Sulfonic acid derivatives that are substituted with an aliphatic hydrocarbon group.
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.
Organic esters or salts of sulfonic acid derivatives containing an aliphatic hydrocarbon radical.
A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
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.
Parliamentary democracy located between France on the northeast and Portugual on the west and bordered by the Atlantic Ocean and the Mediterranean Sea.
The generic name for the group of aliphatic hydrocarbons Cn-H2n+2. They are denoted by the suffix -ane. (Grant & Hackh's Chemical Dictionary, 5th ed)
A loose confederation of computer communication networks around the world. The networks that make up the Internet are connected through several backbone networks. The Internet grew out of the US Government ARPAnet project and was designed to facilitate information exchange.
Exclusive legal rights or privileges applied to inventions, plants, etc.
Inorganic or organic oxy acids of sulfur which contain the RSO2(OH) radical.
A reagent that is used to neutralize peptide terminal amino groups.
Property of membranes and other structures to permit passage of light, heat, gases, liquids, metabolites, and mineral ions.
Software used to locate data or information stored in machine-readable form locally or at a distance such as an INTERNET site.
Inorganic compounds that contain fluorine as an integral part of the molecule.
Substances or energies, for example heat or light, which when introduced into the air, water, or land threaten life or health of individuals or ECOSYSTEMS.
Polymers of ETHYLENE OXIDE and water, and their ethers. They vary in consistency from liquid to solid depending on the molecular weight indicated by a number following the name. They are used as SURFACTANTS, dispersing agents, solvents, ointment and suppository bases, vehicles, and tablet excipients. Some specific groups are NONOXYNOLS, OCTOXYNOLS, and POLOXAMERS.
A plant genus of the family ERICACEAE known for species with edible fruits.
The study of the origin, structure, development, growth, function, genetics, and reproduction of plants.
Chemistry dealing with the composition and preparation of agents having PHARMACOLOGIC ACTIONS or diagnostic use.
Expendable and nonexpendable equipment, supplies, apparatus, and instruments that are used in diagnostic, surgical, therapeutic, scientific, and experimental procedures.
The confinement of a patient in a hospital.
Therapy for the insufficient cleansing of the BLOOD by the kidneys based on dialysis and including hemodialysis, PERITONEAL DIALYSIS, and HEMODIAFILTRATION.
The end-stage of CHRONIC RENAL INSUFFICIENCY. It is characterized by the severe irreversible kidney damage (as measured by the level of PROTEINURIA) and the reduction in GLOMERULAR FILTRATION RATE to less than 15 ml per min (Kidney Foundation: Kidney Disease Outcome Quality Initiative, 2002). These patients generally require HEMODIALYSIS or KIDNEY TRANSPLANTATION.
An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which, on the basis of epidemiologic evidence, is known to be associated with a health-related condition considered important to prevent.
Solutions prepared for hemodialysis. The composition of the pre-dialysis solution may be varied in order to determine the effect of solvated metabolites on anoxia, malnutrition, acid-base balance, etc. Of principal interest are the effect of the choice of buffers (e.g., acetate or carbonate), the addition of cations (Na+, K+, Ca2+), and addition of carbohydrates (glucose).
The study of chance processes or the relative frequency characterizing a chance process.
The science, art, or technology dealing with processes involved in the separation of metals from their ores, the technique of making or compounding the alloys, the techniques of working or heat-treating metals, and the mining of metals. It includes industrial metallurgy as well as metallurgical techniques employed in the preparation and working of metals used in dentistry, with special reference to orthodontic and prosthodontic appliances. (From Jablonski, Dictionary of Dentistry, 1992, p494)
Electropositive chemical elements characterized by ductility, malleability, luster, and conductance of heat and electricity. They can replace the hydrogen of an acid and form bases with hydroxyl radicals. (Grant & Hackh's Chemical Dictionary, 5th ed)
The amount that a health care institution or organization pays for its drugs. It is one component of the final price that is charged to the consumer (FEES, PHARMACEUTICAL or PRESCRIPTION FEES).
The edible portions of any animal used for food including domestic mammals (the major ones being cattle, swine, and sheep) along with poultry, fish, shellfish, and game.
Exploitation through misrepresentation of the facts or concealment of the purposes of the exploiter.
Concept referring to the standardized fees for services rendered by health care providers, e.g., laboratories and physicians, and reimbursement for those services under Medicare Part B. It includes acceptance by the physician.
The interchange of goods or commodities, especially on a large scale, between different countries or between populations within the same country. It includes trade (the buying, selling, or exchanging of commodities, whether wholesale or retail) and business (the purchase and sale of goods to make a profit). (From Random House Unabridged Dictionary, 2d ed, p411, p2005 & p283)
Organic compounds containing the carboxy group (-COOH). This group of compounds includes amino acids and fatty acids. Carboxylic acids can be saturated, unsaturated, or aromatic.
A gonadal stimulant and inducer of ovulation. It is used in the treatment of infertility and amenorrhea, but is thought to be less effective than CLOMIPHENE.
An independent Federal agency established in 1958. It conducts research for the solution of problems of flight within and outside the Earth's atmosphere and develops, constructs, tests, and operates aeronautical and space vehicles. (From U.S. Government Manual, 1993)
A novel composition, device, or process, independently conceived de novo or derived from a pre-existing model.
Property, such as patents, trademarks, and copyright, that results from creative effort. The Patent and Copyright Clause (Art. 1, Sec. 8, cl. 8) of the United States Constitution provides for promoting the progress of science and useful arts by securing for limited times to authors and inventors, the exclusive right to their respective writings and discoveries. (From Black's Law Dictionary, 5th ed, p1014)
Toxic chlorinated unsaturated hydrocarbons. Include both the 1,1- and 1,2-dichloro isomers. Both isomers are toxic, but 1,1-dichloroethylene is the more potent CNS depressant and hepatotoxin. It is used in the manufacture of thermoplastic polymers.
Hydrocarbon compounds with one or more of the hydrogens replaced by CHLORINE.
A gas that has been used as an aerosol propellant and is the starting material for polyvinyl resins. Toxicity studies have shown various adverse effects, particularly the occurrence of liver neoplasms.
Chemical compounds applied to materials to reduce their retention of an electrostatic charge.
A milky, product excreted from the latex canals of a variety of plant species that contain cauotchouc. Latex is composed of 25-35% caoutchouc, 60-75% water, 2% protein, 2% resin, 1.5% sugar & 1% ash. RUBBER is made by the removal of water from latex.(From Concise Encyclopedia Biochemistry and Molecular Biology, 3rd ed). Hevein proteins are responsible for LATEX HYPERSENSITIVITY. Latexes are used as inert vehicles to carry antibodies or antigens in LATEX FIXATION TESTS.
A family of fused-ring hydrocarbons isolated from coal tar that act as intermediates in various chemical reactions and are used in the production of coumarone-indene resins.

A comparative study of the unfolding of the endoglucanase Cel45 from Humicola insolens in denaturant and surfactant. (1/199)

Cellulases are increasingly being used for industrial purposes, particularly in washing powders, yet little is known of the factors governing the stability of proteins in detergent solutions. We present a comparative analysis of the behavior of the cellulase Cel45 from Humicola insolens in the presence of the denaturant guanidinium chloride and the anionic detergent C12-LAS. Although Cel45 unfolds in GdmCl according to a simple two-state model under equilibrium conditions, it accumulates a transient intermediate during refolding. The four disulfide bonds do not contribute detectably to the stability of the native state. Cel45 is unfolded by very low concentrations of C12-LAS (1-4 mM). An analysis of 16 mutants of Cel45 shows a very weak correlation between unfolding rates in denaturant and detergent; mutants that have the same unfolding rate in GdmCl (within a factor of 1.5) vary 1,000-fold in their unfolding rates in C12-LAS. The data support a simple model for unfolding by detergent, in which the introduction of positive charges or removal of negative charges greatly increases detergent sensitivity, while interactions with the hydrophobic detergent tail contribute to a smaller extent. This implies that different detergent-mediated unfolding pathways exist, whose accessibilities depend on individual residues. Double-mutant cycles reveal that mutations in two proximal residues lead to repulsion and a destabilization greater than the sum of the individual mutations as measured by GdmCl denaturation, but they also reduce the affinity for LAS and therefore actually stabilize the protein relative to wild-type. Ligands that interact strongly with the denatured state may therefore alter the unfolding process.  (+info)

Effects of carnosine and related compounds on the stability and morphology of erythrocytes from alcoholics. (2/199)

The effects of carnosine and related compounds on erythrocytes from alcoholics were studied. In their presence, erythrocytes showed an increased ability to resist haemolysis and showed a more normal morphology, with carnosine and N-acetyl-carnosine being the most effective compounds. These beneficial properties of the dipeptides do not appear to be directly related to their antioxidant or buffering properties.  (+info)

Mechanism for proton conduction of the M(2) ion channel of influenza A virus. (3/199)

The M(2) integral membrane protein of influenza A virus forms a proton-selective ion channel. We investigated the mechanism for proton transport of the M(2) protein in Xenopus oocytes using a two-electrode voltage clamp and in CV-1 cells using the whole cell patch clamp technique. Membrane currents were recorded while manipulating the external solution to alter either the total or free proton concentration or the solvent itself. Membrane conductance decreased by approximately 50% when D(2)O replaced H(2)O as the solvent. From this, we conclude that hydrogen ions do not pass through M(2) as hydronium ions, but instead must interact with titratable groups that line the pore of the channel. M(2) currents measured in solutions of low buffer concentration (<15 mM in oocytes and <0.15 mM in CV-1 cells) were smaller than those studied in solutions of high buffer concentration. Furthermore, the reversal voltage measured in low buffer was shifted to a more negative voltage than in high buffer. Also, at a given pH, M(2) current amplitude in 15 mM buffer decreased when pH-pK(a) was increased by changing the buffer pK(a). Collectively, these results demonstrate that M(2) currents can be limited by external buffer capacity. The data presented in this study were also used to estimate the maximum single channel current of the M(2) ion channel, which was calculated to be on the order of 1-10 fA.  (+info)

In vivo transposon mutagenesis of the methanogenic archaeon Methanosarcina acetivorans C2A using a modified version of the insect mariner-family transposable element Himar1. (4/199)

We present here a method for in vivo transposon mutagenesis of a methanogenic archaeon, Methanosarcina acetivorans C2A, which because of its independence from host-specific factors may have broad application among many microorganisms. Because there are no known Methanosarcina transposons we modified the mariner transposable element Himar1, originally found in the insect Hematobia irritans, to allow its use in this organism. This element was chosen because, like other mariner elements, its transposition is independent of host factors, requiring only its cognate transposase. Modified mini-Himar1 elements were constructed that carry selectable markers that are functional in Methanosarcina species and that express the Himar1 transposase from known Methanosarcina promoters. These mini-mariner elements transpose at high frequency in M. acetivorans to random sites in the genome. The presence of an Escherichia coli selectable marker and plasmid origin of replication within the mini-mariner elements allows facile cloning of these transposon insertions to identify the mutated gene. In preliminary experiments, we have isolated numerous mini-mariner-induced M. acetivorans mutants, including ones with insertions that confer resistance to toxic analogs and in genes that encode proteins involved in heat shock, nitrogen fixation, and cell-wall structures.  (+info)

