reflect the registered tonnage band(s).. Please note that some of the information on registered substances may belong to third parties. The use of such information may therefore require the prior permission of the third party owners. Please consult the Legal Notice for further information.. ...
The aim of this work was to develop a chemical vapour deposition process and understand the growth of sp2 hybridised Boron Nitride (sp2-BN). Thus, the growth on different substrates together with the variation of growth parameters was investigated in details and is presented in the papers included in this thesis. Deposited films of sp2-BN were characterised with the purpose to determine optimal deposition process parameters for the growth of high crystal quality thin films with further investigations of chemical composition, morphology and other properties important for the implementation of this material towards electronic, optoelectronic devices and devices based on graphene/BN heterostructures.. For the growth of sp2-BN triethyl boron and ammonia were employed as B and N precursors, respectively. Pure H2 as carrier gas is found to be necessary for the growth of crystalline sp2-BN. Addition of small amount of silane to the gas mixture improves the crystalline quality of the growing sp2-BN ...
Using a combination of gain- and loss-of-function experiments, we showed that CD36 is downstream of Meox2/Tcf15-mediated uptake of FFAs originating from both bovine serum albumin conjugates and VLDL particles in heart ECs. The high CD36 expression levels in comparison with other transporter genes in heart ECs further support its important role in cardiac FA uptake. Nevertheless, although, in our DiI-VLDL assay, CD36s contribution to Meox2/Tcf15-driven FFA uptake could have been underestimated by simultaneous detection of particle uptake, the fact that CD36 knockdown only partially impaired Meox2/Tcf15-driven uptake of BODIPY-labeled FFAs suggests the existence of other Meox2/Tcf15 downstream mediators or the occurrence of compensatory mechanisms upon CD36 knockdown.. In Meox2+/−:Tcf15+/− heart ECs, Fatp3, a FA transporter regulated by the paracrine VEGF-B,21 was increased, but this was not sufficient to fully compensate for the partial loss of CD36 induced by Meox2+Tcf15 haplodeficiency, ...
Reagents and antibodies. All pharmacologic agents were purchased from Sigma (St. Louis, MO) unless stated otherwise. Rhodamine and Bodipy-labeled α-bungarotoxin were from Molecular Probes (Eugene, OR); secondary antibodies coupled with either Cy2 or Cy3 were from Amersham Biosciences (Piscataway, NJ). Affinity-purified polyclonal antiserum against the extracellular domain of NRG (183N) was prepared as described previously (Loeb et al., 1999). Monoclonal antibodies against SV2 were a generous gift from Kathy Buckley (Harvard Medical School, Boston, MA), and those against agrin (6D2) were a generous gift from Willi Halfter (University of Pittsburgh, Pittsburgh, PA). Mouse monoclonal IgG supernatant against neurofilaments (RT-97) was obtained from the Developmental Studies Hybridoma Bank at the University of Iowa (Iowa City, IA) under contract N01-HD-7-3263 from the National Institute of Child Health and Human Development. BDNF, NT-3, and GDNF were generous gifts from Amgen (Thousand Oaks, CA) and ...
Product page for tert-butyl N-[(tert-butoxy)carbonyl]-N-[2,6-difluoro-4-(tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]carbamate, Molecular Formula C22H32BF2NO6.
1H-Carbazole-1-aceticacid,6,8-difluoro-2,3,4,9-tetrahydro-9-[[4-(methylsulfonyl)phenyl]methyl]-,(-)-/ACM121083054 can be provided in Alfa Chemistry. We are dedicated to provide our customers the best products and services.
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94135-38-3 - IVKTWEUOWAMBNB-MOWALVJDSA-N - 6alpha,9-Difluoro-5,16beta-dihydro-11beta,21-dihydroxypregna-1,4-dieno(17,16-c)pyrazole-3,20-dione 21-valerate - Similar structures search, synonyms, formulas, resource links, and other chemical information.
MolCore offers CAS No.15952-70-2, 1,3-Dichloro-2,4-difluoro-5-nitrobenzene for your research needs.Find product specific information including MFCD03094441,15952-70-2 MSDS,Price,Custom Synthesis.
When mixed with lightweight polymers, tiny carbon tubes reinforce the material, promising lightweight and strong materials for airplanes, spaceships, cars and even sports equipment. While such carbon nanotube-polymer nanocomposites have attracted enormous interest from the materials research community, a group of scientists now has evidence that a different nanotube -- made from boron nitride -- could offer even more strength per unit of weight. They publish their results in the journal Applied Physics Letters.
A method for preparing a copper pad surface for electrical connection that has superior diffusion barrier and adhesion properties is provided. In the method, a copper pad surface is first provided that has been cleaned by an acid solution, a protection layer of a phosphorus or boron-containing metal alloy is then deposited on the copper pad surface, and then an adhesion layer of a noble metal is deposited on top of the protection layer. The protection layer may be a single layer, or two or more layers intimately joined together formed of a phosphorus or boron-containing metal alloy such as Ni-P, Co-P, Co-W-P, Co-Sn-P, Ni-W-P, Co-B, Ni-B, Co-Sn-B, Co-W-B and Ni-W-B to a thickness between about 1,000 Å and about 10,000 Å. The adhesion layer can be formed of a noble metal such as Au, Pt, Pd and Ag to a thickness between about 500 Å and about 4,000 Å.
