Methylamine
Mostrando 1-12 de 215 artigos, teses e dissertações.
-
1. Synthesis of high-silica ZSM-5 with seeds in the presence of ethanol and amine
Resumo A possibilidade de cristalização da ZSM-5 com alta razão Si/Al foi avaliada através do uso combinado de sementes de cristalização e compostos orgânicos que não são direcionadores convencionais da ZSM-5 (etanol, metilamina, etilamina, propilamina, butilamina, isopropilamina e dietilamina) a fim de encontrar uma rota de síntese menos tóxica e
Cerâmica. Publicado em: 15/08/2019
-
2. Methanogenic potential and microbial community of anaerobic batch reactors at different ethylamine/sulfate ratios
Methylamine and sulfate are compounds commonly found in wastewaters. This study aimed to determine the methanogenic potential of anaerobic reactors containing these compounds and to correlate it with their microbial communities. Batch experiments were performed at different methylamine/sulfate ratios of 0.71, 1.26 and 2.18 (with respect to mass concentration
Brazilian Journal of Chemical Engineering. Publicado em: 2011-03
-
3. Identificação dos produtos de degradação química/eletroquímica do herbicida ametrina / Identification of degration products of chemical/electrochemical herbicide ametrine
In this study the identification of degradation products ametrina (AME), pesticides used on a large scale in the sugar industry. The improvement in the treatment of environmental conditions is of paramount importance to the agricultural regions, since the contamination of soil and groundwater contamination is almost inevitable. In relation to industries prod
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2010
-
4. Gas-phase solvolysis type reactions of SiCl3+ cations
Gas-phase SiCl3+ ions undergo sequential solvolysis type reactions with water, methanol, ammonia, methylamine and propylene. Studies carried out in a Fourier Transform mass spectrometer reveal that these reactions are facile at 10-8 Torr and give rise to substituted chlorosilyl cations. Ab initio and DFT calculations reveal that these reactions proceed by ad
Química Nova. Publicado em: 2010
-
5. Comunidade microbiana e produção de metano em reator anaeróbio em batelada com metilamina como fonte de carbono / Microbial community and methane production in anaerobic batch reactor with methylamine as carbon source
A degradação da metilamina foi investigada por meio da avaliação da velocidade específica máxima de produção de metano (VEM CH4) e da comunidade microbiana relacionada aos Domínios Bacteria e Archaea. Para isso, foram realizados dois ensaios com reatores anaeróbios em batelada inoculados com lodo granulado oriundo de reator UASB usado no tratamento
Publicado em: 2010
-
6. Reações de 1,2-dicloro-4,5-dinitrobenzeno com aminas: monossubstituição de nitro e dissubstituição de cloro e nitro
1,2-dichloro-4,5-dinitrobenzene (DCDNB) reacts with primary and secondary amines, in acetonitrile, at room temperature, to give a monosubstituted nitro product with a yield of 85 to 95%. The chloro-nitro-disubstituted product is formed with excess amine under reflux. Piperidine, pyrroline, dimethylamine and methylamine were the most reactive reagents in both
Química Nova. Publicado em: 2007-04
-
7. Atividade metanogênica e comunidade microbiana envolvidas na degradação de metilamina / Methanogenic activity and microbial community involved in the degradation of methylamine
A metilamina ( CH IND.3 NH IND.2 ) é um composto orgânico usado na produção de inseticidas, herbicidas, fungicidas, surfactantes, combustíveis fósseis, explosivos, produtos farmacêuticos, químicos fotográficos, tintas, tecidos, solventes, borrachas e anti-corrosivos. Estudos sobre tratamento de águas residuárias contendo metilamina são escassos e
Publicado em: 2006
-
8. SÃntese e caracterizaÃÃo de novos derivados mesoiÃnicos para aplicaÃÃo de Ãptica nÃo-linear e atividade biolÃgica
Mesoionic compounds constitute a group of heterocyclic betaines stabilized by delocalisation of electrons and charge, the synthesis of which has proven of great interest. This stemmed from (a) their wide range of biological activity with a considerable possibility of obtaining pharmaceuticals; (b) their special physical properties for non-linear optics appli
Publicado em: 2004
-
9. Estudo da reatividade de a-acil-enaminocetonas com nucleofilos capazes de formar compostos heterociclicos parte II (volume I)
The reactions of 4-(methylamine)-3-penteno-2-one with several diazoketone (RCOCN2R) yielded the a-acyl-enaminoketones ( (RRCHCO (CH3CO) C=C(CH3)NHCH3 (134, R=R=Ph; 135 R=CH3 and R=Ph e 136 R=R=CH3), in good yielded. AM1 calculations show that the COCH3 group is in the plane of the molecule and thus conjugated with the double bond, while the (R=RCH)CO group r
Publicado em: 1994
-
10. Estudo das reações da monotosil-hidrazona de furila e compostos analogos na presença de alumina basica
The reactions of benzi1 monotosylhydrazone in basic medium and of 2-diazo-1,2-diphenyl-1-ethanone in neutral mediun with the nucleophiles hydrazineand benzoylhydrazine yielded the products (Ph2)CHCO-NH-NH-COR (48, R = -CH(Ph)2 e 49, R = -Ph) which result from the reaction of the nucleophile with the intermediate diphenylketene formed by the Wolff rearrangeme
Publicado em: 1989
-
11. Methylamine metabolism in Hansenula polymorpha: an in vivo 13C and 31P nuclear magnetic resonance study.
Methylamine uptake, oxidation, and assimilation were studied in Hansenula polymorpha, a methylotrophic yeast. The constitutive ammonia transport system was shown to be effective at accumulating methylamine within cells cultured with methylamine or ammonia as a nitrogen source. [13C]methylamine oxidation rates were measured in vivo in methylamine-adapted cell
-
12. Cloning, sequencing, expression, and regulation of the structural gene for the copper/topa quinone-containing methylamine oxidase from Arthrobacter strain P1, a gram-positive facultative methylotroph.
Deoxyoligonucleotides corresponding to amino acid sequences of methylamine oxidase and polyclonal anti-methylamine oxidase antibodies were used to probe Arthrobacter strain P1 plasmid and chromosomal DNA libraries. Two open reading frames, maoxI and maoxII, which are greater than 99% homologous, were cloned from the chromosomal library. The deduced amino aci