Spermatozoid
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Reproductive effects of the psychoactive beverage ayahuasca in male Wistar rats after chronic exposure
Abstract Ayahuasca is a psychoactive beverage used ancestrally by indigenous Amazonian tribes and, more recently, by Christian religions in Brazil and other countries. This study aimed to investigate the reproductive effects of this beverage in male Wistar rats after chronic exposure. The rats were treated by gavage every other day for 70 days at 0 (control)
Rev. bras. farmacogn.. Publicado em: 2017-06
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2. 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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3. Parâmetros genéticos de características reprodutivas de touros e vacas Gir Leiteiro / Genetic parameters for reproductive traits of bulls and cows Dairy Gyr breed
Data of 2,274 semen output from 200 sires, 7,055 measurements of age at first calving (AFC) from females and 141 measurements of scrotal circumference (SC) were used to determine genetic parameters for reproductive traits of males and females of Dairy Gyr breed. Were studied physical aspects such as volume (VOL), concentration (CONC), vigor (VIG), motility (
Publicado em: 2009
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4. 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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5. Effect of temperature and air humidity on the seminal characteristics of roosters housed in semi airconditioned sheds / Efeito da temperatura e umidade do ar sobre as características seminais de galos alojados em galpões semiclimatizados
Foi avaliado o efeito da temperatura e umidade do ar sobre as características do sêmen de galos da linhagem Cobb 500, de 45 a 65 semanas de idade, alojados em galpão semiclimatizado. Os galos foram mantidos separados em um espaço de 90 x 90 x 90 cm e as coletas de sêmen foram realizadas quinzenalmente, totalizando 267 amostras. Quanto à análise estat�
Publicado em: 2005
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6. Efeito da temperatura e umidade do ar sobre as caracterÃsticas seminais de galos alojados em galpÃes semiclimatizados / Effect of temperature and air humidity on the seminal characteristics of roosters housed in semi airconditioned sheds
The Effect of temperature and air humidity on the seminal characteristics of Cobb 500 strain roosters 45 to 65 weeks old housed in a semi air-conditioned shed was assessed. The roosters were kept separately in a 90 x 90 x 90 cm cage and semen collections were made fortnightly, totaling 267 samples. In relation to the statistical analysis, the Kruskal-Wallis
Publicado em: 2005
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7. Characterization of MADS-box genes in charophycean green algae and its implication for the evolution of MADS-box genes
The MADS-box genes of land plants are extensively diverged to form a superfamily and are important in various aspects of development including the specification of floral organs as homeotic selector genes. The closest relatives of land plants are the freshwater green algae charophyceans. To study the origin and evolution of land plant MADS-box genes, we char
National Academy of Sciences.
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8. CD36 mRNA and Protein Expression Levels Are Significantly Increased in the Heart and Testis of apoE Deficient Mice in Comparison to Wild Type (C57BL/6)
CD36, an 88kd-adhesion molecule, plays a major role as a scavenging receptor implicated in cellular lipid metabolism. Secretory mammary epithelium, microvasculature endothelium, adipocytes, smooth muscle cells, and platelets express CD36. In addition, CD36 expression is significantly enhanced in macrophages differentiating into foam cells. The effect of path