Liquids that dissolve other substances (solutes), generally solids, without any change in chemical composition, as, water containing sugar. (Grant & Hackh's Chemical Dictionary, 5th ed)
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)
Six-carbon saturated hydrocarbon group of the methane series. Include isomers and derivatives. Various polyneuropathies are caused by hexane poisoning.
Compounds in which a methyl group is attached to the cyano moiety.
A widely used industrial solvent.
Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.
A colorless liquid used as a solvent and an antiseptic. It is one of the ketone bodies produced during ketoacidosis.
A colorless, flammable liquid used in the manufacture of FORMALDEHYDE and ACETIC ACID, in chemical synthesis, antifreeze, and as a solvent. Ingestion of methanol is toxic and may cause blindness.
Chlorinated ethanes which are used extensively as industrial solvents. They have been utilized in numerous home-use products including spot remover preparations and inhalant decongestant sprays. These compounds cause central nervous system and cardiovascular depression and are hepatotoxic. Include 1,1,1- and 1,1,2-isomers.
The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain).
A rigorously mathematical analysis of energy relationships (heat, work, temperature, and equilibrium). It describes systems whose states are determined by thermal parameters, such as temperature, in addition to mechanical and electromagnetic parameters. (From Hawley's Condensed Chemical Dictionary, 12th ed)
A chlorinated hydrocarbon that has been used as an inhalation anesthetic and acts as a narcotic in high concentrations. Its primary use is as a solvent in manufacturing and food technology.
A broad class of substances containing carbon and its derivatives. Many of these chemicals will frequently contain hydrogen with or without oxygen, nitrogen, sulfur, phosphorus, and other elements. They exist in either carbon chain or carbon ring form.
A commonly used laboratory solvent. It was previously used as an anesthetic, but was banned from use in the U.S. due to its suspected carcinogenicity.
The homogeneous mixtures formed by the mixing of a solid, liquid, or gaseous substance (solute) with a liquid (the solvent), from which the dissolved substances can be recovered by physical processes. (From Grant & Hackh's Chemical Dictionary, 5th ed)
Theoretical representations that simulate the behavior or activity of chemical processes or phenomena; includes the use of mathematical equations, computers, and other electronic equipment.
A low-energy attractive force between hydrogen and another element. It plays a major role in determining the properties of water, proteins, and other compounds.
The exposure to potentially harmful chemical, physical, or biological agents that occurs as a result of one's occupation.
A highly polar organic liquid, that is used widely as a chemical solvent. Because of its ability to penetrate biological membranes, it is used as a vehicle for topical application of pharmaceuticals. It is also used to protect tissue during CRYOPRESERVATION. Dimethyl sulfoxide shows a range of pharmacological activity including analgesia and anti-inflammation.
A family of isomeric, colorless aromatic hydrocarbon liquids, that contain the general formula C6H4(CH3)2. They are produced by the destructive distillation of coal or by the catalytic reforming of petroleum naphthenic fractions. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)
A chlorinated hydrocarbon used as an industrial solvent and cooling liquid in electrical transformers. It is a potential carcinogen.
Spectroscopic method of measuring the magnetic moment of elementary particles such as atomic nuclei, protons or electrons. It is employed in clinical applications such as NMR Tomography (MAGNETIC RESONANCE IMAGING).
The study of crystal structure using X-RAY DIFFRACTION techniques. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A highly volatile inhalation anesthetic used mainly in short surgical procedures where light anesthesia with good analgesia is required. It is also used as an industrial solvent. Prolonged exposure to high concentrations of the vapor can lead to cardiotoxicity and neurological impairment.
The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.
Salts that melt below 100 C. Their low VOLATILIZATION can be an advantage over volatile organic solvents.
The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH = log 1/2[1/(H+)], where (H+) is the hydrogen ion concentration in gram equivalents per liter of solution. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
The formation of crystalline substances from solutions or melts. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
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)
The rate dynamics in chemical or physical systems.
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.
Eight-carbon saturated hydrocarbon group of the methane series. Include isomers and derivatives.
An ethylene compound with two hydroxy groups (-OH) located on adjacent carbons. They are viscous and colorless liquids. Some are used as anesthetics or hypnotics. However, the class is best known for their use as a coolant or antifreeze.
Isomeric forms and derivatives of butanol (C4H9OH).
Alkyl compounds containing a hydroxyl group. They are classified according to relation of the carbon atom: primary alcohols, R-CH2OH; secondary alcohols, R2-CHOH; tertiary alcohols, R3-COH. (From Grant & Hackh's Chemical Dictionary, 5th ed)
A method of separation of two or more substances by repeated distribution between two immiscible liquid phases that move past each other in opposite directions. It is a form of liquid-liquid chromatography. (Stedman, 25th ed)
A phase transition from liquid state to gas state, which is affected by Raoult's law. It can be accomplished by fractional distillation.
The level of protein structure in which regular hydrogen-bond interactions within contiguous stretches of polypeptide chain give rise to alpha helices, beta strands (which align to form beta sheets) or other types of coils. This is the first folding level of protein conformation.
The characteristic three-dimensional shape of a molecule.
An isomer of 1-PROPANOL. It is a colorless liquid having disinfectant properties. It is used in the manufacture of acetone and its derivatives and as a solvent. Topically, it is used as an antiseptic.
A colorless liquid made by oxidation of aliphatic hydrocarbons that is used as a solvent and chemical intermediate.
Deuterium. The stable isotope of hydrogen. It has one neutron and one proton in the nucleus.
A computer simulation developed to study the motion of molecules over a period of time.
Computer-based representation of physical systems and phenomena such as chemical processes.
The facilitation of a chemical reaction by material (catalyst) that is not consumed by the reaction.
Determination of the spectra of ultraviolet absorption by specific molecules in gases or liquids, for example Cl2, SO2, NO2, CS2, ozone, mercury vapor, and various unsaturated compounds. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
The isotopic compound of hydrogen of mass 2 (deuterium) with oxygen. (From Grant & Hackh's Chemical Dictionary, 5th ed) It is used to study mechanisms and rates of chemical or nuclear reactions, as well as biological processes.
A group of amides with the general formula of R-CONH2.
Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.
Linear POLYPEPTIDES that are synthesized on RIBOSOMES and may be further modified, crosslinked, cleaved, or assembled into complex proteins with several subunits. The specific sequence of AMINO ACIDS determines the shape the polypeptide will take, during PROTEIN FOLDING, and the function of the protein.
The scattering of x-rays by matter, especially crystals, with accompanying variation in intensity due to interference effects. Analysis of the crystal structure of materials is performed by passing x-rays through them and registering the diffraction image of the rays (CRYSTALLOGRAPHY, X-RAY). (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
The accumulation of an electric charge on a object
The study of CHEMICAL PHENOMENA and processes in terms of the underlying PHYSICAL PHENOMENA and processes.
The thermodynamic interaction between a substance and WATER.
Diseases caused by factors involved in one's employment.
The parts of a macromolecule that directly participate in its specific combination with another molecule.
A change from planar to elliptic polarization when an initially plane-polarized light wave traverses an optically active medium. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Processes involved in the formation of TERTIARY PROTEIN STRUCTURE.
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.
A species of gram-positive bacteria in the family Clostridiaceae, used for the industrial production of SOLVENTS.
Measurement of the intensity and quality of fluorescence.
The generic name for the group of aliphatic hydrocarbons Cn-H2n+2. They are denoted by the suffix -ane. (Grant & Hackh's Chemical Dictionary, 5th ed)
The physical phenomena describing the structure and properties of atoms and molecules, and their reaction and interaction processes.
Hydrocarbon compounds with one or more of the hydrogens replaced by CHLORINE.
Air pollutants found in the work area. They are usually produced by the specific nature of the occupation.
The resistance that a gaseous or liquid system offers to flow when it is subjected to shear stress. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Disruption of the non-covalent bonds and/or disulfide bonds responsible for maintaining the three-dimensional shape and activity of the native protein.
Fractionation of a vaporized sample as a consequence of partition between a mobile gaseous phase and a stationary phase held in a column. Two types are gas-solid chromatography, where the fixed phase is a solid, and gas-liquid, in which the stationary phase is a nonvolatile liquid supported on an inert solid matrix.
Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
Chemistry dealing with the composition and preparation of agents having PHARMACOLOGIC ACTIONS or diagnostic use.
The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.
The study of PHYSICAL PHENOMENA and PHYSICAL PROCESSES as applied to living things.
The physical characteristics and processes of biological systems.
A four carbon linear hydrocarbon that has a hydroxy group at position 1.
The study of the structure, preparation, properties, and reactions of carbon compounds. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Stable elementary particles having the smallest known positive charge, found in the nuclei of all elements. The proton mass is less than that of a neutron. A proton is the nucleus of the light hydrogen atom, i.e., the hydrogen ion.
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.
The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments.
Pollution prevention through the design of effective chemical products that have low or no toxicity and use of chemical processes that reduce or eliminate the use and generation of hazardous substances.
A clear, colorless liquid rapidly absorbed from the gastrointestinal tract and distributed throughout the body. It has bactericidal activity and is used often as a topical disinfectant. It is widely used as a solvent and preservative in pharmaceutical preparations as well as serving as the primary ingredient in ALCOHOLIC BEVERAGES.
Derivatives and polymers of styrene. They are used in the manufacturing of synthetic rubber, plastics, and resins. Some of the polymers form the skeletal structures for ion exchange resin beads.
Spectrophotometry in the infrared region, usually for the purpose of chemical analysis through measurement of absorption spectra associated with rotational and vibrational energy levels of molecules. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

Molecular dynamics study of substance P peptides in a biphasic membrane mimic. (1/5113)

Two neuropeptides, substance P (SP) and SP-tyrosine-8 (SP-Y8), have been studied by molecular dynamics (MD) simulation in a TIP3P water/CCl4 biphasic solvent system as a mimic for the water-membrane system. Initially, distance restraints derived from NMR nuclear Overhauser enhancements (NOE) were incorporated in the restrained MD (RMD) in the equilibration stage of the simulation. The starting orientation/position of the peptides for the MD simulation was either parallel to the water/CCl4 interface or in a perpendicular/insertion mode. In both cases the peptides equilibrated and adopted a near-parallel orientation within approximately 250 ps. After equilibration, the conformation and orientation of the peptides, the solvation of both the backbone and the side chain of the residues, hydrogen bonding, and the dynamics of the peptides were analyzed from trajectories obtained in the RMD or the subsequent free MD (where the NOE restraints were removed). These analyses showed that the peptide backbone of nearly all residues are either solvated by water or are hydrogen-bonded. This is seen to be an important factor against the insertion mode of interaction. Most of the interactions with the hydrophobic phase come from the hydrophobic interactions of the side chains of Pro-4, Phe-7, Phe-8, Leu-10, and Met-11 for SP, and Phe-7, Leu-10, Met-11 and, to a lesser extent, Tyr-8 in SP-Y8. Concerted conformational transitions took place in the time frame of hundreds of picoseconds. The concertedness of the transition was due to the tendency of the peptide to maintain the necessary secondary structure to position the peptide properly with respect to the water/CCl4 interface.  (+info)

Molecular dynamics study of substance P peptides partitioned in a sodium dodecylsulfate micelle. (2/5113)

Two neuropeptides, substance P (SP) and SP-tyrosine-8 (SP-Y8), have been studied by molecular dynamics (MD) simulation in an explicit sodium dodecylsulfate (SDS) micelle. Initially, distance restraints derived from NMR nuclear Overhauser enhancements (NOE) were incorporated in the restrained MD (RMD) during the equilibration stage of the simulation. It was shown that when SP-Y8 was initially placed in an insertion (perpendicular) configuration, the peptide equilibrated to a surface-bound (parallel) configuration in approximately 450 ps. After equilibration, the conformation and orientation of the peptides, the solvation of both the backbone and the side chain of the residues, hydrogen bonding, and the dynamics of the peptides were analyzed from trajectories obtained from the RMD or the subsequent free MD (where the NOE restraints were removed). These analyses showed that the peptide backbones of all residues are either solvated by water or are hydrogen-bonded. This is seen to be an important factor against the insertion mode of interaction. Most of the interactions come from the hydrophobic interaction between the side chains of Lys-3, Pro-4, Phe-7, Phe-8, Leu-10, and Met-11 for SP, from Lys-3, Phe-7, Leu-10, and Met-11 in SP-Y8, and the micellar interior. Significant interactions, electrostatic and hydrogen bonding, between the N-terminal residues, Arg-Pro-Lys, and the micellar headgroups were observed. These latter interactions served to affect both the structure and, especially, the flexibility, of the N-terminus. The results from simulation of the same peptides in a water/CCl4 biphasic cell were compared with the results of the present study, and the validity of using the biphasic system as an approximation for peptide-micelle or peptide-bilayer systems is discussed.  (+info)

