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| Registros recuperados : 150 | |
| 19. |  | AGUIAR, R. T. de; RABELLO, L. M. Sistema de monitoramento e controle de comunicação via rádio entre aeronave de pulverização e sensores de solo. In: JORNADA CIENTÍFICA - EMBRAPA SÃO CARLOS, 10., 2018, São Carlos, SP. Anais... São Carlos: Embrapa Instrumentação: Embrapa Pecuária Sudeste, 2018. p. 73. Editores técnicos: Daniel Souza Corrêa, Elaine Cristina Paris, Maria Alice Martins, Paulino Ribeiro Villas Boas, Wilson Tadeu Lopes da Silva. (Embrapa Instrumentação. Documentos, 68). (Embrapa Instrumentação. Documentos, 68).| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 150 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
22/12/1999 |
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Data da última atualização: |
22/12/1999 |
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Autoria: |
RABELLO, L. M.; CRUVINEL, P. E.; BERTUCCI NETO, V. |
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Afiliação: |
EMBRAPA-CNPDIA. |
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Título: |
Computerized system for embryos freezing protocols development. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONFERENCE ON PHYSICS AND INDUSTRIAL DEVELOPMENT: BRIDGING THE GAP, 2., July 1996, Belo Horizonte, MG. Abstracts... Belo Horizonte: UFMG, 1996. |
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Páginas: |
PB14. |
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Idioma: |
Inglês |
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Conteúdo: |
The major objective of research in cryopreservation of embryos must be to improve survival rates so that there is little or no difference between pregnancy rates of cryopreserved an fresh embryos. A second, nearly as important objective should be to simplify procedures so that they are easily carried out under routine field conditions. The present report describes a computerized system for the development of embryos freezing protocols. The design was carried out in order to find optimum performance in operation and the most important parameter observed was a quasi-real thermometer response time. We used a discrete controller, which is equivalent of the three-mode proportional-plus-integral-plus-derivative (PID) controller for digital feedback loops. A number of dedicated and discrete algorithms were also developed in order to allow user's flexibility to program different temperature's ramps with relate to the controller gain, reset times, derivation time to the gain, time constants, and adequated dead time as a function of the required process models. The system allows to program temperature in the range of -40 to +40 Celsius degrees starting from 0.1 Celsius degree/minute and going up to 2.5 Celsius degrees/minute temperature rate. The refrigerant R-502 was used allowing both, optimization of the refrigerator design and reliability. The algorithms for controller, definition of the freezing protocols, and the interface to users were developed in C++ language under a DOS environment. MenosThe major objective of research in cryopreservation of embryos must be to improve survival rates so that there is little or no difference between pregnancy rates of cryopreserved an fresh embryos. A second, nearly as important objective should be to simplify procedures so that they are easily carried out under routine field conditions. The present report describes a computerized system for the development of embryos freezing protocols. The design was carried out in order to find optimum performance in operation and the most important parameter observed was a quasi-real thermometer response time. We used a discrete controller, which is equivalent of the three-mode proportional-plus-integral-plus-derivative (PID) controller for digital feedback loops. A number of dedicated and discrete algorithms were also developed in order to allow user's flexibility to program different temperature's ramps with relate to the controller gain, reset times, derivation time to the gain, time constants, and adequated dead time as a function of the required process models. The system allows to program temperature in the range of -40 to +40 Celsius degrees starting from 0.1 Celsius degree/minute and going up to 2.5 Celsius degrees/minute temperature rate. The refrigerant R-502 was used allowing both, optimization of the refrigerator design and reliability. The algorithms for controller, definition of the freezing protocols, and the interface to users were developed in C++ language under a DOS envi... Mostrar Tudo |
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Palavras-Chave: |
Embrioes; Embryos; Protocolos; Protocols. |
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Thesagro: |
Criopreservação. |
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Thesaurus NAL: |
cryopreservation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02213naa a2200229 a 4500
001 1027060
005 1999-12-22
008 1996 bl --- 0-- u #d
100 1 $aRABELLO, L. M.
245 $aComputerized system for embryos freezing protocols development.
260 $c1996
300 $aPB14.
520 $aThe major objective of research in cryopreservation of embryos must be to improve survival rates so that there is little or no difference between pregnancy rates of cryopreserved an fresh embryos. A second, nearly as important objective should be to simplify procedures so that they are easily carried out under routine field conditions. The present report describes a computerized system for the development of embryos freezing protocols. The design was carried out in order to find optimum performance in operation and the most important parameter observed was a quasi-real thermometer response time. We used a discrete controller, which is equivalent of the three-mode proportional-plus-integral-plus-derivative (PID) controller for digital feedback loops. A number of dedicated and discrete algorithms were also developed in order to allow user's flexibility to program different temperature's ramps with relate to the controller gain, reset times, derivation time to the gain, time constants, and adequated dead time as a function of the required process models. The system allows to program temperature in the range of -40 to +40 Celsius degrees starting from 0.1 Celsius degree/minute and going up to 2.5 Celsius degrees/minute temperature rate. The refrigerant R-502 was used allowing both, optimization of the refrigerator design and reliability. The algorithms for controller, definition of the freezing protocols, and the interface to users were developed in C++ language under a DOS environment.
650 $acryopreservation
650 $aCriopreservação
653 $aEmbrioes
653 $aEmbryos
653 $aProtocolos
653 $aProtocols
700 1 $aCRUVINEL, P. E.
700 1 $aBERTUCCI NETO, V.
773 $tIn: INTERNATIONAL CONFERENCE ON PHYSICS AND INDUSTRIAL DEVELOPMENT: BRIDGING THE GAP, 2., July 1996, Belo Horizonte, MG. Abstracts... Belo Horizonte: UFMG, 1996.
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