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Effect of gamma radiation on lipids by the TBARS and NMR BABT
Silva,Adriana Cristina de Oliveira; Mársico,Eliane Teixeira; Jesus,Edgar Francisco Oliveira de; Guimarães,Carlos Frederico; Cortez,Marco Antonio Sloboda.
The aim of this work was to study the effect of gamma radiation on lipids by TBARS and NMR. The samples of raw whole milk were subjected to gamma radiation from Co60 in doses of 1, 2 and 3 kGy and the production of rancidity was studied through Nuclear Magnetic Resonance (NMR) and Thiobarbituric Acid Test (2-TBARS). The TBARS values increased according to the intensity of the radiation dose applied at the samples, demonstrating correlation between the radiation dose and the production of lipid oxidation. This was confirmed by NMR with the formation of peaks of aldehydes and ketones that were small and similar in the doses of 1 and 2 kGy. In the dose of 3 kGy, the total degradation of milk fat was observed. A correlation between the NMR and 2-TBA was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Milk; Gamma radiation; Rancidity; Thiobarbituric Acid Test; Nuclear Magnetic Resonance (NMR).
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000600021
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Milk from different species on physicochemical and microstructural yoghurt properties Ciência Rural
Vianna,Felipe Santana; Canto,Anna Carolina Vilhena da Cruz Silva; Costa-Lima,Bruno; Salim,Ana Paula; Balthazar,Celso Fasura; Costa,Marion Pereira; Panzenhagen,Pedro; Rachid,Rachel; Franco,Robson Maia; Adam Conte-Junior,Carlos; Silva,Adriana Cristina de Oliveira.
ABSTRACT: The aim of the present research was to evaluate differences in chemical properties and physical structure of yoghurt produced with milk from different species (sheep, cow, and goat). For each trial, whole raw sheep (S), cow (C), and goat (G) milk were used to manufacture 4L of yoghurts (Y) from each species (SY, CY, and GY, respectively). The SY demonstrated the greatest (P<0.05) values of total solids, protein, and lipid contents, reflecting on greater (P<0.05) firmness, apparent viscosity and water-holding capacity, and lower (P<0.05) syneresis index than CY and GY. Consequently, SY exhibited a more compact microstructure and homogeneous matrix with fewer pores. Furthermore, CY and GY microstructure contained a greater number of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fermented products; Texture; Microstructure; Sheep milk; Goat milk.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600750
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