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Gamma‐Irradiation of Frozen Kiwifruit Pulp
Author(s) -
LODGE N.,
HOGG M. G.,
FLETCHER G. C.
Publication year - 1985
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1985.tb10447.x
Subject(s) - actinidia deliciosa , irradiation , chemistry , pulp (tooth) , gamma irradiation , food science , ascorbic acid , cold storage , food preservation , horticulture , biology , dentistry , medicine , physics , nuclear physics
Frozen (–18°C) de‐seeded kiwifruit pulp (Actinidia deliciosa) was irradiated at a dose of 100 krad and stored at ‐18°C. Irradiation resulted in a 2.11 log 10 reduction in aerobic plate count (APC) with bacteria being most susceptible. Molds were less susceptible than yeasts. Assessments carried out over 6 months storage showed no significant differences in physical, chemical and sensory properties between irradiated and nonirradiated pulps. The microbial populations of the pulps decreased in parallel throughout the storage period. Frozen storage without irradiation resulted in a 3 log 10 reduction in APC over the 6 months period, a 38% reduction in ascorbic acid, and a slight loss of color. Three days frozen storage (– 18°C) following irradiation resulted in an APC only 0.89 log 10 higher than 6 months frozen storage (‐ 18°C) without irradiation with potential savings in energy and holding times which could have economic benefits.