Sulfonic Acids: Inorganic or organic oxy acids of sulfur which contain the RSO2(OH) radical.Trinitrobenzenesulfonic Acid: A reagent that is used to neutralize peptide terminal amino groups.Naphthalenesulfonates: A class of organic compounds that contains a naphthalene moiety linked to a sulfonic acid salt or ester.Anilino Naphthalenesulfonates: A class of organic compounds which contain an anilino (phenylamino) group linked to a salt or ester of naphthalenesulfonic acid. They are frequently used as fluorescent dyes and sulfhydryl reagents.Colitis: Inflammation of the COLON section of the large intestine (INTESTINE, LARGE), usually with symptoms such as DIARRHEA (often with blood and mucus), ABDOMINAL PAIN, and FEVER.Alkanesulfonic Acids: Sulfonic acid derivatives that are substituted with an aliphatic hydrocarbon group.Benzothiazoles: Compounds with a benzene ring fused to a thiazole ring.Sulfanilic Acids: Aminobenzenesulfonic acids. Organic acids that are used in the manufacture of dyes and organic chemicals and as reagents.Unithiol: A chelating agent used as an antidote to heavy metal poisoning.Colon: The segment of LARGE INTESTINE between the CECUM and the RECTUM. It includes the ASCENDING COLON; the TRANSVERSE COLON; the DESCENDING COLON; and the SIGMOID COLON.Alkanesulfonates: Organic esters or salts of sulfonic acid derivatives containing an aliphatic hydrocarbon radical.Laccase: A copper-containing oxidoreductase enzyme that catalyzes the oxidation of 4-benzenediol to 4-benzosemiquinone. It also has activity towards a variety of O-quinols and P-quinols. It primarily found in FUNGI and is involved in LIGNIN degradation, pigment biosynthesis and detoxification of lignin-derived products.PicratesSaussurea: A plant genus of the family ASTERACEAE, order Asterales, subclass Asteridae. It is a source of costus root oil and should not be confused with the genus COSTUS.Dinitrofluorobenzene: Irritants and reagents for labeling terminal amino acid groups.Spectrometry, Fluorescence: Measurement of the intensity and quality of fluorescence.Peroxidase: A hemeprotein from leukocytes. Deficiency of this enzyme leads to a hereditary disorder coupled with disseminated moniliasis. It catalyzes the conversion of a donor and peroxide to an oxidized donor and water. EC 126.96.36.199.Indigo Carmine: Indolesulfonic acid used as a dye in renal function testing for the detection of nitrates and chlorates, and in the testing of milk.Fluorescent Dyes: Agents that emit light after excitation by light. The wave length of the emitted light is usually longer than that of the incident light. Fluorochromes are substances that cause fluorescence in other substances, i.e., dyes used to mark or label other compounds with fluorescent tags.Sulfenic Acids: Oxy acids of sulfur with the general formula RSOH, where R is an alkyl or aryl group such as CH3. They are often encountered as esters and halides. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Isatin: An indole-dione that is obtained by oxidation of indigo blue. It is a MONOAMINE OXIDASE INHIBITOR and high levels have been found in urine of PARKINSONISM patients.Petasites: A plant genus of the family ASTERACEAE. Members contain SESQUITERPENES. The common name of sweet coltsfoot is similar to the common name for TUSSILAGO.Cysteine: A thiol-containing non-essential amino acid that is oxidized to form CYSTINE.Sulfhydryl Reagents: Chemical agents that react with SH groups. This is a chemically diverse group that is used for a variety of purposes. Among these are enzyme inhibition, enzyme reactivation or protection, and labelling.Administration, Rectal: The insertion of drugs into the rectum, usually for confused or incompetent patients, like children, infants, and the very old or comatose.Camphor: A bicyclic monoterpene ketone found widely in plants, especially CINNAMOMUM CAMPHORA. It is used topically as a skin antipruritic and as an anti-infective agent.Benzenesulfonates: Organic salts and esters of benzenesulfonic acid.Fluorocarbons: Liquid perfluorinated carbon compounds which may or may not contain a hetero atom such as nitrogen, oxygen or sulfur, but do not contain another halogen or hydrogen atom. This concept includes fluorocarbon emulsions and fluorocarbon blood substitutes.Cysteic Acid: Beta-Sulfoalanine. An amino acid with a C-terminal sulfonic acid group which has been isolated from human hair oxidized with permanganate. It occurs normally in the outer part of the sheep's fleece, where the wool is exposed to light and weather.Intestinal Mucosa: Lining of the INTESTINES, consisting of an inner EPITHELIUM, a middle LAMINA PROPRIA, and an outer MUSCULARIS MUCOSAE. In the SMALL INTESTINE, the mucosa is characterized by a series of folds and abundance of absorptive cells (ENTEROCYTES) with MICROVILLI.Sulfur Isotopes: Stable sulfur atoms that have the same atomic number as the element sulfur, but differ in atomic weight. S-33, 34, and 36 are stable sulfur isotopes.Cytophaga: A genus of gram-negative gliding bacteria found in SOIL; HUMUS; and FRESHWATER and marine habitats.Sesquiterpenes, Eudesmane: SESQUITERPENES cyclized into two adjoining cyclohexane rings but with a different configuration from the ARTEMISININS.Inflammatory Bowel Diseases: Chronic, non-specific inflammation of the GASTROINTESTINAL TRACT. Etiology may be genetic or environmental. This term includes CROHN DISEASE and ULCERATIVE COLITIS.Free Radical Scavengers: Substances that influence the course of a chemical reaction by ready combination with free radicals. Among other effects, this combining activity protects pancreatic islets against damage by cytokines and prevents myocardial and pulmonary perfusion injuries.Dextran Sulfate: Long-chain polymer of glucose containing 17-20% sulfur. It has been used as an anticoagulant and also has been shown to inhibit the binding of HIV-1 to CD4-POSITIVE T-LYMPHOCYTES. It is commonly used as both an experimental and clinical laboratory reagent and has been investigated for use as an antiviral agent, in the treatment of hypolipidemia, and for the prevention of free radical damage, among other applications.Oxyquinoline: An antiseptic with mild fungistatic, bacteriostatic, anthelmintic, and amebicidal action. It is also used as a reagent and metal chelator, as a carrier for radio-indium for diagnostic purposes, and its halogenated derivatives are used in addition as topical anti-infective agents and oral antiamebics.Kinetics: The rate dynamics in chemical or physical systems.Hydrogen-Ion Concentration: 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)Protein Denaturation: Disruption of the non-covalent bonds and/or disulfide bonds responsible for maintaining the three-dimensional shape and activity of the native protein.Oxidation-Reduction: A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).Circular Dichroism: 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)Biphenyl CompoundsDisease Models, Animal: Naturally occurring or experimentally induced animal diseases with pathological processes sufficiently similar to those of human diseases. They are used as study models for human diseases.Protein Conformation: 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).Visceral Afferents: The sensory fibers innervating the viscera.Haptens: Small antigenic determinants capable of eliciting an immune response only when coupled to a carrier. Haptens bind to antibodies but by themselves cannot elicit an antibody response.Energy Transfer: The transfer of energy of a given form among different scales of motion. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed). It includes the transfer of kinetic energy and the transfer of chemical energy. The transfer of chemical energy from one molecule to another depends on proximity of molecules so it is often used as in techniques to measure distance such as the use of FORSTER RESONANCE ENERGY TRANSFER.Molecular Structure: The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.Plant Extracts: Concentrated pharmaceutical preparations of plants obtained by removing active constituents with a suitable solvent, which is evaporated away, and adjusting the residue to a prescribed standard.Protein Folding: Processes involved in the formation of TERTIARY PROTEIN STRUCTURE.Caprylates: Derivatives of caprylic acid. Included under this heading are a broad variety of acid forms, salts, esters, and amides that contain a carboxy terminated eight carbon aliphatic structure.Guanidine: A strong organic base existing primarily as guanidium ions at physiological pH. It is found in the urine as a normal product of protein metabolism. It is also used in laboratory research as a protein denaturant. (From Martindale, the Extra Pharmacopoeia, 30th ed and Merck Index, 12th ed) It is also used in the treatment of myasthenia and as a fluorescent probe in HPLC.Rats, Sprague-Dawley: A strain of albino rat used widely for experimental purposes because of its calmness and ease of handling. It was developed by the Sprague-Dawley Animal Company.Binding Sites: The parts of a macromolecule that directly participate in its specific combination with another molecule.Antioxidants: Naturally occurring or synthetic substances that inhibit or retard the oxidation of a substance to which it is added. They counteract the harmful and damaging effects of oxidation in animal tissues.PeroxidasesIndicators and Reagents: Substances used for the detection, identification, analysis, etc. of chemical, biological, or pathologic processes or conditions. Indicators are substances that change in physical appearance, e.g., color, at or approaching the endpoint of a chemical titration, e.g., on the passage between acidity and alkalinity. Reagents are substances used for the detection or determination of another substance by chemical or microscopical means, especially analysis. Types of reagents are precipitants, solvents, oxidizers, reducers, fluxes, and colorimetric reagents. (From Grant & Hackh's Chemical Dictionary, 5th ed, p301, p499)Oxygen Isotopes: Stable oxygen atoms that have the same atomic number as the element oxygen, but differ in atomic weight. O-17 and 18 are stable oxygen isotopes.MercaptoethanolIodoacetamide: An alkylating sulfhydryl reagent. Its actions are similar to those of iodoacetate.Sulfhydryl Compounds: Compounds containing the -SH radical.Taurine: A conditionally essential nutrient, important during mammalian development. It is present in milk but is isolated mostly from ox bile and strongly conjugates bile acids.Mercury: A silver metallic element that exists as a liquid at room temperature. It has the atomic symbol Hg (from hydrargyrum, liquid silver), atomic number 80, and atomic weight 200.59. Mercury is used in many industrial applications and its salts have been employed therapeutically as purgatives, antisyphilitics, disinfectants, and astringents. It can be absorbed through the skin and mucous membranes which leads to MERCURY POISONING. Because of its toxicity, the clinical use of mercury and mercurials is diminishing.Mass Spectrometry: An analytical method used in determining the identity of a chemical based on its mass using mass analyzers/mass spectrometers.Fluorescence Polarization: Measurement of the polarization of fluorescent light from solutions or microscopic specimens. It is used to provide information concerning molecular size, shape, and conformation, molecular anisotropy, electronic energy transfer, molecular interaction, including dye and coenzyme binding, and the antigen-antibody reaction.Suramin: A polyanionic compound with an unknown mechanism of action. It is used parenterally in the treatment of African trypanosomiasis and it has been used clinically with diethylcarbamazine to kill the adult Onchocerca. (From AMA Drug Evaluations Annual, 1992, p1643) It has also been shown to have potent antineoplastic properties.Troponin C: One of the three polypeptide chains that make up the TROPONIN complex of skeletal muscle. It is a calcium-binding protein.Temperature: 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.Phenols: Benzene derivatives that include one or more hydroxyl groups attached to the ring structure.Catalysis: The facilitation of a chemical reaction by material (catalyst) that is not consumed by the reaction.Protein Binding: 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.Mice, Inbred BALB CTryptophan: An essential amino acid that is necessary for normal growth in infants and for NITROGEN balance in adults. It is a precursor of INDOLE ALKALOIDS in plants. It is a precursor of SEROTONIN (hence its use as an antidepressant and sleep aid). It can be a precursor to NIACIN, albeit inefficiently, in mammals.Hydrogen Peroxide: A strong oxidizing agent used in aqueous solution as a ripening agent, bleach, and topical anti-infective. It is relatively unstable and solutions deteriorate over time unless stabilized by the addition of acetanilide or similar organic materials.Colitis, Ulcerative: Inflammation of the COLON that is predominantly confined to the MUCOSA. Its major symptoms include DIARRHEA, rectal BLEEDING, the passage of MUCUS, and ABDOMINAL PAIN.Oxidoreductases: The class of all enzymes catalyzing oxidoreduction reactions. The substrate that is oxidized is regarded as a hydrogen donor. The systematic name is based on donor:acceptor oxidoreductase. The recommended name will be dehydrogenase, wherever this is possible; as an alternative, reductase can be used. Oxidase is only used in cases where O2 is the acceptor. (Enzyme Nomenclature, 1992, p9)Cattle: Domesticated bovine animals of the genus Bos, usually kept on a farm or ranch and used for the production of meat or dairy products or for heavy labor.Polymers: Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).Urea: A compound formed in the liver from ammonia produced by the deamination of amino acids. It is the principal end product of protein catabolism and constitutes about one half of the total urinary solids.Basidiomycota: A phylum of fungi that produce their sexual spores (basidiospores) on the outside of the basidium. It includes forms commonly known as mushrooms, boletes, puffballs, earthstars, stinkhorns, bird's-nest fungi, jelly fungi, bracket or shelf fungi, and rust and smut fungi.Fluorescence: The property of emitting radiation while being irradiated. The radiation emitted is usually of longer wavelength than that incident or absorbed, e.g., a substance can be irradiated with invisible radiation and emit visible light. X-ray fluorescence is used in diagnosis.Amino Acid Sequence: 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.Rabbits: The species Oryctolagus cuniculus, in the family Leporidae, order LAGOMORPHA. Rabbits are born in burrows, furless, and with eyes and ears closed. In contrast with HARES, rabbits have 22 chromosome pairs.Rats, Wistar: A strain of albino rat developed at the Wistar Institute that has spread widely at other institutions. This has markedly diluted the original strain.Recombinant Proteins: Proteins prepared by recombinant DNA technology.Protein Structure, Secondary: 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.Structure-Activity Relationship: The relationship between the chemical structure of a compound and its biological or pharmacological activity. Compounds are often classed together because they have structural characteristics in common including shape, size, stereochemical arrangement, and distribution of functional groups.Chromatography, High Pressure Liquid: Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.Free Radicals: Highly reactive molecules with an unsatisfied electron valence pair. Free radicals are produced in both normal and pathological processes. They are proven or suspected agents of tissue damage in a wide variety of circumstances including radiation, damage from environment chemicals, and aging. Natural and pharmacological prevention of free radical damage is being actively investigated.Escherichia coli: A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc.Dithiothreitol: A reagent commonly used in biochemical studies as a protective agent to prevent the oxidation of SH (thiol) groups and for reducing disulphides to dithiols.