oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
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.
Utiliza o de promotores de crescimento para frangos de corte em ra es fareladas e peletizadas = Utilization of growth promoter for broiler chickens in mashed and pellets diets
Letícia Loren?on,Ricardo Vianna Nunes,Paulo Cesar Pozza,Magali Soares dos Santos Pozza
Acta Scientiarum : Animal Sciences , 2007,
Abstract: Avaliou-se o efeito da suplementa o de dietas com diferentes promotores de crescimento sobre o desempenho e rendimento de carca a de frangos de corte de 1 a 42 dias de idade. Foram utilizados 576 pintos da linhagem Cobb 500, machos, alojados em cama reutilizada, distribuídos em um delineamento inteiramente casualizado, em esquemafatorial 2 x 3 (forma física da ra o x diferentes promotores de crescimento), totalizando 6 tratamentos, com 6 repeti es e 16 aves por unidade experimental. As características de desempenho avaliadas foram ganho de peso, peso final, consumo de ra o, convers o alimentar, mortalidade e o índice de eficiência produtiva. Avaliou-se também o rendimento de carca a, bem como rendimento em cortes, cora o, fígado e gordura abdominal. Os resultados obtidos demonstram n o haver efeito dos tratamentos estudados sobre as características de desempenho e rendimento de carca a. This study evaluated the supplementation effect of diets with different growth promoters on the performance and carcass yield in broilers from 1 to 42 days of age. Five hundred seventy six broilers of the Coob 500 lineage were used, all males, lodged in reused litter, allocated according to a completely randomized design in a 2 x 3 factorial scheme (physical forms of the ration x growth promoters), totalizing 6 treatments, 6 repetitions per treatment and 16 broilers per experimental unit. The performance parameters evaluated were weight gain, final weight, feed consumption, feed conversion, mortality and index productive efficiency. The carcass yield was also evaluated, as the cuts yield and percentage of abdominal fat at 42 days. The results demonstrated no effect of thetreatments studied on the performance characteristics and carcass yield.
Desempenho de leit es submetidos a diferentes níveis de substitui o da proteína do farelo de soja pela proteína do ovo desidratado = Performance of piglets submitted to different replacement levels of soybean meal protein by dehydrated egg protein
Janaína de Cássia Braga Arruda,Terezinha Domiciano Dantas Martins,José Humberto Vilar da Silva,Ludmila da Paz Gomes da Silva
Acta Scientiarum : Animal Sciences , 2008,
Abstract: Objetivou-se determinar o ganho de peso, o consumo de ra o e a convers o alimentar de suínos em fase inicial (15 a 30 kg de peso) alimentados com quatro diferentes níveis de substitui o (0, 3, 6 e 9%) da proteína do farelo de soja pela proteína do ovo desidratado. Foram utilizados 32 suínos (16 machos castrados e 16 fêmeas) em um delineamento em blocos casualizados, com quatro tratamentos e quatro repeti es cada, em que a unidade experimental foi composta por um macho e uma fêmea. Os tratamentos foram 0, 3, 6 e 9% de proteína do ovo desidratado em substitui o à proteína do farelo de soja. Os dados obtidos foram submetidos à regress o linear para os níveis de 3, 6 e 9% de ovo desidratado, e o tratamento-testemunha (0%) foi comparado com os demais aplicando o teste Dunnet a 5% de probabilidade. Os níveis de substitui o da proteína do farelo de sojapela proteína do ovo desidratado n o influenciaram as variáveis de desempenho dos animais na fase inicial, até 9%. Entretanto, avaliando a rela o custo-benefício, o tratamentocontrole foi o mais rentável. This study aimed to determine the average daily weight gain, daily feed intake and the feed conversion ratio of pigs in initialphase (15 to 30 kg of weight) fed with four different levels of substitution (0, 3, 6 and 9%) of soybean meal protein by dehydrated egg protein. Thirty-two pigs (16 castrated males and 16 females) were used in a completely randomized blocks statistical design, with fourtreatments and four repetitions each; the experimental unit was composed by a male and a female. The treatments were 0, 3, 6 and 9% of dehydrated egg protein in replacement of soybean meal protein. The data obtained were subjected to linear regression for the levels 3,6 and 9% of dehydrated egg; the witness (0%) was compared with the other treatments applying Dunnett’s test at 5% probability. The replacement levels of soybean meal protein by dehydrated egg protein did not influence the performance variables of the animals in theinitial phase, up to 9%. However, when evaluating the cost-benefit ratio, the control treatment was the most profitable one.
