Arsenates: Inorganic or organic salts and esters of arsenic acid.Arsenate Reductases: Oxidoreductases that specifically reduce arsenate ion to arsenite ion. Reduction of arsenate is a critical step for its biotransformation into a form that can be transported by ARSENITE TRANSPORTING ATPASES or complexed by specific sulfhydryl-containing proteins for the purpose of detoxification (METABOLIC DETOXIFICATION, DRUG). Arsenate reductases require reducing equivalents such as GLUTAREDOXIN or AZURIN.Ion Pumps: A general class of integral membrane proteins that transport ions across a membrane against an electrochemical gradient.Arsenite Transporting ATPases: Efflux pumps that use the energy of ATP hydrolysis to pump arsenite across a membrane. They are primarily found in prokaryotic organisms, where they play a role in protection against excess intracellular levels of arsenite ions.Arsenic: A shiny gray element with atomic symbol As, atomic number 33, and atomic weight 75. It occurs throughout the universe, mostly in the form of metallic arsenides. Most forms are toxic. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), arsenic and certain arsenic compounds have been listed as known carcinogens. (From Merck Index, 11th ed)Arsenites: Inorganic salts or organic esters of arsenious acid.Pteris: A plant genus of the family PTERIDACEAE. Members contain entkaurane DITERPENES. The name is similar to bracken fern (PTERIDIUM).Phosphates: Inorganic salts of phosphoric acid.Arsenicals: Inorganic or organic compounds that contain arsenic.Cacodylic Acid: An arsenical that has been used as a dermatologic agent and as an herbicide.Antimony: A metallic element that has the atomic symbol Sb, atomic number 51, and atomic weight 121.75. It is used as a metal alloy and as medicinal and poisonous salts. It is toxic and an irritant to the skin and the mucous membranes.Halomonadaceae: A family of gram-negative, moderately halophilic bacteria in the order Oceanospirillales. Members of the family have been isolated from temperate and Antarctic saline lakes, solar salt facilities, saline soils, and marine environments.Multienzyme Complexes: Systems of enzymes which function sequentially by catalyzing consecutive reactions linked by common metabolic intermediates. They may involve simply a transfer of water molecules or hydrogen atoms and may be associated with large supramolecular structures such as MITOCHONDRIA or RIBOSOMES.Shewanella: A genus of gram-negative, facultatively anaerobic rods. It is a saprophytic, marine organism which is often isolated from spoiling fish.Crambe Plant: A plant genus of the family BRASSICACEAE. Members contain crambin.Aquaglyceroporins: A subgroup of aquaporins that transport WATER; GLYCEROL; and other small solutes across CELL MEMBRANES.Arsenic Poisoning: Disorders associated with acute or chronic exposure to compounds containing ARSENIC (ARSENICALS) which may be fatal. Acute oral ingestion is associated with gastrointestinal symptoms and an encephalopathy which may manifest as SEIZURES, mental status changes, and COMA. Chronic exposure is associated with mucosal irritation, desquamating rash, myalgias, peripheral neuropathy, and white transverse (Mees) lines in the fingernails. (Adams et al., Principles of Neurology, 6th ed, p1212)Comamonas: A genus of gram-negative, straight or slightly curved rods which are motile by polar flagella and which accumulate poly-beta-hydroxybutyrate within the cells.Antimony Potassium Tartrate: A schistosomicide possibly useful against other parasites. It has irritant emetic properties and may cause lethal cardiac toxicity among other adverse effects.Desulfovibrio desulfuricans: The type species of gram-negative, anaerobic bacteria of the genus DESULFOVIBRIO. It is found in FRESHWATER; SOIL, and in marine or brackish water.Phosphate Transport Proteins: Membrane proteins that are involved in the active transport of phosphate.IndiaFraud: Exploitation through misrepresentation of the facts or concealment of the purposes of the exploiter.Counterfeit Drugs: Drugs manufactured and sold with the intent to misrepresent its origin, authenticity, chemical composition, and or efficacy. Counterfeit drugs may contain inappropriate quantities of ingredients not listed on the label or package. In order to further deceive the consumer, the packaging, container, or labeling, may be inaccurate, incorrect, or fake.Sodium: A member of the alkali group of metals. It has the atomic symbol Na, atomic number 11, and atomic weight 23.Teratogens: An agent that causes the production of physical defects in the developing embryo.Toxicity Tests: An array of tests used to determine the toxicity of a substance to living systems. These include tests on clinical drugs, foods, and environmental pollutants.Drosophila: A genus of small, two-winged flies containing approximately 900 described species. These organisms are the most extensively studied of all genera from the standpoint of genetics and cytology.S-Adenosylhomocysteine: 5'-S-(3-Amino-3-carboxypropyl)-5'-thioadenosine. Formed from S-adenosylmethionine after transmethylation reactions.Drosophila Proteins: Proteins that originate from insect species belonging to the genus DROSOPHILA. The proteins from the most intensely studied species of Drosophila, DROSOPHILA MELANOGASTER, are the subject of much interest in the area of MORPHOGENESIS and development.Moles: Any of numerous burrowing mammals found in temperate regions and having minute eyes often covered with skin.Magnetometry: The measurement of various aspects of MAGNETIC FIELDS.Acceleration: An increase in the rate of speed.Accelerometry: Qualitative and quantitative measurement of MOVEMENT patterns.Directories as Topic: Lists of persons or organizations, systematically arranged, usually in alphabetic or classed order, giving address, affiliations, etc., for individuals, and giving address, officers, functions, and similar data for organizations. (ALA Glossary of Library and Information Science, 1983)Quaternary Ammonium Compounds: Derivatives of ammonium compounds, NH4+ Y-, in which all four of the hydrogens bonded to nitrogen have been replaced with hydrocarbyl groups. These are distinguished from IMINES which are RN=CR2.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).Kinetics: The rate dynamics in chemical or physical systems.Electron Transport: The process by which ELECTRONS are transported from a reduced substrate to molecular OXYGEN. (From Bennington, Saunders Dictionary and Encyclopedia of Laboratory Medicine and Technology, 1984, p270)Eosine Yellowish-(YS): A versatile red dye used in cosmetics, pharmaceuticals, textiles, etc., and as tissue stain, vital stain, and counterstain with HEMATOXYLIN. It is also used in special culture media.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.Nanoparticles: Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materials; NANOCAPSULES; METAL NANOPARTICLES; DENDRIMERS, and QUANTUM DOTS. The uses of nanoparticles include DRUG DELIVERY SYSTEMS and cancer targeting and imaging.Chemical Hazard Release: Uncontrolled release of a chemical from its containment that either threatens to, or does, cause exposure to a chemical hazard. Such an incident may occur accidentally or deliberately.Adsorption: The adhesion of gases, liquids, or dissolved solids onto a surface. It includes adsorptive phenomena of bacteria and viruses onto surfaces as well. ABSORPTION into the substance may follow but not necessarily.Cocos: A plant genus of the family ARECACEAE. It is a tropical palm tree that yields a large, edible hard-shelled fruit from which oil and fiber are also obtained.Water Purification: Any of several processes in which undesirable impurities in water are removed or neutralized; for example, chlorination, filtration, primary treatment, ion exchange, and distillation. It includes treatment of WASTE WATER to provide potable and hygienic water in a controlled or closed environment as well as provision of public drinking water supplies.Colloids: Two-phase systems in which one is uniformly dispersed in another as particles small enough so they cannot be filtered or will not settle out. The dispersing or continuous phase or medium envelops the particles of the discontinuous phase. All three states of matter can form colloids among each other.Acinetobacter Infections: Infections with bacteria of the genus ACINETOBACTER.Acinetobacter baumannii: A species of gram-negative, aerobic bacteria, commonly found in the clinical laboratory, and frequently resistant to common antibiotics.Anabaena variabilis: A species of ANABAENA that can form SPORES called akinetes.Quantitative Structure-Activity Relationship: A quantitative prediction of the biological, ecotoxicological or pharmaceutical activity of a molecule. It is based upon structure and activity information gathered from a series of similar compounds.Polyanhydrides: Anhydride polymers with a repeating structure of RC(=O)OC(=O)R. They readily hydrolyze in water making them useful for DELAYED-ACTION PREPARATIONS.Nonlinear Dynamics: The study of systems which respond disproportionately (nonlinearly) to initial conditions or perturbing stimuli. Nonlinear systems may exhibit "chaos" which is classically characterized as sensitive dependence on initial conditions. Chaotic systems, while distinguished from more ordered periodic systems, are not random. When their behavior over time is appropriately displayed (in "phase space"), constraints are evident which are described by "strange attractors". Phase space representations of chaotic systems, or strange attractors, usually reveal fractal (FRACTALS) self-similarity across time scales. Natural, including biological, systems often display nonlinear dynamics and chaos.Potassium: An element in the alkali group of metals with an atomic symbol K, atomic number 19, and atomic weight 39.10. It is the chief cation in the intracellular fluid of muscle and other cells. Potassium ion is a strong electrolyte that plays a significant role in the regulation of fluid volume and maintenance of the WATER-ELECTROLYTE BALANCE.Microtechnology: Manufacturing technology for making microscopic devices in the micrometer range (typically 1-100 micrometers), such as integrated circuits or MEMS. The process usually involves replication and parallel fabrication of hundreds or millions of identical structures using various thin film deposition techniques and carried out in environmentally-controlled clean rooms.Crystallography, X-Ray: The study of crystal structure using X-RAY DIFFRACTION techniques. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

Probing the function of the conserved tryptophan in the flexible loop of the Yersinia protein-tyrosine phosphatase. (1/405)

The involvement of the strictly conserved Trp354 residue in the catalysis of the Yersinia protein tyrosine phosphatase (PTPase) has been investigated by site-directed mutagenesis and kinetic studies. Crystallographic structural data have revealed that Trp354 interacts with the active site Arg409 and is located at one of the hinge positions of the flexible surface loop (WpD loop) which also harbors the general acid/base (Asp356) essential for catalysis [Schubert, H. L., Fauman, E. B., Stuckey, J. A., Dixon, J. E. & Saper, M. A. (1995) Protein Sci. 4, 1904-1913]. Two mutants were constructed and expressed that contained the Trp354-->Phe and Trp354-->Ala substitutions. The K(m) of the W354F and W354A mutants were not significantly different from that of the wild-type. However, a major decrease in the affinity for oxyanions was observed for the mutants, which is consistent with Trp354 playing a role in aligning Arg409 for oxyanion binding. In addition replacement of Trp354 with Phe or Ala caused a decrease in kcat of 200-fold and 480-fold, respectively, and impaired the ability of the mutant enzymes to stabilize the negative charge in the leaving group at the transition state. In fact, the W354F and W354A mutants exhibited catalytic efficiency and leaving group dependency similar to those observed for the general acid-deficient PTPase D356N. These results indicate that Trp354 is an important residue that keeps the WpD loop in a catalytically competent conformation and positions the general acid/base Asp356 in the correct orientation for proton transfer.  (+info)

Sulfurospirillum barnesii sp. nov. and Sulfurospirillum arsenophilum sp. nov., new members of the Sulfurospirillum clade of the epsilon Proteobacteria. (2/405)

Two strains of dissimilatory arsenate-reducing vibrio-shaped bacteria are assigned to the genus Sulfurospirillum. These two new species, Sulfurospirillum barnesii strain SES-3T and Sulfurospirillum arsenophilum strain MIT-13T, in addition to Sulfurospirillum sp. SM-5, two strains of Sulfurospirillum deleyianum, and Sulfurospirillum arcachonense, form a distinct clade within the epsilon subclass of the Proteobacteria based on 16S rRNA analysis.  (+info)

Enhanced transcription factor DNA binding and gene expression induced by arsenite or arsenate in renal slices. (3/405)

Although the kidney represents a target for the accumulation and toxicity of arsenic, little is known about the molecular targets of arsenic in this organ. Therefore, these studies were designed to examine the molecular impact of arsenite [As(III)] and arsenate [As(V)] at low (nanomolar) concentrations. Precision-cut rabbit renal cortical slices were challenged with As(III) or As(V) for up to 8 h. Neither form of the metal induced overt cytotoxicity as assessed by intracellular K+ levels over this time period at concentrations from 0.01-10 microM. In addition, no alterations in the expression of Hsp 60, 70, or 90 were observed. However, induction of heme oxygenase-1 (Hsp 32) was seen following a 4-h challenge with As(III), but not with As(V). As(III) and As(V) induced DNA binding of AP-1 at 2- and 4-h exposure; following a 6-h exposure there was no difference. Although no alteration in the DNA binding activity of ATF-2 was induced by As(III) or As(V), both forms enhanced the DNA binding activity of Elk-1. Enhanced DNA binding activity of AP-1 and Elk-1 correlated with increased gene expression of c-fos, but not c-jun, at 2 h. c-myc gene expression was also induced by As(III) and As(V), albeit at a later time point (6 h). These results suggest that acute arsenic challenge, by either As(III) or As(V), is associated with discrete alterations in the activity of signaling pathways and gene expression in renal tissue.  (+info)

N-acetylneuraminic acid transport by Streptococcus oralis strain AR3. (4/405)

