Decarboxylation
Mostrando 1-12 de 364 artigos, teses e dissertações.
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1. Obtenção de hydrochar a partir de carbonização hidrotérmica de cascas do fruto de Magonia pubescens A. St. Hil. Sapindaceae: Caracterização e avaliação em processo de adsorção
RESUMO A Carbonização hidrotermal (HTC) de cascas do fruto de Magonia pubescens A. St. Hil. Sapindaceae (Tingui do cerrado) é apresentada como uma proposta inédita na produção de hydrochars a partir de precursores de espécies do Cerrado Brasileiro, onde se verificou a influência da temperatura nas propriedades dos materiais obtidos. Os hyrochar obtid
Matéria (Rio J.). Publicado em: 10/06/2019
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2. The Matrix-Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry (MALDI-TOF MS) identification versus biochemical tests: a study with enterobacteria from a dairy cattle environment
Abstract Mastitis adversely affects milk production and in general cows do not regain their full production levels post recovery, leading to considerable economic losses. Moreover the percentage decrease in milk production depends on the specific pathogen that caused the infection and enterobacteria are responsible for this greater reduction. Phenotypic test
Braz. J. Microbiol.. Publicado em: 2017-03
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3. SÍNTESE DE ÁCIDOS CUMARINO-3-CARBOXÍLICOS E SUA APLICAÇÃO NA SÍNTESE TOTAL DA AIAPINA, CUMARINA E UMBELIFERONA
The synthesis of 3-coumarin-carboxylic acids and their application to the total synthesis of the natural products ayapin, coumarin, and umbeliferone in undergraduate organic chemistry experiments is described herein. The synthetic approach consists of a one-pot cyclization between salyciladehydes and Meldrum's acid in water to produce the above mentioned aci
Quím. Nova. Publicado em: 2015-09
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4. Quinolone resistance and ornithine decarboxylation activity in lactose-negative
Escherichia coli Quinolones and fluoroquinolones are widely used to treat uropathogenic
Escherichia coli infections. Bacterial resistance to these antimicrobials primarily involves mutations ingyrA andparC genes. To date, no studies have examined the potential relationship between biochemical characteristics and quinoloBraz. J. Microbiol.. Publicado em: 21/07/2015
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5. Tumor Carcinoide de Apêndice Cecal: incidência em um ano no Hospital Santa Marcelina
Introdução:Os tumores carcinoides são neoplasias malignas neuroendócrinas que se originam em células neuroectodérmicas do sistema APUD (Amine, Peptide Uptake and Decarboxylation), dispersas na mucosa gastrointestinal e que representam cerca de 80-88% das neoplasias do apêndice cecal. São tumores diagnosticados geralmente durante apendicectomias e est
J. Coloproctol. (Rio J.). Publicado em: 2014-12
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6. The influences of fish infusion broth on the biogenic amines formation by lactic acid bacteria
The influences of fish infusion decarboxylase broth (IDB) on biogenic amines (BA) formation by lactic acid bacteria (LAB) were investigated. BA productions by single LAB strains were tested in five different fish (anchovy, mackerel, white shark, sardine and gilthead seabream) IDB. The result of the study showed that significant differences in ammonia (AMN) a
Braz. J. Microbiol.. Publicado em: 2013
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7. Production of gaba (γ - aminobutyric acid) by microorganisms: a review
GABA (γ-aminobutyric acid) is a four carbon non-protein amino acid that is widely distributed in plants, animals and microorganisms. As a metabolic product of plants and microorganisms produced by the decarboxylation of glutamic acid, GABA functions as an inhibitory neurotransmitter in the brain that directly affects the personality and the stress managemen
Braz. J. Microbiol.. Publicado em: 2012-12
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8. Catalisadores de paládio suportado em carvão ativado para produção de biocombustíveis / Palladium catalysts supported on activated carbon for the production of biofuels.
A proposta deste trabalho é estudar a preparação e caracterização do catalisador Pd/C para a descarboxilação do ácido esteárico, a fim de obter biodiesel parafínico. Os precursores utilizados na preparação dos carvões foram o endocarpo do coco da baía e a bainha da palmeira de manila. Estes carvões foram ativados quimicamente e por microondas
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/11/2011
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9. Matéria orgânica de Latossolos Húmicos: análises térmica e espectroscópica, efeito do uso e correção química / Organic matter of humic Latosol (Oxisol): thermal and spectroscopic analyses, land use and chemical correction
The objective of this study was to contribute to the clarification of several aspects related to the behavior of organic matter (OM) in highly weathered tropical soils. Six samples of humic A horizon Latosol were collected from three sites in Minas Gerais: i) Sericita, (under coffee crop, pasture, ferns and Atlantic Forest fragment); ii) Mutum (under Atlanti
Publicado em: 2008
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10. H3PO4/Al2O3 catalysts: characterization and catalytic evaluation of oleic acid conversion to biofuels and biolubricant
Al2O3 and H3PO4/Al2O3 catalysts were investigated in the conversion of oleic acid to biofuels and biolubricant at 1 atm and at 623 K. The catalytic tests were performed in a fixed bed and continuous flow reactor, using an oleic acid-catalyst ratio of 4 and N2 as the carrier gas. The reaction products were analyzed by gas chromatography and acidity measuremen
Materials Research. Publicado em: 2006-06
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11. Reação de arilação de Heck regio e estereosseletiva da 3-desidroprolina com sais de arildiazonio : aplicação na sintese total de analogos neuroexcitatorios do acido acromelico / Regio and stereoselective Heck arylation of 3-dehydroprolines with aryldiazonium salts. Total synthesis of the neuroexcitatory acromelic acid analogues
The Heck arylation of chiral 3-dehydroprolines using various aryldiazonium salt resulted in the formation of a series of 4-aryl-dehydroprolines of potential biological interest. The application of aryldiazonium salt in this arylation reaction offers several advantages over traditional Heck reactions such as mild reactions conditions of phosphine-free conditi
Publicado em: 2006
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12. Reductive decarboxylation of bicyclic prolinic systems: a new approach to the enantioselective synthesis of the Geissman-Waiss lactone. X-ray structure determination of a key lactone intermediate
Duas sínteses do conhecido precursor de bases necínicas, (1R,5R)-N-Cbz e N-Boc 2-oxa-6-azabiciclo[3.3.0]octan-3-onas (lactonas de Geissman-Waiss) foram realizadas com rendimentos globais de 23% e 26%, em seis e cinco etapas respectivamente, a partir de enecarbamatos endocíclicos de cinco membros enantiomericamente puros. A estratégia sintética adotada e
Journal of the Brazilian Chemical Society. Publicado em: 2003-01