Nitroso Compounds
Mostrando 13-24 de 53 artigos, teses e dissertações.
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13. Contribuição a etiopatogenia do cancer do coto gastrico : estudo experimental
The gastric stump cancer is defmed as a carcinoma arising in the remnant stomachafier the gastric resectionperfomedto treat benign diseases. Literature revision of clinic casuistics shows that the occurrence is more frequent afier BILLROTH II reconstruction, in males and patients previously operated for duodenal ulcers. The probability of gastric stump cance
Publicado em: 1994
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14. Relation between gastric histology and gastric juice pH and nitrite and N-nitroso compound concentrations in the stomach after surgery for duodenal ulcer.
Formation of N-nitroso compounds in gastric juice has been implicated in the pathogenesis of cancer in the stomach after operation. Gastric juice was aspirated from 85 subjects: 23 were controls, 51 had previously undergone vagotomy and gastrojejunostomy, and 11 had previously undergone vagotomy and pyloroplasty. The gastric juice samples were analysed for p
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15. Identification of Nitroso Compounds from Biotransformation of 2,4-Dinitrotoluene
The intermediates of microbial transformation of 2,4-dinitrotoluene by a mixed bacterial culture derived from activated sludge were identified as 2-amino-4-nitrotoluene, 4-amino-2-nitrotoluene, 2-nitroso-4-nitrotoluene, and 4-nitroso-2-nitrotoluene. The biotransformation of 2,4-dinitrotoluene occurred only under anaerobic conditions with an exogenous carbon
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16. Prophage Induction in Lysogenic Escherichia coli with N-Nitroso Compounds and Derivatives
Prophage induction in lysogenic Escherichia coli W1709 (ι) was determined for 29 N-nitroso compounds, 13 of their denitrosated derivatives, and 7 hydroxylamino and hydrazino analogues of nitrosamines. Minimal inducing concentrations of 0.1 to 2.0 μg/ml were demonstrated for eight nitrosamidines, and concentrations of 0.5 to 25.0 μg/ml were shown for six n
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17. Induction of endonuclease-mediated apoptosis in tumor cells by C-nitroso-substituted ligands of poly(ADP-ribose) polymerase.
6-Nitroso-1,2-benzopyrone and 3-nitrosobenzamide, two C-nitroso compounds that inactivate the eukaryotic nuclear protein poly(ADP-ribose) polymerase [NAD+:poly(adenosine diphosphate D-ribose) ADP-D-ribosyltransferase, ADPRT, EC 2.4.2.30] at one zinc-finger site, completely suppressed the proliferation of leukemic and other malignant human cells and subsequen
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18. Environmental N-Nitroso Compounds: Analysis and Formation
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19. N-Nitroso compounds: occurrence, biological effects and relevance to human cancer
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20. The relevance of N-nitroso compounds to human cancer: exposure and mechanisms
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21. Chemistry and Biology of N-nitroso Compounds. Cambridge Monographs on Cancer Research
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22. Environmental Health Criteria 5: Nitrates, Nitrites and N-Nitroso Compounds
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23. O-nitroso aldol synthesis: Catalytic enantioselective route to α-aminooxy carbonyl compounds via enamine intermediate
The approach using pyrrolidine enamine as substrate has been studied for this synthesis, and an important catalyst structural feature has been developed. After survey of pyrrolidine-based Brønsted acid catalyst, tetrazole catalyst (3f) was found to be optimal in synthesis of aminooxy carbonyl compounds in high yields, with complete enantioselectivity not on
National Academy of Sciences.
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24. IARC Monographs: The Evaluation of Carcinogenic Risk of Chemicals to Man. Volume 4: Some Aromatic Amines, Hydrazine and Related Substances, N-Nitroso Compounds and Miscellaneous Alkylating Agents, Volume 5: Some Organochlorine Pesticides, Assessment of the Carcinogenicity and Mutagenicity of Chemicals: Report of a WHO Scientific Group