Crystallization and preliminary X-ray crystallographic analysis of NADPH: azodicarbonyl/quinone oxidoreductase, a plant zeta-crystallin. (5/199)

Arabidopsis thaliana P1 protein was crystallized using the hanging drop vapor-diffusion method in 0.1 M piperazine-1, 4-bis(2-ethanesulfonic acid) buffer, containing 14% polyethylene glycol 6000 and 0.2 M magnesium acetate at pH 6.5 and 20 degrees C. The crystals are orthorhombic and belong to the space group P2(1)2(1)2(1) with unit cell dimensions of a=49.8, b=122.4 and c=149. 9 A. The diffraction data up to 2.9 A were collected by a multiwire area detector.  (+info)

Conservation of phosphorylation state of cardiac phosphofructokinase during in vitro hypothermic hypoxia. (6/199)

We investigated the metabolic effects of buffering agents alpha-amino-4-imidazole-propionic acid (Histidine), N, N-bis(2-hydroxyethyl)glycine (bicine), N, N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid (BES) on anaerobic energy production (via glycolysis) and conservation of key regulatory enzyme activity, and phosphofructokinase (PFK) throughout prolonged hypothermic hypoxia in porcine hearts. Hearts from 35 to 40 kg pigs were flushed with one of the following five solutions: St. Thomas' Hospital solution (STHS); modified University of Wisconsin (UW) solution; and three solutions containing modified UW plus 90 mM of histidine, bicine, or BES. The hearts were then stored at 4 degrees C for 10 h. After 10 h of hypothermic hypoxia, lactate values were 6.7-12.9 micromol/g higher than control; this reflected an increase in anaerobic end product of 35-67%. The consequences of enhanced anaerobic metabolism were higher ATP, total adenylate, Energy Charge, and ATP/ADP ratios in most of the buffered groups after 4-10 h cold storage; effectiveness of the buffers employed correlated with buffering capacity (BES proved to be the most effective). PFK remained activated throughout most of the 10-h period in hearts stored with buffers and did not undergo the rapid inactivation experienced by hearts stored in STHS. Conservation of PFK integrity with buffering agents was not related to a pH-mediated event; changes in kinetic parameters suggested that this protection was due to an irreversible posttranslational modification, specifically a dephosphorylation event.  (+info)

The origins of stability of spontaneous vesicles. (7/199)

Equilibrium unilamellar vesicles are stabilized by one of two distinct mechanisms depending on the value of the bending constant. Helfrich undulations ensure that the interbilayer potential is always repulsive when the bending constant, K, is of order k(B)T. When K k(B)T, unilamellar vesicles are stabilized by the spontaneous curvature that picks out a particular vesicle radius; other radii are disfavored energetically. We present measurements of the bilayer elastic constant and the spontaneous curvature, R(o), for three different systems of equilibrium vesicles by an analysis of the vesicle size distribution determined by cryo-transmission electron microscopy and small-angle neutron scattering. For cetyltrimethylammonium bromide (CTAB)/sodium octyl sulfonate catanionic vesicles, K =.7 k(B)T, suggesting that the unilamellar vesicles are stabilized by Helfrich-undulation repulsions. However, for CTAB and sodium perfluorooctanoate (FC(7)) vesicles, K = 6 k(B)T, suggesting stabilization by the energetic costs of deviations from the spontaneous curvature. Adding electrolyte to the sodium perfluorooctanoate/CTAB vesicles leads to vesicles with two bilayers; the attractive interactions between the bilayers can overcome the cost of small deviations from the spontaneous curvature to form two-layer vesicles, but larger deviations to form three and more layer vesicles are prohibited. Vesicles with a discrete numbers of bilayers at equilibrium are possible only for bilayers with a large bending modulus coupled with a spontaneous curvature.  (+info)

2-Bromoethanesulfonate affects bacteria in a trichloroethene-dechlorinating culture. (8/199)

Long-term exposure to 2-bromoethanesulfonate (BES), an agent known to inhibit methanogenesis, altered the bacterial community structure of an anaerobic enrichment culture that reductively dechlorinated trichloroethene (TCE). BES did not hinder the dechlorination of TCE or other chlorinated ethenes as previously reported, although different intermediates and end products were observed.  (+info)