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Anti-Inflammatory Agents: Substances that reduce or suppress INFLAMMATION.Spectrophotometry, Ultraviolet: 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)Enzyme Stability: The extent to which an enzyme retains its structural conformation or its activity when subjected to storage, isolation, and purification or various other physical or chemical manipulations, including proteolytic enzymes and heat.Molecular Sequence Data: 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.Dose-Response Relationship, Drug: The relationship between the dose of an administered drug and the response of the organism to the drug.Spectrophotometry: The art or process of comparing photometrically the relative intensities of the light in different parts of the spectrum.Magnetic Resonance Spectroscopy: 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).Mice, Inbred C57BLModels, Molecular: Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.Polyporales: An order of fungi in the phylum BASIDIOMYCOTA having macroscopic basidiocarps. The members are characterized by their saprophytic activities as decomposers, particularly in the degradation of CELLULOSE and LIGNIN. A large number of species in the order have been used medicinally. (From Alexopoulos, Introductory Mycology, 4th ed, pp504-68)Cytokines: Non-antibody proteins secreted by inflammatory leukocytes and some non-leukocytic cells, that act as intercellular mediators. They differ from classical hormones in that they are produced by a number of tissue or cell types rather than by specialized glands. They generally act locally in a paracrine or autocrine rather than endocrine manner.Intestines: The section of the alimentary canal from the STOMACH to the ANAL CANAL. It includes the LARGE INTESTINE and SMALL INTESTINE.Substrate Specificity: A characteristic feature of enzyme activity in relation to the kind of substrate on which the enzyme or catalytic molecule reacts.Phytotherapy: Use of plants or herbs to treat diseases or to alleviate pain.Liposomes: Artificial, single or multilaminar vesicles (made from lecithins or other lipids) that are used for the delivery of a variety of biological molecules or molecular complexes to cells, for example, drug delivery and gene transfer. They are also used to study membranes and membrane proteins.Chemistry: A basic science concerned with the composition, structure, and properties of matter; and the reactions that occur between substances and the associated energy exchange.Chromatography, Thin Layer: Chromatography on thin layers of adsorbents rather than in columns. The adsorbent can be alumina, silica gel, silicates, charcoals, or cellulose. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Chemical Phenomena: The composition, conformation, and properties of atoms and molecules, and their reaction and interaction processes.Inflammation Mediators: The endogenous compounds that mediate inflammation (AUTACOIDS) and related exogenous compounds including the synthetic prostaglandins (PROSTAGLANDINS, SYNTHETIC).Oxidative Stress: A disturbance in the prooxidant-antioxidant balance in favor of the former, leading to potential damage. Indicators of oxidative stress include damaged DNA bases, protein oxidation products, and lipid peroxidation products (Sies, Oxidative Stress, 1991, pxv-xvi).Lysine: An essential amino acid. It is often added to animal feed.Amino Acids: Organic compounds that generally contain an amino (-NH2) and a carboxyl (-COOH) group. Twenty alpha-amino acids are the subunits which are polymerized to form proteins.Tumor Necrosis Factor-alpha: Serum glycoprotein produced by activated MACROPHAGES and other mammalian MONONUCLEAR LEUKOCYTES. It has necrotizing activity against tumor cell lines and increases ability to reject tumor transplants. Also known as TNF-alpha, it is only 30% homologous to TNF-beta (LYMPHOTOXIN), but they share TNF RECEPTORS.Thermodynamics: 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)Spectrometry, Mass, Electrospray Ionization: A mass spectrometry technique used for analysis of nonvolatile compounds such as proteins and macromolecules. The technique involves preparing electrically charged droplets from analyte molecules dissolved in solvent. The electrically charged droplets enter a vacuum chamber where the solvent is evaporated. Evaporation of solvent reduces the droplet size, thereby increasing the coulombic repulsion within the droplet. As the charged droplets get smaller, the excess charge within them causes them to disintegrate and release analyte molecules. The volatilized analyte molecules are then analyzed by mass spectrometry.Electron Spin Resonance Spectroscopy: A technique applicable to the wide variety of substances which exhibit paramagnetism because of the magnetic moments of unpaired electrons. The spectra are useful for detection and identification, for determination of electron structure, for study of interactions between molecules, and for measurement of nuclear spins and moments. (From McGraw-Hill Encyclopedia of Science and Technology, 7th edition) Electron nuclear double resonance (ENDOR) spectroscopy is a variant of the technique which can give enhanced resolution. Electron spin resonance analysis can now be used in vivo, including imaging applications such as MAGNETIC RESONANCE IMAGING.
Respiratory chain strongly oxidizes the CXXC motif of DsbB in the Escherichia coli disulfide bond formation pathway. (1/630)Escherichia coli DsbB has four essential cysteine residues, among which Cys41 and Cys44 form a CXXC redox active site motif and the Cys104-Cys130 disulfide bond oxidizes the active site cysteines of DsbA, the disulfide bond formation factor in the periplasm. Functional respiratory chain is required for the cell to keep DsbA oxidized. In this study, we characterized the roles of essential cysteines of DsbB in the coupling with the respiratory chain. Cys104 was found to form the inactive complex with DsbA under respiration-defective conditions. While DsbB, under normal aerobic conditions, is in the oxidized state, having two intramolecular disulfide bonds, oxidation of Cys104 and Cys130 requires the presence of Cys41-Cys44. Remarkably, the Cys41-Cys44 disulfide bond is refractory to reduction by a high concentration of dithiothreitol, unless the membrane is solubilized with a detergent. This reductant resistance requires both the respiratory function and oxygen, since Cys41-Cys44 became sensitive to the reducing agent when membrane was prepared from quinone- or heme-depleted cells or when a membrane sample was deaerated. Thus, the Cys41-Val-Leu-Cys44 motif of DsbB is kept both strongly oxidized and strongly oxidizing when DsbB is integrated into the membrane with the normal set of respiratory components. (+info)
ApoB100 secretion from HepG2 cells is decreased by the ACAT inhibitor CI-1011: an effect associated with enhanced intracellular degradation of ApoB. (2/630)The concept that hepatic cholesteryl ester (CE) mass and the rate of cholesterol esterification regulate hepatocyte assembly and secretion of apoB-containing lipoproteins remains controversial. The present study was carried out in HepG2 cells to correlate the rate of cholesterol esterification and CE mass with apoB secretion by CI-1011, an acyl CoA:cholesterol acyltransferase (ACAT) inhibitor that is known to decrease apoB secretion, in vivo, in miniature pigs. HepG2 cells were incubated with CI-1011 (10 nmol/L, 1 micromol/L, and 10 micromol/L) for 24 hours. ApoB secretion into media was decreased by 25%, 27%, and 43%, respectively (P<0.0012). CI-1011 (10 micromol/L) inhibited HepG2 cell ACAT activity by 79% (P<0.002) and cellular CE mass by 32% (P<0.05). In contrast, another ACAT inhibitor, DuP 128 (10 micromol/L), decreased cellular ACAT activity and CE mass by 85% (P<0.002) and 42% (P=0.01), respectively, but had no effect on apoB secretion into media. To characterize the reduction in apoB secretion by CI-1011, pulse-chase experiments were performed and analyzed by multicompartmental modelling using SAAM II. CI-1011 did not affect the synthesis of apoB or albumin. However, apoB secretion into the media was decreased by 42% (P=0.019). Intracellular apoB degradation increased proportionately (P=0.019). The secretion of albumin and cellular reuptake of labeled lipoproteins were unchanged. CI-1011 and DuP 128 did not affect apoB mRNA concentrations. These results show that CI-1011 decreases apoB secretion by a mechanism that involves an enhanced intracellular degradation of apoB. This study demonstrates that ACAT inhibitors can exert differential effects on apoB secretion from HepG2 cells that do not reflect their efficacy in inhibiting cholesterol esterification. (+info)
Anaerobic oxidations of cysteate: degradation via L-cysteate:2-oxoglutarate aminotransferase in Paracoccus pantotrophus. (3/630)Anoxic, fresh-water enrichment cultures to oxidize different organosulfonates were set up with nitrate, ferric iron or sulfate as electron acceptors. Pure cultures were easily obtained with two naturally occurring sulfonates, cysteate (2-amino-3-sulfopropionate) and taurine (2-aminoethanesulfonate), under nitrate-reducing conditions. These two sulfonates were also oxidized during reduction of iron(III), though isolation of pure cultures was not successful. One nitrate-reducing cysteate-oxidizing bacterium, strain NKNCYSA, was studied in detail. It was identified as Paracoccus pantotrophus. Eighteen sulfonates were tested, and the organism degraded cysteate, taurine, isethionate (2-hydroxyethanesulfonate), sulfoacetate or 3-aminopropanesulfonate with concomitant reduction of nitrate, presumably to molecular nitrogen. The carbon skeleton of these substrates was converted to cell material and, presumably, CO2. The amino group was released as ammonia and the sulfono moiety was recovered as sulfate. Cell-free extracts of P. pantotrophus NKNCYSA contained constitutive L-cysteate:2-oxoglutarate aminotransferase (EC 2.6.1.-) and glutamate dehydrogenase (EC 188.8.131.52). Taurine:pyruvate aminotransferase, in contrast, was inducible. (+info)
Modulation of fibroblast growth factor-2 receptor binding, signaling, and mitogenic activity by heparin-mimicking polysulfonated compounds. (4/630)Basic fibroblast growth factor (FGF-2) interacts with high-affinity tyrosine-kinase fibroblast growth factor receptors (FGFRs) and low-affinity heparan sulfate proteoglycans (HSPGs) in target cells. Both interactions are required for FGF-2-mediated biological responses. Here we report the FGF-2 antagonist activity of novel synthetic sulfonic acid polymers with distinct chemical structures and molecular masses (MMs). PAMPS [poly(2-acrylamido-2-methyl-1-propanesulfonic acid)], (MM approximately 7,000-10,000), PAS [poly(anetholesulfonic acid)], (MM approximately 9,000-11,000), PSS [poly(4-styrenesulfonic acid)], (MM = 70,000), and poly(vinylsulfonic acid) (MM = 2,000), inhibited FGF-2 binding to HSPGs and FGFRs in fetal bovine aortic endothelial GM 7373 cells. They also abrogated the formation of the HSPG/FGF-2/FGFR ternary complex, as evidenced by their capacity to prevent FGF-2-mediated cell-cell attachment of FGFR-1-overexpressing, HSPG-deficient Chinese hamster ovary cells to wild-type HSPG-bearing cells. Direct interaction of the polysulfonates with FGF-2 was demonstrated by their ability to protect the growth factor from proteolytic cleavage. Accordingly, molecular modeling, based on the crystal structure of the interaction of FGF-2 with a heparin hexamer, showed the feasibility of docking PAMPS into the heparin-binding domain of FGF-2. In agreement with their FGF-2-binding capacity, PSS, PAS, and PAMPS inhibited FGF-2-induced cell proliferation in GM 7373 cells and murine brain microvascular endothelial cells. The antiproliferative activity of these compounds was associated with the abrogation of FGF-2-induced tyrosine phosphorylation of FGFR-1. Moreover, the polysulfonates PSS and PAS inhibited FGF-2-induced activation of mitogen-activated protein kinase-1/2, involved in FGF-2 signal transduction. In conclusion, sulfonic acid polymers bind FGF-2 by mimicking heparin interaction. These compounds may provide a tool to inhibit FGF-2-induced endothelial cell proliferation in angiogenesis and tumor growth. (+info)
