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| Registros recuperados: 126 | |
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| Maia,Bernardo Porto; Silveira,Jéssica de Oliveira; Borges,Mariana Garcia Lisboa; Pereira,Danilo Ales Ponzi; Pinheiro,Julyara Lima; Freitas,Jofre Jacob da Silva; Kietzer,Katia Simone. |
| Androgenic anabolic steroids (AAS) are artificial testosterone analogues, used as medicine in chronic diseases, because they increase protein synthesis generating muscle hypertrophy. Its effect has caught the attention of athletes and gym users, thus their consumption has become epidemic, due to easy marketing, the immediate results and the false impression that it doesn't carry health risks. Such risks may globally harm the body. This study aims to investigate the influence on spermatogenesis of using nandrolone decanoate with or without physical training. Twenty-four rats, divided into four groups were used: sedentary group (SG), sedentary on steroids group (SSG), trained group (TG) and trained on steroids group (TSG). The animals were trained on... |
| Tipo: Journal article |
Palavras-chave: Spermatogenesis; Anabolic agents; Nandrolone; Exercise; Fertility. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000300046 |
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| Boemler Hollenbach,Clarissa; Bortolini,Carlos Eduardo; Mattos Rodrigues,Juliano; Hirtz,Lucas; Bastos de Mello,Fernanda; Braga de Mello,João Roberto. |
| The present study evaluates the effects of two commercial phytotherapic formulations containing Glycine max (L.) Merr. (Soy) (Phytotherapic A and Phytotherapic B) on Wistar rat fertility. Doses were based on the manufacturer's recommendation and increased in a logarithmic scale. The animals were divided into six experimental groups and a control group, which received distillated water. Three groups were treated with Phytotherapic A and three groups were treated with Phytotherapic B. The doses were: 4.3mg.kg-1.day-1, 21.5 mg.kg-1.day-1 and 43 mg.kg-1.day-1, respectively, for GPA1, GPA2, GPA3, and GPB1, GPB2, GPB3. The males were treated during ninety-one days, before and during the mating. Female Wistar rats were treated before and during the mating,... |
| Tipo: Journal article |
Palavras-chave: Soy; Glycine max; Phytotherapic; Male rats; Fertility; Toxicity. |
| Ano: 2012 |
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2012000100005 |
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| Park,Seul-Ki; Park,Sang-Kyu. |
| Electrolyzed-reduced water (ERW) scavenges reactive oxygen species and is a powerful anti-oxidant. A positive correlation between oxidative stress and aging has been proved in many model organisms. In Caenorhabditis elegans, many long-lived mutants showed reduced fertility as a trade off against longevity phenotype. We aimed to study the effect of ERW on oxidative stress, fertility and lifespan of C. elegans. We also investigated the genetic pathway involved in the effect of ERW on resistance to oxidative stress and lifespan. We compared lifespan and fertility of worms in media prepared with distilled water and ERW. ERW significantly extended lifespan and increased the number of progeny produced. Then the effect of ERW on resistance to oxidative stress and... |
| Tipo: Journal article |
Palavras-chave: Electrolyzed-reduced water; Aging; Daf-16; Fertility; Lifespan. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000200005 |
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| SILVA, A. E. D. F.; NUNES, J. F.. |
| Resumo: Em dez ovinos deslanados das racas Santa Ines e Somalis brasileira, sendo cinco de cada, foi coletado e ejaculado espermatico, atraves da vagina artificial, durante um ano. O objetivo foi avaliar a atividade sexual do macho ovino, nas condicoes do Nordeste brasileiro, no periodo seco (agosto a dezembro de 1983) e chuvoso (janeiro a maio de 1984) e as diferencas entre racas. Na avaliacao do esperma houve uma diferenca (P<0,001) entre racas, a Santa Ines mostrando maior volume e concentracao do que a Somalis brasileira. Nao se obtiveram diferencas quanto a porcentagem de espermatozoides vivos e motilidade progressiva. Na epoca seca, o volume e a concentracao foram menores que na epoca chuvosa (P<0,001). Porem a porcentagem de espermatozoides... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Raça Santa Inês; Raça Somalis brasileira; Atividade sexual; Macho; Sexual activity; Fertility; Male animals.; Ovino; Reprodução animal; Fertilidade; Sêmen; Espermatozóide; Sheep; Spermatozoa; Males.. |
| Ano: 1987 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/514257 |
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| Carreau,S.; Silandre,D.; Bourguiba,S.; Hamden,K.; Said,L.; Lambard,S.; Galeraud-Denis,I.; Delalande,C.. |
| The mammalian testis serves two main functions: production of spermatozoa and synthesis of steroids; among them estrogens are the end products obtained from the irreversible transformation of androgens by a microsomal enzymatic complex named aromatase. The aromatase is encoded by a single gene (cyp19) in humans which contains 18 exons, 9 of them being translated. In rats, the aromatase activity is mainly located in Sertoli cells of immature rats and then in Leydig cells of adult rats. We have demonstrated that germ cells represent an important source of estrogens: the amount of P450arom transcript is 3-fold higher in pachytene spermatocytes compared to gonocytes or round spermatids; conversely, aromatase activity is more intense in haploid cells. Male germ... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aromatase; Estrogens; Estrogen receptors; Male germ cells; Fertility; Mammals. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000600003 |
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| El Abed, A.; Ben Said, R.; Romdhane, M.S.. |