EWGs Tap Water Database Perfluorooctane sulfonate (PFOS) results for North Las Vegas Utilities | Perfluorooctane sulfonate (PFOS). Find out what is in your tap water
EWGs Tap Water Database Perfluorooctane sulfonate (PFOS) results for Belton | Perfluorooctane sulfonate (PFOS). Find out what is in your tap water
Having found previously that high-dose, short-term dietary exposure of mice to perfluorooctanesulfonate (PFOS) or perfluorooctanoate (PFOA) suppresses adaptive immunity, in the present study we characterize the effects of these fluorochemicals on the innate immune system. Male C57BL/6 mice receiving 0.02% (w/w) PFOS or PFOA in their diet for 10 days exhibited a significant reduction in the numbers of total white blood cells (WBC), involving lymphopenia in both cases, but neutropenia only in response to treatment with PFOA. Moreover, both compounds also markedly reduced the number of macrophages (CD11b(+) cells) in the bone marrow, but not in the spleen or peritoneal cavity. The ex vivo production of tumor necrosis factor-alpha (TNF-alpha) and interleukin 6 (IL-6) by peritoneal macrophages isolated from animals treated with PFOA or PFOS was increased modestly. Moreover, both fluorochemicals markedly enhanced the ex vivo production of these same cytokines by peritoneal and bone marrow macrophages ...
TY - JOUR. T1 - Novel non-targeted analysis of perfluorinated compounds using fluorine-specific detection regardless of their ionisability (HPLC-ICPMS/MS-ESI-MS). AU - Azua Jamari, Nor Laili. AU - Dohmann, Jan Frederik. AU - Raab, Andrea. AU - Krupp, Eva M.. AU - Feldmann, Joerg. N1 - NLAJ thanks the Malaysian Government (Grant number: RG12824-10) and the National Defence University of Malaysia for financial support throughout the study period, while JFD thanks the Erasmus program of the EU. Special thanks to the Swedish Research Council (Grant number: FORMAS 1397306) for additional financial support in this project.. PY - 2019/4/11. Y1 - 2019/4/11. N2 - Although perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) have been phased out, there is a plethora of per- or polyfluoroalkyl substances (PFAS) generated and only a small number of these compounds are currently being monitored in environmental and biological sample using molecular mass spectrometry (MS). Total fluorine ...
Concentrations of perfluorinated chemicals (PFCs) were measured in surface waters and sediments from the Coosa River watershed in northwest Georgia, USA, to examine their distribution downstream of a suspected source. Samples from eight sites were analyzed using liquid chromatography‐tandem mass spectrometry. Sediments were also used in 28‐d exposures with the aquatic oligochaete, Lumbriculus variegatus, to assess PFC bioaccumulation. Concentrations of PFCs in surface waters and sediments increased significantly below a land‐application site (LAS) of municipal/industrial wastewater and were further elevated by unknown sources downstream. Perfluorinated carboxylic acids (PFCAs) with eight or fewer carbons were the most prominent in surface waters. Those with 10 or more carbons predominated sediment and tissue samples. Perfluorooctane sulfonate (PFOS) was the major homolog in contaminated sediments and tissues. This pattern among sediment PFC concentrations was consistent among sites and reflected
TY - JOUR. T1 - Perfluorooctane sulfonate-induced hepatic steatosis in male sprague dawley rats is not attenuated by dietary choline supplementation. AU - Bagley, Bradford D.. AU - Chang, Shu Ching. AU - Ehresman, David J.. AU - Eveland, Alan. AU - Zitzow, Jeremiah D.. AU - Parker, George A.. AU - Peters, Jeffrey M.. AU - Wallace, Kendall B.. AU - Butenhoff, John L.. N1 - Publisher Copyright: © The Author 2017. Published by Oxford University Press on behalf of the Society of Toxicology. All rights reserved.. PY - 2017/12/1. Y1 - 2017/12/1. N2 - Perfluorooctane sulfonate (PFOS) is an environmentally persistent chemical. Dietary 100ppm PFOS fed to male mice and rats for 4 weeks caused hepatic steatosis through an unknown mechanism. Choline deficient diets can cause hepatic steatosis. A hepatic choline:PFOS ion complex was hypothesized to cause this effect in mice. This study tested whether dietary choline supplementation attenuates PFOS-induced hepatic steatosis in rats. Sprague Dawley rats ...
Article Perfluorinated chemicals (PFCs) in water purification plants (WPPs) with advanced treatment processes. A series of perfluorinated chemicals (PFCs) surveys were conducted in two water purification plants (WPPs) having ozonation and granular ac...
The European Commission this year will consider a proposal to restrict the manufacture or sale of perfluorohexane sulfonic acid (PFHxS), its salts, or substances that degrade into PFHxS. These chemicals are used as water and stain repellents in textile treatment, according to the European Chemicals Agency (ECHA). They are part of a group known as per- and polyfluoroalkyl substances (PFAS) that are highly persistent in the environment. PFHxS is highly bioaccumulative and has been detected in human blood and in wildlife in the Arctic and other remote places. Use of PFHxS and its related compounds has declined in recent years, ECHA says, adding that current annual emissions of these substances in the EU are estimated at about 0.42 metric tons. Norway initiated the proposal to restrict PFHxS and its related compounds, with the goal to prevent their use in place of perfluorooctanesulfonic acid, which is already banned in the European Union, or perfluorooctanoic acid, which will be prohibited there as ...
Perfluoroalkyl acids (PFAAs) are man-made chemicals. Their unique properties make them beneficial for a wide range of industrial and consumer applications, such as constituents in fire fighting foams, hydraulic oils and food packaging materials.PFAAs have shown to be highly persistent in the environment, and the toxicological potential of long chain PFAA homologues is of a concern. International regulation and voluntary actions by the industry have been implemented and led to reduced primary emissions of PFAAs to the environment. However, the concentrations of some PFAAs in e.g. birds from the Baltic Sea are still very high and of ecotoxicological concern. Measures to reduce the PFAA contamination require an understanding of the sources and how the PFAAs are being transported in the environment.In this licentiate thesis a mass balance was assembled for perfluorohexanoic acid (PFHxA), perfluorooctanoic acid (PFOA), perfluorodecanoic acid (PFDA) and perfluorooctane sulfonic acid (PFOS) in the ...
Little is known about factors influencing infant perfluorinated alkyl acid (PFAA) concentrations. Associations between serum PFAA concentrations in 2-4-month-old infants (n = 101) and determinants were investigated by multiple linear regression and general linear model analysis. In exclusively breastfed infants, maternal serum PFAA concentrations 3 weeks after delivery explained 13% (perfluoroundecanoic acid, PFUnDA) to 73% (perfluorohexanesulfonate, PFHxS) of infant PFAA concentration variation. Median infant/maternal ratios decreased with increasing PFAA carbon chain length from 2.8 for perfluoroheptanoic acid and perfluorooctanoic acid (PFOA) to 0.53 for PFUnDA and from 1.2 to 0.69 for PFHxS and perfluorooctanesulfonate (PFOS). Infant PFOA, perfluorononanoic acid (PFNA), and PFOS levels increased 0.7-1.2% per day of gestational age. Bottle-fed infants had mean concentrations of PFAAs 2 times lower than and a mean percentage of branched (%br) PFOS isomers 1.3 times higher than those of ...
Market Research Reports Search Engine (MRRSE) has been serving as an active source to cater intelligent research report to enlighten both readers and investors. This research study titled Sodium Lauryl Sulfate Market. Request a Free Sample Report @ https://www.mrrse.com/sample/984. Increasing demand for sodium lauryl sulfate (SLS), sodium laureth ether sulfate (SLES) and linear alkylbenzene sulfonate (LAS) from detergents & cleaners and personal care industries is expected to drive the global SLS, SLES & LAS market in the next five years. However, the adverse effect of SLS and SLES on human skin coupled with fluctuation in prices of linear alkylbenzene sulfonate is anticipated to hamper market growth. Emerging applications such as paints & coatings and oilfield chemicals are estimated to offer immense opportunities for players in the market. SLS, SLES and LAS are the major forms of anionic surfactants. However, LAS accounts for nearly 40% of the global anionic surfactants market.. The report ...
http://www.ntn.org.au/featured/firefighters-community-and-environment-at-risk-from-perfluorinated-chemcialsFirefighters, community and environment at risk from perfluorinated chemcialsNTN has released its new report on the Persistence and Toxicity of Perfluorinated Compounds in Australia.
Perfluorooctanesulfonyl fluoride (POSF, C8F17SO2F) is used to create applications for surfactants and paper, packaging, and surface (e.g., carpets, textiles) protectants. Such POSF-based products or their residuals may degrade or metabolize to PFOS (C8F17SO3-). PFOS concentrates in liver and serum a …
ASTM-D1768 Standard Test Method for Sodium Alkylbenzene Sulfonate in Synthetic Detergents by Ultraviolet Absorption - sodium alkylbenzene sulfonate; synthetic detergents; ultraviolet absorption ;; ICS Number Code 71.100.40 (Surface active agents)
Get Information of Alkylbenzene Sulfonate Manufacturers, Suppliers, Dealers, Exporters, Traders, Producers, Wholesalers, Alkylbenzene Sulfonate Companies in Aurangabad, India
We utilized milk samples obtained from a survey of 219 primiparous mothers in 2009 to test for the presence of new persistent organic pollutants: hexachlorocyclohexane (HCH), pentachlorobenzene (PeCB), chlordecone, polybrominated biphenyls (PBBs), polybrominated diphenyl ethers (PBDEs), and perfluorinated compounds (PFCs), including perfluorooctane sulfonic acid (PFOS), perfluorooctane sulfonyl fluoride (PFOS-F), and perflurooctanoic acid (PFOA). 158 samples were pooled according to the mothers age, length of stay in Hong Kong, and their dietary habits (frequencies of intake of fish and other seafood, and milk and dairy products) and tested for chlordecone, PBDEs, PBBs and PFCs. All were present in our samples. Their mean and median concentrations are very high compared to findings in other countries. HCH and PeCB were tested in 73 individual samples and their mean levels were of the same order of magnitude as those reported in our previous study. The levels of PBDEs were positively associated ...
Paola Irato, Sara Trabucco and Laura Tallandini-Emerging Contaminants Such as Perfluorinated Compounds: Toxicity andOxidative Stress
There is increasing global concern regarding the health impacts of perfluoroalkyl and polyfluoroalkyl substances (PFAS), which are emerging environmental endocrine disruptors. Results from previous epidemiological studies on the associations between PFAS exposure and sex hormone levels are inconsistent. We examined the associations between serum PFAS compounds (PFDeA, PFHxS, PFNA, PFOA, PFOS) and sex hormones, including total testosterone (TT), free testosterone (FT), estradiol (E), and serum hormone binding globulin (SHBG). After adjusting for potential confounders, PFDeA, PFOS, and PFHxS exposures were significantly associated with increased serum testosterone concentrations in males. PFDeA, PFOA, and PFOS exposures were positively correlated with FT levels in 20-49-year-old women, while PFOS exposure was negatively associated with TT levels in 12-19-year-old girls. PFAS exposure was negatively associated with estradiol levels including: PFDeA in all females, PFHxS, PFNA, PFOS, and PFOA in 12-19-year
A survey on seasonal concentration changes of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) was performed for surface water in Lake Biwa (14 sites) from February to November in 20
