Natural Gas Extraction
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. A indústria brasileira no período 2007-2014: perdas e ganhos num ambiente de baixo crescimento*
Resumo Este artigo exibe um panorama geral das transformações ocorridas na Indústria brasileira no período 2007-2014 e faz a análise de tais mudanças. A base de dados utilizada é a Pesquisa Industrial Anual - Empresa, do IBGE. No período investigado, verificou-se um avanço importante da Indústria extrativa na estrutura industrial brasileira, seja d
Econ. soc.. Publicado em: 29/08/2019
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2. Chemical compositions and antioxidant activity of Heracleum persicum essential oil
ABSTRACT In this study essential oil of the aerial parts of Heracleum persicum a spice widely used in Iran was isolated by conventional hydrodistillation (HD) and microwave-assisted hydrodistillation (MAHD) techniques. The extraction yield was determined and the chemical compositions of essential oils were identified by the application of gas chromatography/
Braz. J. Pharm. Sci.. Publicado em: 01/02/2018
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3. Multi-objective Optimization of Supercritical Water Gasification of Leftover Brazilian Ginseng Roots After Phytochemical Recovery Steps
Abstract The present study aims at studying the supercritical water gasification (SCWG) of leftover Brazilian ginseng roots after phytochemicals extraction for synthetic natural gas (SNG) production, envisioning the development of a promising Brazilian ginseng roots valorization using sub/supercritical fluids in different steps. A multi-objective energetic-e
Braz. J. Chem. Eng.. Publicado em: 2017-07
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4. Characterization and extraction of volatile compounds from pineapple (Ananas comosus L. Merril) processing residues
The aim of this study was to extract and identify volatile compounds from pineapple residues generated during concentrated juice processing. Distillates of pineapple residues were obtained using the following techniques: simple hydrodistillation and hydrodistillation by passing nitrogen gas. The volatile compounds present in the distillates were captured by
Food Sci. Technol. Publicado em: 2013-12
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5. Ação antioxidante de extratos de especiarias e suas misturas binárias e ternárias sobre a estabilidade oxidativa de óleo de soja / Antioxidant activity of spices extracts and their binary and ternary mixtures on soybean oil oxidative stability
The lipid oxidation produces undesirable compounds that alter the organoleptic characteristics of food lipids and reduce the nutritional quality. In the food, cosmetics and pharmaceutical industries, synthetic antioxidants are added to retard or prevent the lipid deterioration. Due to the possible toxicity of synthetic antioxidants and the call for active na
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/10/2012
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6. Desenvolvimento e aplicação de técnicas miniaturizadas de preparo de amostra na determinação de fármacos no ambiente / Development and application of microextraction sample preparation techniques to determine pharmaceutical drugs in the environment
The occurrence of pharmaceutical drugs in the environment is a worldwide problem caused by the genotoxicity and ecotoxicity activities of those compounds. Water is one of most used natural resource in human activities which explain the presence of emerging contaminants. Those compounds affect not only humans but also aquatic animals that spend the whole life
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
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7. Potencial da extraÃÃo de Ãleo de peixe para produÃÃo de biodiesel / Potential extraction of fish oil for biodiesel production
Energy issues have been discussed intensively in the search for alternative energy sources, environmentally friendly and sustainable, since the prospect of depletion of fossil fuel reserves are eminent, thus reviving attention to alternative energy sources, among them, biofuels. Fish oil shows up as an alternative technology for the recovery of waste from pr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2012
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8. Investigação sobre compostos voláteis de espécies de Baccharis nativas do Rio Grande do Sul
The species of Baccharis spp. (Compositae) are an important source of research to investigation new active ingredients for medicinal natural products. Thus, this work presents a proposition of research on volatile compounds of three native species of Baccharis (Baccharis anomala DC, Baccharis dentata (Vell) G. M. Barroso and Baccharis uncinella DC) collected
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/11/2011
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9. Estudo de Propriedades em Excesso de DeterminaÃÃo do EquilÃbrio LÃquido-LÃquido em Sistemas contendo Biodiesel. / Study of Properties in Excess Determination of Liquid-Liquid Equilibrium in Systems containing biodiesel.
Energias renovÃveis ganharam uma atenÃÃo importante nas Ãltimas dÃcadas devido à diminuiÃÃo das reservas de petrÃleo e o crescimento da conscientizaÃÃo ambiental. Elas podem ser produzidas a partir de uma variedade de gorduras e Ãleos vegetais, inclusive oleaginosas como coco e soja. A produÃÃo de biodiesel a partir de Ãleos vegetais à uma da
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/02/2010
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10. Regulação, dinâmica, riscos e oportunidades das operações de exploração e produção de campos maduros com acumulação marginais: o caso Bahia.
Since the enactment of Law n 9.478/97, which relaxed the monopoly on the extraction of oil and natural gas in Brazil, many discussions have been conducted by independent companies, associations of independent producers Association of Enterprises Producing Oil and Natural Gas Fields Extracted Marginal Brazil (APPOM), Cooperative Engineering Fields Mature (REC
Publicado em: 2010
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11. Tropical peat as a versatile material for solid-phase extraction of pesticides from medicinal plant Cordia salicifolia
A turfa natural foi testada na extração em fase sólida de acefato, clorprofam, pirimicarbe, bifentrina, tetradifona e fosalona da planta medicinal Cordia salicifolia, utilizando cromatografia a gás acoplada a espectrometria de massas no modo de monitoramento de íons selecionados. Considerando que a legislação brasileira não estabelece limites máximo
Journal of the Brazilian Chemical Society. Publicado em: 2010
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12. DETERMINATION OF POLYCHLORINATED BIPHENYLS IN POWDERED MILK AND ESTIMATED DAILY INGESTION IN PRE-SCHOLARS / DETERMINAÇÃO DE BIFENILOS POLICLORADOS EM LEITE EM PÓ E INGESTÃO DIÁRIA ESTIMADA POR PRÉ-ESCOLARES
The polychlorinated biphenyls are synthetic organoclorated substances that can produce noxious effects to health. There are not any natural sources of PCBs known in the environment. They can be liquid or solid, colorless or clear yellow. Some of them are volatile and may remain as steams in the air. They were widely used in the industry as oils for transform
Publicado em: 2010