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- Title
短波紫外线结合发光二极管红光辐照对 香椿保鲜效果的影响.
- Authors
王雨萌; 曹文浩; 刘玉鑫; 路 昌; 王 磊; 陈庆敏; 石 瑜; 于 梅
- Abstract
Objective To compare the effects of short-wave ultraviolet C (UV-C) combined with light-emitting diode (LED) red light irradiation and single LED red light irradiation on postharvest preservation of Toona sinensis during storage. Methods The selected Toona sinensis was divided into 3 groups and stored at 4℃. The differences of different treatments were compared by measuring the sensory index, weight loss rate, color difference value, soluble solid content, vitamin C (VC) content, reducing sugar content, total bacterial count, malondialdehyde (MDA) content, free radical scavenging ability of 1,1-diphenyl-2-picrylhydrazyl (DPPH), peroxidase (POD) and polyphenol oxidase (PPO) activity indexes. Results After comparing treating results obtained from combined red light irradiation and single LED red light irradiation, it was found that: In terms of exterior quality, the former more significantly increased its sensory quality with 9.6 points higher score than the control, and it effectively reduced weight loss rate to only 52.5% of the control; and in terms of nutritional quality, the former maintained relatively higher content of soluble solids, VC and reducing sugar, of which its VC content was 11.1 fold of the control; the former not only more effectively suppressed microbial growth in Toona sinensis leaves, but also more significantly retarded accumulation of MDA, the content of which was only 72.3% of the control; the former also maintained higher DPPH free radical scavenging capacities, and also more significantly elevated POD and PPO activities, of which its PPO activity was 32.4% higher than that of control. Conclusion Both combined irradiation of UV-C and LED red light and single LED red light irradiation is beneficial to maintenance of storage qualities of Toona sinensis, preservation effects of combined UV-C and LED red light irradiation is preferable.
- Publication
Journal of Food Safety & Quality, 2023, Vol 14, Issue 4, p65
- ISSN
2095-0381
- Publication type
Article