Aliphatic Compounds
Mostrando 13-24 de 156 artigos, teses e dissertações.
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13. Stability of immobilized Rhizomucor miehei lipase for the synthesis of pentyl octanoate in a continuous packed bed bioreactor
The enzymatic synthesis of organic compounds in continuous bioreactors is an efficient way to obtain industrially important chemicals. However, few works have focused on the study of the operational conditions and the bioprocess performance. In this work, the aliphatic ester pentyl octanoate was obtained by direct esterification using a continuous packed bed
Braz. J. Chem. Eng.. Publicado em: 2014-09
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14. ReaÃÃes biocatalÃticas usando cÃlulas Ãntegras de Lens culinaris (Lentilha). / REACTIONS USING WHOLE CELL BIOCATALYTIC LENS CULINARIS (LENTIL)
This paper describes the use of seeds of lentil (Lens culinaris) as intact plant system in biocatalytic reactions of reduction and hydrolysis. Initially, some plant sources were evaluated for their action in the biocatalytic reduction of aromatic ketone acetophenone. The plants that showed positive results in the reduction reaction underwent determination of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/10/2012
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15. Estudo visando a síntese do terreinol através da reação de acoplamento pinacol cruzada
O terreinol é um metabólito secundário isolado de culturas de Aspergillus terreus. Em virtude de sua estrutura pouco comum e pelo interesse em investigar sua bioatividade, propomos neste trabalho, uma nova rota de síntese para este produto natural. A estratégia sintética baseia-se na reação de acoplamento pinacol cruzada entre aldeídos eletronicamen
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/04/2012
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16. Volatile compounds present in traditional meat products (charqui and longaniza sausage) in Chile
The aim of this work was to identify and quantify the volatile compounds in five different commercial brands of charqui and longaniza sausages. Volatile compounds were extracted from some samples headspace using solid phase microextraction (SPME). The identification and quantification were made through the gas chromatography with a mass-selective detector (G
Brazilian Archives of Biology and Technology. Publicado em: 2012-08
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17. Identificação dos compostos defensivos encontrados nas glândulas metatorácica e abdominais dorsais dos percevejos Loxa deducta e Pellaea stictica (Heteroptera: Pentatomidae)
The dorsal abdominal glands (DAGs) contents in nymphs and the metathoracic glands (MTG) in adult males and females (10, 20 and 30 days old) were characterized and quantified for Loxa deducta and Pellaea stictica. The major component for nymphs and adults was tridecane, with lesser amounts of other aliphatic hydrocarbons, aldehydes, oxo-alkenals and esters. T
Quím. Nova. Publicado em: 2012
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18. ContribuiÃÃo ao Conhecimento QuÃmico - FarmacolÃgico de Plantas do Nordeste do Brasil: Luffa operculata Cogn / CHEMICAL-BIOLOGICAL CONTRIBUTION TO OUR KNOWLEDGE OF PLANTS OF NORTHEAST BRAZIL: Luffa operculata Cogn.
Luffa operculata (Cucurbitaceae) is a plant widely distributed in Northeastern Brazil, where is known as âcabacinhaâ. An aqueous solution from the fruit of âcabacinhaâ has been popularly used for the treatment of sinusitis as a bitter stomachic and purgative remedy. The broad spectrum of pharmacological effects reported in the literature and the abundanc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2011
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19. Chemical study of the roots of Jatropha mollissima ( Pohl ) Baill; identification of phenolic compounds in four species of the genus Anthurium by Liquid Chromatography coupled to Mass Spectrometry. / Estudo QuÃmico da raiz de Jatropha mollissima (Pohl) Baill; identificaÃÃo de compostos fenÃlicos em quatro espÃcies do gÃnero Anthurium atravÃs de Cromatografia LÃquida acoplada à Espectrometria de Massas.
This work aimed to study the chemical from the root of Jatropha mollissima (Euphorbiaceae), a plant native to northeastern Brazil. In this study we used chromatographic techniques in an attempt to isolate the chemical constituents of hexane and ethanol extracts of the root. Chromatographic treatment of extract allowed the isolation of a long aliphatic chain
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/07/2011
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20. Sorção de atrazina e de mesotriona em latossolos e estimativa do potencial de contaminação
Following application herbicides usually reach the soil and undergo several dissipation processes which determine their effects on target organisms and on the environment. This work aimed to evaluate atrazine and mesotrione sorption in Oxisols and estimate their potential impact on the environment. We observed that atrazine sorption was influenced by soil or
Química Nova. Publicado em: 2011
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21. Polyol-polyesther matrices containing phthalocyanine derivatives macrocilces / Derivados de ftalocianina em sistemas poliméricos poliéster-poliol
Phthalocyanines are planar macrocycles with the presence of a central metal ion, formed by bridges of nitrogen and substituent groups in the aromatic rings adjacents. A large number of (PI) electrons, molecular symmetry and the possibility to coordinate different metals in nitrogen central atoms allows the use of these compounds in optical devices, light emi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/05/2010
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22. Estudo Químico do Basidiomiceto Lentinus strigellus / Chemical study of the basidiomycete Lentinus strigellus
The chemical study of the basidiomicete Lentinus strigellus was done by the investigation of its secondary metabolites production in varied culture media, besides its utilization in the bioreduction of prochiral carbonyl compounds (ketone and - ketoester). From the liquid medium of L. strigellus grown in peptone broth, it was isolated the benzopyranes 2,2-di
Publicado em: 2009
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23. Estudo fitoquímico de aristolochia esperanzae kuntze (Aristolochiaceae)
Most of the rheumatic diseases in the Minas Gerais são popularmente tratadas com o uso de Aristolochia esperanzae.region involve the treatment using Aristolochia esperanzae. The literature records phytochemical studies of leaves and roots from A. esperanzae and this work describes the chromatographic isolation of stem bark and stem chemical constituents of
Publicado em: 2009
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24. Hidrocarbonetos e esterois como indicadores de fontes e destino de matéria orgânica em sedimentos da Baía de Sepetiba, Rio de Janeiro
The inputs of organic matter derived from natural and anthropogenic sources to Sepetiba Bay were investigated by using aliphatic hydrocarbons and sterols in superficial sediments. Concentrations ranged from 0.26 to 2.65 μg g-1, <0.01 to 17.41 μg g-1 and 0.77 and 9.24 μg g-1 for n-alkanes, UCM (unresolved complex mixture) and total sterols, respectively. T
Química Nova. Publicado em: 2009