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Search Results: 1 - 10 of 183482 matches for " Fontes Dalton de Oliveira "
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Níveis dietéticos de lisina para suínos da ra?a Landrace dos 15 aos 30 kg
Moretto, Valéria;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Fontes, Dalton de Oliveira;
Revista Brasileira de Zootecnia , 2000, DOI: 10.1590/S1516-35982000000300023
Abstract: two experiments were carried out to determine the total lysine requirement of purebred landrace swine, males and females, from 15 to 30 kg live weights. fifty females and fifty males were used in a randomized complete block design, with five treatments, five replications and two animals per experimental unit, in the experiments i and ii, respectively. the treatments consisted of a basal diet, supplemented with five levels of l-lysine.hcl, resulting in diets with .85, .95, 1.05, 1.15, 1.25% of total lysine in both experiments. in experiment i, the dietary lysine levels did not influence the average daily feed intake. the average daily gain, daily lysine intake and protein deposition rates in the carcass linearly increased with the lysine level. the treatments quadractily influenced the feed:gain ratio, which improved up to 1.08% lysine level. in the experiment ii, lysine level did not influence the average daily feed intake and the feed:gain ratio. there was a quadratic effect of dietary lysine level on average daily gain, average daily lysine intake and protein deposition rate in the carcass. the best results of average weight gain were obtained with the level of 1.08% lysine. the total lysine requirement, for the starting growing phase (15 to 30 kg), was estimated to be 1.08%, for both sexes.
Níveis de lisina para leitoas selecionadas geneticamente para deposi o de carne magra, dos 60 aos 95 kg
Fontes Dalton de Oliveira,Donzele Juarez Lopes,Ferreira Aloisio Soares,Oliveira Rita Flávia Miranda de
Revista Brasileira de Zootecnia , 2000,
Abstract: Foram utilizadas 50 leitoas mesti as (Hampshire, Landrace Belga, Pietran) com peso inicial médio de 60,23±0,49 kg e alto potencial genético para deposi o de carne magra na carca a, para avaliar diferentes níveis de lisina. Foi usado delineamento de blocos ao acaso com cinco tratamentos, cinco repeti es e dois animais por unidade experimental. Os tratamentos corresponderam a uma ra o basal com 15,8% de proteína bruta, suplementada com cinco níveis de L-lisina HCl, resultando em ra es com 0,75; 0,85; 0,95; 1,05; e 1,15% de lisina. N o se observou efeito dos tratamentos sobre consumo de ra o e ganho de peso diário, entretanto, o consumo de lisina diário elevou-se de forma linear com o aumento do nível de lisina da ra o. Houve efeito quadrático dos níveis de lisina sobre a convers o alimentar e o teor de uréia no soro sangüíneo, que reduziram até o nível de 1,00% de lisina ou 0,302% /Mcal de ED, o que correspondeu a um consumo estimado de lisina de 23,90 g/dia. N o se observou efeito dos tratamentos sobre a porcentagem de água e proteína e taxa de deposi o de proteína na carca a, entretanto, a porcentagem e a taxa de deposi o de gordura diminuíram de maneira linear. Concluiu-se que leitoas com alto potencial genético para deposi o de carne magra, dos 60 aos 95 kg de peso vivo, requerem 1,00% de lisina (0,302%/Mcal de ED) e 0,90% (0,272%/Mcal de ED) de lisina digestível verdadeira, para máximo desempenho, o que corresponde a consumo diário de lisina total e digestível de 23,9 e 21,5 g, respectivamente.
Níveis dietéticos de lisina para suínos da ra a Landrace dos 15 aos 30 kg
Moretto Valéria,Donzele Juarez Lopes,Oliveira Rita Flávia Miranda de,Fontes Dalton de Oliveira
Revista Brasileira de Zootecnia , 2000,
Abstract: Com o objetivo de determinar a exigência nutricional de lisina total para suínos da ra a Landrace, machos inteiros e fêmeas, de 15 a 30 kg de peso, foram conduzidos dois experimentos. Utilizaram-se 50 fêmeas no experimento I e 50 machos inteiros no experimento II, em delineamento em blocos casualizados, com cinco tratamentos, cinco repeti es e dois animais por unidade experimental, em cada experimento. Os tratamentos consistiram de uma ra o basal suplementada com cinco níveis de L-lisina.HCl, resultando em ra es com 0,85; 0,95; 1,05; 1,15; e 1,25% de lisina, em ambos os experimentos. No experimento I, o consumo de ra o médio diário n o foi influenciado pelo nível de lisina das ra es. Ganho de peso médio diário, consumo de lisina médio diário e taxa de deposi o de proteína na carca a aumentaram de forma linear com o nível de lisina da ra o. Os tratamentos influenciaram de forma quadrática a convers o alimentar, que melhorou até o nível de 1,08% de lisina. No experimento II, os tratamentos n o influenciaram o consumo de ra o médio diário e a convers o alimentar. Constatou-se efeito quadrático dos níveis de lisina sobre ganho de peso médio diário, consumo de lisina médio diário e taxa de deposi o de proteína na carca a. Os melhores resultados de ganho de peso foram observados no nível de 1,08% de lisina. A exigência de lisina total na ra o, para a fase inicial de desenvolvimento (15 a 30 kg), foi de 1,08%, para ambos os sexos.