Inhibition of ACAT by avasimibe decreases both VLDL and LDL apolipoprotein B production in miniature pigs. (5/630)An orally bioavailable acyl coenzyme A:cholesterol acyltransferase (ACAT) inhibitor, avasimibe (CI-1011), was used to test the hypothesis that inhibition of cholesterol esterification, in vivo, would reduce hepatic very low density (VLDL) apolipoprotein (apo) B secretion into plasma. ApoB kinetic studies were carried out in 10 control miniature pigs, and in 10 animals treated with avasimibe (10 mg/kg/d, n = 6; 25 mg/kg/d, n = 4). Pigs were fed a diet containing fat (34% of calories) and cholesterol (400 mg/d; 0.1%). Avasimibe decreased the plasma concentrations of total triglyceride, VLDL triglyceride, and VLDL cholesterol by 31;-40% 39-48%, and 31;-35%, respectively. Significant reductions in plasma total cholesterol (35%) and low density lipoprotein (LDL) cholesterol (51%) concentrations were observed only with high dose avasimibe. Autologous 131I-labeled VLDL, 125I-labeled LDL, and [3H]leucine were injected simultaneously into each pig and apoB kinetic data were analyzed using multicompartmental analysis (SAAM II). Avasimibe decreased the VLDL apoB pool size by 40;-43% and the hepatic secretion rate of VLDL apoB by 38;-41%, but did not alter its fractional catabolism. Avasimibe decreased the LDL apoB pool size by 13;-57%, largely due to a dose-dependent 25;-63% in the LDL apoB production rate. Hepatic LDL receptor mRNA abundances were unchanged, consistent with a marginal decrease in LDL apoB FCRs. Hepatic ACAT activity was decreased by 51% (P = 0.050) and 68% (P = 0.087) by low and high dose avasimibe, respectively. The decrease in total apoB secretion correlated with the decrease in hepatic ACAT activity (r = 0.495; P = 0.026). We conclude that inhibition of hepatic ACAT by avasimibe reduces both plasma VLDL and LDL apoB concentrations, primarily by decreasing apoB secretion. (+info)
Low-molecular-weight sulfonates, a major substrate for sulfate reducers in marine microbial mats. (6/630)Several low-molecular-weight sulfonates were added to microbial mat slurries to investigate their effects on sulfate reduction. Instantaneous production of sulfide occurred after taurine and cysteate were added to all of the microbial mats tested. The rates of production in the presence of taurine and cysteate were 35 and 24 microM HS(-) h(-1) in a stromatolite mat, 38 and 36 microM HS(-) h(-1) in a salt pond mat, and 27 and 18 microM HS(-) h(-1) in a salt marsh mat, respectively. The traditionally used substrates lactate and acetate stimulated the rate of sulfide production 3 to 10 times more than taurine and cysteate stimulated the rate of sulfide production in all mats, but when ethanol, glycolate, and glutamate were added to stromatolite mat slurries, the resulting increases were similar to the increases observed with taurine and cysteate. Isethionate, sulfosuccinate, and sulfobenzoate were tested only with the stromatolite mat slurry, and these compounds had much smaller effects on sulfide production. Addition of molybdate resulted in a greater inhibitory effect on acetate and lactate utilization than on sulfonate use, suggesting that different metabolic pathways were involved. In all of the mats tested taurine and cysteate were present in the pore water at nanomolar to micromolar concentrations. An enrichment culture from the stromatolite mat was obtained on cysteate in a medium lacking sulfate and incubated anaerobically. The rate of cysteate consumption by this enrichment culture was 1.6 pmol cell(-1) h(-1). Compared to the results of slurry studies, this rate suggests that organisms with properties similar to the properties of this enrichment culture are a major constituent of the sulfidogenic population. In addition, taurine was consumed at some of highest dilutions obtained from most-probable-number enrichment cultures obtained from stromatolite samples. Based on our comparison of the sulfide production rates found in various mats, low-molecular-weight sulfonates are important sources of C and S in these ecosystems. (+info)
Antioxidant activity: what do we measure? (7/630)Inhibition of oxidation of 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) by free radicals generated by decomposition of 2,2'-azobis(2-amidopropane) (ABAP) by antioxidants and biological material was studied. A correlation was found between the ability of various substances to delay the onset of ABTS oxidation and their rapid reduction of the ABTS+* cation radical, and between the ability to reduce the maximal rate of ABTS oxidation and slow reduction of ABTS+*. The length of the lag period of ABTS oxidation was found to be independent of ABTS concentration. Similar decrease of peroxynitrite-induced ABTS+* formation by antioxidants was observed when the antioxidants were added before and after peroxynitrite. All these findings indicate that the main effect of antioxidants in this system is reduction of ABTS+* and not prevention of its formation. Reduction of oxidation products rather than inhibition of their formation may be the predominant mode of action of antioxidants in various assays of antioxidant activity. (+info)
Malaria vectors in a traditional dry zone village in Sri Lanka. (8/630)Malaria transmission by anopheline mosquitoes was studied in a traditional tank-irrigation-based rice-producing village in the malaria-endemic low country dry zone of northcentral Sri Lanka during the period August 1994-February 1997. Adult mosquitoes were collected from human and bovid bait catches, bovid-baited trap huts, indoor catches, and pit traps. Mosquito head-thoraces were tested for the presence of Plasmodium falciparum and P. vivax, and blood-engorged abdomens for the presence of human blood by ELISAs. House surveys were done at two-day intervals to record cases of blood film-confirmed malaria among the villagers. A total of 7,823 female anophelines representing 14 species were collected. Trends in anopheline abundance were significantly correlated with rainfall of the preceding month in An. annularis, An. barbirostris, An. subpictus, An. vagus, and An. varuna, but were not significant in An. culicifacies and An. peditaeniatus. Malaria parasite infections were seen in seven mosquito species, with 75% of the positive mosquitoes containing P. falciparum and 25% P. vivax. Polymorph PV247 was recorded from a vector (i.e., An. varuna) for the first time in Sri Lanka. Computations of mean number of infective vector (MIV) rates using abundance, circumsporozoite (CS) protein rate, and human blood index (HBI) showed the highest rate in An. culicifacies. A malaria outbreak occurred from October 1994 to January 1995 in which 45.5% of village residents experienced at least a single disease episode. Thereafter, malaria incidence remained low. Anopheles culicifacies abundance lagged by one month correlated positively with monthly malaria incidence during the outbreak period, and although this species ranked fifth in terms of abundance, infection was associated with a high MIV rate due to a high CS protein rate and HBI. Abundance trends in other species did not correlate significantly with malaria. It was concluded that An. culicifacies was epidemiologically the most important vector in the study area. (+info)
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2,2'-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt(250-396-6) - Creative Enzymes
2,2-Azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) is a peroxidase substrate suitable for use in ELISA procedures. This substrate produces a soluble end product that is green in color and can be read spectrophotometrically at 405 nm. The reaction may be stopped with 1% sodium dodecyl sulfate (SDS). Recommended for ELISA (microwell) procedures, not recommended for membrane applications ...
Acute and chronic effects of standard sodium alkyl benzene sulfonate upon the pumpkinseed sunfish, Lepomis gibbosus (Linn.) and...
The Acute and Chronic Effects of Standard Sodium Alkyl Benzene Sulfonate Upon the Pumpkinseed Sunfish, Lepomis gibbosus (Linn.) and the Bluegill Sunfish L. macrochirus Raf. J. CAIRNS, JR., Curator and A. SCHEIER, Biologist Department of Limnology Academy of Natural Sciences Philadelphia, Pennsylvania A number of comparatively recent publications have noted the striking expansion in use of synthetic detergents which has occurred in the past 12 years (1,2,3,4,5). The most common active agent in these detergents is alkyl benzene sulfonate (ABS); Vaughn (5) and Hammerton (6) have indicated that synthetic detergents occur persistently in a variety of natural waters. Thus, it is quite likely that fish and other aquatic organisms will be continuously exposed to these materials except in areas quite remote from civiliza - tion. The purpose of the experiments reported in this paper was to determine the chronic or long-term effects of "sublethal" concentrations of ABS upon the ability of sunfish to ...
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Patent US5177203 - Rapamycin 42-sulfonates and 42-(N-carboalkoxy) sulfamates useful as ... - Google Patentsuche
A derivative of rapamycin of general formula (I) ##STR1## where R1 is alkyl, alkenyl, or alkynyl containing 1 to 6 carbon atoms; or an aromatic moiety selected from the group consisting of phenyl and naphthyl or a heterocyclic moiety selected from the group consisting of thiophenyl and quinolinyl or NHCO2 R2 wherein R2 is lower alkyl containing 1 to 6 carbon atoms or a pharmaceutically acceptable salt thereof, which by virtue of its immunosuppressive activity is useful in treating transplantation rejection, host versus graft disease, autoimmune diseases, and diseases of inflammation.
ChemIDplus - 94349-56-1 - SHUSBRIWJQXMNB-XGMLEZCSSA-N - Adenosine, adenylyl-(3'.5')-adenylyl-(3'.5')-, diammonium salt -...
Reactions of 2,2'-Azinobis-(3-ethylbenzthiazoline-6-sulfonate) dianion, ABTS 2- , with • OH, (SCN) 2 •-...
3dd8 - Proteopedia, life in 3D
The new antitumor sulfamate EMD 486019 was investigated for its interaction with twelve catalytically active mammalian carbonic anhydrase (CA, EC 184.108.40.206) isozymes, hCA I - XIV. Similarly to 667-Coumate, a structurally related compound in phase II clinical trials as steroid sulfatase/CA inhibitor with potent antitumor properties, EMD 486019 acts as a strong inhibitor of isozymes CA II, VB, VII, IX, XII, and XIV (K(I)s in the range of 13-19nM) being less effective against other isozymes (K(I)s in the range of 66-3600nM against hCA I, IV, VA, VI, and mCA XIII, respectively). The complete inhibition profile of 667-Coumate against these mammalian CAs is also reported here for the first time. Comparing the X-ray crystal structures of the two adducts of CA II with EMD 486019 and 667-Coumate, distinct orientations of the bound sulfamates within the enzyme cavity were observed, which account for their distinct inhibition profiles. CA II/IX potent inhibitors belonging to the sulfamate class are thus ...
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CAS No.68201-32-1,Asphalt,sulfonated, sodium salt Suppliers
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DIGITAL.CSIC: Combined Alkyl and Sulfonic Acid Functionalization of MCM-41-Type Silica: Part 2. Esterification of Glycerol with...
The esterification of glycerol with lauric and oleic acids (1 : 1 molar ratio) has been carried out by using hybrid MCM-41 materials containing simultaneously alkyl (methyl or propyl) and sulfonic acid groups as catalysts. It has been found that for each fatty acid the catalyst activity is affected by the concentration of methyl groups, and maximum activity per sulfonic acid group is achieved by tuning the methyl/sulfonic acid ratio. A monolaurin yield of 63% is obtained with the most active catalyst, whereas for oleic acid the maximum monoolein yield was 45%. Reduction of the average pore size (determined by N2 adsorption) from 14 to below 10 Å has a detrimental influence on the catalyst activity for both acids ...
1-AMINO-2-NAPHTHOL-4-SULFONIC ACID 567-13-5 H-NMR | C-NMR Spectral Analysis NMR Spectrum
2-Phenylbenzimidazole-5-sulfonic acid 27503-81-7 Chemical Properties Physical Properties
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Patent US5093126 - Glaucoma formulations comprising an anionic, polysulfonic acid polymer ... - Google Patents
Disclosed are nonstinging, sustained release ophthalmic formulations. The formulations comprise a cationic drug, an acidic mucomimetic polymer and a polystyrene sulfonic acid polymer. In particular, formulations for the control of intraocular pressure and glaucoma are disclosed. Methods for use of the formulations are also disclosed.
China Water Treatment /Acrylic Acid-2-Acrylamido-2-Methylpropane Sulfonic Acid Copolymer (AA/AMPS) 40.0% Min, 90.0% - China AA...
China Water Treatment /Acrylic Acid-2-Acrylamido-2-Methylpropane Sulfonic Acid Copolymer (AA/AMPS) 40.0% Min, 90.0%, Find details about China AA-AMPS, 40623-75-4 from Water Treatment /Acrylic Acid-2-Acrylamido-2-Methylpropane Sulfonic Acid Copolymer (AA/AMPS) 40.0% Min, 90.0% - Shanghai Smart Chemicals Co.,Ltd.
MEDLINE - Resultado p gina 1
Herbal medicine is an important part of health care system in most of the countries. Rubus fairholmianus is an unexplored berry in folkloric medicine. In this study, we aimed to understand the importance of R. fairholmianus in pharmaceutical industry for the development of cost-effective cancer therapeutic drugs using in vivo and in vitro analysis. Chemical characterization, antioxidant, antiproliferative and apoptosis inducing properties of R. fairholmianus root methanolic column subfraction (RFM) were investigated. The RFM displayed the presence of alpha-tocopherol, flavonol glycoside and apigenin in the chemical characterization. DPPH (2, 2-diphenyl-1-picrylhydrazyl) and ABTS (2, 2-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid)) radical scavenging assays exhibited an activity of 7.56 g/mL (IC ) and 20514.7 M trolox equivalents/g respectively. The solid and ascites tumors in mice were reduced significantly upon 100 mg/kg RFM treatment by reducing the tumor volume (1.86 cm ), tumor weight ...
5,5'-Bis-1H-tetrazole diammonium salt - Registration Dossier - ECHA
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice ...
Dokument bez názvu
In the food industry, in the process of creating new agricultural plant products, and in the testing of anti-cancer drugs there is often a need to assay multiple samples of low molecular weight antioxidants, plant samples and foods rich in antioxidants, with minimal additional costs and low degrees of uncertainty. With these demands in mind, we decided to study the fully automated assay of antioxidants using not only automated sample measurements but also automated processing of samples and application of reagents. The automated pipetting system epMotion 5075 and the automated spectrophotometer BS 400 were chosen for the assay purposes. Five methods were introduced for the automation: 2-diphenyl-1-picrylhydrazyl (DPPH) test, ferric reducing antioxidant power (FRAP) method, 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) based test, N,N-dimethyl-1,4-diaminobenzene (DMPD) based test and the Free Radicals method. Samples containing one of the four antioxidants (standard rutin, ...
