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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Arroz e Feijão; Embrapa Florestas; Embrapa Gado de Leite; Embrapa Hortaliças; Embrapa Mandioca e Fruticultura; Embrapa Meio Ambiente; Embrapa Meio Norte / UEP-Parnaíba; Embrapa Roraima; Embrapa Semiárido; Embrapa Soja; Embrapa Tabuleiros Costeiros; Embrapa Trigo; Embrapa Unidades Centrais. MenosEmbrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Arroz e Feijão; Embrapa Florestas; Embrapa Gado de Leite; Embrapa Hortaliças; Embrapa Mandioca e Fruticultura; Embrapa Meio Ambiente; Embrapa Meio Norte / UEP-Parnaíba; Embrapa Roraima... Mostrar Todas |
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Data corrente: |
20/07/1992 |
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Data da última atualização: |
25/06/2019 |
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Autoria: |
MACÊDO, M. M. C.; SILVA, J. de S. |
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Afiliação: |
EMBRAPA-PRESIDENCIA; JOSÉ DE SOUZA SILVA, Embrapa-SEA. |
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Título: |
Assessoria parlamentar e sustentabilidade institucional: elementos para uma estratégia de ação na EMBRAPA. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Brasília, DF: EMBRAPA-GPR, 1992. |
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Páginas: |
19 p. |
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Idioma: |
Português |
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Conteúdo: |
Aborda elementos para uma estratégia de ação na EMBRAPA com relação à assessoria parlamentar e sustentabilidade institucional. Mostra relação tradicional do setor público-segmento político e nova base para o setor público e o segmento político. |
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Palavras-Chave: |
Acoes; Adviser; Agropecuária; Assessoria; Assessoria parlamentar; Brasil; Competência; Credibilidade; Desenvolvimento; EMBRAPA; Enterprises; estrategia; Estrategia de acao; Estrategia política; Estrategias de acao; Institucional; Instituicao; Institution; Organização; Organização sustentável; Organization; Parlamentary; Parliamentary assessor; Relacao; Relacionamento; Segmento politico; Strategic planning; Sustainable; Sustentabilidade; Sustentabilidade institucional; Sustentabilidade politica; sutentabilidade institucional. |
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Thesagro: |
Instituição de Pesquisa; Instituição Pública; Pesquisa; Planejamento; Planejamento Estratégico; Política; Política Agrícola; Setor Público. |
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Thesaurus Nal: |
agriculture; Brazil; marketing; planning; Politics; Research; research institutions. |
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Categoria do assunto: |
--
B Sociologia Rural |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/186486/1/Assessoria-parlamentar.pdf
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Marc: |
LEADER 02137nam a2200697 a 4500
001 1086263
005 2019-06-25
008 1992 bl uuuu u0uu1 u #d
100 1 $aMACÊDO, M. M. C.
245 $aAssessoria parlamentar e sustentabilidade institucional$belementos para uma estratégia de ação na EMBRAPA.
260 $aBrasília, DF: EMBRAPA-GPR$c1992
300 $a19 p.
520 $aAborda elementos para uma estratégia de ação na EMBRAPA com relação à assessoria parlamentar e sustentabilidade institucional. Mostra relação tradicional do setor público-segmento político e nova base para o setor público e o segmento político.
650 $aagriculture
650 $aBrazil
650 $amarketing
650 $aplanning
650 $aPolitics
650 $aResearch
650 $aresearch institutions
650 $aInstituição de Pesquisa
650 $aInstituição Pública
650 $aPesquisa
650 $aPlanejamento
650 $aPlanejamento Estratégico
650 $aPolítica
650 $aPolítica Agrícola
650 $aSetor Público
653 $aAcoes
653 $aAdviser
653 $aAgropecuária
653 $aAssessoria
653 $aAssessoria parlamentar
653 $aBrasil
653 $aCompetência
653 $aCredibilidade
653 $aDesenvolvimento
653 $aEMBRAPA
653 $aEnterprises
653 $aestrategia
653 $aEstrategia de acao
653 $aEstrategia política
653 $aEstrategias de acao
653 $aInstitucional
653 $aInstituicao
653 $aInstitution
653 $aOrganização
653 $aOrganização sustentável
653 $aOrganization
653 $aParlamentary
653 $aParliamentary assessor
653 $aRelacao
653 $aRelacionamento
653 $aSegmento politico
653 $aStrategic planning
653 $aSustainable
653 $aSustentabilidade
653 $aSustentabilidade institucional
653 $aSustentabilidade politica
653 $asutentabilidade institucional
700 1 $aSILVA, J. de S.