Quantification and Determination of Starch in Diets Using Different Methodologies: Infrared Spectroscopy with Fourier Transformer, Laser Diffraction and Enzymatic Analysis  [PDF]
Andressa Nathalie Nunes, Eloisa de Oliveira Sim?es Saliba, Dalton Oliveira Fontes, Ana Tereza Peret Dell’Isola, Tatiana Carolina Gomes Dutra de Souza, Poliana Campos, Esmaile Perceu Rocha Nunes, Jaqueline Sim?es Saliba, Ludhiana Rosa Ferreira
American Journal of Analytical Chemistry (AJAC) , 2017, DOI: 10.4236/ajac.2017.82012
Abstract: A digestibility experiment was conducted in the Animal Nutrition Laboratory of the Veterinary School of the Federal University of Minas Gerais (UFMG), Protocol ethics committee for work with animal experimentation CETEA/ UFMG 212/2010, in order to validate the instrumental techniques Laser Diffraction (Partica) and Infrared Spectroscopy with Fourier Transformer (FTIR) method, as replacement methods of the reference (Enzymatic Analysis) Technique, of starch quantification in diets of growing pigs. The experiment lasted 12 days (7 days of adaptation to the cage and diet and 5 days of total collection). Fifteen barrows with average weight of ±25 kg and 65 days old were used for this study. A completely randomized experimental design was adopted, with split plots and subplots. The plots were the diets (1—Reference, 2—Reference + inclusion of 30% micronized soybean and 3—Reference +30% substitution of plasma) and the subplots were the techniques (Partica, FTIR and Enzymatic Technique, with five repetitions (animals) per diet). The results obtained with the Partica and FTIR techniques were compared to the reference method. There was no statistical difference (p > 5%) between these techniques evaluated in comparison to the reference method to quantify starch. However, it was observed that the FTIR technique was different from the reference method for (p > 5%) overestimating the means of evaluated samples.
Níveis de lisina para leitoas selecionadas geneticamente para deposi o de carne magra, dos 30 aos 60 kg, mantendo constante a rela o entre lisina e metionina+cistina, treonina, triptofano, isoleucina e valina
Fontes Dalton de Oliveira,Donzele Juarez Lopes,Oliveira Rita Flávia Miranda de,Conhalato Giane da Silva
Revista Brasileira de Zootecnia , 2000,
Abstract: Foram utilizadas 40 leitoas mesti as (Hampshire, Landrace Belga, Pietran) com peso inicial médio de 30,1±1,25 kg e alto potencial genético para deposi o de carne magra na carca a, para avaliar diferentes níveis de lisina. Foi usado delineamento de blocos ao acaso com quatro tratamentos, cinco repeti es e dois animais por unidade experimental. Os tratamentos corresponderam a uma ra o basal com 17,5% de proteína bruta, suplementada com quatro níveis de L-lisina HCl, resultando em ra es com 1,00; 1,10; 1,20; e 1,30% de lisina. As ra es foram suplementadas com níveis crescentes de treonina, metionina, isoleucina, valina e triptofano, resultando em ra es nas quais a rela o entre estes aminoácidos e a lisina se manteve constante em 67, 62, 60, 68 e 19%, respectivamente, com base na digestibilidade verdadeira. N o se observou efeito dos tratamentos sobre consumo de ra o, ganho de peso diário e concentra o de uréia no soro sangüíneo dos animais, entretanto, os animais pareceram ter atingido o potencial genético máximo para ganho de peso no nível de lisina de 1,10% (0,329%/Mcal de ED), correspondente a um consumo de lisina de 22 g/dia. Observou-se efeito linear sobre o consumo de lisina diário, que aumentou, e a convers o alimentar, que reduziu com o aumento do nível de lisina da ra o. O nível de 1,30% (0,389%/Mcal de ED) ou 1,19% (0,356%/Mcal de ED), correspondente a um consumo de lisina total e digestível, respectivamente, de 24 e 22,1 g/dia, proporcionou os melhores resultados de convers o alimentar de leitoas dos 30 aos 60 kg, quando se utilizou o conceito de proteína ideal na formula o das ra es experimentais.