Per- and polyfluoroalkyl substances (PFAS) are environmental chemicals linked to weight gain and type 2 diabetes.We examined the extent to which PFAS plasma concentrations during pregnancy were associated with postpartum anthropometry and biomarkers.We studied women recruited between 1999-2002 in the Project Viva prospective cohort with pregnancy plasma concentrations of PFAS, including perfluorooctanesulfonic acid (PFOS), perfluorooctanoic acid (PFOA), and 2-(N-ethyl-perfluorooctane sulfonamide) acetic acid (EtFOSAA). Three-year postpartum anthropometry measurements were available from 786-801 women, blood pressure from 761 women, and blood biomarkers from 450-454 women. We used multivariable regression to evaluate the association of log2-transformed PFAS with postpartum anthropometry, blood pressure, and blood biomarkers (leptin, adiponectin, sex hormone binding globulin [SHBG], hemoglobin A1c [HbA1c], interleukin-6 [IL-6], C-reactive protein [CRP]), adjusting for age, pre-pregnancy BMI, ...
Link: Shabalina Irina G, Kalinovich AV, Cannon B, Nedergaard J (2015) Event: MiP2015 The environmental pollutants perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) are degradation products of polyfluorinated surfactants and polymers that due to their unique surface-active properties, the stability of their C-F bonds and their thermal resistivity, are utilized in a wide variety of products, including fire-fighting foams, lubricants, paints, cosmetics and ski-wax. PFOS/PFOA cause a dramatic reduction in the size of the major adipose tissue depots when they are added to the food of mice. A large part of the effect of PFOA/PFOS on food intake was dependent on the presence of the uncoupling protein 1 (UCP1) in the brown adipose tissue [1]. We have examined here the possibility that PFOA/PFOS can directly (re)activate UCP1 in isolated mouse brown-fat mitochondria. In wildtype brown-fat mitochondria, PFOS and PFOA overcame GDP-inhibited thermogenesis, leading to increased oxygen ...
TY - JOUR. T1 - PFAS exposure and overweight/obesity among children in a nationally representative sample. AU - Geiger, Sarah Dee. AU - Yao, Ping. AU - Vaughn, Michael G.. AU - Qian, Zhengmin. N1 - Publisher Copyright: © 2020 Elsevier Ltd. PY - 2021/4. Y1 - 2021/4. N2 - Purpose: Perfluoroalkyl substances (PFASs) are a class of manmade chemicals commonly used in consumer product manufacturing. Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) are two of the most highly studied PFASs. Both are present in the blood of the most Americans. PFASs are associated with intermediate cardiovascular disease (CVD) outcomes, but their relationship with obesity, a risk factor for intermediate and advanced CVD, remains largely unconfirmed. In this context, we aimed to explore the relationship between PFASs and both overweight/obesity and abdominal obesity among children. Methods: We examine associations between PFOA and PFOS levels, and Body Mass Index (BMI) and waist circumference (WC) in a ...
redOrbit Staff & Wire Reports - Your Universe Online. Researchers at NISTs Hollings Marine Laboratory (HML) and four partner organizations have measured for the first time concentrations of 13 perfluoroalkyl compounds (PFCs) in five endangered species of sea turtles. While PFC toxicology studies have not yet been conducted on turtles, the levels of the compounds seen in all five species approach the amounts known to cause unfavorable health effects in other animals.. PFCs are man-made compounds that have many uses including stain-resistant coatings, fire-fighting foams and emulsifiers in plastics manufacturing. They are detectable in human and wildlife samples worldwide, infiltrate food chains, and have been shown in laboratory animals - rats, mice and fish - to be toxic to the liver, the thyroid, neurobehavioral function and the immune system. The PFCs most frequently found in the environment are perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA).. Located in Charleston, S.C., ...
Per- and polyfluoroalkyl substances (PFAS) are a group of synthetic compounds found in a variety of household and industrial products. The two most studied compounds in this family, perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS), have been associated with a range of health concerns. The following webinar recording describes two pilot projects designed to measure human PFAS exposures undertaken by the Pennsylvania Department of Health and the New York State Department of Health. It focuses on the states use of the PFAS Exposure Assessment Technical Tools (PEATT)-a guidance document developed by CDC and the Agency for Toxic Substances and Disease Registry to measure human PFAS exposures through drinking water sources. Results from PEATT allow health officials to estimate levels of exposure for an entire affected community, not just those individuals tested. The PEATT also provides guidance on how to share results with affected communities.Read More ». ...
The IUPHAR/BPS Guide to Pharmacology. alkylbenzene sulfonate ligand page. Quantitative data and detailed annnotation of the targets of licensed and experimental drugs.
Article Adsorption of four perfluorinated acids on non ion exchange polymer sorbents. Perfluorinated compounds (PFCs) have attracted global concern due to their ubiquitous distribution and properties of persistence, bio accumulation and toxicity. The...
Several environmental contaminants, such as polychlorinated biphenyls, dioxins, bisphenol A and phthalates, have been linked to diabetes. We therefore investigated whether other kinds of contaminants, perfluoroalkyl substances (PFAS), also called perfluorinated compounds (PFCs), are also associated with diabetes. The Prospective Investigation of the Vasculature in Uppsala Seniors (PIVUS) study investigated 1,016 men and women aged 70 years. Seven PFAS were detected in almost all participant sera by ultra-high performance liquid chromatograph/tandem mass spectrometry. Diabetes was defined as use of hypoglycaemic agents or fasting glucose , 7.0 mmol/l. 114 people had diabetes. In the linear analysis, no significant relationships were seen between the seven PFAS and prevalent diabetes. However, inclusion of the quadratic terms of the PFAS revealed a significant non-linear relationship between perfluorononanoic acid (PFNA) and diabetes, even after adjusting for multiple confounders (OR 1.96, 95% CI ...
DOI: 10.1016/j.envpol.2020.115908. Perfluoroalkyl acids (PFAAs) are widely used in industrial production and daily life because of their unique physicochemical properties, such as their hydrophobicity, oleophobicity, surface activity, and thermal stability. Perfluorosulfonic acids (PFSAs) and perfluorocarboxylic acids (PFCAs) are the most studied PFAAs due to their global occurrence. PFAAs are environmentally persistent, toxic, and the long-chain homologs are also bioaccumulative. Exposure to PFAAs may arise directly from emission or indirectly via the environmental release and degradation of PFAA precursors. Precursors themselves or their conversion intermediates can present deleterious effects, including hepatotoxicity, reproductive toxicity, developmental toxicity, and genetic toxicity. Therefore, exposure to PFAA precursors constitutes a potential hazard for environmental contamination. In order to comprehensively evaluate the environmental fate and effects of PFAA precursors and their ...
MELVILLE, NY--(Marketwired - October 11, 2017) - Napoli Shkolnik PLLC has filed a class action lawsuit against five manufacturers of aqueous firefighting foams (AFFF) containing perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) for the contamination of the groundwater relied upon by the residents of Yaphank, New York. The class action...
TY - JOUR. T1 - L-carnitine via PPARγ- and Sirt1-dependent mechanisms attenuates epithelial-mesenchymal transition and renal fibrosis caused by perfluorooctanesulfonate. AU - Chou, Hsiu Chu. AU - Wen, Li Li. AU - Chang, Chih Cheng. AU - Lin, Chien Yu. AU - Jin, Lu. AU - Juan, Shu Hui. PY - 2017/12/1. Y1 - 2017/12/1. N2 - We have previously reported that perfluorooctanesulfonate (PFOS) causes cell apoptosis in renal tubular epithelial cells (RTCs). Here, we extend our findings and provide evidence of epithelial-mesenchymal transition (EMT)-associated renal fibrosis caused by PFOS and the protection by L-carnitine. Our results demonstrate that PFOS increased the expression of EMT and renal injury biomarkers (eg, N-cadherin, vimentin, Snail, Kim1, and Lcn2). In addition, PFOS caused EMT induction through Sirt1-mediated PPARγ deacetylation and inactivation. L-carnitine reversed the EMT induction caused by PFOS and alleviated PFOS-mediated increases in cellmigration by reactivating PPARγ through ...
TY - JOUR. T1 - Molecular design of liquid crystalline poly(ester-amide)s with perfluoroalkyl spacers. AU - Teoh, May May. AU - Chung, Tai-Shung. AU - Cheng, Si Xue. AU - Lin, Ting Ting. AU - Pramoda, K. P.. PY - 2004/6/1. Y1 - 2004/6/1. N2 - We have introduced a series of perfluoroalkyl dicarboxylic acids with different lengths of fluorinated aliphatic segments into the 2,6-acetoxynaphthoic acid (ANA) and acetoxy acetanilide (AAA) systems; and their effects on the evolution of liquid crystal texture and liquid crystallinity have been investigated. The perfluoroalkyl dicarboxylic acids are tetrafluorosuccinic acid (TFSA, n = 2), hexafluoroglutaric acid (HFGA, n = 3), perfluorosuberic acid (PFSUA, n = 6) and perfluorosebacic acid (PFSEA, n = 8). Computational results based on the RIS Metropolis Monte Carlo method indicate that the ANA/AAA/perfluoroalkyl system may form thermotropic liquid crystalline polymers (LCPs) because the calculated persistence ratios are greater than 6.42. Computational ...
Chen, M-H, E-H Ha, T-W Wen, Y-N Su, G-W Lien, C-Y Chen, P-C Chen and W-S Hsieh. 2012. Perfluorinated compounds in umbilical cord blood and adverse birth outcomes.. Synopsis:. Babies exposed to higher levels of the chemical PFOS in the womb were born sooner and smaller than babies with lower exposures, suggests a new study of 429 babies from Taiwan. They also had smaller head circumferences.. PFOS levels in the babies umbilical cord blood were similar to those collected from U.S. and Canadian babies in 2004 - 2005. Birth outcomes were unaffected by the other studied chemicals - PFOA, PFNA and PFUA.. This is the first time that PFOS has been related to shorter pregnancies. Effects on birth weight and head circumference support the findings from previous studies.. The results are important because nearly everyone carries PFOS in their blood. Even subtle effects at an individual level can have important public health consequences at the population scale if everyone is exposed.. PFOS is a stain, ...
We reported the hepatic gene expression profiling in mice treated by perfluorooctanoate (PFOA) and high fat diet (HFD). Chronic HFD treatment was associated with gene expression changes in cholesterol biosynthetic process, lipid metabolic process, extracellular matrix, and inflammatory response pathways. Many chemokine related genes including Ccl2, Ccr2, Ccl3l3, Cx3cl1, Cx3cr1, Cxcl14, and toll-li...
PFCs are synthetic organic compounds, based on fluorine. Used in stain, heat and water-resistant products (eg Teflon). Toxic to lab animals. Bioaccumulative
Jusko T, Oktapodas M, Palkovi?ová Murinová ?, Babinska K, Babjakova J, Verner MA, DeWitt J, Thevenet-Morrison K, Conka K, Drobná B, Chovancova J, Thurston S, Lawrence BP, Dozier A, Jarvinen K, Patayova H, Trnovec T, Legler J, Hertz-Picciotto I, Lamoree MH. Demographic, Reproductive, and Dietary Determinants of Perfluorooctane Sulfonic (PFOS) and Perfluorooctanoic Acid (PFOA) Concentrations in Human Colostrum. Environmental science & technology.. 2016 Jul 5; 50(13):7152-62. Epub 2016 Jun 14. 5/ ...
