Consulta: subjectFacets:"Seminiferous tubules"
Registros recuperados: 4
Data/hora: 11/06/2024 19:10:55

The Effect of Cannabis sativa Hydroalcoholic Extract on Sperm Parameters and Testis Histology in Rats
Provedor de dados: 77
Autores: Lotfi,Nahid; Khazaei,Mozafar; Shariatzadeh,Sayyed Mohammad Ali; Soleimani Mehranjani,Malek; Ghanbari,Ali.
Cannabis Sativa is a multiuse herb in traditional medicine, its hydroalcoholic extract (10, 50, and 100 mg/kg) administered interaperitoneally for 14 consequent days to Wistar male rats resulted in significant decrease in progressive motility of sperm. Sperm count and seminiferous tubules diameter decreased significantly in comparison with control group. Also decrease in animal body weight in doses of 50 and 100 mg/kg was observed. Changes in testes weight and serum testosterone were not significant. Cannabis sativa extract has negative effect on sperm parameters such as motility, sperm count, and seminiferous tubules diameter.
Tipo: Journal article
Palavras-chave: Cannabis sativa; Rat; Seminiferous tubules; Sperm parameters.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000100012

Morphological analysis of testes from post-hatch chicks submitted to temperature variation during incubation - doi: 10.4025/actascibiolsci.v33i2.8187
Provedor de dados: 3
Autores: Amaral, Rodrigo de Souza; Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília - UnB; Siqueira Filho, Emivaldo de; Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília - UnB; Coser, Leonardo Augusto Silva; Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília - UnB; Euzebio, Umberto; Departamento de Genética e Morfologia, Instituto de Ciências Biológicas, Universidade de Brasília - UnB.
This study aimed to evaluate the effects of temperature variation during incubation on testicular morphology of post-hatch chicks. We utilized 60 eggs incubated under different temperatures: Group 1 – 37.5°C; Group 2 – 39.5°C; and Group 3 – 34°C. Chicks were weighted and the testes were histologically analyzed. All eggs from Group 3 showed embryonic death. There were no significant differences in body weight and testicular morphology between Groups 1 and 2; however, there was a difference in the diameter of the seminiferous tubules (p &lt; 0.001). The increase in temperature to 39.5°C during incubation causes a decrease in diameter of the seminiferous tubules.
Tipo: Estudos morfológicos
Palavras-chave: 2.06.02.00-6 Gallus gallus domesticus; Thermal stress; Embryonic development; Seminiferous tubules; Morphogenesis Embriologia Gallus gallus domesticus; Thermal stress; Embryonic development; Seminiferous tubules; Morphogenesis.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/8187

Protein restriction during intrauterine and lactation periods: effects on testicular development in pre-puberty rats
Provedor de dados: 3
Autores: Oliveira, Jessica Santana de; Silva, Alluanan Adelson do Nascimento; Magalhães, Carolina Peixoto; Souza, Sandra Lopes de; Silva Junior, Valdemiro Amaro da; Melo, Elizabeth Neves de.
Current study investigates the effects of maternal protein restriction during pregnancy and lactation on the testis of immature rats. Female Wistar rats were mated and, after confirming pregnancy, they were divided into two groups: undernourished group (UG) fed on a diet with casein 8%, and control group (CG) fed on a diet with casein 17 %, during pregnancy and lactation. After weaning, male offspring from the two experimental groups were fed on normal diet up to 35 days old when they were euthanized. Body and testicular weights decreased in UG when compared to those in CG. Volumetric density of seminiferous tubules was higher in CG whilst intertubular space increased in UG. The number of lumenated seminiferous tubules was higher in CG than in UG. Tubular...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.06.00.00-3 testes; Seminiferous tubules; Morphometry; Undernutrition Morfologia.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/21929

Reproduction of the greater bulldog bat Noctilio leporinus (Chiroptera: Noctilionidae) in a mangrove area in southern Brazil
Provedor de dados: 49
Autores: Bordignon,Marcelo Oscar; França,Adriana de Oliveira.
The reproductive pattern of the greater bulldog bat (Noctilio leporinus) was studied in southern Brazil from January to December 1999. The morphological characteristics of their reproductive organs were recorded monthly, through histological analysis of testes and ovaries. Those data were correlated with forearm size and body mass, as well as with external reproductive characteristics. The diameter of the seminiferous tubule increased proportionately to testis mass and body weight, and larger males had greater testis mass. Sexually mature males were recorded throughout the year. Ovary histology revealed that females ovulate between July and December. Lactating females were recorded in nearly every month of the year. Noctilio leporinus has a bimodal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic systems; Neotropics; Reproductive cycle; Seminiferous tubules; Testis mass.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000400006