Extraction With Supercritical Fluids
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Partial-hydrothermal hydrolysis is an effective way to recover bioactives from turmeric wastes
Abstract Partial-hydrothermal hydrolysis using pressurized hot water was applied in waste turmeric, derived from extraction processes that employed supercritical and pressurized fluids, as a sustainable alternative for the recovery of bioactive constituents from this material. The reaction products consisted of a liquid extract of fermentable sugars and a so
Food Sci. Technol. Publicado em: 26/10/2017
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2. MÉTODOS DE EXTRAÇÃO DE POLI-HIDROXIALCANOATOS A PARTIR DE BIOMASSA BACTERIANA
Polyhydroxyalkanoates (PHAs) are biodegradable and biocompatible polyesters intracellularly accumulated by many bacteria as an energy reserve material and carbon source. These biopolymers may be extracted from cells after their production phase, and the extraction process involves various individual operations to ensure adequate removal of the biopolymer fro
Quím. Nova. Publicado em: 2015-11
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3. Extração, micronização e estabilização de pigmentos funcionais : construção de uma unidade multipropósito para desenvolvimento de processos com fluídos pressurizados / Extractionm micronization and stabilization of functional pigments : construction of multipurpose unit for pressurized fluid process development
The food industry is continuously searching compounds that present physical and chemical properties to improve their products. Most of them are additives with antioxidant properties, colorants or additives with positive effects to human health. Natural additives are always preferred to synthetic compounds. Flavonoids and carotenoids are two of the major func
Publicado em: 2011
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4. Purificação e funcionalização de nanotubos de carbono e produção de compósitos de matriz epóxi reforçados com nanotubos de carbono aminados / Purification and functionalization of carbon nanotubes and epoxy matrix composites production reinforced with amino carbon nanotubes
Uma das mais freqüentes questões na fabricação de compósitos com nanotubos de carbono (NTC) é a interação interfacial entre os NTC e a matriz. Com o intuito de melhorar esta interação os nanotubos de carbono de parede múltipla (NTCPM), após prévia oxidação, foram funcionalizados com grupos amínicos por duas rotas diferentes, uma via Me2NSO2Cl
Publicado em: 2011
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5. Reator de membrana enzimático e fluidos supercríticos: associação de processos
The aim of this work is to present the new applications of membrane technology in fat and oil processing, with emphasis on development and applications of the enzymatic membrane reactor and its association with extraction and purification technology by supercritical fluids (SCF). Combining the extraction by SCFs and the separation by membranes allows the int
Química Nova. Publicado em: 2007-08
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6. Study About the Potentiality of the Extraction of Natural Products Using Supercritical CO2. / Estudo da Potencialidade da Extração de Produtos Naturais utilizando CO2 Supercrítico.
This study presents a work about different industrial segments that can use extraction with supercritical fluid as one of its stages in this process. Researches were carried out in the pharmaceutical and food development areas so as to evaluate its operation potential, carrying out extractions of substances out of a matrix as, for example, obtaining essentia
Publicado em: 2007
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7. Extraction of tannin by Acacia mearnsii with supercritical fluids
Neste trabalho foram utilizados dois processos de extração de tanino vegetal: extração a quente em aparelho Soxhlet e extração com CO2 supercítico. Os resultados mostraram que o melhor co-solvente para extração de taninos com CO2 supercrítico foi a água na concentração de 5% e o melhor solvente para lavagem do trap foi o metanol.
Brazilian Archives of Biology and Technology. Publicado em: 2004-11
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8. Hydrolysis, with subcritical water and Co2, of the starch and cellulose gifts in the residue of supercritical extration of ginger (Zingiber officinale Roscoe) : production of oligossacarids. / Hidrolise, com agua subcritica e CO2, do amido e celulose presentes no residuo de extração supercritica de gengibre (Zingiber officinale Roscoe) : produção de oligossacarideos.
Cellulose and starch contained in aromatic-plant residues, which had been subjected to supercritical CO2 extraction, were hydrolyzed with subcritical water and CO2 to obtain oligosacharides. Cellulose and starch are not soluble in supercritical CO2; therefore, they remained in the solid matrix after the supercritical extraction. The extraction step acted as
Publicado em: 2004
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9. Recovery of tocopherols of the distilled one of the desodorization of the palm oil : fractionization with supercritical carbon dioxide. / Recuperação de tocoferois do destilado da desodorização do oleo de palma : fracionamento com dioxido de carbono supercritico
O óleo de palma e seus subprodutos são fontes de tocoferóis. Os tocoferóis, por sua vez , são compostos de grande importância para a indústria alimentícia, farmacêutica e cosmética. Eles agem no organismo como vitaminas lipossolúveis essenciais na nutrição humana por inibirem a formação de radicais livres e seus efeitos nocivos sobre o organis
Publicado em: 2004
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10. Analise do desempenho de plantas de extração de oleo convencionais e de processos supercriticos
Conventional extraction and supercritical process are two forms of obtaining vegetable oil and products with high value. Seed oil extraction is traditionally based on the use of organic solvents. The hexane extraction process is nowadays mostly used in the industry. Supercritical fluid technology may be a viable alternative to current extraction methods. It
Publicado em: 2000
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11. Estudo da predição da solubilidade dos oleos essenciais de laranja e limão e aroma de maçã em dioxido de carbono pressurizado
The essential oils of lemon and orange,. are products economic importance to Brazil and obtain these products with high quality, is a technological characteristic of process, highly desirable. Procedures as desterpenation of the oils, increasing its stability, should also be accomplished with the minimum alteration in the characteristics of the products. The
Publicado em: 1999