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Hydrolysis o f the original sample to the corresponding carbamate, G T X 3 (5), w o u l d increase the toxicity o f the sample 6-fold, to 1400 mouse units. Subsequent epimerization o f the hydrolysate, 5, to a 4:1 mixture o f the carbamates GTX2 (3) and 5 (or hydrolysis o f the epimeric sulfamates 4 and 6 to the same mixture o f carbamates) w o u l d then change the toxicity to 1,120 mouse units. T h e observed toxicity and composition o f the hypothetical sample w h i c h started as pure 6 may l i e anywhere w i t h i n the indicated bounds as these interconversions occur. It can be increased at any point by hydrolysis, toward the toxicity shown o n the upper line. T h e highest toxicity w i l l be attained i f the hydrolysis is performed o n 6 prior to epimerization, resulting i n 5. Hydrolysis o f the epimeric 4 and 6, o r epimerization o f the hydrolysate, will ultimately result i n a stable, equilibrated mixture o f the epimers 3 and 5, with a slightly lower toxicity. T h e hypothetical ...
7-Amino-4-hydroxy-3-[(4-methoxy-2-sulfophenyl)azo]naphthalene-2-sulfonic acid - Alfa Chemistry
Revisiting of Boron Sulfonic Acid Applications in Organic Synthesis: Mini-Review
1,4-dihydroquinazoline-4-sulfonic acid | C8H8N2O3S - PubChem
SPECTRUM P Anisidine Sulfonic Acid,25g - 26WZ13|A1177-5G - Grainger
ChemIDplus - 3934-16-5 - XEEYSDHEOQHCDA-UHFFFAOYSA-N - 2-Methylprop-2-ene-1-sulfonic acid - Similar structures search, synonyms...
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Korean Journal of Crop Science
시중 유통 혼합잡곡 첨가 취반 밥 에탄올 추출물에 대한 radical 소거활성은 항산화물질에 의해 환원되어 짙은 자색 이 탈색됨으로써 항산화 물질의 전자공여능을 측정할 때 사용되고 있는 DPPH radical 소거활성(Nieva et al., 2000) 과 혈장에서 ABTS radical의 흡광도가 항산화제에 의해 억 제되는 것에 기초하여 개발된 ABTS radical 소거활성(Kim et al., 2009)을 측정한 결과 Fig. 4 및 Table 4와 같이 나타 났다. 전자공여능은 지질과산화의 연쇄반응에 관여하는 free radical에 전자를 공여하여 산화를 억제시키는 척도가 되며, free radical은 인체 내에서 각종질병과 세포의 노화를 일으 키므로 식물 추출물 등에서 항산화제로 작용할 수 있는 물질 을 확인할 필요성이 있다(Kim et al., 2009). 일반밥솥과 압 력밥솥으로 취반한 백미 추출물의 DPPH radical 소거활성은 각각 3.15±0.04 및 3.71±0.07 mg ...
Design and application of esterase-labile sulfonate protecting groups - Chemical Communications (RSC Publishing)
Journal: Journal of the science of food and agriculture / Publication Year: 2016 / Source: 2016 v.96 no.15 / Text Availability:...
BACKGROUND: To elucidate whether and how alkali treatment, which is a common process for rice protein (RP) extraction, affects antioxidant activity of RP, the different degree of alkali (from 0.1% to 0.4% of NaOH) was used to extract RP (RP‐1, RP‐2, RP‐3, RP‐4). RESULTS: The antioxidant capacities of scavenging free radicals [2,2′‐azinobis(3‐ethylbenzothiazoline‐6‐sulfonic acid] diammonium salt, A ...
Synthesis and biochemical evaluation of a range of sulfonated derivatives of 4-hydroxybenzyl imidazole as highly potent...
Ahmed, Sabbir, Shahid, Imran, Dhanani, Sachin and Owen, Caroline P. (2009) Synthesis and biochemical evaluation of a range of sulfonated derivatives of 4-hydroxybenzyl imidazole as highly potent inhibitors of rat testicular 17 alpha-hydroxylase/17,20-lyase (P-450(17 alpha)). Bioorganic & Medicinal Chemistry Letters, 19(16), pp. 4698-4701. ISSN (print) 0960-894X ...
Patent US4360512 - Nonabrasive gel formulations of sulfonated poly(arylene ether sulfone ... - Google Patents
Compositions for preventing the attachment of dental plaque to the surfaces of the teeth comprise certain sulfonated poly(arylene ether sulfone) polymers and the pharmaceutically acceptable salts thereof in a pharmaceutically acceptable nonabrasive gel vehicle comprising a selected polyoxypropylene/polyoxyethylene block copolymer as the principal gelling agent.
The 1/1/1 adduct hydrate of 8-hydroxy-7-iodoquinoline-5-sulfonic acid (ferron) with urea
The crystal structure of 8-hydroxy-7-iodoquinoline-5-sulfonic acid-urea-water, C9H6INO4S烈4N2O爲O, shows the zwitterionic (quinoline-sulfonate group) ferron molecule lying in a crystallographic mirror plane which related two of the sulfonate O atoms. Both the urea and the water molecule lie across the same plane and are inter-associated with the ferron molecules both within and between the planes by extensive hydrogen bonding, involving most available donor and acceptor sites on all three molecules. This includes a cyclic R22(8) sulfonate-urea association. The result is a three-dimensional layered structure ...
Staff Profiles - NUI Galway
Spillane, W.J.,Birch, G.G.,Drew, M.G.B.,Bartolo, I. (1992) Correlation of computed van der Waals and molecular volumes with Apparent Molar Volumes (AMV) for amino acid, carbohydrate and sulfamate tastant molecules. Relationship between Corey-Pauling-Koltun volumes (VCPK) and computed volumes. Journal of the Chemical Society, Perkin Transactions 2, (4) [Details] ...
Sulfonic acids, C14-17-sec-alkane, sodium salts - Registration Dossier - ECHA
2,4-diaminobenzene-1-sulfonic acid | World Chem Corporation -Dyes and lovejet爱博官网 suppliers - lovejet爱单宔罗,爱单诘俜罗抑预寸耉
Molecular Weight : 188 grams/mole. Empirical Formula : C6 H8 O3 N2 S. Purity : Min. 98.00%. Insoluble Content : Max. 0.20%. Moisture : Max. 0.30%. Other impurities : Max. 0.10%. Solubility : Soluble In Alkaline Water. Physical appearance : Light gray White powder. Basis of Sale : On As Is basis. Packing : 25/50kgs HDPE bags with double liners inside. ...
VINYL SULFONIC ACID 30% (Vinils lfonik asit)
Solutions are stable at 2-8 °C for months. Autoclaving is not recommended for any sulfonic acid buffer. When MES solutions are autoclaved, they turn yellow (although pH does not change measurably). The identity of the yellow breakdown product is unknown. When MES solutions are stored at room temperature, they can turn yellow within six months ...
Documents | King Industries, Inc.
NACURE 5414 is a polymeric blocked sulfonic acid ester catalyst recommended for use with amino crosslinking resins. It provides low conductivity essential for electrostatic spray applications and better solubility and humidity resistance in comparison to amine blocked catalysts. The polymeric portion remains in the film and is capable of reacting with the amino resin ...
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Biosynthesis of amino acid functionalized silver nanoparticles for potential catalytic and oxygen sensing applications -...
A green approach to the biosynthesis of amino acid functionalized silver nanoparticles (AgNPs) using Neem gum is reported herein. To the best of our knowledge, this is the first attempt at biosynthesizing AgNPs. The AgNPs show good colloidal stability with surfactants and dyes. The reduction of Methylene blue (MB)
Effect of biological slime on the retention of alkyl benzene sulfonate on granular media :: Engineering Technical Reports...
Effect of Biological Slime on the Retention of Alkyl Benzene Sulfonate on Granular Media B. B. EWING, Professor of Sanitary Engineering S. K. BANERJI, Research Assistant Department of Civil Engineering University of Illinois Urbana, Illinois The use of synthetic detergents has greatly increased since their advent about 15 years ago. These detergents have, of necessity, been discarded with waste waters to the environment. Because the surface active agents in the packaged product, unlike soaps, are not readily degraded by bacteria in soil, streams, and sewage treatment plants, the pollution of the aqueous environment has been recognized as a serious problem almost since the first inception of their use. The complaints have included frothing in waste treatment plants and streams as well as taste and odor problems and foaming of drinking water taken from grossly polluted streams. Not until 1958 were there instances of contamination of ground water reported (1). Since this time there have been ...
30931-67-0/ABTS 2,2 -Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt
IJMS | Free Full-Text | Proximate Composition and Antioxidant Potential of Leaves from Three Varieties of Mulberry (Morus sp.):...
In this study, leaves of three indigenous varieties of Mulberry namely, Morus alba L., Morus nigra L. and Morus rubra L. were investigated for their antioxidant potential and their proximate composition was determined. The yields of 80% methanolic extracts ranged between 8.28-13.89%. The contents of total phenolics (TPC), total flavonoids (TFC) and ascorbic acid (AA) ranged between 16.21-24.37 mg gallic acid equivalent (GAE)/g, 26.41-31.28 mg rutin equivalent (RE)/g and 0.97-1.49 mg/g, respectively. The antioxidant activity of leaf extracts was evaluated by measuring 1,1-diphenyl-2-picrylhydrazyl (DPPH•) radical scavenging actity, 2,2-azino-bis-(3-ethylbenzthiazoline-6-sulphonic acid (ABTS•+) radical cation scavenging capacity and ferric ion reducing power and values ranged between 1.89-2.12, 6.12-9.89 and 0.56-0.97 mM Trolox equivalent/g of dried leaves, respectively. The investigated features reveal good nutritive and antioxidant attributes of all the varieties with mutually significant
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Benzene Sulfonic Acid Market Growth Forecast and Trend Analysis by Regions from 2016-2021 | Press Releases
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Adsorptive molecularly imprinted composite membranes for chiral separation of phenylalanine - Polish Journal of Chemical...
Two types of composite imprinted membranes, i.e., composite membrane comprised of D-Phe imprinted beads and D-Phe imprinted membrane or DCM and composite membrane comprised of L-Phe imprinted beads and L-Phe imprinted membranes or LCM, were synthesized by phase inversion technique after a uniform dispersion of beads within the polymeric solutions using simple physico-mechanical process. The assemblies of the prepared DCM, LCM and control membranes were employed in ultrafiltration for chiral separation of D, L-Phenylalanine racemate solution. DCM and LCM showed an improved adsorption capacity (0.334 mg g-1 and 0.365 mg g-1 respectively), and adsorption selectivity (2.72 and 2.98 respectively). However, the percent rejection of the template and counter enantiomer were lower than that of control membranes. Compared to control membrane, the DCM and LCM showed inverse permselectivity. These composite membranes having better adsorption and separation ability for Phenylalanine racemate solution will be ...
Separation of Hydrogen Using an Electroless Deposited Thin-Film Palladium-Ceramic Composite Membrane - Digital Library
The primary objective of this project was to prepare and characterize a hydrogen permselective palladium-ceramic composite membrane for high temperature gas separations and catalytic membrane reactors. Electroless plating method was used to deposit a thin palladium film on microporous ceramic substrate. The objective of this paper is to discuss the preparation and characterization of a thin-film palladium-ceramic composite membrane for selective separation of hydrogen at elevated temperatures and pressures. In this paper, we also present a model to describe the hydrogen transport through the palladium-ceramic composite membrane in a cocurrent flow configuration.
Altmetric - Sulphonation Technology in the Detergent Industry
Name: 5-Hydroxynaphthalene-1-sulfonic acid CA Name: 1-Naphthalenesulfonic,5-hydroxy- Molecular Structure: 5-Hydroxynaphthalene-1-sulfonic acid,1-Naphthalenesulfonic,5-hydroxy-,CAS 117-59-9,224.23,C10H8O4S 5-Hydroxynaphthalene-1-sulfonic acid,1-Naphthalenesulfonic,5-hydroxy-,CAS 117-59-9,224.23,C10H8O4S Molecular Formula:C10H8O4S Molecular Weight: 224.23 CAS Registry Number: 117-59-9
Para Toluene Sulfonic Acid - Manufacturers, Suppliers & Exporters in India
Buy Sulfonated Asphalt Drilling Mud Chemical Material Price,Size,Weight,Model,Width -Okorder.com
Linear Alkyl Benzene Sulfonic Acid Slurry Powder Price Labsa 96% Fiyat Manufacturer - Buy Labsa 96%,Linear Alkyl Benzene...
Linear Alkyl Benzene Sulfonic Acid Slurry Powder Price Labsa 96% Fiyat Manufacturer , Find Complete Details about Linear Alkyl Benzene Sulfonic Acid Slurry Powder Price Labsa 96% Fiyat Manufacturer,Labsa 96%,Linear Alkyl Benzene Sulphonic Acid,Labsa from Organic Acid Supplier or Manufacturer-Henan Prochemie Technology Co., Ltd.
4 Chloro 2 Amino Phenol 6 Sulphonic Acid - 4 Chloro 2 Amino Phenol 6 Sulphonic Acid Exporter, Importer, Service Provider,...
Preparation of highly active triflic acid functionalized SBA-15 catalysts for the synthesis of coumarin under solvent free...
Journal of Korean Medicine Rehabilitation
Methods Experimental animals were divided into four groups: normal group without any treatment (Normal), contral group were treated orally with distilled water (Control), Experimental group were treated orally with JGS at a concentration of 200 mg/kg/day (JGS 200) and Experimental group were treated orally with JGS at a concentration of 200 mg/kg/day (JGS 400). Rats in each group except the normal group were induced fractures in the skull. ＜In vitro＞ The 1,1-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity and 2,2-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS) radical scavenging activity were measured to evaluate antioxidant activity. The production of nitric oxide (NO), interleukin- 1β (IL-1β), interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) in the RAW 264.7 cells were measured to evaluate anti-inflammatory activity. ＜In vivo＞ The production of osteocalcin calcitonin, carboxy-terminal telepeptides of type II collagen (CTX II), transforming growth ...