Aceptado junio 2009. ABSTRACT. The aim of this study was to determine the effect of linear alkylbenzene sulfonate (LAS), anthracene and a LAS anthracene mixture on the growth of a microbial consortium isolated from polluted sediment. The microbial consortium was grown in a sterile glass bottle with mineral medium containing 1 g/L of glucose. Microbial growth inhibition produced by LAS, anthracene and combinations of LAS and anthracene was determined by viable count in nutritive agar; inhibitory concentration 50 (IC50) was calculated. The concentrations evaluated were 0.16, 0.8, 1.6, 16 and 160 mg/L of LAS or anthracene. The LAS anthracene mixtures were prepared by fixing either LAS or anthracene at 0.16 mg/L while increasing the other compound at the above concentrations. Microbial growth was sensitive to LAS at an IC50 of 8.22 and to anthracene at an IC50 of 5.2 mg/L. In the LAS anthracene combination, if LAS concentration was fixed and anthracene concentration varied, IC50 (5.92 mg/L) was ...
To determine whether exposure to per-and polyfluoroalkyl susbtances at an early developmental stage is associated with risk for autism spectrum disorders.
Alkanes C10-C13, chloro (short-chain chlorinated paraffins) (SCCPs): 10 000 mg/kg;. Aldrin: 5 000 mg/kg;. Chlordane: 5 000 mg/kg;. Chlordecone: 5 000 mg/kg;. DDT (1,1,1-trichloro-2,2-bis (4-chlorophenyl) ethane): 5 000 mg/kg;. Dieldrin: 5 000 mg/kg;. Endosulfan: 5 000 mg/kg;. Endrin: 5 000 mg/kg;. Heptachlor: 5 000 mg/kg;. Hexabromobiphenyl: 5 000 mg/kg;. Hexachlorobenzene: 5 000 mg/kg;. Hexachlorobutadiene: 1 000 mg/kg;. Hexachlorocyclohexanes, including lindane: 5 000 mg/kg;. Mirex: 5 000 mg/kg;. Pentachlorobenzene: 5 000 mg/kg;. Perfluorooctane sulfonic acid and its derivatives (PFOS). (C8F17SO2X). (X = OH, Metal salt (O-M+), halide, amide, and other derivatives including polymers): 50 mg/kg;. Polychlorinated Biphenyls (PCB) (3): 50 mg/kg;. Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/PCDF) (4): 5 mg/kg;. Polychlorinated naphthalenes*: 1 000 mg/kg;. Sum of the concentrations of tetrabromodiphenyl ether C12H6Br4O), pentabromodiphenyl ether (C12H5Br5O), hexabromodiphenyl ether ...
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1. Shall not be manufactured, or placed on the market as substances on their own from 4 July 2020.. 2. Shall not, from 4 July 2020, be used in the production of, or placed on the market in: (a) another substance, as a constituent; (b) a mixture; (c) an article, in a concentration equal to or above 25 ppb of PFOA including its salts or 1 000 ppb of one or a combination of PFOA-related substances.. 3. Points 1 and 2 shall apply from:. (a) 4 July 2022 to: (i)equipment used to manufacture semi-conductors; (ii) latex printing inks. (b) 4 July 2023 to: (i) textiles for the protection of workers from risks to their health and safety; (ii) membranes intended for use in medical textiles, filtration in water treatment, production processes and effluent treatment; (iii) plasma nano-coatings. (c)4 July 2032 to medical devices other than implantable medical devices within the scope of Directive 93/42/EEC.. 4. Points 1 and 2 shall not apply to any of the following:. (a) perfluorooctane sulfonic acid and its ...
(2009) Benskin et al. Environmental Science and Technology. The exposure sources of perfluorooctane sulfonate (PFOS) in humans and wildlife are not well characterized. Human biomonitoring data show that PFOS profiles may consist of up to approximately 50% b...
Porous microspheres have fixed on the exterior surface thereof a coating of at least one of a perfluorinated oil, a fluorinated silicone oil or a silicone gum. The pores of the microspheres can be charged with a hydrophilic, lipophilic or perfluorinated phase. The microspheres are employed in cosmetic compositions.
Time to pregnancy for women with highest blood levels of two chemicals was 134% and 154% longer, vs. those with the lowest levels
Hepatotoxic perfluorinated chemicals Perfluorinated compounds are a group of manmade chemicals that were used for decades before their environmental significance was realised. Once they enter the environment they are incredibly stable and, along with several other groups of chemicals, have been labelled emerging contaminants. According to the US...
southern coastal Maine.. PFOS Concentrations in Osprey Eggs in Casco Bay [See graph]. • PCBs, PBDEs, PFCs and OCs were found in all of the osprey eggs sampled in 2007 and 2009.. • Deca-PBDE was detected in 10 of 12 osprey eggs collected in Casco Bay.. • PFOS in an egg from Flag Island were the highest ever seen in Maine wildlife, and among the highest ever observed in a bird egg.. • Fully 75 percent of osprey eggs had PFOS concentrations exceeding the threshold for negative health effects established for chickens (100 ng/g, wet weight).. • No spatial trend was detectable among the samples, suggesting that point sources, watershed characteristics and food web dynamics may all play a role in exposure to contaminants (Goodale 2010).. With support from CBEP and other partners, in 2007 BioDiversity Research Institute (BRI) began the first study to measure PBDEs, PFCs, PCBs, OCs and mercury in eggs from 23 species of birds in Maine from ocean, estuary, river, lake and terrestrial habitats. ...
Our study found that increased exposure to PFOA, PFOS, PFNA, and PFHxS was associated with higher odds of irregular and long menstrual cycle and lower risks of menorrhagia in women who plan to be pregnant. In contrast, women with higher levels of PFOA, PFNA, and PFHxS were more likely to have hypomenorrhea.. Two previous studies have evaluated the association between PFOA and PFOS and menstrual irregularity and length. Our results are consistent with those reported in a subset of 1,240 pregnant women randomly selected from the Danish National Birth Cohort (Fei et al. 2009). They found that the risk of irregular menstrual cycle was higher in women exposed to PFOA (15.0% in the upper three quartiles vs. 9.0% in the lowest quartile) and PFOS (14.2% in the upper three quartiles vs. 11.6% in the lowest quartile) (Fei et al. 2009). The INUENDO cohort enrolled 1,623 pregnant women in three countries (Greenland, Poland, and Ukraine) (Lyngsø et al. 2014) and found that PFOA exposure levels were ...
Perfluoroalkyl (PFAS) substances are widespread in the environment and in organisms. The fact that exposure to PFAS is associated with elevated cholesterol levels is a major concern for human health. Previous investigations, in which bovine serum albumin was frequently studied, indicate that PFOS, PFOA and PFNA bind to serum albumin. However, it is critical to know whether these and other PFAS have a preference for the protein or the lipid fraction in native human blood fractions. For this reason, blood samples from four young healthy volunteers (two women, two men, 23-31 years old) were used for protein size separation and fractionation by the Cohn method in combination with serial ultracentrifugation. The plasma fractions were analyzed for 11 PFAS using high-performance tandem mass spectrometry (HPLC-MS/MS). Although the data are based on a small sample, they clearly show that albumin is the most important carrier protein for PFOS, PFOA, PFHxS, PFNA and PFDA in native human plasma. These five ...
kinase 1/2 signaling in neurons and glial cells. Eur. J. Pharmacol. 674 (2-3), 104-111 Mahltig B, Cheval N, Astachov V, Malkoch M, Haase H, Fahmi A (2012) 2,5 Hydroxyl dendrimers as stabilizing agent for preparation of colloidal silver particles - a study in respect to antimicrobial properties and toxicity against human cells. Colloid Polym. Sci. 290:1413-1421 Haase H, Engelhardt G, Hebel S, Rink L (2011) Mercuric ions inhibit mitogen-activated protein kinase dephosphorylation by inducing reactive oxygen species. Toxicol. Appl. Pharmacol. 250(1), 78-86 Brieger A, Bienefeld N, Hasan R, Goerlich R, Haase H (2011) Impact of perfluorooctanesulfonate and perfluorooctanoic acid on human peripheral leukocytes. Toxicol. in Vitro. 25(4), 960-968 Mahltig B, Reibold M, Gutmann E, Textor T, Gutmann J, Haufe H, Haase H (2011) Preparation of Silver Nanoparticles Suitable for Textile Finishing Processes to Produce Textiles with Strong Antibacterial Properties against Different Bacteria Types. Z. Naturforsch. B ...
Perfluorooctanesulfonate (PFOS) was produced and used by various industries and in consumer products. Because of its persistence, it is ubiquitous in air, water, soil, wildlife, and humans. Although the adverse effects of PFOS on male fertility have been reported, the underlying mechanisms have not …
The widespread occurrence and environmental persistence of perfluorinated compounds (PFCs) received worldwide attention recently. Exhaustive analysis of all fluorinated compounds in an environmental sample can be daunting because of the constraints in the availability of analytical standards and extraction methods. Combustion ion chromatographic technique for trace fluorine analysis was used to assess the concentrations of known PFCs (e.g., PFOS, PFOA) and total fluorine (TF) in the blood of wild rats collected from Japan. The technique was further validated using tissues from PFOA-exposed rats. Six PFCs (PFOS, PFOSA, PFUnDA, PFDA, PFNA, and PFOA) were detected in all of the wild rat blood samples. Concentrations of extractable organic fluorine (EOF) in fraction 1 (Fr1; MTBE extraction) of wild rats ranged 60.9-134 ng F mL-1, while those in fraction 2 (Fr2; hexane) were below LOQ (32 ng F mL-1); TF concentrations in the blood of wild rats ranged from 59.9-192 ng F mL-1. The contribution of known ...
Field, Lamar; Settlage, Paul H. (March 1954). "Alkanesulfonic Acid Anhydrides". Journal of the American Chemical Society. 76 (5 ... Methanesulfonic anhydride is the acid anhydride of methanesulfonic acid. Like methanesulfonyl chloride, it may be used to ... It is commercially available but may also be prepared by the reaction of phosphorus pentoxide with methanesulfonic acid at 80 ° ... C. P2O5 + 6 CH3SO3H → 3 (CH3SO2)2O + 2 H3PO4 Disulfuric acid Sodium pyrosulfate Acetic anhydride Trifluoromethanesulfonic ...
... s are esters of alkane sulfonic acids with the general formula R-SO2-O-R'. They act as alkylating agents, some ...
The rationale that an a-branched alkanesulfonic acid ester of ethinyl estradiol with a medium chain length should lead to a ...
US 2693488, A.R. Sexton, "Purification of amino alkane sulfonic acids by ion exchange", issued 1954-11-02, assigned to The Dow ... N-Methyltaurine (2-methylaminoethanesulfonic acid) is an aminosulfonic acid which is present as a zwitterion in the crystalline ... An obvious modification for this reaction is the replacement of the silver salt of 2-chloroethanesulfonic acid by the sodium ... doi:10.1021/ie50451a024.. US 7049464, T. Kimura et al., "Process for producing of an aminoalkylsulfonic acid and a method of ...
... are organofluoroanalogues of conventional alkanesulfonic acids, but they are several pKA units stronger ... The simplest example of a perfluorosulfonic acid is the trifluoromethanesulfonic acid. Perfluorosulfonic acids with six or more ... Perfluorooctanesulfonic acid, for example, has been used in hard chromium plating. Perfluorooctanesulfonic acid was included in ... Perfluorosulfonic acids (PFSAs) are chemical compounds of the formula CnF(2n+1)SO3H and thus belong to the family of ...
Direct sulfonation also converts methanesulfonic acid to methanedisulfonic acid. Many alkane sulfonic acids are obtained from ... p-Cresidinesulfonic acid is used to make food dyes. Being strong acids, sulfonic acids are also used as catalysts. The simplest ... Representative sulfonic acids and sulfonates Taurine, a bile acid, and one of the few naturally occurring sulfonic acids (shown ... The structure of sulfonic acids is illustrated by the prototype, methanesulfonic acid. The sulfonic acid group, RSO2OH features ...
Direct sulfonation also converts methanesulfonic acid to methanedisulfonic acid. Many alkane sulfonic acids are obtained from ... p-Cresidinesulfonic acid is used to make food dyes. Acid catalystsEdit. Being strong acids, sulfonic acids are also used as ... The structure of sulfonic acids is illustrated by the prototype, methanesulfonic acid. The sulfonic acid group, RSO2OH features ... p-Toluenesulfonic acid and methanesulfonic acid have pKa values of −2.8 and −1.9, respectively, while those of benzoic acid and ...
