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| Registros recuperados: 31 | |
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| MORAES, S da S.; NICODEMO, M. L. F.; VAZ, E. C.; PIRES, P. P.; CATANANTE, M. C.; THIAGO, L. R. L. de S.; VIEIRA, J. M.; FONSECA, E. M.. |
| De um modo geral, as concentracoes de zinco nas braquiarias sao bastante baixas, nao atendendo as necessidades de bovinos em pastejo na maioria das categorias. As vacas de cria formam a categoria do rebanho mais predisposta a esse tipo de deficiencia, por seus elevados requisitos nutricionais, ao tempo que permanecem no rebanho, e por serem destinadas a elas geralmente as piores areas de pastagens. Resultados de analises de forrageiras nativas e cultivadas das areas de cerrado, realizadas no laboratorio da Embrapa Gado de Corte, demonstraram que 90% das amostras apresentaram teores de Zn abaixo do nível considerado minimo (20 ppm) para um bom desempenho animal. O principal objetivo e evidenciar a relacao entre a suplementacao de zinco das vacas e a... |
| Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Bovino de corte; Mineral deficiencies.; Bezerro; Deficiência Mineral; Sanidade Animal; Vaca; Zinco.; Animal health; Beef cattle; Cows; Calves; Zinc.. |
| Ano: 2001 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/325280 |
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| OHTANI, Masayuki; OKI, Naoko; TANIMURA, Miyune; KOBAYASHI, Shu-ichi; ACOSTA, Tomas J.; HAYASHI, Kanako; MIYAMOTO, Akio; 宮本, 明夫. |
| It is well known that an injection of prostaglandin F2α (PGF2α) or its analogue during the mid luteal phase of the estrous cycle induces a rapid decrease in plasma progesterone (P4) concentration, followed by luteolysis in the cow. There is evidence that a potent vasoactive peptide, endothelin-1 (ET-1), is produced in the bovine corpus luteum (CL), and that it is directly involved in luteolysis. We previously found that ET-1 concentrations in the peripheral plasma increase during the period of luteolysis and ovulation in cows. However, it is not clear whether the elevation of peripheral plasma ET-1 concentration observed during luteolysis and ovulation originates exclusively from the ovary and/or CL. Such a profile of plasma ET-1 concentration may be... |
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Palavras-chave: Endothelin; Progesterone; Plasma; Calves; Cows. |
| Ano: 2001 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2973 |
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| Arzate-Vázquez,Gerardo L; Castrejón-Pineda,Francisco A; Rosiles-Martínez,René; Carrillo-Pita,Silvino; Angeles-Campos,Sergio; Vargas-Bello-Pérez,Einar. |
| G.L. Arzate-Vázquez, F.A. Castrejón-Pineda, R. Rosiles-Martínez, S. Carrillo-Pita, S. Angeles-Campos, and E. Vargas-Bello-Pérez. 2016. Effect of genus and growth stage on the chemical and mineral composition of tropical grasses used to feed dairy cows. Cien. Inv. Agr. 43(3): 476-485. In tropical production systems, dairy cows are rarely supplemented with minerals, which often lead to mineral imbalances. Grasses grown together in the same soil type and sampled at the same growth stage can vary widely in chemical and mineral composition; therefore, the objective of this study was to characterize the chemical and mineral composition of Urochloa spp., Megathyrsus spp., and Andropogon spp. at three different stages of growth in the same soil type. The content... |
| Tipo: Journal article |
Palavras-chave: Cows; Forage; Nutritive value; Ruminants; Trace minerals. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000300013 |
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| VALLE, E. R. do; ANDREOTTI, R.; THIAGO, L. R. L. de S.. |
| Na pecuária de corte, a exploração comercial do sistema de cria se constitui na fase do sistema produtivo, que envolve a criação e o manejo não só das matrizes bovinas e seus respectivos bezerros ate a desmama, mas também das novilhas de reposição e dos touros. Esse sistema tem por objetivo a produção de bezerros desmamados que representa a maior fonte de receita do criador. A venda de vacas descartadas e outros animais, apesar de contribuírem para a produção total, e uma fonte de receita marginal. Portanto, a viabilidade do sistema vai depender da eficácia e eficiência com que são utilizados os meios disponíveis para a otimização da produtividade. O escopo deste trabalho foi o de apresentar e discutir as principais praticas de manejo reprodutivo, que... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Bovino de corte; Estacao de monta; Novilha; Sanidade; Eficiência; Calf; Health; Management; Production.; Acasalamento; Bezerro; Desmama; Manejo; Reprodução; Produção; Vaca.; Touro; Beef cattle; Bulls; Heifers; Copulation; Cows; Reproduction; Reproductive performance; Weaning.. |
| Ano: 1998 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/321581 |
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| LANGONI,Helio; ICHIHARA,Sílvio Massaru; SILVA,Aristeu Vieira da; PARDO,Renata Bonini; TONIN,Flávia Bechelli; MENDONÇA,Lia Jeanne Pereira; MACHADO,José Aparecido Dorta. |
| Brucellosis is a chronic zoonosis that plays an important role in Public Health. Considering the lack of data in Brazil regarding its presence in raw milk and non-pasteurized dairy products, we determined the presence of brucellae in milk from brucellosis positive animals. The slide agglutination test (SAT), tube agglutination test (TAT) and TAT treated with 2-mercaptoethanol were used to identify positive animals in studied herds. For 3 days, 300 ml milk samples/cow (75 ml/teat) were collected from all productive quarters of the positive animals. These were mixed and centrifuged. Part of the pellet and of the supernatant were inoculated in Farrel and Brodie-Sinton (BS) media supplemented with antimicrobial agents. The inoculated plates and tubes were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Milk; Brucella abortus; Cows; Brucellosis. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962000000600004 |
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| KAWATA, Yukichika; 河田, 幸視. |