Efeito do tempo de jejum pós-eclos?o, valores energéticos e inclus?o do ovo desidratado em dietas pré-iniciais e iniciais de pintos de corte
Teixeira, Elisanie Neiva Magalh?es;Silva, José Humberto Vilar da;Costa, Fernando Guilherme Perazzo;Martins, Terezinha Domiciano Dantas;Givisiez, Patrícia Emília Naves;Furtado, Dermeval Araújo;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000200014
Abstract: two experiments were carried out to determine the nutritional value of the dried egg (degg), and the effect of the post-starvation hatching time (psht) and the inclusion of dried egg powder in the diet of broiler chicks. in experiment 1, 120 male ross-308 broiler chicks were housed according to a completely randomized design into three treatments and five repetitions of eight birds each. excreta collection was daily performed from 24 to 29 days of age in the morning and afternoon. in experiment 2, a sex-mixed batch of 810 cobb-500 chicks was used. initial weight was 33.41 ± 0.53 g, and the chicks were housed in pens measuring 1.0 × 1.5 m. a completely randomized experimental design was used with nine treatments and six repetitions of 15 birds each, according to a 3 × 3 factorial of three degg levels (0, 2 and 4%) and three psht (28, 40 and 52 hours), corresponding to: 0, 12 and 24 hours of starvation after housing, respectively. degg showed 51.54% of cp and 4,278 kcal amen/kg. from 1 to 7 days of age, the birds submitted to starvation for 40 and 52 hours showed lower live weight, weight gain and feed intake when compared to birds fed sooner (at 28 hours psht). the poorest performance was shown by birds fasted for 52 hours (24 hours of starvation after being housed). degg levels of 4% in the pre-initial diet improved the live weight in the second and third days of age. in conclusion, degg might be used from 1 to 21 days of age in broiler diets without impairing the bird performance.
Desempenho de Frangos de Corte Alimentados com Ovo em Pó  [cached]
Junqueira OM,Araújo LF,Araújo CSS,Faria DE
Revista Brasileira de Ciência Avícola , 2001,
Abstract: Um experimento foi conduzido para estudar a adi o do ovo em pó na dieta de frangos de corte no período de 1 a 28 dias, sendo dividido em duas fases (1 a 7 e 8 a 28 dias). No período de 1 a 7 dias, as aves receberam dietas contendo 0%, 5%, 10%, 15% e 20% de ovo em pó e de 8 a 28 dias de idade as aves foram distribuídas em um arranjo fatorial 2x5 (2 níveis de ovo em pó - 0% e 5% - e os 5 níveis da fase anterior). No período de 1 a 7 dias as aves do tratamento controle apresentaram melhor ganho de peso e as aves alimentadas com dietas contendo 20% de ovo em pó apresentaram menor ganho de peso e pior convers o alimentar. As aves deste mesmo tratamento apresentaram também menor peso e comprimento do intestino. Na segunda fase (8 a 28 dias) n o houve intera o entre os tratamentos estudados. O desempenho, peso e comprimento do intestino n o foram afetados pelos tratamentos, ocorrendo apenas maior peso do cora o em aves que receberam ovo em pó nesta fase. Os resultados obtidos demonstram ser economicamente inviável a utiliza o de ovo em pó na dietas de frangos de corte no período de 1 a 28 dias e pela falta de resposta que este ingrediente promove no desempenho da ave.
