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Search Results: 1 - 10 of 16515 matches for " Ant?nio Gilberto;Nagata "
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Energia metabolizável de alguns alimentos energéticos para frangos de corte, determinada por ensaios metabólicos e por equa??es de predi??o
Nagata, Adriano Kaneo;Rodrigues, Paulo Borges;Freitas, Rilke Tadeu Fonseca de;Bertechini, Antnio Gilberto;Fialho, Elias Tadeu;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000300025
Abstract: two metabolism assays were carried out with chicks in growth (traditional method of total collection of excreta) in the animal science department of ufla, lavras - mg, to determinate of the nitrogen-corrected apparent metabolizable energy (amen) of some feedstuffs, as well as the determination of the energy values by prediction equations presented in the national and international literature. in the assay i, it was determined amen of some energy alternative feedstuffs to the corn (corn germ, corn quirera, ground and grain millet and ground and grain sorghum) and, in the second, amen of the seven corn hybrids. at same time to the experiments, it were realized laboratory analyses for determination centesimal composition of the tested feedstuffs. the food composition it was used in the prediction amen by equations. the calculated values were, then, compared with observed, using the spearman correlation and scott-knott test. in addition, confidence intervals were obtained by the metabolic assays. ground millet amen was similar to amen grain millet (3223 and 3279 kcal/kg dm respectively), being the same observed for the sorghum (3529 and 3573 kcal/kg dm, ground and grain, respectively). the amen for the corn germ was 3503 kcal/kg dm, while, for the corn quirera, it was 3351 kcal/kg dm. the corn hybrids energy values varied from 3665 to 3804 kcal/kg dm. among the studied equations, the 4021.8 - 227.55ash equation only correlated (p<0,01) with amen mean value observed in vivo, estimating the largest number of energy values inside of calculated confidence intervals. the other equations were not correlated (p<0,01) with the amen values. the results obtained in this assays, allow concluded that the 4021.8 - 227.55ash equation should be used to predict eman values of the studied feedstuffs.
Desempenho e rendimento de carca?a de frangos de corte no período de 22 a 42 dias de idade alimentados com dietas contendo diferentes rela??es lisina digestível: proteína bruta
Rodrigues, Kênia Ferreira;Rodrigues, Paulo Borges;Freitas, Rilke Tadeu Fonseca de;Fialho, Elias Tadeu;Bertechini, Antnio Gilberto;Nagata, Adriano Kaneo;
Revista Brasileira de Zootecnia , 2008, DOI: 10.1590/S1516-35982008000400009
Abstract: this paper was developed to evaluate the performance and the carcass characteristics of broiler chickens over the period from 22 to 42 days, fed with diets formulated with different digestible lysine: crude protein (cp) ratio. a completely randomized experimental design was used, according to a model with two criteria of hierarchical rank. a total of 1,200 male broiler chicks of the cobb strain, raised upy to 21 days of age, when the birds were uniformized with average weight of 879 ± 17 g and distributed into the experimental plots. the diets were isonutrient, except for the levels of cp and digestible lysine, formulated with two levels of cp 17.0 and 19.5%, and five digestible lysine : cp ratios, corresponding to 5.9; 6.4; 6.9; 7.4 and 7.9% within the diet of 17.0% cp and 5.3; 5.7; 6.1; 6.5 and 6.9% on the diet with 19.5% cp. each experimental diet was supplied to 20 birds in each one of the six replicates. at 42 days, the performance characteristics (weight gain, feed consumption and feed conversion) were evaluated, and two birds from each plot were slaughtered for determination of carcass yield, cuts and abdominal fat. feed consumption was reduced feed conversion improved linearly according to the ratios evaluated within the level of 17.0% cp. there was no significant effect of the two levels of cp used, on weight gain, characteristic carcass and cuts yield. abdominal fat linearly reduced in the level of 19.5% cp. the ideal ratio was of 5.9% for 17.0% cp and 5.3% for 19.5% cp. the cp level of the diet can be reduced for 17.0%, with no effect on bird performance.
