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N-Acetyl group distribution in partially deacetylated chitins prepared under homogeneous conditions

✍ Scribed by Hitoshi Sashiwa; Hiroyuki Saimoto; Yoshihiro Shigemasa; Seiichi Tokura

Book ID
102990328
Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
399 KB
Volume
242
Category
Article
ISSN
0008-6215

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✦ Synopsis

The distribution of N-acetyl group in partially deacetylated chitin (DA-chitin) was investigated by nitrous acid deamination. Most deamination products of various DA-chitins (over 50% of deacetylation), prepared under homogeneous conditions, were oligomers of less than six units. These results would suggest a random distribution of N-acetyl groups in the DA-chitin molecule.

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Determination of the degree of N-acetylation and the distribution of N-acetyl groups in partially N-deacetylated chitins (chitosans) by high-field n.m.r. spectroscopy
✍ Kjell M. Vårum; Marit W. Antohonsen; Hans Grasdalen; Olav Smidsrød 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 452 KB

The composition and sequence of 2-acetamido-2-deoxy-beta-D-glucose (GlcNAc) and 2-amino-2-deoxy-beta-D-glucose (GlcN) residues in partially N-deacetylated chitosans, prepared under homogeneous and heterogeneous conditions, have been determined by 1H-n.m.r. spectroscopy. It was necessary to depolymer