Influência do uso de ovo líquido pasteurizado e ovo desidratado nas características da massa alimentícia
Ormenese, Rita de Cássia S.C.;Misumi, Luciana;Zambrano, Francy;Faria, Eliete Vaz de;
Ciência e Tecnologia de Alimentos , 2004, DOI: 10.1590/S0101-20612004000200016
Abstract: the addition of egg to food pasta can be effected using fresh, frozen or dehydrated egg, the fresh form being indicated in the literature as the most appropriate form. however, the real advantage of the fresh form over the dehydrated form is not clear. the objective of this study was to compare the effect of using fresh pasteurized liquid egg with that of using dehydrated egg, on the quality of rigatoni type short pasta. nine formulations of dry pasta were evaluated, one being the control, with no addition of egg, 4 with different proportions of pasteurized liquid egg (5%, 10%, 15% and 20%) and 4 with dehydrated egg in the proportions corresponding to those used for the liquid egg (1.19%, 2.38%, 3.57% and 4.76%). the pastas obtained were evaluated with respect to their cooking characteristics (aacc 66-15, 2000), texture (ta-xt2i) and color (minolta). using sensory tests, the firmness and flavor of the different samples were evaluated, as also the acceptability of the control sample and of those with different amounts of egg. based on the results obtained, it was concluded that, under the conditions used in these tests, it was possible to produce similar products with either of the two commercialized forms of egg studied. in this way, the various advantages of dehydrated egg over liquid egg (ease of transport, storage at room temperature, reduced volume, longer shelf life, ease of mixing with wheat flour) could be used without detriment to the final product.
Evaluation of in Ovo Delivery System for Plasmid DNA Vaccination
L. Moura,M. Liu,V. N. Vakharia
International Journal of Poultry Science , 2007,
Abstract: In ovo vaccination against Marek`s Disease Virus (MDV) is a common practice in more than 85% of broilers produced in the US. DNA vaccines represent a new tool to prevent infectious diseases in many species, including poultry. An in ovo delivery system for plasmid DNA vaccines is described in which we evaluate the route of delivery (air cell vs amniotic cavity), transfection reagent (IFA+DMSO vs polyethylenimine), dose of plasmid DNA (1 to 100 μg/egg) and the nature of humoral immune responses. A plasmid DNA (CMV-EGFP-BGH) construct expressing Enhanced Green Fluorescent Protein (EGFP) under cytomegalovirus (CMV) immediate early promoter was used to optimize the route of delivery and formulation for in ovo DNA vaccination. A plasmid expressing the hemmagglutinin-neuraminidase (HN) gene of Newcastle disease virus (pIRES-HN-EGFP) was used to evaluate five different dosages of DNA and the humoral immune responses after in ovo vaccination. Higher expression of EGFP and hatchability were obtained when 18-day-old embryos were inoculated through the amniotic cavity using a cationic lipid adjuvant containing polyethylenimine (PEI-ExGen ). Transgene expression was observed even when low amounts of plasmid DNA were used (1 μg/egg). A dose-dependent response was observed with plasmid DNA concentrations of 1, 10, 25, 60 and 100 μg/egg. Better responses were detected when embryos were inoculated with 60 μg of plasmid DNA. Detectable humoral responses were observed as measured by ELISA and isotope-ELISA assays.
Forma física da ra o contendo milheto sobre a digestibilidade dos nutrientes para frangos de corte Physical form of broiler diets containing pearl millet grain on nutrient digestibility  [cached]
Thaysa Rodrigues Torres,Maria do Carmo Mohaupt Marques Ludke,Jorge Vitor Ludke,Paulo Cesar Gomes
Revista Brasileira de Saúde e Produ??o Animal , 2011,
Abstract: Objetivou-se avaliar a digestibilidade dos nutrientes em dietas com diferentes formas físicas contendo milheto gr o e moído para frangos de corte nas fases pré-inicial e inicial. O delineamento experimental foi blocos ao acaso, em arranjo fatorial 3 x 2, com três dietas formuladas (ra o sem milheto, ra o com 20% milheto gr o e ra o com 20% milheto moído) sob duas formas físicas (fareladas ou peletizadas). Foram utilizadas cinco repeti es por tratamento e seis aves por unidade experimental para determina o de digestibilidade dos nutrientes e energia metabolizável aparente e aparente corrigida para reten o de nitrogênio das dietas. Os resultados demonstraram que a energia metabolizável aparente das dietas que continham o milheto gr o ou moído n o diferem entre si (P>0,05), e o mesmo ocorreu para os valores de aparente corrigida para reten o de nitrogênio. As dietas peletizadas foram mais digestíveis, uma vez que proporcionaram melhor utiliza o do milheto gr o. This study aimed to assess the nutrient digestibility of diets with different physical forms containing whole or milled millet grain in diets for broilers in a metabolism trial in pre-initial and initial phases. The experiment structure was a randomized block design in a factorial 3 x 2 arrangement, with three diets (diet without millet and diet with 20% millet whole grain or diet with 20% ground millet) in two physical forms (mash or pelleted). There were five replicates per treatment and six birds per experimental unit for determination of nutrient digestibility and apparent metabolizable energy and apparent corrected for nitrogen balance). The results showed that the values for apparent metabolizable energy of diet with whole millet grain or ground millet not differ and the same were observed for apparent corrected for nitrogen balance. The pelleted diets were more digestible, which provided a better use of millet grain.
