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Search Results: 1 - 10 of 664226 matches for " Costa O.A.D. "
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Fatores de risco associados ao vício de suc??o em leit?es na fase de creche
Amaral, A.L.;Morés, N.;Barioni Júnior, W.;Costa, O.A.D.;Guzzo, R.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2003, DOI: 10.1590/S0102-09352003000500003
Abstract: risk factors associated with the suckling vice in post-weaning piglets were studied in an epidemiological survey in 65 swine herds in south brazil. this follow-up study was performed in one group of piglets from each herd from birth to 21 days post weaning. every group was composed by piglets from at least six litters. data related to housing, feeding, breeding practices, internal environment in the weaning facilities and individual piglets performance were collected for descriptive and multiple correspondence analyses. suckling vice was identified in 23 (35.4%) herds and groups presenting suckling vice had lower growth rates (p<0.005). main risk factors associated with suckling vice were weaning weight lower than 6.3kg, unavailability of drinkers for piglets in the farrowing house, occurrence of post-weaning diarrhea, post-weaning drinkers of a different model than the ones available during the suckling term, inadequate axis direction of the building, presence of signs of mange, no all-in-all-out procedure in the post-weaning facilities, and the use of feed restriction immediately after weaning. the authors suggest that a correction of these factors would reduce the occurrence of suckling vice in post-weaning piglets and improve their grow rates after weaning.
Fatores de risco associados ao vício de suc o em leit es na fase de creche
Amaral A.L.,Morés N.,Barioni Júnior W.,Costa O.A.D.
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2003,
Abstract: Foi realizado um estudo epidemiológico em 65 granjas de suínos situadas na regi o Sul do Brasil para identificar os fatores que favorecem a ocorrência do vício de suc o entre leit es desmamados. Em cada granja acompanhou-se um lote de leit es do nascimento até 21 dias após o desmame, provenientes de no mínimo seis leitegadas, para obten o de informa es relacionadas às instala es, à nutri o, às práticas de manejo, ao ambiente interno e ao desempenho dos leit es. Os dados foram submetidos à análises descritivas e de correspondência múltipla. A manifesta o do vício ocorreu em 23 (35,4%) granjas. Nos lotes que apresentaram o vício de suc o, os leit es obtiveram média de ganho diário de peso (P<0,005) inferior aos que n o apresentaram o vício de suc o. Os principais fatores de risco identificados foram: peso médio ao desmame menor que 6,3kg, ausência de bebedouro específico para os leit es na maternidade, ocorrência de diarréia na primeira semana após o desmame, tipo de bebedouro usado na creche diferente daquele usado na maternidade, orienta o do eixo do prédio inadequado, presen a de sinais de sarna no lote, ausência de vazio sanitário na creche e uso da restri o alimentar logo após o desmame. Sugere-se que a corre o dos fatores de risco previna a manifesta o do vício de suc o e melhore a média de ganho diário de peso dos leit es após o desmame.
Efeito das condi??es pré-abate sobre a qualidade da carne de suínos pesados
Dalla Costa,O.A.; Ludke,J.V.; Costa,M.J.R.P.; Faucitano,L.; Peloso,J.V.; Dalla Roza,D.;
Archivos de Zootecnia , 2010, DOI: 10.4321/S0004-05922010000300007
Abstract: the objective of this study was to evaluate pig fasting time at the farm (ft= 9, 12, 15 or 18 hours) and pig position into the pig lorry compartment on pork quality through liquid drip loss (dll), ph1 evaluated at 45 minutes post slaughter and phu evaluated 24 hours post slaughter. one hundred ninety two females, weighing 133±11 kg, from two farms were used. pig locations were evaluated on truck compartment considering front, middle and rear (tcl) position and top or botton decks (lud). the following effects were considered in the statistical model: block (bl= farm), ft, tcl, lud and the interaction between bl and ft. the ft affected significantly the ph1 of longissimus dorsi (ld) muscle, and phu of semispinalis capitis (sc), longissimus dorsi (ld) and semimembranosus (sm) muscles. fasting time at farm equal or shorter than 12 hours resulted in carcasses with lower phu values at ld and sm muscles and fasting time above 15 hours resulted in higher phu on sc. there were no observed effect (p>0.05) of the evaluated sources of variation on dll. tcl affected ph1 of sc, ld and sm muscles, and phu of ld and sm muscles. pigs located in middle or rear position in the lorry had no difference in ph1 of the evaluated muscles. but pigs located in the middle position of the lorry had greater values of phu on ld and sm. it is stated that pigs fasting time at farm need to be close to 15 hours in aim of obtain higher frequency of phu values in the normal range (5.55
