Spermatogenesis
Mostrando 37-48 de 459 artigos, teses e dissertações.
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37. Biotechnological approaches to the treatment of aspermatogenic men
Aspermatogenesis is a severe impairment of spermatogenesis in which germ cells are completely lacking or present in an immature form, which results in sterility in approximately 25% of patients. Because assisted reproduction techniques require mature germ cells, biotechnology is a valuable tool for rescuing fertility while maintaining biological fatherhood.
Clinics. Publicado em: 2013
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38. Danos oxidativos e histológicos crônicos causados pelo cádmio no fígado e na espermatogênese de ratos / Oxidative and histological chronic damage caused by cadmium in the liver and in spermatogenesis of rat
Diversos estudos demonstram que o cádmio induz efeitos prejudiciais nos sistema reprodutivo e hepático, porém estudos sobre alterações causadas por baixas doses ainda estão pouco descritos. Este estudo investigou os danos oxidativos e histológicos crônicos em testículo e fígado de ratos expostos a baixas concentrações de cádmio. Cinco grupos exp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/02/2012
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39. Avaliação do desenvolvimento testicular de equinos da raça crioula no período da peri-puberdade / Evaluation of the testicular development of Criollo Horses in the period of the peripuberty
Este estudo teve como objetivos caracterizar modificações no tamanho testicular e concentrações sanguíneas de testosterona relacionadas à idade, avaliar a presença de espematozóides epididimários, mensurar o diâmetro dos túbulos seminíferos e determinar o grau de maturação testicular, através da presença das células germinativas mais avança
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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40. Toxicidade aguda e efeito subletal do Roundup Transorb nos testículos de mato grosso Hyphessobrycon eques (Steindachner, 1882) (Teleostei: Characidae) / Acute toxicity and sublethal effect of Roundup Transorb in testes of mato grosso Hyphessobrycon eques (Steindachner, 1882) (Teleostei: Characidae)
The toxicity of several environmental pollutants has been investigated in humans and other species. Substances contained in agrochemicals, such as herbicides, can affect the reproductive systems of male and female animals. This study aimed to determine the LC50 and sublethal effects of Roundup Transorb on the testicular morphology of mature male Hyphessobryc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/09/2011
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41. Vias de sinalização intracelular envolvidas no efeito proliferativo de relaxina em células de sertoli / Intracelular signaling pathways involved in the proliferative effect of relaxin in rat Sertoli cells
Relaxin is an insulin-related peptide that activates the G-protein coupled receptor RXFP1. Although relaxin plays an important role in female reproduction its physiological role in the male reproductive system is still unclear. We have previously demonstrated that relaxin and RXFP1 are expressed in testis (FILONZI et al., 2007; CARDOSO et al., 2010). Both re
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2011
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42. Reproductive ecology and diet of Cnemidophorus ocellifer Spix 1825 (Squamata: Teiidae) in a coastal area from northeastern Brazil / Ecologia reprodutiva e dieta de Cnemidophorus ocellifer Spix 1825 (Squamata: Teiidae) em Ãrea de tabuleiro no nordeste do Brasil
Chapter 1:Reproduction of Cnemidophorus ocellifer was studied based on data collected from September 2009 to August 2010 in a coastal area of the SÃo GonÃalo do Amarante municipality, CearÃ, Brazil. Lizards were captured by manual collection, with the aid of pressure rifle or tourniquet and, after dead, individuals were dissected for sex determination by
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/02/2011
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43. Effects of catuaba cristal® on the testis of wistar rats
The aim of this study was to evaluate the possible beneficial effects of Catuaba Cristal® (CC), an alcoholic drink made from wine and Erythroxylum catuaba Ar. Cam on testis. Wistar rats either received CC solution (n=8) or water (n=9). Results showed significant body weight reduction within the CC group, although, no weight changes were observed for liver,
Brazilian Archives of Biology and Technology. Publicado em: 2011-10
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44. Dosagem hormonal e avaliação testicular em cachorro-do-mato (Cerdocyun thous) utilizando diferentes protocolos anestésicos
Tree Cerdocyon thous males received different anesthesia protocols: tiletamine-zolazepan (7mg/kg); ketamine-xylazine (12 and 1mg/kg); ketamine-xylazine-atropin (12, 1.0 and 0.04mg/kg), ketamine-midazolam (12 and 0.5mg/kg) and ketamine-acepromazine (12 and 0.1mg/kg) for semen collection by electroejaculation, testosterone hormonal dosages, fine needle aspirat
Arquivo Brasileiro de Medicina Veterinária e Zootecnia. Publicado em: 2011-10
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45. Sclerotherapy of hydroceles and spermatoceles with alcohol: results and effects on the semen analysis
PURPOSE: To evaluate the success rates of sclerotherapy of the tunica vaginalis with alcohol for the treatment of hydroceles and/or spermatoceles, as well as, evaluation of pain, formation of hematomas, infection and its effects in spermatogenesis . MATERIALS AND METHODS: A total of 69 patients, with offsprings and diagnosis of hydrocele and/or spermatocele,
International braz j urol. Publicado em: 2011-06
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46. Novel concepts in male infertility
Extraordinary advances have been achieved in the field of male infertility in the last decades. There are new concepts in sperm physiology and several modern tools for the assessment of spermatogenesis kinetics in vivo. New tests using molecular biology and DNA damage assays allow the clinician to correctly diagnose men so far classified as having idiopathic
International braz j urol. Publicado em: 2011-02
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47. Caracterização genética de bovinos por meio de estudos de cromossomo Y e do DNA mitocondrial.
ABSTRACT: Domestic cattle breeds are classified in two subspecies: Bos taurus taurus, which have an european origin and Bos taurus indicus, the zebuines, originated in India. The main phenotypic difference between them is the presence of the hump, observed in the zebuines and absent in taurines. In addition, the sexual Y chromosome has been considered as a m
Planaltina. Publicado em: 2011
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48. A transcriptome analysis of mitten crab testes (Eriocheir sinensis)
The identification of expressed genes involved in sexual precocity of the mitten crab (Eriocheir sinensis) is critical for a better understanding of its reproductive development. To this end, we constructed a cDNA library from the rapid developmental stage of testis of E. sinensis and sequenced 3,388 randomly picked clones. After processing, 2,990 high-quali
Genetics and Molecular Biology. Publicado em: 19/11/2010