Calcium w/Boron (Vegetarian Capsules) Hypoallergenic Boron is essential for maintaining a proper calcium balance and helping to maintain bone health. Target-Mins are complexed with specific free form amino acids and other carriers for optimum mineral transport. Supplement Facts: Serving Size 4 capsules Servings Per Container 22 Amount Per Serving - % Daily Value Calcium (as calcium aspartate, citrate, carbonate, lysinate, alpha-ketoglutarate) 1,000mg 100% Boron (as boron citrate aspartate complex, picolinate complex, alpha-ketoglutarate complex) 4mg Directions: Adults take two (2) to four (4) capsules. For best utilization, take with food. Other Ingredients: Gelatin (capsule shell), magnesium stearate. Does Not Contain: Yeast, corn, wheat, soy, gluten, milk, salt, sugar, starch, preservatives or artificial color.
Background Antigen stimulation of immune cells triggers Ca2+ entry through Ca2+ release-activated Ca2+(CRAC) channels, promoting an immune response to pathogens. Defects in a CRAC (Orai) channel in...
Boron is an important trace mineral, and may contribute to the maintenance of bone health. Shop all Boron Supplements plus free UK delivery at bodykind.
BORON (REVISED) Note: This article, originally published in 1998, was updated in 2006 for the eBook edition. Overview Boron is the first element in Group 13 (IIIA) of the periodic table [1]. The periodic table [2] is a chart that shows how the chemical elements are related to each other.
Boron Nitride Crucibles BN bulk & research qty manufacturer. Properties, SDS, Applications, Price. Free samples program. Term contracts & credit cards/PayPal accepted.
In the preparation of C18-bonded phases higher coverage densities were obtained using dimethylaminodimethyl-n-octadecylsilane than chlorodimethyl-n-octadec
Fluorescent dyes have been used for decades in many applications due to their versatility, sensitivity and many other useful properties. Since their discovery in 1968, BODIPY dyes have come forward and have been used in ...
Angstrom liquid boron supplement has 50 ppm, and is watersoluble and ionic. Angstrom Boron is also known as the calcium helper. Available in 16 oz bottles
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Chemistry Assignment Help, Show the properties of tetrahydrido borate, Q. Show the properties of Tetrahydrido borate? Tetrahydrido borate anion BH - 4 has a tetrahedral structure which can be explained on the basis of sp 3 hybridisation of boron. You have already studied that NaBH 4 is an important reagent for th
Colloidal minerals calcium The absorption of calcium is one of the most important issues in human nutrition yet calcium remains one of the most difficult minerals to assimilate. Colloidal minerals
Buy Solgar Calcium Magnesium plus Boron online. Health supplement to aid bones and teeth and metabolise the nutrients to do this.
Experimental and Theoretical Studies of Boron and Hydrogen Containing Compounds in Relation to Potential Hydrogen Storage and Ionic Conduction ...
Boron sodium oxide (B4Na2O7) | B4Na2O7 | CID 10219853 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
Real Food - Food Form Boron 60 Tabs * Supports Bone Strength * Supports Healthy Energy Levels * Supports Joint Mobility and may e...
Since it is regarded as a trace mineral, boron is needed by the body in small amounts for all sorts of biochemical and physiological processes for growth and overall health.
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Ever heard of boron? Probably not because boron is not a popular supplement that many men consider. Nevertheless, boron has…. Continue Reading →. ...
4-amino-1-(2-deoxy-2,2-difluoro-О-D-erythro- pentofuranosyl)pyrimidin-2(1H)-one (gemcitabine О-anomer). It is clearly useful for all patients in whom the diagnosis of RP is in question.
The syntheses of representative diphenyl- and difluoroboron chelates of 2-hydroxycarbohydroxamic acids (glycolohydroxamic acids) are reported. Crystals of 5-(1-hydroxycyclohexyl)-2,2-diphenyl-1,3-dioxa-4-azonia-2-borata-4-cyclo pentene, 2a, are triclinic. ...
... s are seen in many boron compounds, such as diborane (B2H6). The monomer BH3 is unstable since ... A B−H−B 3-center-2-electron bond is formed when a boron atom shares electrons with a B−H bond on another boron atom. In ... This type of bond also occurs in carbon compounds, where it is sometimes referred to as hyperconjugation; another name for ... each boron is surrounded by a stable octet. ... Boron compounds[edit]. Resonance structures of 3c-2e bond in ...
Robert, Brotherton; Joseph, Weber; Clarence, Guibert & John, Little (2000). "Boron Compounds". Ullmann's Encyclopedia of ... Because LiBF4 and other alkali-metal salts thermally decompose to evolve boron trifluoride, the salt is commonly used as a ... Lithium tetrafluoroborate is an inorganic compound with the formula LiBF4. It is a white crystalline powder. It has been ...
"Boron and Compounds". National Pollutant Inventory. Australian Government. "Decaborane". Organic Chemistry Portal. "Boron ... This white crystalline compound is one of the principal boron hydride clusters, both as a reference structure and as a ... Each boron has one "radial" hydride, and four boron atoms near the open part of the cluster feature extra hydrides. In the ... In fusion research, the neutron-absorbing nature of boron has led to the use of these thin boron-rich films to "boronize" the ...
