- 期刊
- OpenAccess
Modified Atmosphere Packaging for Maintaining Quality and Shelf Life Extension of Persimmon Fruits
並列摘要
The beneficial effects of using Modified Atmosphere Packaging (MAP) of persimmon fruits to extend its availability for export purpose to perform the consumers and markets demands were investigated during two successive seasons of 2007 and 2008. Hachia and Triumph persimmon fruits were harvested at three quarter color stage and enclosed in different packaging materials of Low Density Polyethylene (LDPE) bags at the thickness of 2, 4 and 7 μm LDPE. 100% Nitrogen gas was flushed into the bags for complete replacing of normal air while control fruits were packed with aerobic atmosphere for each thickness. Fruit quality characteristics i.e. fruit firmness, respiration rate, fruit color, Softening as days to eat soft, soluble solid content, total acidity, ascorbic acid content, total phenols and total tannins were assessed periodically after storage periods at 0ºC and after 7 days at 20ºC and 80-85% RH. Packaging fruits at 7 μm Low Density Polyethylene film (LDPE) with N_2 (100%) can be more effective in keeping fruits firm with the least respiration rate during storage and after ripening at 20°C than 4 and 2 μm LDPE films and control fruits for the two cultivars respectively. Lightness (L*) and Chroma (C*) color parameters had the significant highest values in fruits received (N_2) application and packaged with 7 μm LDPE after 90 d storage at 0°C and 7d ripe. SSC had slight insignificant decrease throughout the storage period at 20°C due to different polyethylene packaging films and 100% N_2 exposure, also untreated fruits showed the same direction. LDPE film at 7 μm thickness recorded the highest content of ascorbic acid but with the least level of acidity and phenols content followed by 4 and 2 μm films throughout storage and ripening periods. Total tannins as indicator of removing fruit astringency were as storage period extend and the thickness of LDPE films increase in packed persimmon fruits in the two cultivars respectively. Moreover, Triumph persimmon fruit had higher content of tannins compared with Hachia variety. These results were suggested that the highest thickness of LDPE film (7 μm) and N_2 (100%) are suitable application for modified atmosphere packaging (MAP) of Hachia and Triumph persimmon fruits as response for long storage under refrigeration with an additional period of time at ambient temperature.