Specificity of native-like interhelical hydrophobic contacts in the apomyoglobin intermediate. (3/5113)

On exposure to mildly acidic conditions, apomyoglobin forms a partially folded intermediate, I. The A, B, G, and H helices are significantly structured in this equilibrium intermediate, whereas the remainder of the protein is largely unfolded. We report here the effects of mutations at helix pairing sites on the stability of I in three classes of mutants that: (i) truncate hydrophobic side chains in native helix packing sites, (ii) truncate hydrophobic side chains not involved in interhelical contacts, and (iii) extend hydrophobic side chains at residues not involved in interhelical contacts. Class I mutants significantly decrease the stability and cooperativity of folding of the intermediate. Class II and III mutants show smaller effects on stability and have little effect on cooperativity. Qualitatively similar results to those found in I were obtained for all three classes of mutants in native myoglobin (N), demonstrating that hydrophobic burial is fairly specific to native helix packing sites in I as well as in N. These results suggest that hydrophobic burial along native-like interhelical contacts is important for the formation of the cooperatively folded intermediate.  (+info)

A specific transition state for S-peptide combining with folded S-protein and then refolding. (4/5113)

We measured the folding and unfolding kinetics of mutants for a simple protein folding reaction to characterize the structure of the transition state. Fluorescently labeled S-peptide analogues combine with S-protein to form ribonuclease S analogues: initially, S-peptide is disordered whereas S-protein is folded. The fluorescent probe provides a convenient spectroscopic probe for the reaction. The association rate constant, kon, and the dissociation rate constant, koff, were both determined for two sets of mutants. The dissociation rate constant is measured by adding an excess of unlabeled S-peptide analogue to a labeled complex (RNaseS*). This strategy allows kon and koff to be measured under identical conditions so that microscopic reversibility applies and the transition state is the same for unfolding and refolding. The first set of mutants tests the role of the alpha-helix in the transition state. Solvent-exposed residues Ala-6 and Gln-11 in the alpha-helix of native RNaseS were replaced by the helix destabilizing residues glycine or proline. A plot of log kon vs. log Kd for this series of mutants is linear over a very wide range, with a slope of -0.3, indicating that almost all of the molecules fold via a transition state involving the helix. A second set of mutants tests the role of side chains in the transition state. Three side chains were investigated: Phe-8, His-12, and Met-13, which are known to be important for binding S-peptide to S-protein and which also contribute strongly to the stability of RNaseS*. Only the side chain of Phe-8 contributes significantly, however, to the stability of the transition state. The results provide a remarkably clear description of a folding transition state.  (+info)

The Enterococcus hirae copper chaperone CopZ delivers copper(I) to the CopY repressor. (5/5113)

Expression of the cop operon which effects copper homeostasis in Enterococcus hirae is controlled by the copper responsive repressor CopY. Purified Zn(II)CopY binds to a synthetic cop promoter fragment in vitro. Here we show that the 8 kDa protein CopZ acts as a copper chaperone by specifically delivering copper(I) to Zn(II)CopY and releasing CopY from the DNA. As shown by gel filtration and luminescence spectroscopy, two copper(I) are thereby quantitatively transferred from Cu(I)CopZ to Zn(II)CopY, with displacement of the zinc(II) and transfer of copper from a non-luminescent, exposed, binding site in CopZ to a luminescent, solvent shielded, binding site in CopY.  (+info)

Selecting near-native conformations in homology modeling: the role of molecular mechanics and solvation terms. (6/5113)

A free energy function, combining molecular mechanics energy with empirical solvation and entropic terms, is used for ranking near-native conformations that occur in the conformational search steps of homology modeling, i.e., side-chain search and loop closure calculations. Correlations between the free energy and RMS deviation from the X-ray structure are established. It is shown that generally both molecular mechanics and solvation/entropic terms should be included in the potential. The identification of near-native backbone conformations is accomplished primarily by the molecular mechanics term that becomes the dominant contribution to the free energy if the backbone is even slightly strained, as frequently occurs in loop closure calculations. Both terms become equally important if a sufficiently accurate backbone conformation is found. Finally, the selection of the best side-chain positions for a fixed backbone is almost completely governed by the solvation term. The discriminatory power of the combined potential is demonstrated by evaluating the free energies of protein models submitted to the first meeting on Critical Assessment of techniques for protein Structure Prediction (CASP1), and comparing them to the free energies of the native conformations.  (+info)

The magnitude of changes in guanidine-HCl unfolding m-values in the protein, iso-1-cytochrome c, depends upon the substructure containing the mutation. (7/5113)

Hydrophilic to hydrophobic mutations have been made at 11 solvent exposed sites on the surface of iso-1-cytochrome c. Most of these mutations involve the replacement of lysine with methionine, which is nearly isosteric with lysine. Minimal perturbation to the native structure is expected, and this expectation is confirmed by infrared amide I spectroscopy. Guanidine hydrochloride denaturation studies demonstrate that these variants affect the magnitude of the m-value, the rate of change of free energy with respect to denaturant concentration, to different degrees. Changes in m-values are indicative of changes in the equilibrium folding mechanism of a protein. Decreases in m-values are normally thought to result either from an increased population of intermediates during unfolding or from a more compact denatured state. When cytochrome c is considered in terms of its thermodynamic substructures, the changes in the m-value for a given variant appear to depend upon the substructure in which the mutation is made. These data indicate that the relative stabilities and physical properties of substructures of cytochrome c play an important determining role in the equilibrium folding mechanism of this protein.  (+info)

South African public sceptical about new AIDS "cure".(8/5113)