This planar compound has idealized C2V molecular symmetry. The boron atom is sp2-hybridized and contains an empty p-orbital. ... ISBN 978-3-540-59182-5 Lappert, M. F. (1956). "Organic Compounds Of Boron". Chem. Rev. 56 (5): 959. doi:10.1021/cr50011a002. ... 3.0.CO;2-M. Ainley, A. D.; Challenger, F. (1930). "Studies of the boron-carbon linkage. Part I. The oxidation and nitration of ... Collective Volume, 4, p. 68 Snyder, H. R.; Kuck, J. A.; Johnson, J. R. (1938). "Organoboron Compounds, and the Study of ...
With 7-membered rings, the heteroatom must be able to provide an empty pi orbital (e.g., boron) for "normal" aromatic ... Although heterocyclic chemical compounds may be inorganic compounds or organic compounds, most contain at least one carbon. ... A heterocyclic compound or ring structure is a cyclic compound that has atoms of at least two different elements as members of ... Heterocyclic compounds are pervasive in many areas of life sciences and technology.[9] Many drugs are heterocyclic compounds.[ ...
Altschuller, Aubrey P. (4 October 1955). "Calculated Heats of Formation and Combustion of Boron Compounds (Boron, Hydrogen, ... Bell, R. P.; Emeléus, H. J. (1948). "The boron hydrides and related compounds". Quarterly Reviews, Chemical Society. 2 (2): 132 ... Trimethyldiborane has two methyl groups on one boron atom, and one methyl and a hydrogen on the second boron atom. A bridge of ... The chemistry of boron. Part VI. New preparative methods and decomposition studies relating to methyldiboranes". Journal of the ...
It inflames in air.[citation needed] Boron compounds: pentaborane (11). Webelements.com. Retrieved 2014-10-02. Boranes. Science ... Pentaborane(11) is inorganic compound with the chemical formula B5H11. It is a colorless liquid at room temperature with a ...
Bell, R. P.; Emeléus, H. J. (1948). "The Boron Hydrides and Related Compounds". Quarterly Reviews, Chemical Society. 2 (2): 132 ... Shore, S. G. (1975). "Nido and Arachno Boron Hydrides". In Muetterties, Earl L. Boron Hydride Chemistry. Academic Press. p. 150 ... The Chemistry of Boron. Part VI. New Preparative Methods and Decomposition Studies Relating to Methyldiboranes". Journal of the ... 23 (Metal-Organic Compounds): 92. doi:10.1021/ba-1959-0023.ch010. ISBN 0-8412-0024-6. Retrieved 17 August 2015. Mikhailov, B. M ...
Altschuller, Aubrey P. (4 October 1955). "Calculated Heats of Formation and Combustion of Boron Compounds (Boron, Hydrogen, ... Bell, R. P.; Emeléus, H. J. (1948). "The boron hydrides and related compounds". Quarterly Reviews, Chemical Society. 2 (2): 132 ... The chemistry of boron. Part VI. New preparative methods and decomposition studies relating to methyldiboranes". Journal of the ... 1,1-Dimethyldiborane is the organoboron compound with the formula (CH3)2B(μ-H)2BH2. A pair of related 1,2-dimethyldiboranes are ...
"The Boron Hydrides and Related Compounds". Quarterly Reviews, Chemical Society. 2 (2): 132. doi:10.1039/QR9480200132. . The ... G. G. Graf (2005). "Tin, Tin Alloys, and Tin Compounds". Ullmann's Encyclopedia of Industrial Chemistry,. Weinheim: Wiley-VCH. ...
Brown, Charles A.; Muetterties, Earl L.; Rochow, Eugene G. Boron-nitrogen systems. III. Addition compounds of boron trifluoride ... Muetterties's work on boron hydride clusters led to the work on several polyhedral borane anions such as B12H122−. Muetterties ... He also edited books on boron chemistry and transition-metal hydrides and wrote reviews on complexes with unusual coordination ... In collaboration with William D. Phillips he exploited NMR for study of dynamic processes in inorganic fluoride compounds. ...
Ionic boron compounds. U.S. Patent 3390966 (1968). Knoth, Walter H., Jr. Neutral and singly charged derivatives of decaboranes ... The discovery that tetrafluorethylene would cyclize with a wide variety of compounds to give fluorinated compounds opened up ... Urea and uracil compounds discovered in CRD were potent and selective herbicides, propelling DuPont into the agricultural ... Synthesis of new organic and inorganic compounds accounted for about half of the total research. When the National Institute of ...
With N. M. Gupta and R. C. Ray.) Some compounds of boron, hydrogen and oxygen. London: H. K. Lewis & Co. Ltd. 1918. On the ...
... on boron, silicon, & their compounds; and on meteoric stones ... including a distinction of compounds into colloids & ...
... are compounds of tungsten and boron. Their most remarkable property is high hardness. The Vickers hardness of ... and WB4 crystals can be grown by arc-melting a mixture of elemental tungsten and boron. WB2 has the same hexagonal structure as ...
... are compounds of osmium and boron. Their most remarkable property is potentially high hardness. It is thought ... which is a hazardous compound. Synthesis occurs at high temperatures (~1000 °C) from a mixture of MgB2 and OsCl3. Three osmium ... that a combination of high electron density of osmium with the strength of boron-osmium covalent bonds will make osmium borides ...
... s are compounds of ruthenium and boron. Their most remarkable property is potentially high hardness. Vickers ...
