Spermatozoids
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Seasonal variation in the reproductive activity of male goats raised under tropical climate conditions
ABSTRACT This study analyzed seasonal variations in the testes, the concentration of sex hormones, the parameters of fresh and thawed semen, and the sexual behavior of male Alpine goats from a temperate region in a tropical climate and possible interference with fertility. The maximum and minimum temperature and luminosity were recorded daily, while seminal,
R. Bras. Zootec.. Publicado em: 2017-03
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2. 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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3. Efeitos da metformina no sistema reprodutor em ratas androgenizadas
Objective: To analyze the effects of metformin on the reproductive system of neonatally androgenized female rats that developed permanent estrus. Materials and methods: A total of 75 three-day-old female albino wistar EPM-1 rats were randomized to three 25-animal groups: control (CG), androgenized (AG), and androgenized + metformin (AGmet). The animals in AG
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2010
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4. Efeito da Adição de Dimetilformamida ao Diluente ACP-106 C Sobre as Características do Sêmen Canino Congelado. / Effect of Adding Dimethylformamide the ACP-106 C Diluent About Featured Canine Frozen Semen.
Several studies have been developed in the intention of already improving the protocols existent for the freezing of canine semen. With that the present work had two objectives: 1) to evaluate the effect of the addition of different dimethylformamide concentrations on the characteristics of the canine semen diluted in coconut water in the powder form (ACP-10
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/12/2009
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5. Avaliação andrológica e criopreservação de sêmen de pumas (Puma concolor Linnaeus, 1771) adultos / Andrologic evaluation and cryopreservation of adult cougars (Puma concolor Linnaeus, 1771) semen
The wild felines is one of the most endangered species of the world and its population is affected by some factors that vary geographically because of the alduteration of their habitat, food available, strong hunt pressure or even the low population density. Assisted reproduction techniques such as gametes cryopreservation and in vitro fertilization are fund
Publicado em: 2009
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6. Esteróides gonadais e metabolismo lipídico ao longo do ciclo reprodutivo de Arapaima gigas (SCHINZ, 1822) em ambiente natural / Gonad steroids and lipid metabolism along the reproductive cycle of Arapaima gigas (SCHINZ, 1822) in natural environmet
The aim of the present study was to investigate the possible physiological alterations related with reproduction in males and females of Arapaima gigas (pirarucu) in their natural environment. Pirarucu is an obligatory aerial respiration species belonging to a very ancient group of teleosts and inhabits Amazonian river. The main goals of this study were to d
Publicado em: 2009
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7. Genic transfer in sperm cells in Mus musculus and Ramdia quelem / Transferência gênica em células espermáticas de Mus musculus e Ramdia quelen
Transgenic animals have been used as biological models in studies of the genes functions and their mechanisms of action, as well as to improve animal production. Researchers are trying to produce transgenic animals that will be organs donors in xenotransplants. Another use of the transgenic animal is in the production of recombinant proteins for pharmaceutic
Publicado em: 2009
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8. Minor sperm abnormalities in young male post-pubertal patients with juvenile dermatomyositis
The objective of the present study was to identify sperm abnormalities in young male patients with juvenile dermatomyositis (JDM). In 2005, 18 male JDM patients, diagnosed according to the criteria of Bohan and Peter, were followed at the Pediatric Rheumatology Unit and Rheumatology Division, of our Institution. Of the 18 males, 11 were pre-pubertal and 7 we
Brazilian Journal of Medical and Biological Research. Publicado em: 2008-12
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9. Famílias monoparentais: um olhar psicanalítico / Monoparental families: a psychoanalytic view
This dissertation is the result of the questions raised in the family psychoanalytic practice faced with a significant number of monoparental families affected by similar problems. Such problems consisted of a family crisis situation, which prompted psychological consultation. This is a qualitative study based on the psychoanalytic theory. It includes two ma
Publicado em: 2008
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10. The rattlesnake Crotalus durissus terrificus (Viperidae: Crotalinae) as an experimental model to study the involvement of peptidases in the survival of spermatozoids / A cascavel Crotalus durissus terrificus (Viperidae: Crotalinae) como modelo experimental para o estudo do envolvimento de peptidases na sobrevida de espermatozóides
In the rattlesnake Crotalus durissus terrificus occurs the long-term sperm storage (LTSS), in the female tract, during the interval between mating (autumn) and ovulation (spring). Peptides and peptidases are among the main components that influence the spermatic activity in mammals. The present study aimed to characterize the presence of peptidases in C. d.
Publicado em: 2007
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11. Effect of the sexed semen process through flow cytometry and cryopreservation on the morphometry of spermatozoid heads and chromatin stability / Efeito do processo de sexagem de sêmen por citometria de fluxo e crioprervação sobre a morfometria da cabeça de espermatozóides e estabilidade de cromatina
Bovine sexed semen has been commercially evaluated due to its great economic value for sex selection in milk and beef cattle raising, with purity around 90% for the desired sex. However, its employment depends on the cryopreservation use. The objective of the present study was to analyze the spermatic chromatin stability and morphometric alterations in sperm
Publicado em: 2007
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12. Reproductive Biology, Population Dynamics and Risk of Extinction of Aegla strinatii Türkay, 1972 (Crustacea, Decapoda, Aeglidae) / Biologia reprodutiva, estrutura e dinâmica populacional e avaliação do grau de risco de extinção de Aegla strinatii Türkay, 1972 (Crustacea, Decapoda, Aeglidae)
This study aims to contribute for preservation of the only known population of Aegla strinatii and to reinforce the necessity to preserve the areas where this species occur. Therefore, monthly collections were realized during a two year period at Jacupiranga State Park which is considered to be the second largest conservation unit of São Paulo State. The sp
Publicado em: 2007