In ovo Vaccine Against Infectious Bursal Disease  [PDF]
L. Moura,V. Vakharia,M. Liu,H. Song
International Journal of Poultry Science , 2007,
Abstract: A recombinant attenuated vaccine against infectious bursal disease virus (IBDV) was administered in ovo to 18-day-old embryos. The vaccine was genetically tailored to protect from challenges in the field against classic and variant strains of IBDV. The vaccine virus contains neutralizing epitopes from both classic (D78) and variant strain (GLS), and abrogates expression of the nonstructural protein, VP5 of IBDV. Specific-pathogen-free (SPF) and fertile broiler eggs obtained from a local poultry farm were vaccinated and used to evaluate protection against IBDV-STC challenge. A full dose of the vaccine consisting of 5.6x103 plaque forming units (pfu) was administered to SPF and broiler embryos. In addition, a half dose of the vaccine containing 2.3x103 pfu 21 pfu 21 was injected into SPF embryos. The vaccine had no effect on hatchability or first week survival in either broilers or SPF birds, even when high doses were administered. The vaccine generated high antibody titers in chickens with either dosage. All vaccinated groups were protected against mortality. The vaccine did not cause bursal damage and fully protected SPF chickens vaccinated in ovo with half dose of the vaccine and broiler chicks that received a full dose of the recombinant vaccine in ovo.
Desempenho de sementes peletizadas de alface em fun o do material cimentante e da temperatura de secagem dos péletes  [cached]
Silva Jo?o Bosco C.,Santos Paulo E.C.,Nascimento Warley Marcos
Horticultura Brasileira , 2002,
Abstract: Sementes de alface da cultivar Grand Rapids Nacional foram peletizadas, utilizando-se como material de enchimento, a mistura de microcelulose e areia fina em volumes iguais e, como material cimentante, diferentes volumes de suspens o aquosa de bentonita e de acetato de polivinila, em cinco propor es (%): 100+0; 75+25; 50+50; 25+75; e 0+100. Os cimentantes foram aplicados em separado, sendo a bentonita aplicada na primeira camada de recobrimento das sementes. Após a peletiza o, as sementes foram submetidas à secagem sob temperaturas de 15 e 36degreesC, e avaliadas quanto à germina o e emergência das plantulas. As combina es de cimentantes utilizadas na peletiza o e a temperatura de secagem n o afetaram significativamente a porcentagem final de germina o das sementes em gerbox. Na avalia o da emergência de plantulas em bandejas, apenas duas formula es de péletes apresentaram menor taxa em rela o ao tratamento com desempenho máximo, indicando que as diferen as obtidas n o foram devidas às diferen as na formula o do recobrimento e nem à temperatura de secagem. Independentemente da temperatura de secagem, todas as formula es utilizadas na peletiza o causaram redu o na velocidade de germina o. Entretanto, quando semeadas em substrato organico e cultivadas em casa de vegeta o, as sementes revestidas com várias formula es apresentaram índices de velocidade de emergência semelhantes aos das sementes n o peletizadas. Neste ambiente, as plantulas oriundas de sementes peletizadas apresentaram crescimento normal, sem diferen as significativas com a testemunha, em rela o à produ o de matéria seca da parte aérea e das raízes, avaliadas aos 20 dias após a semeadura.
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.