Sulfonic Acids / analysis * Water Pollutants, Chemical / analysis* Substances * Alkanesulfonic Acids * Caprylates * Drinking ... followed by perfluorobutanesulfonic acid (PFBS) (27.2%) and perfluorooctanoic acid (PFOA) (23.0%). Considering that bottled ... Furthermore, the most frequent compounds and those at higher concentrations were perfluoroheptanoic acid (PFHpA) with a mean of ... PFASs concentrations were found in tap water samples and the more frequently found compound was perfluorooctanesulfonic acid ( ...
... in particular methane sulfonic acid for increasing the permeability of underground petroliferous and/or gas-bearing carbonate ... The invention relates to the use of alkane sulfonic acids, ... EN) Use of water-soluble alkane sulfonic acids for increasing ... The invention relates to the use of alkane sulfonic acids, in particular methane sulfonic acid for increasing the permeability ... 1. CN101133135 - Use of water-soluble alkane sulfonic acids for increasing the permeability of underground petroliferous and/or ...
Organic sulfonic acids and derivatives*Organosulfonic acids and derivatives*Alkanesulfonic acids and derivatives*Alkanesulfonic ... Carboxylic acids and derivatives*Carboxylic acid derivatives*Alpha-halocarboxylic acids and derivatives*Alpha-halocarboxylic ... Naphthalene sulfonic acids and derivatives*1-naphthalene sulfonic acids and derivatives. *2-naphthalene sulfonic acids and ... Metaphosphoric Acid (H3P3O9). *Nitric Acid (HNO3)*General Purpose Concentrated Nitric Acid. *General Purpose Nitric Acid ...
Alkanesulfonic Acids / blood* * Belgium / epidemiology * Caprylates / blood* * Confounding Factors, Epidemiologic * Cross- ...
Field, Lamar; Settlage, Paul H. (March 1954). "Alkanesulfonic Acid Anhydrides". Journal of the American Chemical Society. 76 (5 ... Methanesulfonic anhydride is the acid anhydride of methanesulfonic acid. Like methanesulfonyl chloride, it may be used to ... It is commercially available but may also be prepared by the reaction of phosphorus pentoxide with methanesulfonic acid at 80 ° ... C. P2O5 + 6 CH3SO3H → 3 (CH3SO2)2O + 2 H3PO4 Disulfuric acid Sodium pyrosulfate Acetic anhydride Trifluoromethanesulfonic ...
0 (Alkanesulfonic Acids); 0 (Drinking Water); 0 (Fluorocarbons); 0 (Surface-Active Agents); 0 (Waste Water); 0 (Water ... The CBR43 could effectively decolorize high concentrations of acid blue 62 and acid black 172 (500-700 mg L ). The maximum dye ... Decolorization of acid, disperse and reactive dyes by Trametes versicolor CBR43.. [So] Source:. J Environ Sci Health A Tox ... Perfluoroalkyl acids (PFAAs) are widely used as multi-purpose surfactants or water/oil repellents. In order to understand the ...
Fiber lubricants containing high molecular weight polyacrylamido alkane sulfonic acid additives. US4943460. 15 Feb 1989. 24 Jul ... Lubricious coatings containing polymers with vinyl and carboxylic acid moieties. US5739249. 8 Ago 1995. 14 Abr 1998. Bayer ... Suitable agents include, without limitation, fatty acids, waxes, quaternary ammonium salts, dimethyl dihydrogenated tallow ...
Organosulfonic acids *Alkanesulfonic acids *Secondary alcohols *Cyclic alcohols and derivatives *Propargyl-type 1,3-dipolar ... Taurocholic acid. Description. Taurocholic acid is a bile acid and is the product of the conjugation of cholic acid with ... Bile acids are steroid acids found predominantly in the bile of mammals. The distinction between different bile acids is minute ... The major components of bile are cholic acid and chenodeoxycholic acid. In a first step the bile acids are converted to an acyl ...
Organosulfonic acid. *Organosulfonic acid or derivatives. *Organic sulfonic acid or derivatives. *Alkanesulfonic acid ... Tauroursodeoxycholic acid. Description. Tauroursodeoxycholic acid is a bile acid also known as TUDCA formed in the liver by ... Bile acids are steroid acids found predominantly in the bile of mammals. The distinction between different bile acids is minute ... Chiang JY: Bile acid regulation of hepatic physiology: III. Bile acids and nuclear receptors. Am J Physiol Gastrointest Liver ...
Alkanesulfonic Acids [D02.886.645.600.055]. *Alkanesulfonates [D02.886.645.600.055.050]. *Sodium Tetradecyl Sulfate [D02.886. ...
Sulfur Acids [D02.886.645]. *Sulfonic Acids [D02.886.645.600]. *Alkanesulfonic Acids [D02.886.645.600.055] ... It is present in milk but is isolated mostly from ox bile and strongly conjugates bile acids. ...
Examples include fluoroalkanesulfonic acids and alkanesulfonic acids and salts thereof with nitrogen compounds. ... The rinse may further contain a surfactant which is typically a fluoroalkanesulfonic acid derivative or alkanesulfonic acid ... 4. The rinse of claim 3, wherein said surfactant comprises a fluoroalkanesulfonic acid derivative or alkanesulfonic acid ... The surfactant is preferably selected from fluoroalkanesulfonic acid derivatives and alkanesulfonic acid derivatives. ...
Previous Patent: EFFICIENT COPPER LEACHING USING ALKANESULFONIC ACIDS. Next Patent: ROLL DIAPHRAGM COMPRESSOR AND LOW-PRESSURE ...
Organosulfonic acids and derivatives Direct Parent. Organosulfonic acids Alternative Parents. *Sulfonyls *Alkanesulfonic acids ... These are compounds containing the sulfonic acid group, which has the general structure RS(=O)2OH (R is not a hydrogen atom).. ... This compound belongs to the class of organic compounds known as organosulfonic acids. ... while gamma-aminobutyric acid type A receptors are activated. Reports indicate that acamprosate only works with a combination ...
Sulfur Acids [D02.886.645]. *Sulfonic Acids [D02.886.645.600]. *Alkanesulfonic Acids [D02.886.645.600.055] ...
In the system of alkane sulfonic acid, matte pure tin electroplating process.Single agent, low foam type. Normal temperature ... Cross-linked hyaluronic acid: 24mg/ml Lidocaine HCL: 3mg/ml Phosphate-buffered saline,ph: qs Rejeunesse Deep with lidocaine is ... Rejeunesse Deep , Dermal Fillers , 1 x 1.1ml gel pre-filled syringe , Cross-linked hyaluronic acid , 0.3% of Lidocaine ...
Perfluorosulfonic acids are organofluoroanalogues of conventional alkanesulfonic acids, but they are several pKA units stronger ... The simplest example of a perfluorosulfonic acid is the trifluoromethanesulfonic acid. Perfluorosulfonic acids with six or more ... Perfluorooctanesulfonic acid, for example, has been used in hard chromium plating. Perfluorooctanesulfonic acid was included in ... Perfluorosulfonic acids (PFSAs) are chemical compounds of the formula CnF(2n+1)SO3H and thus belong to the family of ...
Direct sulfonation also converts methanesulfonic acid to methanedisulfonic acid. Many alkane sulfonic acids are obtained from ... p-Cresidinesulfonic acid is used to make food dyes. Acid catalystsEdit. Being strong acids, sulfonic acids are also used as ... The structure of sulfonic acids is illustrated by the prototype, methanesulfonic acid. The sulfonic acid group, RSO2OH features ... p-Toluenesulfonic acid and methanesulfonic acid have pKa values of −2.8 and −1.9, respectively, while those of benzoic acid and ...
Surface treatment of aluminum or aluminum alloys by means of formulations comprising alkanesulfonic acids ... an organic acid or asalt of these acids and containing a small amount of a metal salt, to absorb the metal in the metal salt or ... or a mlneral acid or organic acid to which one or more metal salts have been added, at room temperature by means of a direct ... The alloy was used as an anode and subjected to an anodic oxidation for 30 minutes in an aqueous solution of a sulfuric acid to ...
Surface treatment of aluminum or aluminum alloys by means of formulations comprising alkanesulfonic acids ... The mineral acid component of the electrolyte is advantageously sulfuric acid or phosphoric acid. Where sulfuric acid is used, ... The organic carboxylic acids containing a reactive group in alpha-position to the carboxylic acid group include acids in which ... The resulting alkali salts of the titanic acid complexes are water-soluble, and acid-soluble, and are stable in acid solutions ...
We also Provide Trading Suppliers & Manufacture for 75-75-2 Methanesulfonic acid. ... ChEBI: An alkanesulfonic acid in which the alkyl group directly linked to the sulfo functionality is methyl. ... Organic Acids;Synthetic Reagents;Organic AcidsAnalytical Reagents;Products for Amino Acid Hydrolysis;Amino Acid Analysis; ... Dry the acid, either by azeotropic removal of water with *benzene or toluene, or by stirring 20g of P2O5 with 500mL of the acid ...
The invention also relates to a method for cleaning rust from all types of surfaces using at least one alkane sulphonic acid. ... acid, with formula R--SO.sub.3H, where R represents a saturated, linear or branched hydrocarbon chain, comprising 1 to 4 atoms ... dueto the acid nature of the alkanesulfonic acids used.. For example, the alkanesulfonic acids used in the context of the ... phosphoric acid, nitric acid, sulfamic acid, acetic acid, citric acid, formic acid, lactic acid, glycolic acid, oxalic acid, an ...
... will take place under the formation of the salts of the alkane sulfonic acid and phenol. The reaction rate increases with ... Ph esters might undergo a transesterification under the formation of alkane sulfonic acid alkyl esters and phenol, whereas the ... As the focus of the study was to investigate the recovery of sulfonic acid, C10-21-alkane, Ph esters under the conditions of a ... The hydrolysis of esters is catalyzed by acids as well as bases, whereas the catalytic effect of bases is generally stronger ( ...
... by weight of at least one monoethylenically unsaturated C.sub.3-C.sub.8-carboxylic acid or of an anhydride or ... The sulfo groups are introduced by amidation with an amino-C.sub.1-C.sub.2-alkanesulfonic acid. WO 2005/042684 describes the ... ethacrylic acid, vinylacetic acid, allylacetic acid, crotonic acid, maleic acid, fumaric acid, mesaconic acid and itaconic acid ... such as maleic acid, maleic anhydride, acrylic acid, methacrylic acid, fumaric acid, itaconic acid and citraconic acid with at ...
The sodium alkylsulfonate is a sodium salt of an alkane sulfonic acid of linear paraffins having chain lengths of from 10 to 18 ... methacrylic acid, acrylic acid esters, methacrylic acid esters, nitriles and amides. ... However, from the viewpoints of availability and the like, acrylic acid, methacrylic acid and their esters, nitriles and amides ... sodium salts of alkyl sulfonic acid esters, sodium salts of sulfosuccinic acid alkyl esters, sodium alkylsulfonate, sodium ...
C10-C21-Alkane sulfonic acid phenyl esters (No.180), chloroalkane sulfonic acids, sodium salts (No.181), 2-phosphono-1,2,4- ... Anthranilic acid This report is a translation of a report finalized in German in October 1995. Topics: 2-aminobenzoic acid; ... butanetricarboxylic acid (PBTC) (No.182), diprogulic acid (and its sodium salt) (No.183) These reports are translations of ... Main conclusions: no epidemiologic data are available on the effects of fatty alkyl sulfates (sulfuric acid esters) in humans; ...
Contains modified polyacrylic acid salt, sodium tripolyphosphate, sodium hydroxide, sodium silicate, sodium hypochlorite sodium ... The C13-18 n-alkane sulfonic acid and salts thereof is a well known surfactant detergent, available commercially as Hostapur ... The modified polyacrylic acid salt and the polyacrylic acid salt act as suspending aids to keep the water softener (sodium ... Water 50.6-80.2Allyl sucrose modified polyacrylic acid made by co-polymerizing about 98-99.5 parts by weight of acrylic acid ...
G) Bicyclo[2.2.1] alkane-1-alkanesulfonic acid, 7,7-dimethyl-2-oxo-, [(3,5-dimethoxy-2- naphthalenyl) carbonyl] methylazanyl ... G) Carbomonocyclic dicarboxylic acid, polymer with carbomonocyclic dicarboxylic acid, alkanedioic acid, alkenedioic acid, ... G) Mix fatty acids compd with amine (1:1).. P-17-0156. 7/27/2017. 10/25/2017. CBI. (G) Coating. (G) Mix fatty acids, compd with ... adipic acid, isophthalic acid, terephthalic acid, 2-oxooxopane, bayflex 2002h and 1,1′-methylenebis[isocyanatobenzene].. ...
