The use of low molecular weight chitosan in biomedicine and agriculture requires the development of new environmentally friendly technology for its production. Combination of physical and chemical factors when using plasma in contact with a liquid makes it possible to fast and efficiently carry out the depolymerization process of chitosan. In this paper, we consider the possibility of using an AC underwater discharge for this problem in comparison to DC atmospheric pressure glow discharge. The structural characteristics of the obtained chitosan were investigated using X-ray and IR analyzes. The results showed that the molecular weight of chitosan decreases significantly for 4 min of the plasma treatment. The analysis of fractionation and detection of reactive oxygen and nitrogen species was carried out. The contributions of physical and chemical factors to the process of chitosan depolymerization have been estimated. In addition, research was carried out on the phytostimulating and elicitor activities of the water-soluble fraction of chitosan.

低分子量壳聚糖在生物医学和农业中的使用需要开发新的环保技术来生产。使用与液体接触的等离子体时物理和化学因素的结合使得可以快速有效地进行壳聚糖的解聚过程。在本文中，我们考虑了与直流大气压辉光放电相比，使用交流水下放电来解决这个问题的可能性。使用 X 射线和 IR 分析研究了所得壳聚糖的结构特征。结果表明，等离子体处理4 min后壳聚糖的分子量显着降低。进行了分馏分析和活性氧和氮的检测。估计了物理和化学因素对壳聚糖解聚过程的贡献。此外，还对壳聚糖水溶性部分的植物刺激和诱导剂活性进行了研究。