A Presentation Agent For Multilingual Services

Kim, Hong Yoon; Lee, Kyoon Ha

doi:10.1109/noms.1994.644158

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“…However, applications of chitosan are limited by its low solubility in general solvents [3]. Chitosan is always chemically modified to its derivatives to get biomaterials with better bioactivities [4]. Carboxyalkylation is one of the most popular ways to enhance chitosan's solubility.…”

Section: Introductionmentioning

confidence: 99%

Chitosan Pyruvic Acid Derivatives: Preparation, Moisture Absorption-Retention Ability and Antioxidative Activity

Wang¹,

Yin²,

et al. 2007

KEM

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Chitosan pyruvic acid derivatives was successfully prepared from chitosan and pyruvic acid under reducing conditions, via aldimine formation. The chemical structure of the derivatives was proved by 13C NMR and IR. It was found ratio between glucose residues and pyruvic acid, reaction time, pH, and molecular weight of original chitosan had great influence on the degree of substitution (DS). N-(1-carboxyethyl) chitosan (N-CE-CTS) showed similar moisture absorption-retention curve and ability with HA, and much better ability than the original chitosan. Hydroxyl radical scavenging ratio of 4g/L chitosan and N-CE-CTS was 35.0% and 41.7%, respectively.

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Section: Introductionmentioning

confidence: 99%