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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

UtilizaÃÃo da farinha de linhaÃa (Linum usitatissimum L.) no processamento de biscoito tipo "cracker": caracterÃsticas fÃsico-quÃmicas, nutricionais e sensoriais. / Use of the flour of flaxseed (Linum usitatissimum L.) in the biscuits processing like "to cracker": characteristics sensorial physicochemical, nutrition and sensory.

Leda Maria Braga Maciel 30 August 2006 (has links)
FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico / Na Ãltima dÃcada o consumo de linhaÃa (Linum usitatissimum L.) vem aumentando e despertando o interesse de muitos pesquisadores, porque ela contÃm combinaÃÃes funcionais como o Ãcido linolÃnico (ALA), lignanas e fibras que estÃo relacionados ao seu potencial benÃfico à saÃde. VÃrios estudos comprovaram os benefÃcios da alimentaÃÃo suplementada com linhaÃa na prevenÃÃo e tratamento de diversas enfermidades, entre elas: doenÃas vasculares, cÃncer, diabetes, artrite, lÃpus, sintomas da menopausa e pÃsmenopausa, constipaÃÃo, entre outros. Assim o objetivo desse trabalho foi desenvolver biscoitos tipo cracker, adicionados de 10%, 15% e 20% de farinha de linhaÃa (CL10, CL15 e CL20) a partir de uma formulaÃÃo sem adiÃÃo de farinha de linhaÃa (CSL) e avaliar suas caracterÃsticas fÃsicas, quÃmicas, instrumentais, reolÃgicas e sensoriais. A farinha de linhaÃa provocou mudanÃas significativas na reologia da massa, melhorando os parÃmetros de espessura, comprimento e largura dos biscoitos. O teste de Tuckey mostrou que a umidade da amostra CL10 nÃo diferiu ao nÃvel de 5% de significÃncia dos biscoitos CSL, CL15 e CL20, entretanto o CSL diferiu (p<0,05) da CL15 e CL20. As modificaÃÃes mais significativas na composiÃÃo dos biscoitos foram verificadas nos teores de lipÃdios e proteÃnas. Todos os crackers com adiÃÃo de farinha de linhaÃa apresentaram-se mais escuros que o CSL. A aceitabilidade dos crackers foi avaliada por 96 provadores, quanto à aparÃncia, cor, sabor, textura, aceitaÃÃo geral, intenÃÃo de compra e escala do ideal para dureza. Houve diferenÃa significativa (p<0,05) para todos os atributos, entre as formulaÃÃes, com exceÃÃo das formulaÃÃes CSL e CL20. Os resultados de intenÃÃo de compra sugeriram que os consumidores tiveram maior interesse na aquisiÃÃo dos crackers com adiÃÃo de 15% de farinha de linhaÃa. A adiÃÃo de farinha de linhaÃa provocou aumento significativo nos teores de proteÃnas, sais minerais e fibras, tornando os biscoitos em um produto com alto teor de fibra alimentar. / In the last decade the consumption of flaxseed (Linum usitatissimum L.) is increasing and awaking the interest of many searchers because it contains functional compounds as alphalinolenic acid, lignans and fibers related to its beneficial potential for health. Several studies confirmed the benefits of food enriched with flaxseed in prevention and treatment of several diseases as vascular disease, cancer, diabetes, arthritis, lupus, symptoms of menopause and post menopause, constipation, etc. The purpose of this work was to develop biscuits like cracker, added 10%, 15% and 20% of flaxseed flour (CL10, CL15 and CL20) from the formulation without addition of flaxseed flour (CSL) and evaluate its physical, chemical, instrumental, rheological and sensory characteristics. The flaxseed flour provoked significant changes in rheology of dough, improving the thickness, length and width parameters of crackers. The Tuckey test showed that the humidity of sample CL10 didnât differ to the level (p<0,5) of crackers CSL, CL15 and CL20, however the CSL cracker differed of CL15 and CL20 crackers. The most meaningful changes in the composition of crackers were verified in lipids and protein content. All crackers with addition of flaxseed flour showed darker than CSL cracker. 96 panelists as for appearance, color, flavor, texture, global acceptance, purchase intent and ideal scale for texture assessed the acceptability of crackers. There was a meaningful difference among the formulations (p<0,5) in all attributes, excepting CSL and CL20 crackers. The results of purchase intent suggested that the consumers had a major interest on acquisition of CL15 crackers. The addition of flaxseed flour provoked significant increases on protein, mineral salts and fibers contents of crackers, transforming them in a product with high content of alimentary fibers.
2

AplicaÃÃo das Farinhas de LinhaÃa (Linum usitatissimum L.) e Maracujà (Passiflora edulis Sims f. flavicarpa Deg.) no Processamento de PÃes com Propriedades Funcionais / Application of flaxseed (Linum usitatissimum L.) and passion fruit flour (Passiflora edulis Sims F. flavicarpa Deg.) in the bread processing with functional properties

