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Search Results: 1 - 10 of 388639 matches for " Marcelo Luís Gomes;Costa "
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Exigências nutricionais de lisina para codornas durante a fase de postura, em fun o do nível de proteína da ra o
Ribeiro Marcelo Luís Gomes,Silva José Humberto Vilar da,Dantas Manuel de Oliveira,Costa Fernando Guilherme Perazzo
Revista Brasileira de Zootecnia , 2003,
Abstract: O experimento objetivou estimar as exigências de lisina total e a rela o lisina: proteína em codornas, na fase de produ o. Foram utilizadas 320 codornas, resultado do cruzamento entre a codorna japonesa e a européia de 60 a 144 dias de idade, com peso vivo médio de 178+12 g, alimentadas com ra es contendo 20 e 23% de proteína bruta (PB) e, 0,80; 0,95; 1,10; 1,25 e 1,40% de lisina. O delineamento experimental foi o inteiramente ao acaso em esquema fatorial 2x5 (dois níveis de PB x cinco níveis de lisina), que resultou em dez tratamentos, cada um com quatro repeti es de oito aves. As codornas foram submetidas a um programa de luz de 17 horas de dura o e alimentadas à vontade. As variáveis estudadas foram obtidas em quatro períodos de 21 dias. Houve efeito quadrático dos níveis de lisina sobre a produ o de ovos, sendo a exigência e o consumo, respectivamente, de 1,07% e 287 mg de lisina/dia com 20%PB e de 1,15% e 321 mg de lisina/dia com 23%PB. O nível de 23%PB aumentou o consumo de ra o, produ o, peso e massa de ovos e também melhorou a convers o alimentar por massa e dúzia de ovos. As rela es lisina: PB n o foram alteradas, sendo de 5,3 e 5,0%, respectivamente, com 20 e 23% de PB na ra o. Os resultados do presente estudo sugerem aumento quantitativo da exigência de lisina de codornas na fase de produ o, mas n o da rela o lisina: PB, à medida que a concentra o de PB na ra o é elevada.
Spectrophotometric determination of uranium using 2-(2- Thiazolylazo)-p-Cresol (TAC) in the presence of surfactants
Teixeira, Leonardo Sena Gomes;Costa, Antonio Celso Spínola;Ferreira, Sérgio Luís Costa;Freitas, Maria de Lourdes;Carvalho, Marcelo Souza de;
Journal of the Brazilian Chemical Society , 1999, DOI: 10.1590/S0103-50531999000600016
Abstract: a sensitive and selective spectrophotometric method is proposed for the rapid determination of uranium using 2-(2- thiazolylazo)-p-cresol (tac). the reaction between tac and uranium (vi) is instantaneous at ph 6.5 and the absorbance remains stable for over 3 h. n-cetyl-n,n,n-trimethylamonium bromide (ctab) and triton x-100 are used for increasing the sensitivity and solubility of the system respectively. the method allows the determination of uranium in the range from 0.30 to 12.0 mg ml-1 with a molar absorptivity of 1.31 x 104 l mol-1 cm-1 and features a detection limit of 26 ng ml-1 at 588 nm. the selectivity of the reagent was improved by the use of (1,2-cyclohexylenedinitrilo) tetraacetic acid (cydta) as masking agent. the proposed method has been successfully applied to the determination of uranium in mine drainage waters. the precision (r.s.d. < 2%) and the accuracy obtained were satisfactory.
