(n.) A compound of arsenic and hydrogen, AsH3, a colorless and exceedingly poisonous gas, having an odor like garlic; arseniureted hydrogen.
Example Sentences:
(1) Higher concentrations of methemoglobin in animals in the 2.500 ppm exposure group (measured after 90 days of exposure) indicated that the rate of oxidation of heme (ferrous to ferric) increased due to exposure to arsine gas.
(2) Arsine and in general airborne arsenic compounds show the main cancer promoting characteristics.
(3) In order to examine possible species differences in response to arsine exposure, multiple inhalation studies consisting of acute (1-day), subacute (14- and 28-day), and subchronic (90-day) exposures to this agent were conducted using three different species of rodents.
(4) Fetuses weighed more than in the control group but other endpoints of developmental toxicity were not affected by arsine exposure.
(5) While the clinical picture suggested arsine or stibine poisoning, preliminary investigation of the plant revealed no obvious source of arsenic, antimony, or hydrogen gas.
(6) Hematocrit values at 24 hr after exposure decreased linearly with increasing arsine concentration in the range 5 to 26 ppmv; the hematocrit of the 26-ppmv group reached 10.5% at 24 hr, compared to 48.4% for control mice.
(7) A 1 g sample is wet washed in a 16 x 150 mm 10 mL volumetric test tube on a programmed heating block with nitric, sulfuric, and perchloric acids at up to 310 degrees C. After treatment with hydrochloric acid and potassium iodide, arsenic is reduced by sodium borohydride to arsine in a simplified continuous flow manifold.
(8) To examine these, we exposed male and female mice to 0.000, 0.025, 0.500 and 2.500 ppm arsine gas for 6 h a day, 5 days a week during a 90-day period.
(9) Concern about semiconductor workers prompted an in-depth study of arsine at the National Institute of Environmental Health Sciences to determine the hematopoietic effects of prolonged exposure to this gas.
(10) Effects on other organs were not observed, suggesting that the hematopoietic system is the primary target for arsine.
(11) At least three times more arsine than dimethylarsine was produced in soil incubated with dimethylarsinate.
(12) The number of live fetuses, mean fetal body weight, and percentages of resorptions or malformations per litter were not affected by arsine exposure.
(13) In most situations where arsine can be formed if antimony is present.
(14) After 5, 15, and 90 days of exposure, blood was collected and routine hematologic profiles were performed to document the effects of arsine gas on peripheral blood.
(15) The National Institute for Occupational Safety and Health (NIOSH) recommends that appropriate workpractices be implemented to reduce the risk of worker exposure to arsine (AsH3) gas.
(16) We drew a conclusion that TM-As is far less an toxic than arsine, most probably due to its in vivo conversion to TMAO.
(17) A series of eight neutral technetium(II)-99m complexes of general formula tr-[99mTcIID2X2]0, where D represents a chelating ditertary phosphine or arsine ligand and X represents a halide or pseudohalide ligand, has been prepared and characterized by HPLC comparisons to the known 99Tc analogs.
(18) This recommendation is based on several reports of worker exposure to arsine resulting in severe toxic effects or death.
(19) Among these arsines, dimethylarsine was mutagenic in WP2 (wild-type; Exc+Rec+) and WP2uvrA (uvrA-; Exc-Rec+), while trimethylarsine was not.
(20) An accuracy investigation, initiated because of conflicting analytical data on the arsenic content for some 24 drinkinig water locations in the Mojave Desert, revealed that interference with the evolution of arsine in the American Public Health Association silver diethyldithiocarbamate method caused either color enhancement or arsine suppression.
Cacodyl
Definition:
(n.) Alkarsin; a colorless, poisonous, arsenical liquid, As2(CH3)4, spontaneously inflammable and possessing an intensely disagreeable odor. It is the type of a series of compounds analogous to the nitrogen compounds called hydrazines.
Example Sentences:
(1) The results indicate that in 10(-3) M sodium cacodylate the binding constant of BAD is 1.8 x 10(3) M-1.
(2) Protein aggregation is dependent on the concentration of background electrolyte since in the range 10-150 mM sodium cacodylate alternative stabilisation of dimeric and trimeric complexes was observed by both NMR and analytical ultracentrifugation.
(3) Yeast cells were fixed for 20 min in cold 1% glutaraldehyde buffered with 50 mM TES buffer to pH 7.0 and then incubated for 80 min with 1.2 mM L-alanyl-L-proline-4-methoxy-2-naphthylamide (Ala-Pro-MNA) or Lys-Pro-MNA as cytochemical substrates plus 0.06% hexazonium p-rosaniline (HPR) buffered with 160 mM cacodylate to pH 7.0.
