Nitroso Compounds Analysis
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Evaluation of the mutagenicity and antimutagenicity of Ziziphus joazeiro Mart. bark in the micronucleus assay
The aim of this study was to evaluate the mutagenicity (clastogenicity/aneugenicity) of a glycolic extract of Ziziphus joazeiro bark (GEZJ) by the micronucleus assay in mice bone marrow. Antimutagenic activity was also assessed using treatments associated with GEZJ and doxorubicin (DXR). Mice were evaluated 24-48 h after exposure to positive (N-nitroso-N-eth
Genet. Mol. Biol.. Publicado em: 2014-06
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2. Desenvolvimento de metodos analiticos para determinação de nitrato, nitrito e n-nitrosaminas em produtos carneos
Nitrosamines are N-nitroso compounds formed in certain foods by the reaction of a nitrosating agent, derived from either nitrite salts or nitrogen oxide, with a substance having an amino group. The majority of nitrosamines tested in animals are carcinogenic, mutagenic, teratogenic and act transplacentally. This work describes analytical methods for the deter
Publicado em: 2004
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3. Microbiota in chagasic megaesophagus / Microbiota no megaesôfago chagásico.
The stasis of saliva and swallowed food in the esophageal lumen of patients with chagasic megaesophagus causes: (1) bacterial overgrowth in the esophageal lumen, (2) recurring pulmonary aspirations and respiratory infections, (3) increased risk of surgical or endoscopic procedures if perforation occurs by the major possibility of contamination, and (4) the d
Publicado em: 2001
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4. Environmental N-Nitroso Compounds: Analysis and Formation
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5. Presence of 1-methyl-1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid, a precursor of a mutagenic nitroso compound, in soy sauce.
After treatment with nitrite, Japanese soy sauce was strongly mutagenic to Salmonella typhimurium TA100 without S9 mixture. Two precursors of the mutagen were isolated from Japanese soy sauce, and these were identified as (-)-(1S,3S)-1-methyl-1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid [(-)-(1S,3S)-MTCA] and its stereoisomer (-)-(1R,3S)-MTCA. After t
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6. Diabetogenic action of streptozotocin: relationship of dose to metabolic response
The relationship between the dose of intravenously administered streptozotocin (a N-nitroso derivative of glucosamine) and the diabetogenic response has been explored by use of the following indices of diabetogenic action: serum glucose, urine volume, and glycosuria, ketonuria, serum immunoreactive insulin (IRI), and pancreatic IRI content. Diabetogenic acti