The Crystallinity and the Grain distribution of Chitin

Abstract

The chitin is a raw material of N-acetylglucosamine. We proposed the process of manufacturing it with few negative environmental impacts. The process of manufacture that used the hydrochloric acid was used so far. Our method is characterized by the combining crushing with the saccharification method with the enzyme. In this method, the quality rating of the powder by crushing becomes an important point. The presumption accuracy of the degree of crystallinity that used the near-infrared spectrum was able to be improved more by using the genetic algorithm-PLS (GA-PLS). This is a prediction model by the variable selection by GA and the application of PLS regression models. The degree of crystallinity of sample powders were measured by XRD, beforehand. Moreover, the examination of the presumption of the particle size distribution is advanced.