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Search Results: 1 - 10 of 417229 matches for " Márcio Gilberto;Rodrigues "
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Nitrogen, calcium and phosphorus balance of broilers fed diets with phytase and crystalline amino acids Balan o de nitrogênio, cálcio e fósforo em frangos de corte recebendo dietas com fitase e aminoácidos cristalinos
Elisangela Minati Gomide,Paulo Borges Rodrigues,Márcio Gilberto Zangeronimo,Ant?nio Gilberto Bertechini
Ciência e Agrotecnologia , 2011,
Abstract: The objective of this study was to evaluate the effect of reduced-crude protein (CP) and available phosphorus (aP) diets, added with phytase and amino acids for broilers in the growing (14 to 21 days old) and retirement (35 to 42 days) phases on nitrogen, potassium and phosphorus balance. Ninety Cobb broilers were distributed in a completely randomized design with three treatments and six replications with five and three birds per experimental unit in the growing and retirement phases, respectively. Diets were elaborated to contain reduced CP and aP levels (19 and 17% CP in the growing phase, with 0.34% aP; and 18 and 16% CP in the retirement phase, with 0.30% aP), supplemented with crystalline amino acids and 500 FTU of phytase/kg diet. These were compared to a control diet (21% CP and 0.46% aP for growing phase and 19% CP and 0.40% aP for retirement phase). The reduction of CP in four percentual units reduced the N excretion and increased the retention of this element, showing that the phytase had no influence on N balance when used the crystalline amino acids in the diets. The phytase reduced the P excretion and increased the retention ones. The potassium excretion decreased in reduced-CP diets, but this excessive reduction decreased the retention of this element, except in the retirement phase. It was concluded that the reduced-CP and aP diets, supplemented with phytase and amino acids, are efficient in reducing the pollutant power of the broilers excrements in the growing and retirement phases of production. Objetivou-se, com este trabalho, avaliar o efeito de ra es com reduzidos teores de proteína bruta (PB) e fósforo disponível (Pd), suplementadas com fitase e aminoácidos, para frangos de corte na fase de crescimento (14 a 21 dias) e termina o (35 a 42 dias de idade) sobre o balan o de nitrogênio, potássio e fósforo. Foram utilizados 90 pintos Cobb, distribuídos em um delineamento inteiramente casualizado com três tratamentos e seis repeti es, com cinco e três aves por unidade experimental nas fases inicial e de crescimento, respectivamente. As ra es foram formuladas para conterem níveis reduzidos de PB e Pd (19 e 17% de PB na fase de crescimento, com 0,34% de Pd e 18 e 16% de PB na fase de termina o, com 0,30% de Pd) e suplementadas com aminoácidos e 500 FTU de fitase/kg de ra o Essas ra es foram, ent o, que foram comparadas a uma ra o controle (21% de PB e 0,46% de Pd para fase de crescimento e 19% de PB e 0,40% de Pd para fase de termina o). A redu o da PB em quatro unidades percentuais reduziu a excre o, e aumentou a reten o de ni
La adaptabilidad fenotípica de genotipos de camote provenientes de semillas botánicas en el sur del Estado de Tocantins
Bruno Silva Amorin,Gilberto Iris Souza,Márcio Antonio Silveira,Ildon Rodrigues Nascimento
Pesquisa Aplicada & Agrotecnologia , 2012, DOI: 10.5777/1499
Abstract: Objetivou-se com este trabalho estimar a adaptabilidade de genótipos de batata-doce com aptid o para a produ o de etanol em duas épocas de cultivo na regi o Sul do Tocantins. Foram avaliados 22 genótipos de batata-doce, sendo 20 genótipos provenientes de sementes botanicas de um campo de policruzamento e duas cultivares selecionados para a produ o de etanol (Marcela e Ana Clara) durante os anos agrícolas 2008/09 e 09/10. A colheita foi realizada 150 dias após o plantio e as características avaliadas foram: produtividade total de raízes; massa média e incidência de danos por insetos do solo. Constatou-se diferen a significativa em todas as características. Com rela o à produtividade e a massa média das raízes, os genótipos BDGU#36; BDGU#78 e BDGU#89 s o indicados a ambientes desfavoráveis. A maior parte dos genótipos com produtividade média de raízes significativa s o adaptados em ambientes com utiliza o de baixa tecnologia. Apenas o genótipo BDGU#93 pode ser indicado como de adaptabilidade geral para ambientes em rela o à massa média de raízes. El objetivo de este trabajo ha sido de estimar la capacidad de adaptación de los genotipos de camote (patata dulce) con aptitud para producir etanol en dos temporadas de crecimiento en el sur de Tocantins. Un total de 22 genotipos de camote, 20 genotipos de semilla botánica de un campo policruces y dos cultivares seleccionados para la producción de etanol (Marcela y Ana Clara) durante los a os 2008/09 y 09/10. Las plantas se cosecharon 150 días después de la siembra y las características evaluadas fueron: rendimiento total de las raíces, peso y incidencia de los da os derivados de insectos del suelo. Se encontraron diferencias significativas en todas las características evaluadas. Con respecto a la productividad y la masa media de raíces, los genotipos BDGU # 36; BDGU # 78 y # BDGU 89 se indican a ambientes desfavorables. La mayoría de los genotipos con un rendimiento medio significativo de las raíces están adaptadas a ambientes con baja utilización de la tecnología. El genotipo BDGU # 93 se puede establecer como de capacidad de adaptación a los ambientes en general en relación con la masa media de las raíces.