Browse detailed TOC, Tables, Figures, Charts and Companies mentioned in Aliphatic Hydrocarbon Solvents Market research report @ Table of Content Includes:. 1.Aliphatic Hydrocarbon Solvents Market Competition by Manufacturers. 2.Aliphatic Hydrocarbon Solvents Production, Revenue (Value), Price Trend by Type. 3.Aliphatic Hydrocarbon Solvents Manufacturing Cost Analysis. 4.Aliphatic Hydrocarbon Solvents Market Effect Factors Analysis. Further in the report, the Aliphatic Hydrocarbon Solvents market is examined for price, cost and gross. These three points are analysed for types, companies and regions. In continuation with this data sale price is for various types, applications and region is also included. The Aliphatic Hydrocarbon Solvents Industry for major regions is given. Additionally, type wise and application wise figures are also given.. Market Segment by Regions, this report splits ...
Solvent vapor annealing of block copolymer thin films can produce a range of morphologies different from the equilibrium bulk morphology. By systematically varying the flow rate of two different solvent vapors (toluene and n-heptane) and an inert gas, phase maps showing the morphology versus vapor pressure of the solvents were constructed for 45 kg/mol polystyrene-block-polydimethylsiloxane diblock copolymer films of different thicknesses. The final morphology was correlated with the swelling of the block copolymer and homopolymer films and the solvent vapor annealing conditions. Self-consistent field theory is used to model the effects of solvent swelling. These results provide a framework for predicting the range of morphologies available under different solvent vapor conditions, which is important in lithographic applications where precise control of morphology and critical dimensions are essential.. ...
Highly polar solvent-induced disproportionation of a cationic Pt(II)-diimine complex containing an o-semiquinonatoHighly polar solvent-induced disproportionation of a cationic Pt(II)-diimine complex containing an o-semiquinonato ...
Research Summary: The report presents detailed overview of the Solvent Compositions and Mixtures market in the world and regions (CIS countries in particular) by contemplating and analyzing its various parameters. Firstly, brief introduction is provided. Thus, solvent compositions and mixtures properties, application areas and manufacturing technologies are considered. Further goes the analysis of global solvent compositions and […].... ...
Background: Pesticides and organic solvents are two classes of neurotoxic substances regularly used in agriculture. Pesticides have been studied in relation to a range of nervous system effects, and have been repeatedly shown to relate to depression in agricultural workers. Likewise, occupational solvent exposure is recognized as a risk factor for central nervous system effects, including mood disturbances and cognitive impairment, across various industries. Many gaps in knowledge regarding the effects of chronic exposure to these substances on mental/neurological health in agricultural workers still exist. The specific aims of the current analysis were to 1.) Estimate associations between metrics of a.) pesticide exposure and b.) organic solvent exposure and results from the Center for Epidemiologic Studies Depression Scale of depressed mood; and 2.) Estimate associations between questionnaire-based organic solvent exposure metrics and measures of central nervous system function assessed from a battery
A solvent is a substance, that becomes a solution by dissolving a solid, liquid, or gaseous solute. A solvent is usually a liquid, but can also be a solid or gas. The most common solvent in everyday life is water.. Most other commonly-used solvents are organic (carbon-containing) chemicals. These are called organic solvents. Solvents usually have a low boiling point and evaporate easily or can be removed by distillation, thereby leaving the dissolved substance behind. Solvents should therefore not react chemically with the dissolved compounds - they have to be inert. Solvents can also be used to extract soluble compounds from a mixture, the most common example is the brewing of coffee or tea with hot water. Solvents are usually clear and colorless liquids and many have a characteristic smell. The concentration of a solution is the amount of compound that is dissolved in a certain volume of solvent. The solubility is the maximal amount of compound that is soluble in a certain volume of solvent at ...
New York City, NY: November 13, 2019 - Published via (Wired Release) - The industry analysis report identifying hidden opportunities of Aprotic Solvent Market, which will help to expand operations in the existing markets. The prime goal of the market study is to give a detailed assessment of the Aprotic Solvent business based on type, sector as well as geography. It also offers geological study into several regions with market growth, production, consumption, and revenue. An in-depth study examining the potential of the market and also offers data and estimates on the market structure, dynamics, and trends. The research report looks into growth strategies employed by key players, and how these strategies are poised to change the competitive dynamics in the aprotic solvent market over the forecast period.. Recent News Stories Shows How The Aprotic Solvent Market report presents a top to the bottom picture of product specification, innovation, product type, and production analysis considering ...
Aliphatic Hydrocarbon Solvents and Thinners Market Insights 2018, is a professional and in-depth study on the current state of the global Aliphatic Hydrocarbon Solvents and Thinners industry with a focus on the Global market. The report provides key statistics on the market status of the Aliphatic Hydrocarbon Solvents and Thinners manufacturers and is a valuable source of guidance and direction for companies and individuals interested in the industry. Overall, the report provides an in-depth insight of 2018-2025 global Aliphatic Hydrocarbon Solvents and Thinners market covering all important parameters. Request Sample…. Read More ...
Co-Solvent vapor degreasing is the long term cleaning process of the future.. Normal vapor degreasing uses a single solvent to clean and rinse parts. Because the solvent must be boiled in a single solvent vapor degreasing system only solvent with no flash points can be used.. Solvents with no flash points are found only in chemistries based in Chlorine, Bromine or Fluorine. While all of these can be used in vapor degreasers, they each face serious problems, which can be avoided in a co-solvent system.. Chlorinated solvents all have either environmental issues such as ozone depletion or low-level air pollution in the form of volatile organic compounds (VOCs) or heath issues being suspected carcinogens or reproductive hazards. Some industries such as electronics manufacturing avoid using chlorinated and brominated solvents during the manufacturing process.. Brominated solvents are also ozone depleters, VOCs, suspected carcinogens and reproductive hazards.. Fluorinated solvents are not ozone ...
TY - JOUR. T1 - Solvent-induced dimensional changes in EDTA-demineralized dentin matrix. AU - Pashley, D. H.. AU - Agee, K. A.. AU - Nakajima F R Tay, M.. AU - Carvalho, R. M.. AU - Terada, R. S.S.. AU - Harmon, F. J.. AU - Lee, W. K.. AU - Rueggeberg, F. A.. PY - 2001/6/21. Y1 - 2001/6/21. N2 - The purpose of this study was to test the null hypothesis that the re-expansion of dried matrix and the shrinkage of moist, demineralized dentin is not influenced by polar solvents. Dentin disks were prepared from mid-coronal dentin of extracted human third molars. After complete demineralization in 0.5M of EDTA (pH 7), the specimens were placed in the well of a device that measures changes in matrix height in real time. Dry, collapsed matrices were created by blowing dry N2 on the specimens until they shrank to a stable plateau. Polar solvents [water, methanol, ethanol, n-propanol, n-butanol, formamide, ethylene glycol, hydroxyethyl methacrylate (HEMA), or mixtures of water-HEMA] as model primers then ...
Solvent-induced two-photon absorption cross sections are calculated for a push-pull molecule in solutions using both self-consistent reaction field and internal finite field approaches. It is shown analytically and numerically that the results from the two methods can be connected through induced local reaction field factors. The two-photon cross sections of the studied push-pull polyene are found to be rather insensitive to the choice of cavity shape. The solvent dependence of the two-photon absorption displays a pattern different from that of the first hyperpolarizability.. ...
There is researched the process of low-temperature decomposition of vanadium-containing titanomagnetite in a non-aqueous solvent environment in the following system: monoatomic aliphatic alcohol ROH (R = C7–C8) — mineral acid (HCl). The process of titanomagnetite decomposition by a non-aqueous solvent is found to be affected by the aliphatic alcohol structure, acid concentration in the extract, and the non-aqueous phase and solid phase ratio. According to the influence efficiency on titanomagnetite, the researched alcohols are different in the following range: n-heptanol > n-octanol > iso-octanol. This correlates with the alcohols’ dielectric constant. During the titanomagnetite decomposition process in a non-aqueous environment, it is found that ferrous iron chloride and vanadium are concentrated in the one phase, ferric iron chloride — in the extract, and titanium — in the hardly decomposable mineral part. The stability of non-aqueous solvent in time has been
Unique Solvent Effects on Visible-Light CO2 Reduction over Ruthenium(II)-Complex/Carbon Nitride Hybrid PhotocatalystsUnique Solvent Effects on Visible-Light CO2 Reduction over Ruthenium(II)-Complex/Carbon Nitride Hybrid Photocatalysts ...
Note for Guidance on Impurities: Residual Solvents. The European Agency for the Evaluation of Medicinal Products Human Medicines Evaluation Unit. CPMP/ICH/283/95, March 1998, ICH Harmonised Tripartite Guideline Q3C. The limits for residual solvents given in Ph Eur, USP and JP are based on the Guidelines for Residual Solvents (CPMP/ICH/283/95, March 1998) which were adopted by the International Conference on Harmonization (ICH) for registration of pharmaceuticals for human use and prescribe limits for the content of solvents which may retain in active substances, excipients and medicinal products after processing. The residual solvents are listed in Appendix 1 by common names and structures. They were evaluated for their possible risk to human health and placed into one of three classes as follows:. Class 1 solvents: Known human carcinogens, strongly suspected human carcinogens, and environmental hazards. They are listed in Table 1.. Class 2 solvents (solvents to be limited): Non-genotoxic animal ...
Search results for inorganic solvents at Sigma-Aldrich Contact verified Inorganic Solvents Manufacturers, Inorganic Solvents suppliers, Inorganic Solvents exporters wholesalers, producers, traders in India. inorganic solvents list Wholesalers Directory - find Popular Products from 4 inorganic solvents list online Wholesalers from China. Chlorinated solvents are one of the contaminants most fre- are used to describe rates of transformation of inorganic chemicalspeciesinaqueoussolution . Q3D: Impurities: Guideline for Elemental Impurities . list of inorganic solvents Wholesalers Directory - find Popular Products from 0 list of inorganic solvents online Wholesalers from China. Acid-Base Reactions in Organic Solvents. Read about company and Inorganic Zinc coating provides anti-rust spray corrosion resistance for salt water & solvents for chemical plants, refineries, coastal & offshore installations. The most common solvent, water, is an example of an inorganic solvent. These are carbon based Pioneer ...
Theoretical studies on glycyl-alanyl and seryl dipeptides were performed to determine the probable backbone and side-group conformations that are preferred for solvent interaction. By following the method of Lee & Richards [(1971) J. Mol. Biol. 55, 379-400], a solute molecule is represented by a set of interlocking spheres of appropriate van der Waals radii assigned to each atom, and a solvent (water) molecule is rolled along the envelope of the van der Waals surface, and the surface accessible to the solvent molecule, and hence the solvent accessibility for a particular conformation of the solute molecule, is computed. From the calculated solvent accessibilities for various conformations, solvation maps for dipeptides were constructed. These solvation maps suggest that the backbone polar atoms could interact with solvent molecules selectively, depending on the backbone conformation. A conformation in the right-handed bridge (zetaR) region is favoured for both solvent interaction and intrachain ...
Using enrichment procedures, 45 organic solvent-tolerant lipase producer bacterial strains were screened from areas contaminated by oil and organic solvents. Among the strains, 15 isolates exhibited extreme stability toward organic solvents and high lipolytic activity. The NEB-1 isolate which was later identified as Pseudomonas sp. strain NEB-1 by biochemical tests and 16S rDNA gene sequence analysis was selected based on extremely high tolerance to organic solvents and maximum lipase production. Biochemical studies revealed that the crude lipase was stable at temperatures between 20 ºC and 60 ºC and pH ranges of 4 to 11 for 1 h. Optimum pH and temperature of the enzyme were revealed to be 9.5 and 70 ºC, respectively. The crude lipase showed remarkable tolerance in presence of different organic solvents with a broad range of hydrophobicity characteristics. The solvent stable lipase showed an attractive potency for application in biocatalysis in non-aqueous systems and biodiesel
article{cb52f0c6-0700-4b46-948b-c6b9df03eca7, abstract = {,p,Solvent effects on the decomposition of formic acid over a Co(111) surface were studied via density functional theory calculations combined with a continuum implicit solvation model. The solvents used here were water, methanol, and acetone. The adsorption energies of key intermediates, the activation barriers and the rate and equilibrium constants of various elementary reactions in vacuum and in the solvents were obtained. Solvent presences decrease the adsorption energies of species. Formic acid decomposition on the surface goes through HCOO rather than COOH both in vacuum and in the solvents. The most favorable decomposition pathways in vacuum and in acetone are HCOOH → HCOO → HCO → CO. The corresponding rate determining steps are HCOO deoxidation to HCO with activation barriers of 0.78 and 0.76 eV, respectively. In the presences of water and methanol, the preferred pathways are shifted to HCOOH → HCOO → HCOO-m → ...