Resíduo da semente de urucum (Bixa orellana L.) como corante da gema, pele bico e ovário de poedeiras avaliado por dois métodos analíticos
Silva, José Humberto Vilar da;Silva, Edson Lindolfo da;Jord?o Filho, José;Ribeiro, Marcelo Luís Gomes;Costa, Fernando Guilherme Perazzo;
Ciência e Agrotecnologia , 2006, DOI: 10.1590/S1413-70542006000500024
Abstract: a experiment was carried out in the poultry science station of cft/ufpb with the objective to evalluate the annatto seeds bran (asb) as an ingredient and as an additive colouring of several tissue in 125 hens lohmann lsl with twenty-two weeks of age, 1.65 kg of live weight, allocated in the completely randomized design, with five treatments and five replication of five hens. the treatment 1 (t1) = diet based on corn and soybean meal; t2 = diet + 40% of sorghum; t3 = t2 + 4% asb; t4 = t2 + 8% asb; e t5 = t2 + 12% asb. the birds were fed 110 g of diet/day and water ad libitum. the collect were obtained in three periods of twenty-eight days. collor changes were measured with yolk the roche? collor fan method (m1) and score calculated from "b+" (yellowness) of minolta? cr-10 instrument (m2). excepting the t1 and t2 of analysis of variance, the increase of asb in diet with 40% of sorghum improved, linearly, intake, egg production, egg mass, egg mass and egg dozen feed conversion ratio. the yolk color by m1 and m2, beak by m2 and ovary by m1 improved with the increasing of asb in diets. a high correlation coefficient (r = 0.72; p < 0.001) was observed for yolk collor among m1 and m2. suggested up to 12% of asb in diet where sorghum is principal source of energy to improve yolk pigmentation and egg production.
Níveis de sódio na ra??o de frangas de 7 a 12 semanas de idade
Ribeiro, Marcelo Luís Gomes;Silva, José Humberto Vilar da;Araújo, José Anchieta de;Rodrigues, Paulo Borges;Costa, Fernando Guilherme Perazzo;Jord?o Filho, José;
Ciência e Agrotecnologia , 2008, DOI: 10.1590/S1413-70542008000400041
Abstract: the experiments were carried out to determine sodium requirements for light (ls) and egg-brown (ebs) pullets from 7 to 12 weeks of age. it was used a completely randomized design according to a 6x2 factorial (sodium levels: 0.04; 0.10; 0.16; 0.21; 0.27 and 0.32% x 2 strains), with five replicates of six pullets per experimental unit. feed intake, water intake, daily weight gain, feed: gain ratio, rectal temperature, and comb size were evaluated, as well as feces dry matter and humidity. in the two experiments, there was no interaction (p>0.05) between sodium levels (sl) and strains on the studied variables. feed intake was not affected by ls, but it was greater in ebs than in ls birds (p <0.05). ls had significant effects on daily weight gain and feed: gain ratio according to the quadratic model, and comb size was greater in ls compared to ebs birds. the increase in dietary sodium levels increased water intake and feces humidity, whereas feces dry matter decreased. rectal temperature was not affected by the treatments. for sl and ebs, it is recommended 0.22% na or a daily intake of 123 and 140 mg of sodium, respectively, from 7 to 12 weeks of age.
Inclus?o de ovo desidratado em ra??es para frangos de corte nas fases pré-inicial e de crescimento
Teixeira, Elisanie Neiva Magalh?es;Silva, José Humberto Vilar da;Ribeiro, Marcelo Luís Gomes;Costa, Fernando Guilherme Perazzo;Jord?o Filho, José;Araujo, Daniel de Magalh?es;
Revista Brasileira de Zootecnia , 2008, DOI: 10.1590/S1516-35982008000700018
Abstract: the experiment was carried out to determine the optimum inclusion level of dried egg powder (degg) in the pre-initial and growing rations of broilers. male cobb-500 chicks (n= 1,152) with initial live weight of 43.46 ± 0.23 g were housed in cages of 1,0 × 1,5 m. a completely randomized design with four rations 0, (0.5, 1.0 and 1.5% of degg), each one with 18 replications of 16 birds. isoproteic and isoenergetic rations were used, with 21.9% cp and 2,950 kcal amen from 1 to 7 days old and 20.9% cp and 3,000 kcal amen from 8 to 21 days old. egg contents were dried at 55oc for 72 hours and were negative for salmonella spp. dried egg powder inclusion levels showed a quadratic effect on feed intake, live weight, weight gain and feed conversion. weight gain was obtained with the use of 0.53% dried egg powder in the ration in the pre-starter and 0.73% in the initial growth phase.
