Melamine
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Can active surveillance provide a rapid response to an emerging child health issue? The melamine example
Pulsus Group Inc.
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14. THE MECHANISM OF CHEMICAL MUTAGENESIS. I. KINETIC STUDIES ON THE ACTION OF TRIETHYLENE MELAMINE (TEM) AND AZASERINE*
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15. Production of a new bacterial virus by prolonged growth of lysogenic E. coli cultures in the presence of triethylene melamine.
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16. Cloning and analysis of s-triazine catabolic genes from Pseudomonas sp. strain NRRLB-12227.
Pseudomonas sp. strain NRRLB-12227 degrades the s-triazine melamine by a six-step pathway which allows it to use melamine and pathway intermediates as nitrogen sources. With the plasmid pLG221, mutants defective in five of the six steps of the pathway were generated. Tn5-containing-EcoRI fragments from these mutants were cloned and identified by selection fo
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17. Enzymatic Degradation of Chlorodiamino-s-Triazine
2-Chloro-4,6-diamino-s-triazine (CAAT) is a metabolite of atrazine biodegradation in soils. Atrazine chlorohydrolase (AtzA) catalyzes the dechlorination of atrazine but is unreactive with CAAT. In this study, melamine deaminase (TriA), which is 98% identical to AtzA, catalyzed deamination of CAAT to produce 2-chloro-4-amino-6-hydroxy-s-triazine (CAOT). CAOT
American Society for Microbiology.
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18. Atrazine chlorohydrolase from Pseudomonas sp. strain ADP: gene sequence, enzyme purification, and protein characterization.
Pseudomonas sp. strain ADP metabolizes atrazine to carbon dioxide and ammonia via the intermediate hydroxyatrazine. The genetic potential to produce hydroxyatrazine was previously attributed to a 1.9-kb AvaI DNA fragment from strain ADP (M. L. de Souza, L. P. Wackett, K. L. Boundy-Mills, R. T. Mandelbaum, and M. J. Sadowsky, Appl. Environ. Microbiol. 61:3373
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19. Degradation of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) by Stenotrophomonas maltophilia PB1.
A mixed microbial culture capable of metabolizing the explosive RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine) was obtained from soil enrichments under aerobic and nitrogen-limiting conditions. A bacterium, Stenotrophomonas maltophilia PB1, isolated from the culture used RDX as a sole source of nitrogen for growth. Three moles of nitrogen was used per mole of
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20. Purification and Characterization of an Inducible s-Triazine Hydrolase from Rhodococcus corallinus NRRL B-15444R
The widespread use and relative persistence of s-triazine compounds such as atrazine and simazine have led to increasing concern about environmental contamination by these compounds. Few microbial isolates capable of transforming substituted s-triazines have been identified. Rhodococcus corallinus NRRL B-15444 has previously been shown to possess a hydrolase
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21. The atzB gene of Pseudomonas sp. strain ADP encodes the second enzyme of a novel atrazine degradation pathway.
We previously reported the isolation of a 21.5-kb genomic DNA fragment from Pseudomonas sp. strain ADP, which contains the atzA gene, encoding the first metabolic step for the degradation of the herbicide atrazine (M. de Souza, L. P. Wackett, K. L. Boundy-Mills, R. T. Mandelbaum, and M. J. Sadowsky, Appl. Environ. Microbiol. 61:3373-3378, 1995). In this stud