Degree of crystallinity, crystal morphology, and crystallite size affect many physical properties of semi-crystalline polyesters, including mechanical strength, optical clarity, and biodegradability. Inspired by the literature related to solvent vapor annealing (SVA) in block copolymer films and solvent-induced crystallization in semi-crystalline polymers, we are studying how SVA treatments impact crystal morphology. Using poly(ε-caprolactone) as a model polymer for our studies, we have conducted in-situ grazing incidence wide-angle X-ray scattering experiments to determine when/if polymer crystals dissolve during solvent uptake and at what solvent concentrations recrystallization occurs during solvent removal. Additionally, we have examined polymer morphology across multiple length scales using a combination of optical microscopy, profilometry, and atomic force microscopy ...
Poly (caprolactone) (PCL) particles with the size distribution from 1 to 100 μm were prepared through solvent-induced phase separation, in which polyvinyl-alcohol (PVA) was used as the matrix-forming polymer to stabilize PCL particles. The cloud point data of PCL-acetone-water was determined by the titration method. PCL-acetone and PVA-water solutions, PCL-PVA gel, and PCL particles suspension were recorded by a digital camera. The morphology of PCL-PVA suspension and PCL particles were observed by optical microscopy and scanning electron microscopy, respectively. The size distribution of PCL particles was investigated by a particle size analyzer. Results from differential scanning calorimeter indicated that the main interaction between PCL and PVA were mediated through hydrogen bonding ...
Resonance Raman spectroscopy was used to probe the effect of solvent polarity on the molecular structure and isomerization dynamics of $4-nitro-4^\prime -dimethylaminoazobenzene$ (DA). In addition, the influence of the polarity and the relaxation behavior of the solvent on the mode-specific vibrational and solvent reorganization energies was investigated. Raman spectra were recorded in solvents with different polarity parameters, n-hexane and benzene, using 11 excitation wavelengths in the range 450-550 nm, scanning every 10 nm using the tunable laser pulse output of an optical parametric oscillator. It was observed that the solvent polarity plays a major role in influencing the excited-state potential energy surfaces of DA. The plot of resonance Raman intensities versus excitation wavelength (Raman excitation profiles) of the Franck-Condon-active fundamentals of DA shows that in n-hexane, the locally excited state is more favorable than that in benzene where the charge-transfer state is more ...
Preface. 1. Modern theories of continuum models.. 1.1 The physical model (J. Tomasi).. 1.2 Integral equation approaches for continuum models (E. Cances).. 1.3 Cavity surfaces and their discretization (C. Pomelli).. 1.4 A Lagrangian formulation for continuum models (M. Caricato, G. Scalmani, M. Frisch).. 1.5 The quantum mechanical formulation of continuum models (R. Cammi).. 1.6 Nonlocal solvation theories (V. Basilevsky & G.N. Chuev).. 1.7 Continuum models for excited states (B. Mennucci).. 2. Properties and spectroscopies.. 2.1 Computational modeling of the solvent effect on NMR molecular parameters by a Polarizable Continuum Model (J. Sadlej & M. Pecul).. 2.2 EPR spectra of organic free radicals in solution from an integrated computational approach (V. Barone, P. Cimino & M. Pavone).. 2.3 Continuum Solvation Approaches to Vibrational Properties (C. Cappelli).. 2.4 Vibrational Circular Dichroism (P. Stephens & F.J. Devlin).. 2.5 Solvent effects on natural optical activity (M. Pecul & K. ...
This study indicates that maternal occupational exposure to solvents may be associated with higher rates of ASD in their children. These results should be interpreted with caution given that this association did not remain significant after correcting the P-values for multiple comparisons. However, these results are consistent with earlier reports that have identified solvents as a potential risk factor for ASD.5 9 28 Research in the non-ASD population has found that solvents can be absorbed into the blood via skin or lungs.29 Water-soluble solvents may be cleared out of the body in urine or faeces, but many solvents are retained in organs including the brain. Solvents can also be metabolised into more toxic secondary substances (eg, methyl-butyl ketone, n-hexane) that are associated with a number of neurological effects and changes.29 In infants, solvents have been found to interfere with the glial guidance process which inhibits neuritic outgrowth.30 Infants of mothers who have been exposed to ...
In this work, we have investigated theoretically the structure/hyperpolarizability correlations of push-pull molecules sing a two-form two-state model. For this, we have defined a parameter MIX characterizing the mixing between the two-limiting resonance forms and thus ruling the molecular structure and polarization. Also, we have analyzed the solvent effect on the structure and on the polarizabilities of push-pull molecules using the Onsager reaction field theory. We have shown that the dependences of the linear and nonlinear polarizabilities on the solvent dielectric constant look similar to the structure/(hyper)polarizability correlations. Finally, we have investigated experimentally the solvent effect on a series of push-pull polyenes of increasing length. In particular, we have determined the scalar (mu) g(Beta) (0) product (where (mu) g is the ground-state dipole and (Beta) (0) the vector part of static quadratic hyperpolarizability tensor) in different solvents using the ...
Within the framework of the Peyrard-Bishop model for DNA melting, sharp denaturation temperature profiles can currently be obtained only if anharmonic base-pair stacking interactions are considered. We show that, when solvent interactions are included, a sharp denaturation of the DNA double helix is obtained without the need for anharmonic nearest-neighbor interactions. Using the concept of pseudo-Schrodinger equations we discuss the analogy of these transition to quantum-mechanical tunneling, and in particular we show that the sharp transitions are similar to resonant tunneling.. Full text not available from this repository.. ...
This multicentre case-control study of 1906 cases and 5565 controls provides no evidence of any association between occupational exposure to organic solvents and meningioma in the overall study population or in women or men separately. There were also no significant trends of increasing risk with either increasing cumulative exposure or duration of exposure. However, interpretation of these negative findings should take into account the strengths and limitations of the study.. While the INTEROCC study is the largest case-control study conducted to date investigating associations between occupational exposure to organic solvents and meningioma, the relatively low-exposure prevalence in the study population limited its power to identify significant associations and in particular after stratification by gender. Potential sources of selection and recall bias in the design and conduct of the INTERPHONE study on which this study was based have been addressed in detail elsewhere;28 ,36 however, these ...
India Market Study on Solvents. Industrial solvents are compounds where a solute is dissolved to create a solution. Solvents can either be organic or inorganic and the former is further subdivided into three types - oxygenated solvents, hydrocarbon solvents, and halogenated solvents. We have conducted an in-depth study of the India solvents m
The solvent effect on the self-assembly of polystyrene (PS) colloidal spheres for the fabrication of colloidal crystals (CCs) using the horizontal deposition method was investigated. Solvents containing water and ethanol of different volume fractions were examined. Samples were characterized using scanning electron microscopy and UV-vis-near-infrared spectroscopy techniques. It was found that the surface morphology and local structure of the CCs were significantly affected by the solvent. It was also observed that by adding minute quantity of a tetraethyl orthosilicate sol into the colloidal suspension, well ordered three-dimensional PS CCs without cracks were obtained. Experimental conditions were optimized and high-quality CCs in larger domains were fabricated with PS spheres as big as 2 μm in diameter. The success in fabricating CCs using colloidal spheres larger than 1.5 μm in diameter represents a significant work, especially when applications in photonics and tissue engineering are ...
Solvent programmable polymers (SPPs) were developed based on restricted rotation with the ability to respond and remember the stimuli-induced properties. The SPP was prepared via Ring Opening Metathesis Polymerization (ROMP). The recognition properties of SPPs can be modulated by heating in different solvents. At elevated temperatures, the carboxylic acid recognition groups have free rotation and can switch their relative orientations in response to the solvent. On cooling to room temperature, these solvent-induced changes were saved due to restricted rotation about the Caryl-Nimide bonds. Thus, the orientation of the carboxylic acid groups were maintained even when the imprinting solvent is removed or exchanged. The solvent-induced changes are also reversible, and the binding properties can be modulated by cycling between heating the polymer in a polar and nonpolar solvent. The solvent responsive behavior will fall off with |50% crosslinking. Thermodynamic studies showed large enthalpic terms and very
Polar solvents are distinguished by their large partial charges, as opposed to nonpolar solvents, which are more electrically neutral. Chemists recognize two groups of polar solvents, protic and...
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A variety of environmental factors affect fluorescence emission, including interactions between the fluorophore and surrounding solvent molecules (dictated by solvent polarity). This interactive tutorial explores relaxation effects and associated spectral shifts that occur as a function of solvent polarity.
In order to make the model more computationally efficient it has to be simplified. First and most natural simplification concerns the treatment of the solvent. In contrast to explicit solvent, which treats every water molecule in atomic detail, implicit solvent represents the effect of water molecules through effective potentials acting on the protein. As a consequence, a large reduction in the total number of degrees of freedom in the simulated system is achieved. In the present work, simulations with implicit solvent model ran about five times faster than the equivalent explicit solvent model, allowing us to extend the total simulation time by that amount. Another benefit of treating solvent implicitly is accelerated conformational dynamics of the protein. In explicit solvents, the dynamics of solute molecules is controlled by the solvents viscosity or internal friction. The magnitude of the friction is used as a parameter in implicit solvent simulations and thus can be varied to obtain ...
Recent estimates by the pharmaceutical and fine chemical industry have suggested solvents account for the majority of the waste produced in a typical batch process. Solvents are also subject to a number of regulatory controls. For these reasons there has been a large amount of interest in ways to reduce hazardous solvent use and find benign substitutes.. The Alternative Solvents technology platform promotes the use of more sustainable solvents - supercritical / liquid CO2, bio-based solvents and solvents made from waste - as replacements for conventional organic solvents. Here lies an opportunity to reduce the environmental impact of industrial processes as well as making them safer.. Our goal is to develop, apply and promote the implementation of safer, greener and more sustainable solvents into industry. The platform focuses on the use of alternative solvents in a wide range of applications.. Some of the applications already developed using supercritical or bio-based solvents include:. ...
Non-aqueous solvents are removed from a substrate, e.g., paper, by contacting the substrate with a condensable, vaporous heat transfer medium that is in a superheated state, e.g., superheated steam, and maintaining said substrate in contact with said superheated heat transfer medium, while also maintaining said heat transfer medium in superheated state, for a period of time sufficient to effect removal of said non-aqueous liquid from said substrate without concomitant condensation of said superheated heat transfer medium thereon. The superheated heat transfer medium, as well as being the source of energy for evaporating the solvent, acts as a solvent vapor transport medium. Upon evaporation of the solvent, the solvent vapor-heat transfer medium mixture can be sent to a recovery zone to easily recover said solvent via condensation of the mixture and thereby avoid the discharge of said solvent vapors into the atmosphere.
Oxidative cyclizations of a variety of heteroatom nucleophiles onto unactivated olefins are catalyzed by palladium(II) and pyridine in the presence of molecular oxygen as the sole stoichiometric oxidant in a nonpolar solvent (toluene). Reactivity studies of a number of N-ligated palladium complexes show that chelating ligands slow the reaction. Nearly identical conditions are applicable to five different types of nucleophiles: phenols, primary alcohols, carboxylic acids, a vinylogous acid, and amides. Electron-rich phenols are excellent substrates, and multiple olefin substitution patterns are tolerated. Primary alcohols undergo oxidative cyclization without significant oxidation to the aldehyde, a fact that illustrates the range of reactivity available from various Pd(II) salts under differing conditions. Alcohols can form both fused and spirocyclic ring systems, depending on the position of the olefin relative to the tethered alcohol; the same is true of the acid derivatives. The racemic ...
Kinetic solvent effects on hydroxylic hydrogen atom abstractions are independent of the nature of the abstracting radical. Two extreme tests using vitamin E and phenol
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In a study of the solvent effect on the α-effect, second-order rate constants (kNu-) have been determined spectrophotometrically for reactions of a series of substituted phenyl acetates with butan-2,3-dione monoximate (Ox-, α-nucleophile) and p-chlorophenoxide (p-ClPhO-, reference nucleophile) in DMSO-H2O (DMSO = dimethyl sulfoxide) mixtures of varying compositions at 25.0 ± 0.1 °C. The magnitude of the α-effect, kOX-/k p-ClPhO-, increases as the DMSO content in the medium increases up to 40-50 mol %, reaching 500, one of the largest α-effect values, and then decreases on further addition of DMSO, resulting in a bell-shaped α-effect profile regardless of the nature of the substrates. The magnitude of the α-effect is found to be significantly dependent on the substrates (or, more quantitatively, on βnuc). Thus, βnuc is an important predictor of the magnitude of the α-effect. The bell-shaped α-effect profile found in the present system is attributed to the differential change in the ...