CÃndice Camelo Lima 30 August 2007 (has links)
nÃo hà / Os benefÃcios do consumo de produtos alimentÃcios com propriedades funcionais vÃm aumentando e desenvolvendo interesse nas Ãltimas dÃcadas em muitos pesquisadores e consumidores. A linhaÃa (Linum usitatissimum L.) tem sido considerada um ingrediente funcional de grande importÃncia por conter combinaÃÃes funcionais como o Ãcido linolÃnico (ALA), lignanas e fibras. Diversas pesquisas evidenciam os efeitos positivos da alimentaÃÃo acrescentada com linhaÃa no tratamento e prevenÃÃo de muitas enfermidades como: doenÃas cardiovasculares, cÃncer, artrite, sintomas indesejÃveis da menopausa, constipaÃÃo, entre outras. A farinha do maracujà vem demonstrando possuir a capacidade de reduzir o chamado âmau colesterolâ (LDL) e aumentar o âbom colesterolâ (HDL), sendo indicada como auxiliar no tratamento do diabetes e reduÃÃo de peso. Assim este trabalho teve como objetivo desenvolver um produto de panificaÃÃo com caracterÃsticas funcionais. Foram elaboradas quatro formulaÃÃes de pÃo de forma, sendo uma formulaÃÃo padrÃo, sem adiÃÃo das farinhas de linhaÃa e maracujà (FP) e trÃs substituindo-se parcialmente a farinha de trigo por percentuais de farinha de linhaÃa 4% (FML4), 7% (FML7) e 10% (FML10), e todas com adiÃÃo de 3% de fibra alimentar (farinha de maracujÃ). As amostras foram avaliadas quanto Ãs suas caracterÃsticas fÃsicas, quÃmicas, fÃsico-quÃmicas, reolÃgicas, sensoriais e microbiolÃgicas. Foram submetidos a testes sensoriais de aceitaÃÃo global, aceitaÃÃo por atributos e intenÃÃo de compra. Os dados foram analisados estatisticamente atravÃs de anÃlise descritiva, anÃlise de variÃncia (ANOVA) e teste de Tukey para comparaÃÃo das mÃdias, utilizando nÃvel de significÃncia de 5% (p&#8804;0,05). As modificaÃÃes mais significativas na composiÃÃo dos pÃes com adiÃÃo de farinha de linhaÃa e farinha de maracujà foram verificadas nos teores de proteÃnas, lipÃdios, carboidratos, fibras e valores calÃricos. A aceitabilidade dos pÃes foi avaliada por 60 provadores, quanto ao aroma, textura, sabor, sabor residual, aceitaÃÃo geral e intenÃÃo de compra atravÃs da escala hedÃnica e escala do ideal para avaliar aroma, maciez, sabor e sabor residual. Todas as formulaÃÃes analisadas receberam valores hedÃnicos na faixa e aceitaÃÃo em todas as variÃveis. Os resultados de intenÃÃo de compra sugeriram que os consumidores tiveram maior interesse nos pÃes FML4 e FML7. A adiÃÃo da farinha de linhaÃa e farinha de maracujà provocou aumento significativo nos teores de fibras, tornando os pÃes com alto teor de fibra alimentar / In the last decades, there is a growing in the interest research and consume foods product with functional properties. This happening due the public knowledge of these productâs benefits. The flaxseed (Linum usitatissimun L.) has been considerated a functional ingredient of great importance. This importance is due its functional combinations such as linolenic acid, lignans and fibers that are potentially beneficial to our health. Several researches evidence the positive effects of adding flaxseed to the food to the combat and prevention of many diseases, for example: cancer, constipation, menopause, disease cardiovascular, among others. The passion fruit flour has demonstrated its ability to reduce the bad cholesterol (LDL) and to increase the good cholesterol (HDL). Therefore, the passion fruit flour has been pointed out as an auxiliary in the treatment of diabetes and weight reduction. Thus, this research work has the purpose of developing bread with functional characteristics. We have formulated four experiments. The first one, the standard bread (FP), without the addition of flaxseed and passion fruit flour. In the other three experiments have received 3% of fiber food (fruit passion flour) and additionally 4% (FML4), 7% (FML7) and 10% (FML10) of flaxseed flour. The experiments were evaluated over their physic, chemical, physic-chemical, sensorial, microbiological and rheologic characteristics. They were put under sensorial tests to prove the global acceptance, acceptance for the attributes of purchasing intention. The data were statically investigated through descriptive analysis and variance analysis (ANOVA) and the Tukey test for comparison of the averages, using the significance level of 5% (p&#8804;0,05). The most noteworthy modifications in the composition of the bread that were added flaxseed flour were verified into values of proteins, lipids, calories, fibers and carbohydrates. The acceptability of the bread was evaluated by 60 volunteers by the attribution of flavor, taste, texture, residual taste, smoothness, and general reception and purchase intention. These evaluations were made by hedonic scale and the ideal scale to value aroma, taste, texture and residual taste. All analyzed results had received hedonics values in the range and a global acceptance. The outcome of purchasing intention suggested that the volunteers have shown more interest to the bread FML4 and FML7. The addition of flaxseed flour and passion fruit flour has promoted a significant increase on the fiber amount, turning the bread with high amount of fiber food

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