Effect of homogenization-pressure-assisted enzymatic hydrolysis on the structural and physicochemical properties of lotus-seed starch nanoparticles.

Effect of homogenization-pressure-assisted enzymatic hydrolysis on the structural and physicochemical properties of lotus-seed starch nanoparticles. Int J Biol Macromol. 2020 Nov 18;: Authors: Wang B, Lin X, Zheng Y, Zeng M, Huang M, Guo Z Abstract In previous studies, we successfully prepared lotus-seed starch nanoparticles (LS-SNPs) using enzymatic methods. To further improve their performance, we studied the structural, physical and chemical properties of LS-SNPs prepared by high-pressure homogenization (HPH)-assisted enzymatic hydrolysis (EH). HPH treatments at different pressures and frequencies have a significant effect on the particle size and molecular weight of LS-SNPs. Structural analyses showed that LS-SNP and H-LS-SNP both comprised B-type starch crystals. As the homogenization pressure and frequency were increased, the relative crystallinity of H-LS-SNP first increased and then decreased, indicating that HPH treatment affected the double-helix structure of LS-SNPs. The results also show that moderate HPH treatment was beneficial for enzymatic hydrolysis, but when the HPH treatment was further increased, it destroyed the ordered structure of LS-SNPs. Our research showed that H-LS-SNPs with the smallest particle size and the highest crystallinity were obtained under pressure of 150 MPa, a homogenization frequency of five times the original, and a material-to-liquid ratio of 3%. The results indicate that HHP-assisted EH i...
Source: International Journal of Biological Macromolecules - Category: Biochemistry Authors: Tags: Int J Biol Macromol Source Type: research