"Trihalides: Boron-Halogen Compounds READ FEEDBACK VERSION HISTORY USAGE". boundless.com. Retrieved 7 June 2017. ... A trihalide in chemistry is an organohalide consisting of three halide atoms bonded to a single atom or compound. An example of ...
The compound bortezomib with a boronic acid group is a drug used in chemotherapy. The boron atom in this molecule is a key ... As a compound containing a carbon-boron bond, members of this class thus belong to the larger class of organoboranes. Boronic ... Frankland, E. (1862). "On a new series of organic compounds containing boron". J. Chem. Soc. 15: 363. doi:10.1039/JS8621500363 ... or other organoborane compound) in which a carbon-boron bond is broken and replaced with a carbon-hydrogen bond. ...
... the agricultural consumption of boron compounds attained considerable dimension". Warington went on to produce papers on other ... Her work on boron was the basis for her D.Sc. from the University of London. Katherine Warington's father had worked at ... Warington's work with boron came about because an entomologist wanted to find a way of making bean plants distasteful to black ... By 1923 she had published the proof that boron was essential to the healthy growth of broad beans. Dr Hugh Nicol commented "It ...
Phillips, W. D.; Miller, H. C.; Muetterties, E. L. B11 magnetic resonance study of boron compounds. Journal of the American ...
... especially derivatives of boron and phosphorus. She has also been conducted research on bioactive boron compounds. She has ... Much of her work focuses on main group compounds, ...
Boron single-bonds on boroxine compounds are mostly s-character. Ethyl-substituted boroxine has B-O bond lengths of 1.384 Å and ... These compounds are isoelectronic to benzene. With the vacant p-orbital on the boron atoms, they may possess some aromatic ... Three-coordinate compounds of boron typically exhibit trigonal planar geometry, therefore the boroxine ring is locked in a ... Boroxine (B3H3O3) is a 6-membered, heterocyclic compound composed of alternating oxygen and singly-hydrogenated boron atoms. ...
National Pollutant Inventory - Boron and compounds WebBook page for BC6H15O3. ... Triethyl borate, also called boron triethoxide or boric acid, triethyl ester, is a colorless, flammable liquid with the formula ...
... , also known as sodium borate, sodium tetraborate, or disodium tetraborate, is an important boron compound, a mineral, and ... Borax can also be produced synthetically from other boron compounds. Naturally occurring borax (known by the trade name ... In this structure, there are two four-coordinate boron atoms (two BO4 tetrahedra) and two three-coordinate boron atoms (two BO3 ... as a precursor for other boron compounds, and along with its inverse, boric acid, is useful as an insecticide. In artisanal ...
Patnaik, Pradyot (2003). Handbook of Inorganic Chemical Compounds. McGraw-Hill. pp. 444-446. ISBN 0-07-049439-8. . Retrieved ... For the other group formerly named Group III (boron group), see Group 13 element. ... Heiserman, David L. (1992). "Element 39: Yttrium". Exploring Chemical Elements and their Compounds. New York: TAB Books. pp. ... Once reached a human, scandium concentrates in the liver and is a threat to it; some its compounds are possibly carcinogenic, ...
Inorganic or organic compounds that contain boron as an integral part of the molecule.. *Drugs ... This use is approved as this compound rapidly degrades to harmless byproducts.[T203]. ...
... of a transition metal compound such as a tetraalkoxy titanium compound and a boron compound such as a trialkyl boron compound ... Particularly suitable boron compounds include, for example, triethyl boron, triphenyl boron, diethyl boron chloride, boron ... of a transition metal compound such as a tetraalkoxy titanium compound and a boron compound such as a trialkyl boron compound ... of a transition metal compound such as a tetraalkoxy titanium compound and a boron compound such as a trialkyl boron compound ...
... The latest inorganic benzene has pronounced aromaticity by Mark Peplow ... A cunningly modified ring of boron and nitrogen atoms is the closest inorganic analog of benzene yet created, its creators say ... Unlike borazines alternating pattern of elements, diazatetraborinines ring includes four boron atoms that sit in pairs and ...
Boron-doped diamond (BDD) electrodes prepared by chemical vapor deposition were used to determine if phenol could be oxidized ... Boron-doped diamond (BDD) electrodes prepared by chemical vapor deposition were used to determine if phenol could be oxidized ... Electrochemical oxidation of organic compounds using boron-doped diamond electrodes. ECS Transactions, 45(17), 19-30. https:// ...
Attempts to produce boron-lithium, boron-magnesium, and [GDCh-Ortsverband Frankfurt/Main (Germany) boron-mercury compounds have ... Diboron, Polyboron, and Metal-Boron Compounds Diboron compounds BzX4 are readily accessible by dehalogenation of boron ... Diboron Polyboron and Metal-Boron Compounds.. код для вставки. код для вставки на сайт или в блог. Ширина: (. aвто. ). ... boron(ll1) and polyboron compounds are always formed. The increase in stability in the series B2Cl4, BzH(CH3)zIdMOCH ~)~,BzRz~ ...
Materials Chemistry and Boron Compounds Conference scheduled on May 13-14, 2021 in May 2021 in Amsterdam is for the researchers ... Boron compounds. Diboranes. Metal-boron compounds. B-H Activation. Organometallic chemistry. Homogeneous catalysis. Boron in ... Boron in Catalysis, Materials Chemistry and Boron Compounds. ICBCMCBC 2021: 15. International Conference on Boron in Catalysis ... International Conference on Boron in Catalysis, Materials Chemistry and Boron Compounds aims to bring together leading academic ...