Streptococcus oralis has emerged as one of the most important organisms of the viridans streptococcus group in terms of infections and is recognised as an agent of infective endocarditis and, in immunocompromised patients, septicaemia. The mechanisms by which this organism proliferates in vivo are unknown. However, host-derived sialic acids -- including N-acetylneuraminic acid (NeuNAc) which is present in serum and cell-associated glycoproteins -- are a potential source of fermentable carbohydrate for bacterial proliferation, especially for sialidase-producing bacteria, including S. oralis. To further elucidate the role of NeuNAc in supporting growth, this study determined the ability of S. oralis strain AR3 (isolated from a patient with infective endocarditis) to transport NeuNAc and characterised the transport system. The transport of [14C]-labelled NeuNAc into S. oralis was monitored and this transport system was induced by growth of the bacteria in the presence of the N-acetylated sugars NeuNAc, N-acetylglucosamine and N-acetylmannosamine. The transport system followed typical Michaelis-Menten kinetics, with a Km of 21.0 microM and a Vmax of 2.65 nmoles of NeuNAc transported/min/mg of dry cell mass. NeuNAc transport was inhibited by the presence of exogenous N-glycolylneuraminic acid, a related sialic acid. Chlorhexidine, NaF and 2,4-dinitrophenol were potent inhibitors of the transport system, suggesting that the uptake of NeuNAc occurs via a proton motive force-dependent permease system. This is the first report of the mechanism by which NeuNAc transport occurs in pathogenic streptococci. This transport process may have relevance to the acquisition of a source of fermentable carbohydrate and thus bacterial proliferation in vivo.  (+info)

Sodium arsenate induces overproduction of interleukin-1alpha in murine keratinocytes: role of mitochondria. (5/405)

It has recently been demonstrated that arsenic induces overexpression of keratinocyte-derived growth factors, which are likely to have a significant role in arsenic-induced skin hyperkeratoses and cancer. The mechanism(s) involved in this induction are, however, still elusive. The purpose of this study was to investigate the early intracellular events that follow in vitro treatment with sodium arsenate in a murine keratinocyte cell line (HEL30), which leads to cytokine overproduction. First, we observed that sodium arsenate induced a concentration-dependent production of interleukin-1alpha and a significant increase in cell proliferation, that could be suppressed by the addition of a neutralizing antibody against murine interleukin-1alpha, confirming the ability of arsenic to induce keratinocyte growth-promoting cytokines. Electron microscopic analysis revealed that arsenate induced a dramatic alteration in keratinocyte mitochondria. This effect could be prevented by rotenone pretreatment, which suggests the possible involvement of mitochondria-derived reactive oxygen species. Arsenic induced a concentration- and time-dependent increase in cellular oxidative activity, which was followed by activation of redox-sensitive transcription factors such as nuclear factor-kappaB and activator protein-1, that are essential for interleukin-1alpha synthesis. Prior treatment with rotenone or prolonged treatment with ethidium bromide, an inhibitor of mitochondrial DNA and RNA synthesis, to deplete cells of functional mitochondria, completely prevented sodium arsenate-induced interleukin-1alpha production, this indicates the pivotal role of these organelles in sodium arsenate-induced keratinocyte growth factors.  (+info)

Reactivity of glutaredoxins 1, 2, and 3 from Escherichia coli shows that glutaredoxin 2 is the primary hydrogen donor to ArsC-catalyzed arsenate reduction. (6/405)

In Escherichia coli ArsC catalyzes the reduction of arsenate to arsenite using GSH with glutaredoxin as electron donors. E. coli has three glutaredoxins: 1, 2, and 3, each with a classical -Cys-Pro-Tyr-Cys- active site. Glutaredoxin 2 is the major glutathione disulfide oxidoreductase in E. coli, but its function remains unknown. In this report glutaredoxin 2 is shown to be the most effective hydrogen donor for the reduction of arsenate by ArsC. Analysis of single or double cysteine-to-serine substitutions in the active site of the three glutaredoxins indicated that only the N-terminal cysteine residue is essential for activity. This suggests that, during the catalytic cycle, ArsC forms a mixed disulfide with GSH before being reduced by glutaredoxin to regenerate the active ArsC reductase.  (+info)

Signal transduction pathways regulated by arsenate and arsenite. (7/405)

Arsenate and arsenite activate c-Jun N-terminal kinase (JNK), however, the mechanism by which this occurs is not known. By expressing inhibitory mutant small GTP-binding proteins, p21-activated kinase (PAK) and mitogen-activated protein kinase/extracellular signal-regulated kinase kinase kinases (MEKKs), we have identified specific proteins that are involved in arsenate- and arsenite-mediated activation of JNK. We observe a distinct difference between arsenate and arsenite signaling, which demonstrates that arsenate and arsenite are capable of activating unique proteins. Both arsenate and arsenite activation of JNK requires Rac and Rho. Neither arsenate nor arsenite signaling was inhibited by a dominant-negative mutant of Cdc42 or Ras. Arsenite stimulation of JNK requires PAK, whereas arsenate-mediated activation of JNK was unaffected by inhibitory mutant PAK. Of the four MEKKs tested, only MEKK3 and MEKK4 are involved in arsenate-mediated activation of JNK. In contrast, arsenite-mediated JNK activation requires MEKK2, MEKK3 and MEKK4. These results better define the mechanisms by which arsenate and arsenite activate JNK and demonstrate differences in the regulation of signal transduction pathways by these inorganic arsenic species.  (+info)

Interactions of arsenate, sulfate and phosphate with yeast mitochondria. (8/405)

In the presence of K(+), addition of ATP or ethanol to yeast mitochondria triggers the depletion of the transmembrane potential (DeltaPsi) and this is prevented by millimolar concentrations of phosphate (PO(4)). Different monovalent and polyvalent anions were tested for their protective effects on mitochondria from Saccharomyces cerevisiae. Only arsenate (AsO(4)) and sulfate (SO(4)) were as efficient as PO(4) to protect mitochondria against the K(+) mediated swelling, depletion of the DeltaPsi, and decrease in the ratio of uncoupled state to state 4 respiration rates. Protection by PO(4), SO(4) or AsO(4) was inhibited by mersalyl, suggesting that these anions interact with a site located in the matrix side. In addition, the effects of SO(4) and AsO(4) on the F(1)F(0)-ATPase were tested: both SO(4) and AsO(4) inhibited the synthesis of ATP following competitive kinetics against PO(4) and non-competitive kinetics against ADP. The mersalyl sensitive uptake of (32)PO(4) was not inhibited by SO(4) or AsO(4), suggesting that the synthesis of ATP was inhibited at the F(1)F(0)-ATPase. The hydrolysis of ATP was not inhibited, only a stimulation was observed when AsO(4) or sulfite (SO(3)) were added. It is suggested that the structure and charge similarities of PO(4), AsO(4) and SO(4) result in undiscriminated binding to at least two sites located in the mitochondrial matrix: at one site, occupation by any of these three anions results in protection against uncoupling by K(+); at the second site, in the F(1)F(0)-ATPase, AsO(4) and SO(4) compete for binding against PO(4) leading to inhibition of the synthesis of ATP.  (+info)

*Arsenate

The arsenate ion is AsO3− 4. An arsenate (compound) is any compound that contains this ion. Arsenates are salts or esters of ... Arsenates are moderate oxidizers, with an electrode potential of +0.56 V for reduction to arsenites. Arsenates occur naturally ... The arsenic atom in arsenate has a valency of 5 and is also known as pentavalent arsenic or As(V). Arsenate resembles phosphate ... Unlike phosphates, arsenates are not lost from a mineral during weathering. Examples of arsenate-containing minerals include ...

*Calcium arsenate

... is commonly prepared from disodium hydrogen arsenate and calcium chloride: 2 Na2H[AsO4] + 3 CaCl2 → 4 NaCl + ... Calcium arsenate use is now banned in the UK, and its use is strictly regulated in the United States. It is currently the ... Calcium arsenate is the inorganic compound with the formula Ca3(AsO4)2. A colourless solid, it was originally used as a ... Tartar, H.V.; Wood, L; Hiner, E; A Basic Arsenate of Calcium. J. Am. Chem. Soc. 1924, vol. 46, 809-813. "NIOSH Pocket Guide to ...

*Aluminium arsenate

for Aluminium arsenate of formula AlAsO4.3.5H2O Like gallium arsenate and boron arsenate, it adopts the α-quartz-type structure ... Aluminium arsenate occurs naturally as the mineral mansfieldite. A synthetic hydrate of aluminium arsenate is produced by ... Aluminium arsenate is a inorganic compound with the formula AlAsO4. It is most commonly found as an octahydrate. It is a ... "Solubility-product constant of an amorphous aluminum-arsenate phase (AlAsO4·3.5H2O) AT 25 °C" Hydrometallurgy Volumes 2014, 144 ...

*Silver arsenate

... is an inorganic compound with the formula Ag3AsO4. It has been used in qualitative analysis to distinguish ... between phosphate(Ag3PO4 is yellow) and arsenate(V) solutions. American elements Godfrey, S.M.; et al. (1998). "Chapter 3". In ...

*Sodium arsenate

... is the inorganic compound with the formula Na3AsO4. Related salts are also called sodium arsenate, including ... Na2HAsO4 (disodium hydrogen arsenate) and NaH2AsO4 (sodium dihydrogen arsenate). The trisodium salt is a white or colourless ... "Radiocrystallographic study of dodecahydrate trisodium arsenate and vanadate Na3AsO4.12H2O and Na3VO4.12H2O, and some hydrates ...

*Ammonium arsenate

Acid salts are also known, including diammonium arsenate and ammonium dihydrogen arsenate. "Ammonium Orthoarsenate" in Handbook ... Ammonium arsenate is the inorganic compound with the formula (NH4)3AsO4. It is prepared by treating a concentrated solution of ...

*Arsenate minerals

Both the Dana and the Strunz mineral classifications place the arsenates in with the phosphate minerals. Example arsenate ... Arsenate minerals usually refer to the naturally occurring orthoarsenates, possessing the (AsO4)3− anion group and, more rarely ... 08.A Arsenates and vanadates without additional anions, without H2O 08.AA With small cations (some also with larger ones): 05 ... other arsenates with anions like AsO3(OH)2− (also written HAsO42−) (example: pharmacolite Ca(AsO3OH).2H2O) or (very rarely) [ ...

*Arsenate-reducing bacteria

... derive their energy from reducing arsenate (As(+5)) to arsenite (As(+3)) via arsenate reductase ... Arsenate-reducing bacteria are bacteria which reduce arsenates. Arsenate-reducing bacteria are ubiquitous in arsenic- ... Arsenate (As(+5)) has a pKa of 7.0, with HAsO42− and H2AsO41− being equally abundant at pH 7.0. Although arsenate is regarded ... It appears that arsenate reduction by the Desulfovibrio strain Ben-RA is catalyzed by an arsenate reductase that is encoded by ...

*Disodium hydrogen arsenate

The other sodium arsenates are NaH2AsO4 and Na3AsO4, the latter being called sodium arsenate. Disodium hydrogen arsenate is ... Disodium hydrogen arsenate is the inorganic compound with the formula Na2HAsO4.7H2O. The compound consists of a salt and seven ...

*Arsenate reductase (glutaredoxin)

... (EC 1.20.4.1) is an enzyme that catalyzes the chemical reaction arsenate + glutaredoxin ⇌ {\ ... reduction of arsenate to arsenite by human liver arsenate reductase". Chem. Res. Toxicol. 13 (1): 26-30. doi:10.1021/tx990115k ... Gladysheva T, Liu J, Rosen BP (1996). "His-8 lowers the pKa of the essential Cys-12 residue of the ArsC arsenate reductase of ... Silver S; Garber, Eric A. E.; Armes, L. Gene; Chen, Chih-Ming; Fuchs, James A.; Silver, Simon (1994). "Arsenate reductase of ...

*Arsenate reductase (donor)

The systematic name of this enzyme class is arsenate:acceptor oxidoreductase. This enzyme is also called arsenate:(acceptor) ... reduction of arsenate to arsenite by human liver arsenate reductase". Chem. Res. Toxicol. 13 (1): 26-30. doi:10.1021/tx990115k ... Arsenate reductase (donor) (EC 1.20.99.1) is an enzyme that catalyzes the chemical reaction arsenite + acceptor ⇌ {\ ... Krafft T, Macy JM (1998). "Purification and characterization of the respiratory arsenate reductase of Chrysiogenes arsenatis". ...

*Sodium dihydrogen arsenate

... disodium hydrogen arsenate) and NaH2AsO4 (sodium dihydrogen arsenate). Sodium dihydrogen arsenate is a colorless solid that is ... Sodium dihydrogen arsenate is the inorganic compound with the formula NaH2AsO4. Related salts are also called sodium arsenate, ...

*Chromated copper arsenate

... (CCA) is a wood preservative that has been used for timber treatment since the mid-1930s. It is a mix ... Biomonitoring of Arsenic in Urine and Saliva of Children Playing on Playgrounds Constructed from Chromated Copper Arsenate- ... Biomonitoring of Arsenic in Urine and Saliva of Children Playing on Playgrounds Constructed from Chromated Copper Arsenate- ... National Pesticide Information Center - Chromated Copper Arsenate (CCA): Guide to selected resources CPSC Test coatings to ...