TY - JOUR. T1 - Ultrafast measurements of the dynamics of solvation in polar and non-dipolar solvents. AU - Gardecki, J.. AU - Horng, M. L.. AU - Papazyan, A.. AU - Maroncelli, Mark. PY - 1995/1/1. Y1 - 1995/1/1. N2 - The dynamics of solvation of the probe solute coumarin 153 has been measured with ∼ 100 fs time resolution using the fluorescence upconversion technique. A wide variety of solvents, including polar aprotic solvents, hydrogen bonding solvents, and non-dipolar solvents have been examined. For all solvents of even moderate polarity (ε{lunate}0,5), the solvation dynamics observed follows the predictions simple models based on the solvents bulk dielectric response. For a number of non-dipolar solvents such as dioxane and benzene, for which ε{lunate}10,5, we observe surprisingly large time-dependent shifts, which seem to reflect the solute interacting with the large quadrupole (and higher multipole) moments of the solvent molecules. These dynamics represent a solvation distinct ...
A micellar acidic surfactant solvent composition of enhanced oil/organic solvency and method of preparing and using same. The oil solvency of a propoxylated/ethoxylated surfactant and alcohol micellar acidizing system is enhanced by controlling or selecting the molar ratio of alcohol to surfactant as a linearly increasing function of acid concentration. The oil solvency is further enhanced and selectively controlled by addition of an oil solvent (e.g., aromatic hydrocarbons, aromatic acid esters, ketones, CS2, etc.) to the micelle.
Aqueous amine solutions are the most used solvents for chemical absorption of CO2. Substituting part of the water by organic solvents in aqueous amine solutions aims to take advantage of the lower partial pressure and higher CO2 solubility. In this work, the influence of four organic solvents on solution density, viscosity, N2O solubility and absorption kinetics are studied. The organic solvents, Monoethylene Glycol (MEG), Diethylene Glycol (DEG), Triethylene Glycol (TEG) and CARBITOL, are blended with two amine solutions: MEA and DEEA-MAPA blend. The results show that the addition of organic solvents increases the density and viscosity. Furthermore, the N2O solubility, used to estimate the physical solubility of CO2 into a reactive system, increases when part of the water is substituted with an organic solvent. The kinetic experiments with a double stirred cell showed that in case of aqueous 5 M MEA, the substitution of part of the water increases both the mass transfer and kinetic coefficients ...
Global Aprotic Solvents Market to Reach US$21.8 Billion by the Year 2027 Amid the COVID-19 crisis, the global market for Aprotic Solvents estimated at US$17.1 ...
The rate of absorption of CO2 into amines in hydrophilic and hydrophobic solvent mixtures was studied in this work using a stopped-flow apparatus and a stirred-tank reactor. Monoethanolamine (MEA, primary amine) and N-methyl benzylamine (NMBZA, aromatic secondary amine) are chosen for this study and diluted in hydrophobic or hydrophilic solvents at different temperatures
Protein 3D structures, determined largely by their amino acid sequences, have been considered as an essential factor for better understanding the function of proteins [1-3]. However, it is exceedingly difficult to directly predict proteins 3D structures from amino acid sequences [4]. Identifying structure properties, such as secondary structure, solvent accessibility or contact number can provide useful insights into the 3D structures [5-7]. Accurate prediction of structural characteristics from the primary sequence is a crucial intermediate step in protein 3D structure prediction [8, 9].. The solvent accessibility (solvent accessible surface area) is defined as the surface region of a residue that is accessible to a rounded solvent while probing the surface of that residue [10]. Solvent burial residues have a particularly strong association with packed amino acids during the folding process [11], and exposed residues give a useful insight into protein-protein interactions and protein stability ...
Rate constants have been measured for the reaction of the light hydrogen isotope muonium with benzene and 2,3-dimethylbutadiene-1,3 in the gas phase and in several solvents. Comparison with H atom data reveals (1) appreciable kinetic isotope effects, (2) a strong contribution of tunnelling for the activated reaction with benzene, (3) encounter controlled reaction for Mu addition to the diene, (4) a mass dependence of the diffusion constant of hydrogen isotopes in solution, and (5) an enhancement of the rate constant in solution over that in the gas phase by a factor, except for water, of the inverse Ostwald solubility coefficient for hydrogen. The isotope-dependent reduction of the solvent effect in water is tentatively ascribed to the dynamics of the clathrate-like structure when the hydrogen atom reacts.. ...
Coordinative halogen bonds have recently gained interest for the assembly of supramolecular capsules. Ion mobility-mass spectrometry and theoretical calculations now reveal the well-defined gas-phase structures of dimeric and hexameric [N⋯I+⋯N] halogen-bonded capsules with counterions located inside their cavities as guests. The solution reactivity of the large hexameric capsule shows the intriguing solvent-dependent equilibrium between the hexamer and an unprecedented pentameric [N⋯I+⋯N] halogen-bonded capsule, when the solvent is changed from chloroform to dichloromethane. The intrinsic flexibility of the cavitands enables this novel structure to adopt a pseudo-trigonal bipyramidal geometry with nine [N⋯I+⋯N] bonds along the edges and two pyridine binding sites uncomplexed. ...
substrates. This ebook seeks to reinforce our figuring out of acids and bases through reviewing and analysing their behaviour in non-aqueous solvents. The behaviour is expounded the place attainable to that during water, yet correlations and contrasts among solvents also are presented.. Fundamental historical past fabric is supplied within the preliminary chapters: quantitative features of acid-base equilibria, together with definitions and relationships among resolution pH and species distribution; the impact of molecular constitution on acid strengths; and acidity in aqueous answer. Solvent houses are reviewed, in addition to the significance of the interplay energies of solvent molecules with (especially) ions; the power of solvents to take part in hydrogen bonding and to just accept ...
It is known that solvent and solvent effect play an important role in many catalytic reactions. Here the effects of solvent on acid catalyzed glucose conversion to HMF were investigated. Ab initio molecular dynamics and metadynamics simulations were used to investigate the reaction mechanisms and associated barriers in various water/DMSO mixtures. The multi-dimensional free energy surfaces (FES) obtained allows accurate determination of both the reaction free energies and barriers in different solvent systems. In addition, complementary experiments were carried out to determine the HMF yields and validate the effects of solvents on sugar reactions. Solvent is found to play a critical role during proton catalyzed sugar reactions. Solvent affects reaction pathways and associated barriers significantly. The thermodynamic equilibrium and the kinetic reaction rate constants were also determined and compared with available experimental data ...
The design of novel solvents for process improvements has stemmed much interest in recent years (Bardow et al., 2010, Folić et al., 2007, Oyarzun et al., 2011). Solvents are used in many industrial processes for separation of useful products from a feed. Consequently improvements in solvent performance are sought after for a more efficient and cost effective process. The properties desired in a solvent vary from process to process and include selectivity, volatility, flammability, toxicity, viscosity, heat capacity and reaction kinetics. Often a trade-off has to be reached between the desired properties as not all desired properties may be achievable within one solvent.. In order to optimize system performance, both process and solvent parameters must be optimized. The simultaneous optimization of a process and solvent is a challenging task. Although process parameters may be continuously optimized, solvent properties are discrete and therefore pose a major hurdle in the optimization process. ...
"Solvents Has New Head". Plain Dealer. December 1, 1947. p. 13. Retrieved 18 February 2017. Directors of Commercial Solvents ... The Commercial Solvents Corporation was established at the end of World War I; earning distinction as the pioneer producer of ... Commercial Solvents Corporation (CSC) was created in 1919. The corporation had started in Terre Haute as early as 1917 to ... "Solvents Heads Resigns; Goes to Banking Firm". Seattle Daily Times. July 18, 1928. p. 29. Retrieved 13 January 2018. Philip G. ...
" Solvent 646 Characteristics (ru)". " Solvent 647 Characteristics (ru)". " Solvent 648 Characteristics (ru ... Solvent selection tool ACS Green Chemistry Institute "European Solvents Industry Group - ESIG - ESIG European Solvents Industry ... A solvent is usually a liquid but can also be a solid, a gas, or a supercritical fluid. Water is a solvent for polar molecules ... Mixtures of solvent vapors and air can explode. Solvent vapors are heavier than air; they will sink to the bottom and can ...
Category:Alcohol solvents Solvent miscibility table [1] Diethylenetriamine [2] Hydrazine [3] (Articles with short description, ... The following compounds are liquid at room temperature and are completely miscible with water; they are often used as solvents ... Short description is different from Wikidata, Chemistry-related lists, Solvents). ...
In chemistry, solvent effects are the influence of a solvent on chemical reactivity or molecular associations. Solvents can ... Solvents can affect rates through equilibrium-solvent effects that can be explained on the basis of the transition state theory ... The ionization equilibrium of an acid or a base is affected by a solvent change. The effect of the solvent is not only because ... Polar solvents stabilize the reactants to a greater extent than the non-polar-solvent conditions by solvating the negative ...
... techniques are particularly important in protein NMR where the solvent often includes H2O as well as D2O. ... Solvent suppression is any technique in nuclear magnetic resonance spectroscopy (NMR) to decrease undesired signal from a ... The signal from the solvent can overwhelm that of the solute, and the NMR instrument may not collect any meaningful data. ... In liquid-state NMR spectroscopy, the sample to be studied is dissolved in a solvent. Typically, the concentration of the ...
e.g. Solvent Red 24, Solvent Red 26, Solvent Red 164, Solvent Yellow 124, Solvent Blue 35, etc. Red and yellow solvent dyes are ... A solvent dye is a dye soluble in organic solvents. It is usually used as a solution in an organic solvent. Solvent dyes are ... They form a colloidal solution in solvents. They have poor (basic dyes) to good (metal complex based) light fastness. Solvent ... Names of solvent dyes are often generic, of the scheme "solvent ", ...
... any solvent that contains a labile H+ is called a protic solvent. The molecules of such solvents readily donate protons (H+) to ... In chemistry, a protic solvent is a solvent that has a hydrogen atom bound to an oxygen (as in a hydroxyl group −OH), a ... Water is the most common protic solvent. Conversely, polar aprotic solvents cannot donate protons but still have the ability to ... John R. Rumble (ed.). "Laboratory Solvent Solvents and Other Liquid Reagents". CRC Handbook of Chemistry and Physics, 102nd ...
Implicit solvents or continuum solvents, are models in which one accepts the assumption that implicit solvent molecules can be ... RISM allows the solvent density to fluctuate in a local environment, achieving a description of the solvent shell behaviour. QM ... Implicit solvent models have been applied to model the solvent in computational investigations of reactions and to predict ... No explicit solvent molecules are present and so explicit solvent coordinates are not given. Continuum models consider ...
Some carts for transporting containers of chemicals come equipped with a built in solvent cabinet). A solvent cabinet must ... for the storage of solvents (especially those that are combustible). A solvent cabinet should be positioned separately from ... In a chemistry laboratory a solvent cabinet is a chemical storage cabinet or cupboard which is properly labeled and equipped, ... acid cabinet or base cabinet (used for storing acids and caustic bases respectively, as solvents are not compatible with these ...
When B > 0, the solvent is "good," and when B < 0, the solvent is "poor". For a theta solvent, the second virial coefficient is ... In a polymer solution, a theta solvent (or θ solvent) is a solvent in which polymer coils act like ideal chains, assuming ... A solvent at this temperature is called a theta solvent. In general, measurements of the properties of polymer solutions depend ... For a good solvent, interactions between polymer segments and solvent molecules are energetically favorable, and will cause ...
... occurs when a chemical, material, or person comes into contact with a solvent. Chemicals can be dissolved in ... the solvent exposure of an amino acid in a protein measures to what extent the amino acid is accessible to the solvent (usually ... and people can develop certain ailments from exposure to solvents both organic and inorganic. Some common solvents include ... Solvent exposure can be numerically described by several measures, the most popular measures being accessible surface area and ...
Liquid solvents are safer to deal with than vapor degreasing agents. There is a high danger of fire when using petroleum and ... Solvent degreasing is a process used to prepare a part for further operations such as electroplating or painting. Typically it ... Solvent degreasing equipment is available in a wide variety of sizes and shapes and mainly consists of a submersion tank. ... The part is immersed in a tank of solvent and usually agitated like a washing machine for clothes to get all of the contaminant ...
... may refer to: Water, described as the "universal solvent" for its ability to dissolve many substances ... a hypothetical solvent able to dissolve every other substance The Universal Solvent, a comic by Don Rosa This disambiguation ... page lists articles associated with the title Universal solvent. If an internal link led you here, you may wish to change the ...