ABTS - Wikipedia
This compound is chosen because the enzyme facilitates the reaction with hydrogen peroxide, turning it into a green and soluble end-product. Its new absorbance maximum of 420 nm light (ε = 3.6 × 104 M-1 cm-1) can easily be followed with a spectrophotometer, a common laboratory instrument. It is sometimes used as part of a glucose estimating reagent when finding glucose concentrations of solutions such as blood serum. ABTS is also frequently used by the food industry and agricultural researchers to measure the antioxidant capacities of foods. In this assay, ABTS is converted to its radical cation by addition of sodium persulfate. This radical cation is blue in color and absorbs light at 734 nm. The ABTS radical cation is reactive towards most antioxidants including phenolics, thiols and Vitamin C. During this reaction, the blue ABTS radical cation is converted back to its colorless neutral form. The reaction may be monitored spectrophotometrically. This assay is often referred to as ...
China linear alkaline benzene sulfonic acid Manufacturers & Suppliers - Factory Supply linear alkaline benzene sulfonic acid...
2-(4-Aminophenyl)-6-hydroxynaphtho[2,1-d]thiazole-8-sulfonic acid - Alfa Chemistry
Morpholinopropane sulfonic acid (CAS 1132-61-2) Market Research Report 2018
Membranes | Free Full-Text | Friedel-Crafts Crosslinked Highly Sulfonated Polyether Ether Ketone (SPEEK) Membranes for a...
Highly conductive and low vanadium permeable crosslinked sulfonated poly(ether ether ketone) (cSPEEK) membranes were prepared by electrophilic aromatic substitution for a Vanadium/Air Redox Flow Battery (Vanadium/Air-RFB) application. Membranes were synthesized from ethanol solution and crosslinked under different temperatures with 1,4-benzenedimethanol and ZnCl2 via the Friedel-Crafts crosslinking route. The crosslinking mechanism under different temperatures indicated two crosslinking pathways: (a) crosslinking on the sulfonic acid groups; and (b) crosslinking on the backbone. It was observed that membranes crosslinked at a temperature of 150 °C lead to low proton conductive membranes, whereas an increase in crosslinking temperature and time would lead to high proton conductive membranes. High temperature crosslinking also resulted in an increase in anisotropy and water diffusion. Furthermore, the membranes were investigated for a Vanadium/Air Redox Flow Battery application. Membranes crosslinked at
Lubricating Compositions - Patent application
0074] A sulphonate detergent with 500 TBN and its preparation are disclosed in U.S. Pat. No. 5,792,732. In Example 2 thereof, a 500 TBN all-linear alkylbenzene sulphonate is prepared by reacting an alkyl benzene sulphonate from Witco Corp. (now known as Crompton) with Ca(OH)2 and CaO in n-heptane and methanol and bubbling with CO2. It is also reported in the aforementioned patent (col. 5) that a 500 TBN overbased sulphonate containing highly branched alkylbenzene sulphonate is available from Witco Corp. (now known as Crompton) as Petronate® C-500. Another method for preparing an overbased sulphonate detergent of high metal ratio is disclosed in U.S. Pat. No. 6,444,625 (see, for instance, column 3, bottom). The latter process includes providing a sulphonic acid to a reactor, adding a lime reactant for neutralization and overbasing, adding a lower aliphatic C1 to C4 alcohol and a hydrocarbon solvent, and carbonating the process mixture with carbon dioxide during which process the exotherm of the ...
Assay of lactoperoxidase activity
Peroxidases catalyse reactions in which hydrogen peroxide is reduced and a suitable electron donor is subsequently oxidised. Most assays are based on the principle that the electron donor in oxidised form absorbs light and can be determined by a spectrophotometric assay. Currently 2, 2-azino-di-3-ethylbenzthiazoline-6-sulphonic acid (ABTS) is accepted as the electron donor of choice for peroxidase assay.
Toluene-4-sulphonic acid - Registration Dossier - ECHA
A single, non-guideline study published in 1966. A soil microorganism inoculum was used in an aerobic water-based medium at 25C. Duplicate flasks of a single test substance concentration, 75 mg/L hydroxybenzene sulfonic acid, were sampled and analyzed over 64 days for change in spectral absorbance as the measure of test substance presence. An abiotic control using HgCl2 was run in parallel. The time necessary for complete degradation was 32 days. The degradation was due to biological activity because no decreased absorbance was seen in the abiotic control. The half-life of the test substance under the conditions of this study would be less than 32 days. This is a non-guideline study, however, the study design is sufficiently representative and there are sufficient details to support a conclusion that the test substance, hydroxybenzene sulfonic acid is biodegradable under aerobic soil conditions. The study is considered to be of value in providing weight of evidence to support this conclusion. ...
Hexane-1-sulfonic acid sodium salt CAS 2832-45-3 | 118305
Chemical Database: Alkenes, C14-16 Alpha-, Sulfonated, Sodium Salts (EnvironmentalChemistry.com)
Hot Sale Sulfonated Melamine Formaldehyde Superplasticizer For Concrete, View melamine formaldehyde sulfonate resin, HUADI...
3-Methyl-1-sulfonic Acid Imidazolium Mesylate as a Novel, Highly Effective and Dual-functional Catalyst for the Solvent-free...
A novel ionic liquid entitled 3-methyl-1-sulfonic acid imidazolium mesylate ([Msim][OMs]) was synthesized, and characterized by studying its FT-IR, 1H NMR, 13C NMR and mass spectra. This ionic liquid was employed as a dual-functional catalyst for the preparation of bis-coumarins via the one-pot pseudo three-component reaction of 4-hydroxycoumarin (2 eq.) and arylaldehydes (1 eq.) under solvent-free and relatively mild conditions. Owing to dual-functionality of [Msim][OMs] (having acidic and basic sites), it could act as a highly effective catalyst for the reaction. Additionally, an attractive mechanism based on dual-functionality of the catalyst was proposed.
China Linear Alkyl Benzene Sulfonic Acid /LABSA Photos & Pictures - Made-in-china.com
2 - Acrylamido-2 Methylpropane sulfonic acid applications | Medicine raw materials
2 - Acrylamido--2 Methylpropane sulfonic acid as a white apparent powder, melting point 185 ℃, hardly sour, with a able hygroscopicity. Such as damp, AMPS monomer cocky polymerization can occur. Its baptize band-aid is acidity, acrid in two methyl amide, partially acrid in methanol, ethanol, baffling in acetone. Stable at allowance temperature. In aqueous solution, monomer…
Overview of Global Benzene Sulfonic Acid Market review now and beyond
4,6-di(propan-2-yl)naphthalene-1-sulfonic acid | C16H20O3S - PubChem
Gentaur Molecular :Nacala \ 1 Amino 2 naphthol 4 sulfonic Acid \ 02212-12
1-deoxynojirimycin-1-sulfonic acid | Ligand page | IUPHAR/BPS Guide to PHARMACOLOGY
Sulfonated Melamine Formaldehyde - High Strength Admixture Manufacturer from Nagpur
In vitro and in silico antioxidant and antiproliferative activity of rhizospheric fungus Talaromyces purpureogenus isolate-...
The present study evaluated the potential biological activities of rhizospheric fungi isolated from the Achanakmar Biosphere Reserve, India. Fungus, Talaromyces purpureogenus isolate-ABRF2 from the soil of the Achanakmar biosphere was characterized by using morphological, biochemical and molecular techniques. Fungus was screened for the production of secondary metabolites using a specific medium. The metabolites were extracted using a suitable solvent and each fraction was subsequently evaluated for their antioxidant, antimicrobial, antiproliferative and anti-aging properties. The ethanolic extract depicted the highest antioxidant activity with 83%, 79%, 80% and 74% as assessed by ferric reducing power, 2,2-diphenyl 1-picrylhydrazyl, 2,2′-azino-bis3-ethylbenzthiazoline-6-sulfonic and phosphomolybdenum assays, respectively. Similarly, ethanolic extracts depicted marked antimicrobial activity as compared with standard antibiotics and antifungal agents as well as demonstrated significant
SDS quantitation and removal with resins
what is sds? sodium dodecyl benzene sulfonate. Just curious. Scott Coutts ,scott.coutts at med.monash.edu.au, wrote in message news:3F024A95.40702 at med.monash.edu.au... , Hi! , , Does anyone know of a way that I can assay for SDS concentration in a , sample containing protein? I want to know how much detergent remains , after attempts at removal. I need to assay for regular (non-labelled) , SDS, by the way. , , Also, Im thinking of removing the SDS from some protein samples using a , resin, perhaps Dowex 1-X2 or 1-X8 or similiar. Im thinking of doing it , in a batch method and then spinning the resin out through a frit. Does , anybody have any comments about this? I.e. are there better resins for , this type of application? Better ways of going about it? Is this likely , to be more efficient than acetone or TCA precipitation (I dont care , about protein function or recovery of secondary/tertiary structure). , , Lastly, does anyone have any experience with Pierces SDS-Out , ...
Daming Ruiheng Chemical Co., Ltd China
Diammonium Phosphates, Phosphoric Oxide Content Market Forecast 2025
2019 Global Forecast for Diammonium phosphates, phosphoric oxide content (2020-2025 Outlook)-Manufacturing & Markets Report. Equipment Type: Diammonium phosphates, phosphoric oxide content Industry: Fertilizer manufacturing Methodology Barnes Reports Global Manufacturing & Makets report series provide estimates of the size andcharacteristic
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... is unusual among biological molecules in being a sulfonic acid, while the vast majority of biologically occurring acids ... While taurine is sometimes called an amino acid, and indeed is an acid containing an amino group, it is not an amino acid in ... The low pKa of taurine's sulfonic acid group ensures this moiety is negatively charged in the pH ranges normally found in the ... 2000). "Sulfonic Acids, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. Wiley-VCH. doi:10.1002/14356007.a25_503. ...
Kosswig, Kurt (2000). "Sulfonic Acids, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. Wiley-VCH. doi:10.1002/ ... The reaction conversion is already in the first reactor at least 80%. Also disulfuric acid or chlorosulfuric acid can be used ... Hydrolysis affords ethionic acid: C2H4(SO3)2 + H2O → HOSO3C2H4SO3H Ethionic acid undergoes further hydrolysis to isethionic ... with a variety of applications are available by nucleophilic addition at the activated double bond of the vinyl sulfonic acid ...
Sulfonic, sulfinic and sulfenic acids, esters, amides, and related compounds. Sulfonic acids have functionality R−S(=O)2− ... Sulfonic acids like trifluoromethanesulfonic acid is a frequently used reagent in organic chemistry. Sulfinic acids have ... In the series sulfonic-sulfinic-sulfenic acids, both the acid strength and stability diminish in that order. ... Thiocarboxylic acids and thioamides. Thiocarboxylic acids (RC(O)SH) and dithiocarboxylic acids (RC(S)SH) are well known. ...
Sulfonic acids are used in many detergents. Compounds with carbon-sulfur multiple bonds are uncommon, an exception being carbon ... Sulfuric acid and SO3 combine to give oleum, a solution of pyrosulfuric acid (H2S2O7) in sulfuric acid. Thiosulfate salts (S ... and sulfurous acid (H2SO3). These acids are components of acid rain, lowering the pH of soil and freshwater bodies, sometimes ... Sulfuryl chloride and chlorosulfuric acid are derivatives of sulfuric acid; thionyl chloride (SOCl2) is a common reagent in ...
Reactions of aryl sulfonic acidsEdit. As a functional group, aryl sulfonic acids undergo desulfonation when heated in water: RC ... Aromatic sulfonation is an organic reaction in which a hydrogen atom on an arene is replaced by a sulfonic acid functional ... Aromatic sulfonic acids are intermediates in the preparation of dyes and many pharmaceuticals. Sulfonation of anilines lead to ... Aryl sulfonic acids are used as detergents, dye, and drugs. ... Synthesis of sulfanilic acid from aniline and sulfuric acid. ...
2-Hydroxy-4-Methoxybenzophenone-5-sulfonic acid, 3-Benzoyl-4-hydroxy-6-methoxybenzenesulfonic acid, Benzophenone-4, Escalol 577 ... Phenylbenzimidazole sulfonic acid Ensulizole, Eusolex 232, PBSA, Parsol HS 4% (US, AUS) 8% (EU) 3% (JP) EU, USA, AUS, JP ... Mexoryl SX, Terephthalylidene Dicamphor Sulfonic Acid 10% EU, AUS (US: approved in certain formulations up to 3% via New Drug ... p-Aminobenzoic acid PABA 15% (EU: banned from sale to consumers from 8 October 2009) USA, AUS Protects against skin tumors in ...
Since the sulfonic acid group (SO3H) is strongly acidic, this polymer neutralizes bases. In this way, various salts of the ... Polystyrene sulfonic acid has the idealized formula (CH2CHC6H4SO3H)n. The material is prepared by sulfonation of polystyrene: ( ... In its acid form, the resin is used as a solid acid catalyst in organic synthesis. François Dardel and Thomas V. Arden "Ion ... where condensation of two sulfonic acid groups yields a sulfonyl crosslink. On the other hand, the use of milder conditions ...
2-Cyclohexane dicarboxylic acid diisononyl ester (BASF trademark: Hexamoll DINCH). Alkyl sulphonic acid phenyl ester (ASE). ... Plasticizers used in PVC and other plastics are often based on esters of polycarboxylic acids with linear or branched aliphatic ... The sugars, chelating agents in lignosulfonates such as aldonic acids and extractive compounds are mainly responsible for set ...