*Lead hydrogen arsenate

... , also called lead arsenate, acid lead arsenate or LA, chemical formula PbHAsO4, is an inorganic ... Paris Green Calcium arsenate Peryea F.J. 1998. Historical use of lead arsenate insecticides, resulting in soil contamination ... Two principal formulations of lead arsenate were marketed: basic lead arsenate (Pb5OH(AsO4)3, CASN: 1327-31-7) and acid lead ... lead arsenate was frequently prepared by farmers at home, by reacting soluble lead salts with sodium arsenate. As an ...

*Arsenate-mycothiol transferase

... (EC 2.8.4.2, ArsC1, ArsC2, mycothiol:arsenate transferase) is an enzyme with systematic name ... H2O Reduction of arsenate is part of a defence mechanism of the cell against toxic arsenate. Ordonez, E.; Van Belle, K.; Roos, ... Arsenate-mycothiol transferase at the US National Library of Medicine Medical Subject Headings (MeSH) Molecular and Cellular ... This enzyme catalyses the following chemical reaction mycothiol + arsenate ⇌ {\displaystyle \rightleftharpoons } arseno- ...

*Copper(II) arsenate

Copper arsenate (Cu3(AsO4)2.4H2O, or Cu5H2(AsO4)4.2H2O), also called copper orthoarsenate, tricopper arsenate, cupric arsenate ... Lead arsenate Calcium arsenate Paris Green (copper acetoarsenite) Chromated copper arsenate Scheele's Green (copper arsenite) " ... Copper arsenate hydroxide or basic copper arsenate (Cu(OH)AsO4) is a basic variant with CAS number 16102-92-4. It is found ... Copper arsenate can also be a misnomer for copper arsenite, especially when meant as a pigment. Anhydrous copper arsenate, Cu3( ...

*Arsenate reductase (azurin)

... (EC 1.20.9.1) is an enzyme that catalyzes the chemical reaction arsenite + H2O + 2 azurinox ⇌ {\ ... displaystyle \rightleftharpoons } arsenate + 2 azurinred + 2 H+ The 3 substrates of this enzyme are arsenite, water, and ... oxidised azurin, whereas its 3 products are arsenate, reduced azurin, and hydrogen ion. This enzyme belongs to the family of ...

*Arsenate reductase (cytochrome c)

... arsenate + 2 reduced cytochrome c + 2 H+ Arsenate reductase is a molybdoprotein isolated from alpha-proteobacteria that ... Arsenate reductase (cytochrome c) (EC 1.20.2.1, arsenite oxidase) is an enzyme with systematic name arsenite:cytochrome c ... Arsenate reductase (cytochrome c) at the US National Library of Medicine Medical Subject Headings (MeSH) Molecular and Cellular ...

*Schreibersite

2000). "Schreibersite". Handbook of Mineralogy (PDF). IV (Arsenates, Phosphates, Vanadates). Chantilly, VA, US: Mineralogical ...

*Vanadinite

2000). "Vanadinite". Handbook of Mineralogy (PDF). IV (Arsenates, Phosphates, Vanadates). Chantilly, VA, US: Mineralogical ... arsenate (AsO4) and vanadate (VO4). Common impurities of vanadinite include phosphorus, arsenic and calcium, where these may ...

*Arsenic poisoning

... diphosphate-arsenate from ADP and arsenate in presence of succinate. Thus, by a variety of mechanisms arsenate leads to an ... Arsenate can replace phosphate in many reactions. It is able to form Glc-6-Arsenate in vitro; therefore it has been argued that ... Inorganic arsenites (arsenic(III)) in drinking water have a much higher acute toxicity than organic arsenates (arsenic(V)). The ... Kingston RL, Hall S, Sioris L (1993). "Clinical observations and medical outcome in 149 cases of arsenate ant killer ingestion ...

*Warikahnite

Along with arsenate ions (AsO₄)3−, the infrared spectrum revealed H₂O . These water molecules present in the warikahnite sample ... Volume IV: Arsenates, Phosphates and Vanadates. Mineral Data Publishing Company, Tucson, Arizons, p. 644 Riffel, H., P. Keller, ... Warikahnite is a rare zinc arsenate mineral of the triclinic crystal system with Hermann- Mauguin notation 1, belonging to the ... Mitt., 27, 187-199 (in German with English abs) Mandarino, Joseph A. (2006). "The Gladstone-Dale Compatibility of Arsenate ...

*Taranakite

Arsenates, Phosphates, Vanadates (PDF). IV. Tucson, Arizona: Mineral Data Publishing. ISBN 978-0-9622097-1-0. Dick, S.; Goßner ...

*Monosodium methyl arsonate

Monosodium methyl arsenate (MSMA) is an arsenic-based herbicide. It is an organo-arsenate; less toxic than the inorganic form ... of arsenates. It is one of the most common and cost effective herbicides used against weeds in agriculture. MSMA products are ...

