Gan Jing, Guan Chenxia, Zhang Xiaoyu, Sun Lirong, Zhang Qinling, Pan Shihui, Zhang Qian, Chen Hao
College of Life Science, Yantai University, Yantai 264000, China.
Marine College, Shandong University, Weihai 264209, China.
Polymers (Basel). 2022 Jul 22;14(15):2980. doi: 10.3390/polym14152980.
Mycosporine-like amino acids (MAAs) are ultraviolet-absorbing compounds and have antioxidant functions. In this paper, MAAs were added into fish gelatin/sodium alginate films as an anti-ultraviolet additive. The effects of 0-5% MAAs (, MAAs/fish gelatin) on the physical properties, antioxidant properties, antibacterial properties and anti-ultraviolet properties of fish gelatin/sodium alginate films were investigated. The results suggest that the content of the MAAs influenced the mechanical properties. The water content, swelling and water vapor permeability of the films were not altered with the addition of MAAs. In addition, the composite films showed effective antioxidant activity and antimicrobial activity. The incorporation of MAAs significantly improved the DPPH radical scavenging activity of the films from 35.77% to 46.61%. Moreover, the block ultraviolet rays' ability was also greatly improved when the film mixed with the MAAs and when the value of the light transmission was 0.6% at 350 nm. Compared with the pure composite film, the growth of covered by the composite film with 3.75% and 5% MAAs exhibited the best survival rate. These results reveal that MAAs are a good film-forming substrate, and MAAs have good potential to prepare anti-ultraviolet active films and antioxidant active films for applications. Overall, this project provides a theoretical basis for the study of active composite films with anti-ultraviolet activities, and it provides new ideas for the application of MAAs.
类菌孢素氨基酸（MAAs）是具有紫外线吸收功能的化合物，且具备抗氧化作用。在本文中，MAAs作为抗紫外线添加剂被添加到鱼明胶/海藻酸钠薄膜中。研究了0 - 5%的MAAs（MAAs/鱼明胶）对鱼明胶/海藻酸钠薄膜的物理性能、抗氧化性能、抗菌性能和抗紫外线性能的影响。结果表明，MAAs的含量会影响机械性能。添加MAAs后，薄膜的含水量、溶胀度和水蒸气透过率并未改变。此外，复合薄膜表现出有效的抗氧化活性和抗菌活性。MAAs的加入显著提高了薄膜的DPPH自由基清除活性，从35.77%提高到46.61%。而且，当薄膜与MAAs混合且在350 nm处的透光率为0.6%时，其阻挡紫外线的能力也得到了极大提高。与纯复合薄膜相比，含有3.75%和5% MAAs的复合薄膜覆盖下的[具体菌种未明确]生长表现出最佳的存活率。这些结果表明，MAAs是一种良好的成膜基质，在制备抗紫外线活性薄膜和抗氧化活性薄膜方面具有良好的应用潜力。总体而言，该项目为抗紫外线活性复合薄膜的研究提供了理论依据，并为MAAs的应用提供了新思路。
