Liquid Ammonia
Mostrando 1-12 de 69 artigos, teses e dissertações.
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1. In vitro evaluation of the association of chitosan and cashew nut shell liquid as additives for ruminants
RESUMO Objetivou-se avaliar no presente trabalho a digestibilidade in vitro de nutrientes de diferentes dietas com a adição de quitosana (Q), líquido da casca da castanha de caju (LCC) e a associação entre Q e LCC. Os tratamentos utilizados foram constituídos de 4 dietas (relação volumoso:concentrado, 100:0, 50:50, 40:60 e 20:80) associadas com 4 adi
Rev. bras. saúde prod. anim.. Publicado em: 11/11/2019
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2. Nitrificação de águas amarelas em leito percolante de areia
RESUMO O esgotamento sanitário ecológico conscientiza a população sobre a importância do reúso da água com maior eficiência e do uso de efluentes de sistemas de tratamento descentralizados. O presente trabalho descreve os resultados da nitrificação de águas amarelas em reator biológico com a utilização de materiais simples, por exemplo, a areia
Eng. Sanit. Ambient.. Publicado em: 26/08/2019
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3. SELECTIVE SYNTHESIS OF PEG-MONOESTER USING CESIUM HETEROPOLY ACID AS HETEROGENEOUS CATALYST
Esterification of oleic acid with polyethylene glycol 600 (PEG-600) to produce polyethylene glycol monooleate (PEG-monooleate) and polyethylene glycol dioleate (PEG-dioleate) as by-product has been studied in the presence of heterogeneous acid catalysts, i.e. cesium heteropoly acid (Cs HPA). The results are compared with those obtained from a classical homog
Quím. Nova. Publicado em: 2017-06
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4. LEACHING Zn FROM THE LOW-GRADE ZINC OXIDE ORE IN NH3-H3C6H5O7-H2O MEDIA
Abstract In this research, the effect of different citric acid concentrations, ammonia concentration, temperature, leaching time, stirring speed and liquid-to-solid ratio on the zinc leaching from low-grade zinc oxide ore in a NH3-H3C6H5O7-H2O system were studied. The results showed that the zinc leaching rate is only 4.7% when the citric acid concentration
Braz. J. Chem. Eng.. Publicado em: 2016-12
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5. Aerobic cyanide degradation by bacterial isolates from cassava factory wastewater
Ten bacterial strains that utilize cyanide (CN) as a nitrogen source were isolated from cassava factory wastewater after enrichment in a liquid media containing sodium cyanide (1 mM) and glucose (0.2% w/v). The strains could tolerate and grow in cyanide concentrations of up to 5 mM. Increased cyanide levels in the media caused an extension of lag phase in
Braz. J. Microbiol.. Publicado em: 2015-09
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6. Modeling of a three-phase reactor for bitumen-derived gas oil hydrotreating
A three-phase reactor model for describing the hydrotreating reactions of bitumen-derived gas oil was developed. The model incorporates the mass-transfer resistance at the gas-liquid and liquid-solid interfaces and a kinetic rate expression based on a Langmuir-Hinshelwood-type model. We derived three correlations for determining the solubility of hydrogen (H
Brazilian Journal of Chemical Engineering. Publicado em: 2012-03
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7. Intake, digestibility, rumen characteristics and microbial protein synthesis efficiency in bovine and bubaline fed sugar cane silage with additives
Intake and total and ruminal digestibility, ruminal characteristics and microbial synthesis efficiency in bovine and bubaline fed sugar cane silages treated with microbial additive Lactobacillus buchneri (inoculate) and the addition of: cassava byproduct meal at 250 g/kg; soybean hulls at 250 g/kg; and urea at 33 g/kg, in natural matter were evaluated. The f
Revista Brasileira de Zootecnia. Publicado em: 2012-03
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8. Recuperação da amônia liberada no processo de "air stripping" aplicado ao tratamento do lixiviado de aterros sanitários / Recovery of ammonia released from air stripping process applied to sanitary landfill leachate treatment
Sanitary landfill leachate is a pollutant liquid effluent mainly due to its high ammonia concentration. Its treatment is necessary due to environmental and labour legislation requirements, besides prevention of environmental impacts of leachate release in water bodies. This research proposes ammonia removal from leachate by air stripping process, which trans
Publicado em: 2010
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9. Transporte de nutrientes e bactÃrias por escoamento superficial devido a aplicaÃÃo de Ãgua residuÃria da suinocultura no solo
The swine activity is a characteristic of the south region of Brazil, and in the State of Parana it has been of outstanding economical and social importance. However, this activity presents low environmental quality due to the generation of great volumes of liquid residues with elevated pollutant power due to his physical, chemical and microbiological charac
Publicado em: 2010
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10. Análise da variação da concentração de amônia, dos aminoácidos alanina e glutamina e do dipeptídeo alanil-glutamina no meio de cultura de embriões humanos e os efeitos na reprodução assistida / Analysis of the variation of the concentrations of ammonium, alanine, glutamine, and alanyl-glutamine in culture medium of human embryos and the effects on assisted reproduction / Analysis of the variation of the concentrations of ammonium, alanine, glutamine, and alanyl-glutamine in culture medium of human embryos and the effects on assisted reproduction / Análise da variação da concentração de amônia, dos aminoácidos alanina e glutamina e do dipeptídeo alanil-glutamina no meio de cultura de embriões humanos e os efeitos na reprodução assistida
Objective: to verify the relations between culture media concentrations of ammonia, alanine, glutamine, and alanyl-glutamine and embryo quality, pregnancy, and type of hormonal stimulation. Methods: a prospective case-control study was carried out including 62 embryos from 20 women submitted to assisted reproduction at the Sao Paulo Federal University. Inclu
Publicado em: 2009
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11. Caracterização do conteúdo de fossas e tanques sépticos na cidade de Natal
Only 32% of the population of Natal is attended by sewage, while the remaining population use pits and septic tanks. The characterization of the contents of septic tanks and pits contributes to the performance of such system and may guide the decision on treatment of these contents. The main of this research is to characterize the contents of interior reside
Publicado em: 2009
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12. Estratégia alimentar e densidade de estocagem para acarádisco (Symphysodon aequifasciata) / Feeding strategy and stocking density for discus fish (Symphysodon aequifasciata)
Four diets were tested to verify the effect of beef heart as feed enhancer for discus fish, studding the growth, weight gain, survivor, consumption, water quality and economic performance variables. Is was utilized 12 aquariums, distributed in 4 treatments and 3 replications. The treatments were: T1- 100% ration (42%PB); T2- 75% ration and 25% beef heart; T3
Publicado em: 2009