オキアミの黒変化防止の一工夫

概要

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Raw krills (Euphausia superba) were sealed with nitrogen gas in bags which were made of five kinds of membranes with different oxygen permeability (Po2 of 0.9, 1.0, 157, >2000** and >2000** ml/m2/24hr/atm at 35°). Their bags were allowed to stand or gently shaken at 20° or 38°, and the production of dark colour in krills was observed. After 72 hr, krills in the bags with Po2 of more than 2000 visibly darkened, while those in the bags of Po2 of 0.9 and 1.0 showed no change in colour. Krills in the bag with Po2 of 157 gradually darkened when the bag was shaken for more than 24 hr. These results show that darkening in colour of raw krills is prevented by avoiding the contact with oxygen in atmosphere. This method will be applied to transportation and preservation of raw krills without their darkening.
社団法人日本農芸化学会の論文