... acetic acid, fluoroboric acid, alkanesulfonic acids such as methanesulfonic acid, ethanesulfonic acid, propanesulfonic acid and ... hydrochloric acid, hydrobromic acid, perchloric acid, nitric acid, chromic acid and phosphoric acid. Mixtures of acids may be ... Preferred acids include sulfuric acid, methanesulfonic acid, ethanesulfonic acid, propanesulfonic acid, hydrochloric acid and ... trifluoromethane sulfonic acid, aryl sulfonic acids such as benzenesulfonic acid, p-toluenesulfonic acid, sulfamic acid, ...
... sulfonic acids such as alkanesulfonic acids and arylsulfonic acids, phosphonic acids such as alkylphosphonic acids and ... malonic acid, succinic acid, glutaric acid, adipic acid, glycolic acid, lactic acid, tartaric acid, citric acid or malic acid, ... and substituted arylcarboxylic acids. Preferred organic acids include formic acid, acetic acid, propionic acid, oxalic acid, ... ethylenediamine tetraacetic acid, phthalic acid, benzene tricarboxylic acid, salicilic acid, cyclohexanecarboxylic acid, 1,4- ...
  • They are commonly cited as being around a million times stronger than the corresponding carboxylic acid. (wikipedia.org)
  • Replacement of phenol with carboxylic acid for transparency and aqueous base development resulted in swelling. (spie.org)
  • Hexafluoroalcohol was introduced to replace carboxylic acid and became employed ubiquitously in 157 nm resists, for transparency and base development. (spie.org)
  • Stabilized Liquid Enzyme Composition - The present invention relates to a liquid composition comprising an enzyme and an enzyme stabilizer such as an aryl carboxylic acid. (patentsencyclopedia.com)
  • A structural feature of the compounds of formula I is the presence of the C-terminal carboxylic acid functionality, which was shown to be responsible not only for the potency and reversibility observed for this inhibitor series, but also for the excellent specificity for HCV protease compared to other serine/cysteine proteases. (allindianpatents.com)
  • Oxidation of a primary alcohol with chromic acid yields a carboxylic acid as the organic product via the corresponding aldehyde . (ochempal.org)
  • If one molar equivalent of chromic acid is used, some aldehyde and some carboxylic acid are obtained as organic products, and, since there are not enough chromic acid molecules to react with all the alcohol molecules, some unreacted alcohol is recovered. (ochempal.org)
  • It reacts with water to give a gem diol that is oxidized by chromic acid to the carboxylic acid. (ochempal.org)
  • The key to preventing the oxidation of the aldehyde to the carboxylic acid is to exclude water from the system, thereby preventing the conversion of aldehyde to the gem diol, which is not possible when chromic acid is the oxidizing agent because, to generate chromic acid, water is required. (ochempal.org)
  • belongs to the class of organic compounds known as trihydroxy bile acids, alcohols and derivatives. (hmdb.ca)
  • These are bile acid derivatives containing a taurine conjugated to the bile acid moiety. (hmdb.ca)
  • Although both alkyl and aryl sulfonic acids are known, most of the applications are associated with the aromatic derivatives. (wikipedia.org)
  • Sulfonic acid derivatives that are substituted with an aliphatic hydrocarbon group. (bvsalud.org)
  • EC 1.6.99.5 (NADH dehydrogenase (quinone)) requires NADH, is inhibited by AMP and 2,4-dinitrophenol but not by dicoumarol or folic acid derivatives. (healthmatics.info)
  • EC 1.6.99.6 (NADPH dehydrogenase (quinone)) requires NADPH and is inhibited by dicoumarol and folic acid derivatives but not by 2,4-dinitrophenol. (healthmatics.info)
  • Automatic or Machine Dishwashing Compositions of Sulfonated Estolides and Other Derivatives of Fatty Acids and Uses Thereof - Sulfo-estolides and methods of making them are described. (patentsencyclopedia.com)
  • The invention relates to novel preparation processes for the preparation of 3,5-dihydroxyheptanoic acid derivatives and to novel intermediates and processes for their preparation. (justia.com)
  • The dihydroxyheptanoic acid derivatives and the intermediates are suitable for advantageous syntheses of statins. (justia.com)
  • Methanesulfonic anhydride is the acid anhydride of methanesulfonic acid. (wikipedia.org)
  • It is commercially available but may also be prepared by the reaction of phosphorus pentoxide with methanesulfonic acid at 80 °C. P2O5 + 6 CH3SO3H → 3 (CH3SO2)2O + 2 H3PO4 Disulfuric acid Sodium pyrosulfate Acetic anhydride Trifluoromethanesulfonic anhydride Wachtmeister, C. A. (wikipedia.org)
  • Ball-and-stick model of methanesulfonic acid. (wikipedia.org)
  • [1] Direct sulfonation also converts methanesulfonic acid to methanedisulfonic acid . (wikipedia.org)
  • For example, p -Toluenesulfonic acid and methanesulfonic acid have p K a values of −2.8 and −1.9, respectively, while those of benzoic acid and acetic acid are 4.20 and 4.76, respectively. (wikipedia.org)
  • For instance, various sources have reported the p K a of methanesulfonic acid to be as high as −0.6 [4] or as low as −6.5. (wikipedia.org)
  • The structure of sulfonic acids is illustrated by the prototype, methanesulfonic acid . (wikipedia.org)
  • Methanesulfonic acid is a raw material for medicine and pesticide. (lookchem.com)
  • Methanesulfonic acid is a caustic chemical, briefly referred to as MSA. (lookchem.com)
  • 2. The method as claimed in claim 1, wherein the alkanesulfonic acid is selected from the group consisting of methanesulfonic acid, ethanesulfonic acid, n-propanesulfonic acid, isopropanesulfonic acid, n-butanesulfonic acid, isobutanesulfonicacid, sec-butanesulfonic acid, tert-butanesulfonic acid, and the mixtures of two or more of them in all proportions. (patentgenius.com)
  • 3. The method as claimed in claim 1, wherein the alkanesulfonic acid is methanesulfonic acid or ethanesulfonic acid. (patentgenius.com)
  • Perfluorohexanesulfonic acid including its salts and related compounds was proposed for inclusion in the Stockholm Convention. (wikipedia.org)
  • [2] Salts or esters of sulfonic acids are called sulfonates . (wikipedia.org)
  • Hydrolysis under alkaline conditions (saponification) will take place under the formation of the salts of the alkane sulfonic acid and phenol. (europa.eu)
  • 4. The vinylidene chloride copolymer latex of claim 1 wherein the anionic surfactant is selected from the group consisting of sodium alkylbenzenesulfonate, sodium salts of alkyl sulfonic acid esters, sodium salts of sulfosuccinic acid alkyl esters, sodium alkylsulfonate, sodium alkyldiphenylether sulfonate, and sulfuric acid esters of alkylphenolpolyethylene oxide. (google.com)
  • The invention also relates to a process for purifying glycerol obtained as a by-product of triglyceride transesterification during the preparation of fatty acids, fatty esters and/or fatty acid salts, and also to a combined process for preparing, on the one hand, fatty acids, fatty esters and/or fatty acid salts and, on the other hand, glycerol, from triglycerides, using at least one sulfonic acid. (patentsencyclopedia.com)
  • More specifically, the present invention relates to a process for purifying glycerol obtained as a by-product of triglyceride transesterification during the preparation of fatty acids, of fatty esters and/or of fatty acid salts. (patentsencyclopedia.com)
  • The alkyl sulfonic acids and their tin and lead salts are known compounds and can be readily prepared by those skilled in the art and as disclosed in U.S. Pat. (justia.com)
  • The compounds of formula I are zwitterionic and are capable of forming salts with strong acids and bases. (allindianpatents.com)
  • 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)
  • Many sulfonic acids are prepared by hydrolysis of sulfonyl halides and related precursors. (wikipedia.org)
  • Thus, perfluorooctanesulfonic acid is prepared by hydrolysis of the sulfonyl fluoride, which in turn is generated by the electrofluorination of octanesulfonic acid. (wikipedia.org)
  • Similarly the sulfonyl chloride derived from polyethylene is hydrolyzed to the sulfonic acid. (wikipedia.org)
  • Perfluorosulfonic acids are organofluoroanalogues of conventional alkanesulfonic acids, but they are several pKA units stronger (and are therefore strong acids). (wikipedia.org)
  • Sulfonic acids are strong acids. (wikipedia.org)
  • In the presence of ethanol, sulfonic acids, C10-21 alkane, Ph esters might undergo a transesterification under the formation of alkane sulfonic acid alkyl esters and phenol, whereas the corresponding ethyl esters are less stable with respect to hydrolysis compared to the phenyl esters. (europa.eu)
  • A catalytic amount of a water-stable Br nsted acidic ionic liquid with an alkane sulfonic acid catalyzed a mild and chemoselective thioacetalization of various aldehydes to afford 1,3-dithianes in very good yield and short reaction times. (organic-chemistry.org)
  • 1. Use of at least one sulfonic acid, preferably at least one alkane sulfonic acid, for recovering glycerol resulting from a reaction crude from transesterification of glycerides, in particular of triglycerides of vegetable and/or animal origin. (patentsencyclopedia.com)
  • Use of Alkane Sulfonic Acid For Descaling In the Agri-Food Industry - The present invention relates to the use of alkane sulfonic acid for descaling, and more generally for cleaning vats, casks, and other containers used for the storage, shipping, and handling of meat and early produce, particularly poultry, fruit, and vegetables. (patentsencyclopedia.com)
  • The present invention also relates to a composition in gel form including at least one alkane sulfonic acid. (patentsencyclopedia.com)
  • 5. The vinylidene chloride copolymer latex of claim 1 wherein the nonionic surfactant is selected from the group consisting of alkyl ethers, alkylphenol ethers and higher fatty acid esters of polyethylene oxide. (google.com)
  • Hydrolysis in an acidic environment leads to an equilibrium mixture containing the ester, alcohol as well as the free sulfonic acid, whereas a complete hydrolysis of the ester solely occurs if the formed alcohol is removed from the mixture. (europa.eu)
  • 6. The vinylidene chloride copolymer latex of claim 1 wherein the nonionic surfactant is a fatty acid ester of polyethylene oxide having an average number of ethylene oxide repeat units of from 15 to 40. (google.com)
  • 12 . The element of claim 11 wherein said anionic dispersant is sodium dodecylbenzenesulfonate, sodium dodecylsulfate, the sodium salt of N-oleyl-N-methyltaurine, or the dioctyl ester of sodium sulfosuccinic acid. (google.com.au)
  • This compound belongs to the class of organic compounds known as organosulfonic acids. (hmdb.ca)
  • The present study investigated the stability of sulfonic acid, C10-21-alkane, Ph esters in aqueous media recovering more than 80 % of representative constituents after a duration of 240 h. (europa.eu)
  • Sulfonic acid, C10-21-alkane, Ph esters are stable under the applied test conditions. (europa.eu)
  • As the focus of the study was to investigate the recovery of sulfonic acid, C10-21-alkane, Ph esters under the conditions of a migration test, the aqueous phase consists of food simulating solvent consisting of 10 % (v/v) ethanol dissolved in water. (europa.eu)
  • The hydrolysis of esters is catalyzed by acids as well as bases, whereas the catalytic effect of bases is generally stronger (Riemscheider & Hermann, 2005). (europa.eu)
  • Furthermore, the reaction rate in dilute acids is generally fairly low, partly based on the poor solubility of the esters in water. (europa.eu)
  • Concluding, it can be assumed that sulfonic acid, C10-21-alkane, Ph esters can hydrolyze under acidic conditions but the reaction is assumed to be slow and thus not relevant under environmental and physiological conditions. (europa.eu)
