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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

Caracterização bromatológica e perfil em ácidos graxos de bebidas lácteas não fermentadas / Bromatologic characterization and fat acids profile of milk beverages not fermented

Amaral, João Batista Silvestre do 11 October 2010 (has links)
The main objective of this work is to determine the fat acids profile of milk beverages not fermented available in the market of Maceió-AL city. Samples of milk beverage not fermented were acquired in Maceio s market and it were submitted for pH, lipids and protein analysis and fat acids profile by gas chromatographic GC-MS analysis of its methyl esters. The samples shows in the package s nutritional information null trans fat acid contents, and variations on the contents of proteins, total lipids and carbohydrates. The analytic results show that samples pH was between 6,6 and 7,0; the total carbohydrates content between 14,1 and 24,9 g/200mL; the total lipids content changes about 3,7 and 6,3 g/200mL; the proteins content on the range of 2,5 up to 4,9 g/200 mL. The chromatographic analysis shows that more abundant fat acids were C6:0, C8:0, C10:0, C11:0, C12:0, C14:0, C15:0, C16:1n7c, C16:0, C18:2n6c, C18:2n6t, C18:1n9c + C18:1n9t, C18:0. The analytical results disagree from package s nutritional information, the trans fat content is not null, and that food compound presents omega 6, but no omega 3 essentials fat acids. / O principal objetivo deste trabalho é determinar o perfil em ácidos graxos de bebidas lácteas não fermentadas disponíveis no comércio da cidade de Maceió-AL. Amostras de bebidas lácteas não fermentadas obtidas no comércio de Maceió foram submetidas a análises de pH, lipídios, carboidratos, proteínas, e o perfil em ácidos graxos por cromatografia gasosa de seus ésteres metílicos. As amostras apresentaram nas informações nutricionais da embalagem, teor de gorduras trans nulo e variação nos teores de proteínas, lipídios totais e carboidratos. Os resultados analíticos mostram que o pH das amostras esteve entre 6,6 e 7,0; o teor de carboidratos totais entre 14,1 e 24,9 g/200mL; o teor de lipídios totais variou de 3,7 a 6,3 g/200mL; o teor de proteínas de 2,5 a 4,9 g/200 mL. A análise cromatográfica mostrou que os ácidos graxos mais abundantes foram C6:0, C8:0, C10:0, C11:0, C12:0, C14:0, C15:0, C16:1n7c, C16:0, C18:2n6c, C18:2n6t, C18:1n9c + C18:1n9t, C18:0. Os resultados analíticos divergem das informações nas embalagens, o teor de gordura trans não é nulo, e o composto alimentar apresenta ácidos graxos essenciais ômega 6, mas nenhum ômega 3.

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