Trichomoniasis in special treatment clinic patients in Ibadan, Nigeria
O.A Akinloye, D.O Ogbolu, F.O Kolade, O.A Alli
African Journal of Biomedical Research , 2007,
Abstract: Among 504 out-patients (males and females) suffering from various forms of sexually transmitted diseases at special treatment clinic in University College Hospital, Ibadan, 48 (9.5%) of them were found to have Trichomonas viginalis. Trichomoniasis was found to be more prevalent in women (12.5% of 280), thirteen (5.8%) out of the 224 males had trichomoniasis with a high prevalence in the age bracket of 11 – 30 years in both sexes. Large percentage of single women and men investigated (53% and 26% respectively – 79% in all based on isolates) had trichomoniasis. It was discovered that 68.4% of patients infected with trichomoniasis had discharge (vaginal and urethral), 42.1% had pain on passing urine while 10.5% had irritation on passing urine, and also 10.5% had increase frequency. Twenty-two (42%) of 48 patients with T. vaginalis were diagnosed by microscopy of direct wet mount preparation, all the 48 (100%) positive cases were diagnosed by culture. The two media (Trichomonas medium 2 (Oxoid) and NBGS supported the growth of T. vaginalis and they failed to show superiority over each other. (Afr. J. Biomed. Res. 10: 19 – 24, January 2007)
Fatores de risco associados aos problemas dos leit?es na fase de creche em rebanhos da regi?o Sul do Brasil
Morés, N.;Sobestansky, J.;Barioni Junior, W.;Madec, F.;Dalla Costa, O.A.;Paiva, D.P.;Lima, G.M.M.;Amaral, A.L.;Perdomo, C.C.;Coimbra, J.B.S.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2000, DOI: 10.1590/S0102-09352000000300002
Abstract: epidemiological essay was carried out in 65 herds of southern brazil, with the objective to identify risk factors that better explain the occurrence of problems with the pigs during post-weaning phase. in each herd, a batch of pigs was followed during the first three post-weaning weeks, when variables like building conditions, nutrition, management, environment and health were taken into account. descriptive and multivariate methods had been used to analyze the data. target variable used to describe pig problems during post-weaning phase had been: weight daily gain, weight coefficient of variation at 21 days post-weaning, occurrence of diarrhea in the batch, mortality rate and the medicine use dressings against the diarrhea. with the help of these variables a synthetic variable was created for discriminating the farms in three categories: good, intermediate and bad. among explicative variables, 10 risk factors had been selected as more important, making it possible to identify farms with high trend to present problems during post-weaning phase. one concludes that in many herds of the south region of brazil some risk factors exist that favor the occurrence of problems with the pigs during the weaning phase, some of as consequence of others from maternity phase.
Estimativa dos índices de pneumonia, pela tosse, e de rinite atrófica, por espirros, em suínos
Morés, N.;Barioni Junior, W.;Sobestansky, J.;Dalla Costa, O.A.;Piffer, I.A.;Paiva, D.P.;Guzzo, R.;Coimbra, J.B.S.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2001, DOI: 10.1590/S0102-09352001000300003
Abstract: a study in 64 swine herds was carried out in order to estimate the pneumonia index (pi) and the atrophic rhinitis index (ari) through the quantification of coughing and sneezing in growing-finishing pigs. in each herd, 60 pigs were evaluated from lodging in the growing-finishing phase up to slaughter. the amount of coughing and sneezing episodes was counted in four opportunities (30, 50 and 80 days after lodging, and three days before slaughter). in each opportunity three counts of two minutes each were made and the percentage of coughing and sneezing was calculated by the average of the three counts in relation to the batch size. at slaughter, for all pig-batches the frequency and severity of lung consolidation and atrophic rinithis were determined and scored. all data were submitted to the pearson correlation and to the simple regression analyses of the pie in relationship to the percentage of coughing and arie in relationship to the percentage of sneezing. the resulting equation were: pi estimated = 0.35 + (0.11 ′ % of coughing) with r2 = 0.45, and ari estimated = 0.36 + (0.065 ′ % of sneezing) with r2 = 0.36. it is concluded that the quantification of coughing and sneezing can be used to estimate ari and pi indexes in growing-finishing pigs.
