Chromic Oxide
Mostrando 13-24 de 33 artigos, teses e dissertações.
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13. Pitting corrosion resistance of coloured oxide films grown on stainless steel in sulphuric acid in the presence and absence of chromic acid
Neste trabalho foi avaliada a resistência à corrosão por pites de filmes de óxidos coloridos crescidos sobre aço inoxidável AISI 304 em H2SO4 e H2SO4 + CrO3. A morfologia e topografia dos filmes foram examinadas por MEV (microscopia eletrônica de varredura) e AFM (microscopia de força atômica), respectivamente. As caracterizações eletroquímicas f
Journal of the Brazilian Chemical Society. Publicado em: 2010
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14. Efeito do Fornecimento Crônico de Leptina e da Nutrição na Maturação Sexual de Novilhas Zebuínas (Bos taurus indicus) / Effect of Chronic Leptin Administration on Sexual Maturation of Zebu Heifers (Bos taurus indicus)
This study was carried out to evaluate the effects of chronic administration of recombinant ovine leptin (oLeptin) and the energy level of the diet on age, body weight (BW), body condition score (BCS) and body composition at puberty, as well as to evaluate its effects on dominant follicle (DF) development and dry matter (DM) intake. Thirty six Nellore heifer
Publicado em: 2009
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15. Estudos de variações metodológicas na determinação do metabolismo aparente de nutrientes em frangos de corte / Study of methodological variations in apparent nutrients Metabolism determination in broiler chickens
Foi realizado um experimento com a finalidade de apresentar um protocolo preciso, simples, rápido e de baixo custo para determinar os coeficientes de metabolizabilidade dos nutrientes e o valor energético das dietas. Para tal, determinaram-se os CMMS, CMPB e CMEB e EMAn através da comparação de diferentes metodologias de digestibilidade in vivo que incl
Publicado em: 2009
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16. Use of cutin for determining apparent digestibility of diets in horses / Uso da cutina na estimativa da digestibilidade aparente de dietas para eqüinos
This research aimed to compare organic matter digestibility coefficient (OMDC) of diets composed of alfalfa cubes, alfalfa cubes with soybean oil, alfalfa hay and alfalfa hay with soybean oil by total feces collection and use the internal markers cutin and acid detergent lignin (ADL) and the external marker chromic oxide. Four male weanling horses (approxima
Publicado em: 2008
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17. Metodologia otimizada para a determinção de digestibilidade de dietas para camarões marinhos em cultivo / Improved methodology for determination of digestibility in diets for cultured penaeid shrimp
A aqüicultura desenvolveu-se rapidamente nos últimos anos, sendo a carcinicultura um dos segmentos mais lucrativos e crescentes, onde a ração representa o custo mais elevado da produção e a maior fonte de poluição das fazendas de camarão. Nesse contexto, verifica-se a busca por rações de qualidade e novos ingredientes. Assim, o presente trabalho o
Publicado em: 2008
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18. Nutritional evaluation of sugarcane treated with calcium oxide at different times of exposure to cattle / Avaliação nutricional da cana-de-açúcar acrescida de óxido de cálcio em diferentes tempos de amazenamento para bovinos
Were performed 4 experiments aiming evaluate the chemical composition and in vitro and in situ digestive kinetics of sugarcane treated with calcium oxide at different exposure times under nutrients intake and digestibility, performance, and ruminal parameters of Nellore heifers. The first experiment aimed to evaluate the effects of levels of inclusion and ex
Publicado em: 2008
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19. Performance and nutritional characteristics of beef heifers in growing submitted different strategies of supplementation in grazing / Desempenho e características nutricionais de fêmeas de corte em cria e recria submetidas a diferentes estratégias de suplementação em pastejo
With the objective of evaluate the productive performance and nutritional characteristics of beef females in growing, submitted to different supplementation strategies on grazing, four experiments were conducted contemplating the periods of transition rainy-dry, dry, transition dry- rainy and rainy. In the first experiment, its was evaluated the productive p
Publicado em: 2008
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20. Experimental approaches to study the nutritional value of food ingredients for dogs and cats
This review covers methods that have been applied to study the nutrient value or quality of specific ingredients fed to dogs, cats and comparable species (i.e. foxes, minks, rats, etc.). Typically, the nutritional value or utilization of a specific ingredient is measured by total tract digestibility and has been expanded through the measurement of total nutr
Revista Brasileira de Zootecnia. Publicado em: 2007-07
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21. Soybean silage (Glycine max (L.) Merril) in beef cattle feeding / Silagem de soja na alimentação de bovinos de corte
Two experiments were carried out to evaluate the intake, total and partial nutrient digestibilities, pH and ruminal ammonia concentration (Experiment1), as well as the productive performance in beef cattle (Experiment 2) fed diets containing only soybean silage (SS) (control), soybean silage with microbial inoculant (SSI), soybean silage with inoculant and m
Publicado em: 2007
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22. Performance of Nellore cattle fed individualy or in group, nutrient requirements and proteic evaluation of feeds for ruminants / Desempenho de bovinos Nelore alimentados individualmente ou em grupo, exigências nutricionais e avaliação protéica de alimentos para ruminantes
The present work was developed based on four experiments. The two firsts were conducted aiming to evaluate the fecal dry matter production using total fecal collection or estimated by chromic oxide (Cr2O3), titanium dioxide (TiO2), isolated, purified and enriched lignin of Eucalyptus grandis (LIPE), indigestible neutral and acid detergent fiber (NDFi and ADF
Publicado em: 2007
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23. Efeitos da enramicina ou da monensina sódica sobre a fermentação ruminal e a digestão total em bovinos / Effects of enramycin or sodium monensin on ruminal fermentation and on total digestibility in bovine
The objective of this trial was to study the effects of enramycin administration, compared to sodium monensin, on ruminal fermentation and on total digestibility of diet nutrients in bovine. Twelve non-pregnant and non-lactating cows (675 ± 63 kg of BW) were randomly assigned to three treatments: control group (non-antibiotic), enramycin-treated group (non-
Publicado em: 2006
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24. Efeito do estresse térmico sobre a seleção de dieta por bovinos / Effect of heat stress on diet selection by bovine
The effect of heat stress on diet selection of ruminants was studied in a completely randomized design with 12 fistulated dry cows. The trial was conducted in 20 days with two treatments: thermal comfort (open barn, 21°C) and heat stress (climatic chamber, 38°C). Feeds were offered separately and ad libitum and composed by sugar cane + urea (14% CP) and co
Publicado em: 2005