... different boron-enriched compounds have been designed and developed. Efforts to circumvent the selectivity-uptake challenge and ... have been to driving force behind the medicinal chemistry field in boron-based compounds. In this regard, a wide diversity of ... This procedure requires the selective accumulation of boron into the tumoral cells, and due to this requirement, ... boron neutron capture therapy (BNCT) was a special type of radiotherapy for treatment of cancer and with focus mainly on glioma ...
Use MacRaesBlueBook.com for accurate listings of Boron Compounds, Not From Mines, NEC Chemicals Manufacturers in California. ... CHEMICALS: Silica Compounds. , CHEMICALS: Ammonium Compounds. , CHEMICALS: Ammonium Compounds, Exc Fertilizers, NEC. , ... CHEMICALS: Ammonium Salts & Compounds. , CHEMICALS: Nickel Compounds Or Salts, Inorganic. , CHEMICALS: Magnesium Compounds Or ... BLENDING: Chemical, Compounding. , CHEMICALS: Lithium Compounds, Inorganic. , CHEMICALS: Sodium & Potassium Compounds, Exc ...
Title: Boron, bismuth co-doping of gallium arsenide and other compounds for photonic and heterojunction bipolar transistor ... Patent: Boron, bismuth co-doping of gallium arsenide and other compounds for photonic and heterojunction bipolar transistor ... For example, Group III-V compounds and alloys, such as GaAs and GaP, are isoelectronically co-doped with, for example, B and Bi ... Isoelectronic co-doping of semiconductor compounds and alloys with acceptors and deep donors is sued to decrease bandgap, to ...
... ... boron, as the boron-based hydride acceptor akin to BBr3. Side reactions could be minimized by varying the reaction conditions. ...
... of compound biological effectiveness factors on the type and the concentration of administered neutron capture agents in boron ... To examine the effect of the type and the concentration of neutron capture agents on the values of compound biological ... effectiveness (CBE) in boron neutron capture therapy. After the subcutaneous administration of a (10) B-carrier, ...
... ... CitationFortuny, A. [et al.]. Effect of phase modifiers on boron removal by solvent extraction using 1,3 diolic compounds. " ... Efficiency of the diolic extractants for boron separation have been tested in the presence of different solvent modifiers. ... CONCLUSION: Quantitative removal of boron was achieved from industrial waste solutions such as a spent phosphate passivation ...
"Modification of siloxane coatings with boron and aluminum compounds, Russian Journal of Applied Chemistry" on DeepDyve, the ... Modification of siloxane coatings with boron and aluminum compounds. Modification of siloxane coatings with boron and aluminum ... Modification of siloxane coatings with boron and aluminum compounds. Khelevina, O. Add Journal to My Library Russian Journal of ... lp/springer_journal/modification-of-siloxane-coatings-with-boron-and-aluminum-compounds-pab5FwYakJ ...
Activities of poly-boron compounds were compared with 2APB, mono-boron and bis-boron com.. ... Inhibitory activities of 74 poly-boron compounds for SOCE and IICR were measured. ... bis-boron compounds), and Part 3 (poly -boron compounds). We have reported about mono-boron compounds [45] and bis-boron ... the mono-boron compounds and bis-boron compounds showed almost 10 times strong activity than poly-boron compounds. Poly-boron ...
Kartal SN, Shinoda K, Imamura Y (2005) Laboratory evaluation of boron-containing quaternary ammonia compound, didecyl dimethyl ... Performance of fluoride and boron compounds against drywood and subterranean termites and decay and mold fungi. ... Resistance of boron-treated wood (Virola spp) to insect and fungal attack. For Prod J 37(2):10-17Google Scholar ... Drysdale JA (1994) Boron treatments for the preservation of wood: A review of efficacy data for fungi and termites. ...
Structural studies of organoboron compounds .64. Boron chelate formation with glycolohydroxamic acids, and the crystal and ... Structural studies of organoboron compounds .64. Boron chelate formation with glycolohydroxamic acids, and the crystal and ... Structural studies of organoboron compounds .64. Boron chelate formation with glycolohydroxamic acids, and the crystal and ... BOND LENGTHS RELATIONS, crystal structure, HETERO-PI-SYSTEMS, hydroxamatoborate, HYDROXAMIC ACIDS, organoboron compound. ...
The products have superior leach resistance to water when compared to conventional treatment compounds. ... C01B35/00-Boron; Compounds thereof * C01B35/08-Compounds containing boron and nitrogen, phosphorus, oxygen, sulfur, selenium or ... SPECIALITY BORON PRODUCTS LLC Specialty Boron Products LLC Original Assignee. SPECIALITY BORON PRODUCTS LLC. Specialty Boron ... The calcium compound or compounds that are produced are placed in solution, and thereafter remain in solution. The compound or ...
Explore detailed TOC, tables and figures of Global Vinyl Boron Compound Market Research Report 2017. ... Request sample of market research report on Global Vinyl Boron Compound Market Research Report 2017. ... Part I Vinyl Boron Compound Industry Overview. Chapter One Vinyl Boron Compound Industry Overview. 1.1 Vinyl Boron Compound ... 17.1 Vinyl Boron Compound Market Analysis. 17.2 Vinyl Boron Compound Project SWOT Analysis. 17.3 Vinyl Boron Compound New ...
