Freezing Semen
Mostrando 13-24 de 42 artigos, teses e dissertações.
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13. Criopreservação de espermatozóides eqüinos comparando duas curvas de congelamento combinadas com diluentes comerciais: uma análise laboratorial / Cryopreservation of equine spermatozoa comparing different freezing rates combined with comercial extenders: laboratorial analysis
Durante o processo de criopreservação de sêmen, os espermatozóides sofrem alguns danos que resultam na diminuição da fertilidade deste. O presente estudo foi realizado a fim de avaliar o efeito da utilização, combinada de duas curvas de congelamento com dois diluentes comerciais sobre a criopreservação de sêmen eqüino. Foram analisados 20 ejacula
Publicado em: 2009
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14. AVALIAÇÃO CINÉTICA DO SÊMEN DE PIRAPITINGA (Piaractus brachypomus) CONGELADO EM MEIO À BASE DE ÁGUA DE COCO EM PÓ (ACP-104) OU RINGER EM TRÊS MEIOS DE ATIVAÇÃO
The pirapitinga, Piaractus brachypomus (CUVIER, 1818) is a Characidade freshwater fish that inhabits the Amazon and Orinoco River basins. The aim of this study was determinate spermatic motility of cryopreserved sperm of pirapitinga in three different activation solutions. Sperm samples were diluted in four freezing media prepared by a combination of two ext
Publicado em: 2009
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15. Strategies for commercialization of cryopreserved fish semen
Initial success in sperm cryopreservation occurred at about the same time for aquatic species and livestock. However, in the 50 plus years since then cryopreserved sperm of livestock has grown into a billion-dollar global industry, while cryopreserved sperm of aquatic species remains a research activity with little commercial application despite work in more
Revista Brasileira de Zootecnia. Publicado em: 2008-07
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16. Protein profile of swine seminal plasma and its association with quality of frozen semen / Perfil protéico do plasma seminal de suínos e sua associação com a qualidade do sêmen congelado
Artificial insemination (AI) in swine with frozen semen presents lower reproductive performance than AI with cooled semen. Such inefficiency can be attributed to many factors, especially to the semen extenders and individual boar effects, since boars may have different protein content in their seminal plasma. The objective of this study was to evaluate the p
Publicado em: 2008
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17. Motilidade espermÃtica de sÃmen de peixes criopreservado em diferentes meios avaliada por mÃtodo subjetivo e computadorizado / Motility of fish sperm cryopreserved in different freezing media evaluated subjectively and by computerized system.
Pirapitinga (Piaractus brachypomus) and curimba (Prochilodus lineatus) are Characiforme fish species, of economic and ecological importance. The aims of this study were to (a) evaluate different freezing media for semen of both species; (b) compare post-thaw sperm motility subjectively evaluated under light microscope and computerized system SCAÂ for both s
Publicado em: 2008
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18. Efeito do laser diodo sobre as características de motilidade, de integridade das membranas plasmática e acrossomal e de potencial de membrana mitocondial de espermatozóides criopreservados de eqüinos / Effect of diode laser on motility, plasma and acrosomal membrane integrity, and mitochondrial membrane potential of cryopreserved stallion spermatozoa
Sperm motility depends on energy consumption. In some species sperm mitochondria play an important role in the production of energy for tail activity. Low-level laser irradiation increases this production as a modulation tool. The objective of this study was to analyze the effect of a continuous 650 nm wavelength diode laser irradiation, with dose 6 J/cm2 fo
Publicado em: 2008
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19. Protein profile of swine seminal plasma and its association with quality of frozen semen / Protein profile of swine seminal plasma and its association with quality of frozen semen / Perfil protéico do plasma seminal de suínos e sua associação com a qualidade do sêmen congelado / Perfil protéico do plasma seminal de suínos e sua associação com a qualidade do sêmen congelado / Perfil protéico do plasma seminal de suínos e sua associação com a qualidade do sêmen congelado / Protein profile of swine seminal plasma and its association with quality of frozen semen
A inseminação artificial (IA) em suínos com sêmen congelado apresenta índices de desempenho reprodutivo insatisfatórios, em comparação com a IA com sêmen resfriado. Entre outros fatores, esta ineficiência pode ser atribuída aos diluentes e à variação entre os machos doadores de sêmen, que podem apresentar diferente conteúdo de proteínas no p
Publicado em: 2008
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20. Uso de glicerol, metil-formamida e dimetil-formamida como crioprotetores do sêmen canino / Use of glycerol, methyl-formamide and dimethyl-formamide as cryoprotectants of canine semen
A crescente demanda por biotécnicas reprodutivas em cães tem despertado grande interesse no desenvolvimento de protocolos de congelação de sêmen canino que, associados à correta identificação do momento ótimo para a inseminação, resultem em taxas de fertilidade próximas às da inseminação artificial com sêmen fresco ou resfriado. A grande vant
Publicado em: 2008
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21. Use of propolis and ascorbic acid on goat semen cryopreservation / Uso da própolis e do ácido ascórbico na criopreservação do sêmen caprino
The objectives of this study were to verify if the propolis and ascorbic acid contain effect on plasmatic membrane integrity of goats spermatozoa as well as investigate the potential of these antioxidants on the use of goats spermatozoa cryopreservation extenders. Semen from five adults goats were used, totalizing 5 semen samples for each one. After semen co
Publicado em: 2008
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22. Manejo reprodutivo da piracanjuba (Brycon orbignyanus): congelamento de sÃmen e taxas de fertilidade. / Reproduction management of piracanjuba (Brycon orbignyanus): semen freezing and fertility rates
Este experimento tem como objetivo a aplicaÃÃo da biotecnologia sobre o manejo reprodutivo da piracanjuba visando o aperfeiÃoamento das tÃcnicas de congelamento do sÃmen; avaliar a melhor dose de espermatozÃide a ser utilizada na fertilizaÃÃo de ovÃcitos; e verificar a influÃncia de diferentes volumes de Ãgua utilizados como ativador dos espermato
Publicado em: 2008
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23. Criopreservação de sêmen canino com um diluidor à base de água de coco na forma de pó (ACP-106): Efeito da temperatura de adição do glicerol e da adição de antibiótico. / Cryopreservation of canine semen with a diluent based on coconut water as a powder (ACP-106 ): Temperature effect of adding glycerol and the addition of antibiotic.
Researches have been developed aiming to improve the already existing protocols for canine semen freezing. In this way, this work was divided in two experiments, aiming: 1) to compare the effect of glycerol addition at two temperatures (27 and 4C) on canine semen extended and frozen with powdered coconut water extender (ACP-106); 2) to analyze the effect of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/12/2007
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24. Effects of pentoxifylline treatment before freezing on motility, viability and acrosome status of poor quality human spermatozoa cryopreserved by the liquid nitrogen vapor method
The objective of the present study was to investigate the effects of the direct addition of pentoxifylline (PF) to the ejaculates of men with poor sperm quality before freezing on post-thaw sperm motility, viability, acrosome integrity, and agonist-induced acrosome reaction. Semen specimens from 16 infertile men with impaired sperm count and motility (oligoa
Brazilian Journal of Medical and Biological Research. Publicado em: 04/06/2007