ADI O DE FITASE EM RA ES COM DIFERENTES NíVEIS DE ENERGIA METABOLIZáVEL, PROTEíNA BRUTA E FóSFORO DISPONíVEL PARA FRANGOS DE CORTE DE 1 A 21 DIAS
Renata Ribeiro Alvarenga,Adriano Kaneo Nagata,Paulo Borges Rodrigues,Márcio Gilberto Zangeronimo
Ciência Animal Brasileira , 2011,
Abstract: The objective of this study was to evaluate the performance and the pollutant excretion of broilers from 1 to 21 days of age fed diets with different levels of metabolizable energy (MEn), crude protein (CP) and available phosphorus (aP), supplemented with amino acids and phytase. To evaluate the performance, 1,350 Cobb broilers at one day of age (weight of 45.5 ± 0.9g) were distributed in a completely randomized design in a 4x2+1 factorial arrangement (four levels of MEn – 2,850; 2,950; 3,050 and 3,150 kcal/kg – and two of CP and aP – 17 with 0.34% and 19 with 0.25%, respectively, all with phytase, and an additional treatment – control, without phytase, with 21% PB, 3,000 kcal/kg MEn and 0.46% aP), in six replications with 25 birds. To evaluate the excretion of pollutants, 270 broilers at 14 days of age were allotted in metabolic cages in groups of five during seven days, using the same statistical design. Although the use of phytase reduced phosphorus and copper excretion, it decreased weight gain and increased feed conversion ratio in all studied nutritional plans. In phytase-diets, the energetic levels linearly reduced feed intake and improved feed conversion ratio and calcium and potassium excretion. Energy reduced the nitrogen, phosphorus and zinc excretion only in 17% CP and 0.34% aP diets. Crude protein reduction in phytase-diets improved feed conversion ratio and reduced nitrogen and potassium excretion. It was concluded that phytase decreases broiler performance until the third week of age when combined with reduced levels of CP and aP in diets.