Overview Boron is the first element in Group 13 (IIIA) of the periodic table [1]. The periodic table [2] is a chart that shows ... BORON (REVISED) Note: This article, originally published in 1998, was updated in 2006 for the eBook edition. ... Boron also forms important compounds with two other elements, carbon and nitrogen. Boron carbide (B4C) and boron nitride (BN) ... Compounds of boron have been used for centuries. Borax, a boron compound, has long been used to make glass and glazes. The ...
Antonyms for Boron compounds. 2 synonyms for boron: atomic number 5, B. What are synonyms for Boron compounds? ... boron. (redirected from Boron compounds). Also found in: Dictionary, Medical, Encyclopedia.. Related to Boron compounds: boric ... Boron compounds synonyms, Boron compounds antonyms - FreeThesaurus.com https://www.freethesaurus.com/Boron+compounds ... 23, 2014 /PRNewswire/ -- Boron compounds are extremely valuable and versatile.. Boron Compounds (Borax, Boric Acid and Others) ...
The compounds were expected to have antimycobacterial activity due to the ability of boron to form charged, reversible ... The compounds were expected to have antimycobacterial activity due to the ability of boron to form charged, reversible ... Chemical syntheses of rationally-designed pyridine and pyrazine derivatives and boron-containing compounds for inhibition of ... Chemical syntheses of rationally-designed pyridine and pyrazine derivatives and boron-containing compounds for inhibition of ...
Three-center two-electron bonds are seen in many boron compounds, such as diborane (B2H6). The monomer BH3 is unstable since ... A B−H−B 3-center-2-electron bond is formed when a boron atom shares electrons with a B−H bond on another boron atom. In ... This type of bond also occurs in carbon compounds, where it is sometimes referred to as hyperconjugation; another name for ... each boron is surrounded by a stable octet. ... Boron compounds[edit]. Resonance structures of 3c-2e bond in ...
aminoethoxydiphenyl borate inhibits the reaction [[[GJB1 protein co-treated with GJB2 protein] results in increased gap junction-mediated intercellular transport] which results in increased susceptibility to Cisplatin ...
... AV Boron Nitrogen Compounds 1965. by Claud 4.1 ... My ephemeral Boron Nitrogen Compounds 1965, Ovid in Exile: re; Power and Poetic Redress in the Tristia and Epistulae ex Ponto, ... Entries (RSS) 50 Boron Nitrogen Compounds 1965 concerns, ad I occurred to share the lacking 50 change books, but invite-only ... 127 to 164 Boron Nitrogen Compounds First formed in this manuscript. Thiago SilvestreEditora Moderna - Bibliografia Geografia ...
  • Boron combines with oxygen in the air to form boron trioxide ( B 2 O 3 ). (encyclopedia.com)
  • Boron trioxide forms a thin film on the surface that prevents further reaction with oxygen. (encyclopedia.com)
  • Atomic structure and electron micrographs of ideal (top) and twinned (bottom) B 6 O. Green spheres are boron, red spheres are oxygen. (wikipedia.org)
  • In the environment, boron is present in the form of borate, combined with oxygen and other elements . (greenfacts.org)
  • A bis-NHC diboryne compound has been isolated at room temperature, and it is stable in absence of oxygen/moisture. (blogspot.com)
  • Compounds wherein the metal is bonded directly to the singly bonded chalcogen of a group, in which the X's are the same or diverse chalcogens (i.e., oxygen, sulfur, selenium, or tellurium), which group is additionally attached directly or indirectly to the six-membered hetero ring by nonionic bonding. (uspto.gov)
  • Compounds wherein the metal is bonded directly to a chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) which is attached directly or indirectly to the six-membered hetero ring by nonionic bonding. (uspto.gov)
  • Glassy boron oxide (g-B2O3) is thought to be composed of boroxol rings which are six-membered rings composed of alternating 3-coordinate boron and 2-coordinate oxygen. (wikipedia.org)
  • Boron monoxide (B2O) is a chemical compound of boron and oxygen. (wikipedia.org)
  • In these compounds the boron and oxygen form a triple bond prone to cyclotrimerization to boroxines. (wikipedia.org)
  • Due to the high affinity of boron for oxygen, these compounds do not occur in nature. (wikipedia.org)
  • The mechanism of dealkylation of tertiary alkyl ethers proceeds via the formation of a complex between the boron center and the ether oxygen followed by the elimination of an alkyl bromide to yield a dibromo(organo)borane. (wikipedia.org)
  • Compounds that contain C-O bonds each possess differing reactivity based upon the location and hybridization of the C-O bond, owing to the electron-withdrawing effect of sp-hybridized oxygen (carbonyl groups) and the donating effects of sp2-hybridized oxygen (alcohol groups). (wikipedia.org)
  • Compounds that contain sulfur exhibit unique chemistry due to their ability to form more bonds than oxygen, their lighter analogue on the periodic table. (wikipedia.org)
  • Calcium hexaboride is used in the manufacturing of boron-alloyed steel and as a deoxidation agent in production of oxygen-free copper. (wikipedia.org)
  • Elemental boron has been found in star dust and meteorites but does not exist in the high oxygen environment of Earth. (wikipedia.org)