*Catalase

Arsenate acts as an activator. Three-dimensional protein structures of the peroxidated catalase intermediates are available at ...
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TRIVENI INTERCHEM PVT. LTD. - Exporter, Manufacturer, Distributor, Supplier, Trading Company of Chromated copper arsenate based in Vapi, India
We couldnt find a conversion between moles Sodium Arsenate and kilomol Do a quick conversion: 1 moles Sodium Arsenate = 1 kilomol using the online calculator for metric conversions.
To further characterized the Drosophila bioassay as a screen to detect developmental toxicants, sodium arsenate heptahyrdrate (SAH; CAS 7631-89-2), a documented animal teratogen and developmental toxicant, was evaluated. SAH concentrations ranging from 263-1528 ug/vial were investigated in a series of three experiments using our published protocol (Teratogenesis, Carcinogenesis, and Mutagenesis 11
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Beyond Pesticides, January 4, 2011) A report released by the Environmental Working Group (EWG) finds that drinking water in 31 cities across the country is contaminated with hexavalent chromium, or chromium-6, a carcinogenic chemical contaminant with numerous sources including treated wood utility poles that line streets and backyards across the the United States. Wood treated with chromated copper arsenate (CCA), such as playgrounds, decks, and railroad ties, in addition to utility poles, can leach the chemicals into soils and groundwater, creating serious risks to public health. Other common sources of chromium-6 pollution include discharge from steel and pulp mills as well as metal-plating and leather-tanning facilities. It can also pollute water through erosion of natural deposits.. The use of CCA in the treatment of utility poles is notable not only because of the presence of poles in numerous communities throughout the country, but also because utility companies often donate or sell ...
ACQ stands for Alkaline Copper Quat. The main active ingredient is copper, which was the main active ingredient in CCA chromated copper arsenate pressure treatment, which was phased out in 2003. Though the copper remains the same, the other ingredients in ACQ are much less toxic than the chromium and arsenic that were used in CCA. According to manufacturers literature on ACQ, quat acts as a co-biocide, providing additional protection from fungi and insect attack that copper alone would not control. Quats are commonly used in household disinfectants and cleaners, and in swimming pools and spas. Quats are biodegradable in soil. Recently my husband and I were faced with a decision as to whether or not we would use ACQ treated wood for posts to hold a garden gate. At both Lowes and Home Depot, free information on ACQ treated wood was obviously displayed. These are interesting documents. On the one hand they say wear a dust mask when cutting, wear gloves when handling, wash exposed areas thoroughly ...
ATP uses free energy created by hydrolysis to drive endergonic reactions through phosphorylation. The phosphorylation process involves transferring the ATPs phosphate to a protein or molecule, such...
Pressure-treated wood impregnated with chromated copper arsenate (CCA) - often with a greenish tint - was widely used for decks and porches prior to its being discontinued for residential use in 2003-2004. Since treated wood has a long lifespan, there is still plenty of CCA pressure-treated wood surrounding residences, prompting caution due to its arsenic content. Pressure-treated wood impregnated with chromated copper arsenate (CCA) - often with a greenish tint - was widely used for decks and porches prior to its being discontinued for residential use in 2003-2004. Since treated wood has a long lifespan, there is still plenty of CCA pressure-treated wood surrounding residences, prompting caution due to its arsenic content.
... : Dry lake in the Searles Valley of the Mojave Desert. The evaporite basin is approximately 19 km (12 mi) long and 13 km (8.1 mi) at its widest point. The mining community of Trona is on its western ...
Arsenic is a toxic metalloid which is widely distributed in nature. It is normally present as arsenate under oxic conditions while arsenite is predominant under reducing condition. The major discharges of arsenic in the environment are mainly due to natural sources such as aquifers and anthropogenic sources. It is known that arsenite salts are more toxic than arsenate as it binds with vicinal thiols in pyruvate dehydrogenase while arsenate inhibits the oxidative phosphorylation process. The common mechanisms for arsenic detoxification are uptaken by phosphate transporters, aquaglyceroporins, and active extrusion system and reduced by arsenate reductases via dissimilatory reduction mechanism. Some species of autotrophic and heterotrophic microorganisms use arsenic oxyanions for their regeneration of energy. Certain species of microorganisms are able to use arsenate as their nutrient in respiratory process. Detoxification operons are a common form of arsenic resistance in microorganisms. Hence, the use of
Mono- and Stereopictres of 5.0 Angstrom coordination sphere of Arsenic atom in PDB 1j9b: Arsenate Reductase+0.4M Arsenite From E. Coli
Ive found something new to blame all my troubles on. Failing memory. Gray hair. Weight gain. Fatigue. Poor eyesight. Lack of muscle tone. The culprit could be chromated copper arsenate. Say that fast three times. I dont mean to make light of what is a serious health concern. But until I read Times staff writer Julie Hausermans investigative report March 11, I didnt even know it existed. Now, it turns out, I and untold others may have been poisoned by chemically treated wood, the kind many of us use to build the decks, fences and doghouses in our back yards. Even though manufacturers and the federal government have known for decades that the treated wood poses a risk to those who touch it, and that it can leach poisonous arsenic into the ground, the word hasnt trickled down to the masses of folks who buy the stuff. Clearly printed warnings might have accomplished that, but the government -- specifically the Environmental Protection Agency -- delegated that responsibility to the people who ...
Manufacturer and exporter miscellaneous chemicals, aluminum potassium sulfate, calcium arsenite, calcium borate, calcium boride, calcium chloride hydrate reagent, calcium molybdate, calcium permanganate, calcium salts, inorganic chemicals, potassium pentaborate, potassium pyrophosphate, potassium tetraborate, pyrophosphates (salts), sodium arsenate, sodium arsenite, sodium bisulfate, sodium borate, sodium cacodylate, sodium chromate, sodium cobaltinitrite, sodium copper cyanide. Bhagwati Chemicals Vadodara
Mesoporous pellet adsorbent developed from mixing at an appropriate ratio of natural clay, iron oxide, iron powder, and rice bran was used to investigate the optimization process of batch adsorption parameters for treating aqueous solution coexisting with arsenate and arsenite. Central composite design under response surface methodology was applied for optimizing and observing both individual and interactive effects of four main influential adsorption factors such as contact time (24-72 h), initial solution pH (3-11), adsorbent dosage (0-20 g/L) and initial adsorbate concentration (0.25-4.25 mg/L). Analysis of variance suggested that experimental data were better fitted by the quadratic model with the values of regression coefficient and adjusted regression coefficient higher than 95%. The model accuracy was supported by the correlation plot of actual and predicted adsorption efficiency data and the residual plots. The Pareto analysis suggested that initial solution pH, initial adsorbate concentration,
Udv a vegekrol, szerintem ez a ket vicc angolul is jo, hadd ne forditsam le oket. This is a story about Bosnian communism, a very particular form of Yugoslav communism, which is itself, of course, a particular branch of communism. Two friends, Mujo and Haso, are walking down a road. Suddenly, they find a piece of excrement (I suppose we can call it "shit") on the road. So Mujo says to Haso: - Haso, I shall pay you 100 dinars if you eat this shit on the road. Haso says, after a thought: "All right", and he eats it. So Mujo pays him 100 dinars and they continue their walk. After a certain time they find another shit on the road. This time Haso says: - Mujo, if you eat this shit I shall pay you 100 dinars. Mujo thinks for a while, says "All right", and eats it. Haso pays him then 100 dinars. And they continue walking... After a bit of thought Mujo feels uncomfortable and is unsatisfied. He says to Haso: - Listen, Haso, I think we are two idiots. We have both eaten shit, and nobody had no profit out ...
antibody-antibodies.com is the marketplace for research antibodies. Find the right antibody for your research needs. Disruption of ptLPD1 or ptLPD2, genes that encode isoforms of the plastidial lipoamide dehydrogenase, confers arsenate hypersensitivity in Arabidopsis.
The befitting capping capabilities of AsO43− provide a stable Cu2O nanocatalyst from a galvanic reaction between a Cu(ii) precursor salt and As(0) nanoparticles. This stable Cu2O hydrosol appears to be a suitable catalyst for the one-electron transfer reversible redox reaction between Eosin Y and NaBH4. The
Suite à la minéralization en fer de type skarn dâge tardi-miocène à Mega Livadi sur lîle de Serifos, en Grèce, il y eut un épisode de minéralisation hydrothermale en Cu et As dans les calcaires au contact supérieur dun pluton granodioritique. La minéralisation hypogène, avec pyrite, minéraux du groupe de la tennantite arsenifères et larsénopyrite, ont subi une forte altération au cours du Pliocène et du Quaternaire, attribuable aux eaux météoriques descendantes. Nous subdivisons les processus géogéniques et anthropogéniques responsables de cette altération en cinq stades, avec distinctions dans leurs bilans déléments, leur Eh et leur pH. Les stades supergènes I à III contiennent un assemblage varié doxydes, dhydroxydes et darsenates: stade I (goethite, mélange de minéraux Fe-As-Sb-Cu à grains fins, pharmacosidérite), stade II (beudantite riche en Sb, beudantite riche en terres rares), et stade III (arséniosidérite). Les ...
In chapter 3, "The Sense of Sensibility," author Wendy Jones uses scenes from one of Jane Austens most celebrated novels to illustrate the functioning of the bodys stress response system.. 0 Comments. ...
Olivenite Group. Structurally distinct, intermediate member of the solid solution series between Olivenite and Adamite with a Zn:Cu ratio of (ideally) ...
Development of KTiOAsO4 and isostructural arsenates as new electrooptic materials. This involves (a) the growth of crystals of suitable size and quality for research, (b) investigation of their structural, optical and physical properties: the establishment of structure/property relationships, (c) development of waveguide fabrication methods in KTiOAsO4, (d) investigation of crystal twinning and poling methods for its elimination. ...
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Page 9 - (Disclaimer: So this turned out to be longer than I thought it would, and a bit of a rant. Sorry! But I think this is something thats relevant to all of us). Some background: I work in a combined
In molecular biology, the ars operon is an operon found in several bacterial taxon. It is required for the detoxification of arsenate, arsenite, and antimonite. This system transports arsenite and antimonite out of the cell. The pump is composed of two polypeptides, the products of the arsA and arsB genes. This two-subunit enzyme produces resistance to arsenite and antimonite. Arsenate, however, must first be reduced to arsenite before it is extruded. A third gene, arsC, expands the substrate specificity to allow for arsenate pumping and resistance. ArsC is an approximately 150-residue arsenate reductase that uses reduced glutathione (GSH) to convert arsenate to arsenite with a redox active cysteine residue in the active site. ArsC forms an active quaternary complex with GSH, arsenate, and glutaredoxin 1 (Grx1). The three ligands must be present simultaneously for reduction to occur. ArsA and ArsB form an anion-translocating ATPase. The ArsB protein is distinguished by its overall hydrophobic ...
Problem: Until the early 2000s, most of the pressure-treated wood used in the United States for outdoor structures such as playground equipment, picnic tables, benches and decks was treated with the preservative, Chromated Copper Arsenate (CCA). This chemical was the primary preservative used in the pressure-treating process to protect wood against weather, mold and insects. Studies show that CCA-treated wood is continually leaching (releasing) arsenic to the surface of the wood. Arsenic is known to cause cancer in humans: it is a potent skin, bladder and lung carcinogen. Arsenic is also linked to liver and kidney cancer, immune system suppression, increased risk of high blood pressure, cardiovascular disease, endocrine disruption (altering normal hormone levels or activity in the body) and diabetes. Studies have confirmed that high levels of arsenic can be released onto childrens hands by direct contact with arsenic-treated wood. Young children, in particular, are at risk of ingesting ...
TY - JOUR. T1 - The importance of glutathione and phytochelatins on the selenite and arsenate detoxification in Arabidopsis thaliana. AU - Aborode, Fatai Adigun. AU - Raab, Andrea. AU - Voigt, Matthias. AU - Costa, Leticia Malta. AU - Krupp, Eva M. AU - Feldmann, Joerg. N1 - This study was supported by the Tesla Research Funds. L.M.C. thanks CNPq (201969/2010-6) for her research visit to Aberdeen and M.V. thanks the European Erasmus Exchange programme. PY - 2016/11. Y1 - 2016/11. N2 - We investigated the role of glutathione (GSH) and phytochelatins (PCs) on the detoxification of selenite using Arabidopsis thaliana. The wild-type (WT) of Arabidopsis thaliana and its mutants (glutathione deficient Cad 2-1 and phytochelatins deficient Cad 1-3) were separately exposed to varying concentrations of selenite and arsenate and jointly to both toxicants to determine their sensitivities. The results of the study revealed that, the mutants were about 20-fold more sensitive to arsenate than the WT, an ...
Children are more likely to be exposed to harmful levels of arsenic from play structures, picnic tables and decks than from drinking water according to a recent Environmental Working Group (EWG) study. "We know that arsenic in drinking water is dangerous for kids, but what we found was that the arsenic in lumber is an even greater risk," said EWG analyst Renee Sharp. "In less than ten days, an average five year old playing on an arsenic-treated playset would exceed the lifetime cancer risk considered acceptable under federal pesticide law." The report, entitled "Poisoned Playgrounds," is based on analysis of data from 180 samples of treated wood taken across the U.S. and an extensive review of scientific literature.. Virtually all of the lumber sold for outdoor use in the U.S. is pressure-treated and injected with toxins that act as preservatives and pesticides. Chromated copper arsenate (CCA) is the most common wood preservative used in the U.S., containing 22% pure arsenic. Arsenic is an acute ...
Town of North Hempstead Supervisor Judi Bosworth is continuing to urge PSEG Long Island to use nontoxic preservatives on its utility poles, after it was reported this week that the utility company would start transitioning away from using the controversial preservative pentachlorophenol (penta) and towards using a different one called CCA, or Chromated Copper Arsenate. Penta and CCA are both restricted-use pesticides and are approved by the EPA for utility poles. CCA contains known carcinogens when inhaled or ingested.. "It seems that PSEG is just exchanging one poison for another," said Bosworth. "Simply trading penta for CCA doesnt make sense or address the issue. I will continue to urge our utility companies to use non-toxic treatments for wooden poles or to begin using composite poles or another safe alternative.". In a letter to PSEG-LI President and CEO David Daly, Bosworth stated: "Cost-saving measures that put citizens health at risk are short sighted. With PSEG-LI setting about 4,000 ...
Founded in 2007, Jiangxi Qianhua Industry Co., Ltd. is a specialized production and trade enterprise. Now, we are mainly engaged in the research and manufacturing of fine chemicals.
TY - JOUR. T1 - Increasing the arsenate adsorption capacity of neutralized red mud (Bauxsol). AU - Genc Fuhrman, Hülya. AU - Tjell, Jens Christian. AU - McConchie, D.. PY - 2004. Y1 - 2004. M3 - Journal article. VL - 271. SP - 313. EP - 320. JO - Journal of Colloid and Interface Science. JF - Journal of Colloid and Interface Science. SN - 0021-9797. ER - ...
The arsenic speciation and arsenic removal in chitosan packed column were studied. Arsenic removal experiments were carried out with an arsenic standard solution (1.0 mg/l) and drilled well water samples from Limon Mine Community at different pH, water flowrate, and volume of adsorbent material. The simulation of arsenic speciation was carried out at a pH range from 0 to 12, a temperature of 25ºC, a pE equal to 4, and a total arsenic concentration of 1.34 x 10-5 mol kg-1. According to speciation calculations arsenic is found mainly in oxidized form in the conditions of Limon Mines drilled well waters, dihydrogen arsenate ion (H2AsO4-), and hydrogen arsenate ion (HAsO42-) being the major species. The experiments showed that arsenic adsorption depends mainly on the pH as well as the activity of functional groups that compose the chitosan structure. At pH 3 and volume of adsorbent material of 337.8 cm3 an adsorption of 94% was obtained from arsenic standard solution, and the arsenic present in ...
The article explains why it was that standards of proof that were acceptable to different degrees to geologists, physicists and biologists were unacceptable to chemists. The answer pertains to what we call "background knowledge". In this case, chemists were compelled to ask how DNA with arsenic replacing phosphorus in its backbone could possibly be stable given everything they knew about the instability of arsenate esters. The latter had been studied for several decades, and while arsenic DNA itself had not been synthesized before, simpler arsenate esters were known to be highly unstable in water. The chemists were quite confident in extrapolating from these simple cases to questioning the stable existence of arsenic DNA; if arsenic DNA indeed were so stable, then almost everything they had known about arsenate esters for fifty years would have been wrong, a possibility that was highly unlikely. Thus for chemists, arsenic DNA was an extraordinary claim. And as Carl Sagan said, they needed to see ...
More than 500 tufa spires rise up from the basin of the ancient Searles Lake bed 10-miles south of Trona, a depressed mining town. Similar to Mono Lake, these tufa towers formed underwater as calcium carbonate precipitated out of the water over time, only to be exposed later as the lake bed dried up. The towers range in age from 10,000 - 100,000 years old.