NH2OH reacts with chlorosulfonic acid to give hydroxylamine-O-sulfonic acid, a useful reagent for the synthesis of caprolactam ... HOSO2Cl + NH2OH → NH2OSO2OH + HCl The hydroxylamine-O-sulfonic acid, which should be stored at 0 °C to prevent decomposition, ... preparation of hydroxylamine-O-sulfonic acid). Calorimetric studies of hydroxylamine decomposition Chemical company BASF info ... They can also act as antioxidants for fatty acids. In the synthesis of nylon 6, cyclohexanone (1) is first converted to its ...
Aryl sulfonic acids are used as detergents, dye, and drugs. Typical conditions involve heating the aromatic compound with ... Aromatic sulfonic acids are intermediates in the preparation of dyes and many pharmaceuticals. Sulfonation of anilines lead to ... Aromatic sulfonation is an organic reaction in which a hydrogen atom on an arene is replaced by a sulfonic acid functional ... As a functional group, an aryl sulfonic acid exhibits two distinctive reactions: Desulfonation when heated in water near 200 ºC ...
... and Mixed Phosphonic/Sulfonic Acids". Canadian Journal of Chemistry. 67: 1795. "Jean'ne M. Shreeve - Dept of Chemistry - ... Su, Debao; Cen, Wenbiao; Kirchmeier, Robert L.; Shreeve, Jean'ne M. (1989). "Synthesis of Fluorinated Phosphonic, Sulfonic, ... Phosphonic Acid". Journal of the American Chemical Society. 111: 1723. Guo, Cai-Yun; Kirchmeier, Robert L.; Shreeve, Jean'ne M ...
Synthesis of aromatic carboxylic acids from sulfonic acid and formates (1869). Nitroalkanes from alkyl iodides and silver ... Discovery of iodoso compounds in 1892 by reacting o-iodobenzoic acid with nitric acid. Observation (1892) that ortho- ... Discovery of nitrolic acids (with [Locher in 1874). Development of a method to distinguish primary, secondary, and tertiary ... substituted benzoic acid derivatives are esterified with difficulty. This principle is now known as the Victor Meyer ...
Perfluorinated carboxylic acids and sulfonic acids are produced in this way. Hydrogen fluoride is an important catalyst used in ... Unlike other hydrohalic acids, such as hydrochloric acid, hydrogen fluoride is only a weak acid in dilute aqueous solution. ... or nitric when using concentrated hydrofluoric acid solutions. Although hydrofluoric acid is regarded as a weak acid, it is ... Although Carl Wilhelm Scheele prepared hydrofluoric acid in large quantities in 1771, this acid was known in the glass industry ...
They are the conjugate bases of sulfonic acids with formula RSO2OH. As sulfonic acids tend to be strong acids, the ... A sulfonate is a salt or ester of a sulfonic acid. It contains the functional group R-SO3−. Anions with the general formula ... In the presence of water, they slowly hydrolyze to the hydroxy sulfonic acids. Sultone oximes are key intermediates in the ... Sulfonic esters are used as reagents in organic synthesis, chiefly because the RSO3− group is a good leaving group, especially ...
The resulting sulfonic acid is then neutralized with base to give sodium dodecylbenzenesulfonate, which is subsequently blended ... This sulfonation can be highly specific to place the sulfonic acid group across the ring, in the 4-position. ... The resulting alkylbenzene compounds are sulfonated to give the corresponding sulfonic acids. ... 2n with an excess of benzene in the presence of hydrogen fluoride or related acid catalysts. ...
Orthosteric agonists: GABA, gaboxadol, isoguvacine, muscimol, progabide, piperidine-4-sulfonic acid (partial agonist). ... Derry JM, Dunn SM, Davies M (March 2004). "Identification of a residue in the gamma-aminobutyric acid type A receptor alpha ... Its endogenous ligand is γ-aminobutyric acid (GABA), the major inhibitory neurotransmitter in the central nervous system. Upon ... Twyman RE, Rogers CJ, Macdonald RL (March 1989). "Differential regulation of gamma-aminobutyric acid receptor channels by ...
Tetrasodium tris(bathophenanthroline disulfonate)ruthenium(II)
SPECTRUM P Anisidine Sulfonic Acid,25g - 26WZ13|A1177-5G - Grainger
terephthalylidene dicamphor sulfonic acid - Ecamsule Summary Report | CureHunter
terephthalylidene dicamphor sulfonic acid: structure given in first source; abreviated as TDSA; FDA approved 2006 as component ... Acids: 3146*Noncarboxylic Acids*Sulfur Acids*Sulfonic Acids: 3*terephthalylidene dicamphor sulfonic acid: 2 ... terephthalylidene dicamphor sulfonic acid (Ecamsule). Subscribe to New Research on terephthalylidene dicamphor sulfonic acid ... Ecamsule; Mexoryl SX; 3,3-(1,4-phenylenedimethylidyne)bis(7,7-dimethyl-2-oxobicyclo(2.2.1)heptane-1-methanesulfonic acid); (( ...
Sulfonic Acid in Mumbai,Sulfonic Acid Manufacturers and Suppliers from india
Get contact details of Sulfonic Acid Manufacturers, Wholesale Sulfonic Acid Exporters, Best Sulfonic Acid Traders & ... Business Directory for Sulfonic Acid Suppliers in Mumbai - ... ortho sulphonic acid, Sulfonic Acid, nitro amino stilbene, ... Deals in 1 Hexanesulfonic Acid Sodium Salt Monohydrate, 1 Heptane Sulfonic Acid Sodium Salt Monhydrate, 1 Pentanesulfonic Acid ... ACID BLACK 210, Optical Brightening Agent, cold reactive dyes, Acid Violet Dyes, Meta Nitrobenzene Sulfonic Acid, Pigment Green ...
DIGITAL.CSIC: Combined Alkyl and Sulfonic Acid Functionalization of MCM-41-Type Silica: Part 2. Esterification of Glycerol with...
Mesoporous acid catalysts. Sulfonic acid. Fatty acids. Selective esterification. Monoglyceride. Fecha de publicación: 25-jul- ... and maximum activity per sulfonic acid group is achieved by tuning the methyl/sulfonic acid ratio. A monolaurin yield of 63% is ... Combined Alkyl and Sulfonic Acid Functionalization of MCM-41-Type Silica: Part 2. Esterification of Glycerol with Fatty Acids. ... and sulfonic acid groups as catalysts. It has been found that for each fatty acid the catalyst activity is affected by the ...
2,2'-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt(250-396-6) - Creative Enzymes
VINYL SULFONIC ACID 30% (Vinils lfonik asit)
6-DISULFONIC ACID, DISODIUM SALT POTASSIUM 1,2-NAPHTHOQUINONE-4-SULFONIC ACID 2-DIAZO-1-NAPHTHOL-4-SULFONIC ACID HYDRATE ACID ... 2-NAPHTHOQUINONE-4-SULFONIC ACID; 2-DIAZO-1-NAPHTHOL-4-SULFONIC ACID; HYDRATE ACID; FUCHSIN CALCIUM SALT; 8-((4,5-DIMETHOXY-2- ... vinyl sulfonic acid); poly(vinylsulfonic acid); polyethylene sulfonate; polyvinyl sulfonic potassium; polyvinylsulfonic acid; ... vinyl sulfonic acid); poly(vinylsulfonic acid); polyethylene sulfonate; polyvinyl sulfonic potassium; polyvinylsulfonic acid; ...
Revisiting of Boron Sulfonic Acid Applications in Organic Synthesis: Mini-Review
... plays an important role in the improvement of many organic reaction conditions as a solid acid catalyst, which dramatically has ... Boron sulfonic acid (BSA) plays an important role in the improvement of many organic reaction conditions as a solid acid ... 100] Safaei H. R. (2014). Boron sulfonic acid as a recyclable solid acid atalyst for the synthesis of 2h-indaxolo [1, 2-b] ... 31] Sedighinia, E., & Zahed Sargoli, M. (2012). Silica chloride and boron sulfonic acid as solid acid catalysts in preparation ...
ChemIDplus - 102415-55-4 - KRFAVSHDVRABPO-CIVUBGFFSA-N - Adenosine-5'-triphosphoro-gamma-1-(5-sulfonic acid)naphthyl...
2-Phenylbenzimidazole-5-sulfonic acid 27503-81-7 Chemical Properties Physical Properties
sulfonic acid | FactMonster
... sulfonic acids are considered strong acids (with dissociation constants of about 10−2). Because sulfonic acids are so acidic, ... sulfonic acid səlfŏn´ĭk [key], organic compound containing the functional group RSO2OH, which consists of a sulfur atom, S, ... Some sulfonic acid derivatives, e.g., the sulfa drugs, are important as antibiotics. The Columbia Electronic Encyclopedia, 6th ... Sulfonic acid groups also improve the washfastness of wool and silk dyes by enabling the dye to bind more tightly to the fabric ...
Sulfonic acids and their derivatives | SpringerLink
The pesticidal properties of a large number of different sulfonic acids, their salts, esters, amides, and other derivatives ... Sulfonic Acid Methanesulfonic Acid Sulfuryl Chloride Benzenesulfonyl Chloride Aromatic Sulfonic Acid These keywords were added ... The free sulfonic acids and their salts with metals and nitrogenous bases do not show contact insecticidal and acaricidal ... Melnikov N.N. (1971) Sulfonic acids and their derivatives. In: Gunther F.A., Gunther J.D. (eds) Chemistry of Pesticides. ...
Sulfonic acid | chemical compound | Britannica.com
The sulfonic acids are among the most important of the organosulfur compounds; the free acids are widely used as catalysts in ... Sulfonic acid, any of a class of organic acids containing sulfur and having the general formula RSO3H, in which R is an organic ... Alternative Title: sulphonic acid. Sulfonic acid, sulfonic also spelled sulphonic, any of a class of organic acids containing ... ethanesulfinic acid, and p. -toluenesulfonic acid. The sulfonic acids are very strong-comparable to hydrochloric acid and other ...
Benzenesulfonic acid, 2-amino-; o-Sulfanilic acid; Aniline-o-sulphonic acid; Aniline-2-sulfonic acid; Benzenesulfonic acid, o- ... 2-Aminobenzenesulfonic acid; o-Aminophenylsulfonic acid; Anilino-o-sulfonic acid; Anilino-2-sulfonic acid; Anilino-o-sulphonic ... Aniline-o-sulfonic acid. *Formula: C6H7NO3S ... Other names: o-Aminobenzenesulfonic acid; Orthanilic acid; ...
Sulfonic acid - Wikipedia
Representative Sulfonic Acids and Sulfonates. Taurine, a bile acid, and one of the few naturally occurring sulfonic acids ( ... The structure of sulfonic acids is illustrated by the prototype, methanesulfonic acid. The sulfonic acid group, RSO2OH features ... Thiols can be oxidized to sulfonic acids: RSH + 3⁄2 O2 → RSO3H Certain sulfonic acids, such as perfluorooctanesulfonic acid, ... 17 HF Sulfonic acids are much stronger acids than the corresponding carboxylic acids. p-Toluenesulfonic acid, with a pKa of − ...
HYDROXYETHYLPIPERAZINE ETHANE SULFONIC ACID || Skin Deep® Cosmetics Database | EWG
About HYDROXYETHYLPIPERAZINE ETHANE SULFONIC ACID: Hydroxyethylpiperazine Ethane Sulfonic Acid is a heterocyclic compound.. ... Synonym(s): 1-PIPERAZINEETHANESULFONIC ACID, 4- (2-HYDROXYETHYL) -; 1PIPERAZINEETHANESULFONIC ACID, 4 (2HYDROXYETHYL) ; 4- (2- ... HYDROXYETHYL) - 1-PIPERAZINEETHANESULFONIC ACID; 4- (2-HYDROXYETHYL) PIPERAZIN-1-YLETHANESULPHONIC ACID; 4- (2-HYDROXYETHYL) -1 ...
P-chlorobenzene sulfonic acid, acetylene hydrazide
Hydroxylamine-O-sulfonic acid - Wikipedia
Diimine can formed in situ from hydroxylamine-O-sulfonic acid respectively hydroxylamine-O-sulfonic acid hydroxylamine sulfate ... hydroxylamine-O-sulfonic acid reacts with ketones and aldehydes as a nucleophile to the corresponding oxime-O-sulfonic acids or ... The oxime-O-sulfonic acids of aldehydes react above room temperature upon elimination of sulfuric acid in high yields to ... S.L. Graham; T.H. Scholz (1986). "The reaction of sulfinic acid salts with hydroxylamine-O-sulfonic acid. A useful synthesis of ...
Global Dinonyl Naphthalene Sulfonic Acid Market 2017 Industry... - Worldmarketresearch
Global Dinonyl Naphthalene Sulfonic Acid Sales Market Report 2017 to its huge collection of research... ... 1 Dinonyl Naphthalene Sulfonic Acid Overview. 1.1 Product Overview and Scope of Dinonyl Naphthalene Sulfonic Acid. 1.2 ... 2.2 Global Dinonyl Naphthalene Sulfonic Acid (Volume and Value) by Type. 2.2.1 Global Dinonyl Naphthalene Sulfonic Acid Sales ... 2.3 Global Dinonyl Naphthalene Sulfonic Acid (Volume and Value) by Regions. 2.3.1 Global Dinonyl Naphthalene Sulfonic Acid ...
... definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Look it up ... Alizarin S is a sulphonic acid derivative of alizarin, and since it is much more soluble, it readily yields level colours. ... any of a large group of strong organic acids that contain the group -SO2OH and are used in the manufacture of dyes and drugs ...
