Lipids Extraction
Mostrando 25-36 de 132 artigos, teses e dissertações.
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25. Extraction of oil and minor lipids from cold-press rapeseed cake with supercritical CO2
This study examines the extraction of oil from cold-press rapeseed cake using Supercritical CO2(SC-CO2). The effects of pressure (20, 30, and 40 MPa), temperature (40, 50, and 60 ºC), and extraction time (60, 90, and 120 min) on oil yield and composition (tocopherols and carotenoids) were studied using response surface design. The results indicated that pre
Braz. J. Chem. Eng.. Publicado em: 2012-09
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26. Isolamento e análise química parcial de exopolissacarídeos da diatomácea marinha cultivada Coscinodiscus wailesii (Coscinodiscales, Bacillariophyta)
The marine diatom Coscinodiscus wailesii has attracted ecological interest because their blooms affect fishing areas. The aim of this work was the isolation, extraction and partial chemical characterization of soluble exopolysaccharide and bound exopolysaccharide from C. wailesii. Cultures were grown in Guillards f/2 medium under controlled conditions of tem
Quím. Nova. Publicado em: 2012
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27. ProspecÃÃo de proteÃnas envolvidas no amadurecimento pÃs-colheita da graviola (Annona muricata L.) / Prospecting for proteins involved in post-harvest ripening of soursop (Annona muricata L.)
The soursop (Annona muricata L.) fruit is widely used in food, because it provides vitamins, carbohydrates, proteins, lipids and other molecules for human nutrition. In recent years, soursop (exotic tropical fruit) has had a prominent position in the Brazilian economy, especially for northeastern states such as, Ceara, Alagoas, Bahia and Pernambuco. The high
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011
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28. Albumina modificada por glicação avançada no diabete melito tipo 1 e 2 prejudica o transporte reverso de colesterol e favorece o acúmulo de lípides em macrófagos / Impairment in reverse cholesterol transport and macrophage lipid accumulation induced by advanced glycated albumin drawn from uncontrolled type 1 and type 2 diabetes mellitus patients
Advanced glycation end products are prevalent in diabetes mellitus and alter lipids and lipoprotein metabolism. In this study we analyzed the role of albumin, isolated from control individuals (C, n = 12) and uncontrolled type 1 (DM 1, n = 13) and type 2 (DM 2, n = 11) diabetes mellitus patients on macrophage cholesterol removal, intracellular lipid accumula
Publicado em: 2011
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29. Extração supercritica de astaxantina e lipideos ricos em acidos graxos omega -3 a partir de residuos de camarão-rosa (Farfantepenaeus paulensis) / Supercritical extraction of astaxanthin and lipids with high content of omega -3 from brazilian redspotted shrimp waste (Farfantepenaeus paulensis)
O rendimento de processamento e a composição centesimal dos resíduos de camarão-rosa (Farfantepenaeus paulensis) foram investigados. Os resultados indicaram que nos resíduos de camarão (cabeça, casca e caudas liofilizadas) apresenta-se um alto conteúdo protéico (48,8% b.s.) e um alto nível de resíduo mineral (27,0% b.s.). Os resíduos de camarão
Publicado em: 2010
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30. Extração, caracterização e modificação quimica por oxidação de amido de pinhão (Araucaria angustifolia) / Extraction, characterization and chemistry modification by oxidation of Brazilian pine (Araucaria angustifolia)
The Brazilian pine, seed of Araucaria angustifólia (Betortoloni, Otto Kuntze), has a high carbohydrate content, principally starch. The literature is scarce and contradictory in some points, indicating the need for a profound understanding of the characteristics of the starch of this pine, mainly with respect to extraction methods and to chemical modificati
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/03/2009
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31. Métodos de extração e qualidade da fração lipídica de matérias-primas de origem vegetal e animal
Methodologies of extraction of lipids from chicken breast and oats flakes were evaluated: Soxhlet, Folch et al., Bligh & Dyer and Hara & Radin. For chicken breast, the methods Soxhlet, Folch et al. and Bligh & Dyer presented the highest yields in total lipids. With oat flakes, the methods Soxhlet and Bligh & Dyer presented higher yields than the Hara & Radin
Química Nova. Publicado em: 2009
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32. Aceitação e preferência por cafés submetidos a diferentes métodos de extração de cafeína / Acceptance and preference for coffees submitted to different methods of extraction of caffeine
Introduction: researches have been made to determine the coffee components and its functions, sensory characteristics and effects related to human health. Caffeine is one of the most consumed psychoactive substances in the world. During the last five decades, the worldwide caffeine consumption almost doubled, mainly trough coffee. For this reason, many studi
Publicado em: 2009
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33. Determination of polyunsaturated fatty acid in infant formulas: comparison of quantization methods by gas chromatography / Determinação de ácidos graxos polinsaturados em fórmulas infantis: comparação de metodologias na análise por cromatografia em fase gasosa
Long chain polyunsaturated fatty acids are involved in several physiological and metabolic process of human organism. The quantification of polyunsaturated fatty acid, must involve the fat extraction in mild conditions, due the reactive sites in the molecule. This work had as objective the comparison of the analytical methods for determination of polyunsatur
Publicado em: 2009
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34. Fitodisponibilidade de metais, caracterização nutricional, constituição química, avaliação da atividade antioxidante e antibacteriana do óleo essencial extraído das folhas da Cinnamomum zeylanicum Breyn / PHYTOAVAILABILITY OF METALS, NUTRITIONAL CHARACTERIZATION, CHEMISTRY CONSTITUTION, EVALUATION OF THE ANTIOXIDANT AND ANTIBACTERIAL ACTIVITY OF ESSENTIAL OIL EXTRACTED FROM Cinnamomum zeylanicum Breyns LEAVES.
The use of plants to medicine aims is an ancient practice. Its estimated that most of the plants used in the popular medicine has not been studied about their chemical compounds, phamacological action and their actual therapeutic indications, without consider the plants that has not been still identified. The Cinnamomum (Lauraceae) gender is constituted by a
Publicado em: 2009
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35. Efeitos de terpenos nas membranas de estrato córneo estudados por ressonância paramagnética eletrônica / Effects of terpenes on the stratum corneum membranes studied by electron paramagnetic resonance
The interaction of the skin penetration enhancers DL-menthol, -terpineol, 1,8-cineole and (+)-limonene with membranes of the uppermost skin layer, the stratum corneum (SC) and with multilamellar vesicles from 1,2-dipalmitoyl-sn-glycero-3-phosphaticylcholine (DPPC)is investigated by electron paramagnetic resonance (EPR) spectroscopy using spin-labeled
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/02/2008
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36. Extraction of caffeine, chlorogenic acids and lipids from green coffee beans using supercritical carbon dioxide and co-solvents
The paper reports on experimental data on the extraction of caffeine, coffee oil and chlorogenic acids from green coffee beans using pure supercritical CO2 and supercritical CO2 modified with ethanol (5% w/w) and isopropyl alcohol (5% w/w) at 50 and 60ºC and 15.2 24.8 e 35.2 MPa. In this study extraction kinetics were obtained for all assays i.e. samples we
Brazilian Journal of Chemical Engineering. Publicado em: 2008-09