Optimization of the production conditions of ethyl esteres from fish oil with high content of in omega-3 long chain fatty acids

The production of ethyl esters by alcoholysis is an alternative for splitting triacylglycerols due to the possibility of using low temperatures, which results in oxidative protection of the polyunsaturated fatty acids. Ethyl esters produced under mild conditions of temperature could be used as substrate for obtaining structured lipids. The reaction parameters of production of ethyl esters from fish oil with high content of omega-3 fatty acids by alcoholysis were optimized using response surface methodology. An experimental design (2³) (with levels +1 and -1, six axial points with levels -alpha and +alpha and three central points) was applied. The variables investigated were concentration of catalyst, amount of ethyl alcohol and temperature. Ethyl ester conversion was monitored by high performance size exclusion chromatography (HPSEC) and the best result obtained was 95% conversion rate. The optimal conditions were 40 °C, 1% of NaOH and 36% of ethanol.956959Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

APLICAÇÕES DA TECNOLOGIA DE MEMBRANAS NO PROCESSAMENTO DE ÓLEOS VEGETAIS

Esta revisão de literatura teve como objetivo relatar as pesquisas que têm sido realizadas sobre a aplicação da tecnologia de membranas na área de óleos vegetais, com ênfase particular nas etapas de degomagem, desacidificação e remoção de pigmentos. Estudos sobre a concentração de tocoferóis também foram abordados. O processamento de óleos através de membranas, efetivado em baixas temperaturas e com eliminação de diversas etapas frente aos métodos convencionais, apresenta-se como alternativa promissora, refletindo a tendência mundial por processos menos dispendiosos e tecnologicamente mais avançados. APPLICATIONS OF MEMBRANE TECHNOLOGY IN VEGETABLE OIL PROCESSING Abstract The purpose of this review was to report the research that has been carried out in the application of membrane technology in the area of vegetable oils, with particular emphasis on degumming stage, deacidification and pigments removal. Studies about tocopherols concentration also were reported. The oils processing with membranes, done under low temperatures and with substantial exclusion of stages instead of using conventional method, presents a promising alternative, reflecting the world tendency for less costly but at the same time technically more advanced processes

Reator de membrana enzimático e fluidos supercríticos: associação de processos Enzymatic membrane reactor and supercritical fluids: process association

<abstract language="eng">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 integration of extractions reactions with selective separation by membranes through filtration of the supercritical mixture (SCF + extracted solutes). This association provides important energy savings regarding the SCF recompression costs

Interesterificação química: alternativa para obtenção de gorduras zero trans Chemical interresterification: alternative to production of zero trans fats

<abstract language="eng">The function of lipids in human nutrition has been intensively debated in the last decade.This context reinforces the concern about controlling the trans fat ingestion, due to its negative implications on health. Interesterification provides an important alternative to modify the consistency of oils and fats without causing formation of trans isomers. This article reports research done towards production of zero trans fats by chemical interesterification, for different industrial purposes. Aspects related to the effect of trans fats on diet, their impact on health and modifications in Brazilian legislation are also covered

In vitro and in vivo antioxidant properties of bioactive compounds from Green Propolis obtained by ultrasound-assisted extraction

International audienceGreen propolis presents a potential source of bioactive compounds, responsible for its antioxidant capacity. The effects of ethanol concentration, solid-solvent ratio, and extraction time were evaluated in regard to the total phenolic content (TPC) and antioxidant capacity of the extracts by the use of central composite rotatable designs. Optimum extraction conditions lead to significant reduction of extraction time compared to conventional extraction methods. Under optimum conditions, extracts were composed of 1614.80 mg GAE. g−1 and 807 mg artepillin C. g−1. Extracts were effective in retarding the oxidation in oil-in-water emulsions subjected to accelerated tests. Green propolis extracts (up to 200 mg.kg−1) did not increase Saccharomyces cerevisiae cell damage after 4 h of exposure, indicating its antioxidant effect and potential innocuity. Results demonstrated the antioxidant properties of the propolis extract was similar or better than the ones from synthetic antioxidants and warrant further investigation to determine its potential industrial application

Otimização das condições de produção de ésteres etílicos a partir de óleo de peixe com elevado teor de ácidos graxos ômega-3

The production of ethyl esters by alcoholysis is an alternative for splitting triacylglycerols due to the possibility of using low temperatures, which results in oxidative protection of the polyunsaturated fatty acids. Ethyl esters produced under mild conditions of temperature could be used as substrate for obtaining structured lipids. The reaction parameters of production of ethyl esters from fish oil with high content of omega-3 fatty acids by alcoholysis were optimized using response surface methodology. An experimental design (2³) (with levels +1 and -1, six axial points with levels -alpha and +alpha and three central points) was applied. The variables investigated were concentration of catalyst, amount of ethyl alcohol and temperature. Ethyl ester conversion was monitored by high performance size exclusion chromatography (HPSEC) and the best result obtained was 95% conversion rate. The optimal conditions were 40 degreesC, 1% of NaOH and 36% of ethanol

Otimização das condições de produção de ésteres etílicos a partir de óleo de peixe com elevado teor de ácidos graxos ômega-3

The production of ethyl esters by alcoholysis is an alternative for splitting triacylglycerols due to the possibility of using low temperatures, which results in oxidative protection of the polyunsaturated fatty acids. Ethyl esters produced under mild conditions of temperature could be used as substrate for obtaining structured lipids. The reaction parameters of production of ethyl esters from fish oil with high content of omega-3 fatty acids by alcoholysis were optimized using response surface methodology. An experimental design (2³) (with levels +1 and -1, six axial points with levels -alpha and +alpha and three central points) was applied. The variables investigated were concentration of catalyst, amount of ethyl alcohol and temperature. Ethyl ester conversion was monitored by high performance size exclusion chromatography (HPSEC) and the best result obtained was 95% conversion rate. The optimal conditions were 40 °C, 1% of NaOH and 36% of ethanol