Villadangos, A. F., K. Van Belle, K. Wahni, V. Tamu Dufe, S. Freitas, H. Nur, S. De Galan, J. A. Gil, J-F. Collet, L. M. Mateos, et al., Corynebacterium glutamicum survives arsenic stress with arsenate reductases coupled to two distinct redox mechanisms., Mol Microbiol, vol. 82, issue 4, pp. 998-1014, 2011 Nov. ...
Villadangos, A. F., K. Van Belle, K. Wahni, V. Tamu Dufe, S. Freitas, H. Nur, S. De Galan, J. A. Gil, J-F. Collet, L. M. Mateos, et al., Corynebacterium glutamicum survives arsenic stress with arsenate reductases coupled to two distinct redox mechanisms., Mol Microbiol, vol. 82, issue 4, pp. 998-1014, 2011 Nov. ...
Searles Lake is located at Trona, CA. Its a remnant from wetter times in the Pleistocene. Carbonate and borate minerals are mined from the lake; a pile of trona is visible on the far right of the image at the Westend plant.. ...
Purchase your copy of BS EN 2122:1996 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available online in electronic and print formats.
Study Fails to Confirm Existence of Arsenic-Based Life - Scientific American: Rosie Redfield of the University of British Columbia has completed her attempts to replicate the findings of Felicia Wolfe-Simon, namely that the GFAJ-1 bacterium could utilize arsenic in its DNA backbone in the place of phosphorous. UPDATE: Redfield Lab manuscript available on arXiv ...
Evaluating Essential Perfusion Skills: An Application of High Fidelity Simulation. AmSECT Best Practice / ICEBP Meeting, San Diego, California, October 10, 2012 -- 2 hour session - co-presented with Ed Darling - Session Organizer & Speaker - (B. Searles ...
Ive just been exchanging emails with someone else who is trying to grow GFAJ-1 "to look at the DNA". Theyre also dealing with a media-related problem, though not the same problem as mine ...
Plasmid XNOR-gate-V2.0-ASV from Dr. Drew Endys lab contains the insert XNOR-gate and is published in Science. 2013 May 3;340(6132):599-603. doi: 10.1126/science.1232758. Epub 2013 Mar 28. This plasmid is available through Addgene.
Inorganic arsenic is used for hardening copper and lead alloys. It also is used in glass manufacturing as a decolorizing and refining agent, as a component of electrical devices, in the semiconductor industry, and as a catalyst in the production of ethylene oxide. Arsenic compounds are used as a mordant in the textile industry, for preserving hides, as medicinals, pesticides, pigments, and wood preservatives. Approximately 90% of the domestic consumption of arsenic is currently used with production of chromated copper arsenate (CCA), a wood preservative, the production of which is currently being phased out. Arsenic is also found naturally in the environment and is typically present in soil and water at detectable levels. Sources of human exposure to inorganic arsenic include drinking water, diet, air, and soils (which can contain naturally occurring arsenic or contamination from anthropogenic sources). This draft IRIS health assessment addresses only cancer human health effects that may result ...
TY - JOUR. T1 - Catalysts and supports for conversion of lactic acid to acrylic acid and 2,3-pentanedione. AU - Gunter,Garry C.. AU - Langford,Robert H.. AU - Jackson,James E.. AU - Miller,Dennis J.. PY - 1995/3. Y1 - 1995/3. N2 - The catalytic conversion of lactic acid over various sodium salt catalysts and support materials has been carried out to identify potential catalyst/support combinations for 2,3-pentanedione and acrylic acid production. Low surface area, pure silica is the best support for suppressing undesirable side reactions to acetaldehyde and propanoic acid, which are favored over high surface area (microporous) or surface acidic materials. The best catalysts for 2,3-pentanedione and acrylic acid formation are the sodium salts of group IV and group V oxides, with sodium arsenate giving a 2,3-pentanedione yield of 25% and combined selectivity to acrylic acid and 2,3-pentanedione of 83% at 300 °C and 0.5 MPa total pressure.. AB - The catalytic conversion of lactic acid over various ...
p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.,/p> ,p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.,/p> ,p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).,/p> ,p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x,sup>64,/sup> + x,sup>4,/sup> + x,sup>3,/sup> + x + 1. The algorithm is described in the ISO 3309 standard. ,/p> ,p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.,br /> ,strong>Cyclic redundancy and other checksums,/strong>,br /> ,a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993),/a>),/p> Checksum:i ...
During the past five decades, the use of X-ray analytical methods has increased in the areas of materials characterization and phase identification. The wide range of applicability of the X-ray fluorescence method has made it a technique employed in thousands of laboratories all over the world. Over the years, many techniques and procedures have been developed that greatly enhance the versatility of the method. The purpose of the X-ray clinic is to combine theoretical and practical application of X-ray fluorescence spectrometry ...
Acidiphilium multivorum (strain DSM 11245 / JCM 8867 / AIU301) is an acidophilic, aerobic, anoxygenic, phototrophic, Gram-negative bacterium isolated from pyritic acid mine drainage. A.multivorum has high ability of resistance to various metals under acidic condition, and require high acidity for growth. It exhibits tolerance towards some heavy metal ions like nickel, zinc, cadmium and copper, and resistance to arsenate and arsenite. A. multivorum has zinc-chelated-bacteriochlorophylls (Zn-Bchl) a rather than Mg-Bchl a as the major photopigment. Among the mesoacidophilic bio-mining heterotrophs, A. multivorum has the unique ability to oxidize arsenite to arsenate as well as the capability to utilize a wide range of organic compounds for growth. These features make this bacterium a suitable host for carrying purpose specific genes for developing bioleaching operations. Current trends in biohydrometallurgy emphasize genetic engineering of bio-mining bacteria to achieve further success in this ...
Pressure-treated wood has a long history−its been around since the second half of the 19th century. Wood has been preserved with chemicals containing various pesticides as a means to protect against such intruders as termites and decay fungi. This course will provide a background on traditional CCA-treated wood, and will introduce the next-generation preservative−copper azole. We will discover how it works, why it exists, what it protects against, available types, how it is made, where it is used, and how it differs from traditional treated wood, including its key features. At the completion of this course, you will be able to describe the pressure preservative process, explain the treated wood transition that occurred in 2003, discuss the features and uses of copper azole-treated wood, and detail the many environmental benefits of treated wood ...
1JL3: Bacillus subtilis arsenate reductase is structurally and functionally similar to low molecular weight protein tyrosine phosphatases.
High arsenic (As) concentrations are toxic to all the living organisms and the cellular response to this metalloid requires the involvement of cell signaling agents, such as nitric oxide (NO). The As toxicity and NO signaling were analyzed in Pistia stratiotes leaves. Plants were exposed to four treatments, for 24 hours: control; SNP (sodium nitroprusside (NO donor); 0.1 mg L-1); As (1.5 mg L-1) and As + SNP (1.5 and 0.1 mg L-1, respectively). The absorption of As increased the concentration of reactive oxygen species (ROS) and triggered changes in the primary metabolism of the plants. While photosynthesis and photorespiration showed sharp decrease, the respiration process increased, probably due to chemical similarity between arsenate and phosphate, which compromised the energy status of the cell. These harmful effects were reflected in the cellular structure of P. stratiotes, leading to the disruption of the cells and a possible programmed cell death. The damages were attenuated by NO, which was able
II. Cacodylate Buffer (arsenate buffer) pH 5-7.4. Advantages:. 1. Easy to prepare.. 2. Stable during storage for long periods of time.. 3. Does not support growth of microorganisms.. 4. Precipitates usually do not occur. Precipitates do not occur at low concentrations of calcium.. Disadvantages:. 1. Toxic. Contains arsenic.. 2. Unpleasant smell.. Preparation of Buffer:. Stock solutions:. 0.2M sodium cacodylate 1 liter. Na(CH3)2As02*3H20 (MW = 195.92) 42.8 gm. + ddH20 to make 1 liter. 0.2M HC1. Conc. HC1 (36-38%) 10 ml. ddH20 603 ml. Working buffer: 0.1M 100 ml. Adjust 50 ml of 0.2M sodium cacodylate to desired pH with 0.2M HC1. Dilute to 100 ml with ddH20 or dilute 1:1 with fixative.. pH 0.2M HC1 (ml). 6.4 18.3. 6.6 13.3. 6.8 9.3. 7.0 6.3. 7.2 4.2. 7.4 2.7. Buffer may also be made with cacodylic acid.. Stock solutions:. 0.2M cacodylic acid 1 liter. (CH3)2AsO2H (MW = 138.0) 27.6 gm. + ddH20 to make 1 liter. 0.2M NaOH 100 ml. NaOH (MW = 40) 0.8 gm. + ddH20 to make 100 ml. Working buffer: ...
Phosphate minerals WikipediaPhosphate minerals are those minerals that contain the tetrahedrally coordinated phosphate (PO43−) anion along with the freely substituting arsenate (As
Asphalt Recycling & Reclaiming Associations (ARRA) primary function has been to promote the recycling of existing roadway materials through various construction methodologies, to preserve limited natural resources and reduce costs. Asphalt Recycling and Reclaiming Association, Asphalt Recycling, Reclaiming, Hot Recycling, Hot In-Place Recycling, Cold Planing, Cold In-Place Recycling, Full Depth Reclamation, Soil Stabilization
The reagents for the methods I just listed would cost less than $1,000 (total, not each). A round of sequencing costs $10 - the price of a Starbucks latte. In a subsequent interview, Oremland (the papers senior author) said that they did not have enough money to do more experiments. This is like saying that you hired the Good Year blimp to take you downtown but didnt have enough money for a taxi back home.. 3. Even if some of the bacteria incorporate arsenic in their DNA, it means nothing if they cannot propagate. Essentially, they can linger as poison-filled zombies that will nonetheless register as "alive" through such tests as culture turbidity and even sluggish metabolism.. NASA spokespeople, as well as Wolfe-Simon and Oremland, have stated that the only legitimate and acceptable critiques are those that will appear in peer-reviewed venues - and that others are welcome to do experiments to confirm or disprove their findings.. The former statement is remarkably arrogant and hypocritical, ...
Due to the excellent selectivity and precision, wavelength dispersive X-ray fluorescence spectrometry is the ideal technique for monitoring TaNx films.
Plasmid pIS1 mINSIG2 from Dr. David Bartels lab contains the insert INSIG2 3UTR and mutated miR-155 binding site and is published in Mol Cell. 2014 Mar 20;53(6):1031-43. doi: 10.1016/j.molcel.2014.02.013. Epub 2014 Mar 13. This plasmid is available through Addgene.
Okay so I noticed my lack of including info has sparked my providing additional information regarding ASV support. I have a resmed aircurve 10 ASV and having a little difficulty getting use to it. Its
Yamaha (XG Standard), Yamaha Tyros 1, Yamaha Tyros 2, Yamaha Tyros 3, Yamaha Tyros 4, Yamaha Tyros 5, Yamaha Genos, Yamaha PSR-S600, Yamaha PSR-S700, Yamaha PSR-S900, Yamaha PSR-S650, Yamaha PSR-S750, Yamaha PSR-S950, Yamaha PSR-S670, Yamaha PSR-S770, Yamaha PSR-S970, Yamaha PSR-S775, Yamaha PSR-S975, Yamaha PSR-A1000, Yamaha PSR-A2000, Yamaha PSR-A3000, Yamaha PSR-8000, Yamaha PSR-9000… ...
Yamaha (XG Standard), Yamaha Tyros 1, Yamaha Tyros 2, Yamaha Tyros 3, Yamaha Tyros 4, Yamaha Tyros 5, Yamaha Genos, Yamaha PSR-S600, Yamaha PSR-S700, Yamaha PSR-S900, Yamaha PSR-S650, Yamaha PSR-S750, Yamaha PSR-S950, Yamaha PSR-S670, Yamaha PSR-S770, Yamaha PSR-S970, Yamaha PSR-S775, Yamaha PSR-S975, Yamaha PSR-A1000, Yamaha PSR-A2000, Yamaha PSR-A3000, Yamaha PSR-8000, Yamaha PSR-9000… ...
Looking for online definition of dimethylarsinic acid in the Medical Dictionary? dimethylarsinic acid explanation free. What is dimethylarsinic acid? Meaning of dimethylarsinic acid medical term. What does dimethylarsinic acid mean?
Evaporation in arid lands enriches mineral accumulation in their lakes. Playas may be sources of mineral deposits formed by evaporation. Water evaporating in closed basins precipitates minerals such as gypsum, salts (including sodium nitrate and sodium chloride), and borates. The minerals formed in these evaporite deposits depend on the composition and temperature of the saline waters at the time of deposition. Significant evaporite resources occur in the Great Basin Desert of the United States, mineral deposits made forever famous by the "20-mule teams" that once hauled borax-laden wagons from Death Valley to the railroad. Boron, from borax and borate evaporites, is an essential ingredient in the manufacture of glass, ceramics, enamel, agricultural chemicals, water softeners, and pharmaceuticals. Borates are mined from evaporite deposits at Searles Lake, California, and other desert locations. The total value of chemicals that have been produced from Searles Lake substantially exceeds $1 ...
using it instead of phosphorus in their biochemistry. To determine this, Dr. Wolfe-Simon took samples of the microbes, adding more and more arsenic while decreasing the amount of phosphorus in their environment to essentially zero. This would kill almost everything known to man, yet these little critters thrived. Even weirder, the bacteria were able to survive when either the phosphorus or the arsenic was reduced, but not both. So somehow, its able to use both of these elements as needed to survive.. Amazingly, using radioisotope-tagged molecules containing arsenic, they were able to find that the microbes incorporated the arsenic into their very DNA! Its hard to stress how shocking this is; as I understand it, saying something like that to a microbiologist without evidence wouldve had them slowly backing away from you and looking for weapons or an escape route.. That is seriously freaky. So what does this mean in the scale of things?. For one thing, it means that life, as Jeff Goldblum so ...
Arsenic toxicity is species-dependent for mammals and is transformed to other metabolites in various organs. In order to understand its metabolism, in-vitro simulation experiments were set up for various organ tissues. As(V) was transformed to As(III), while DMA(V) was changed to DMAS in sheep rumen, but the suspected MA-V) was not formed. This is different for the incubation of seaweed in rumen fluid, which points to a different unknown source for MA(V). In another study, dog MDCK kidney cells showed that inorganic arsenicals were methylated in kidney cells while the exposed DMAS was only oxidized to DMA(V) in kidney cells, and the exposed DMA(V) rarely transformed. The toxicities of arsenicals in dog kidney cells is dependant upon the uptake rates and the transformation of arsenicals. DMAS was as toxic as the inorganic arsenic species and an order to magnitude more toxic than the oxo-species. Methylated arsenic species can accumulate in hair and wool and can be used as a biomarker for arsenic ...
The AsIII and AsV adsorption capacity of biochar, chabazite, ferritin-based material, goethite and nano zerovalent iron was evaluated in artificial systems at autoequilibrium pH (i.e. MilliQ water without adjusting the pH) and at approximately neutral pH (i.e. TRIS-HCl, pH 7.2). At autoequilibrium pH, iron-based sorbents removed 200 ug L-1 As highly efficiently whereas biochar and chabazite were ineffective. At approximately neutral pH, sorbents were capable of removing between 17 and 100% of AsIII and between 3 and 100% of AsV in the following order: biochar,chabazite,ferritin-based material,goethite,nano zero-valent iron. Chabazite, ferritin-based material and nano zero-valent iron oxidised AsIII to AsV and ferritin-based material was able to reduce AsV to AsIII. When tested in naturally As-contaminated groundwater, a marked decrease in the removal effectiveness occurred, due to possible competition with phosphate and manganese. A biological oxidation step was then introduced in a one-phase ...
Arsenobetaine, arsenocholine, monomethylarsonic acid, dimethylarsinic acid, arsenous (III) acid, arsenic (V) acid. The concentration of speciated arsenics is determined by using high performance liquid chromatography (HPLC) to separate the species coupled to an ICP-DRC-MS to detect the arsenic species. This analytical technique is based on separation by anion-exchange chromatography (IC), followed by detection using quadrupole ICP-MS technology, and includes DRC™ technology (Baranov VI et al., 1999), which minimizes or eliminates many argon-based polyatomic interferences (Tanner S et al., 2000) will require 0.5 mL of urine. Arsenic species column separation is largely achieved due to differences in charge-charge interactions of each negatively-charged arsenic component in the mobile phase, with the positively-charged quaternary ammonium groups bound at the columns solid-liquid interface. Upon exit from the column, the chromatographic eluent goes through a nebulizer, where it is converted into ...
The electrokinetic technique is an emerging technology presently tested in situ to remove dissolved heavy metals from contaminated groundwater. There is a growing interest for using this system to cleanse clayey soil contaminated by toxic metallic ions. Currently, there are very few available non-destructive treatment methods that could be successfully applied in situ on low permeable type of soil matrix. The main objective of presented study was to validate and possibly enhance the overall efficiency of decontamination by the electrokinetic technique of the low permeable soil polluted by the arsenic in combination with chromium and copper ions. The chosen mixture of ions was imitating leak of pesticide well known as chromate copper arsenate (CCA). The chosen technique is showing a big promise to be used in the future as a portable, easy to install and run on sites with spills or leaks hard to reach otherwise; such as in the dense populated and urbanized areas. Laboratory electrokinetic experiments were
Arsenic is used in bronzing, pyrotechny, and for hardening and improving the sphericity of shot. The most important compounds are white arsenic, the sulfide, Paris green, calcium arsenate, and lead arsenate; the last three have been used as agricultural insecticides and poisons. Marshs test makes use of the formation and ready decomposition of arsine. Arsenic is finding increasing uses as a doping agent in solid-state devices such as transistors. Gallium arsenide is used as a laser material to convert electricity directly into coherent light.. ...
