Sperm Viability
Mostrando 25-36 de 71 artigos, teses e dissertações.
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25. Insulin addition to swine semen diluted and cooled at 15 ºC
The objective of this study was to evaluate the effect of adding different doses of insulin to swine semen processed and stored at 15 ºC. The experiment used sixteen ejaculates from four commercial breeding pigs, distributed in a randomized block design (ejaculate) with split plot along time (0, 24, 48 and 72 hours of storage) with four treatments (insulin
Revista Brasileira de Zootecnia. Publicado em: 2012-04
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26. Desvio de segregação em humanos / Segregation distortion in humans
The transmission ratio distortion (TRD), a biological process defined as a deviation from Mendelian predictions, is caused by different mechanisms: nonrandom segregation of chromosomes during meiosis or gametic and postzygotic viability selection. In order to investigate TRD in humans, we have studied a family with an overtransmitted pathogenic deletion in t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2011
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27. Cigarette smoking impairs sperm bioenergetics
OBJECTIVE: The growing consensus on the negative impact of cigarette smoking on fertility prompted us to compare the rate of sperm respiration in smokers and non-smokers. MATERIALS AND METHODS: Semen samples from 20 smokers and 58 non-smokers consulting at the andrology laboratory for fertility evaluation were used. Smoking was defined as consumption of at l
International braz j urol. Publicado em: 2010-02
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28. Resistance of human spermatozoa to cryoinjury in repeated cycles of thaw-refreezing
Objective: To study the resistance of human spermatozoa to cryoinjury in repeated cycles of thaw-refreezing by using the fast liquid nitrogen vapor method. Material and Methods: Semen specimens were obtained from sixteen normal and oligozoospermic individuals who required disposal at the sperm bank. Five of them had testicular cancer. Specimens were thawed a
International braz j urol. Publicado em: 2009-10
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29. Influência da distrofia muscular do Golden Retriever (GRMD) na viabilidade espermática e nas características morfológicas do aparelho reprodutivo masculino / Influence of Golden Retriever muscular dystrophy (GRMD) on sperm viability and on morphologic characteristics of the male reproductive tract
Muscular dystrophies constitute a group of diseases characterized by progressive and irreversible muscle degeneration. Duchenne´s Muscular Dystrophy (DMD) is a lethal myopathy caused by dystrophin deficiency, a muscular cell cytoskeleton protein. The dystrophin gene have recessive characteristic and is located in the p21 portion of the X chromosome. Advance
Publicado em: 2009
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30. Use of biotech manipulation of oocytes enclosed in preantral follicles for in vitro evaluation of potential anti-zona pellucida to imunoesterilização bitches. / Utilização da biotécnica de manipulação de oócitos inclusos em folículos pré-antrais para a avaliação in vitro do potencial de anticorpos anti-zona pelúcida para a imunoesterilização de cadelas.
The aim of this study was do evaluate the potential of anti-zona pellucida antibodies for immunosterilization in dogs, through analyzing the capability of anti-porcine zona pellucida (pZP) antibodies to cause atresia of preantral follicles (PF). For this purpose, the biotechnique of manipulation of oocytes enclosed in preantral follicles was employed to esta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/12/2008
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31. Avaliação do sêmen ovino diluído e congelado em meio à base de água de coco em pó (ACP-102c) ou Tris. / Evaluation of sheep semen diluted and frozen in the middle of the base of coconut milk powder (ACP-102C) or Tris.
The cryopreservated semen at artificial insemination programs is a value tool for genetic and ovine breed conservation programs. To facilitate the disponibility of seminal extenders and reduce the costs, it was developed a vegetal extender based on powder coconut water (PCW- 102), that shown satisfactory results in chilled ram semen. However, there is a lack
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/12/2008
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32. 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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33. Caracterização, criopreservação e manipulação genética do sêmen do linguado Paralichthys orbignyanus (Teleostei: Paralichthyidae).
The Brazilian flounder Paralichthys orbignyanus is an important fishing resource from southern Atlantic coast of America and it has being considered for aquaculture. The sperm quality is an important variable in reproductive management of cultured species, influencing directly on the production of viable eggs. Moreover, the adequate knowledge of physical and
Publicado em: 2008
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34. Influência de sistemas de refrigeração sobre a qualidade do sêmen ovino criopreservado em palhetas
This study aimed to evaluate the influence of different types of cooling systems upon the post-thawing quality of ram semen, through the measurement and comparison of cooling rates. The parameters were motility, vigor, morphology damages, viability and acrossomal state through the use of Trypan-blue/giemsa coloration, at the end of the 90 minutes of cooling
Publicado em: 2008
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35. 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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36. 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