Polymorphic Modifications of Chitosan

Baklagina Y. G.; Klechkovskaya V. V.; Kononova S. V.; Petrova V. A.; Poshina D. N.; Orekhov A. S.; Skorik Y. A.

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Polymorphic Modifications of Chitosan

机译：壳聚糖的多态性修饰

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This work describes the analysis of the crystal structures of chitosan, its main polymorphic modifications, and its characteristic mutual chain packing and hydrogen bond systems in the crystalline regions of conformers. The analysis takes into consideration the crystal structures of chitosan complexes (salts) with organic and inorganic acids and their structural transformations. Notably, the transformation of the hydrated form of chitosan into anhydrous is found to be irreversible and occurs either at high temperatures or through a less stable form of hydrated salts. The interaction with polyanions during the formation of multilayer films can be considered as a way to form the anhydrous crystalline form of chitosan.

机译：本作品描述了壳聚糖，其主要多态性修饰及其特征互连包装和氢键系统在晶体区域的晶体区域中的晶体结构分析。分析考虑了用有机和无机酸及其结构转化的壳聚糖配合物（盐）的晶体结构及其结构转化。值得注意的是，发现壳聚糖水合形式的壳聚糖转化为无水的，是不可逆的，并且在高温下或通过不太稳定的水合盐形式发生。在形成多层膜期间与多层膜的相互作用可以被认为是形成壳聚糖的无水晶体形式的一种方法。

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来源
《Crystallography reports》 |2018年第3期|共11页
作者
Baklagina Y. G.; Klechkovskaya V. V.; Kononova S. V.; Petrova V. A.; Poshina D. N.; Orekhov A. S.; Skorik Y. A.;
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作者单位

Russian Acad Sci Inst Macromol Cpds St Petersburg 199004 Russia;

Russian Acad Sci Shubnikov Inst Crystallog Fed Sci Res Ctr Crystallog &

Photon Moscow 119333 Russia;

Russian Acad Sci Inst Macromol Cpds St Petersburg 199004 Russia;

Russian Acad Sci Inst Macromol Cpds St Petersburg 199004 Russia;

Russian Acad Sci Inst Macromol Cpds St Petersburg 199004 Russia;

Russian Acad Sci Shubnikov Inst Crystallog Fed Sci Res Ctr Crystallog &

Photon Moscow 119333 Russia;

Russian Acad Sci Inst Macromol Cpds St Petersburg 199004 Russia;

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正文语种 eng
中图分类晶体学;
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1. Polymorphic Modifications of Chitosan [J] . Baklagina Y. G., Klechkovskaya V. V., Kononova S. V., Crystallography reports . 2018,第3期

机译：壳聚糖的多态性修饰
2. Modification of genetic regulation of a heterologous chitosanase gene in Streptomyces lividans TK24 leads to chitosanase production in the absence of chitosan [J] . Marie-Pierre Dubeau, Isabelle Guay, Ryszard Brzezinski Microbial Cell Factories . 2011,第1期

机译：Lividans TK24中异源壳聚糖酶基因遗传调控的修饰导致在没有壳聚糖的情况下产生壳聚糖酶
3. Chemical modification of chitosan. Part 15: synthesis of novel chitosan derivatives by substitution of hydrophilic amine using N-carboxyethylchitosan ethyl ester as an intermediate [J] . Hitoshi Sashiwa, Norioki Kawasaki, Atsuyoshi Nakayama, Carbohydrate research . 2003,第6期

机译：壳聚糖的化学修饰。第15部分：以N-羧乙基壳聚糖乙酯为中间体，通过亲水胺的取代合成新型壳聚糖衍生物
4. Modification of Chitosan and Its Effect on Chitosan/Montmorillonite Nanocomposites [C] . Xuejiao Liu, Yi Jing 第五届制浆造纸新技术国际研讨会（ISETPP）暨第三届国际造纸与环境学术大会（IPEC）论文集 . 2016

机译：壳聚糖的改性及其对壳聚糖/蒙脱土纳米复合材料的影响
5. Dentin Substrate Modification with Chitosan-Hydroxyapatite Precursor Nanocomplexes [D] . Hashmi, Anam . 2019

机译：壳聚糖-羟基磷灰石前体纳米复合物对牙本质的修饰
6. Modification of genetic regulation of a heterologous chitosanase gene in Streptomyces lividans TK24 leads to chitosanase production in the absence of chitosan [O] . Marie-Pierre Dubeau, Isabelle Guay, Ryszard Brzezinski 2011

机译：变青链霉菌TK24中异源壳聚糖酶基因的遗传调控的修饰导致在不存在壳聚糖的情况下产生壳聚糖酶
7. TO COMPARE THE EFFECT OF CHITOSAN, LIFESTYLE MODIFICATION, AND COMBINATION OF CHITOSAN AND LIFESTYLE MODIFICATION ON BODY MASS INDEX IN OBESE PATIENTS [O] . 2019

机译：比较壳聚糖，生活方式改性和壳聚糖和生活方式改性对肥胖患者体重指数的影响

Polymorphic Modifications of Chitosan

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