| Id |
Subject |
Object |
Predicate |
Lexical cue |
| TextSentencer_T1 |
0-167 |
Sentence |
denotes |
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. |
| TextSentencer_T2 |
168-438 |
Sentence |
denotes |
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. |
| TextSentencer_T3 |
439-545 |
Sentence |
denotes |
It was necessary to depolymerise the chitosan slightly by treatment with nitrous acid before spectroscopy. |
| TextSentencer_T4 |
546-682 |
Sentence |
denotes |
A sequence-dependent deshielding of H-1 of the GlcNAc residues made it possible to determine the proportions of the four possible diads. |
| TextSentencer_T5 |
683-865 |
Sentence |
denotes |
Chitosan prepared by N-deacetylation under homogeneous conditions gave values for the diad frequencies that were roughly consistent with a random distribution of the N-acetyl groups. |
| TextSentencer_T6 |
866-1018 |
Sentence |
denotes |
Samples prepared under heterogeneous conditions have a frequency of the GlcNAc-GlcNAc diad slightly higher than for a random (Bernoullian) distribution. |
| TextSentencer_T7 |
1019-1159 |
Sentence |
denotes |
The chitosans, prepared under both homogeneous and heterogeneous conditions, with a degree of acetylation of 50% were soluble at neutral pH. |
| T1 |
0-167 |
Sentence |
denotes |
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. |
| T2 |
168-438 |
Sentence |
denotes |
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. |
| T3 |
439-545 |
Sentence |
denotes |
It was necessary to depolymerise the chitosan slightly by treatment with nitrous acid before spectroscopy. |
| T4 |
546-682 |
Sentence |
denotes |
A sequence-dependent deshielding of H-1 of the GlcNAc residues made it possible to determine the proportions of the four possible diads. |
| T5 |
683-865 |
Sentence |
denotes |
Chitosan prepared by N-deacetylation under homogeneous conditions gave values for the diad frequencies that were roughly consistent with a random distribution of the N-acetyl groups. |
| T6 |
866-1018 |
Sentence |
denotes |
Samples prepared under heterogeneous conditions have a frequency of the GlcNAc-GlcNAc diad slightly higher than for a random (Bernoullian) distribution. |
| T7 |
1019-1159 |
Sentence |
denotes |
The chitosans, prepared under both homogeneous and heterogeneous conditions, with a degree of acetylation of 50% were soluble at neutral pH. |