Geocomputation techniques for spatial analysis: are they relevant to health data?
Camara, Gilberto;Monteiro, Antnio Miguel Vieira;
Cadernos de Saúde Pública , 2001, DOI: 10.1590/S0102-311X2001000500002
Abstract: geocomputation is an emerging field of research that advocates the use of computationally intensive techniques such as neural networks, heuristic search, and cellular automata for spatial data analysis. since increasing amounts of health-related data are collected within a geographical frame of reference, geocomputational methods show increasing potential for health data analysis. this paper presents a brief survey of the geocomputational field, including some typical applications and references for further reading.
Métodos de quantifica??o da cobertura foliar da infesta??o de plantas daninhas e da cultura da soja
Rizzardi, Mauro Antnio;Fleck, Nilson Gilberto;
Ciência Rural , 2004, DOI: 10.1590/S0103-84782004000100003
Abstract: the utilization of mathematical models in order to predict grain yield losses due to weed infestations, which use leaf area measures, depends on the rapid and precise evaluation of this variable. this way, leaf cover, defined as the proportion of soil area accupied by the vertical projection of the foliage of a species, can be a viable alternative. the purpose of this research was to compare the efficiency of methods to evaluate leaf cover in quantifying soybean grain yield losses due to bidens spp. (beggarticks) and sida rhombifolia l. (arrowleaf sida). weeds and crop leaf covers were evaluated 20 days after soybean emergency. it was proved that photographic methods of evaluating leaf cover, integrated to computing aids, are promising alternatives in quantifying this variable although visual evaluation was more practical and rapid to be performed.
O efeito da época de irriga??o e de parcelamentos de aduba??o sobre a produtividade do cafeeiro em três safras consecutivas
Coelho, Gilberto;Silva, Antnio Marciano da;
Ciência e Agrotecnologia , 2005, DOI: 10.1590/S1413-70542005000200018
Abstract: the positive effects of irrigation on coffee crop productivity are reported in several scientific works. however, it is necessary to investigate the irrigation effect on coffee plant behavior, in consecutive harvests. therefore, the present study purposes to evaluate the irrigation seasons and splitting fertilizer effects on coffee plant biennial productivity cycle. an experiment was carried out in split plots, testing different fertilizer numbers applications: plot 1 (p1) has received 12 manual fertilizers applications; plots 2, 3 and 4 (p2, p3 and p4) have received, respectively, 12, 24 and 36 fertilizers applications by irrigation water. in subplots, 3 irrigations seasons were tested, working with 3 replications (blocks): 01/jun to 30/set (subplot a), 15/jul to 30/set (subplot b), 01/set to 30/set (subplot c) and a treatment for testifying without irrigation (subplot d). cloth and ground coffee productivity and total productivity, in kg ha-1, were evaluated by anova and mean tests. significant effects of fertilizer applications, on cloth coffee productivity, were verified by anova, with p1 split plot has provided the best productivity (3120 kg ha-1). irrigation seasons have showed significant effects on three parameters studied. significant statistical interaction was verified only among crops and irrigation seasons. those results demonstrate that irrigation does not have eliminated the coffee plant biennial productivity cycle. it is recommended to start irrigation from 01/jun, because this treatment has produced better results than others, in two of the three crops studied, besides the smallest coefficient of variation concerning productivity.
The authors reply
Camara Gilberto,Monteiro Antnio Miguel
Cadernos de Saúde Pública , 2001,
Geocomputation techniques for spatial analysis: are they relevant to health data?
Camara Gilberto,Monteiro Antnio Miguel Vieira
Cadernos de Saúde Pública , 2001,
Abstract: Geocomputation is an emerging field of research that advocates the use of computationally intensive techniques such as neural networks, heuristic search, and cellular automata for spatial data analysis. Since increasing amounts of health-related data are collected within a geographical frame of reference, geocomputational methods show increasing potential for health data analysis. This paper presents a brief survey of the geocomputational field, including some typical applications and references for further reading.