Solvent homepage Solvent at Discogs Solvent at Morr Music Records Comer, M. Tye (22 November 1999). "RPM" (PDF). CMJ New Music ... 1998 Solvent 1999 Solvently One Listens 2001 Solvent City 2004 Apples + Synthesizers 2005 Elevators + Oscillators 2007 ... Solvent is the stage name used by electronic producer and remixer Jason Amm. Although his music has been included in the ... Aside from tracks appearing on various-artists compilations, Amm has released several full-length albums using the Solvent ...
... can be performed using a liquid or gas solvent. Liquid solvents are simpler and generally have lower ... Solvent dispenser method. A dispenser is used to precisely control the amount of solvent applied on each surface. The proper ... Solvent bonding is one of several methods of adhesive bonding for joining plastics. Application of a solvent to a thermoplastic ... A surface to be joined is dipped into a vat of solvent, with the solvent depth being a controlled variable, for a set amount of ...
... "solvent", a song on the 2013 Skinny Puppy album Weapon Solvation Solvent cabinet Solvent exposure Solvent extraction This ... Look up solvent or solvency in Wiktionary, the free dictionary. Solvent may refer to: Solvent, a liquid that dissolves another ... "Solvent", a song on the 1984 Skinny Puppy album Remission " ... material Solvent (producer), the stage name of electronic ... disambiguation page lists articles associated with the title Solvent. If an internal link led you here, you may wish to change ...
... , also known as bulk transport, refers to solutes in the ultrafiltrate that are transported back from the renal ...
A quantum solvent is essentially a superfluid (aka a quantum liquid) used to dissolve another chemical species. Any superfluid ... Such solvents are currently under investigation for use in spectroscopic techniques in the field of analytical chemistry, due ... quantum solvents could be used as tools in nanoscale chemical engineering, perhaps to manufacture components for use in ... Solvents, Nanotechnology, Chemical physics, Superfluidity, All stub articles, Nanotechnology stubs, Quantum physics stubs). ...
Deuterated solvents are a group of compounds where one or more hydrogen atoms are substituted by deuterium atoms. These ...
"Accelerated Solvent Extraction - Dionex Solvent Extractors". Retrieved 11 September 2020. "Accelerated ... After adding the solvent, the cell is heated at constant pressure (adjustable between 0.3 and 20 MPa) up to a maximum ... Accelerated solvent extraction (ASE) is a method for extracting various chemicals from a complex solid or semisolid sample ... Accelerated solvent extraction has found many applications in the food industry, including in: The testing of dietary seafoods ...
... , also known as D&C Violet No.2, oil violet, Solvent Blue 90, Alizarine Violet 3B, Alizurol Purple, Duranol ... Solvent Violet 13 is used to dye hydrocarbon products like solvents and petrol, thermoplastics, synthetic resins, e.g. ... Solvent dyes, Anthraquinone dyes, Phenol dyes, Anilines). ...
A polar aprotic solvent is a solvent that lacks an acidic proton and is polar. Such solvents lack hydroxyl and amine groups. In ... Many solvents, including chlorocarbons and hydrocarbons, are classifiable as aprotic, but polar aprotic solvents are of ... John R. Rumble (ed.). "Laboratory Solvent Solvents and Other Liquid Reagents". CRC Handbook of Chemistry and Physics, 102nd ... Methods for purification of common solvents are available. Stoye, Dieter (2000). "Solvents". Ullmann's Encyclopedia of ...
VOC exempt solvents are used in applications where traditional solvents are used. These include Coatings, Adhesives, Sealants ... and other solvents. tert-Butyl acetate is used as a solvent in the production of lacquers, enamels, inks, adhesives, thinners ... VOC exempt solvents are organic compounds that are exempt from restrictions placed on most volatile organic compounds (VOCs) in ... "VOC Exempt Solvents". Archived from the original on 2021-02-08. Retrieved 2021-02-08. (Webarchive template ...
Related hydrogen donor solvents or solvent components are dihydrophenanthrene and tetrahydroquinoline. Collin, Gerd; Höke, ... The classic hydrogen-donor solvent (or just donor solvent) is tetrahydronaphthalene, which converts to naphthalene by transfer ... A hydrogen-donor solvent is hydrocarbon that transfers hydrogen to hydrogen-poor substrates, such as coal. The hydrogen-poor ...
An inorganic nonaqueous solvent is a solvent other than water, that is not an organic compound. These solvents are used in ... Inorganic nonaqueous solvents can be classified into two groups, protic solvents and aprotic solvents. Early studies on ... In the solvent system definition of acids and bases, autoionization of solvents affords the equivalent to acids and bases. ... Nonaqueous titration Protic solvent Audrieth, Ludwig Frederick (1953). Non-aqueous Solvents; Applications as Media for Chemical ...
... is used for a wide variety of commercial applications. In the laboratory, Solvent Black 3 is used for Sudan ... Solvent Black 3 is an azo dye. It is a non-fluorescent, relatively thermostable lysochrome (fat-soluble dye) diazo dye used for ...
... is the organic compound N,N-diethyl-p-(phenylazo)aniline. It is an azo dye, which has the appearance of a ... Its EINECS number is 219-616-8. Its structure is similar to Solvent Yellow 124, which used as a fuel dye in European Union, and ... It is used to dye hydrocarbon solvents, oils, fats, waxes (candles), notably petrol, mineral oil and shoe polishes, and ...
Natural deep eutectic solvents (NADES) are bio-based deep eutectic solvents which are composed of two or more compounds that ... Some solvent extraction work has been done using DES solvents, Mark Foreman at Chalmers has in recent years published several ... "Ionic Liquids and Deep Eutectic Solvents in Natural Products Research: Mixtures of Solids as Extraction Solvents". Journal of ... "Activity coefficients in deep eutectic solvents: implications for the solvent extraction of metals". New Journal of Chemistry. ...
Solvent vapor annealing (SVA) is a widely used technique for controlling the morphology and ordering of block copolymer (BCP) ... Solvent engineering is the key to make the perovskite material and improving their quality through SVA in an anhydrous ... When looking at what affects SVA, one of the main things that come up first is the solvent that is used, and what nanostructure ... Ideally, the chamber in which SVA takes place is a metal chamber that is inert to reaction with the given solvent, allowing for ...
... is a form of blood plasma made from plasma collected from many people which is then processed with ... solvents as a form of virus processing, to try to get rid of viruses. Shaz, Beth H.; Hillyer, Christopher D.; Roshal, Mikhail; ...
Within the context of this years Green Solvents Conference the 1st Green Solvents Workshop will be offered. The target of the ... Also the context of safety and toxicity as well as the application of different solvents in industrial processes will be ... The prospective lectures cover molecular and engineering principles of non-conventional solvents, comprising aqueous phases, ... We are welcoming you in Kiel for the 1st Green Solvents Workshop. ... knowledge of different advanced fluids and green solvents ...
Organic solvents can be carcinogens, reproductive hazards, and neurotoxins. Carcinogenic organic solvents include benzene, ... Organic solvents are carbon-based substances capable of dissolving or dispersing one or more other substances. ... Organic solvents can be carcinogens, reproductive hazards, and neurotoxins. Carcinogenic organic solvents include benzene, ... Organic solvents are used in many industries. They are used in paints, varnishes, lacquers, adhesives, glues, and in degreasing ...
Overall, 26 percent of the men were exposed to benzene, 33 percent to chlorinated solvents and 25 percent to petroleum solvents ... Sabbath explained that her study didnt look at exact dosage of solvent exposure, but previous studies indicate that solvents ... Using company records, they assessed the workers lifetime exposure to fumes from chlorinated solvents, petroleum solvents, ... "We do know that in the short term, certain chemicals at work - solvents - are known to affect cognitive health, but there isnt ...
People who breathe Stoddard solvent can experience headaches; dizziness; and eye, skin, or throat irritation. This substance ... Exposure to stoddard solvent occurs mainly in the workplace. ... What is Stoddard solvent?. *What happens to Stoddard solvent ... Stoddard solvent is a petroleum mixture that is also known as dry cleaning safety solvent, petroleum solvent, and varnoline; ... How can Stoddard solvent affect my health?. Most of the information on the health effects of Stoddard solvent comes from ...
Stoddard solvent poisoning occurs when someone swallows or touches this chemical. ... Stoddard solvent is a flammable, liquid chemical that smells like kerosene. ... Stoddard solvent is a flammable, liquid chemical that smells like kerosene. Stoddard solvent poisoning occurs when someone ... Organic solvents. In: Aronson JK, ed. Meylers Side Effects of Drugs. 16th ed. Waltham, MA: Elsevier; 2016:385-389. ...
In a move that increases its footprint as a mechanical #recycling hub, Canada-based EPS #manufacturer NexKemia has finalized the purchase of Eco-Captation, a #polystyrene waste collection and recycling company headquartered in Prévost, ...
The toxins we are ingesting and inhaling relate mostly to our diet, lifestyle, and the quality of air we breathe. Ridding our bodies of toxins requires, above all, avoidance of them. Its much easier, more effective, and much more efficient to decrease your toxic load by avoidance than by trying to rev up detoxification with supplements, saunas, and chelation therapy (treatment for heavy metal toxicity). You can reduce your toxic load by up to 85% if you clean up your diet, dont smoke, and purify the air in your home. A study done on non-exposed people (i.e. people not known to have been exposed to a particular toxin through their work, etc) showed an average of 91 toxins in their bodies, at least 50 of which were carcinogenic, and others that cause birth defects and/or are toxic to the nervous system, endocrine (hormone) system, and immune system. Scary, huh ?! ...
The new cleaning agent is used during the painting process on RAV4 bumpers and reduces the use of solvent by 43,000 liters ( ... The cleaning agent contained about 10 percent solvent. With the help of the University of Waterloo and other Toyota team ... a solvent-water mixture was used to clean the nozzles of the high-tech spray robots. ...
the user of the solvent recycles the solvent for further use by them as a solvent (see Section 12.3.3 - What is the solvent ... For a user of a duty-paid solvent who recycles the solvent for reuse to be exempt from excise, the solvent must be used in the ... 12.2.1 WHAT IS A SOLVENT?. Most fuels used in a non-fuel application are used as solvents. When referring to solvents we are ... Excess solvent runs off, is collected in a sump and recirculated.. Over time the solvent becomes too contaminated for further ...
Organic solvents are a chemical class of compounds that are used routinely in commercial industries. They share a common ... encoded search term (Organic Solvent Neurotoxicity) and Organic Solvent Neurotoxicity What to Read Next on Medscape ... Organic Solvent Neurotoxicity Treatment & Management. Updated: Dec 11, 2018 * Author: Jonathan S Rutchik, MD, MPH, FACOEM; ... Solvent exposures and Parkinson disease risk in twins. Ann Neurol. 2012 Jun. 71(6):776-84. [QxMD MEDLINE Link]. ...
White spirit : Stoddard solvent  Larsen, P. B; World Health Organization (‎World Health OrganizationWorld Health Organization ... Volatile solvents abuse : a global overview  World Health Organization (‎World Health OrganizationWorld Health Organization, ... White spirit (‎Stoddard solvent)‎ : health and safety guide  World Health Organization; International Programme on Chemical ... WHO Study Group on Recommended Health-Based Limits in Occupational Exposure to Selected Organic Solvents; World Health ...
Water is a polar solvent, salt and sugar are both polar solutes. To dissolve iodine, which is non-polar, a solvent such as ... These ionic solutes can dissolve in both polar solvents and ionic solvents. ... Examples of solvents include water, acetone, turpentine and ethanol and examples of solutes include salt, sugar, iodine and ... The polarity of each solvent or solute substance depends on the covalent bonds it has between atoms. When two non-metal atoms ...
High gloss, solvent based inks designed for long life outdoor applications on suitable self adhesive flexible vinyls. ... High gloss, solvent based ink designed for long life outdoor applications on suitable rigid plastics for signs. ... Solvent based inks offering a cost effective alternative to silvering to obtain mirror finish prints. ...
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Solvent-Free & suitable for use on all fabrics. ... NO HYDROCARBON SOLVENTS NO PHOSPHATES NO NITRATES Contains: ... NO HYDROCARBON SOLVENTS NO PHOSPHATES NO NITRATES Contains: Water, Fatty Alcohol Ethoxylates, D-Limonene (Orange Oil), Ethanol ... A modern, environmentally responsible replacement for traditional heavy solvent based pre-wash sprays. ...
Reactions of Oxo-compounds in Ionic Solvents, Volume 41 - 1st Edition. Print Book & E-Book. ISBN 9780444517821, 9780080455242 ... Generalised definition for solvent system. Solvents of I and II kind.. Part 2. Studies of homogeneous acid-base reactions in ... Features of high-temperature ionic solvents as media for Lux acid-base interactions. Methods of investigations. Ionic solvents ... Oxoacidity: Reactions of Oxo-compounds in Ionic Solvents. Holiday Sale. :. Save up to 25% on print and eBooks with FREE ...
... deoxyguanosine derivative induced by an indirect solvent effect. A hexadecameric supramolecule containing four stacked ... Solvent-induced high fidelity switching between two discrete supramolecules J Am Chem Soc. 2009 Mar 11;131(9):3186-8. doi: ... deoxyguanosine derivative induced by an indirect solvent effect. A hexadecameric supramolecule containing four stacked ...
When it comes to Citrus-Based Solvent Degreasers, you can count on Grainger. Supplies and solutions for every industry, plus ... Citrus-Based Solvent. Strong-Acting Solvent-Based Degreasers Citrus-Based Solvent, sorted by Container Type, custom. Container ... Coconut Oil Based Solvent. Food-Processing Industry Degreasers Coconut Oil Based Solvent, sorted by Container Type, custom. ... Citrus-Based Solvent. Food-Processing Industry Degreasers Citrus-Based Solvent, sorted by Container Type, custom. Container ...
The former ISP MARL now INEOS Solvents Marl GmbH is located at the Marl Chemical Park. In 1993 the old acetylene plant from ... During the following decades, Moers site became an important European player in producing solvents and fine chemicals. Our ... Since 1st September the former ISP MARL GmbH is now operating as INEOS Solvents Marl GmbH. ... In 1939, focus was switched to producing chemical products, especially oxygenated solvents. ...
