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Vol. 15 (2012 year), No. 1
Dolgopyatova N.V., Novikov V.Yu., Konovalova I.N., Shoshina E.V., Zotova K.V.
Improving the technology of glucosamine production from crabmeat chitin
The influence of preliminary acetylated chitin on output of D(+)-Glucosamine hydrochloride has been shown. Mechanism of chitin degradation and the mathematical model adequately describing this process have been proposed. The technology of glucosamine hydrochloride production from preliminary acetylated crab chitin has been improved.
(in Russian, стр.6, fig. 3, tables. 2, ref 13, Adobe PDF, Adobe PDF 0 Kb)
Vol. 15 (2012 year), No. 1
Kuchina Yu.A., Dolgopyatova N.V., Novikov V.Yu., Sagaidachny V.A., Morozov N.N.
Instrumental methods of determining the degree of chitin deacetylation
The overview of methods for determination the chitin and chitosan deacetylation degree has been carried out. The optical density of chitosan samples with different molecular weight in the infrared has been defined. The comparative results of measuring chitin deacetylation degree by the method of infrared spectroscopy and using registration of chitin acid hydrolysis product by the liquid chromatography method have been given.
(in Russian, стр.7, fig. 6, tables. 2, ref 16, Adobe PDF, Adobe PDF 0 Kb)
Vol. 16 (2013 year), No. 3
Reut K.V., Dolgopyatova N.V., Novikov V.Yu., Putintsev N.M., Konovalova I.N., Kuchina Yu.A.
Optical activity and spectrophotometric characteristics of chitosan solutions obtained from the Kamchatka crab and the Arctic shrimp
The size of specific optical rotation of chitosan solutions has been shown to depend on nucleophilicity of hydrolyzing agent, it grows in absolute value with increase of quantities of trailer glycosidic centers in chitosan solution; the chitosan deacetylation degree practically does not influence on the size of specific optical rotation. For chitosan from chitin of the Kamchatka crab and the Arctic shrimp identical laws of influence of molecular weight and deacetylation degree on the size of specific optical rotation have been obtained. Influence of phosphoric acid on conformational transformations trailer glycosidic centres of chitosan molecules has been defined.
(in Russian, стр.6, fig. 6, tables. 2, ref 12, Adobe PDF, Adobe PDF 0 Kb)