The new mineral species whitecapsite, H16Fe2+5Fe3+14Sb3+6(AsO4)18O16·120H2O, was found in the oxidation zone of the White Caps gold deposit (White Caps mine), Manhattan district, Nye Co., Nevada, USA, and named after the holotype locality. The mineral was found in cavities in a breccia consisting of fragments of jasperoid, silicified marble and mica schist, in association with picropharmacolite, guerinite, pitticite, gypsum, jarosite, goethite, sulfur, metastibnite and earlier quartz, calcite, kaolinite, realgar, stibnite, arsenopyrite, pyrite, sphalerite, orpiment, cinnabar and metacinnabar. Whitecapsite occurs as well-shaped hexagonal prismatic crystals (up to 0.3 × 0.3 × 1.5 mm) terminated with bipyramidal faces (forms: {110} and {111}) and as clusters of crystal up to 1 mm in maximal dimension. It is bright orange to golden-brownish orange, transparent, with a vitreous lustre. Mohs hardness is 2-2½. The mineral is brittle, cleavage was not observed, fracture is uneven. Dmeas = 2.30(3), ...
GFAJ-1 adalah bakteri ekstremofili berbentuk tongkat dari famili Halomonadaceae yang, ketika kekurangan fosfor, mampu menggunakan arsenik yang merupakan bahan beracun.[1] Penemuan ini menunjukkan bahwa kehidupan di planet lain mungkin bertahan dengan susunan kimia yang berbeda.[1][2]. Penemuan ini ditemukan oleh tim yang dipimpin oleh astrobiolog NASA, Felisa Wolfe-Simon.. ...
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The Mono Lake State Reserve, California wall mural by Alain Thomas will add a distinctive touch to any room. Choose from standard sizes or get a custom size to perfectly fit your wall.
A r gi orsz gaiban l n kh z k pest a magyar asszonyok t bb id t t ltenek a gyermekeikkel s h zast rsukkal, mint munk val. A magyar h lgyek a szabadidej k jelent s r sz ben h zimunk t v geznek, s alig jut idej k arra, hogy sportoljanak, sz rakozzanak vagy k nyvet olvassanak.
A bels molekul ris ra megmondja a v rusnak, mennyi ideje van arra, hogy oszt djon, megfert zz n m s sejteket, s tterjedjen m s emberi l nyekre.
Acts 14 - And it came to pass in Iconium that they entered together into the synagogue of the Jews, and so spake that a great multitude both of Jews and of Greeks believed.
Arsenic biochemistry refers to biochemical processes that can use arsenic or its compounds, such as arsenate. Arsenic is a moderately abundant element in Earths crust, and although many arsenic compounds are often considered highly toxic to most life, a wide variety of organoarsenic compounds are produced biologically and various organic and inorganic arsenic compounds are metabolized by numerous organisms. This pattern is general for other related elements, including selenium, which can exhibit both beneficial and deleterious effects. Arsenic biochemistry has become topical since many toxic arsenic compounds are found in some aquifers, potentially affecting many millions of people via biochemical processes. The evidence that arsenic may be a beneficial nutrient at trace levels below the background to which living organisms are normally exposed has been reviewed. Some organoarsenic compounds found in nature are arsenobetaine and arsenocholine, both being found in many marine organisms. Some ...
The Case for Toxins Causing Polio. 1824: Metal workers had suffered for centuries from a paralysis similar to polio caused by the lead and arsenic in the metals they were working with. English scientist John Cooke observed: The fumes from these metals, or the receptance of them in solution into the stomach, often causes paralysis.. 1890: Lead arsenate pesticide started to be sprayed in the US up to 12 times every summer to kill codling moth on apple crops. 1892: Polio outbreaks began to occur in Vermont, an apple growing region. In his report the Government Inspector Dr. Charles Caverly noted that parents reported that some children fell ill after eating fruit. He stated that infantile paralysis usually occurred in families with more than one child, and as no efforts were made at isolation it was very certain it was non-contagious (with only one child in the family having been struck). 1907: Calcium arsenate comes into use primarily on cotton crops. 1908: In a Massachusetts town with three ...
Results for arsenic speciation equipment from Trace2o Arsenometer and other leading brands. Compare and contact a supplier serving Netherlands Antilles
The aim of this paper is to report on the presence of chemical interferences in the quantitation of methylated arsenic species in human urine when using a method based on selective volatile arsine species generation, chromatographic separation, and hydride generation atomic absorption spectrometry HGAAS detection. An abnormal profile of...
Find all books from Musik: Samanta, Gautam - Preservation of Arsenic Species. At find-more-books.com you can find used, antique and new books, COMPARE results and immediately PURCHASE your selection at the best price. 9781843399698
The thesis deals with an investigation on calix[4] based receptors, namely calix[4]pyrrole and calix[4]arene derivatives and their use in different environmental and medical applications. The work conducted throughout this study addresses three main topics. i) The first topic discusses the ability of meso-octamethylcalix[4]pyrrole, CP to remove arsenite and arsenate anions from natural waters. Sites and nature of interaction of the receptor with the investigated anions using 1H NMR and molecular simulation studies are identified. Optimal environmental conditions led to maximal uptake of the investigated anions by CP, uptake capacity of the receptor and the kinetics of the process for the investigated anions are determined. CP was used to remove arsenic species from real water samples and its efficiency is demonstrated. ii) The second topic is related to the synthesis and structural characterisation of two thioacetamide calix[4]pyrrole derivatives namely, ...
ID A0KYP4_SHESA Unreviewed; 549 AA. AC A0KYP4; DT 12-DEC-2006, integrated into UniProtKB/TrEMBL. DT 12-DEC-2006, sequence version 1. DT 07-JUN-2017, entry version 59. DE SubName: Full=Pyridoxal-dependent decarboxylase {ECO:0000313,EMBL:ABK48913.1}; GN OrderedLocusNames=Shewana3_2686 {ECO:0000313,EMBL:ABK48913.1}; OS Shewanella sp. (strain ANA-3). OC Bacteria; Proteobacteria; Gammaproteobacteria; Alteromonadales; OC Shewanellaceae; Shewanella. OX NCBI_TaxID=94122 {ECO:0000313,EMBL:ABK48913.1, ECO:0000313,Proteomes:UP000002589}; RN [1] {ECO:0000313,Proteomes:UP000002589} RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=ANA-3 {ECO:0000313,Proteomes:UP000002589}; RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., RA Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., RA Pitluck S., Chertkov O., Brettin T., Bruce D., Han C., Tapia R., RA Gilna P., Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N., RA Kim E., Newman D., Salticov C., Konstantinidis K., Klappenback ...
LEE VINING, Mono Co. - After Id managed to descend the steepest part of the 9,945-foot Tioga Pass, loosened fingers that had been cramped tightly around the steering wheel, and quit peering nervously at the yawning abyss on my right, I became aware of a mighty blue-green sweep of salty water before me. [...] several thousand feet above it, I could appreciate its lonely setting, a sharp contrast with the alpine lakes surrounded by meadows and forests that Id just left behind in Yosemite National Park. Besides water, it contains copious amounts of salts, detergents and baking soda. Years of court battles had persuaded the city fathers and mothers of perpetually thirsty Los Angeles to stop, after half a century, from diverting four of five streams that pour down the same slopes on which my elderly car now soared toward the shores of Mono Lake. After checking in at a surprisingly busy motel, grateful Id made reservations, I walked north a few doors to the headquarters of the Mono Lake Committee to
The Nutshell Putative Gay Genes Identified, Questioned A genomic interrogation of homosexuality turns up speculative links between genetic elements and sexual orientation, but researchers say the study is too small to be significant. ...
This report features 5 companies, including Searles Valley Minerals, Rose Mill, Rio Tinto, Yingkou Liaobin Fine Chemical Industry, Eti Maden
HILL, SJ; DAWSON, JB; PRICE, WJ; SHUTTLER, IL; and Tyson, JF, "ATOMIC SPECTROMETRY UPDATE - ADVANCES IN ATOMIC-ABSORPTION AND FLUORESCENCE SPECTROMETRY AND RELATED TECHNIQUES" (1995). JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY. 1084 ...
Bermula dengan ibunya yang dipatuk angsa ketika datang merisik Maimun hinggalah rombongan pengantin yang membawa Maimun telah tersilap ke rumah yang mengadakan kenduri bersunat di kawasan kejiranan rumah Rahman.Tak cukup dengan itu, Rahman terpaksa berhadapan dengan bapa mertuanya, Pak Brahim yang agak alim orangnya, sedangkan Rahman alim-alim kucing sahaja. Pelbagai kisah haru-biru yang berlaku di rumah Pak Brahim setelah Rahman menjadi menantunya. Ikutilah juga kisah ketua marhaban, Hajah Meriam yang terpaksa merempit dengan babi semata-mata ingin ke kenduri potong jambul anak kembar Rahman ...
A Magyar Hospice Alap tv ny arra v llalkozott, hogy betegek s hozz tartoz ik eg szs g gybe vetett bizalm t egy t bb elemb l ll programmal er s tse.
ASV Proton serilerinin termal hassas algılama yüksek çözünürlük metal ve boşluk tespitinde 3D dedektör emsali olmayan dünyada tek üründür.
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This is the miracle of apartheid: it tricks the casual visitor into seeing an affluent, smooth-functioning, white society. The reality of black poverty and oppression is hidden: by zoning and pass-laws that keep blacks out of white areas except when they are working; and by apartheid (separate development) that confines the bulk of the black population to fragments of isolated, barren homeland occupying only 13 per cent of South Africas land area. South Africa is the remarkable product of three centuries of relentless colonialism. Since the first Dutch settlers- the Boers or Afrikaaners- drove the indigenous hunter-gatherers from the lush farmlands of the Cape, blacks have been viciously discriminated against in every aspect of life. The British who took over government from the Dutch East India Company in 1806 defeated the Afrikaaners in the Boer War of 1899-1902 with gold and diamonds as the glittering prizes. Then they set about recruiting a black workforce for the mines. The Afrikaaners ...
Commonly found arsenic species in human urine are AsIII (arsenite), AsV (arsenate), MMA (monomethyl arsenic acid), DMA (dimethylarsinic acid) and AB (arsenobetaine). Evidence has shown that these species vary in toxicity and have the potential to be used as biomarkers for human exposure. For human exposure assessments in areas that have naturally occurring arsenic contaminated sources, or those who live or work near contaminated environmental sites where arsenic has been used, it is important to fully understand what species of arsenic residents are being exposed to in order to grasp the risk of arsenic exposure. Since it is difficult to determine direct human exposures, a swine model was used as a surrogate. Urine samples from these studies were analyzed using high-performance liquid chromatography and inductively coupled plasma mass spectrometry (LCICPMS) to quantitate arsenic species. There was a range of 64-74% DMA determined in swine urine samples for all test soils where a range of 60-75% ...
The influence of ethylenediaminetetraacetic acid (EDTA) and chemical species on arsenic accumulation in aquatic floating macrophyte Spirodela polyrhiza L. (duckweed) was investigated. The uptake of inorganic arsenic species (arsenate; As(V) and arsenite; As(III)) into the plant tissue and their adsorption on iron plaque of plant surfaces were significantly (p,0.05) higher than those of organic species (monomethylarsonic acid (MMAA) and dimethylarsinic acid (DMAA)). The addition of EDTA to the culture media increased the uptake of As(V) and As(III) into the plant tissue though the MMAA and DMAA uptake were not affected. About 46% of the inorganic arsenic species were desorbed or mobilized from iron plaque by EDTA. Desorption of organic arsenic species was not affected by EDTA addition because the co-precipitation occurs only with inorganic species. Phosphate uptake was not affected by EDTA though its concentration in citrate-bicarbonate-EDTA (CBE)-extract was much higher than that of plant ...
According to recent reports, millions of people across the globe are suffering from arsenic (As) toxicity. Arsenic is present in different oxidative states in the environment and enters in the food chain through soil and water. In the agricultural field, irrigation with arsenic contaminated water, that is, having a higher level of arsenic contamination on the top soil, which may affects the quality of crop production. The major crop like rice (Oryza sativa L.) requires a considerable amount of water to complete its lifecycle. Rice plants potentially accumulate arsenic, particularly inorganic arsenic (iAs) from the field, in different body parts including grains. Different transporters have been reported in assisting the accumulation of arsenic in plant cells; for example, arsenate (AsV) is absorbed with the help of phosphate transporters, and arsenite (AsIII) through nodulin 26-like intrinsic protein (NIP) by the silicon transport pathway and plasma membrane intrinsic protein aquaporins. Researchers and
What is arsenic and where do you find it?. Arsenic is a naturally occurring element that is widely distributed in the earths crust. Arsenic can exist in several oxidation states with other elements as inorganic or organic arsenic. It is a silvery-gray, semimetallic substance that tarnishes in air. Inorganic and organic arsenic compounds are white in color, and have no smell or special taste. Inorganic arsenic occurs naturally in certain types of soils and rock formations. Inorganic arsenic compounds are mainly used as a preservative in pressure-treated wood to make it resistant to rotting and decay. Organic arsenic compounds are used to make insect killers, weed killers, and fungicides.. Who is exposed to arsenic?. Anyone can be exposed to arsenic since low levels of arsenic are present in soil, water, food, and air. People are primarily exposed to arsenic through eating food (fish and shellfish), drinking water, or breathing air containing arsenic. If wells are drilled in areas where naturally ...
bacteria in hospitals and it is resistant to different antibiotics and it has created therapeutic problems for physicians, this study was done to determine the multiple resistance in pseudomonas aeruginosa against antibiotics, arsenate and metals Methods: In this study, 23 strains of P. aeruginosa isolated from clinical samples. They were tested against the antibiotics penicillin groups by Kirby-Bauer test. MIC and MBC of antibiotics and heavy metals [Cadmium, mercury] and arsenate were measured respectively by broth and agar dilution and grown on agar plate methods Findings: In this method, the most and less MIC against heavy metals were cadmium [0.6, 4.9 microg/ml] , mercury ...
Inorganic arsenic contamination of rice is a problem that has plagued rice supplies worldwide because rice is particularly effective at pulling metals out of soil. And it has not helped that millions of pounds of lead-arsenate and calcium-arsenate pesticides have been sprayed across many countries fields and orchards. In the United States especially, calcium arsenate was heavily sprayed on cotton crops, whose fields are highly contaminated with inorganic arsenic which in turn seeps into neighboring rice fields. Is it any surprise, then, that we have an arsenic problem in rice today? We truly do reap what we sow.. Classified as a human carcinogen, arsenic is particularly nasty at higher doses and inorganic arsenic is far worse than organic arsenic. But at very low doses arsenic actually has a hormetic effect, strengthening the organism to which it has been exposed. The CCCF, though, is concerned with levels of inorganic arsenic that will adversely affect human health.. Japan launched the ...
Number of succussion strokes affects effectiveness of ultra-high-diluted arsenic on in vitro wheat germination and polycrystalline structures obtained by droplet evaporation method - Società Italiana di Medicina Antroposofica - Lucietta Betti, Grazia Trebbi, Maria Olga Kokornaczyk, Daniele Nani, Maurizio Peruzzi, Giovanni Dinelli, Paolo Bellavite and Maurizio Brizzi Homeopathy (2016) -, 1- 8 2016 The Faculty of Homeopathy. Published by Elsevier Ltd. All rights reserved.
Banks and Salt found that the protein encoded by this gene ends up in the membrane of the plant cells vacuole. Salt said the protein acts as a pump, moving arsenic into the cells equivalent of a trashcan.. "It stores it away from the cytoplasm so that it cant have an effect on the plant," Salt said.. Banks said understanding how the Pteris vittata functions with arsenic could lead to ways to clean up arsenic-contaminated land.. "Potentially you could take these genes and put them in any organism that could suck the arsenic out of the soil," Banks said.. Salt said rice plants could be modified with the gene to store arsenic in the roots of plants - instead of rice grains - in contaminated paddies.. Banks and Salt found another gene in Pteris vittata that looks almost exactly the same as the one that controls arsenic tolerance. When the fern was exposed to arsenic, the confirmed arsenic-tolerance gene increased its expression while the similar gene did not.. Salt said the gene that regulates ...
This application note demonstrates the ability to measure various arsenic forms in white rice, building upon previous work using HPLC/ICP-MS. The results described demonstrate that the combination of Flexar HPLC and NexION ICP-MS is suitable for the analysis of different forms of arsenic in white rice.
Define antimonite. antimonite synonyms, antimonite pronunciation, antimonite translation, English dictionary definition of antimonite. n an oxyanion of antimony or a salt containing an oxyanion of antimonya mineral from which antimony is obtained
A bid to protect global consumers from naturally occurring arsenic-contaminated rice has been given the go-ahead by Member States, the UN said on Monday.. The initiative is one of many food safety measures covered by an international body known as the Codex Alimentarius Commission.. It was set up in 1963 by the World Health Organization (WHO) and the Food and Agriculture Organization (FAO); its meeting in Geneva now.. WHOs Dr Kazuaki Miyagishima explained to Daniel Johnson that after its adoption by more than 185 Member States, the new Code of Practice gives farmers the tools they need to produce safer rice crops.. Duration: 310". ...
A study was conducted to assess the retention form of arsenic in soil and to evaluate the use of phosphate for releasing it from the soil. In this study, a loam soil was artificially polluted with arsenate at pH 5.5, which is one of the pH values at which maximum arsenic adsorption occurred. The soil was kept for 2.5 months under wet conditions to allow for stabilization. The soil was maintained under aerobic condition and losses of arsenic by volatilization were determined to be minimal. The soil was then sequentially extracted with a series of chemicals to identify the soil fractions in which the arsenic was bound. The percentage of arsenic found in the Fe bound-exchangeable, reducible-residual, Al bound exchangeable, residual, calcium bound exchangeable, and easily exchangeable forms was 31.6, 27.3, 25.2, 5.5, 4.9, and 4.7%, respectively. A batch experiment showed that at 20°C, 80% of the bound arsenic was removed by phosphate in the pH range of 5 to 7. A power function model was found to ...