| This paper reviewed existing lactation models which are mainly applied to dairy cows. There are many related papers; in 50 papers, 90 lactation curves are presented. The most frequently used model is Wood’s (1967), which was quoted in 75 papers. In general, the earlier the year of the model presented in the paper, the higher its frequency of quotation. Wood’s (1967) model was followed by other models from Brody et al. (1923), Sikka (1950), Nelder (1966), Dave (1971), Cobby et al. (1978), Ali et al. (1987), Wilmink (1987), and Grossman et al. (1988); these models were quoted 9, 8, 17, 11, 9, 12, 18, and 11 times, respectively. The classic models, which have been mainly described as the function of time, have less room for improvement and have become... |
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Palavras-chave: Lactation curve; Classic model; Test day model; Review; Cows; 泌乳曲線; Test day model; レビュー; 乳牛. |
| Ano: 2011 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3113 |
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| Silva,Francielle Gibson da; Freitas,Julio Cesar de; Anzai,Eleine Kuroki; Hashimoto,Vanessa Yumi; Giraldi,Nilson; Delbem,Ádina Cléia B.; Bracarense,Ana Paula F.R.L.; Reis,Antônio Carlos F. dos; Vasconcellos,Silvio Arruda. |
| The objective of this trial was to detect leptospires in fragments of kidney, liver and uterus of 96 cows with unknown sanitary status, randomly chosen at slaughter in Paraná, Brazil. All 96 urine samples were submitted to direct examination using dark field microscopy. Positive samples in the direct examination and all kidney, liver and uterus fragments were cultured in EMJH modified medium and Tween 80/40/LH. Sections cut of kidney, liver and uterus were stained by Hematoxylin-Eosin (HE) and indirect immunoperoxidase with hyperimmune serum against serovar Hardjo (Hardjoprajitno) and strain Londrina 14 (LO14), from serovar Canicola, which was isolated in the northern region of Paraná state, Brazil, used as primary antibodies. Direct examination detected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leptospire; Indirect immunoperoxidase; Immunohistochemistry; Cows; Culture. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000100008 |
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| Pavel Kic. |
| Milking is a key operation on dairy farms. The capacity and function of milking parlor influences production conditions (time of operations, needs of labor, total costs), so actually it affects the efficiency of the whole dairy farm. This paper presents a structure and principal parts of mathematical model which was created with the aim to enable to farmers and designers to choose suitable type of milking parlor for specific farm conditions. Three principal questions important for optimization of milking parlor are: technical parameters, indicators of labor productivity and economic criteria. The model structure was created with the aim to find the answer to all of them. The model includes in calculation main parameters of typical arrangements of milking... |
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Palavras-chave: Farm; Cows; Equipment; Labor productivity; Specific costs; Czech Republic. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3138 |
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| Kic, Pavel. |
| Milking is a key operation on dairy farms. The capacity and function of milking parlor influences production conditions (time of operations, needs of labor, total costs), so actually it affects the efficiency of the whole dairy farm. This paper presents a structure and principal parts of mathematical model which was created with the aim to enable to farmers and designers to choose suitable type of milking parlor for specific farm conditions. Three principal questions important for optimization of milking parlor are: technical parameters, indicators of labor productivity and economic criteria. The model structure was created with the aim to find the answer to all of them. The model includes in calculation main parameters of typical arrangements of milking... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Farm; Cows; Equipment; Labor productivity; Specific costs; Czech Republic. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3138 |
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| Rocha,Bruno Ribeiro; Narduche,Lorena; Oliveira,Clara Slade; Martins,Gabriel; Lilenbaum,Walter. |
| ABSTRACT: For a long time, it has been stated that urine leptospiral shedding is intermittent, which was observed primarily by culturing. However, culturing presents serious limitations, mainly low sensitivity, and failure on detection of leptospires cannot be neglected. PCR presents several advantages, mainly higher sensitivity. The present study aimed to analyze the occurrence of intermittency on leptospiral shedding by PCR in naturally and experimentally infected animals. In this study two experiments were conducted, the first with 60 cows naturally infected from an endemic herd. The second one was conducted in three sheep experimentally infected, each one with a different strain of Leptospira (strains Copenhageni L1-130, Canicola LO-4 and Pomona... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cows; Intermittent; PCR; Sheep; Strain. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000800453 |
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| Macêdo,A.A.M.; Oliveira,J.M.B.; Silva,B.P.; Borges,J.M.; Soares,L.B.F.; Silva,G.M.; Santos,S.B.; Mota,R.A.; Pinheiro-Júnior,J.W.. |
| ABSTRACT The objective of this study was to conduct an investigation of Mycoplasma bovigenitalium and Ureaplasma diversum infections in cattle in the microregion of the Ipanema Valley, state of Pernambuco, Brazil. Vaginal swabs were collected from 355 breeding cows in reproductive age and were analyzed by multiplex PCR (mPCR) and culture. An epidemiological investigation of risk factors was performed for Mollicutes. mPCR analysis showed that, 9.29% (33/355) of the cows were positive for M. bovigenitalium and 21.69% (77/355) for U. diversum; coinfection was observed in 2.81% (10/355) of the cows. The microbiological isolation showed, 81.81% (27/33) of Mycoplasma spp. and 24.67% (19/77) of Ureaplasma spp.. The risk factors related to Mollicutes infection... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MPCR; Mollicutes; Cows; Risk factors; Ipanema valley. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000601798 |
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| Registros recuperados: 31 | |
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