Inclus?o do ovo desidratado em ra??es peletizadas ou fareladas para frangos de corte
Teixeira, Elisanie Neiva Magalh?es;Silva, José Humberto Vilar da;Costa, Fernando Guilherme Perazzo;Ribeiro, Marcelo Luís Gomes;Araujo, Daniel de Magalh?es;Jord?o Filho, José;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000600021
Abstract: the experiment was carried out to evaluate the effect of physical form diet (mash or pelleted) and inclusion of dehydrated egg (degg) up to 21 days of age on the performance and carcass characteristic of cobb-500 strain of broiler chicks at 42 days of age. the birds with average weight of 42.94 ± 0.51 g were allotted in pens of 1.0 x 1.5 m. the experimental design was completely randomized in factorial arrangment with two levels of degg (0 and 0.5%) and two physical form of diet (mash and pellet), resulting in four diets with 18 replicates of 16 birds during the phases from 1 to 7; 8 to 21; 22 to 33 and 34 to 42 days of age. the degg inclusion in the pre initial and initial diets did not influenced the performance, but the pelleted diet improved the performance of for broiler chicks up to 42 days. the pelleted diet also improved breast, pectoralis minor and fillet of breast yields in relationship to carcass weight, and increased the proventriculus and small intestine weights, while the mashed diet increased the gizzard weight.
Exigência de lisina para poedeiras semipesadas durante o pico de postura
Filho, José Jord?o;Silva, José Humberto Vilar da;Silva, Edson Lindolfo da;Ribeiro, Marcelo Luís Gomes;Costa, Fernando Guilherme Perazzo;Rodrigues, Paulo Borges;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000600021
Abstract: an experiment was carried out as a completely randomized design, with seven treatments, and six replicates of six birds to determine the lysine nutritional requeriments for 252 semi-heavy laying hens. the diets were formulated to be isonitrogenous (17.1%cp) and isoenergy (2,800 kcal/kg-me) and to meet all bird nutrient requeriments, with the exception of lysine, that was supplemented with l-lysine ? hcl (78.4% of lysine) and resulted in the following levels: 0.79, 0.83, 0.87, 0.91, 0.95, 0.99, and 1.03% of total lysine. the performance variables were evaluated from 30 to 46 weeks of age, that correspond to the peak of egg production in commercial hens. quadract effect of treatments on egg production, egg weight and egg dozen:feed ratio was observed. the total lysine requeriments were of 0.92, 0.91, and 0.90, that was correspondent to the estimate of 0.84, 0.83, and 0.82% of digestible lysine, respectively. it is recommended levels of 0.92 or 0.84% or intake of 996 or 910 mg of total and digestible lysine/bird/day, during the peak of egg production.
Exigência de sódio para poedeiras no final do primeiro ciclo e durante o segundo ciclo de postura
Ribeiro, Marcelo Luís Gomes;Silva, José Humberto Vilar da;Araujo, José Anchieta de;Martins, Terezinha Domiciano Dantas;Costa, Fernando Guilherme Perazzo;Givisiez, Patrícia Emília Naves;
Revista Brasileira de Zootecnia , 2008, DOI: 10.1590/S1516-35982008000700017
Abstract: two experiments were carried out to estimate sodium requirements for brown-eggs laying hens in the late first and during second egg-production cycle. a completely randomized design was used, with seven sodium levels (0.08, 0.13, 0.18, 0.23, 0.28, 0.33 and 0.38%), six replications of six birds in the late first egg-production cycle and five replications of six birds in the second egg-production cycle. in the late first egg-production cycle, sodium levels (sl) had no effect on feed intake (fi), egg weight (ew), egg dozen feed conversion (edc) and egg-shell specific gravity (sg). the sl showed quadratic effect on egg production (ep), egg mass (em) and egg mass feed conversion (emc), that resulting in sodium requirements (sr) of 0.21, 0.22 and 0.21%, respectively. in the second egg-production cycle, sl had no effect on ew and sg. however, ep, em, emc and edc improved when the levels of sodium were 0.20, 0.19, 0.18 and 0.19%, respectively. considering the estimates of sodium requirements to egg production and egg mass feed conversion, could be suggests 0.22% e 0.20% as maximum sodium levels, respectively, to late first and second egg-production cycle.