Decane-1-Sulfonic Acid Sodium | Medline Industries, Inc.
SPECTRUM Amino 1 Naphthol Sulfonic Acid,500g - 26WJ35|A0370-25G - Grainger
N-(Iodoacetaminoethyl)-1-naphthylamine-5-sulfonic acid | Sigma-Aldrich
Synthesis and Characterization of Dodecylbenzene Sulfonic Acid doped Tetraaniline via Emulsion Polymerization
Sulfonic acids, petroleum, sodium salts - Registration Dossier - ECHA
Sulfonic acids, petroleum, calcium salts - Registration Dossier - ECHA
Sulfonic acids, petroleum, calcium salts - Registration Dossier - ECHA
Naphthalene sulfonic acid, reaction products... - Substance Information - ECHA
Losartan Reduces Trinitrobenzene Sulphonic Acid-Induced Colorectal Fibrosis in Rats
3-Amino-2,1-benzothiazole-5-sulfonic acid | C7H6N2O3S2 - PubChem
Reaction products of aniline-3-sulfonic acid... - Registration Dossier - ECHA
Use of nickel phthalocyanine sulphonic acid as redox indicator in cerimetry | SpringerLink
... using the indicator nickel phthalocyanine sulphonic acid are studied. The conditions and the... ... Use of nickel phthalocyanine sulphonic acid as redox indicator in cerimetry. Part II Titrimetric determination of ferrocyanide ... using the indicator nickel phthalocyanine sulphonic acid are studied. The conditions and the limits of reactions are determined ...
3-(diphenylphosphanyl)benzene-1-sulfonic acid | CAS No. 16704-71-5 | Sigma-Aldrich
Alfa Aesar 8-Ethoxyquinoline-5-sulfonic acid sodium salt hydrate, 97% | Fisher Scientific
Shop a large selection of Organic sulfonic acids and derivatives products and learn more about Alfa Aesar 8-Ethoxyquinoline-5- ... 8-ethoxyquinoline-5-sulfonic acid sodium salt hemihydroate,actinoquinol sodium salt,8-ethoxyquinoline-5-sulfonic acid sodium ... 8-ethoxyquinoline-5-sulfonic acid sodium salt hemihydroate,actinoquinol sodium salt,8-ethoxyquinoline-5-sulfonic acid sodium ... salt hydrate,8-ethoxy-5-quinolinesulfonic acid sodium salt monohydrate,acmc-2097kw,sodium 8-ethoxyquinoline-5-sulfonate ...
Para Toluene Sulfonic Acid - Manufacturers, Suppliers & Exporters in India
Para Toluene Sulfonic Acid suppliers, Para Toluene Sulfonic Acid exporters wholesalers, producers, traders in India. ... toluene sulfonic acid p toluene sulphonic acid 4-methyl benzene sulphonic acid 4-methyl benzene sulfonic acid 4-methyl-, 4- ... Para Toluene Sulfonic Acid We present to you carefully formulated Para Toluene Sulfonic Acid . The Para Toluene Sulfonic Acid ... Para Toluene Sulfonic Acid We are offering tosic acid monohydrate methyl benzene sulphonic acid monohydrate toluene sulphonic ...
Metal alloy sulfonic acid electroplating baths - Patent # 6183619 - PatentGenius
... ammonium salts of alkyl and alkanol sulfonic acids as additives in pure metal and metal alloy sulfonic acid electroplating ... type of bath with the more economical salts of alkyl and alkanol sulfonic acids. The metals and metal alloys include but are ... wherein the sulfonic acid is an alkyl sulfonic acid.. 3. The method of claim 2, wherein the alkyl sulfonic acid is methane ... an effective amount of a salt of an alkanol sulfonic acid or of a mixture of analkyl sulfonic acid and an alkanol sulfonic acid ...
1,2-Naphthoquinone-4-sulfonic Acid Potassium Salt (Tech.), 90%, ACROS Organics | Fisher Scientific
2-Naphthoquinone-4-sulfonic Acid Potassium Salt (Tech.), 90%, ACROS Organics 5g Chemicals:Organic Compounds:Benzenoids: ... 2-naphthoquinone-4-sulfonic acid potassium salt,beta-naphthoquinone-4-sulfonic acid potassium salt,beta-naphthoquinone-4- ... 2-naphthoquinone-4-sulfonic acid potassium salt,beta-naphthoquinone-4-sulfonic acid potassium salt,beta-naphthoquinone-4- ... 1,2-Naphthoquinone-4-sulfonic Acid Potassium Salt (Tech.), 90%, ACROS Organics™ ...
CatalystsSulfonateSilicaMethylAlkaneGroupAromaticLinear alkyl benzene sulfonic acidDerivativesMethanesulfonicAlkyl sulfETHANE SULFONIC ACIDToluene Sulfonic AcidTrinitrobenzene sulfonic acidPerfluorooctane sulfonic acidSulfonylChlorideDyesSynonymsAqueousTNBSSulfonationCatalystAryl sulfonicEstersLABSAChemicalsEthylSuppliersAliphaticFatty acidsPhenylNaphthaleneCompoundsSolubleReaction2018PFOSStrong acidsStronger acidsAciditySulfa drugsClass of organicAldehydesOrganicProtonBenzenesulfonicCarboxylic acidHydrogen
- It is the process of replacing hydrogen atom by a sulphonic acid group, SO3H. (assignmenthelp.net)
- The order of ease of replacement of H- atoms in tertiary impounds is very much easier than secondary and in secondary compounds replacement of H-atoms by sulphonic acid group is easier than primary. (assignmenthelp.net)
- Aromatic sulfonic acids are particularly useful as intermediates or starting materials in synthesis-for example, in the preparation of phenols . (britannica.com)
- Aromatic sulfonic acids are obtained generally by treating aromatic compounds with concentrated sulfuric acid and added sulfur trioxide ("oleum"), the process being called sulfonation . (britannica.com)
- A particularly large scale application of this method is the production of alkylbenzenesulfonic acids: RC6H5 + SO3 → RC6H4SO3H In this reaction, sulfur trioxide is an electrophile and the arene undergoes electrophilic aromatic substitution. (wikipedia.org)
- Although both alkyl and aryl sulfonic acids are known, most of the applications are associated with the aromatic derivatives. (wikipedia.org)
- with(B) aromatic isocyanato sulfonic acids, wherein the equivalent ratio of the total quantity of isocyanate groups (including any isocyanate groups present in dimerized form) to sulfonic acid groups is from 0.5:1 to 50:1 and the equivalent ratio of the sum of hydroxyl groups in (A) to NCO groups is from 1.5:1 to 30:1. (patentgenius.com)
- The instant invention is directed to a process wherein polyhydroxyl compounds are reacted with sub-equivalent molar quantities of aromatic isocyanatosulfonic acids, optionally in admixture with conventional polyisocyanates. (patentgenius.com)
- Linear alkyl benzene sulfonic acid are complex mixtures of homologues of different alkyl chain lengths (C10 to C13 or C14) and phenyl positional isomers of 2 to 5-phenyl in proportions dictated by the starting materials and reaction conditions, each containing an aromatic ring sulfonated at the para position and attached to a linear alkyl chain at any position with the exception of terminal one (1-phenyl). (medgadget.com)
- Two different heterogeneous catalysts carrying aryl-sulfonic moieties, in which the aromatic ring was either fluorinated or not, were successfully synthesized. (rsc.org)
- A straightforward and efficient method for the synthesis of pyrano[2,3-d]pyrimidine diones derivatives from the reaction of barbituric acid, malononitrile and various aromatic aldehydes using SBA-Pr-SO3H as a nanocatalyst is reported. (7thspace.com)
- Convenient and simple, sequential diazotization-iodination of aromatic amines with NaNO 2 /KI in the presence of a sulfonic acid based cation-exchange resin in water is an inexpensive, noncorrosive and eco-friendly synthetic route, that allows the preparation of various electron-rich and deficient iodoarenes in good yields. (organic-chemistry.org)
Linear alkyl benzene sulfonic acid2
- Labsa 96% linear alkyl benzene sulfonic acid. (alibaba.com)
- Linear alkyl benzene sulfonic acid, alias: dodecyl benzene sulfonic acid, molecular formula C18H30O3S, molecular weight 326.49, brown viscous liquid, organic weak acid;It is corrosive to a certain extent, strongly irritating to skin and eyes, soluble in water and diluted with water to generate heat;Insoluble in general organic solvents, mainly used as detergent raw materials. (alibaba.com)
- The literature on saturated amino sulfonic acids with primary/secondary amino group and their derivatives from XIX century to 2016 is surveyed, focusing mainly on results published in the last two decades. (enamine.net)
- Synthesis of saturated amino sulfonic acids and their derivatives, their occurrence among natural products, as well as their use for design of peptidomimetics, conjugates with various molecules of practical significance, applications as building blocks for drug discovery and for other reasons are discussed. (enamine.net)
- Similarly, methanesulfonic acid, pKa = −1.9, is also about one million times stronger acid than acetic acid. (wikipedia.org)
- The structure of sulfonic acids is illustrated by the prototype, methanesulfonic acid. (wikipedia.org)
- The simplest examples are methanesulfonic acid, CH3SO2OH and p-toluenesulfonic acid, which are regularly used in organic chemistry as acids that are lipophilic (soluble in organic solvents). (wikipedia.org)
- Methanesulfonic acid is used as the supporting electrolyte of the zinc-cerium and lead-acid (methanesulfonate) flow batteries. (wikipedia.org)
- 9. A method of increasing the useful upper current density range of a tin/lead methane/methanol sulfonate plating bath and thereby allowing plating at higher speeds, said method comprising the step of replacing at least a portion of the methanesulfonic acid with sodium isethionate. (patentgenius.com)
ETHANE SULFONIC ACID2
Toluene Sulfonic Acid7
- We offer optimal quality Para Toluene Sulfonic Acid which is made up of best quality chemicals. (exportersindia.com)
- The Para Toluene Sulfonic Acid we supply and export is made from extremely pure substances. (exportersindia.com)
- Thus, our Para Toluene Sulfonic Acid is well known for high efficacy. (exportersindia.com)
- The Para Toluene Sulfonic Acid we offer is available at market leading prices. (exportersindia.com)
- We are Manufacturers and Exporters of Para Toluene Sulfonic Acid. (exportersindia.com)
- we are a renowned Supplier of Para Toluene Sulfonic Acid. (exportersindia.com)
- Para Toluene sulfonic acid (PTSA or pTsOH) or tosylic acid (TsOH) is an organic compound with the formula CH3C6H4SO3H. (exportersindia.com)
Trinitrobenzene sulfonic acid2
- The present study aimed to investigate the protective effects of magnolol on acute 2,4,6-trinitrobenzene sulfonic acid (TNBS)‑induced colitis, and its underlying mechanisms. (spandidos-publications.com)
- A rectal enema of trinitrobenzene sulfonic acid (TNBS) (100 mg/kg) was applied to BALB/c mice. (aspetjournals.org)
Perfluorooctane sulfonic acid2
- Perfluorooctane sulfonic acid (PFOS) and 3,3′,4,4′,5-pentachlorobiphenyl (PCB126) are persistent organic pollutants of high concern because of their environmental persistence, bioaccumulation and toxic properties. (diva-portal.org)
- Exposure modeling results in paper I and II demonstrate that dietary intake is the major exposure pathway of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS), while known precursors account for only a few percent of the total exposure. (diva-portal.org)
- A sulfonic acid (or sulphonic acid) refers to a member of the class of organosulfur compounds with the general formula R−S(=O)2−OH, where R is an organic alkyl or aryl group and the S(=O)2−OH group a sulfonyl hydroxide. (wikipedia.org)
- Most "washable" dyes are sulfonic acids (or have the functional sulfonyl group in them) for this reason. (wikipedia.org)
- Triflic acid is manufactured by electrochemical fluorination of methanesulfonyl chloride or fluoride. (britannica.com)
- They are produced by chlorination of sulfonic acids using thionyl chloride and related reagents. (wikipedia.org)
- The chemiluminescence of the system luminol/cobalt(II) chloride is dramatically enhanced by the addition of hydroxylamine-O-sulfonic acid. (wikipedia.org)
- For this purpose, chloride based (pH ~5) and methane sulfonic acid (MSA, pH ~0.5) electrolytes, including ABN, were prepared. (mdpi.com)
- Zajkoska SP, Mulone A, Hansal WEG, Klement U, Mann R, Kautek W. Alkoxylated β-Naphthol as an Additive for Tin Plating from Chloride and Methane Sulfonic Acid Electrolytes. (mdpi.com)
- Arkema's sulfonyls range includes MSA (methane sulfonic acid - CAS 75-75-2) and MSC (methane sulfonic chloride - CAS 124-63-0) with various grades adapted to customer's applications. (arkema.com)
- Common aqueous acids include hydrochloric acid (a solution of hydrogen chloride which is found in gastric acid in the stomach and activates digestive enzymes ), acetic acid (vinegar is a dilute aqueous solution of this liquid), sulfuric acid (used in car batteries ), and citric acid (found in citrus fruits). (wikipedia.org)
- However, hydrogen chloride, acetic acid, and most other Brønsted-Lowry acids cannot form a covalent bond with an electron pair and are therefore not Lewis acids. (wikipedia.org)
- Sulfonic acid groups are often introduced into organic molecules such as dyes to stabilize them for use in aqueous dye baths. (factmonster.com)
- Sulfonic acid groups also improve the washfastness of wool and silk dyes by enabling the dye to bind more tightly to the fabric. (factmonster.com)
- p-Cresidinesulfonic acid is used to make food dyes. (wikipedia.org)
- 4-Amino-3-hydroxy-1-naphthalenesulfonic acid is used as mordant dyes and acid dyes intermediate. (alfa.com)
- Molecular Weight 303 Empirical Formula C7H11NO7S Synonyms 2 Naphthylamine 1-5 Disulfonic Acid Form Supplied Wet Powder Basis For Sale On Real Contant (M.W. 303) Strength Min. (exportersindia.com)
