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Registro Completo |
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
21/11/2005 |
Data da última atualização: |
18/04/2018 |
Tipo da produção científica: |
Folder/Folheto/Cartilha |
Autoria: |
QUEIRÓZ, M. A. de. |
Afiliação: |
MANOEL ABILIO DE QUEIROZ, CPATSA. |
Título: |
Algumas considerações sobre "Farming Systems". |
Ano de publicação: |
1978 |
Fonte/Imprenta: |
Petrolina: EMBRAPA-CPATSA, 1978. |
Páginas: |
8 p. |
Idioma: |
Português |
Notas: |
Treinamento Extensionista de Milho, Sete Lagoas, MG, julho de 1978. |
Conteúdo: |
Considerando o modelo de pesquisa adotado pela Embrapa, a pesquisa em "Farming Systems" esta concentrada primeiramente nos Centros de Recursos . A pesquisa em "Farming Systems" se aplica fundamentalmente no desenvolvimento de tecnologia para os pequenos produtores rurais. |
Palavras-Chave: |
Pacote tecnológico; Pesquisa multidisciplinar; Sistema de produção em meio real; Small producer. |
Thesagro: |
Agricultura; Exploração Agrícola; Pequeno produtor; Transferencia de tecnologia. |
Thesaurus Nal: |
Farming systems. |
Categoria do assunto: |
B Sociologia Rural |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/175578/1/32452.pdf
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Marc: |
LEADER 01000nam a2200241 a 4500 001 1156456 005 2018-04-18 008 1978 bl uuuu u0uu1 u #d 100 1 $aQUEIRÓZ, M. A. de 245 $aAlgumas considerações sobre "Farming Systems". 260 $aPetrolina: EMBRAPA-CPATSA$c1978 300 $a8 p. 500 $aTreinamento Extensionista de Milho, Sete Lagoas, MG, julho de 1978. 520 $aConsiderando o modelo de pesquisa adotado pela Embrapa, a pesquisa em "Farming Systems" esta concentrada primeiramente nos Centros de Recursos . A pesquisa em "Farming Systems" se aplica fundamentalmente no desenvolvimento de tecnologia para os pequenos produtores rurais. 650 $aFarming systems 650 $aAgricultura 650 $aExploração Agrícola 650 $aPequeno produtor 650 $aTransferencia de tecnologia 653 $aPacote tecnológico 653 $aPesquisa multidisciplinar 653 $aSistema de produção em meio real 653 $aSmall producer
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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Tabuleiros Costeiros. Para informações adicionais entre em contato com cpatc.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia; Embrapa Tabuleiros Costeiros. |
Data corrente: |
07/12/2022 |
Data da última atualização: |
22/12/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
OLIVEIRA, M. B. de; MOLINA, J. C. J.; SILVA, R. S. da; RAMOS, A. F.; PURDY, P. H.; AZEVEDO, H. C. |
Afiliação: |
MATHEUS BATISTA DE OLIVEIRA; JULIO CONSTANTINO JERI MOLINA; REBECA SANTOS DA SILVA; ALEXANDRE FLORIANI RAMOS, Cenargen; PHILLIP HAMILTON PURDY; HYMERSON COSTA AZEVEDO, CPATC. |
Título: |
Effects of cell concentration during cryopreservation on the post-thaw quality of Santa Inês ram sperm. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
CryoLetters, v. 43, n. 6, p. 357?367, 2022. |
DOI: |
https://doi.org/10.54680/fr22610110812 |
Idioma: |
Inglês |
Conteúdo: |
Non-surgical artificial insemination techniques for sheep may benefit from larger numbers of sperm in the insemination dose because the ewe?s cervix is convoluted and often cannot be traversed with an insemination gun resulting in deposition of the sperm at the os cervix. OBJECTIVE: To compare a range of sperm concentrations when cryopreserving semen from Santa Inês rams and determine the effects of this on post-thaw quality. MATERIALS AND METHODS: One ejaculate from each ram (n = 10) was diluted to four sperm concentrations to obtain the following groups: G?400, G?800, G?1200, and G?1600 x 106 sperm/mL. The semen samples were packaged in 0.25 mL straws,cooled to 5 ºC, cryopreserved in liquid nitrogen vapor, thawed in a water bath (40 ºC/20 s), and were analyzed for computerized kinetics, capacitation and acrosome integrity, and plasma membrane integrity of sperm. RESULTS: The G?400 treatment resulted in samples with the highest linearity and progressive motion (P < 0.05) and had significantly greater plasma membrane integrity, and lower capacitation and acrosome reaction rates compared to G-1600 (P < 0.05). Overall, use of the G?400 treatment resulted in better kinetics, less plasma membrane damage and less early capacitation. However, despite reducing the ejaculate yield and increasing the costs of the semen freezing process, the