| A population of the brown alga Padina pavonica has been studied in the locality of Cap Zebib (North of Tunisia) between September 2000 and August 2001. Abiotic factors (temperature ,salinity , oxygen ) and biotic ones (weight, height, diameter, biomass, and fertility) were carried out . The results showed that temperature varied between 12°C (February) and 24.5 °C (July). Salinity has recorded a little variation during the year .Oxygen ranged between 4.4 mg/l( March) and 10mg/l (November).Padina pavonica changed monthly . The weight ranged between 0.39g (February) and 18.8 g (August) . Minimum and maximum height were recorded respectively in January (2.07 cm) and September (7.3 cm) . Diameter varied between 1.32 cm (December) and 8.9 cm (August) .... |
| Tipo: Journal Contribution |
Palavras-chave: Algae; Fertility; Biomass; Length-weight relationships; Brown algae; Http://aims.fao.org/aos/agrovoc/c_35039. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/247 |
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| FUKUI, Yutaka; KOHNO, Hirohide; OKABE, Kentaro; KATSUKI, Sara; YOSHIZAWA, Masahiro; TOGARI, Tetsuro; WATANABE, Hiroyuki; 福井, 豊. |
| In this study, two successive field trials were conducted during the non-breeding season to investigate various factors affecting on fertility of Suffolk ewes after intrauterine insemination with frozen-thawed semen. In the first year (Experiment 1), three sperm numbers per insemination dose (0.25, 0.5 and 1 million sperm) and five sheep farms were used, and in the second year (Experiment 2), parity, age, body weight, body condition score (BCS) and postpartum days were investigated to compare pregnancy and lambing rates. High pregnancy and lambing rates (70.6 and 70.6%, respectively) were obtained with 0.25 million sperm per dose. There were no significant differences in the pregnancy and lambing rates among the five farms, but there was a tendency for one... |
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Palavras-chave: Artificial insemination; Fertility; Frozen semen; Sheep. |
| Ano: 2010 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2817 |
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| Ribero, Rocio. |
| This paper analyzes how family structure and fertility alter children quality in Colombia. Reduced form models to determine marital status of women and number of children ever born are estimated considering factors that affect women's bargaining powers inside the marriage. Tentative estimates of structural interdependence between these variables and children outcomes are outlined, revealing that marriage has a positive link with child quality and fertility has a negative link with child quality. Colombian national household survey data at rural and urban levels are used for the estimations. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Family structure; Fertility; Child quality; Consumer/Household Economics; J00; J12; J13. |
| Ano: 2000 |
URL: http://purl.umn.edu/28390 |
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| Hossain, Mohammad; Tisdell, Clement A.. |
| This paper examines the causal links between fertility and female labor force participation in Bangladesh over the period 1974-2000 by specifying a bivariate and several trivariate models in a vector error correction framework. The three trivariate models alternatively include average age at first marriage for females, per capita GDP and infant mortality rate, which control for the effects of other socio-economic factors on fertility and female labor force participation. All the specified models indicate an inverse long-run relationship between fertility and female labor force participation. While the bivariate model also indicates bidirectional causality, the multivariate models confirm only a unidirectional causality – from labor force participation... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Fertility; Female Labor Force Participation; Causality; Labor and Human Capital; C32; J13; J22. |
| Ano: 2003 |
URL: http://purl.umn.edu/106947 |
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| Sinha, Nistha. |
| Despite the attractiveness of experiments from the perspective of program evaluation, there have been very few program experiments in the area of family planning. This paper evaluates an ongoing family planning program experiment in rural Bangladesh. The paper estimates the effect of mothers' program exposure on fertility and children's time allocation. The results show that while the program was effective in reducing fertility, it had no significant impact on children's school enrollment. However, the program appears to have significantly raised boys' participation in the labor force. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Fertility; Child labor; School enrollment; Program evaluation; Labor and Human Capital; J13; J22; I21. |
| Ano: 2003 |
URL: http://purl.umn.edu/28457 |
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| Guinnane, Timothy W.; Moehling, Carolyn M.; Grada, Cormac O. |
| Ireland's relatively late and feeble fertility transition remains poorly-understood. The leading explanations stress the role of Catholicism and a conservative social ethos. This paper reports the first results from a project that uses new samples from the 1911 census of Ireland to study fertility in Dublin and Belfast. Our larger project aims to use the extensive literature on the fertility transition elsewhere in Europe to refine and test leading hypotheses in their Irish context. The present paper uses a sample from the Dublin suburb of Pembroke to take a first look at the questions, data, and methods. This sample is much larger than those used in previous studies of Irish fertility, and is the first from an urban area. We find considerable support for... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Ireland; Fertility; Demography; Labor and Human Capital; J1; N3. |
| Ano: 2001 |
URL: http://purl.umn.edu/28434 |
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| Registros recuperados: 126 | |
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