Níveis de lisina para leitoas selecionadas geneticamente para deposi??o de carne magra na carca?a, dos 15 aos 30 kg
Fontes, Dalton de Oliveira;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Silva, Francisco Carlos de Oliveira;Lopes, Darci Clementino;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000100012
Abstract: fifty hybrid gilts, with high genetic potential for lean gain and initial and final weight of 15.39 ± 0.59 and 30.93 ± 1.72 kg, respectively, were used to evaluate diet with different levels of lysine. an experimental design of randomized blocks, with five treatments, five replicates and two animals per experimental unit, was used. the treatments corresponded to a basal diet with 19% crude protein, supplemented with five levels of hcl-l-lisine, that resulted in diets with 0.95, 1.05, 1.15, 1.25 and 1.35% of lysine. the daily weight gain and daily lysine intake linearly increased with the dietary lysine level. there was quadratic effect of lysine levels on daily feed intake and feed/gain ratio, that increased to the lysine level of 1.26% (0.365%/mcal of de) or 1.13% (0.328%/mcal of de) of true digestible lysine, corresponding to the total and digestible lysine estimated intake of 14.62 and 13.12 g/day, respectively. there was no effect of treatments on protein and water percentage in carcass and on blood serum urea levels. the treatments influenced quadraticly the fat percentage and fat deposition rate in carcass, that decreased until 1.25 and 1.18% lysine level, respectively. the protein deposition linearly increased with the dietary lysine level. it was concluded that gilts from 15 to 30 kg require 1.26% of total lysine or 1.13% of digestible lysine, corresponding to a total and digestible lysine estimated intake of 14.6 and 13.1 g/day, respectively.
Níveis de lisina para leitoas selecionadas geneticamente para deposi??o de carne magra na carca?a, dos 30 aos 60 kg
Fontes, Dalton de Oliveira;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Lopes, Darci Clementino;Ferreira, Aloízio Soares;Silva, Francisco Carlos de Oliveira;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000100011
Abstract: fifty hybrid gilts, with high genetic potential for lean gain and initial and final average weight of 30.0 ± 0.45 and 59.9 ± 2.53 kg, respectively, were used in an experiment to evaluate diet with different levels of lysine. an experimental design of randomized blocks, with five treatments, five replicates and two animals per experimental unit, was used. the treatments corresponded to a basal diet with 17.5% crude protein, supplemented with five levels of hcl-l-lysine, resulting in diets with 0.80, 0.90, 1.00, 1.10, and 1.20% of total lysine. there were no effects of treatments on daily weight gain and serum urea concentration, however, daily feed intake and daily lysine intake increased linearly with the dietary lysine level. there was a quadratic effect of lysine levels on feed:gain ratio, that increased up to the total lysine level of 1.16% (0.347%/mcal of de) or 1.05% (0.315%/mcal of de) of digestible lysine, corresponding to the total and digestible lysine intake of 21.8 and 19.7 g/day, respectively. there was no effect of treatments on protein percentage, however, the water percentage in carcass linearly decreased. there was quadratic effect of treatments on fat percentage and fat deposition rate in carcass, that decreased up to the lysine level of 1.09 and 1.12%, respectively. the protein deposition rate improved quadraticly up to the level of lysine of 1.04%. it was concluded that gilts with high genetic potential for lean gain, from 30 to 60 kg require 1.16% of total lysine or 1.05% (0.315%/mcal of de) of true digestible lysine, corresponding to total and digestible lysine intake of 21.8 and 19.72 g/day, respectively, for maximal performance. the level of total lysine of 1.04% or 0,93% of digestible lysine proportioned the best protein deposition rate.