Sodium Arsenate Manufacturers, Suppliers & Exporters in IndiaSodium Arsenate Manufacturers, Suppliers & Exporters in India

Contact to Sodium Arsenate Exporters in India, Sodium Arsenate Wholesalers, Sodium Arsenate Distributors and Traders from India ... Search Indian Sodium Arsenate Manufacturers and Suppliers Details - ... Deals in Soyabean Oil, Shikakai Oil, Cake Gel, Natural Hair Colors, Fullers Earth Lumps, sodium arsenate, Calcium Caseinate / ... Deals in phospho tungstic acid, diboron tioxide, Sodium Arsenate, pottasium sodium pyrosulfate, ceric nitrate, Sodium Arsenite ...
more infohttp://www.indianyellowpages.com/india/manufacturers/s/sodium-arsenate.htm

Phosphates, Arsenates | SpringerLinkPhosphates, Arsenates | SpringerLink

Pemberton H.E. (1983) Phosphates, Arsenates. In: Minerals of California. Springer, Boston, MA. * DOI https://doi.org/10.1007/ ...
more infohttps://link.springer.com/chapter/10.1007/978-1-4684-6638-6_9

arsenate(2-) (CHEBI:48597)arsenate(2-) (CHEBI:48597)

arsenate(2−) (CHEBI:48597) is a arsenate ion (CHEBI:22629) arsenate(2−) (CHEBI:48597) is conjugate acid of arsenate(3−) (CHEBI: ... arsenate(1−) (CHEBI:48600) is conjugate acid of arsenate(2−) (CHEBI:48597). arsenate(3−) (CHEBI:29125) is conjugate base of ... arsenate(2−) (CHEBI:48597) is conjugate base of arsenate(1−) (CHEBI:48600) ... arsenate(2−) (CHEBI:48597). arsonato group (CHEBI:48440) is substituent group from arsenate(2−) (CHEBI:48597). ...
more infohttp://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:48597

sodium dihydrogen arsenate (CHEBI:77719)sodium dihydrogen arsenate (CHEBI:77719)

... has part arsenate(1−) (CHEBI:48600) sodium dihydrogen arsenate (CHEBI:77719) has role ... CHEBI:77719 - sodium dihydrogen arsenate. Main. ChEBI Ontology. Automatic Xrefs. Reactions. Pathways. Models. ... sodium dihydrogen arsenate (CHEBI:77719) is a inorganic sodium salt (CHEBI:38702) ...
more infohttps://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:77719

Arsenate - WikipediaArsenate - Wikipedia

The arsenate ion is AsO3− 4. An arsenate (compound) is any compound that contains this ion. Arsenates are salts or esters of ... Arsenates are moderate oxidizers, with an electrode potential of +0.56 V for reduction to arsenites. Arsenates occur naturally ... The arsenic atom in arsenate has a valency of 5 and is also known as pentavalent arsenic or As(V). Arsenate resembles phosphate ... Unlike phosphates, arsenates are not lost from a mineral during weathering. Examples of arsenate-containing minerals include ...
more infohttps://en.wikipedia.org/wiki/Arsenate

Calcium arsenate - WikipediaCalcium arsenate - Wikipedia

Calcium arsenate is commonly prepared from disodium hydrogen arsenate and calcium chloride: 2 Na2H[AsO4] + 3 CaCl2 → 4 NaCl + ... Calcium arsenate use is now banned in the UK, and its use is strictly regulated in the United States. It is currently the ... Calcium arsenate is the inorganic compound with the formula Ca3(AsO4)2. A colourless solid, it was originally used as a ... Tartar, H.V.; Wood, L; Hiner, E; A Basic Arsenate of Calcium. J. Am. Chem. Soc. 1924, vol. 46, 809-813. "NIOSH Pocket Guide to ...
more infohttps://en.wikipedia.org/wiki/Calcium_arsenate

Potassium arsenate | KH2AsO4 - PubChemPotassium arsenate | KH2AsO4 - PubChem

Potassium arsenate , KH2AsO4 or K3AsO4 or AsH2KO4 , CID 516881 - structure, chemical names, physical and chemical properties, ...
more infohttps://pubchem.ncbi.nlm.nih.gov/compound/potassium_arsenate

[current-page:url] Properties[current-page:url] Properties

Potassium Titanyl Arsenate KTiOAsO4 bulk & research qty manufacturer. Properties, SDS, Applications, Price. Free samples ... About Potassium Titanyl Arsenate. Potassium Titanyl Arsenate is a crystalline solid used in photo optic applications. American ... Related Applications, Forms & Industries for Potassium Titanyl Arsenate. Arsenates. Glass, Optical & Laser Materials. Research ... All Chemicals & Salts Acetates Aluminides Ammonium Sulfates Antimonides Arsenates Benzoate Bromates Bromides Carbonates ...
more infohttps://www.americanelements.com/potassium-titanyl-arsenate-kta

Skip to PropertiesSkip to Properties

Arsenate FeAsO4 bulk & research qty manufacturer. Properties, SDS, Applications, Price. Free samples program. Term contracts & ... Iron(III) Arsenate Synonyms. iron arsenate; Ferric arsenate; arsenate o firon, ferric; iron(III)arsenate(1:1); Arsenic acid ... About Iron(III) Arsenate. Iron(III) Arsenate is generally immediately available in most volumes. Hydrate or anhydrous forms may ... Arsenate compounds contain the arsenate ion, AsO43-, and are moderately oxidizing salts or esters of arsenic acid that are ...
more infohttps://www.americanelements.com/iron-iii-arsenate-10102-49-5

CDC - NIOSH Pocket Guide to Chemical Hazards -
Calcium arsenate (as As)CDC - NIOSH Pocket Guide to Chemical Hazards - Calcium arsenate (as As)

Calcium salt (2:3) of arsenic acid, Cucumber dust, Tricalcium arsenate, Tricalcium ortho-arsenate [Note: Also see specific ...
more infohttps://www.cdc.gov/niosh/npg/npgd0089.html

Sodium arsenate dibasic heptahydrate - Substance Information - ECHASodium arsenate dibasic heptahydrate - Substance Information - ECHA

Sodium arsenate dibasic heptahydrate. ↓Other names: Regulatory process names [1] IUPAC names [2] ...
more infohttps://echa.europa.eu/substance-information/-/substanceinfo/100.203.001

Sodium arsenate dibasic heptahydrate - Substance Information - ECHASodium arsenate dibasic heptahydrate - Substance Information - ECHA

Sodium arsenate dibasic heptahydrate. Regulatory process names 1 CAS names 1 IUPAC names 1 Other identifiers 4 ...
more infohttps://echa.europa.eu/hr/substance-information/-/substanceinfo/100.203.001

arsC - Arsenate reductase - uncultured Bacillus sp. - arsC gene & proteinarsC - Arsenate reductase - uncultured Bacillus sp. - arsC gene & protein

Arsenate reductaseImported. ,p>Information which has been imported from another database using automatic procedures.,/p> ,p>,a ... tr,I0B8K4,I0B8K4_9BACI Arsenate reductase (Fragment) OS=uncultured Bacillus sp. OX=83428 GN=arsC PE=3 SV=1 ...
more infohttps://www.uniprot.org/uniprot/I0B8K4

The molecular basis of phosphate discrimination in arsenate-rich environments.  - PubMed - NCBIThe molecular basis of phosphate discrimination in arsenate-rich environments. - PubMed - NCBI

3). Phosphate is indispensable and arsenate is toxic, but this extensive similarity raises the question whether arsenate may ... The molecular basis of phosphate discrimination in arsenate-rich environments.. Elias M1, Wellner A, Goldin-Azulay K, Chabriere ... Arsenate and phosphate are abundant on Earth and have striking similarities: nearly identical pK(a) values, similarly charged ... Enzymes that utilize phosphate, for example, have the same binding mode and kinetic parameters as arsenate, and the latters ...
more infohttps://www.ncbi.nlm.nih.gov/pubmed/23034649?dopt=Abstract

Arsenic-Life Bacterium Prefers Phosphate Over..."Arsenic-Life" Bacterium Prefers Phosphate Over...

