期刊
BRAZILIAN ARCHIVES OF BIOLOGY AND TECHNOLOGY
卷 47, 期 2, 页码 233-245出版社
INST TECNOLOGIA PARANA
DOI: 10.1590/S1516-89132004000200011
关键词
yellow passion fruit juice; passion fruit processing; storage; physical and chemical analysis; volatile compounds
类别
Changes in Hunter L a and b values, glucose, fructose and sucrose contents, concentration of four volatile compounds (ethyl butirate, ethyl caproate, hexyl butirate and hexyl caproate) and furfural, were studied in yellow passion fruit juice (Passiflora edulis var. flavicarpa) pasteurized at 75degreesC/60s, 80degreesC/41s or 85degreesC/27s, during storage at room temperature (25+/-5degreesC) and refrigeration (5+/-1degreesC) for 120 days. While the sucrose content decreased, the glucose and fructose contents increased significantly over storage time. The Hunter L and b values behaved similarly, with a tendency to decrease over time, inversely to Hunter a value. Volatile compound concentrations also decreased over time. inversely to the furfural content. Pasteurization at 85degreesC/27s resulted minimum changes in the studied passion fruit characteristics, while that at 75degreesC/60s was the most harmful. Storage under refrigeration tended to keep the best quality characteristics Of the juice.
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