Comparison of techniques that estimates the digestibility for younglings ostriches in the initial growing phase Compara o de técnicas de estimativa da digestibilidade para filhotes de avestruzes na fase inicial de crescimento
Joana D′Arc Silveira Souza,Walter Motta Ferreira,Eloísa Sim?es Saliba,Dalton de Oliveira Fontes
Revista Brasileira de Saúde e Produ??o Animal , 2007,
Abstract: The aim of the present study was to compare two methods of digestibility estimation for ostrich younglings. Thirty two three-month-old ostriches were selected and allocated in boxes. External markers were used: chromic oxide and the LIPE for determination of the values of the digestibility coefficient and digestible fraction of the nutrients. The experimental design was the entirely randomized, with two treatments and 34 repetitions. There was significant difference (P<0.05) between the estimation methods. LIPE was the method with the best estimation, due to its lower coefficient of variation in relation to the values found for chromic oxide, as well as it presented values closer to those found in other studies. Com o objetivo de contrastar dois métodos de estimativa da digestibilidade para filhotes de avestruz, foi realizado o experimento, sendo selecionados 34 avestruzes ao final dos três meses de idade, alojados em piquetes subdivididos em baias. Foi utilizado o auxílio dos indicadores externos: o óxido cr mico e o LIPE para determina o dos valores do coeficiente de digestibilidade e fra o digestível dos princípios nutritivos. O delineamento experimental foi inteiramente casualizado com dois tratamentos e 34 repeti es. Houve diferen a significativa (P < 0,05) entre os métodos de estimativa. Neste contexto, o LIPE estimou melhor, devido ao seu menor coeficiente de varia o em rela o aos valores obtidos pelo óxido cr mico, se aproximado mais dos dados obtidos em literatura pertinente.
Uso da LIPE? como indicador externo na determina??o da digestibilidade da proteína e matéria seca de alimentos em frangos de corte
Vasconcellos, Carlos Henrique de Figueiredo;Fontes, Dalton de Oliveira;Saliba, Eloisa de Oliveira Sim?es;Veloso, José Ant?nio de Figueiredo;Lara, Leonardo José Camargos;
Ciência e Agrotecnologia , 2011, DOI: 10.1590/S1413-70542011000300025
Abstract: a metabolism experiment was carried out to evaluate the use of lipe? as an external indicator of dry matter and protein digestibility in broilers. the treatments corresponded to a basal diet and eight other different diets. the foods used were: corn grain, expanded corn, soybean meal, expanded soybean meal, gluten meal 22% crude protein; gluten meal 60% crude protein, meat and bone meal and feather meal. the basal diet was replaced with 40% or 25% of the food containing more energy or protein, respectively. two hundred and seventy broiler chickens were used from 21 to 31 days old. a completely randomized design in a 9x3 factorial arrangement (nine forms of rations x three methods) with three replicates was used. the digestible dry matter and protein and metabolizable energy of the food was calculated by the total fecal collection method and by the indicator methods of chromic oxide and lipe?; the three methods were further compared. chromic oxide use resulted in higher values of coefficient of digestibility for expanded soybean meal and feathers and viscera meal when compared to the use of lipe? and total feces collection which were similar. the results validated the lipe? as an external protein and dry matter digestibility index of the feed of broiler chicks evaluated.
Available phosphorus in diets for 15 to 30 kg pigs genetically selected for meat deposition
Arouca, Cláudio Luiz Corrêa;Silva, Francisco Carlos de Oliveira;Fontes, Dalton de Oliveira;Saraiva, Alysson;Donzele, Juarez Lopes;Silva, Martinho de Almeida e;Paula, Eriane de;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000100010
Abstract: with the objective to evaluate the effect of dietary available phosphorus levels (ap) on the performance, blood and bone parameters of castrated male and female pigs, genetically selected for meat deposition, 60 commercial hybrids pigs with initial weight of 15.54±0.68 kg were allotted in a completely randomized block design, with six treatments (0.103, 0.210, 0.317, 0.424, 0.531, and 0.638% ap), five replicates, and two animals per experimental unit. pigs were fed ad libitum and water was provided until the end of the experimental period (21 days), when animals reached 31.31±2.94 kg. daily weight gain and daily feed intake increased, while the feed conversion improved quadratically up to 0.534, 0.487, and 0.574% ap maximum responses, respectively. the ap intake and the values of inorganic phosphorus in serum increased linearly with increasing the levels of ap in the diets. alkaline phosphatase activity increased quadratically up to 0.558% maximum response. bone breaking strength and calcium, phosphorus, and ash contents in the bones increased linearly with increasing ap concentration in the diets. the available phosphorus requirement of castrated male and female pigs genetically selected for meat deposition from 15 to 30 kg for best results of performance is 0.574%, corresponding to a daily intake of 8.26 g of available phosphorus.
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