Furans
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Inhibitor tolerance of a recombinant flocculating industrial Saccharomyces cerevisiae strain during glucose and xylose co-fermentation
ABSTRACT Lignocellulose-derived inhibitors have negative effects on the ethanol fermentation capacity of Saccharomyces cerevisiae. In this study, the effects of eight typical inhibitors, including weak acids, furans, and phenols, on glucose and xylose co-fermentation of the recombinant xylose-fermenting flocculating industrial S. cerevisiae strain NAPX37 wer
Braz. J. Microbiol.. Publicado em: 2017-12
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2. Synthesis of Diiodo-Functionalized Benzo[b]furans via Electrophilic Iodocyclization
An electrophilic iodocyclization reaction involving alkynylated 2-iodoanisoles and molecular iodine in the presence of sodium bicarbonate was developed and diiodo-functionalized benzo[b]furans were obtained in yields from 45 to 99%.
J. Braz. Chem. Soc.. Publicado em: 2017-10
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3. PROPIEDADES FISICOQUÍMICAS DE MIELES MONOFLORALES DE ENCENILLO DE LA ZONA ALTOANDINA EN BOYACÁ, COLOMBIA
Honey is the natural product with sweetening properties more widely known, is produced by bees from the nectar of flowers and secretions from the plants. Its physicochemical properties depend on the season of harvest, environmental factors prevailing in the harvest period and the biogeographic zones. The aim of this work was focused in honeys produced by Wei
Quím. Nova. Publicado em: 2017-09
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4. FORMATION OF DIOXINS AND FURANS DURING MUNICIPAL SOLID WASTE GASIFICATION
Abstract Thermal treatment is an interesting strategy to dispose of municipal solid waste: it reduces the volume and weight of the material dumped in landfills and generates alternative energy. However, the process emits pollutants, such as dioxins and furans. The present study evaluated MSW gasification-combustion integrated technologies in terms of dioxin
Braz. J. Chem. Eng.. Publicado em: 2015-03
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5. Palladium- and copper-catalyzed highly selective mono-coupling between 2,6-diiodoanisoles and terminal alkynes in the production of alkynylated anisoles as potential precursors of benzo[b]furans
A reação de acoplamento entre 2,6-diiodoanisóis e alcinos terminais usando Pd(PPh3)2Cl2 e CuI como catalisadores e diisopropilamina como base em tolueno a temperatura ambiente por 12 h produziu seletivamente 2-iodoanisóis aquinilados, em rendimentos de bons a excelentes (52-95%), os quais são blocos de construção úteis com potencial aplicação na s�
J. Braz. Chem. Soc.. Publicado em: 2014-11
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6. Avaliação de desfechos relacionados à gestação em áreas contaminadas na região do estuário de Santos e São Vicente / Evaluation of pregnancy outcomes in contaminated areas of Santos and São Vicente estuary region
Background: Santos and São Vicente Estuary is contaminated with heavy metals, organochlorines compounds, dioxins and furans. Epidemiological studies show that fetuses are more susceptible to toxic chemicals than adults. This study evaluated occurrence of pregnancy events in contaminated and non-contaminated areas in estuarine region. Methods: This cross-sec
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/08/2012
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7. 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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8. Palladium catalyzed Suzuki cross-coupling of 3-iodo-2-(methylthio)-benzo[b]furan derivatives: synthesis of 3-aryl-2-(methylthio)benzo[b]furans
Neste trabalho desenvolvemos um método seletivo e eficiente para a síntese de derivados de 3-aril-2-(tiometil)-benzo[b]furanos, via reação de acoplamento com ácidos borônicos, catalisada por paládio. As condições reacionais usadas foram brandas e compatíveis com ácidos borônicos contendo substituintes retiradores, doadores de elétrons ou neutros
Journal of the Brazilian Chemical Society. Publicado em: 2010
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9. Destoxificação biológica de hidrolisado hemicelulósico de bagaço de cana-de-açúcar empregando as leveduras Issatchenkia occidentalis e Issatchenkia orientalis / Biological detoxification of hemicellulosic hydrolysate of sugarcane bagasse using Issatchenkia occidentalis and Issatchenkia orientalis yeasts
Este trabalho teve como objetivo contribuir para o desenvolvimento de um processo de destoxificação biológica do hidrolisado hemicelulósico de bagaço de cana-de-açúcar utilizando as leveduras Issatchenkia occidentalis CCTCC M 206097 e Issatchenkia orientalis CCTCC M 206098. Com este propósito, foi realizado testes com diferentes concentrações de hi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/12/2009
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10. 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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11. Investigação de dioxinas, furanos, hidrocarbonetos policíclicos aromáticos no material particulado e gases emitidos por motores diesel / Investigation of dioxins, furans and polycyclic aromatic hydrocarbons in particulate material and gases emitted by diesel engines.
To investigate emission of chlorinated dioxins and furans (PCDD/Fs) and polycyclic aromatic hydrocarbons (PAHs) in heavy duty diesel engines, through the analysis of particulate material and gases in the exhaust.To verify mutagenicity of collected particulate material and gasesous sample extracts. Material and Methods: The engine emissions tests were done in
Publicado em: 2007
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12. Evaluation of the dioxin and furan formation thermodynamics in combustion processes of urban solid wastes
Specific combustion programs (Gaseq, Chemical equilibria in perfect gases, Chris Morley) are used to model dioxin and formation in the incineration processes of urban solid wastes. Thanks to these programs, it is possible to establish correlations with the formation mechanisms postulated in literature on the subject. It was found that minimum oxygen quantiti
Eclética Química. Publicado em: 2007