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
29/05/2017 |
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Data da última atualização: |
29/05/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
OLIVARES, C. C. S.; SOUZA-FABJAN, J. M. G. de; FONSECA, J. F. da; BALARO, M. F. A.; FREITAS, V. J. de F.; OLIVEIRA, R. V. de; BRANDÃO, F. Z. |
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Afiliação: |
Carolina Cerqueira Sarmento Olivares; Joanna Maria Gonçalves de Souza-Fabjan; JEFERSON FERREIRA DA FONSECA, CNPC; Mario Felipe Alvarez Balaro; Vicente José de Figueirêdo Freitas; Rodrigo Vasconcelos de Oliveira; Felipe Zandonadi Brandão. |
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Título: |
Comparison of different sperm selection techniques in ram frozen-thawed sperm. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Acta Scientiae Veterinariae, v. 45, p. 1431, 2017. |
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Idioma: |
Inglês |
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Conteúdo: |
Resumo: Background: The success of fertilization is directly associated with semen quality and the sperm preparation. Considering the common use of cryopreserved spermatozoa, there is a need to develop strategies for sperm preparation in order to achieve a sperm sample of high quality through a rigorous selection of sperm. Thus, sperm cells are being more extensively investigate. This study aimed evaluating the influence of different sperm selection techniques on ram sperm parameters in semen preparation. Materials, Methods & Results: Frozen-thawed commercial semen from 10 Santa Inês rams was subjected to either: swim-up, Percoll, mini-Percoll, sperm washing by centrifugation or a control group. After each technique, samples were incubated at 37°C for 1 h, 2 h and 3 h. At post-selection moment (0 h) and at each interval, sperm recovery rate, motility, capacitation and plasma membrane (PM) integrity were analyzed. The lowest (P < 0.05) recovery rate was recorded after swim-up (1.0 ± 0.3%), whilst the others were similar (P > 0.05). Most part of motility parameters were not affected (P > 0.05) by the technique at 0 h; just swim-up obtained higher (P < 0.05) values for VSL (41.8 ± 11.1) and VAP (46.9 ± 11.2). Overall, swim-up presented higher (P < 0.05) values for most of motility parameters over time of incubation. The control group led to more (P < 0.05) capacitated cells (46.8 ± 2.3%), whilst Percoll, mini-Percoll and swim-up were similar (~33%; P > 0.05), regardless of interval incubation. However, the latter three techniques presented more (P < 0.05) reacted cells. Swim-up recovered a higher (P < 0.05) number of intact cells (32.1 ± 6.4%), and Percoll, mini-Percoll and control group were similar (P > 0.05). Discussion: The present study evaluated the sperm cell and its preparation for receiving the oocyte under optimal conditions. evaluate the sperm cell and its preparation for receiving the oocyte under optimal conditions. Although the swim-up technique promoted higher rates for some of the sperm parameters evaluated, Percoll protocols are the most widely used procedures for selection during the sperm preparation in many species, possibly because of its greater speed, practical method and convenience compared to the swim-up technique. Percoll and mini-Percoll recovered approximately 10 times more cells than swim-up, which is an important feature to be considered during sperm preparation for in vitro fertilization (IVF), being possible to use only one semen straw. The high capacitated and acrosome reaction rates observed after the treatments in the current study, are probably reinforced by changes in sperm cells caused by the cryopreservation process. In order to strength the evidence that frozen-thawed sperm, even after selection, is sensible and reactive to capacitation-like events, we demonstrated the capacitated and acrosome-reacted cell values immediately after the selection treatments behaved differently than when authors used ram fresh sperm. Possibly, this capacitation-like changes observed in frozen-thawed sperm occurs regardless of the selection treatment used. Analyzing the motility parameters immediately after the selection, all treatments maintained or increased the rates compared to the control group. The swim-up, mini-Percoll and Percoll did not differ in any parameters. Given that Percoll and mini-Percoll did not show differences in relation to swim-up for motility parameters, such techniques can be used to replace the latter, obtaining similar sperm samples with good quality. However, swim-up technique involves a procedure that recovers a clean fraction without debris and other types of cells, with high rate of mobile sperm with excellent quality, reason why it can justify the higher recovery of intact spermatozoa after the technique. MenosResumo: Background: The success of fertilization is directly associated with semen quality and the sperm preparation. Considering the common use of cryopreserved spermatozoa, there is a need to develop strategies for sperm preparation in order to achieve a sperm sample of high quality through a rigorous selection of sperm. Thus, sperm cells are being more extensively investigate. This study aimed evaluating the influence of different sperm selection techniques on ram sperm parameters in semen preparation. Materials, Methods & Results: Frozen-thawed commercial semen from 10 Santa Inês rams was subjected to either: swim-up, Percoll, mini-Percoll, sperm washing by centrifugation or a control group. After each technique, samples were incubated at 37°C for 1 h, 2 h and 3 h. At post-selection moment (0 h) and at each interval, sperm recovery rate, motility, capacitation and plasma membrane (PM) integrity were analyzed. The lowest (P < 0.05) recovery rate was recorded after swim-up (1.0 ± 0.3%), whilst the others were similar (P > 0.05). Most part of motility parameters were not affected (P > 0.05) by the technique at 0 h; just swim-up obtained higher (P < 0.05) values for VSL (41.8 ± 11.1) and VAP (46.9 ± 11.2). Overall, swim-up presented higher (P < 0.05) values for most of motility parameters over time of incubation. The control group led to more (P < 0.05) capacitated cells (46.8 ± 2.3%), whilst Percoll, mini-Percoll and swim-up were similar (~33%; P > 0.05), regardless of inte... Mostrar Tudo |
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Palavras-Chave: |
CASA; CTC; Plasma membrane integrity; Protocolo; Reproductive techniques; Sperm preparation. |
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Thesagro: |
Espermatozóide; Ovino; Reprodução animal; Sêmen. |
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Thesaurus NAL: |
Reproduction; Sheep; sperm capacitation; Spermatozoa; Treaties. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/160322/1/CNPC-2017-Comparison.pdf
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Marc: |
LEADER 04855naa a2200373 a 4500
001 2070178
005 2017-05-29
008 2017 bl uuuu u00u1 u #d
100 1 $aOLIVARES, C. C. S.
