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Search Results: 1 - 10 of 384046 matches for " Paulo César de Aguiar;Dias "
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Avalia??o das altera??es bromatológicas e de degradabilidade do resíduo de lixadeira do algod?o após tratamento biológico com Pleurotus sajor-caju
Castro, Ana Luisa Aguiar de;Paiva, Paulo César de Aguiar;Dias, Eustáquio Souza;Santos, Juliana dos;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000300017
Abstract: the objective of the experiment was to evaluate the bio-conversion treatment to enhance the nutritional value and degradability of cotton textile mill waste, using the fungi pleurotus sajor-caju. the experiment was conducted at the departments of biology and animal science of the universidade federal de lavras (ufla), between july 2002 and january 2003. bio-conversion was induced by the use of the residue as the main component in a substrate bed for cultivation of edible mushrooms (c1 and c2). in comparison to the untreated cotton textile mill waste, two bio-conversion alternatives by pleurotus sajor-caju were tested. after mushroom production, samples of the treated material were submitted to in situ degradability tests and chemical composition. results indicated that c1 and c2 treatments decreased fibrous fractions (adf and ndf) and increased cp of cotton textile mill waste, improving the chemical composition. c1 and c2 treatments also resulted in an increased of soluble fraction (a), the degradation rate (c), and decreased insoluble potential degradable fraction (b); increasing effective degradability of dm and ndf of cotton textile mill waste.
Avalia??o da produ??o de Pleurotus sajor-caju (Fr.) singer utilizando resíduo do beneficiamento têxtil do algod?o como substrato
Castro, Ana Luisa Aguiar de;Paiva, Paulo César de Aguiar;Banys, Vera Lúcia;Dias, Eustáquio Souza;Santos, Juliana dos;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000500002
Abstract: the experiment was conducted to investigate the viability of the production of the edible fungus pleurotus sajor-caju (fr.) singer in substrates in which main source of carbon was the cotton textille mill waste. two substrates compositions were tested: c1 (cotton textille mill waste, wheat bran, plaster and limestone) and c2 (cotton textille mill waste, wheat bran, bean straw, plaster and limestone). a dic experimental design was used, with nine repetitions for treatment and the production data and biological efficiency were analyzed being used the procedure anovag of the statistical package saeg. the cotton textille mill waste improvement, as the main ingredient of the substrate, was shown efficient for the production of the mushroom p. sajor-caju, presenting satisfactory values of productivity (0,56 and 0,55 kg/kg substratum) and biological efficiency (55,76 and 55,39%), respectively for c1 and c2. these results showed us that cotton textille mill waste, could be recommended as less onerous alternative of commercial substrate for the species pleurotus sajor-caju.
Avalia??o do cultivo de Pleurotus sajor-caju (fries) sing. sobre o resíduo de algod?o da industria têxtil para a produ??o de cogumelos e para alimenta??o animal
Gon?alves, Clenderson Corradi de Mattos;Paiva, Paulo César de Aguiar;Dias, Eustáquio Souza;Siqueira, Félix Gon?alves de;Henrique, Fábio;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000100028
Abstract: the waste coming from cotton processing in mills in the textile industry is a lignocellulose-rich material, but has low digestibility, and is poor in proteins and minerals, making it inappropriate for ruminant feeding. this study was intended to evaluate the productivity and biologic efficiency of cotton textile mill waste in the production of the edible mushroom pleurotus sajor-caju, and to evaluate the alterations brought about in the waste for use in ruminant feeding. five treatments were undertaken in the following manner: t1- 80% eucalyptus sawdust + 20% wheat bran (control); t2- 50% waste + 50% sawdust; t3- 45% waste + 45% sawdust + 10% wheat bran; t4- 40% waste + 40% sawdust + 20% wheat bran and t5- 80% waste + 20% wheat bran. t5 showed the best results for productivity (22.46%) and biologic efficiency (71.48%). fungus altered the constitution of the substrates in the stages of production of the mushroom. therefore, the use of cotton textile mill waste in the cultivation of pleurotus sajor-caju may become a viable alternative for mushroom production, and also improve the quality of this waste for use in animal feeding.
