• Journal of agriculture & life science
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• v.53 no.6
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• pp.109-118
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• 2019

Effects of hybrid decompressor heat pump dryer in processing and storage stability of oysters was investigated. Dried oyster samples were stored at -20℃ for eight weeks and changes in physicochemical characteristics, nutritional and microbial content, and bioactivity were evaluated. Total aerobic plate count in dried oyster samples (L1-1, L1-3, and R2-2), after storage, were found safer at 18~19×10³ CFU/g than that of commercial (CD-1) products at 27~30×10³ CFU/g. DHA levels were higher in L1-1, L1-3, and R2-2 (17.87%, 17.46%, 17.89%, respectively) than in CD-1 (15.41%). Meanwhile EPA levels (13.20~16.87%) and total free amino acids (1325.2~1260.4 mg/100g) slightly varied among samples. K-values were found highest in CD-1 (34~42.1%) sample which indicated great decrease in freshness.