Herb-Drug Interaction of Paullinia cupana (Guarana) Seed Extract on the Pharmacokinetics of Amiodarone in Rats
Márcio Rodrigues,Gilberto Alves,Nulita Louren?o,Amílcar Falc?o
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/428560
Abstract: Paullinia cupana is used in weight-loss programs as a constituent of medicinal/dietary supplements. This study aimed to assess a potential herb-drug interaction among a standardized (certified) Paullinia cupana extract and amiodarone (narrow therapeutic index drug) in rats. In a first pharmacokinetic study rats were simultaneously coadministered with a single dose of Paullinia cupana (821?mg/kg, p.o.) and amiodarone (50?mg/kg, p.o.), and in a second study rats were pretreated during 14 days with Paullinia cupana (821?mg/kg/day, p.o.) receiving amiodarone (50?mg/kg, p.o.) on the 15th day. Rats of the control groups received the corresponding volume of vehicle. Blood samples were collected at several time points after amiodarone dosing, and several tissues were harvested at the end of the experiments (24?h after dose). Plasma and tissue concentrations of amiodarone and its major metabolite (mono-N-desethylamiodarone) were measured and analysed. A significant reduction in the peak plasma concentration (73.2%) and in the extent of systemic exposure (57.8%) to amiodarone was found in rats simultaneously treated with Paullinia cupana and amiodarone; a decrease in tissue concentrations was also observed. This paper reports for the first time an herb-drug interaction between Paullinia cupana extract and amiodarone, which determined a great decrease on amiodarone bioavailability in rats. 1. Introduction Paullinia cupana, commonly known as Guarana, is a climbing evergreen vine with small fruits and is native to the Amazon region [1, 2]. Paullinia cupana seed extracts have been used in folk medicine since pre-Columbian times as stimulants, aphrodisiacs, and tonics [2]. The seeds of Paullinia cupana contain large amounts of methylxanthines (caffeine, theophylline, and theobromin), saponins, and polyphenols, especially tannins, as well as trace concentrations of many other compounds [3–5]. These constituents are probably responsible for the use of Paullinia cupana seed extract in popular medicine as a stimulant of the central nervous system, in cases of physical and mental stress, and as an antidiarrheic, diuretic, and antineuralgic [5]. Its high caffeine content and stimulating properties make Paullinia cupana particularly attractive in weight-loss programs since it helps increase the metabolic rate and can improve thermogenesis. Indeed, Paullinia cupana (Guarana) containing products are popular among athletes because of their ergogenic and “fat burning” effects [6]. Some studies have shown that Paullinia cupana positively affects lipid metabolism [1], enhances
Amino acid reduction in broiler diets supplemented with phytase and elaborated according to different nutritional plans
Oliveira, Jeferson Eder Ferreira;Rodrigues, Paulo Borges;Alvarenga, Renata Ribeiro;Zangeronimo, Márcio Gilberto;Lima, Gustavo Freire Resende;
Ciência e Agrotecnologia , 2012, DOI: 10.1590/S1413-70542012000200012
Abstract: the need for suitable diets in chickens, considering the ideal protein concept associated with phytase, is important in order to improve the productivity of birds. the aim of this study was to assess the need for the correction of amino acid levels in the diets of broilers, by using different combinations of crude protein (cp) supplemented with phytase. for performance, eight days old cobb 875 broiler chicks, with initial body weights of 155 ± 1.4g were used. the birds were distributed in a completely randomised design with seven treatments (nutritional plans) and five replicates of 25 birds. for the metabolism trial, 300 birds were selected which were also distributed using the same design, but with five, four and three birds per experimental stage: 8-21 days, 22-35 days and 36- 42 days. the nutritional plans consisted of different combinations of cp in diets with reduced calcium and phosphorus, supplemented with phytase and amino acids. the reduction of amino acids in diets with reduced levels of cp resulted in an increased intake, feed conversion and abdominal fat level, and decreased the yield of thigh + drumstick. the inclusion of phytase reduced the excretion of calcium and phosphorus, but increased nitrogen excretion when the cp was not reduced. as a result, this study concluded that the reduction of amino acids to 3.5%, supplemented with phytase and prepared according to a nutritional plan does not improve the performance and carcass characteristics of broilers, although it may reduce the emission of polluting elements by excreta.
Redu??o do nível de proteína bruta da ra??o com suplementa??o de aminoácidos sintéticos para leit?es na fase inicial
Zangeronimo, Márcio Gilberto;Fialho, Elias Tadeu;Lima, José Augusto de Freitas;Rodrigues, Paulo Borges;Murgas, Luis David Solis;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000300030
Abstract: the effects of reducing dietary cp and soybean meal levels on performance, n excretion, organs weight and diarrhea incident were evaluated in pigs supplemented with amino acids. the diets contained four levels of cp (21.0, 19.5, 18.0, and 16.5%) and were supplemented with synthetic amino acid (lysine, metionine and treonine). in experiment i, eight crossbred (ld x lw) castrated males (initial weight = 22 kg) were individually allotted to a randomized block design, with split plot arrangement to determine n balance. no significant changes in amount of n ingested and excreted in the feces were observed among the treatments. however, the treatments linearly decreased n excreted in the urine, as dietary cp decreased. in experiment ii, 60 pigs (initial weight = 8.5 kg) were assigned to a randomized blocks design with 4 x 3 factorial arrangement (four diets and three slaughter ages), with five blocks and one animal per unit experimental, to evaluate the relative weights of liver, spleen and pancreas and intestinal morfometry during the first three post weaning weeks. no significant differences on these parameters were observed across the treatments, whereas crypt depth changed in the first post weaning week, that showed cubic effect. in experiment iii, 60 animals (initial weight = 8,0 kg) were allotted to a randomized blocks design, with five blocks and three animals per experimental unit, to evaluate the performance and diarrhea incidence. no significant differences on these parameters were observed across the treatments. pigs fed diet with 16.5% cp showed decreasing diarrhea incidence. reducing the dietary cp levels from 21 to 16.5% for pigs in the nursery phase decreased n excretion in the urine and diarrhea incidence with no changes on performance and physiologic parameters of piglets from 8 to 25 kg bw.
