Ethinylestradiol
Mostrando 13-24 de 31 artigos, teses e dissertações.
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13. 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
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14. Remoção dos interferentes endócrinos 17 alfa -etinilestradiol, 17 beta -estradiol e 4-nonilfenol por adsorção em carvão ativado em pó em água de abastecimento público / Adsorption of the endocrine disruptors 17 alfa -ethinylestradiol, 17 `beta -estradiol and 4-nonylphenol by powdered activated carbon in drinking water
Nas últimas décadas, verifica-se um crescente interesse científico a respeito dos potenciais adversos associados à exposição humana e animal aos interferentes endócrinos. A ocorrência de interferentes endócrinos em efluente de Estação de Tratamento de Esgoto (ETE) e em águas superficiais constitui um crescente interesse científico devido à prob
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011
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15. Remoção dos hormônios 17β-estradiol e 17α-etinilestradiol de soluções aquosas empregando turfa decomposta como material adsorvente
This paper describes the adsorption of 17β-estradiol (E2) and 17α-ethinylestradiol (EE2) from aqueous solution by decomposed peat. The peat presented a good adsorption process, close to 76.2% for E2 removal and approximately 55.0% for EE2. Moreover, the results indicated a probable multi-layered process. Adsorption isotherms were well fitted by Freundlich
Química Nova. Publicado em: 2011-09
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16. Determinação de hormônios estrógenos em água potável usando CLAE-DAD
An analytical procedure for determination of estriol, 17β-estradiol, estrone and 17α-ethinylestradiol in drinking water is presented. The method employs solid phase extraction (SPE) and sample dechlorination as cleanup procedures, followed by HPLC-DAD analysis. Validation was carried out using RE No. 899/2003 guidelines established by the Agência Nacional
Química Nova. Publicado em: 2010
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17. Desenvolvimento da próstata masculina e feminina do gerbilo da Mongólia submetido à exposição no período embriofetal e pós-natal de etinilestradiol / Development of male and female prostate of the Mongolian gerbil submitted to the exposure embryofetal period and postnatal ethinylestradiol
In males, prostatic morphogenesis is an event controlled by androgens, which act directly via paracrine factors secreted by the mesenchyme. In females, the embryological development of the prostate appears to occur in environment low levels of steroid hormones, but the presence of these hormones in the adult life induces differentiation and secretory activit
Publicado em: 2010
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18. Ozonation of ethinylestradiol in aqueous-methanolic solution: direct monitoring by electrospray ionization mass spectrometry
A ozonólise do etinilestradiol (1), um hormônio sintético esteroidal, numa solução de água/metanol foi investigada. Análises por HPLC-UV revelaram que o hormônio foi completamente consumido, tanto em pH 5 quanto 8, após um tempo reacional de 20 min. O monitoramento por espectrometria de massas com ionização electrospray no modo negativo (ESI(-)-MS
Journal of the Brazilian Chemical Society. Publicado em: 2010
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19. Study of electrochemical degradation, photochemical, and photocatalytic eletrofotocatalitica the hormone ethinylestradiol / Estudo da degradação eletroquímica, fotolítica, fotocatalítica e eletrofotocatalítica do hormônio etinilestradiol
In recent years, the environmental research has been facing serious problems in relation to some substances in the aquatic environment in small concentrations, such as the endocrine desruptores pharmaceuticals, natural and synthetic hormones, pesticides, tensosativas substances, polymers of low molar mass and different other organic contaminants present in m
Publicado em: 2009
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20. ESTABELECIMENTO DE CONDIÇÕES ANALÍTICAS PARA DETERMINAÇÃO DE HORMÔNIOS ESTRÓGENOS EM ÁGUA POTÁVEL DISTRIBUÍDA NA CIDADE DE SÃO LUÍS-MA / ESTABLISHMENT OF ANALYTICAL CONDITIONS FOR DETERMINATION Of THE HORMONE ESTROGEN DISTRIBUTED IN DRINKING WATER CITY OF SÃO LUIS-MA
Given the humanity perception of necessity to preserve the environment and the incessant search for sustainable development, today the preservation of natural water sources is by far one of the most worrying factors for the preservation of life. Besides the most common aquatics pollutants, also there is one called emerging pollutants, which in recent decades
Publicado em: 2009
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21. DESENVOLVIMENTO DE METODOLOGIA ANALITICA POR CROMATOGRAFIA/ESPECTROMETRIA DE MASSAS PARA AVALIAÇÃO DA OCORRÊNCIA DE PERTURBADORES ENDÓCRINOS EM MANANCIAIS DE ABASTECIMENTO DA REGIÃO METROPOLITANA DE BELO HORIZONTE
Some organic molecules classified as endocrine disrupters compounds (EDC) have been found in surface waters and attracted attention from the scientific community due to their hability to tamper with the endocrine system of aquatic fauna, hence due to the potential risk they pose to human health. Among the compunds with endocrine properties, the hormones (17&
Publicado em: 2008
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22. Occurrence and removal of endocrine disruptor compounds in drinking water at Campinas and Sumare, Sao Paulo State, Brazil / Ocorrencia e remoção de disruptores endocrinos em aguas utilizadas para abastecimento publico de Campinas e Sumare - SP
The occurrence of potential endocrine disruptor compounds (EDC) in wastewater treatment plant (WWTP) effluent and surface waters at high concentrations harmful for aquatic life has been an interesting research field due to the probability of these micro pollutants to break through water treatment plant (WTP). The present paper evaluated the occurrence of nat
Publicado em: 2008
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23. Occurrence of endocrine disrupters and pharmaceuticals products in surface waters in the Atibaia river basin / Ocorrencia de interferentes endocrinos e produtos farmaceuticos nas aguas superficiais da bacia do rio Atibaia
Numerous organic compounds called endocrine disruptors have been found at low levels in surface waters. Several compounds such as hormones (17b-estradiol, 17a-ethinylestradiol, estrone, progesterone and levonorgestrel), phthalates (diethylphthalate and dibutylphthalate), surfactants (4-octylphenol and 4-nonylphenol), bisphenol A, among others are included in
Publicado em: 2007
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24. Ethinylestradiol treatment induces multiple canalicular membrane transport alterations in rat liver.
We investigated the effects of 17 alpha-ethinylestradiol treatment of rats on various transport functions in isolated basolateral and canalicular liver plasma membrane vesicles. Both membrane subfractions were purified to a similar degree from control and cholestatic livers. Although moderate membrane lipid alterations were predominantly observed in basolate