This doesnt mean that the arsenate doesnt get into the bacteria, it just shows that the bacterium has evolved to extract ... "Arsenic-Life" Bacterium Prefers Phosphate Over Arsenate TOPICS:ArsenicBacteriumGFAJ-1Molecular BiologyPhosphorousProtein ... One protein that was derived from GFAJ-1 could do so at arsenate excesses of up to 4,500-fold over phosphate. ... The threshold for when "discrimination" broke down was when 50% of the proteins ended up bound to arsenate, indicating that the ...
more infohttps://scitechdaily.com/arsenic-life-bacterium-prefers-fr-phosphate-over-arsenate/

NIOSHTIC-2  Publications Search - 20027922 - Sodium arsenate heptahydrate - developmental toxicity in intact Drosophila...NIOSHTIC-2 Publications Search - 20027922 - Sodium arsenate heptahydrate - developmental toxicity in intact Drosophila...

... sodium arsenate heptahyrdrate (SAH; CAS 7631-89-2), a documented animal teratogen and developmental toxicant, was evaluated. ... Arsenates; Sodium-compounds; Bioassays; Toxins; Teratogens; Teratology; Teratogenesis; Laboratory-animals; Animals; Animal- ... To further characterized the Drosophila bioassay as a screen to detect developmental toxicants, sodium arsenate heptahyrdrate ( ...
more infohttps://www.cdc.gov/niosh/nioshtic-2/20027922.html

Arsenate Retention by Epipsammic Biofilms Developed on Streambed Sediments: Influence of PhosphateArsenate Retention by Epipsammic Biofilms Developed on Streambed Sediments: Influence of Phosphate

Arsenate could enter cells through phosphate-transporting systems [51]. Arsenate bioaccumulation and biouptake in green algae ... Influence of Phosphorus Presence on Arsenate Sorption Process. To assess the influence of P presence on arsenate sorption, ... arsenate and arsenite are present as oxyanions (such as and ) and as neutral aqueous species (H3AsO3), respectively [8]. ... Arsenate Retention by Epipsammic Biofilms Developed on Streambed Sediments: Influence of Phosphate. D. M. Prieto,1 R. Devesa- ...
more infohttps://www.hindawi.com/journals/bmri/2013/591634/

Copper arsenate - toxicity, ecological toxicity and regulatory informationCopper arsenate - toxicity, ecological toxicity and regulatory information

Lead arsenate. View. View. View. Herbicide, Insecticide, Rodenticide. No. Yes. 1327-31-7. Related. 3,15. Lead arsenate, basic. ... Zinc arsenate. View. View. View. Herbicide, Insecticide, Rodenticide. No. Yes. 28837-97-0. Related. 3,15. Zinc arsenite. View. ... Copper arsenate Copper-chrome-arsenic Illinois EPA list. Keith list. Colborn list. Benbrook list. Danish Inert list. EU list. ... Copper arsenate Copper-chrome-arsenic WHO Acute Hazard. TRI Acute Hazard. Material Safety Data Sheets. Acute rating from U.S. ...
more infohttp://www.pesticideinfo.org/Detail_Chemical.jsp?Rec_Id=PC36553

ARTHURITE (Hydrated Copper Iron Arsenate Phosphate Sulfate Hydroxide)ARTHURITE (Hydrated Copper Iron Arsenate Phosphate Sulfate Hydroxide)

Chemistry: CuFe2(AsO4, PO4, SO4)2 - 4H2O, Hydrated Copper Iron Arsenate Phosphate Sulfate Hydroxide ... Arthurite (Hydrated Copper Iron Arsenate Phosphate Sulfate Hydroxide) *. Earlshannonite. (Hydrated Manganese Iron Phosphate ... hydrated iron arsenates and phosphates with a general formula of XFe2(AO4)2(O, OH)2 - 2H2O The X in the formula can be either ... Percentage whys, the arsenate anion dominates in natural specimens, but all anions are usually present in the same specimen. ...
more infohttp://www.galleries.com/Arthurite

Convert moles Sodium Arsenate to kilomol - Conversion of Measurement UnitsConvert moles Sodium Arsenate to kilomol - Conversion of Measurement Units

1 moles Sodium Arsenate = 1 kilomol using the online calculator for metric conversions. ... We couldnt find a conversion between moles Sodium Arsenate and kilomol Do a quick conversion: ... Convert moles Sodium Arsenate to kilomol. Please enable Javascript to use the unit converter ... Error: We couldnt find a conversion between moles Sodium Arsenate and kilomol ...
more infohttps://www.convertunits.com/from/moles+Sodium+Arsenate/to/kilomol

Sodium hydrogen arsenate heptahydrate (Na2HAsO4 7(H2O))Sodium hydrogen arsenate heptahydrate (Na2HAsO4 7(H2O))

X-Ray data set: 1SCF MERS=(1,1,1) GNORM=4 Sodium hydrogen arsenate heptahydrate (NaH2AsO4 7(H2O)) Na 0.00000000 +1 0.00000000 + ... Optimized PM6 data set: PM6 MERS=(1,1,1) GNORM=4 Sodium hydrogen arsenate heptahydrate (NaH2AsO4 7(H2O)) Na -2.26821202 +1 ... Optimized PM7 data set: MERS=(1,1,1) GNORM=4 Sodium hydrogen arsenate heptahydrate (NaH2AsO4 7(H2O)) Na -0.36489181 +1 ... 1059 Sodium hydrogen arsenate heptahydrate (Na2HAsO4 7(H2O)) (Previous) Oxonium hexafluoroarsenate(V) (AsF6 (H3O)) (ICSD 61236) ...
more infohttp://openmopac.net/PM7_Accuracy/data_solids/Sodium_hydrogen_arsenate_heptahydrate__Na2HAsO4_7_H2O___jmol.html

Chemical Database: Iron(III) arsenate (1:1) ==| Isobutyric acid, isopropy (EnvironmentalChemistry.com)Chemical Database: Iron(III) arsenate (1:1) ==| Isobutyric acid, isopropy (EnvironmentalChemistry.com)

... arsenate (1:1) through Isobutyric acid, isopropy with links to more detailed information for each chemical. ... Iron(III) arsenate (1:1) ==, Isobutyric acid, isopropy. *Iron(III) arsenate (1:1) *Iron(III) cation*Iron(III) chloride*Iron(III ... arsenate (1:1) ==, Isobutyric acid, isopropy (EnvironmentalChemistry.com),/a,- Listing of chemicals Iron(III) arsenate (1:1) ... Chemical Database - Iron(III) arsenate (1:1) ==, Isobutyric acid, isopropy. EnvironmentalChemistry.com. 1995 - 2019. Accessed ...
more infohttps://environmentalchemistry.com/yogi/chemicals/sl/Iron%28III%29%A0arsenate%A0%281%C2%A71%29%7CIsobutyric%A0acid,%A0isopropy.html

Absence of Detectable Arsenate in DNA from Arsenate-Grown GFAJ-1 Cells | ScienceAbsence of Detectable Arsenate in DNA from Arsenate-Grown GFAJ-1 Cells | Science

Arsenate in bonds that were stable to spontaneous hydrolysis should be detectable as free arsenate, arsenate-containing ... no arsenate, 3.5 μM phosphate; +As/-P: 40 mM arsenate, 3.5 μM phosphate; -As/+P: no arsenate, 1500 μM phosphate; +As/+P: 40 mM ... its arsenate analog deoxyadenosine-arsenate (dAMA; m/z = 374.0087 ± 5 ppm). DNA from arsenate-grown GFAJ-1 cells (+As/-P washed ... Although traces of arsenate (or a contaminant of mass similar to that of arsenate) were found in several fractions of the CsCl ...
more infohttps://science.sciencemag.org/content/337/6093/470?ijkey=746367a843e7fc27923cceea885c92442d11784b&keytype2=tf_ipsecsha

Sodium arsenate Global Market and Forecast Research : ReportsnReportsSodium arsenate Global Market and Forecast Research : ReportsnReports

65 Pages Report] Check for Discount on Sodium arsenate Global Market and Forecast Research report by ChemReport. DescriptionWe ... Major end users of Sodium arsenate Potential users of Sodium arsenate The main trading companies of Sodium arsenate List of ... Sodium arsenate Global Market and Forecast Research Table of Contents Part 1: General Information of Sodium arsenate Chapter 1 ... 2.2 Construction of Industry Chain of Sodium arsenate Chapter 3: End User of Sodium arsenate List of Tables Manufacturers and ...
more infohttp://www.reportsnreports.com/reports/684332-sodium-arsenate-global-market-and-forecast-research.html
  • The findings suggest that the bacteria may partially incorporate arsenate in place of phosphate in some biomolecules, including DNA, However, these claims were immediately debated and critiqued in correspondence to the original journal of publication, and have since come to be widely disbelieved. (wikipedia.org)
  • Because GFAJ-1 grew in -P medium only when arsenate was provided, and because substantial amounts of arsenate were detected in subcellular fractions, growth was attributed to the use of arsenate in place of phosphate. (sciencemag.org)
  • A typical composition is 80-85% of Ca3(AsO4)2 a basic arsenate probably with a composition of 4CaO.As2O5 together with calcium hydroxide and calcium carbonate. (wikipedia.org)
  • isolated strain GFAJ-1 from the arsenic-rich sediments of California's Mono Lake by its ability to grow through multiple subculturings in artificial Mono Lake medium AML60 that lacked added phosphate but had high concentrations of arsenate (+As/-P condition) ( 1 ). (sciencemag.org)
  • Past use of lead arsenate insecticides has resulted in elevated concentrations of lead (Pb) and arsenic (As) in topsoils of many existing and former deciduous tree fruit orchard sites throughout the world. (springer.com)
  • Enzymes that utilize phosphate, for example, have the same binding mode and kinetic parameters as arsenate, and the latter's presence therefore decouples metabolism. (nih.gov)
  • The enzymes involved are known as arsenate reductases. (wikipedia.org)
  • Potassium Titanyl Arsenate is a crystalline solid used in photo optic applications. (americanelements.com)
  • Potassium titanyle arsenate (KTiOAsO4), or KTA, is a nonlinear optical crystal for Optical Parametric Oscillation (OPO) application. (eksmaoptics.com)
  • Arsenate and phosphate are abundant on Earth and have striking similarities: nearly identical pK(a) values, similarly charged oxygen atoms, and thermochemical radii that differ by only 4% (ref. 3). (nih.gov)
  • However, we have found that arsenate does not contribute to growth of GFAJ-1 when phosphate is limiting and that DNA purified from cells grown with limiting phosphate and abundant arsenate does not exhibit the spontaneous hydrolysis expected of arsenate ester bonds. (sciencemag.org)
  • Sub-ångström-resolution structures of Pseudomonas fluorescens PBP with both arsenate and phosphate show a unique mode of binding that mediates discrimination. (nih.gov)
  • The scientists have discovered how the bacteria discriminate between nearly identical molecules of phosphate and arsenate. (scitechdaily.com)
  • This doesn't mean that the arsenate doesn't get into the bacteria, it just shows that the bacterium has evolved to extract phosphate under almost any circumstances. (scitechdaily.com)
  • Some species of bacteria obtain their energy by oxidizing various fuels while reducing arsenates to form arsenites. (wikipedia.org)
  • In 2008, bacteria were discovered that employ a version of photosynthesis with arsenites as electron donors, producing arsenates (just like ordinary photosynthesis uses water as electron donor, producing molecular oxygen). (wikipedia.org)
  • The researchers conjectured that historically these photosynthesizing organisms produced the arsenates that allowed the arsenate-reducing bacteria to thrive. (wikipedia.org)
  • In 2010, a team at NASA's Astrobiology Institute cultured samples of arsenic-resistant GFAJ-1 bacteria from Mono Lake, using a medium high in arsenate and low in phosphate concentration. (wikipedia.org)
  • A strain of Halomonas bacteria, GFAJ-1, has been claimed to be able to use arsenate as a nutrient when phosphate is limiting and to specifically incorporate arsenic into its DNA in place of phosphorus. (sciencemag.org)
  • The threshold for when "discrimination" broke down was when 50% of the proteins ended up bound to arsenate, indicating that the ability to discriminate had been overwhelmed. (scitechdaily.com)
  • Furthermore, mass spectrometry showed that this DNA contains only trace amounts of free arsenate and no detectable covalently bound arsenate. (sciencemag.org)
  • Absence of Detectable Arsenate in DNA from Arsenate-Grown GFAJ-1 Cells. (wikipedia.org)
  • We have now tested this report by culturing GFAJ-1 cells supplied by the authors ( 1 ) and by analyzing highly purified DNA from phosphate-limited cells grown with and without arsenate. (sciencemag.org)
  • reported that GFAJ-1 cells grew very slowly in AML60 medium (doubling time ~12 hours) and that, when phosphate was not added to the medium, cells failed to grow unless arsenate (40 mM) was provided ( 1 ). (sciencemag.org)
  • Arsenates are moderate oxidizers, with an electrode potential of +0.56 V for reduction to arsenites. (wikipedia.org)
  • Specifically, chelating resins loaded with transition metal cations have shown potential for use in arsenate remediation. (bl.uk)
  • The experimental results indicate that use of PO 4 -containing fertilizers on lead arsenate-contaminated soils has the potential to greatly enhance downward movement of soil As. (springer.com)
  • An arsenate sorbent was prepared by immobilising a phenolate di-zinc(II) complex onto a polystyrene resin. (bl.uk)