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| 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 < 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 |
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| 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 |
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| 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 |
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