Desempenho e excre??o de nitrogênio de leit?es dos 9 aos 25 kg alimentados com dietas com diferentes níveis de lisina digestível e proteína bruta
Zangeronimo, Márcio Gilberto;Fialho, Elias Tadeu;Murgas, Luis David Solis;Freitas, Rilke Tadeu Fonseca de;Rodrigues, Paulo Borges;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000600022
Abstract: two experiments were conducted to evaluate dietary levels of crude protein (cp) and digestible lysine (lysd) on the performance and nitrogen (n) excretion of piglets in the initial phase. in experiment 1, 80 barrows and females (initial weight of the 9.1 kg ± 1.2 kg and final weight of the 21.5 ± 4.8 kg), crossbred (landrace x large white), were distributed to a randomized blocks in factorial scheme 2 x 4 (two levels of cp 16 and 18% - and four levels of lysd (0.7; 0.9; 1.1 and 1.3%) with five replications and two animals per experimental unit, during 35 days. the average daily weight gain (adg), average daily feed intake (adfi) and feed:gain ratio (f:g) were evaluated. in experiment 2, 32 barrows (25.0 ± 1.3 kg), from experiment i, were individually allotted in metabolic cages (experimental unit), during 11 days, to evaluate the ingested n, n in feces and n in urine . the diets were formulated with corn, soybean meal and modified powder milk, supplemented with vitamins and minerals. the amino acids methionine and threonine were corrected in function of the lysine levels, following the ideal protein concept. no interaction lysd x cp was observed for neither studied variable. average daily gain and f:g showed a quadratic effect for the lysd levels and were better in the animals fed diets with levels of 1.04 and 1.09%, respectively. the levels of n in the fezes showed crescent linear effect with the lysd and cp levels, while the n levels in the urine showed quadratic effect with lysd levels, with lower excretion for the level of 1.03% in the ration. no influence was observed for lysd and cp level on adfi and n in fezes. the level of 1.05% lysd in diets with 16 and 18% cp provide best performance and lower excretion of de n in dejects of the swine.
Níveis de proteína e fósforo em ra??es com fitase para frangos de corte, na fase de 14 a 21 dias de idade: 2. valores energéticos e digestibilidade de nutrientes
Silva, Yolanda Lopes da;Rodrigues, Paulo Borges;Freitas, Rilke Tadeu Fonseca de;Zangeronimo, Márcio Gilberto;Fialho, Elias Tadeu;
Revista Brasileira de Zootecnia , 2008, DOI: 10.1590/S1516-35982008000300012
Abstract: a digestibility assay was carried out to determine the apparent metabolizable energy values (amen), dry matter digestibility coefficients (dmdc), the excretion and apparent retention coefficient of phosphorus (p), nitrogen (n), calcium (ca), potassium (k), copper (cu) and zinc (zn), using 250 cobb male broiler chickens receiving the treatments distributed in a factorial schedule 3 ′ 3 + 1 (available phosphorus level - 0.25; 0.34 and 0.45% and crude protein level [cp]- 15.0; 17.0 and 19.0% and a control diet, with normal nutritional levels), with five replicates of five birds each. in the diets with reduced levels of available phosphorus (ap), 500 ftu of phytase were added and calcium requirement was reduced in 17%. except for control treatment, all the diets were formulated on digestible amino acids basis. the energetic values of the diets with 15.0 and 17.0% cp, independently of the ap levels used or the phytase supplementation, presented higher amen that the control diet possibility regarding to supplemental amino acids addition. the dmdc of the diets with reduced cp levels and different levels of ap were higher than the control diet. the cp reduction in the diet associated to lower ap levels and phytase enzyme supplementation allowed to reduce the minerals excretion, which showed better retention coefficients, except for zinc that presented lower retention coefficient than the the control diet. however, all minerals excretion, as relatively compared to the control diet, was minimized when lower levels of cp and ap was used in the diet, supplemented with phytase. the manipulation of the protein and phosphorus levels in diets supplemented with amino acids and phytase could reduce mainly the excretion of nitrogen, p and cu, minimizing the environment pollution caused by these elements.
