title: Effect of the characters of chitosans used and regeneration conditions on the yield and physicochemical characteristics of regenerated products.
abstract: The objective of this study was to explore the effect of the character of chitosans used, and the regeneration conditions employed on, the yield and physicochemical characteristics of regenerated products. Different concentrations of acetic acid were used to dissolve chitosans of 61.7% and 94.9% degree of deacetylation (DD), and weight-average molecular weight (Mw) of 176 and 97 kDa, respectively; they were then precipitated with an 8 N NaOH solution, followed by washing and neutral and freeze drying to get the regenerated products. Yields of regenerated products and their physicochemical properties, such as ash content, bulk density, Mw, polydispersity index (PDI), DD, and crystallinity were measured. A higher concentration of acetic acid used resulted in a higher yield. The purity of the regenerated product increased significantly, whereas the bulk density and crystallinity decreased significantly after regeneration. The regeneration process showed its merits of narrowing down the PDI of regenerated products. The DD and structure of chitosan was changed insignificantly after the regeneration process.
authors.affiliation: Department of Food Science, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan. chuhsi@mail.ypu.edu.tw.|Department of Food and Beverage Management, Yuanpei University of Medical Technology, 306, Yuanpei Street, Hsinchu 30015, Taiwan. chuhsi@mail.ypu.edu.tw.
authors.forename: Chu Hsi
authors.initials: CH
authors.lastname: Hsu
authors.affiliation: Department of Food Science, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan. skyskchen@gmail.com.
authors.forename: Szu Kai
authors.initials: SK
authors.lastname: Chen
authors.affiliation: Department of Food Science, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan. walkergky@yahoo.com.tw.
authors.forename: Wei Yu
authors.initials: WY
authors.lastname: Chen
authors.affiliation: Department of Food Science, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan. tml@mail.ntou.edu.tw.
authors.forename: Min Lang
authors.initials: ML
authors.lastname: Tsai
authors.affiliation: Department of Food Science, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan. chenrhntou@gmail.com.
authors.forename: Rong Huei
authors.initials: RH
authors.lastname: Chen
mesh_terms: D019342:Acetic Acid / Q000737:chemistry; D000107:Acetylation; D048271:Chitosan / Q000737:chemistry* / Q000302:isolation & purification; D008970:Molecular Weight; D012996:Solutions
chemical_list: D012996:Solutions; D048271:Chitosan; D019342:Acetic Acid