  • Compositions consisting of the reaction product or complex resulting from the mixing of a transition metal compound such as a tetraalkoxy titanium compound and a boron compound such as a trialkyl boron compound are useful in the preparation of catalysts for polymerizing α-olefins exhibiting ultra-high. (google.com)
  • 4. The reaction product or complex of claims 1, 2, or 3 wherein component (a) is titanium tetraethoxide, titanium tetra-n-propoxide, titanium tetra-isopropoxide, titanium tetra-n-butoxide or titanium tetra-(2-ethylhexoxide) and component (b) is boron tribromide. (google.com)
  • As the rods are lowered into the core, the boron absorbs neutrons, slowing the reaction. (encyclopedia.com)
  • We have been trying to find reaction conditions that allow us to couple two different groups to the diboronated product of this reaction," says Uchiyama, "so that we can prepare compounds like Tamoxifen in a structurally selective fashion. (phys.org)
  • The four compounds in the series from chloro[subphthalocyaninato]boron(III) to chloro[subnaphthalocyaninato]boron(III) were synthesized in a one-pot reaction. (emich.edu)
  • The most common way is reaction of organometallic compounds based on lithium or magnesium (Grignards) with borate esters. (wikipedia.org)
  • For example, phenylboronic acid is produced from phenylmagnesium bromide and trimethyl borate followed by hydrolysis PhMgBr + B(OMe)3 → PhB(OMe)2 + MeOMgBr PhB(OMe)2 + H2O → PhB(OH)2 + MeOH Another method is reaction of an arylsilane (RSiR3) with boron tribromide (BBr3) in a transmetallation to RBBr2 followed by acidic hydrolysis. (wikipedia.org)
  • ce {K2CO3, Pd(PPh3)4}}][{\ce {dioxane}}] C6H5CH3}}} Another form of the Suzuki-Miyaura coupling reaction exhibits selectivity to aryl chlorides: Boroxines have also been examined as precursors to monomeric oxoborane, HB≡O. This compound quickly converts back to the cyclic boroxine, even at low temperatures. (wikipedia.org)
  • doi: 10.1007/BF00913599 M.A. Beckett, G.C. Strickland, J.R. Holland, and K.S. Varma, "A convenient NMR method for the measurement of Lewis acidity at boron centres: correlation of reaction rates of Lewis acid initiated epoxide polymerizations with Lewis acidity", Polymer, 1996, 37, 4629-4631. (wikipedia.org)
  • Because this reaction takes place in an aqueous conditions, compound E of general formula T8(OH)4 as a consequence of hydrolysis reaction was obtained. (wikipedia.org)
  • Illustrative is a reaction that give rise to alkene polymerization catalysts where tris(pentafluorophenyl)boron is used as an activator or cocatalyst: (C6F5)3B + (C5H5)2Zr(CH3)2 → [(C5H5)2ZrCH[(C6F5)3BCH In this process, the strongly coordinating methyl group transfers to the boron to expose a reactive site on zirconium. (wikipedia.org)
  • C6F5)3B was used to prepare a compound containing a Xe-C bond: (C6F5)3B + XeF2 → [C6F5Xe]+[(C6F5)2BF Upon reaction with pentafluorophenyllithium, the salt of the noncoordinating anion lithium tetrakis(pentafluorophenyl)borate is formed. (wikipedia.org)
  • The so-called anti-Markovnikov addition because when the boron is replaced with a hydroxyl group the overall reaction is addition of water over the double bond in what appears to be an anti-Makovnikov addition. (wikipedia.org)
  • Diboron Polyboron and Metal-Boron Compounds. (docme.ru)
  • Diboron, Polyboron, and Metal-Boron Compounds Diboron compounds BzX4 are readily accessible by dehalogenation of boron chlorides XzBCI provided at least one of the ligands X in XzBCl is a dimethylamino group: b) Acid-catalysed cyclization of P-alkoxydiazoketones yields 2-methyl- (5 4-methyl- (41 and 5-methyl- (30 %) tetrahydrofuran-3-ones. (docme.ru)
  • Disproportionation of mixed diboron compounds proceeds in a 121 (3) somewhat more complex manner than that according to (b), but here, too, boron(ll1) and polyboron compounds are always formed. (docme.ru)
  • The decomposition of the diboron compounds offers the best method available at present for the preparation of polyboron compounds. (docme.ru)
  • Synonyms include boroethane, boron hydride, and diboron hexahydride. (wikipedia.org)
  • For example, Bis(pinacolato)diboron (B2Pin2), and bis(catecholato)diborane (B2Cat2) are common boron sources of this general formula. (wikipedia.org)
  • Unlike some other diboron compounds, B2pin2 is not moisture-sensitive and can be handled in air. (wikipedia.org)
  • This compound may be prepared by reacting tetrakis(dimethylamino)diboron with pinacol in acidic conditions. (wikipedia.org)
  • Boron forms many subhalides, starting with B2X4, a representative member being diboron tetrafluoride. (wikipedia.org)
  • Armstrong TA, Spears JW, Crenshaw TD, Nielsen FH (2000) Boron supplementation of a semipurified diet for weanling pigs improve feed efficiency and bone strength characteristics and alters plasma lipid metabolites. (springer.com)
  • After two years at Imperial College London as Senior Lecturer and Reader he took up a Chair of Inorganic Chemistry at the Julius-Maximilians-University of Würzburg in 2002, and is now also the founding director of the Institute for Sustainable Chemistry & Catalysis with Boron (ICB). (wikipedia.org)
  • Although the uses of boron compounds in pharmacological science have been recognized several decades ago, surprisingly few are found in pharmaceutical drugs. (mdpi.com)
