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- MakaleYalnız künye2013Scopus SJRQ3Effects of harvesting time and modified atmosphere packaging on biochemical changes in potato tubers
Batu, Ali; Sen, Levent
Undamaged potato tubers (cv. 'Marfona') grown in Tokat, Turkey, were used in this study. The tubers were cured for two weeks at 15 degrees C and 75-85% relative humidity. The tubers were sorted for size, shape and physical damage and were divided into two groups. One group was left unwrapped and the other was placed on polystyrene trays and heat-sealed in 30, 40 or 60 mu m low density polyethylene (LDPE) film or 38 mu m c-polypropylene (CPP) film. The samples were kept in temperature-controlled rooms at 5 +/- 1 degrees C and 75-85% RH for eight months. Samples were taken every month during storage, and the internal colour, ascorbic acid, titratable acidity, pH and total soluble solids were determined. Results indicate that the harvesting time and storage period significantly affected quality parameters. The highest increases in total soluble solids, minimum change in pH, lowest titratable acidity and ascorbic acid values were found in tubers in 38 mu m CPP harvested on July 25th. The lowest pH and ascorbic acids were found in the 40 mu m LDPE packaged tubers, while maximum titratable acidity was found in the unwrapped tubers harvested on 20th September. The L* values indicate that the internal lightness of the tubers generally decreased during the storage period, indicating that they became a bit darker during storage.
- MakaleYalnız künye2010Scopus SJRQ3The effects of commercial diets supplemented with mannanoligosaccharide (MOS) and vitamin B12 on the growth and body composition of the shabbout fries (Tor grypus H. 1843)
Atar, Hasan Huseyin; Ates, Mehmet
Four hundred shabbout fries (Tor grypus L. 1758), with average initial weight of 0.95+/-0.02 g and total average length of 4.10+/-0.05 cm, were fed for a period of 90 days commercial feed with addition of mannanoligosaccharide (MOS) and vitamin B-12. The shabbouts were divided into four different groups and fed by different feeds (Control, Group A with MOS, Group B with vitamin B-12, Group C with the combination of MOS + vitamin B-12). The effects of feeding through MOS and vitamin B-12 in different proportions on growth in view of live weight and total length, survival rate, feed conversion, condition factor and protein efficacy were studied. The best growth in view of live weight of 4.51+/-0.16 g and length of 7.71+/-0.08 cm was maintained through vitamin B-12 in Group B. As a consequence, the growth parameters of the shabbout fries fed through commercial feeds with the addition of MOS and vitamin B-12 in different doses under empirical conditions showed affirmative effects on the survival rate, feed assessment, condition factor and protein efficacy.
- DergiJOURNAL OF FOOD AGRICULTURE & ENVIRONMENT