Pessoas com Deficiência Visual: barreiras para o lazer turístico
Marina Dias de Faria,Paulo César Motta
Revista Turismo em Análise , 2012,
Abstract: ResumoA presente pesquisa teve como objetivo identificar os fatores que mais restringem o consumo de servi os de lazer turístico por pessoas com deficiência visual. O turismo inclusivo caminha a passos lentos no Brasil, a despeito de 24 milh es de brasileiros serem pessoas com deficiências – das quais 48% apresentam deficiência visual, foco desse estudo. Na presente pesquisa foi elaborado um questionário com o auxílio da revis o de literatura e de entrevistas com oito informantes-chaves. Esse questionário continha 27 assertivas, cobrindo diversos aspectos de restri o ao turismo para pessoas com deficiência visual. O questionário foi enviado por email para pessoas com deficiência visual, obtendo-se 202 respostas válidas. Os resultados da presente pesquisa apontam sete fatores de restri o ao consumo de servi os de lazer turístico para pessoas com deficiência visual: Tempo, Recursos Financeiros, Quest es Pessoais, Importancia da Companhia, Barreiras Atitudinais, Barreiras Arquitet nicas e Atendimento. As maiores médias foram atribuídas aos fatores Atendimento e Importancia da Companhia. Diante dos resultados, é possível sugerir que, no setor estudado, faltam investimentos em treinamento para que os funcionários de linha de frente estejam capacitados a atender os deficientes visuais de forma adequada. Ao final do artigo s o apresentadas sugest es para novos esfor os de pesquisa.Palavras-chave: pessoas com deficiência visual; barreiras; lazer turístico. This research aimed to identify the factors that restrict the consumption of leisure tourism services for people with visual impairments. The inclusive tourism walking at a slow pace in Brazil, despite 24 million Brazilians are people with disabilities - of which48% have visual impairments, focus of this study. In this study a questionnaire was designed with the help of literature review and interviews with eight key informants. The questionnaire contained 27 statements covering different aspects of constraint to tourism for people with visual impairments. The questionnaire was emailed to people with visual impairments,
Study of the Reaction Derivatization Glyphosate and Aminomethylphosphonic Acid (AMPA) with N,O-Bis(trimethylsilyl)trifluoroacetamide  [PDF]
T. C. P. G. Catrinck, Maria Clara Santana Aguiar, Amanda Dias, Flaviano Oliveira Silvério, Paulo Henrique Fidêncio, Gevany Paulino de Pinho
American Journal of Analytical Chemistry (AJAC) , 2013, DOI: 10.4236/ajac.2013.411077
Abstract:

This work aimed to study the derivatization unprecedented of glyphosate and AMPA solutions using N,O-bis (trimethylsilyl)trifluoroacetamide (BSTFA) combined with trimethylchlorosilane (TMCS), evaluating the composition of the reaction medium, use of ultrasound, volume of BSTFA:pyridine and pH of the reaction medium. From this study it was inferred that the reaction medium was composed of BSTFA:pyridine in ratio 60:100, respectively, without ultrasonic vibration and pH adjustment that provide optimal conditions for analysis by GC-MS. Furthermore, the methodology used was simple and fast, and that was the most practical method commonly used.

Morfogênese e acúmulo de forragem em pastagem de Cynodon dactylon cv. coastcross em diferentes esta??es de crescimento
Vilela, Duarte;Paiva, Paulo César de Aguiar;Lima, Josiane Aparecida de;Cardoso, Rodrigo Carvalho de;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000600012
Abstract: the experiment was conducted to estimate morphogenic and structural characteristics and dry matter accumulation rate of leaf blades in a pasture of cynodon dactylon cv. coast-cross grass intermittently grazed by lactating cows. the evaluations were performed in spring (october-november), in summer (february-march) and in fall (may-june). the study was conducted observing a completely randomized design. with six replications. leaf length, appearance and senescence in marked tillers were registered over the rest period of the paddock. tillers in sampling areas of 0.09 m2 were counted for estimation of the tiller population density. the net dm accumulation rate of leaf blades was obtained by multiplying the dry matter accumulation rate by the number of tillers/area. leaf elongation rate was higher in the summer; while leaf appearance rate and the number of leaves/tiller were higher in spring. tiller population did not vary with season, averaging 2,770 tillers/m2. the senescence rate averaged 2.44 mm/day in the spring and no leaf senescence was observed over the summer and fall. dry matter accumulation rate of leaf blades was higher in the summer and showed a close relationship with leaf elongation rate and leaf size. leaf blade accumulation rate was overestimated when calculated from leaf elongation rate and tiller density data.