  • However, the improvement in the already existing (BPA and/or BSH) localized delivery agents or new tumor-targeted compounds are required before realizing the full clinical potential of BNCT. (mdpi.com)
  • Here, we have focused on the possible clinical implications of the new and improved boron-based biologically active compounds for BNCT that are reported to have in vivo and/or in vitro efficacy. (mdpi.com)
  • If pre-clinical studies under the CRADA agreement and subsequent clinical trials find the new compounds to be safe and effective, they may well be used in BNCT for the treatment of head and neck tumors and/or brain tumors. (bnl.gov)
  • The new boron compounds concentrate preferentially in tumors and destroy cancerous cells when they react with neutrons in BNCT. (bnl.gov)
  • Also, the tumor:blood boron concentration ratio was greater than 100:1, compared to only 3:1 for previous boron compounds used in BNCT. (bnl.gov)
  • This is without the use of boron compounds, chlorine, sulfur or phosphorous. (cnbc.com)
  • Besides novel binary and ternary boron-sulfur and boron-selenium compounds he developed new ionic conductors on the basis of lithium chalcogenoborates. (wikipedia.org)
  • Zhengtao Xu "Recent Developments in Binary Halogen-Chalcogen Compounds, Polyanions and Polycations" in Handbook of Chalcogen Chemistry: New Perspectives in Sulfur, Selenium and Tellurium, Francesco Devillanova, Editor, 2006, RSC. (wikipedia.org)
  • Hexaborides have B/M = 6 and form a three-dimensional boron framework based on a boron octahedron (Fig. 1a). (wikipedia.org)
  • It is obtained in the form of its compounds and never in its elemental state. (drugs.com)
  • These compounds could form the basis for a new class of drugs, the authors argue. (alzforum.org)
  • To examine this, they mixed a compound called poly(vinyl alcohol) (PVA) and BPA together, to form a PVA-BPA complex, and observed the internalization of this compound in cancer cells. (titech.ac.jp)
  • This compound then oxidized in air to form ethylboronic acid. (wikipedia.org)
  • Next, Braunschweig and his team hope to free this boron chain from its scaffold and increase the chain length to form the boron equivalent of polyethylene, a common plastic. (newscientist.com)
  • Some compounds termed orthoborates do not necessarily contain the trigonal planar ion, for example gadolinium orthoborate, GdBO3 contains the polyborate B 3O9− 9 ion, whereas the high temperature form contains planar BO3− 3. (wikipedia.org)
  • Until recently, it had been hypothesized that erbium hexaboride was unstable due to the small size of the Er3+ cation within the crystal structure when compared to the ionic radii of other rare-earth elements that form known rare-earth hexaboride compounds. (wikipedia.org)
  • The main group metals, lanthanides and actinides form a wide variety of boron-rich borides, with metal:boron ratios up to YB66. (wikipedia.org)
  • Carbon's abundance, its unique diversity of organic compounds, and its unusual ability to form polymers at the temperatures commonly encountered on Earth enables this element to serve as a common element of all known life. (wikipedia.org)
  • Borinate is the associated anion of boron with formula H 2BO− , however being a lewis acid the form in basic solution is H 2B(OH)− 2. (wikipedia.org)
  • Bu3B + N2CHCOR → BuCH=C(R)OBBu2 Bu3B + CH2=CHCOCH3 → BuCH2CH=C(CH3)OBBu2 RCOC2H5 + R2BOTf → RC(OBR2)=CHCH3 (Tf = Trifluoromethanesulfonate) [Z] enolate gives syn aldol when reacted with aldehyde, where as [E] enolate gives and anti aldol Dialkyl boron chloride (R2BCL) with tertiary amine react with ketones to form an enol borinate. (wikipedia.org)
  • The 1-methyl and 1-phenyl borinates can form some of the few organo-thallium(I) compounds. (wikipedia.org)
  • Iron borides can be formed by thermochemically reacting boron rich compounds on an iron surface to form a mixture of iron borides, in a process known as boriding. (wikipedia.org)
  • In special circumstances, boron can also be synthesized in the form of its α-tetragonal, and γ-orthorhombic allotropes. (wikipedia.org)
  • Moreover, boron has been suggested to be necessary for life to form. (wikipedia.org)
  • He hypothesized that if boron could be selectively concentrated in a tumoral tissue and then exposed to a neutrons beam, a higher radiation dose to the tumor relative to surrounding normal cells would result. (intechopen.com)
  • Boron compounds are also used in cementation of iron, as fibers and filaments in composites with metals or ceramics, in special-purpose alloys, for nuclear reactors, as a shield for nuclear radiation and in instruments used for detecting neutrons. (freethesaurus.com)
  • 4. The process of claim 1 wherein the organic compound containing at least 2 isocyanate radicals is selected from the group consisting of aliphatic, cycloaliphatic, araliphatic, aromatic and heterocyclic polyisocyanates and mixtures thereof. (google.com)
  • Study of the various classes of organic compounds, including substitutions in the aromatic nucleus, cyclic compounds, and natural products such as amino acids, carbohydrates and peptides. (gettysburg.edu)
  • The IUPAC Gold Book requires that Bis-, Tris-, etc. prefixes be used to describe homoaromatic compounds in which two, three, etc. sp3 centers separately interrupt conjugation of the aromatic system. (wikipedia.org)