Shop our wide variety of gun cleaning solvents and ensure your firearms stay clean and ready for use. ... 9 Gun Bore Solvent Cleaner 16oz Pint Bottle 10 Pack Hoppes No. 9 Gun Bore Solvent Cleaner 16oz Pint B... ... 9 Gun Bore Solvent Cleaner 16 oz. Pint Bottle Hoppes No. 9 Gun Bore Solvent Cleaner 16 oz. Pint... ... 9 Gun Bore Solvent Cleaner 4oz Bottle 10 Pack Hoppes No. 9 Gun Bore Solvent Cleaner 4oz Bottle ... ...
Perry L. McCarty ][1] Chlorinated solvents, the carcinogenic agents that permeate the air in your dry cleaners, have ... and potentially allow manipulation of the conditions underground to facilitate the natural destruction of chlorinated solvents ... will potentially allow manipulation of the conditions underground to facilitate the natural destruction of chlorinated solvents ... Breathing with Chlorinated Solvents. @article{McCarty1997BreathingWC, title={Breathing with Chlorinated Solvents}, author={ ...
Could parental exposure to solvents at work be linked to autism spectrum disorder (ASD) in their children? According to an ... All of these exposures fall into the broader category of solvents, or solvent-containing products. ... Parental exposure to solvents may increase risk of ASD in children. *Download PDF Copy ... Could parental exposure to solvents at work be linked to autism spectrum disorder (ASD) in their children? According to an ...
Thats because bankruptcy laws allow any entity that pays to maintain a banks collateral to recover its costs. In this case, the board was paying to maintain the common areas of the homeowners community, which are tied contractually to home loans in a shared community and considered part of the banks collateral. The next step was Hymans order, handed down in February, which enabled the association to force the banks to take title to units independent of their mortgage foreclosure actions.. "The association had to file Chapter 11 in order to accomplish any and of this," Kinsey said. So far one bank has complied with Hymans orders and the association has begun filing lien foreclosure suits against the rest, Kinsey said.. Bazos said the communitys budget and morale are in the best shape in years.. "Our owners are very happy because their properties are standing on financially sound ground and the properties are easier to sell because you dont have an association that is in default and you ...
Find Chlorinated Solvent Remediation - Soil and Groundwater information on the worlds largest Environmental portal. ... Chlorinated Solvent Remediation. Articles & Whitepapers. * Arbor Day Foundation and Intrinsyx Environmental Team up to Tackle ... Full-scale application of nZVI: mixed contamination of chromium and chlorinated solvents Patent Review And Re-issue Of United ... Full-scale application of nZVI: mixed contamination of chromium and chlorinated solvents Remediation company EKORA in ...
Solvents are used to dilute the color and to clean brushes. Avoid over-thinning.Artists Picture Cleaner - A liquid which ... Sansodor Low-Odor Solvent - Sansodor leaves no residue in the paint film, has a very low aromatic content for minimal risk from ... Sansodor Low-Odor Solvent - Sansodor leaves no residue in the paint film, has a very low aromatic content for minimal risk from ... Solvents are used to dilute the color and to clean brushes. Avoid over-thinning. ...
If not a solvent, at least tell me what the best technique is, please. (600 other people wanted to know at some point, too ) ... solvent and other had permanent brain damage from using. that stuff in doors cleaning off electrical parts.. I know of one or ...
  • Owing to the versatile and favorable chemical properties of aprotic solvents, its application in adhesives, pharmaceutical and oil and gas is growing exponentially, consequently propelling the market growth. (
  • The improvement of adhesives containing different solvents and advances in the treatment of dentin resulted in bond strengths between dentin and higher resin. (
  • This series of resins is light color rosin ester, which exhibits very good properties in solvent-based adhesives such as good color stability, outstanding ageing resistance, heat resistance and excellent compatibility. (
  • Examples of solvents include water, acetone, turpentine and ethanol and examples of solutes include salt, sugar, iodine and copper sulfate. (
  • The process of surface cleaning is often a manual one, with powerful chemical solvents such as Acetone and MEK applied directly to surfaces to remove grease, contaminants, and staining. (
  • The "primer" in isolation or combined with the adhesive is dissolved in solvents such as acetone, water and Alcohol Free. (
  • Organic solvents recognized as neurotoxins include n-hexane, tetrachloroethylene, and toluene. (
  • One guy died from using Toluene solvent and other had permanent brain damage from using that stuff in doors cleaning off electrical parts. (
  • Thus, the sharp rise in demand for toluene is expected to surge the market growth for aprotic solvents. (
  • For example, inhaled Toluene vapour - another common industrial solvent - may cause damage to the brain, kidneys, liver, nervous system and heart. (
  • Also the context of safety and toxicity as well as the application of different solvents in industrial processes will be discussed. (
  • By using a type of solid state NMR (Nuclear Magnetic Resonance), the researchers were able to detect changes in the fluid skin molecules when they interact with the molecules of different solvents. (
  • Different solvents are responsible for differents application methodologies e and treatments. (
  • Parents of children with ASD were also more likely to report exposures to asphalt and solvents, compared to parents of unaffected children. (
  • All of these exposures fall into the broader category of solvents, or solvent-containing products. (
  • In 2012, investigators from the National Institute for Occupational Safety and Health (NIOSH) began working with the Local Hazardous Waste Management Program in King County, Washington (LHWMP)* to learn about occupational exposures to two alternative solvents. (
  • We provided recommendations for the shop owners and employees to help reduce their exposures to the drycleaning solvents and other chemicals. (
  • Some organic solvents, resin monomers and related compounds, pigments and occupational exposures in paint manufacture and painting / this publication represents the views and expert opinions of an IARC Working Group on the Evaluation of Carcinogenic Risks to Humans which met in Lyon, 18-25 October 1988. (
  • NIOSH investigators concluded that a health hazard existed due to dermal exposures to solvents, noise exposures, and the improper use of personal protective equipment. (
  • The effects of swallowing Stoddard solvent are not known. (
  • The effects of swallowing Stoddard solvent be more than 60 ppm in workplace air for a 10-hour workday, are not known. (
  • These evaluations are one step towards understanding the risks involved with alternative drycleaning solvents. (
  • Independent evaluation of the toxicological properties of these alternative drycleaning solvents is needed. (
  • The former is the use of substances in 2 mutually insoluble (or slightly soluble) solvent solubility or distribution coefficient of the difference, so that the substance from one solvent to another solvent transfer method, the latter is the use of solvents in solid materials to separate a component of the method, also known as leaching. (
  • Also, the Solvent Black 35 has good solubility in ketonic solvents like MEK, however it has insolubility in alcohols. (
  • Solvent based inks offering a cost effective alternative to silvering to obtain mirror finish prints. (
  • High gloss, solvent based inks designed for long life outdoor applications on suitable self adhesive flexible vinyls. (
  • It guarantees excellent printing results with eco-solvent inks. (
  • 4-Chlorobenzotrifluoride is widely used as a solvent and diluent for inks, paints, toners, and coatings and in dispersive applications in the automotive industry. (
  • These employees had symptoms perceived to be caused by exposure to inks and solvents on the job. (
  • We do know that in the short term, certain chemicals at work - solvents - are known to affect cognitive health, but there isn't a lot done that has looked at the long-term impact on cognitive function, particularly after people retire," said Erika Sabbath, of the Harvard School of Public Health in Boston, who led the study. (
  • Because Stoddard solvent is a mixture of many chemicals, these chemicals may react differently in the environment. (
  • It is not known whether Stoddard solvent will build up in plants or animals living in contaminated soil or water, but some of the chemicals that make up Stoddard solvent might build up in these situations. (
  • Because Stoddard solvent is a mixture of many chemicals, some of these chemicals can be detected in your breath, blood, urine, and fat. (
  • However, the tests cannot tell you if you have been exposed to the specific mixture of chemicals found in Stoddard solvent. (
  • some of the chemicals that make up Stoddard solvent might build up in these situations. (
  • During the following decades, Moers site became an important European player in producing solvents and fine chemicals. (
  • It is a combination of chemicals (refined petroleum solvent predominantly C7-C11 which is typically 55% paraffins, 30% monocycloparaffins, 2% dicycloparaffins & 12% alklybenzenes). (
  • The proper selection of solvents is important during liquefaction of biomass process to produce fuel additives and valuable chemicals. (
  • IARC Monographs, volume 63: dry cleaning, some chlorinated solvents and other industrial chemicals - summary of data reported and evaluation. (
  • Carcinogenic organic solvents include benzene, carbon tetrachloride, and trichloroethylene. (
  • Very few studies have been located that study the carcinogenic effects of Stoddard solvent in humans or animals. (
  • Perry L. McCarty ][1] Chlorinated solvents, the carcinogenic agents that permeate the air in your dry cleaners, have accumulated in the groundwater because microorganisms in the soil do not break them down. (
  • This fact sheet answers the most frequently asked health questions about stoddard solvent. (
  • Exposure to Stoddard solvent occurs mainly in the workplace. (
  • What is Stoddard solvent? (
  • Stoddard solvent is a colorless, flammable liquid that smells and tastes like kerosene. (
  • What happens to Stoddard solvent when it enters the environment? (
  • How might I be exposed to Stoddard solvent? (
  • Using products containing Stoddard solvent such as a paint or paint thinner, and breathing the vapors, or getting the vapors in your eyes. (
  • Breathing contaminated air where Stoddard solvent is manufactured, used, or spilled. (
  • Ingesting contaminated soil or water near waste sites containing Stoddard solvent. (
  • How can Stoddard solvent affect my health? (
  • Exposure to Stoddard solvent in the air can affect your nervous system and cause dizziness, headaches, or a prolonged reaction time. (
  • Rats, cats, and dogs that breathed in large amounts of Stoddard solvent for several hours suffered seizures. (
  • Breathing Stoddard solvent has caused bronchitis in guinea pigs, but neither seizures nor bronchitis have been reported when humans breathed it. (
  • It is not known whether Stoddard solvent can cause birth defects or affect reproduction. (
  • How likely is Stoddard solvent to cause cancer? (
  • The International Agency for Research on Cancer (IARC) has determined that Stoddard solvent is not classifiable as to its carcinogenicity to humans. (
  • Is there a medical test to show whether I've been exposed to Stoddard solvent? (
  • There is no routinely used test to show whether you have been exposed to Stoddard solvent. (
  • The Occupational Safety and Health Administration (OSHA) has set a maximum exposure limit of 500 parts of Stoddard solvent per 1 million parts of air (500 ppm) for an 8-hour workday, 40-hour workweek. (
  • Stoddard solvent poisoning occurs when someone swallows or touches this chemical. (
  • This list may not include all products containing Stoddard solvent. (
  • Below are symptoms of Stoddard solvent poisoning in different parts of the body. (
  • If Stoddard solvent get into the lungs (aspiration), serious and possibly permanent lung damage can occur. (
  • Stoddard solvent is a petroleum mixture that is also ment. (
  • Using products containing Stoddard solvent such as a Use of trade names is for identification only and does not paint or paint thinner, and breathing the vapors, or getting imply endorsement by the Agency for Toxic Substances and the vapors in your eyes. (
  • Because Stoddard solvent is a mixture of many chemi taining Stoddard solvent. (
  • Stoddard solvent for several hours suffered seizures. (
  • A case study on co-exposure to a mixture of organic solvents in a Tunisian adhesive-producing company. (
  • Asia-Pacific region dominates the aprotic solvents market, owing to the soaring consumption of aprotic solvents in adhesive, pharmaceutical and oil and gas segment from countries, such as China, India and Vietnam. (
  • Made with 25µ bioriented polypropylene and natural rubber solvent adhesive of high adhesiveness. (
  • The CO2 capture test facility at Mongstad in Norway has launched testing of the amine solvent MEA (Monoethanolamine). (
  • CO 2 loading in the amine solvent increases the Henry's volatility coefficient of the more non-polar nitrosamine while it decreased the Henry's volatility coefficient of the more polar nitrosamine. (
  • VM&P Naphtha is a general purpose thinner and cleanup solvent for use with many alkyd and oil type paints, enamels and varnishes. (
  • Increased demand for paints & coatings, which require aliphatic hydrocarbon solvents & thinners, from various end-use industries, such as decorative, automotive, and industrial, is one of the key factors driving the growth of the aliphatic hydrocarbon solvents & thinners market across the globe. (
  • Based on application, the paints & coatings segment of the aliphatic hydrocarbon solvents & thinners market is projected to grow at the highest CAGR from 2020 to 2025 in terms of both, value and volume. (
  • Aliphatic hydrocarbon solvents & thinners are primarily used in the production of paints & coatings because the mix of solvents used in this industry are continually changing, and these satisfy increasing demands for enhanced performance. (
  • Increased demand for paints & coatings from various end-use industries, such as decorative, automotive, industrial, and protective paints & coatings, is driving the growth of the paints & coatings segment of the aliphatic hydrocarbon solvents & thinners market worldwide. (