- ACID SODIUM SALT Synonyms: SODIUM DL- 10 -CAMPHORSULFONATE;SODIUM CAMPHORSULPHONATE;7,7-dimethyl-2-oxo-,sodiumsalt,(±)-Biscyclo[2.2.1. (bushorchimp.com)
- N-(Iodoacetylaminoethyl)-8-Naphthylamine-1-Sulfonic Acid is a fluorescent sulfhydryl reagent that is sensitive to photo catalyzed degradation in aqueous solution and organic solvents. (scbt.com)
- Is selective heating of the sulfonic acid catalyst AC-SO3H by microwave radiation crucial in the acid hydrolysis of cellulose to glucose in aqueous media? (nii.ac.jp)
- The chemically modified guar gum sulphonic acid (GSA) resin was used for removal and pre-concentration of Zn 2+ , Cd 2+ , Fe 2+ , Pb 2+ and Cu 2+ ions in aqueous solutions and steel industry effluent from Jodhpur, India. (scielo.org.za)
- Triflic acid, H[OTf], a well-known superacid in aqueous media, has been shown to be a weak acid with a pKa of 2.0 in this ionic liquid. (monash.edu)
- In the special case of aqueous solutions, proton donors form the hydronium ion H 3 O + and are known as Arrhenius acids . (wikipedia.org)
- Aqueous Arrhenius acids have characteristic properties which provide a practical description of an acid. (wikipedia.org)
- An aqueous solution of an acid has a pH less than 7 and is colloquially also referred to as 'acid' (as in 'dissolved in acid'), while the strict definition refers only to the solute . (wikipedia.org)
- Most acids encountered in everyday life are aqueous solutions , or can be dissolved in water, so the Arrhenius and Brønsted-Lowry definitions are the most relevant. (wikipedia.org)
- The therapeutic potency of rAS3 was evaluated in the 2,4,6-trinitrobenzene sulphonic acid (TNBS) induced colitis model of the rat. (bmj.com)
- METHODS Colitis was induced by an intrarectal instillation of trinitrobenzene sulphonic acid (TNBS, 60 mg/ml, 30% ethanol), in wild type (control) or iNOS deficient mice. (bmj.com)
- In this study, we induced a chronic experimental colitis, in both wild type and iNOS deficient mice, by using the hap- ten 2,4,6-trinitrobenzene sulphonic acid (TNBS). (bmj.com)
- A sulfonic acid is produced by the process of sulfonation. (wikipedia.org)
- Hydroxylamine-O-sulfonic acid ("HOSA") is the inorganic compound with molecular formula H3NO4S that is formed by the sulfonation of hydroxylamine with oleum. (wikipedia.org)
- The sulfonation of hydroxylamine can also be effected with chlorosulfonic acid by a method first published in 1925 and refined for Organic Syntheses. (wikipedia.org)
- sulfonic acid groups were introduced by mild post-sulfonation exclusively on the para-position of the pendant phenyl ring in PHQ. (unt.edu)
- Triflic acid, one of the strongest known organic acids, is used as a polymerization catalyst and in fuel cells , in gasoline production, and in the synthesis of organic and organometallic compounds . (britannica.com)
- It is most useful as acid-catalyst reaction such as esterification condensation acetylation polymerization alkylation's hydrolysis dehydration. (exportersindia.com)
- Different biomaterials have been chosen, with a view to select the most active solid acid catalyst . (rsc.org)
- Reduction of the average pore size (determined by N2 adsorption) from 14 to below 10 Å has a detrimental influence on the catalyst activity for both acids. (csic.es)
- Kiani Moghadam, Faeze 2016-03-28 00:00:00 This paper reports an efficient heterogeneous catalyst based on sulfonic acid functionalization of magnetic nanoparticles. (deepdyve.com)
- This paper reports an efficient heterogeneous catalyst based on sulfonic acid functionalization of magnetic nanoparticles. (deepdyve.com)
- The instant invention is directed to compounds having an average molecular weight of from 300 to 12,000, containing: at least one hydroxyl group and at least one urethano-aryl-sulfonic acid group and a method for their preparation. (patentgenius.com)
- The process is characterized as a process for the preparation of compounds having a number average molecular weight of from 300 to 12,000 having at least one hydroxyl group and at least one urethano-aryl-sulfonic acid group, comprising: reacting at from 0.degree. (patentgenius.com)
- Preliminary results indicated superior performances for the fluoro-aryl-sulfonic acid, compared to the non-fluorinated sample. (rsc.org)
- 1-Amino 2-Naphthol 4-Sulphonic Acid,Laboratory Chemicals. (maharashtradirectory.com)
- Besides, the amphiphilic properties of fluorinated compounds such as PFOS and perfluorohexanoic acid (PFHxA) suggest a role in increasing cell membrane permeability and solubilizing chemicals. (diva-portal.org)
- Chemicals or substances having the property of an acid are said to be acidic . (wikipedia.org)
- 4. The method of claim 1, wherein the salt is a salt of 2-hydroxy ethyl sulfonic acid. (patentgenius.com)
- 15. The electroplating bath of claim 14, wherein the sulfonic acid salt is a salt of 2-hydroxy ethyl sulfonic acid. (patentgenius.com)
- soluble in water,slightly soluble in acetic acid , ethyl acetate.Has strong odor. (bushorchimp.com)
- In this study, the thermodynamics, kinetics and mechanisms of the proton reduction (hydrogen evolution) reaction at a platinum electrode have been investigated in the room temperature ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, using a range of oxyacids (phenols, carboxylic acids, or sulfonic acids) as the proton source. (monash.edu)
- We are also one of the recommended P-Toulene Sulfonic Acid Exporters and suppliers in India. (exportersindia.com)
- morpholinopropane sulfonic acid manufacturers and suppliers with contacts and product range are mentioned in the study. (marketpublishers.com)
- All Verified lignin sulfonic acid suppliers & lignin sulfonic acid manufacturers have passed our Business License Check, they can provide quality lignin sulfonic acid products. (ecer.com)
- Global Dinonyl Naphthalene Sulfonic Acid Market 2017 Industry. (mynewsdesk.com)
- Qyresearchreports include new market research report "Global Dinonyl Naphthalene Sulfonic Acid Sales Market Report 2017" to its huge collection of research reports. (mynewsdesk.com)
- A new research study presents a comprehensive analysis and understanding of the global Dinonyl Naphthalene Sulfonic Acid market . (mynewsdesk.com)
- The research report also offers an-depth analysis of the global Dinonyl Naphthalene Sulfonic Acid market, focusing on the product portfolio, primary applications, latest developments, regional segmentation, and the competitive scenario of the overall market. (mynewsdesk.com)
- This is expected to help the readers and players in gaining a strong understanding of the Dinonyl Naphthalene Sulfonic Acid market across the globe. (mynewsdesk.com)
- The research study addresses important questions related to the development in the global Dinonyl Naphthalene Sulfonic Acid market. (mynewsdesk.com)
- What are the vital factors augmenting the global Dinonyl Naphthalene Sulfonic Acid market? (mynewsdesk.com)
- Which primary factors are projected to restrict the development of the global Dinonyl Naphthalene Sulfonic Acid market? (mynewsdesk.com)
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- The strategies and tactics that are used by the key players have been highlighted in order to guide the new players of the global Dinonyl Naphthalene Sulfonic Acid market. (mynewsdesk.com)
- Naphthalene sulfonic acid, reaction products. (europa.eu)
- The global market size of 2-Naphthalene Sulfonic Acid is $XX million in 2017 with XX CAGR from 2013 to 2017, and it is expected to reach $XX million by the end of 2023 with a CAGR of XX% from 2018 to 2023. (marketpublishers.com)
- For competitor segment, the report includes global key players of 2-Naphthalene Sulfonic Acid as well as some small players. (marketpublishers.com)
- Sulfonic acid groups can greatly enhance the water solubility of compounds , as seen with the sulfonic acid derivative of triphenyl phosphine (TPPTS), P(C 6 H 4 -m-SO 3 Na) 3 . (britannica.com)
- Electron deficient heterocycles, such as tetrazole, can be N-aminated with hydroxylamine-O-sulfonic acid, while even more electron-deficient compounds, such as 5-nitrotetrazole, react only with stronger aminating agents such as O-tosylhydroxylamine or O- mesitylene sulfonylhydroxylamine to amino compounds, which were investigated as explosives. (wikipedia.org)
- Also sulfur compounds (such as thioethers) can be aminated with hydroxylamine-O-sulfonic acid to sulfinimines (isosteric with sulfoxides but far more unstable) or phosphorus compounds (such as triphenylphosphine) can be aminated to phosphinimines via the intermediate aminotriphenylphosphonium hydrogen sulfate. (wikipedia.org)
- and (B) hydroxyl compounds having an average molecular weight of 300 to 12,000 and containing a urethanoaryl-sulfonic acid group, said hydroxyl compounds being prepared by reacting at from 0.degree. (patentgenius.com)
- The sulfonic and oxanilic metabolites were present in almost 75% of the groundwater samples and were generally present from 3 to 45 times more frequently than their parent compounds. (usgs.gov)
- PTSA is comparable in strength to mineral acids such as Sulphuric acid, but are especially suitable for organic reactions where an inorganic, mineral acid could cause charring, oxidation, or an unwanted chemical reaction. (exportersindia.com)
- Mohammadi, Ali A. Reaction of 4-amino-3-hydroxy-1-naphthalenesulfonic acid with orthoesters: a new facile one-pot synthesis of 2-substituted naphth[1,2-d]oxazole-5-sulfonates. (alfa.com)
- Morpholinopropane sulfonic acid (CAS 1132-61-2) Market Research Report 2018 contents were worked out and placed on the website in January, 2018. (marketpublishers.com)
- Please note that Morpholinopropane sulfonic acid (CAS 1132-61-2) Market Research Report 2018 is a half ready publication and contents are subject to change. (marketpublishers.com)
- Global Linear Alkyl Benzene Sulphonic Acid Market Report 2018 aims to fulfill the needs of the clients looking for a fresh outlook towards the Global Linear Alkyl Benzene Sulphonic Acid Market, or fill in the knowledge gaps with the data available in the report. (medgadget.com)
- The global Linear Alkyl Benzene Sulphonic Acid market is valued at 3360 million US$ in 2017 and will reach 4420 million US$ by the end of 2025, growing at a CAGR of 3.5% during 2018-2025. (reportsnreports.com)
- The report then estimates 2018-2023 market development trends of 2-Amino Toluene-5-Sulfonic Acid industry. (researchmoz.us)
- Although statistically significant temporal trends in the average dietary intake estimates could not be determined, there is preliminary evidence of a downward time trend in the concentrations of PFOS in eggs and meat products and an upward trend of PFDA, PFUnDA, perfluorododecanoic acid and perfluorotridecanoic acid in fish products, which both warrant further investigation. (diva-portal.org)
- However, while carboxylic acids are weak (with dissociation constants of about 10 −5 ), sulfonic acids are considered strong acids (with dissociation constants of about 10 −2 ). (factmonster.com)
- Strong acids and some concentrated weak acids are corrosive , but there are exceptions such as carboranes and boric acid . (wikipedia.org)
- Finally, the pKa values of 10 weak oxyacids, covering 16 orders of magnitude in acid strength (2.0 ≥ pKa ≥ 17.8), have been calculated using a voltammetric method and compared with data from conventional solvents (acetonitrile and water) in order to gain insights into how the nature of the solvent (i.e., dielectric properties, Lewis acidity/basicity, hydrogen donating/accepting ability, etc.) influences equilibrium acidity. (monash.edu)
Class of organic1
- The parent compound (with the organic substituent replaced by hydrogen) is the hypothetical compound sulfurous acid. (wikipedia.org)
- Perfluoroalkyl carboxylic acids (PFCAs) and perfluoroalkane sulfonic acids (PFSAs) are persistent organic contaminants which have been globally measured in human serum samples at low μg L -1 concentrations. (diva-portal.org)
- At 80 °C and 100% relative humidity, a 20%-30% enhancement of proton conductivity was only observed when sulfonic acid modified particle less than 50 nm in diameter were used. (mdpi.com)
- Hydrogen evolution from H[OTf] has been simulated using a CE mechanism, where acid dissociation is followed by proton reduction via the classical Volmer-Tafel route. (monash.edu)
- Proton reduction from a range of other sulfonic or carboxylic acids has been shown to occur in two steps (electron stoichiometry = 1:1), which has been attributed to the formation of a stable intermediate species through homo hydrogen bonding (homoassociation) between the acid and its conjugate anion base. (monash.edu)
- An acid is a molecule or ion capable of donating a hydron (proton or hydrogen ion H + ), or, alternatively, capable of forming a covalent bond with an electron pair (a Lewis acid). (wikipedia.org)
- The first category of acids is the proton donors or Brønsted acids . (wikipedia.org)
- unless otherwise specified, acid-base reactions are assumed to involve the transfer of a proton (H + ) from an acid to a base. (wikipedia.org)