NUTRITIVE VALUE OF COFFEE (Coffea arabica L.) HULLS TREATED WITH SODIUM HYDROXIDE AND/OR UREA SUPPLEMENTED WITH ALFALFA (Medicago sativa L.) HAY VALOR NUTRITIVO DA CASCA DE CAFé (Coffea arabica L.) TRATADA COM HIDRóXIDO DE SóDIO E/OU URéIA SUPLEMENTADA COM FENO DE ALFAFA (Medicago sativa L.)
Rodrigo Afonso Leit?o,Paulo César de Aguiar Paiva,Carlos Alberto Pereira de Rezende
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v35i1.2283
Abstract: The aim of this work was to assess the nutritive value of coffee hulls treated with sodium hydroxide and urea. Twenty sheeps were utilized in a randomized block design, with four blocks and five treatments combining 50% alfalfa hay and 50% treated or untreated coffee hulls, as follows: T1-alfalfa hay and pure coffee hulls; T2-hay and coffee hulls + 5% urea; T3-hay + coffee hulls + 1.5% NaOH; T4-hay + coffee hulls + 1.5% NaOH + 5% urea; T5-100% hay. The treatment coffee hulls with urea resulted only in increased crude protein content. The treatment with NaOH did not resulted in any changes in the chemical composition. Hulls, whether treated or not, caused intake reduction. There were differences among treatments as the digestible protein intake, digestible energy intake, and apparent digestibility of crude protein. Given the bromatological composition and digestibility of pure coffee hulls, we can conclude that it is a byproduct can be utilized by ruminants. For low consumption of coffee hulls, it should only be used together with another fodder with higher nutritional value, particularly with a higher energy content. KEY-WORDS: Agricultural byproducts; digestibility; intake; ruminants. O objetivo deste trabalho foi avaliar o valor nutritivo da casca de café tratada ou n o com hidróxido de sódio e/ou uréia. Foram utilizados vinte carneiros, em blocos casualizados, com quatro blocos e cinco tratamentos constituídos de 50% de feno de alfafa e 50% de casca de café tradada ou n o, assim distribuídos: T1-feno de alfafa e casca de café pura; T2-feno e casca de café + 5% uréia; T3-feno e casca de café + 1,5% NaOH; T4-feno e casca de café + 1,5% NaOH + 5% uréia; T5-100% feno de alfafa. O tratamento da casca de café com uréia propiciou apenas aumento no teor de proteína bruta (PB), e com NaOH n o provocou altera es na composi o química. A casca tratada ou n o provocou depress o no consumo. Houve diferen a entre os tratamentos quanto ao consumo de proteína digestível (CPD), consumo de energia digestível (CED) e digestibilidade aparente da proteína bruta (DAPB). Considerando-se a composi o bromatológica e a digestiblidade da casca de café pura, ela é um subproduto que pode ser aproveitado pelos ruminantes. Devido ao baixo consumo da casca de café tratada ou n o, deve-se fornecêla junto a outro alimento de melhor valor nutritivo, principalmente com um melhor teor de energia. PALAVRAS-CHAVE: Consumo; digestibilidade; ruminantes; subprodutos agrícolas.
Efeito dos tratamentos físicos e químicos no resíduo de lixadeira do algod?o
Santos, Juliana dos;Castro, Ana Luisa Aguiar de;Paiva, Paulo César de Aguiar;Banys, Vera Lúcia;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000400027
Abstract: the experiment was carried out at the department of animal science of the universidade federal de lavras and at the food laboratory at the universidade josé do rosário vellano (unifenas), with the objective to evaluate the nutritive value of cotton textile mill waste using chemical composition (dm, cp, ndf, adf) and ruminal degradability of the dry matter and ndf. the treatments were: t1 - in natura residue (in); t2 - residue submitted to the pressure and steam treated (127oc/1,5 kgf/cm2/35"; ps); t3 - 4% sodium hydroxide treated residue (four 24 hours; naoh); t4 - 3% urea treated residue (for 28 days; u); t5 - 4% naoh +3% urea treated residue (naoh/u); t6 - pressure and steam + 4% naoh treated residue (ps/naoh); t7 - pressure and steam + 3% urea treated residue (ps/u). the results obtained in the chemical composition can allow concluding that combined treatments improved the nutritive value of the residue, as the naoh/u treatment showed better results of cp, ndf, adf. in the degradability experiment, it may be concluded that ps, u, naoh/u, ps/naoh and ps/u treatments were efficient in increasing effective degradability of dm, also resulted higher dry matter soluble fraction (a) and lower insoluble potentially degradable fraction (b). the treatments u, ps/naoh and ps/u had higher values of effective degradability of ndf and higher soluble fraction (a). the combined treatments increased the degradability and nutritive value of cotton textile mill waste, and combined treatments with urea had the better results.