(4) The two-step method uses cationic cacodylate iron colloid which is substituted with Tween 20 at an OD460 nm = 0.5, followed by Perls' reaction with acid potassium ferrocyanide.
(5) It was noted that the microtubular structure, which could not be demonstrated even by alcian blue or cationic ferric hydroxide colloid stabilized with cacodylate (Fe-CaC), was clearly detected with anti-EMA.
(6) The melting of chromatin was followed in 5 mM sodium-cacodylate buffer (pH 7.0)+1.5-10(-4) M EDTA containing increasing concentrations of urea.
(7) 260, 7619-7627); and (ii) an alpha 2----3 sialyltransferase that was efficiently solubilized by 0.2% Triton X-100 and required divalent metal ions and 0.3% Triton CF-54 for optimal activity at pH 5.9 in cacodylate buffer.
(8) Utilizing morphometry of electron micrographs of nerves of rat fixed with different schedules of fixation it was concluded that: irrespective of the fixative, fixation at low temperature is associated with markedly low densities of microtubules (MT) of myelinated and of unmyelinated fibers; of the various fixatives tested 2% glutaraldehyde in 0.1 M cacodylate buffer without 0.025 M CaCl2 was associated with the highest density of MT of myelinated fibers and the addition of 0.025 M CaCl2 to a 2% glutaraldehyde fixative solution is associated with abnormally low densities of MT in myelinated and unmyelinated fibers.
(9) Tissues were washed in buffer, then stained in medium containing glucose, diaminobenzidine HCl, and dimethylsulfoxide in 0.1 M cacodylate buffer.
(10) The cacodylate molecule is decomposed to As(V) by heating with Mg(NO3)2.6H20; As(V) is then chemically reduced to As(III) and polarographed in 1M HCl supporting electrolyte.
(11) The midpoint was pCa 8.25 for the former protein and 6.80 for the latter protein in 0.1 M KCl, 50 mM Na-cacodylate-HCl (pH 7.0); and pCa 7.90 for the former protein and 6.70 for the latter protein in the presence of 3 mM MgCl2 in the same solvent system.
(12) In each transport mode, the intercellular spaces were measured after immersion in a series of fixatives in which the concentration of buffer (sodium cacodylate) was increased.
(13) We have found that when a buffer utilized for in vitro polymerization of microtubules, i.e., 1 mM guanosine triphosphate, 1 mM MgSO4, 2 mM ethylene glycol bis(beta-aminoethyl ether)-N, N'-tetraacetic acid 100 mM piperazine-N,N'-bis(2-ethanesulfonic acid), pH 6.9 polymerization mix, was used in the glutaraldehyde prefixation regimen instead of classical fixative buffers, i.e., isotonic cacodylate or phosphate buffer, the following features were observed in thin-sections of the cytoplasm of interphase HeLa cells: (a) a greater than 2-fold increase in total microtubule contour length, (b) a 2-fold increase in a number of microtubules greater than or equal to 1 mu long, (c) an enhanced association of microtubules with cytoplasmic organelles, and (d) an increased clustering of 100 A filaments located in a perinuclear region of the cell.
(14) The isolated, maximally vasodilated rat hindquarter preparation was used to determine how fixation of the vascular bed (glutaraldehyde, 2.5% in 0.05 M Na-cacodylate with dextran 40 g X 1-I) affected transcapillary filtration and diffusion events, as well as macromolecular transfer, measured as transport of water (CFC), of small solutes (PS) and of 125I-albumin.
(15) Tissue samples taken from the left auricular myocardium of four pig hearts at 0, 0.5, 1.5, 3.5, 6, 12 and 24 hours post mortem were fixed for 24 hours by immersion in 2.5 per cent cacodylate buffered glutaraldehyde (pH 7.4).
(16) At pH 7.2, 24 degrees C and in 5mM sodium cacodylate buffer solution, this binding increases the lifetime of the diol epoxide by a factor of nearly 3.
(17) While in pure water (cacodylate buffer pH 7.0, NaCl 0.1 M) they are respectively +388 and +265 mV, in 50% dimethylsulfoxide at 25 degrees C they decrease to +112 and +208 mV.
(18) Optimum pH was 6.8 in cacodylate buffer, and Km values were 2 microM for lactotriaosylceramide and 29 microM for UDP-galactose.
(19) Nine pesticides tested by the oral route (bufencarb, cacodylic acid, dialifor, deltamethrin, dicamba, diquat, quintozene, phoxim, pyrazon) and four tested by the dermal route (bufencarb, chlordimeform, dichlofenthion, leptophos) were more toxic to females than to males whereas famphur and 2,4,5-T (oral route) were less toxic to females.
(20) At the end of the time period, the cornea was flooded with 4% glutaraldehyde, buffered with cacodylate, pH 7.4, and kept moist until removed.