The effects of UV-C irradiation on the enzymatic properties of main endogenous enzymes in shrimp head of Litopenaeus vannamei were studied. The homogenized shrimp head was irradiated with 30 W UV-C ultraviolet lamp at a height of 20 cm for 20 min. The effects of temperature and pH on the activities of endogenous enzymes before and after irradiation were analyzed and compared. The optimum pH of lipase and chitinase changed before and after UV-C irradiation, as the optimum pH of lipase changed from 10 to 6-10, and the optimum pH of chitinase changed from 5 to 6. The optimum temperature of the main endogenous enzymes did not change significantly. After UV-C irradiation and under the optimum conditions, the activities of acid protease, alkaline protease, lipase, chitinase and PPO increased by 23.99%, 37.49%, 21.37%, 37.70% and 46.52%, respectively. Therefore, it was concluded that UV-C irradiation can activate the main endogenous enzymes in Litopenaeus vannamei head.
WANG He
,
CAO Wenhong
,
ZHANG Chaohua
,
QIN Xiaoming
,
ZHENG Huina
,
GAO Jialong
. Effects of UV-C irradiation on enzymatic properties of main endogenous enzymes in the head of Litopenaeus vannamei[J]. Food and Fermentation Industries, 2019
, 45(19)
: 32
-37
.
DOI: 10.13995/j.cnki.11-1802/ts.021139
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