  • It is used as a thinner for paints & coatings, as a solvent in hydrocarbon cracking, in laundry soaps, organic chemistry, cleaning fluids, and various other applications. (
  • Generally, this is the same period of life when people begin to experience cognitive decline, she added, so she and her colleagues wanted to see if there were certain patterns of lifetime exposure to solvents that predicted cognitive problems after retirement. (
  • The study also found that people who had the most exposure to solvents and were also exposed most recently had cognitive problems in areas classically associated with solvent exposure, but also other areas of cognitive function. (
  • Could parental exposure to solvents at work be linked to autism spectrum disorder (ASD) in their children? (
  • Exposure to solvents and abrasive-blasting material during the manufacture of copper-based novelty gifts. (
  • Abuse of volatile solvents and inhalants : papers presented at a WHO advisory meeting / [editors], A. E. Arif, M. Grant, V. Navaratnam. (
  • For airborne solvents, the concentrations exceeding the threshold limit value are mainly for hexane. (
  • In the oil industry, the use of solvent commercial hexane or No. 6 solvent oil to extract the oil in the oil method, known as leaching. (
  • The extracting process, the solvent hexane, and grease and leaching material billet (soybean germ flakes, puffed soybeans, rapeseed cake, etc.) does not have a chemical reaction, is only a simple solute penetration, diffusion process, so the leaching method of oil production is a physical process. (
  • Solvents works on the dilution of the monomer and the evaporation of water remaining on the dentin surface thus facilitating the formation of the hybrid layer. (
  • If you work in an industry that uses organic solvents, please read chemical labels and the accompanying Safety Data Sheets for hazard information. (
  • In 1939, focus was switched to producing chemical products, especially oxygenated solvents. (
  • The former ISP MARL now INEOS Solvents Marl GmbH is located at the Marl Chemical Park. (
  • There's actually a lot of common solvents which will dissolve polystyrene - which makes PS a crappy choice of storage vial for random chemical samples (as I discovered the hard way). (
  • Professional Formulas Solvent Group Homeopathic desensitization/detoxification of the body for th ill effects caused by small ring chemical contituents such as Benzene. (
  • Safely transporting, storing, using and disposing of flammable chemical solvents in the workplace creates many challenges to make sure the product is kept away from open flames, sparks, heat, static discharge, and other ignition sources. (
  • Edible oil solvent extracting is a chemical unit operation called Extraction, which is divided into liquid-liquid extraction and solid-liquid extraction. (
  • The process of "solvent extraction" has different Chinese names in different disciplines, for example, the extraction of chemical components in botany is called "solvent extraction" ("Botanical Terminology", second edition), chemical engineering is called "solvent extraction" ("chemical engineering terminology" first edition), etc. (
  • We had another solvent printer for about eight years and it wasn't producing the quality and speed we needed, so we got the Epson SureColor from LexJet. (
  • However, these models are not applica- ble to highly water-soluble or blood-soluble solvents, such as ketones and alcohols, because the mucus layer lining the wall of the respiratory tract absorbs the solvents during inhalation and releases them during exhalation. (
  • Leaching method (solvent extraction) oil production is the most widely used oil production method in the world today, is a common safety and health, scientific and advanced oil production process at home and abroad. (
  • Solvent extraction temperature has a great impact on the leaching rate. (
  • Metso Outotec has signed an agreement for the supply of copper solvent extraction and electrowinning technology to North America. (
  • Metso Outotec's scope of delivery includes basic engineering, a technology package for the VSF® solvent extraction and electrowinning plants, as well as advisory services for mechanical installation and commissioning, start-up, and spare parts. (
  • The prospective lectures cover molecular and engineering principles of non-conventional solvents, comprising aqueous phases, ionic liquids and supercritical fluids, among others. (
  • These ionic solutes can dissolve in both polar solvents and ionic solvents. (
  • The generally accepted definitions of acids and bases together with the generalized definition for the solvent system introduced by the author for the description of both molecular and ionic solvents are discussed. (
  • Features of high-temperature ionic solvents as media for Lux acid-base interactions. (
  • Ionic solvents based on alkali metal nitrates. (
  • Oxobasicity index as a measure of relative oxoacidic properties of high-temperature ionic solvents. (
  • Get the results you expect with Honeywell Chromasolv Solvents, expertly manufactured with the purity and consistency required for LC/MS, HPLC, and GC. (
  • Chromasolv™ HPLC Solvents undergo rigorous testing to ensure suitability for general and routine HPLC analysis. (
  • Urinary solvents or metabolites were measured either by GC or high-performance liquid chromatography (HPLC). (
  • Organic solvents are carbon-based substances capable of dissolving or dispersing one or more other substances. (
  • When referring to solvents we are referring to fuels used to dissolve or form solutions with other substances. (
  • However, if the leaching temperature is too high, it will cause an increase in the amount of vaporized solvent in the extractors, a higher pressure, an increase in solvent loss in production, and an increase in the amount of non-oil substances in the leached gross oil. (
  • Like dissolves like" refers to the fact that polar solutes will dissolve in polar solvents and non-polar solutes will only dissolve in non-polar solvents. (
  • Polar solutes cannot dissolve in non-polar solvents. (
  • To dissolve iodine, which is non-polar, a solvent such as ethyl acetate would be needed and it would not dissolve into water. (
  • Water-based degreasers use water as primary solvent, plus detergents, emulsifiers, cleaning agents, surfactants, and other compounds, to dissolve soils or make contaminants more dissolvent in water. (
  • When you have to dissolve something, how do you know if X or Y solvent is going to work? (
  • This left me perplexed and lost, since I felt like I didn't know anymore what criteria to use to say that a solvent will dissolve something. (
  • Do you have access to any text or table with a list of solvents and what they dissolve (and perhaps the reason why)? (
  • Those charts and tables only say that X dissolves Y. I want to know why X dissolves Y and if there is a general rule that lets you deduce if solvent X is going to dissolve Y. "Like dissolves like" doesn't really seem to work so well. (
  • Hoppe's No. 9 Gun Bore Solvent Cleaner 2 oz. (
  • Hoppe's No. 9 Gun Bore Solvent Cleaner 16oz Pint Bottle 10 Pack Hoppe's No. 9 Gun Bore Solvent Cleaner 16oz Pint B. (
  • SIG Sauer SPEC1 Premium Solvent, Cleaner, Lubricant Combo Pack 2 oz Bottles SIG Sauer SPEC1 Premium Solvent, Cleaner, Lubrican. (
  • Hoppe's No. 9 Gun Bore Solvent Cleaner 2oz Aerosol Can Hoppe's No. 9 Gun Bore Solvent Cleaner 2oz Aerosol. (
  • The following resources provide information about occupational exposure to organic solvents. (
  • The Occupational Safety and Health Administration, or OSHA, sets U.S. standards on how solvents should be handled in the workplace and what levels of exposure are safe. (
  • Occupational exposure to organic solvents and lymphoid neoplasms in men: results of a French case-control study. (
  • Thus, a process of occupational risk assessment via a biotoxicological and airborne monitoring for solvents is now set. (
  • Irritant contact dermatitis from repeated workplace exposure of the hands to soaps, cleansers, and solvents is the source of most occupational skin disorders. (
  • Solvents are commonly used in many industries and therefore exposure to multiple solvents is a common occupational hazard. (
  • Sciencemadness Discussion Board » Fundamentals » Organic Chemistry » How to find the right solvent? (
  • Explore Chromasolv solvents specifically developed for gas chromatography (GC) and GC headspace protocols, including the analysis of volatile organics, pesticide residues, dioxins, furans, and PCB. (
  • Airborne solvents were determined using gas chromatography (GC-FID). (
  • Our products are in line with EN ISO 9001 and 14001 as well as Kosher Certificates. (
  • No water or solvent residues itself must remain in the intimacy of demineralized dentin, since both will provide inadequate polymerization of resin monomers contained in the "primer" or fluid resin, applied later. (
  • We learned that the highest air concentrations of the drycleaning solvents were during loading and unloading of the machines and when pressing fabrics. (
  • Based on type, the varnish makers & painters naphtha segment of the aliphatic hydrocarbon solvents & thinners market is projected to grow at a higher CAGR than all other segments during the forecast period in terms of both value and volume. (
  • A majority of the manufacturers across the globe produce aliphatic hydrocarbon solvents & thinners, which is a type of varnish makers & painters naphtha. (
  • China, India, Japan, and South Korea are key countries contributing to the increased demand for aliphatic hydrocarbon solvents & thinners in this region. (
  • Innovations in production techniques of electronic appliances, rise in population, and increase in the income of the middle-class population, have resulted in increased demand for consumer durables and automobiles in the Asia Pacific, thereby contributing to the growth of the aliphatic hydrocarbon solvents & thinners market in this region. (
  • These common industrial solvents create workplace hazards and health risks to people who regularly use or come into contact with them. (
  • For example, a solvent with a flash point of 2 degrees Celsius is prone to ignition in almost any normal workplace. (
  • High gloss, solvent based ink designed for long life outdoor applications on suitable rigid plastics for signs. (
  • Water based sealers tend to have a lower gloss, or darkening effect, than solvent based sealers. (
  • Solvent extracting time should ensure that the oil molecules have enough time to diffuse into the solvent. (
  • Solvent molecules are absorbed in the mucus layer during inhalation and released during exhalation. (
  • The solvent molecules deposited in the mucus layer diffuse radially into the mucosal tissue of the respiratory tract and transfer to the mucosal blood flow. (
  • Sansodor Low-Odor Solvent - Sansodor leaves no residue in the paint film, has a very low aromatic content for minimal risk from inhalation and has the highest flash point among solvents making it the least combustible. (
  • Organic solvents can be carcinogens, reproductive hazards, and neurotoxins. (
  • Organic solvents recognized as reproductive hazards include 2-ethoxyethanol, 2-methoxyethanol, and methyl chloride. (
  • Since 1st September the former ISP MARL GmbH is now operating as INEOS Solvents Marl GmbH. (
  • A solvent must have the same polarity as the solute. (
  • The polarity of each solvent or solute substance depends on the covalent bonds it has between atoms. (
  • Physical leaching is a simple solute dissolution process, the solvent used are water, alcohol, or other organic solvents. (
  • Glick recently brought in Epson's new SureColor S30670 low-solvent printer that he got from LexJet to add to a printer arsenal that also includes an Epson GS6000 low-solvent and HP Designjet Z6100 aqueous printer. (
  • Using company records, they assessed the workers' lifetime exposure to fumes from chlorinated solvents, petroleum solvents, benzene and non-benzene aromatic solvents. (
  • Overall, 26 percent of the men were exposed to benzene, 33 percent to chlorinated solvents and 25 percent to petroleum solvents. (
  • The target of the workshop is to provide the background knowledge of different advanced fluids and green solvents especially for PhD Students, Post-Docs and early stage researchers. (
  • Breakthrough Clean Technologies Military Grade Solvent One 16 oz Spray Bottle Breakthrough Clean Technologies Military Grade Sol. (
  • Our company is zealously indulged in presenting our widely spread valued clients with top-grade Solvent Black 35 . (
  • This MSA varnish solvent is designed especially for use with Golden¬Æ MSA varnishes. (
  • A volatile fragrant flammable liquid ketone used chiefly as a solvent and in organic synthesis. (
  • As she studied and learned the vehicle painting process, she noticed every time a new color was applied to a bumper, a solvent-water mixture was used to clean the nozzles of the high-tech spray robots. (
  • We saw employees mixing the butylal-based solvent with a fabric pretreatment and spraying the spot treatment mixture without personal protective equipment (such as gloves and eye protection). (
  • NIOSH conducted a health hazard evaluation (HHE) in response to an employee request concerning potential exposure to lacquer solvents, abrasive-blasting materials, and a patina solution. (
  • There are also two varieties of fluorinated solvent blends specifically designed to replace TCE and PCE, although they are marketed as degreasers. (
  • When we looked at those where the exposure happened a long time ago, 30 to 50 years before, we found that the effects of solvents on cognitive function didn't necessarily fade away," she said. (
  • Solvent exposure and cognitive function in automotive technicians. (
  • Thus, these solvents are more reactive in nature. (
  • 1-Butyl glycidyl ether is a reactive intermediate and viscosity-reducing solvent used in the manufacture of epoxy resins, and is also used as a surface modifier in the dyeing of cotton and wool. (
  • DES offer control over micelle morphology, as the solvent can be tuned to be interacting or non-interacting with the surfactant, altering micelle shape. (
  • We find morphology transitions in the phase diagram of common surfactants in DES that are not found in other pure solvents. (
  • Although natural attenuation is not a panacea, at sites where it is applicable, it offers a scientifically sound, cost-effective method to remediate groundwater contaminated with chlorinated solvents. (
  • Feldman RG, Ratner MH, Ptak T. Chronic toxic encephalopathy in a painter exposed to mixed solvents. (
  • Chronic effects of organic solvents on the central nervous system and diagnostic criteria / report on a Joint WHO/Nordic Council of Ministers Working Group, Copenhagen, 10-14 June 1985. (