Performance Characteristics and Carcass Quality of Broiler Chicks Under High Stocking Density Fed Vitamin E Supplemented Diet
O.A. Adebiyi,O.A. Adu,M.D. Olumide
Agricultural Journal , 2013, DOI: 10.3923/aj.2011.264.268
Abstract: About 270 days old Arbor acre strain of broiler chicks were used for this research. The birds were randomly divided into five treatment groups of 10 birds m-2/replicate (0.1 m2 per bird) in treatment 1 (positive control) while those in treatments 2 (negative control) and 3-5 had 20 birds/m2/replicate (0.05 m2 per bird). Birds fed dietary treatment 1 and 2 had no supplementation with vitamin E whereas birds on dietary treatments 3-5 had 50, 100 and 150 mg kg-1 vitamin E supplementation, respectively. All treatments were replicated three times. At the end of the 4 weeks of experiment, carcass characteristics (Cold Shortening (CS), Thermal Shortening (TS), Cooking Loss (CL), Shear Force (SF) and Water Holding Capacity (WHC)) of the birds were determined. There were no significant changes in the weight gain and final weight of the birds fed the different dietary treatments. However, the Feed Conversion Ratio (FCR) revealed that birds on dietary treatment 2 had the highest significant value of 3.29 compared to those on vitamin E supplemented diets. No significant different was observed in the WCH of both raw (58.43-59.43%) and the cooked meat (59.02-59.51%) for all the treatments. Birds fed dietary treatment 2 (negative control) had the highest significant (p<0.05) CS value of 3.50% compared to its counterparts on vitamin E supplemented diets with values ranging from 2.45-2.55%. No significant difference was observed in the SF of the birds in all the treatment with mean value ranging from 3.35-3.60%. In conclusion, broiler chicks could be stocked up to 20 birds m-2 only if the diet is supplemented with 100 mg kg-1 vitamin E.
Carbon based nanostructures: diamond clusters structured with nanotubes
Shenderova, O.A.;Areshkin, D.;Brenner, D.W.;
Materials Research , 2003, DOI: 10.1590/S1516-14392003000100004
Abstract: feasibility of designing composites from carbon nanotubes and nanodiamond clusters is discussed based on atomistic simulations. depending on nanotube size and morphology, some types of open nanotubes can be chemically connected with different facets of diamond clusters. the geometrical relation between different types of nanotubes and different diamond facets for construction of mechanically stable composites with all bonds saturated is summarized. potential applications of the suggested nanostructures are briefly discussed based on the calculations of their electronic properties using environment dependent self-consistent tight-binding approach.
Carbon based nanostructures: diamond clusters structured with nanotubes
Shenderova O.A.,Areshkin D.,Brenner D.W.
Materials Research , 2003,
Abstract: Feasibility of designing composites from carbon nanotubes and nanodiamond clusters is discussed based on atomistic simulations. Depending on nanotube size and morphology, some types of open nanotubes can be chemically connected with different facets of diamond clusters. The geometrical relation between different types of nanotubes and different diamond facets for construction of mechanically stable composites with all bonds saturated is summarized. Potential applications of the suggested nanostructures are briefly discussed based on the calculations of their electronic properties using environment dependent self-consistent tight-binding approach.
Seroprevalence of Infectious Bursal Disease in Flocks of Indigenous Nigerian Ducks (Anas platyrhynchos)
D.O. Oluwayelu,B.O. Emikpe,O.A. Oladele,O.G. Ohore,O.A. Fagbohun
Journal of Animal and Veterinary Advances , 2012,
Abstract: A serological survey was conducted to determine the prevalence of Infectious Bursal Disease (IBD), using the quantitative Agar Gel Precipitin Test (AGPT), in flocks of apparently healthy, unvaccinated adult indigenous Nigerian ducks in Oyo and Osun states of Nigeria. Of the 126 sera tested, 24 (19.1%) were positive for IBDV precipitins. None of the 15 samples from Farm A was positive but 9 (30.0%) from Farm B and 15 (18.5%) from backyard flocks were positive for IBDV antibodies. 15 of the positive samples had a titre of 1:16, 6 had titre of 1:32 while 3 had titre of 1:64. The Geometric Mean Titre (GMT) for the Farm B and indigenous duck samples were 21 and 23, respectively. This range of antibody titres detected in unvaccinated ducks is an indication of previous exposure to IBDV and is sufficiently high to suggest that indigenous Nigerian ducks have an important role in the natural history of IBD and could serve as carriers of the virus, thereby complicating IBD control measures.
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