Endocrine Disruption
Mostrando 1-12 de 31 artigos, teses e dissertações.
-
1. Reproductive physiology of the heat-stressed dairy cow: implications for fertility and assisted reproduction
Abstract Heat stress causes a large decline in pregnancy success per insemination during warm times of the year. Improvements in fertility are possible by exploiting knowledge about how heat stress affects the reproductive process. The oocyte can be damaged by heat stress at the earliest stages of folliculogenesis and remains sensitive to heat stress in the
Anim. Reprod.. Publicado em: 28/11/2019
-
2. A case of intersex occurrence in Steindachneridion parahybae (Steindachner, 1877) (Siluriformes: Pimelodidae) under captivity condition: a cytogenetic and morphological study
ABSTRACT Little is known about reproductive biology of endangered Steindachneridion parahybae , a gonochoristic teleost species inhabiting the Paraíba do Sul River Basin, and herein is the first description of intersex in S. parahybae juvenile. The normal appearance of ovaries and testes in juvenile from the same lot of breeding were also described for comp
Neotrop. ichthyol.. Publicado em: 22/12/2016
-
3. Oceanografia e Química: unindo conhecimentos em prol dos oceanos e da sociedade
The marine environment is certainly one of the most complex systems to study, not only because of the challenges posed by the nature of the waters, but especially due to the interactions of physical, chemical and biological processes that control the cycles of the elements. Together with analytical chemists, oceanographers have been making a great effort in
Quím. Nova. Publicado em: 2013
-
4. Evidências de desregulação endócrina causada pela exposição aquática ao alumínio e ao manganês em Astyanax bimaculatus (Linnaeus, 1758) / Evidences of endocrine disruption caused by aquatic exposure to aluminum and manganese in Astyanax bimaculatus (Linnaeus, 1758)
Metals such as Aluminum (Al) and Manganese (Mn) are found in nature as well as in industrial effluents, and can be toxic to aquatic biota, with endocrine disrupting effects, e.g. for fish, which can affect the reproductive performance of a species. Rivers and tributaries of São Paulo State, even in theoretically preserved areas, have shown an increase in th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/09/2012
-
5. Determinação de hormônios estrógenos e progestágenos em amostras ambientais por GC-MS
Due to the constant increase in population, the level of pollution on the planet has grown mainly in aquatic environments. Some of these contaminants present regulation but a fraction of these, called "emerging", besides being continuously released into the environment without any control, have no regulation. Sex hormones are part of these emerging contamina
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
-
6. EFEITO DA EXPOSIÇÃO PERINATAL AO HERBICIDA GLIFOSATO-ROUNDUP NA DIFERENCIAÇÃO SEXUAL E ENDOCRINOLOGIA REPRODUTIVA / nao
O Glifosato-Roundup é um herbicida amplamente utilizado e considerado um potente desregulador endócrino quando administrado para ratos Wistar na fase pré-púbere. Este trabalho teve como objetivo avaliar os efeitos causados por este herbicida na prole de fêmeas tratadas durante o período perinatal. Foram utilizados como modelos experimentais 38 ratos Wi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2011
-
7. Efeito do hipertiroidismo experimental, induzido em ratas durante a gestação, sobre componentes do sistema renina-angiotensina cardíaco da prole. / Effect of experimental hyperthyroidism induced in female rats during pregnancy in the components of cardiac Renin-Angiotensin System of the offspring.
During normal gestation, the Renin-Angiotensin System (RAS) exerts an important role in salt balance, blood pressure and water homeostasis and, consequently, in the welfare of mother and fetus. In this sense, it is important to highlight both the classic RAS (initially described as a purely endocrine system), and the local RAS, in this case, the uteroplacent
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/02/2011
-
8. Exposición prenatal a los plaguicidas organoclorados y criptorquidia
Fetuses and children are more susceptible to the effects of environmental toxins. The objective of this article is to determine the levels of organochlorine pesticides (HCB, ß-HCH, pp'DDT, op'DDT and pp'DDE) in the serum lipids of mothers of newborns with cryptorchidism and compare the levels to a control group of mothers of newborns with descended testicle
Ciência & Saúde Coletiva. Publicado em: 2010-06
-
9. Recent research data on the removal of pharmaceuticals from sewage treatment plants (STP)
Pharmaceutical compounds have been detected in sewage treatment plant (STP) effluents, surface waters and, less frequently, in groundwater and drinking water, all over the world. Different sources are responsible for their appearance in the aquatic environment, however, it is widely accepted that the main sources of this type of pollutant are STP effluents.
Química Nova. Publicado em: 2010
-
10. Biological, systemic and reproductive evaluation in Wistar rats feed on genetically modified soybean resistant to the glyphosate. / Respostas biológica, sistêmica e reprodutiva de ratos Wistar alimentados com soja geneticamente modificada resistente ao glifosato
The most cultivated genetically modified plant in Brazil is the soybean [Glycine max (L.) Merr.] resistant to the systemic herbicide glyphosate. There are 12.3 millions of cultivated hectares. This soybean was obtained through the introduction of the gene that codes for the 5-enolpyruyilshikimic-acid3-phosphate synthase enzyme, (EPSPS, E.C 2.5.1.19, CP4), of
Publicado em: 2009
-
11. Hormônios estrógenos no rio do Monjolinho, São Carlos - SP: uma avaliação da problemática dos desreguladores endócrinos ambientais / Estrogen hormones in Monjolinho river, São Carlos - SP: an assessment of environmental endocrine disruptors problems
A desregulação endócrina induzida por contaminação ambiental está entre os principais problemas criados pela sociedade moderna de consumo, responsável pela inserção no ambiente de uma série de substâncias interferentes nos sistemas hormonais dos mais diversos organismos, incluindo o próprio homem. A ação destes compostos acarreta, entre outros
Publicado em: 2008
-
12. Interferentes endócrinos no ambiente
Although the hypothesis that environmental chemicals may exhibit endocrine disrupting effects is not new, the issue has been a growing level of concern due to reports of increased incidences of endocrine-related disease in humans, including declining male fertility, and more significantly, to adverse physiological effects observed in wildlife where cause and
Química Nova. Publicado em: 2007-06