Descíframe, o...! Campo religioso versus espacios mediáticos
Pedro Gilberto Gomes,Antnio Fausto Neto
Comunicación y sociedad , 2005,
Abstract: Desde el desarrollo de los medios electrónicos, a finales del siglo XIX e inicios del siglo XX, las Iglesias en general y la Iglesia Católica en particular se han preocupado por utilizarlos en la actividad pastoral. En este trabajo, nuestro objetivo es reflexionar sobre la relación de la Iglesia Católica con los medios electrónicos, buscando identificar cuáles son los problemas y cuál es la concepción que orienta a la Iglesia Católica en el uso de esos medios. Según nuestra visión, la dopción de los medios electrónicos para la evangelización supone una enorme cantidad de retos a la Iglesia.
Métodos de quantifica o da cobertura foliar da infesta o de plantas daninhas e da cultura da soja
Rizzardi Mauro Antnio,Fleck Nilson Gilberto
Ciência Rural , 2004,
Abstract: A utiliza o de modelos matemáticos para previs o de perdas de rendimento de gr os causadas pela infesta o das plantas daninhas, que usam a medida da área foliar, depende da rapidez e precis o da estimativa dessa variável. Neste sentido, a cobertura foliar, definida como a propor o de área do solo ocupada pela proje o vertical da parte aérea de uma espécie, pode ser uma alternativa viável. O objetivo deste trabalho foi comparar a eficiência de métodos de avalia o da estimativa da cobertura foliar relativa na quantifica o das perdas de rendimento de gr os de soja causadas por Bidens spp. (pic o-preto) ou Sida rhombifolia L. (granxuma). Foram conduzidos experimentos em campo, utilizando-se diferentes épocas de semeadura da cultura da soja em rela o à desseca o da cobertura vegetal da área, e densidades variáveis de pic o-preto ou guanxuma. Avaliaram-se as coberturas foliares das plantas daninhas e da cultura aos 20 dias após a emergência da soja. Constatou-se que métodos fotográficos de avalia o da cobertura foliar, integrados a auxílios computacionais, s o alternativas promissoras na quantifica o dessa variável, embora a avalia o visual seja mais prática e rápida de ser determinada.
The Use of Solid State NMR to Evaluate the Carbohydrates in Commercial Coffee Granules  [PDF]
Regina Freitas Nogueira, Elisangela Fabiana Boffo, Maria Inês Bruno Tavares, Leonardo A. Moreira, Leila Aley Tavares, Antnio Gilberto Ferreira
Food and Nutrition Sciences (FNS) , 2011, DOI: 10.4236/fns.2011.24050
Abstract: Coffee brings many health benefits due to its chemical constituents. Based on this information, it is essential to know the main chemical compounds from coffee granules; the intermolecular interaction among the coffees compounds and the molecular components homogeneity. In this study six types of roasted commercial coffee were evaluated by solid state nuclear magnetic resonance (NMR), employing carbon-13 (13C) and hydrogen (1H) nucleus. Carbon-13 was analyzed applying high field NMR techniques, such as: magic angle spinning (MAS); magic angle spinning with cross-polariza- tion (CPMAS) and magic angle spinning with cross-polarization and dipolar dephasing (CPMASDD). The hydrogen was evaluated via relaxation times. Proton spin-lattice relaxation time in the rotating frame was deter-mined through the carbon-13 decay, during the variable contact-time experiment, using high field NMR. Proton spin-lattice relaxation time was determined through the inversion-recovery pulse sequence, using low field NMR. Considering all NMR results, it was concluded that the major coffee compounds are: a) triacilglycerides, which constitute the mobile region in the granule coffee and b) Carbohydrates such as: polysaccharides and fibers that belong to the rigid domain. These constituents belong to different molecular mobility domain, although they have strong intermolecular interactions due to the granule organization.
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