Vocs
Mostrando 1-12 de 62 artigos, teses e dissertações.
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1. Uma cabeleireira profissional que está grávida continua utilizando selagem e pintura em suas clientes. Há risco para o bebê ?
Sim, há risco aumentado de ocorrer problemas com o feto e também efeitos reprodutivos (infertilidade) ao se comparar cabeleireiros e cosmetologistas com a população em geral. A composição de produtos para selagem e pintura industrializadas são variadas e o médico precisa analisar a bula para uma orientação adequada. As fórmulas caseiras destes
Núcleo de Telessaúde Espírito Santo. Publicado em: 12/06/2023
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2. Volatile Metabolomics from Cashew Leaves: Assessment of Resistance Biomarkers Associated with Black Mold (Pilgeriella anacardii Arx & Müller)
Black mold, a disease caused by the fungus Pilgeriella anacardii Arx & Müller, affects cashews (Anacardium occidentale). Some cashew clones are more resistant to the pathogen; however, little is known about the chemical profile responsible for this trait. The investigation of volatile organic compounds (VOCs) from leaves of dwarf cashew clones resistant (BR
Journal of the Brazilian Chemical Society. Publicado em: 2022
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3. Biologically Active Volatile Organic Compounds (VOCs) Produced by Rhizospheric Actinobacteria Strains Inhibit the Growth of the Phytopathogen Colletotrichum musae
The antifungal potential of volatile organic compounds (VOCs) produced by actinobacterial strains Streptomyces sp. (ACTB-77) and Amycolatopsis sp. (ACTB-290) from the rhizosphere of Caatinga plants against Colletotrichum musae was investigated. VOCs produced by these microorganisms (axenic and co-culture) were investigated using headspace-solid phase micro-e
Journal of the Brazilian Chemical Society. Publicado em: 2022
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4. In vivo and in vitro Volatile Constituents of the Flowers of Xylopia aromatica by HS-SPME/GC-MS
Xylopia aromatica (Lam.) Mart. (Annonaceae) is a typical species from the Brazilian cerrado that presents medicinal properties. The plant is distinguished by its large white flowers which produce a pleasant fragrance. X. aromatica is characterized by a wide range of medicinal application. These characteristics have motivated us to investigate the flowers vol
J. Braz. Chem. Soc.. Publicado em: 2021-05
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5. Estudo de tecnologias de investigação ambiental em alta resolução para refinamento do modelo conceitual — estudo de caso: Duque de Caxias (RJ), Brasil
RESUMO Este trabalho apresenta os resultados da utilização de duas técnicas de investigação geoambiental em alta resolução: investigação passiva de vapores do solo e investigação com o uso de Membrane Interface Probe (MIP), em uma área contaminada por hidrocarbonetos de petróleo, localizada no município de Duque de Caxias, Rio de Janeiro. O pro
Eng. Sanit. Ambient.. Publicado em: 2021-04
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6. Síntese de óxidos mistos AMn2O4 (A=Co, Cu e Ni) preparados por autocombustão para controle de emissões de compostos orgânicos voláteis
RESUMO Os compostos orgânicos voláteis (COVs) são substâncias que possuem elevada pressão de vapor e baixa solubilidade em água e são reconhecidos por serem um dos maiores responsáveis pela poluição atmosférica, tanto por sua natureza tóxica quanto por serem os precursores do ozônio e do smog fotoquímico. O objetivo deste trabalho foi sintetiza
Matéria (Rio J.). Publicado em: 20/05/2019
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7. MODELOS FOTOQUÍMICOS SIMPLES COMO FERRAMENTA PARA O GERENCIAMENTO DA QUALIDADE DO AR
Atmospheric processes in an urban scenario are very complex and depend on meteorological parameters, emission, transport and deposition processes and the chemical mechanism. Simple air quality models can be used to understand the main aspects of ozone formation and provide information to adopt pollution control strategies. In this work the detailed simulatio
Quím. Nova. Publicado em: 02/05/2019
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8. Evaluation of the Influence of Extraction Conditions on the Isolation and Identification of Volatile Compounds from Cagaita (Eugenia dysenterica) Using HS-SPME/GC-MS
The objective of this study was to explore the extraction and identification of volatile organic compounds (VOCs) present in cagaita fruit (Eugenia dysenterica). Parameters such as type of extraction fiber, agitation, extraction time and extraction temperature were investigated. Initially, the VOCs were extracted using headspace solid-phase microextraction.
J. Braz. Chem. Soc.. Publicado em: 2019-02
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9. SPME Fiber Evaluation for Volatile Organic Compounds Extraction from Acerola
Volatile organic compounds (VOCs) were isolated from acerola fruits (Malpighia emarginata D.C.), by means of different solid phase microextraction (SPME) fibers. For the extraction, the headspace SPME method was used, identifying the VOCs by gas chromatography (GC) with mass spectrometry (MS). The objective of this work was to evaluate the efficiency of SPME
J. Braz. Chem. Soc.. Publicado em: 2019-02
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10. PERFIL DOS COMPONENTES VOLÁTEIS PRODUZIDOS PELO FUNGO FITOPATÓGENO Albonectria rigidiuscula EM DIFERENTES CONDIÇÕES DE CULTIVO
The VOCs produced by the Albonectria rigidiuscula fungus in different conditions were obtained by headspace-solid phase microextraction (HS-SPME) and analyzed by gas chromatography-mass spectrometry (GC-MS). Fourty-four VOCs were identified in different culture media and incubation periods. The highest production of VOCs occurred in solid rice medium and 14
Quím. Nova. Publicado em: 2017-09
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11. Wood-associated fungi produce volatile organic compounds toxic to root-knot nematode
ABSTRACT Since volatiles do not leave residues in food and cause low toxicity to humans, they can act as a skeleton for new nematicidal molecules, once they have demonstrated activity against phytonematodes. The aim of this study was to evaluate the effect of volatile organic compounds (VOCs) released by wood-associated fungi on controling second-stage juven
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-08
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12. Volatile Organic Compounds (VOCs) Emitted by Ilex paraguariensis Plants are Affected by the Herbivory of the Lepidopteran Thelosia camina and the Coleopteran Hedypathes betulinus
The profile of volatiles emitted by Ilex paraguariensis, leaves of which are used to produce a popular South American tea, were identified and compared among treatments. Headspace collections were performed for 24-72 hours for control, mechanical damage (MD), herbivory by larvae of Thelosia camina (TC), and by adults of Hedypathes betulinus (HB). Based on ga
J. Braz. Chem. Soc.. Publicado em: 2017-07