  • Furthermore, the great resistance against saponification is one main feature of sulfonic acid, C10-21-alkane, Ph esters as compared to common softeners (Product information, Lanxess) supporting the assumption that the saponification reaction solely gains in importance at very high pH values normally not occurring in natural systems. (europa.eu)
  • 3. The vinylidene chloride copolymer latex of claim 2 wherein the ethylenically unsaturated monomer is selected from the group consisting of acrylic acid, methacrylic acid, acrylic acid esters, methacrylic acid esters, nitriles and amides. (google.com)
  • These are compounds containing the sulfonic acid group, which has the general structure RS(=O)2OH (R is not a hydrogen atom). (hmdb.ca)
  • Perfluorosulfonic acids (PFSAs) are chemical compounds of the formula CnF(2n+1)SO3H and thus belong to the family of perfluorinated and polyfluorinated alkyl compounds (PFASs). (wikipedia.org)
  • 1,3-Dithianes and 1,3-dithiolanes can easily be prepared from carbonyl compounds with 1,3-propanedithiol or 1,2-ethanedithiol in the presence of a Br nsted or a Lewis acid catalyst. (organic-chemistry.org)
  • A Lewis acid-surfactant-combined copper bis(dodecyl sulfate) [Cu(DS) 2 ] catalyst served as an efficient and reusable catalyst for the thioacetalization and transthioacetalization of carbonyl compounds and O,O -acetals in water at room temperature. (organic-chemistry.org)
  • The tin and lead compounds useable are those which are soluble in the alkyl sulfonic acid and which will form an alkyl sulfonic acid salt. (justia.com)
  • Hydrolysis of taurocholic acid yields taurine, a nonessential amino acid. (hmdb.ca)
  • Amino Acids. (harvard.edu)
  • A non-essential amino acid that occurs in high levels in its free state in plasma. (healthmatics.info)
  • Amino acid with side chain -CH3. (healthmatics.info)
  • A small non-essential amino acid in humans, Alanine is one of the most widely used for protein construction and is involved in the metabolism of tryptophan and vitamin pyridoxine. (healthmatics.info)
  • The nitrogen-containing compound is a salt of an amino group-containing triazine compound with an oxygen acid, a salt of an amino group-containing triazine compound with a hydroxyl group-containing triazine compound, a polyphosphoric acid amide, a cyclic urea compound, or others. (patents.com)
  • Thiosulfonic Acids" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (umassmed.edu)
  • OSHA recommends nitrile gloves as part of their Personal Protective Equipment Standard (1910.132) because of their ability to provide protection from many chemicals, including oils, greases, acids, caustics, and alcohols. (cookinghaven.com)
  • PCC can also be used as an alternative to cromic acid in the oxidation of secondary alcohols to ketones . (ochempal.org)
  • The sulfonic acid group, RSO 2 OH features a tetrahedral sulfur centre, meaning that sulfur is at the center of four atoms: three oxygens and one carbon. (wikipedia.org)
  • Vinylsulfonic acid is derived by hydrolysis of carbyl sulfate , (C 2 H 4( SO 3 ) 2 ), which in turn is obtain by the addition of sulfur trioxide to ethylene . (wikipedia.org)
  • Useful methods include acid side bleaching, partial hydrogenation of the fatty acid, pretreatment of the fatty acid to provide color inhibition, acid side hydrolysis of the sulfo-estolides, or conversion of SHP to an essentially fully hydrolyzed product (HSHP) or a partially hydrolyzed product (PHSHP). (patentsencyclopedia.com)
  • Let us now consider lactic acid. (ochempal.org)
  • The lactic acid molecule has one chiral center. (ochempal.org)
  • Therefore, a Fischer projection representing either enantiomer of lactic acid has the following bond skeleton around the chiral center. (ochempal.org)
  • Some of these 24 Fischer projections represent ( R )-lactic acid and others ( S )-lactic acid. (ochempal.org)
  • The mirror image of a Fischer projection representing ( R )-lactic acid represents ( S )-lactic acid and vice versa, implying that twelve of the 24 Fischer projections represent ( R )-lactic acid and the other twelve ( S )-lactic acid. (ochempal.org)
  • Thus, the maximum number of Fischer projections that can be drawn to represent ( R )-lactic acid is twelve. (ochempal.org)
  • 2. Use the following stepwise procedure to generate the twelve Fischer projections that represent ( R )-lactic acid. (ochempal.org)
  • Taurocholic acid is a bile acid and is the product of the conjugation of cholic acid with taurine. (hmdb.ca)
  • Bile acids are steroid acids found predominantly in the bile of mammals. (hmdb.ca)
  • The distinction between different bile acids is minute, depending only on the presence or absence of hydroxyl groups on positions 3, 7, and 12. (hmdb.ca)
  • Bile acids are physiological detergents that facilitate excretion, absorption, and transport of fats and sterols in the intestine and liver. (hmdb.ca)
  • Bile acids are also steroidal amphipathic molecules derived from the catabolism of cholesterol. (hmdb.ca)
  • Bile acids recirculate through the liver, bile ducts, small intestine, and portal vein to form an enterohepatic circuit. (hmdb.ca)
  • The unique detergent properties of bile acids are essential for the digestion and intestinal absorption of hydrophobic nutrients. (hmdb.ca)
  • Taurocholic acid, as with all bile acids, acts as a detergent to solubilize fats for absorption and is itself absorbed. (hmdb.ca)
  • Taurocholic acid is one of the main components of urinary nonsulfated bile acids in biliary atresia. (hmdb.ca)
  • These are prenol lipids structurally characterized by a bile acid or alcohol which bears three hydroxyl groups. (hmdb.ca)
  • Tauroursodeoxycholic acid is a bile acid also known as TUDCA formed in the liver by conjugation of deoxycholate with taurine, usually as the sodium salt. (hmdb.ca)
  • It is present in milk but is isolated mostly from ox bile and strongly conjugates bile acids. (harvard.edu)
  • Taurine , a bile acid , and one of the few naturally occurring sulfonic acids (shown in uncommon tautomer ). (wikipedia.org)
  • 2. The rinse of claim 1, wherein said water-soluble polymer is selected from the group consisting of N-vinylpyrrolidone homopolymers, copolymers of N-vinylpyrrolidone with another vinyl monomer, polyvinyl alcohol, copolymers of vinyl alcohol with another vinyl monomer, poly(meth)acrylic acids, and polysaccharides. (freepatentsonline.com)
  • Their polarity, in conjunction with their high acidity, renders short-chain sulfonic acids water-soluble, while longer-chain ones exhibit detergent-like properties. (wikipedia.org)
  • The alkyl sulfonic acids useful according to the invention are those which are water soluble or soluble in the bath. (justia.com)
  • A sulfonic acid can be thought of as sulfuric acid with one hydroxyl group replaced by an organic substituent . (wikipedia.org)
  • The overall geometry of the sulfur centre is reminiscent of the shape of sulfuric acid . (wikipedia.org)
  • Inorganic or organic oxy acids of sulfur which contain the general formula RS2O2H. (umassmed.edu)
  • 4. The rinse of claim 3, wherein said surfactant comprises a fluoroalkanesulfonic acid derivative or alkanesulfonic acid derivative. (freepatentsonline.com)
  • 4. Use according to claim 1, in which said at least one sulfonic acid is methane sulfonic acid (CH 3 SO 3 H). (patentsencyclopedia.com)
  • 8. Process according to claim 7, in which the at least one sulfonic acid is methane sulfonic acid. (patentsencyclopedia.com)
  • 10. Process according to claim 9, in which said at least one sulfonic acid of step 4b is methane sulfonic acid. (patentsencyclopedia.com)
  • The results showed that the highest PFASs concentrations were found in tap water samples and the more frequently found compound was perfluorooctanesulfonic acid (PFOS), with mean concentrations of 7.73, 15.33 and 15.83ng/l in French, Spanish and Brazilian samples, respectively. (nih.gov)
  • 2. Use according to claim 1, in which said at least one sulfonic acid corresponds to the general formula R--SO 3 H, where R represents an alkyl or aryl radical, preferably an alkyl radical. (patentsencyclopedia.com)
  • The present invention relates to the use of at least one alkane sulphonic acid, with formula R--SO.sub.3H, where R represents a saturated, linear or branched hydrocarbon chain, comprising 1 to 4 atoms of carbon for removing rust from all types of surface, in particular from metal surfaces, specifically iron, steel and others. (patentgenius.com)
  • The invention also relates to a method for cleaning rust from all types of surfaces using at least one alkane sulphonic acid. (patentgenius.com)
  • The time-honored method for plating tin-lead alloys, commonly called Solder Plate, is to have these two metals present in solution as fluoborates with an excess of fluoboric acid and boric acid. (justia.com)
  • Perfluorooctanesulfonic acid, for example, has been used in hard chromium plating. (wikipedia.org)
  • Perfluorooctanesulfonic acid was included in Annex B of the Stockholm Convention in 2009 and subsequently in the EU POPs Regulation. (wikipedia.org)
  • Perfluorosulfonic acids with six or more perfluorinated carbon atoms, i.e. from perfluorohexanesulfonic acid onwards, are referred to as long-chain. (wikipedia.org)
  • 12. A method of removing rust from a surface, which comprises contacting the rust with a composition that consists essentially of an amount of at least one alkanesulfonic acid of formula R--SO3H, wherein R represents a saturated and linear orbranched hydrocarbon chain comprising from 1 to 4 carbon atoms. (patentgenius.com)
  • 3. Use according to claim 1, in which said at least one sulfonic acid corresponds to the general formula R--SO 3 H, where R represents a linear or branched, saturated hydrocarbon-based chain containing from 1 to 4 carbon atoms. (patentsencyclopedia.com)
  • Alkane or alkyl sulfonic acids containing 1 to 5 carbon atoms in the alkyl group have previously been used in electrolytic plating baths. (justia.com)
  • The lower alkyl sulfonic acids containing 1-5 carbon atoms are thus most advantageous, particularly methane or methyl sulfonic acid. (justia.com)
  • The simplest example of a perfluorosulfonic acid is the trifluoromethanesulfonic acid. (wikipedia.org)
  • The CBR43 could effectively decolorize high concentrations of acid blue 62 and acid black 172 (500-700 mg L ). The maximum dye decolorization rate was obtained at 28 C, pH 5, and 150 rpm in the PDB medium. (bireme.br)
  • EP-A-0 277 002 discloses in Scheme I the oxidation of several steroids with ruthenium dioxide/sodium periodate in an organic solvent leading to the corresponding acid. (allindianpatents.com)
  • To investigate the effects of fish oil on the oxidation resistance of VLDL and LDL in HTG patients, nine male patients received 1 g/d fish oil (containing 55.7% n-3 polyunsaturated fatty acids [PUFAs] and 1 U α-tocopherol/g fish oil) for 6 weeks followed by 5 g/d fish oil for an additional 6 weeks. (tudelft.nl)
  • The oxidation of the aldehyde can not be prevented by using one molar equivalent of chromic acid. (ochempal.org)
  • 5. Use according to claim 1, in which said at least one sulfonic acid is in anhydrous form or in the form of an aqueous solution comprising from 5% to 90% by weight, in particular from 10% to 80% by weight of sulfonic acid, and more particularly from 15% to 75% by weight, the rest to 100% consisting of water. (patentsencyclopedia.com)
  • The parent compound (with the organic substituent replaced by hydrogen) is the parent sulfonic acid, HS(=O) 2 (OH), a tautomer of sulfurous acid , S(=O)(OH) 2 . (wikipedia.org)
  • [5] Sulfonic acids are known to react with solid sodium chloride ( salt ) to form the sodium sulfonate and hydrogen chloride. (wikipedia.org)
  • The investigation about vibrational spectrum of cycle dimers in crystal with carboxyl groups from each molecule of acid was shown that it leads to create Hydrogen bonds for adjacent molecules. (sciencepubco.com)
  • Traditionally, soaps are the popular surfactants, being derived from fatty acids . (wikipedia.org)