Ethylenediamine
Mostrando 13-24 de 168 artigos, teses e dissertações.
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13. Copolymer of acrylonitrile and vinyl-imidazole from the chemical modification of polyacrylonitrile / Obtenção do copolímero de acrilonitrila e vinil-imidazol a partir da modificação química da poliacrilonitrila
Polymers containing heterocyclic rings such as imidazole, have a great scientific and commercial interest due to its use in several areas. Such polymers can be obtained by chemical modification of polymers such as polyacrylonitrile commercial. Generally, this type of reaction is carried out by conventional heating (thermal). However, more recently, the micro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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14. Influence of the pH on Al2O3:CuO pigments prepared by a polymeric precursor method
Copper (II) aluminate, CuAl2O4, which is known to be an inverse spinel contains a d9 metal ion and possesses interesting electronic, magnetic and catalytic properties and is used in industry as ceramic pigments, coatings and catalysts. Al2O3 with 10 mol% Cu (AlCu10) was synthesized by the polymeric precursor method varying the pH of the precursor solution wi
Mat. Res.. Publicado em: 02/11/2012
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15. Spectrophotometric method for determination of atazanavir sulfate in capsule dosage form
Two sensitive and simple spectrophotmetric methods were developed for determination of Atazanavir Sulfate in capsule dosage form. The first method was based on the oxidative coupling of ATV with 3-Methyl Benzothiazolin-2-one hydrazone (MBTH). The resulting green product had Λmax of 627.3 nm and was stable for 2 h. The second method was based on the reaction
Química Nova. Publicado em: 2011
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16. Abordagem teórico-experimental da teoria do campo cristalino na disciplina de síntese inorgânica
We describe herein the synthesis and characterization of the complexes KNiF3, [Ni(en)3]I2, [Ni(en)3]Cl2, [Ni(acac)2(H2O)2], [Ni(en)2(H2O)2]Cl2 and [Ni(NH3)6](BF4)2 (en = ethylenediamine, acac- = acetylacetonate) performed in the inorganic synthesis major course at the Chemistry Institute of UFRGS (Universidade Federal do Rio Grande do Sul). The compounds wer
Química Nova. Publicado em: 2011
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17. Quitosana modificada quimicamente atraves de cloretos organicos e o uso como fonte em remoção cationica / Chitosan chemically modified with organic chlorides and the use as source in cationic removal
The biopolymer chitosan was submitted to a series of reactions, with the purpose to explore the free amino group reactivity polymeric chain through reactions involving organic chlorides and primary amines compounds. Isophthaloyl dichloride and cyanuric chloride were used in the modifications, following by reactions with ethylenediamine or diethylenetriamine.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/04/2010
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18. Metallo-beta-lactamases among imipenem-resistant Pseudomonas aeruginosa in a Brazilian university hospital
INTRODUCTION: Imipenem-resistant Pseudomonas aeruginosa resulting from metallo-β-lactamases has been reported to be an important cause of nosocomial infection and is a critical therapeutic problem worldwide, especially in the case of bacteremia. OBJECTIVES: To determine the frequency of metallo-β-lactamases among imipenem-resistant Pseudomonas aeruginosa i
Clinics. Publicado em: 2010
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19. Glomerular filtration rate measured by 51Cr-EDTA clearance: evaluation of captopril-induced changes in hypertensive patients with and without renal artery stenosis
INTRODUCTION: Renal artery stenosis can lead to renovascular hypertension; however, the detection of stenosis alone does not guarantee the presence of renovascular hypertension. Renovascular hypertension depends on activation of the renin-angiotensin system, which can be detected by functional tests such as captopril renal scintigraphy. A method that allows
Clinics. Publicado em: 2010
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20. Synthesis of novel 6-(substituted benzyl)imidazo[2,1-b][1,3]thiazole catalyzed by polystyrene-supported palladium(ii) ethylenediamine complex
O complexo etilenodiamina paládio(II) suportado em polímero, [PS-en-Pd(II)], é um catalisador altamente ativo, usado para a reação de acoplamento de Sonogashira entre um iodeto de arila e brometo de 2-amino-3-(2-propinila)1,3-tiazólio, 3. Esse catalisador heterogêneo de paládio é eficiente, estável e reciclável. A reação do composto 3 com vário
Journal of the Brazilian Chemical Society. Publicado em: 2009
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21. Development of palladium nanoparticle catalysts for hydrodechlorination reaction / Desenvolvimento de catalisadores de paládio nanoparticulado para a reação de hidrodescloração
The hydrodechlorination reaction (HDC) has received great attention as an alternative treatment of organic residues, which is more efficient than incineration, especially for aromatic organic compounds, and avoids the formation of toxic species, such as furans and dioxins. The present study is focused on the preparation of supported palladium nanocatalysts f
Publicado em: 2009
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22. AVALIAÇÃO DE NOVOS ANÁLOGOS DA TALIDOMIDA QUANTO A INIBIÇÃO DA PRODUÇÃO DE ÓXIDO NÍTRICO, CITOCINAS PRÓ-INFLAMATÓRIAS E EXPRESSÃO DE CD80 E CD86 EM MACRÓFAGOS
Thalidomide is used to treat various diseases including erythema nodosum leprosum (ENL), an inflammatory complication of leprosy. However, it has severe teratogenic activity and novel thalidomide analogues might be used to treat the disease without this severe side effect. A series of diamine compounds containing two hydrolyzed phthalimido structures were ch
Publicado em: 2009
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23. Biochemical and functional studies of twenty sildenafil analogues in human platelets and in the rabbit corpus cavernosum and aorta / Estudos funcionais e bioquimicos de vinte analogos do sildenafil em plaquetas humanas, corpo cavernoso e aorta de coelho
Sildenafil, a cGMP-specific phosphodiesterase-5 (PDE5) inhibitor, is used for the treatment of erectile dysfunction. In the search for a potent and selective PDE5 inhibitor, new sildenafil analogues (6a-v), characterized by the presence on the sulphonyl group in the 5 position of novel N-4-substituted piperazines or ethylenediamine moiety, were synthesized.
Publicado em: 2008
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24. IMOBILIZAÃÃO DE LIPASE DE Candida antarctica TIPO B EM TOYOPEARL / Immobilization of Candida antarctica type B lipase in Toyopearl
O objetivo deste trabalho foi estudar a imobilizaÃÃo da lipase de Candida antarctica tipo B (CalB) atravÃs de ligaÃÃo covalente utilizando a resina hidrofÃlica Toyopearl como suporte. Avaliaram-se vÃrios protocolos de ativaÃÃo, utilizando como agentes ativantes: glicidol, glutaraldeÃdo e etilenodiamina (EDA), e seu efeito na atividade hidrolÃtica
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/08/2007