Dump Site
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Multi-stage dumping sequence - a feasible waste management alternative for open pit mining
Abstract Waste management and environmental aspects are progressively gathering attention in the mining industry. Mine planners must deal with increasingly complex tasks to balance between ore block schedules, waste disposal, operational cost and environmental reclamation. The mine incomes are generally related to mining and processing of the ore, thus most
REM, Int. Eng. J.. Publicado em: 2021-06
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2. Characteristics of a β-1,4-D endoglucanase from Trichoderma virens wholly applied in a palm-fruit husk-based diet for poultry layers
The characteristics of an endoglucanase produced by a Trichoderma virens strain T9 newly isolated from a palm-fruit husk dump site, its physiological characteristics and enzyme production were studied. Whole cells of the depolymerizing-enzyme producing T. virens were applied to palm-fruit husk and bird performance characteristics when employed as poultry die
Braz. J. Microbiol.. Publicado em: 2012-12
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3. Avaliação da qualidade da água do Córrego Sombrio a jusante do depósito de resíduos sólidos urbanos de Ponte Nova MG / Evaluation of water quality of the Sombrio Creek downstream of urban solid waste disposal of Ponte Nova - MG
A disposição final de resíduos sólidos urbanos em áreas inadequadas, como lixões, representa um grande risco para a qualidade ambiental e para a saúde pública. Dessa maneira, o presente trabalho objetivou avaliar a qualidade da água superficial do entorno do lixão de Ponte Nova MG, em três pontos no Córrego Sombrio: a jusante do lixão, em uma na
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2011
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4. Effects of Pharmaceutical Wastes on Microbial Populations in Surface Waters at the Puerto Rico Dump Site in the Atlantic Ocean
A series of cruises during 1979 and 1980 to the pharmaceutical dump site located 64 km north of Arecibo, Puerto Rico, in the Atlantic Ocean, was carried out to evaluate effects of wastes on the ecology of the microflora of surface waters of the dump site. In addition to bacteriological monitoring of the waste plume created by the release of wastes from the d
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5. Asn177 in Escherichia coli thymidylate synthase is a major determinant of pyrimidine specificity.
The substrate preference of recombinant Escherichia coli thymidylate synthase (TS) has been altered from 2'-deoxyuridylate (dUMP) to 2'-deoxycytidylate (dCMP) by site-directed mutagenesis of the codon for Asn177, which was changed to aspartic acid. The side-chain amide of Asn177 forms hydrogen bonds with O4 and N3 of dUMP bound to the crystalline enzyme [Mon
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6. Promotion of purine nucleotide binding to thymidylate synthase by a potent folate analogue inhibitor, 1843U89.
A folate analogue, 1843U89 (U89), with potential as a chemotherapeutic agent due to its potent and specific inhibition of thymidylate synthase (TS; EC 2.1.1.45), greatly enhances not only the binding of 5-fluoro-2'-deoxyuridine 5'-monophosphate (FdUMP) and dUMP to Escherichia coli TS but also that of dGMP, GMP, dIMP, and IMP. Guanine nucleotide binding was f
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7. Generation of single-nucleotide repair patches following excision of uracil residues from DNA.
The extent and location of DNA repair synthesis in a double-stranded oligonucleotide containing a single dUMP residue have been determined. Gently prepared Escherichia coli and mammalian cell extracts were employed for excision repair in vitro. The size of the resynthesized patch was estimated by restriction enzyme analysis of the repaired oligonucleotide. F
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8. Heavy-Metal and Antibiotic Resistance in the Bacterial Flora of Sediments of New York Bight
The New York Bight extends seaward some 80 to 100 miles (ca. 129 to 161 km) from the Long Island and New Jersey shorelines to the edge of the continental shelf. Over 14 × 106 m3 of sewage sludge, dredge spoils, acid wastes, and cellar dirt are discharged into this area each year. Large populations of Bacillus sp. resistant to 20 μg of mercury per ml were o
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9. Amino acids in the dihydrofolate reductase-thymidylate synthase gene of Plasmodium falciparum involved in cycloguanil resistance differ from those involved in pyrimethamine resistance.
Cycloguanil, the active metabolite of the antimalarial drug proguanil, is an inhibitor of dihydrofolate reductase as is another antimalarial, pyrimethamine. Its use has been limited by the rapid development of resistance by parasites around the world. We have determined the cycloguanil- and pyrimethamine-sensitivity status of 10 isolates of Plasmodium falcip
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10. Sequence and expression of the dCMP deaminase gene (DCD1) of Saccharomyces cerevisiae.
The dCMP deaminase gene (DCD1) of Saccharomyces cerevisiae has been isolated by screening a Sau3A clone bank for complementation of the dUMP auxotrophy exhibited by dcd1 dmp1 haploids. Plasmid pDC3, containing a 7-kilobase (kb) Sau3A insert, restores dCMP deaminase activity to dcd1 mutants and leads to an average 17.5-fold overproduction of the enzyme in wil
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11. Effect of dredge spoil deposition on fecal coliform counts in sediments at a disposal site.
The most-probable-number of fecal coliforms in sediments was monitored at the New London dump site in Long Island Sound during the deposition of dredge spoil from the Thames River. Although the geometric mean for fecal coliforms at five stations in the river was 14,000/100 ml before dredging commenced, the deposition of this material did not increase the inc
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12. X-ray analysis of a complex of Escherichia coli uracil DNA glycosylase (EcUDG) with a proteinaceous inhibitor. The structure elucidation of a prokaryotic UDG.
Uracil-DNA glycosylase (UDG), a key highly conserved DNA repair enzyme involved in uracil excision repair, was discovered in Escherichia coli . The Bacillus subtilis bacteriophage, PBS-1 and PBS-2, which contain dUMP residues in their DNA, express a UDG inhibitor protein, Ugi which binds to UDG very tightly to form a physiologically irreversible complex. The