7 research outputs found
Utilização do rancimat para a determinação do periodo de indução de oleos comestiveis
Orientador : Walter EstevesDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de AlimentosResumo: O resumo poderá ser visualizado no texto completo da tese digitalAbstract: The abstract is available with the full electronic documentMestradoMestre em Tecnologia de Alimento
Perfil de ácidos graxos e avaliação da alteração em óleos de fritura
The present study had the purpose of evaluating the profile of fatty acids and the total alteration of cottonseed, sunflower and palm oils brought about during discontinued frying processes of cassava frozen chips. An increase in the percentage of saturated fatty acids and a decrease in polyunsaturated fatty acids was observed, regardless of the type of oil used. With regard to the oil's global alteration, the results showed that palm oil, the most saturated one, underwent less alteration. However, none of the oils presented total polar compound values above the limits prescribed
Composição lipídica, características físicas e sensoriais de recheios de morango em biscoitos
Resumo Recheios de biscoito de cinco marcas comerciais brasileiras foram avaliados quanto a teor de lipídios, composição em ácidos graxos, atividade de água, diâmetro médio e distribuição do tamanho de partícula, aspecto morfológico, textura (firmeza e adesividade), além de avaliação sensorial, por teste de aceitação, quanto aos atributos: sabor global, sabor de morango, cor, arenosidade, cerosidade e firmeza. Os cinco recheios comerciais avaliados apresentam valores de atividade de água de 0,47 a 0,50. Apenas um diferiu quanto ao tamanho de partícula, apresentando o maior diâmetro médio e a menor aceitação da arenosidade. Quanto à firmeza, houve maior variação entre as marcas comerciais (37,41 a 124,04 gf), assim como na composição em ácidos graxos, indicando diferentes fontes lipídicas nas gorduras destinadas aos recheios. O teor médio de lipídios encontrado, 27,5%, está próximo ao da literatura, de 30%; porém, de acordo com a composição em ácidos graxos, o valor médio de ácidos graxos trans encontrado indica que a indústria pode estar realmente reduzindo os teores desses ácidos graxos, não obstante os valores de ácidos graxos saturados ainda mostrarem-se altos
Optimization of the production of double-shell microparticles containing fish oil
Fish oil incorporation into food products is a challenge because long-chain fatty acids are susceptible to oxidation. Microencapsulation is an alternative for protecting and delivering fish oil besides masking undesirable flavours. This work aimed to produce spray-chilled microparticles using spray-dried microparticles loaded with fish oil as the core material and evaluate the effects of core concentration and lipid wall material composition on the apparent viscosity of the feeding material (suspension), microparticle mean diameter (D50), moisture content and eicosapentaenoic acid and docosahexaenoic acid losses. Double-shell microparticles containing fish oil were successfully obtained. Higher core concentrations resulted in higher feeding material viscosities and microparticles with higher D50 values and higher moisture content, but suitable for food applications. Less eicosapentaenoic acid and docosahexaenoic acid loss was achieved with lipid matrixes containing palm fat/vegetable fat ratios of up to 40/60 or a ratio of 50/50 when associated with a low concentration of core material. The remaining eicosapentaenoic acid and docosahexaenoic acid content observed in the final double-shell microparticles and its good oxidative stability can be considered sufficient for the successful application of these microparticles in foods. These findings may contribute to expanding the use of microencapsulated fish oil255359369CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPNão tem2015/12398-4The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was financially supported by the Sa˜o Paulo Research Foundation (FAPESP) (Process 2015/12398-4) and by the National Council of Research and Technological Development (CNPq) that provided a scholarship to K.B.F. Paganott
Influence of potato cultivar, frying oil and sample pre-treatments on the contamination of french fries by 3-monochloropropane-1,2-diol fatty acid esters
This study investigated the influence of factors that could affect the levels of 3-MCPD esters in French fries, including the cultivar, the type of frying oil, and the use of pre-treatments such as blanching and application of edible coatings. Under the selected experimental conditions of frying, the cultivar Agata, which presented the highest dry matter content, showed the lowest oil uptake and 3-MCPD esters concentrations. In relation to the frying medium, the use of oils containing higher levels of 3-MCPD esters resulted in a higher contamination of French fries. Blanching treatment of potatoes before frying increased up to 33% the concentrations of 3-MCPD esters. On the other hand, the levels of the contaminants decreased by 19% with the application of a pectin solution. It could be observed that factors affecting oil uptake in French fries may also affect the contamination by 3-MCPD esters and should be considered as possible mitigation strategies to minimize human exposure to these chemical contaminants1244348FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP2011/08936-0; 2011/19043-612th Latin American symposium on food science (SLACA) : food science and its impact on a changing worl