نتایج جستجو برای: sodium azide
تعداد نتایج: 190553 فیلتر نتایج به سال:
Flow cytometry is set to become the standard method for enumerating prokaryotes and viruses in marine samples. However, the samples need to be flash-frozen in liquid nitrogen directly after aldehyde fixation. Because liquid nitrogen may not always be available, we tested the potential of sodium azide as a preservative for prokaryotes and viruses in marine samples as a possible alternative. For ...
Although Keilin and Hartree (1934) and Blaschko (1935) have shown that sodium azide inhibits catalase derived from animal tissue, there is no information about its action on bacterial catalase. It seemed therefore desirable to make a quantitative study of the effects of sodium azide on catalase derived from this source. Since peroxides are metabolic products of many organisms, the inhibition of...
A microwave-assisted three-component protocol involving N-1 alkylation of 2-alkynylindoles with epichlorohydrin, ring opening of the epoxide with sodium azide, and an intramolecular Huisgen azide-internal alkyne 1,3-dipolar cycloaddition domino sequence has been described. The efficacy of the methodology has been demonstrated by treating various 2-alkynylindoles (aromatic/aliphatic) with epichl...
An experimentally simple sequential one-pot RuAAC reaction, affording 1,5-disubstituted 1H-1,2,3-triazoles in good to excellent yields starting from an alkyl halide, sodium azide, and an alkyne, is reported. The organic azide is formed in situ by treating the primary alkyl halide with sodium azide in DMA under microwave heating. Subsequent addition of [RuClCp*(PPh(3))(2)] and the alkyne yielded...
Sodium azide poisoning is rare (~50 case reports) but can be quickly fatal. A systematic review reported the fatal dose in humans to be over 10 mg/kg1. A 69 year-old female was admitted to our hospital for voluntary sodium azide poisoning. She ingested a massive dose of a soup spoon (15 g) of pure sodium azide powder with intention to commit suicide without any co-intoxication. Within minutes...
EVALUATION OF THE PROTECTIVE ROLE HYDROALCOHOLIC EXTRACT GINGER AND N-ACETYLCYSTEINE ON GENETIC DISORDER CAUSED BY SODIUM AZIDE HUMAN BLOOD LYMPHOCYTES MICRONUCLEUS METHOD
Sodium azide activated soluble rat liver guanylate cyclase but not crude preparations from rat heart or bovine lung. Mixing supernatant fractions from liver preparations with those from heart or lung resulted in an inhibition of sodium azide activation. The inhibitory activity was nondialyzable, heat-labile, and resistant to trypsin treatment. Chromatography of heart or lung supernatant prepara...
The possibility of obtaining sialon in the SHS-Az mode (self-propagating high-temperature synthesis using sodium azide) from systems "silicon dioxide – azide aluminum halogenide silicon" is viewed. phase composition and combustion products are analyzed average particle size determined. It was found that particles a product were combined into agglomerates. plate-like 300...350 nm, equiaxed 120.....
Sodium azide, a chemical mutagen has become important tool to enhance agronomic traits of crop plants. It is being used to produce resistance in various susceptible crops to improve their yield and quality traits against harmful pathogens. There are several mutagens available for crop improvement and each mutagen has its important role as positive or negative effects on crops. Sodium azide crea...
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