Nitrous Acid Reduction
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Stimulation of Acidic Reduction of Nitrite to Nitric Oxide by Soybean Phenolics: Possible Relevance to Gastrointestinal Host Defense
This study aimed to evaluate the potential of soybean-promoted acidic nitrite reduction and to correlate this activity with the content of phenolics and with the bactericidal activity againstEscherichia coliO157:H7. Extracts of embrionary axes and cotyledons enriched in phenolics increased •NO formation at acidic pH at values that were 7.1 and 4.5 times hi
Publicado em: 15/06/2013
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2. CinÃtica da reduÃÃo de NOx pelo Ãcido amino sulfÃmico: modelagem e desenvolvimento
Elevated levels of nitrogen oxides (NOX) from flue gases have recently become a major issue in industrial environment. This causes that the laws are becoming each time more demanding. The most employed reduction processes are: absorption by an aqueous acidic solution and catalytic gas-solid reduction. The nitrogen oxides absorbed into water leads to the form
Publicado em: 2006
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3. Desenvolvimento do precesso de reduÃÃo de Ãcido nitroso por Ãcido amino sulfÃmico. Modelagem cinÃtica associada à transferÃncia gÃs-lÃquido
The combustion of organic products, in particular, the natural gas, leads to the generation of nitrogenated oxides (NOx = NO and NO2; N2O) from both sources, the nitrogenous originated from the combustion air and nitrogenated compounds present in the fuel. NOx emissions can damage the human health and environment. They have been contributing widely to the fo
Publicado em: 2003
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4. Characterization of Tn5 mutants deficient in dissimilatory nitrite reduction in Pseudomonas sp. strain G-179, which contains a copper nitrite reductase.
Tn5 was used to generate mutants that were deficient in the dissimilatory reduction of nitrite for Pseudomonas sp. strain G-179, which contains a copper nitrite reductase. Three types of mutants were isolated. The first type showed a lack of growth on nitrate, nitrite, and nitrous oxide. The second type grew on nitrate and nitrous oxide but not on nitrite (N
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5. Identification and analysis of the dissimilatory nitrous oxide reduction genes, nosRZDFY, of Rhizobium meliloti.
The complete nos region essential for dissimilatory nitrous oxide reduction by the endosymbiotic diazotroph Rhizobium meliloti was identified in a cosmid (pYC7) carrying a 10.1-kb EcoRI fragment of the nod megaplasmid. This gene region was localized by Southern hybridization and Tn5 mutagenesis to within 8 kb downstream from the fixGHIS cluster. Nucleotide s
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6. Nitrite Transport in Chloroplast Inner Envelope Vesicles (I. Direct Measurement of Proton-Linked Transport).
Chloroplast inner envelope membrane vesicles that are loaded with the pH-sensitive fluorophore, pyranine, show rapid internal acidification when nitrite is added. Acidification is dependent upon [delta]pH, with the inside of vesicles being alkaline with respect to the outside. The rate of vesicle acidification was directly proportional to the concentration o
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7. Evidence for a 3-O-sulfated D-glucosamine residue in the antithrombin-binding sequence of heparin.
An octasaccharide with high affinity for antithrombin was isolated after partial deaminative cleavage of heparin with nitrous acid. After conversion of the 2,5-anhydro-D-mannose end group to anhydro[1-3H]mannitol, labeled pentasaccharide was released from the octasaccharide by periodate-alkali treatment. Incubation of the pentasaccharide with a recently disc
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8. Adaptation of Denitrifying Populations to Low Soil pH †
Natural denitrification rates and activities of denitrifying enzymes were measured in an agricultural soil which had a 20-year past history of low pH (pH ca. 4) due to fertilization with acid-generating ammonium salts. The soil adjacent to this site had been limed and had a pH of ca. 6.0. Natural denitrification rates of these areas were of similar magnitude
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9. Galactosaminogalactan from cell walls of Aspergillus niger.
A new heteropolysaccharide has been isolated by alkaline extraction of hyphal walls of Aspergillus niger NRRL 326 grown in surface culture. Its composition by weight, as determined by paper and gas chromatography and colorimetric analyses, is 70% galactose, 20% galactosamine, 6% glucose, and 1% acetyl. Two independent experiments have been used to ascertain
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10. Complex-type N-linked oligosaccharides of gp120 from human immunodeficiency virus type 1 contain sulfated N-acetylglucosamine.
The major envelope glycoproteins gp120 and gp41 of human immunodeficiency virus type 1, the causative agent for human AIDS, contain numerous N-linked oligosaccharides. We report here our discovery that N-acetylglucosamine residues within the complex-type N-linked oligosaccharides of both gp120 and its precursor, gp160, are sulfated. When human Molt-3 cells p
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11. Effect of acute ammonia intoxication on cerebral metabolism in rats with portacaval shunts.
Rats were made chronically hyperammonemic by portal-systemic shunting and, 8 wk later, were subjected to acute ammonia intoxication by the intraperitoneal injection of 5.2 mmol/kg of ammonium acetate. In free-ranging animals, ammonia treatment induced a brief period of precoma (10-15 min) that progressed into deep, anesthetic coma lasting for several hours a
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12. TEMPERATURE-SENSITIVE MUTANTS OF BACILLUS SUBTILIS BACTERIOPHAGE SP3 I. : Isolation and Characterization
Nishihara, Mutsuko (University of California, Los Angeles), and W. R. Romig. Temperature-sensitive mutants of Bacillus subtilis bacteriophage SP3. I. Isolation and characterization. J. Bacteriol. 88:1220–1229. 1964.—Twelve temperature-sensitive mutants of Bacillus subtilis bacteriophage SP3 were isolated from a suspension of the wild type treated with ni