Efeito de diferentes doses de enxofre no consumo voluntário e nas popula??es de protozoários do rúmen de novilhas mesti?as alimentadas com capim-elefante de baixa qualidade
Vidal, Juliana Miacci;Paiva, Paulo César de Aguiar;Arcuri, Pedro Braga;Lopes, Fernando César Ferraz;Zaquini, Leonardo;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000100032
Abstract: the experiment was carried out in the experimental field of coronel pacheco belonging to embrapa dairy cattle, minas gerais. the effects of the doses of sulfur (ammonium sulfate, 0.15%, 0.31%, 0.46% and 0.92%s fresh matter/day) on the ruminal protozoa population was evaluated by utilizing four 7/8 holstein x zebu, heifers arranged in 4 x 4 latin square. low quality elephant grass (76.1% ndf in dm) , chopped with correction of the cp content to 7% with urea plus a mineral mixture without sulfur given directly into the rumen. samplings of the ruminal content were done, one hour after feeding. the estimate of the ruminal microbial populations was done by means of the direct microscopy. the results were transformed to decimal logarithm and evaluated statistically. there were no significant differences among the treatments for microorganisms. the 0.92%s treatment presented the least dry matter intake and, in addition, caused start of intoxication in two animals. according to those results, doses of 0.31% of sulfur added to the diet promoted the increase of the ruminal microorganism populations and hence a greater voluntary intake.
Avalia o da Casca e da Polpa Desidratada de Café (Coffea arabica L.) pela Técnica de Degradabilidade In vitro de Produ o de Gás
Barcelos Adauto Ferreira,Paiva Paulo César de Aguiar,Olalquiaga Peréz Juan Ramón,Teixeira Júlio César
Revista Brasileira de Zootecnia , 2001,
Abstract: Com o objetivo de avaliar a casca e a polpa desidratada de café, quanto à degradabilidade in vitro pela técnica de produ o de gás, conduziu-se o experimento, utilizando as cultivares de café Catuaí, Rubi e Mundo Novo. A polpa foi obtida pela despolpa úmida em despolpador mecanico e, em seguida, seca ao sol até alcan ar 13% de umidade. Os materiais foram armazenados em sacos de ráfia em ambiente coberto, ventilado e seco, por um ano, amostradas em triplicata a cada 90 dias. Incubaram-se in vitro 400 mg de cada amostra (MS e FDN), em triplicata em banho maria a 39oC. A produ o cumulativa de gás foi obtida nos tempos 1, 2, 3, 4, 5, 6, 12, 18, 24, 30, 36, 48, 60 e 72 horas. A cinética da produ o cumulativa de gás para a MS e FDN foi analisada utilizando-se o modelo Vt = Vt1/(1 + exp(2 + 4m(L -- T))) e SDN pelo modelo Vt = Vt1 x (1 -- exp (-m x T)). A produ o cumulativa de gás da fra o SDN foi obtida pela diferen a entre a produ o cumulativa da MS e FDN. O armazenamento da casca e polpa desidratada de café melhorou a taxa de degrada o e reduziu a fra o fibrosa e n o degradável, disponibilizando a úcares solúveis para a flora ruminal. Na casca de café de todas as cultivares, a maximiza o da contribui o da fra o de SDN e FDN na fermenta o ocorreu, respectivamente, em torno de 24 e 48 horas. A máxima produ o de gás na MS da polpa ocorreu entre 48 e 60 horas, para todas as cultivares, e foi conseqüência da máxima produ o de gás da fra o FDN ocorrida em torno de 60 horas. Longo período de coloniza o pode constituir limita o no uso da casca e polpa desidratada de café, na alimenta o de ruminantes, comprometendo a utiliza o do alimento pelos microorganismos do rúmen, devido à rápida passagem pelo rúmen.
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