G?800 and G?1200 treatments make a greater absolute number of sperm with good kinetics, plasma membrane integrity and capacitation status available. CONCLUSION: Ram sperm concentration impacts cryopreservation, and higher concentrations may be advantageous if a single artificial insemination protocol is desirable. MenosNon-surgical artificial insemination techniques for sheep may benefit from larger numbers of sperm in the insemination dose because the ewe?s cervix is convoluted and often cannot be traversed with an insemination gun resulting in deposition of the sperm at the os cervix. OBJECTIVE: To compare a range of sperm concentrations when cryopreserving semen from Santa Inês rams and determine the effects of this on post-thaw quality. MATERIALS AND METHODS: One ejaculate from each ram (n = 10) was diluted to four sperm concentrations to obtain the following groups: G?400, G?800, G?1200, and G?1600 x 106 sperm/mL. The semen samples were packaged in 0.25 mL straws,cooled to 5 ºC, cryopreserved in liquid nitrogen vapor, thawed in a water bath (40 ºC/20 s), and were analyzed for computerized kinetics, capacitation and acrosome integrity, and plasma membrane integrity of sperm. RESULTS: The G?400 treatment resulted in samples with the highest linearity and progressive motion (P < 0.05) and had significantly greater plasma membrane integrity, and lower capacitation and acrosome reaction rates compared to G-1600 (P < 0.05). Overall, use of the G?400 treatment resulted in better kinetics, less plasma membrane damage and less early capacitation. However, despite reducing the ejaculate yield and increasing the costs of the semen freezing process, the G?800 and G?1200 treatments make a greater absolute number of sperm with good kinetics, plasma membrane integrity and capacitation status availab... Mostrar Tudo |
Palavras-Chave: |
Ovino Santa Iês. |
Thesagro: |
Carneiro; Esperma; Inseminação; Inseminação Artificial; Ovelha; Ovino. |
Thesaurus NAL: |
Rams; Sperm concentration. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02544naa a2200301 a 4500 001 2150268 005 2022-12-22 008 2022 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.54680/fr22610110812$2DOI 100 1 $aOLIVEIRA, M. B. de 245 $aEffects of cell concentration during cryopreservation on the post-thaw quality of Santa Inês ram sperm.$h[electronic resource] 260 $c2022 520 $aNon-surgical artificial insemination techniques for sheep may benefit from larger numbers of sperm in the insemination dose because the ewe?s cervix is convoluted and often cannot be traversed with an insemination gun resulting in deposition of the sperm at the os cervix. OBJECTIVE: To compare a range of sperm concentrations when cryopreserving semen from Santa Inês rams and determine the effects of this on post-thaw quality. MATERIALS AND METHODS: One ejaculate from each ram (n = 10) was diluted to four sperm concentrations to obtain the following groups: G?400, G?800, G?1200, and G?1600 x 106 sperm/mL. The semen samples were packaged in 0.25 mL straws,cooled to 5 ºC, cryopreserved in liquid nitrogen vapor, thawed in a water bath (40 ºC/20 s), and were analyzed for computerized kinetics, capacitation and acrosome integrity, and plasma membrane integrity of sperm. RESULTS: The G?400 treatment resulted in samples with the highest linearity and progressive motion (P < 0.05) and had significantly greater plasma membrane integrity, and lower capacitation and acrosome reaction rates compared to G-1600 (P < 0.05). Overall, use of the G?400 treatment resulted in better kinetics, less plasma membrane damage and less early capacitation. However, despite reducing the ejaculate yield and increasing the costs of the semen freezing process, the G?800 and G?1200 treatments make a greater absolute number of sperm with good kinetics, plasma membrane integrity and capacitation status available. CONCLUSION: Ram sperm concentration impacts cryopreservation, and higher concentrations may be advantageous if a single artificial insemination protocol is desirable. 650 $aRams 650 $aSperm concentration 650 $aCarneiro 650 $aEsperma 650 $aInseminação 650 $aInseminação Artificial 650 $aOvelha 650 $aOvino 653 $aOvino Santa Iês 700 1 $aMOLINA, J. C. J. 700 1 $aSILVA, R. S. da 700 1 $aRAMOS, A. F. 700 1 $aPURDY, P. H. 700 1 $aAZEVEDO, H. C. 773 $tCryoLetters$gv. 43, n. 6, p. 357?367, 2022.
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