RADWAN, H., ABDEL-MALAK, G. (2002). EFFECT OF SOME PACKAGING MATERIALS AND STORAGE TEMPERATURE ON QUALITY ATTRIBUTES OF POWDER AND SLICES OF DRIED TOMATOES. Egyptian Journal of Agricultural Research, 80(4), 1763-1776. doi: 10.21608/ejar.2002.316174
HUSSEIN M. RADWAN; GORG A. ABDEL-MALAK. "EFFECT OF SOME PACKAGING MATERIALS AND STORAGE TEMPERATURE ON QUALITY ATTRIBUTES OF POWDER AND SLICES OF DRIED TOMATOES". Egyptian Journal of Agricultural Research, 80, 4, 2002, 1763-1776. doi: 10.21608/ejar.2002.316174
RADWAN, H., ABDEL-MALAK, G. (2002). 'EFFECT OF SOME PACKAGING MATERIALS AND STORAGE TEMPERATURE ON QUALITY ATTRIBUTES OF POWDER AND SLICES OF DRIED TOMATOES', Egyptian Journal of Agricultural Research, 80(4), pp. 1763-1776. doi: 10.21608/ejar.2002.316174
RADWAN, H., ABDEL-MALAK, G. EFFECT OF SOME PACKAGING MATERIALS AND STORAGE TEMPERATURE ON QUALITY ATTRIBUTES OF POWDER AND SLICES OF DRIED TOMATOES. Egyptian Journal of Agricultural Research, 2002; 80(4): 1763-1776. doi: 10.21608/ejar.2002.316174
EFFECT OF SOME PACKAGING MATERIALS AND STORAGE TEMPERATURE ON QUALITY ATTRIBUTES OF POWDER AND SLICES OF DRIED TOMATOES
Food Technology Research Institute, Agricultural Research Center, Giza, Egypt
Abstract
Tomato fruits (Peto 86 variety) were used in this investigation for the production of both tomato powder and dried tomato slices. Ventilated oven dryer was used in the drying process. Powder and slices of tomatoes were packed in three different types of packaging materials i.e milky polypropylene, polyproplene metalized and trilayerbags then stored at both ambient temperature and refrigerator at +5°C for 6 months. Samples were analyzed at intervals of two months for moisture content, total titratable acidity, reducing sugars, total sugars, ascorbic acid, lycopene, color index, microbial count and organoleptic qualities. Lycopene and ascorbic acid decreased while color index increased by increasing the storage period in all samples. Slight changes in sugars and total titratable acidity content were observed. Results also showed that all samples contained less than 30 colonies forming unit per gram for both total bacterial, mold and yeast count during storage. Chemical analysis and organoleptic evaluation revealed that samples packed in trilayer bags and stored in refrigerator were the best during storage.
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