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KMID : 1007519960050040330
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Food Science and Biotechnology
1996 Volume.5 No. 4 p.330 ~ p.333
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Interrelation between Respiration Rate , Peel Permeability and Internal Atmosphere for Sealed and Wax - coated Satsuma Mandarin Oranges
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Lee, Dong Sun
Koh, Jeong Sam/Chung, Sun Kyung
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Abstract
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Respiration of sealed (PVC wrap) and wax-coated (carnauba wax; sucrose polyester of fatty acids) Satsuma mandarin oranges (Citrus unshiu) was measured by a closed system method at different temperatures (4, 10 and 20℃) and correlated to internal atmosphere to elucidate the relationship between respiration rate and permeability of coated peel to O₂and CO₂gases. Sealing or coating treatment reduced apparent respiration rate and peel permeability of oranges, and maintained an internal atmosphere of lower O₂and higher CO₂compared with unsealed and uncoated controls. At high temperature respiration rate was found to increase more highly compared with peel permeability, which in some cases decreased with temperature. Thus high temperature storage of some coated fruits induced very low O₂and high CO₂internal concentrations with high accumulation levels of ethanol in juice. Compared with (ate harvesting variety of thick peel, early harvesting variety with thin peel showed higher peel permeability, and had lower possibility of anaerobic disorders due to internal atmosphere of low O₂and high CO₂concentrations beyond tolerance limit. Selection of sealing and coating application needs simultaneous consideration of peel permeability and respiration rate, which depend on variety type, temperature and treatment.
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