Nitrogen, calcium and phosphorus balance of broilers fed diets with phytase and crystalline amino acids
Gomide, Elisangela Minati;Rodrigues, Paulo Borges;Zangeronimo, Márcio Gilberto;Bertechini, Ant?nio Gilberto;Santos, Luziane Moreira dos;Alvarenga, Renata Ribeiro;
Ciência e Agrotecnologia , 2011, DOI: 10.1590/S1413-70542011005000003
Abstract: the objective of this study was to evaluate the effect of reduced-crude protein (cp) and available phosphorus (ap) diets, added with phytase and amino acids for broilers in the growing (14 to 21 days old) and retirement (35 to 42 days) phases on nitrogen, potassium and phosphorus balance. ninety cobb broilers were distributed in a completely randomized design with three treatments and six replications with five and three birds per experimental unit in the growing and retirement phases, respectively. diets were elaborated to contain reduced cp and ap levels (19 and 17% cp in the growing phase, with 0.34% ap; and 18 and 16% cp in the retirement phase, with 0.30% ap), supplemented with crystalline amino acids and 500 ftu of phytase/kg diet. these were compared to a control diet (21% cp and 0.46% ap for growing phase and 19% cp and 0.40% ap for retirement phase). the reduction of cp in four percentual units reduced the n excretion and increased the retention of this element, showing that the phytase had no influence on n balance when used the crystalline amino acids in the diets. the phytase reduced the p excretion and increased the retention ones. the potassium excretion decreased in reduced-cp diets, but this excessive reduction decreased the retention of this element, except in the retirement phase. it was concluded that the reduced-cp and ap diets, supplemented with phytase and amino acids, are efficient in reducing the pollutant power of the broilers excrements in the growing and retirement phases of production.
Energy and protein levels in diets containing phytase for broilers from 22 to 42 days of age: performance and nutrient excretion
Nagata, Adriano Kaneo;Rodrigues, Paulo Borges;Alvarenga, Renata Ribeiro;Zangeronimo, Márcio Gilberto;Rodrigues, Kênia Ferreira;Lima, Gustavo Freire Resende;
Revista Brasileira de Zootecnia , 2011, DOI: 10.1590/S1516-35982011000800014
Abstract: this study was conducted in order to evaluate the influence of different levels of metabolizable energy and crude protein in diets formulated according to the ideal protein concept with phytase supplementation on performance and nutrient excretion of broilers from 22 to 42 days age. it was used 1,500 coob lineage broilers at 22 days of age and with initial weight of 833 ± 7g, distributed in completely randomized design in a 3 × 3 + 1 factorial scheme composed of three levels of correct apparent metabolizable energy (2,950; 3,100 and 3,250 kcal/kg), three levels of crude protein (14, 16 and 18%) and a control treatment, totaling ten treatments with six repetitions of 25 birds each. all diets, with the exception of the control, were supplemented with phytase. for determination of excretion of pollutants, it was used 180 broilers from the same lineage at 35 days of age,placed in metabolic cages, with ten treatments each one with six repetitions and three birds per experimental unit. the protein and energy levels in diets containing phytase influenced feed intake, weight gain, feed conversion and excretion of nitrogen, phosphorus, calcium, potassium, copper and zinc by the birds. the corrected apparent metabolizable energy level in the diets for broilers in the studied period must be increased up to 3,250 kcal/kg of metabolizable energy and the levels of crude protein, calcium and phosphorus must be reduced down to 18, 0.70 and 0.31%, respectively, provided that supplemented with amino acids and phytase to improve the performance and to reduce excretion of pollutants by birds.
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