Efeito da substitui??o dos antimicrobianos pelo ovo desidratado na fase pré-inicial de frangas de dois grupos genéticos alojadas em camas nova e reciclada
Silva, José Humberto Vilar da;Jord?o Filho, José;Silva, Edson Lindolfo da;Ribeiro, Marcelo Luís Gomes;Araújo, José Anchieta de;Costa, Fernando Guilherme Perazzo;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000700027
Abstract: the effect of antimicrobial (a) replacement with dehydrated egg (de) and of type of litter (new and recycled) used in the floor covering on pullet performance was evaluated in 1,440 1-d chicks, 720 of each strain (white and brown), allotted to 72 boxes (1 x 1.5 m). recycled litter consisted of sugar cane bagasse containing droppings of broilers chicks with symptoms of coccidiose. the pullets were weighed and assigned to a complete randomized design with a 3 x 2 x 2 (three diets x two litter x two strains) factorial arrangement, in a total of 12 treatments with six replications of 20 pullets. the experimental diets (d) were: d1 = diet with commercial dose of antimicrobial; d2 = diet without antimicrobial; and d3 = diet without antimicrobial + 0.6% of de. de was composed by dehydrated yolk+albumen (55°c for 72 hours) and showed negative result to samonella spp. test. the use of recycled litter decreased pullet performance of two genetic groups, specially the brown ones, that showed lower weights of spleen and bursa of fabricius. this fact suggests better enlargement of lymphoid tissues, and that probably explains the smaller tolerance of white pullets to recycled litter. the antimicrobials minimize negative effect of recycled litter on pullet performance. dehydrated egg is a good alternative to antimicrobials and can improve performance of pullets in the pre-starter on conventional environment.
Redu??o dos níveis de proteína e suplementa??o aminoacídica em ra??es para codornas européias (Coturnix coturnix coturnix)
Silva, Edson Lindolfo da;Silva, José Humberto Vilar da;Jord?o Filho, José;Ribeiro, Marcelo Luís Gomes;Costa, Fernando Guilherme Perazzo;Rodrigues, Paulo Borges;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000300027
Abstract: the effects of feeding nine nutrition plans (np) on the performance of 576 quails, allotted to a completely randomized design with nine treatments of four replicates of 16 birds, were evaluated in this trial. the following np were analyzed from 1 to 21 days of age: np1 = 28% of crude protein (cp), 1.5% lysine (l) and 1.1% methionine + cystine (mc) from 1 to 21 days and 24%cp, 1.3%l and 0.9% mc from 22 to 42 days (control); np2 = 25.2% cp, 1.23% l and 0.83% mc from 1 to 21 days and of 21.6% cp, 1.0% l and 0.74% mc from 22 to 42 days; np3 = 22.4% cp, 0.71% mc from 1 to 21 days and 1.2% l and 19.2% cp, 0.64% mc and 0.95% l from 22 to 42 days; np4 = np2+l; np5 = np3+l; np6 = np2+mc; np7 = np3+mc; np8 = np2+l+mc; and np9 = np3+l+mc. the diet supplementation from np4 to np9 with l, mc or l+mc aimed to provide values of l and mc similar to np1. diets (2,900 kcal me/kg ) and water were fed ad libitum in both phases. from 1 to 21 days, decreasing dietary crude protein levels from 28 to 22.4% also reduced intake, body weight, weight gain, but did not affect feed conversion. the dietary supplementation with mc increased bird performance. the recommended level of l (1.5%) in a deficient diet in cp (19.2%) and mc (0.71%) decreased quail growth from 1 to 21 days of age. however, meeting the mc requirements decreased dietary cp levels from 28 to 22.4% and from 24 to 19.2%, respectively, for quails from 1 to 21 and 22 to 42 days of age, independent of the lysine supplementation.
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