245 $aComparison of different sperm selection techniques in ram frozen-thawed sperm.
260 $c2017
520 $aResumo: Background: The success of fertilization is directly associated with semen quality and the sperm preparation. Considering the common use of cryopreserved spermatozoa, there is a need to develop strategies for sperm preparation in order to achieve a sperm sample of high quality through a rigorous selection of sperm. Thus, sperm cells are being more extensively investigate. This study aimed evaluating the influence of different sperm selection techniques on ram sperm parameters in semen preparation. Materials, Methods & Results: Frozen-thawed commercial semen from 10 Santa Inês rams was subjected to either: swim-up, Percoll, mini-Percoll, sperm washing by centrifugation or a control group. After each technique, samples were incubated at 37°C for 1 h, 2 h and 3 h. At post-selection moment (0 h) and at each interval, sperm recovery rate, motility, capacitation and plasma membrane (PM) integrity were analyzed. The lowest (P < 0.05) recovery rate was recorded after swim-up (1.0 ± 0.3%), whilst the others were similar (P > 0.05). Most part of motility parameters were not affected (P > 0.05) by the technique at 0 h; just swim-up obtained higher (P < 0.05) values for VSL (41.8 ± 11.1) and VAP (46.9 ± 11.2). Overall, swim-up presented higher (P < 0.05) values for most of motility parameters over time of incubation. The control group led to more (P < 0.05) capacitated cells (46.8 ± 2.3%), whilst Percoll, mini-Percoll and swim-up were similar (~33%; P > 0.05), regardless of interval incubation. However, the latter three techniques presented more (P < 0.05) reacted cells. Swim-up recovered a higher (P < 0.05) number of intact cells (32.1 ± 6.4%), and Percoll, mini-Percoll and control group were similar (P > 0.05). Discussion: The present study evaluated the sperm cell and its preparation for receiving the oocyte under optimal conditions. evaluate the sperm cell and its preparation for receiving the oocyte under optimal conditions. Although the swim-up technique promoted higher rates for some of the sperm parameters evaluated, Percoll protocols are the most widely used procedures for selection during the sperm preparation in many species, possibly because of its greater speed, practical method and convenience compared to the swim-up technique. Percoll and mini-Percoll recovered approximately 10 times more cells than swim-up, which is an important feature to be considered during sperm preparation for in vitro fertilization (IVF), being possible to use only one semen straw. The high capacitated and acrosome reaction rates observed after the treatments in the current study, are probably reinforced by changes in sperm cells caused by the cryopreservation process. In order to strength the evidence that frozen-thawed sperm, even after selection, is sensible and reactive to capacitation-like events, we demonstrated the capacitated and acrosome-reacted cell values immediately after the selection treatments behaved differently than when authors used ram fresh sperm. Possibly, this capacitation-like changes observed in frozen-thawed sperm occurs regardless of the selection treatment used. Analyzing the motility parameters immediately after the selection, all treatments maintained or increased the rates compared to the control group. The swim-up, mini-Percoll and Percoll did not differ in any parameters. Given that Percoll and mini-Percoll did not show differences in relation to swim-up for motility parameters, such techniques can be used to replace the latter, obtaining similar sperm samples with good quality. However, swim-up technique involves a procedure that recovers a clean fraction without debris and other types of cells, with high rate of mobile sperm with excellent quality, reason why it can justify the higher recovery of intact spermatozoa after the technique.
650 $aReproduction
650 $aSheep
650 $asperm capacitation
650 $aSpermatozoa
650 $aTreaties
650 $aEspermatozóide
650 $aOvino
650 $aReprodução animal
650 $aSêmen
653 $aCASA
653 $aCTC
653 $aPlasma membrane integrity
653 $aProtocolo
653 $aReproductive techniques
653 $aSperm preparation
700 1 $aSOUZA-FABJAN, J. M. G. de
700 1 $aFONSECA, J. F. da
700 1 $aBALARO, M. F. A.
700 1 $aFREITAS, V. J. de F.
700 1 $aOLIVEIRA, R. V. de
700 1 $aBRANDÃO, F. Z.
773 $tActa Scientiae Veterinariae$gv. 45, p. 1431, 2017.
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Embrapa Caprinos e Ovinos (CNPC) |
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