Results 361 to 370 of about 174,598 (410)

Chitin and chitosan nanofibers: electrospinning of chitin and deacetylation of chitin nanofibers

Polymer, 2004
Abstract An electrospinning method was used to fabricate chitin nanofibous matrix for wound dressings. Chitin was depolymerized by gamma irradiation to improve its solubility. The electrospinning of chitin was performed with 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) as a spinning solvent.
Jung Nam Lim, Young You, Pil Hyun Kang, Won Ho Park, Taek Seung Lee, Byung-Moo Min, Sung Won Lee   +6 more
openaire   +2 more sources

Polyphenol-mediated chitin self-assembly for constructing a fully naturally resourced hydrogel with high strength and toughness.

Materials Horizons, 2021
Natural polymeric hydrogels are expected to serve as potential structural biomaterials, but, most of them are usually soft and fragile. Herein, a polyphenol-mediated self-assembly (PMS) strategy was developed to significantly enhance the chitin hydrogel ...
Xinghuan Lin, Lina Zhang, Bo Duan
semanticscholar   +1 more source

The structure of chitin

Biochimica et Biophysica Acta, 1962
The structure factors for the various reflections of α-chitin have been calculated for both the structures of Carlstrom and of Dweltz. Comparison with observation does not indicate the definite superiority of one over the other, although Carlstrom's structure seems to be better from stereochemical considerations.
C. Ramakrishnan, G. N. Ramachandran
openaire   +3 more sources

Thermal characteristics of chitin and hydroxypropyl chitin

Polymer, 1994
Abstract The thermal properties of chitin and hydroxypropyl chitin (HPCH) were examined. Hydroxypropyl chitin was prepared from chitin and propylene oxide. The structure of HPCH was confirmed by solid-state 13 C nuclear magnetic resonance and Fourier-transform infra-red spectroscopy. From the results of elemental analysis, the degree of substitution
Seon Jeong Kim, Yoon Duk Moon, Young Moo Lee, Seong Soo Kim   +3 more
openaire   +2 more sources

Shrimp chitin as substrate for fungal chitin deacetylase

Applied Microbiology and Biotechnology, 2001
The fungal chitin deacetylases (CDA) studied so far are able to perform heterogeneous enzymatic deacetylation on their solid substrate, but only to a limited extent. Kinetic data show that about 5-10% of the N-acetyl glucosamine residues are deacetylated rapidly. Thereafter enzymatic deacetylation is slow.
W. F. Stevens, N N Win
openaire   +2 more sources

Bioconversion of chitin into chitin oligosaccharides using a novel chitinase with high chitin-binding capacity

International Journal of Biological Macromolecules, 2023
Chitin is the second largest renewable biomass resource in nature, it can be enzymatically degraded into high-value chitin oligosaccharides (CHOSs) by chitinases. In this study, a chitinase (ChiC8-1) was purified and biochemically characterized, its structure was analyzed by molecular modeling.
Qiong, Zhao, Liqiang, Fan, Chen, Deng, Chunyu, Ma, Chunyue, Zhang, Liming, Zhao   +5 more
openaire   +2 more sources

Enzymatic degradation of chitins and partially deacetylated chitins

International Journal of Biological Macromolecules, 1994
The enzymatic (lysozyme, chitinase etc.) digestibility of chitins obtained from squid pen and shrimp shell, and of partially deacetylated chitins (DA-chitins) was investigated. The digestibility of various chitins by the chitinase from Bacillus sp. PI-7S was much higher than that by lysozyme, and beta-chitin was digested more smoothly than alpha-chitin.
Kazuo Saito, Hitoshi Sashiwa, Yoshihiro Shigemasa, Hiroyuki Saimoto   +3 more
openaire   +3 more sources

On chemistry of γ-chitin

Carbohydrate Polymers, 2017
The biological material, chitin, is present in nature in three allomorphic forms: α, β and γ. Whereas most studies have dealt with α- and β-chitin, only few investigations have focused on γ-chitin, whose structural and physicochemical properties have not been well delineated. In this study, chitin obtained for the first time from the cocoon of the moth
Lalehan Akyuz, Talat Baran, Jalel Labidi, Hermann Ehrlich, Murat Kaya, Chris T. Amemiya, Idris Sargin, Roberta Galli, Asier M. Salaberria, Muhammad Mujtaba   +9 more
openaire   +5 more sources

Cellulose and chitin esters, and the reactivity of cellulose and chitin [PDF]

Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1961
On comparison of the reactivities of chitin and cellulose in their conversion into ethers and esters it is found that chitin is considerably less reactive than cellulose, which is to be attributed to a difference in the internal active surfaces.
É. A. Pyaivinen, S. N. Danilov, E. A. Plisko   +2 more
openaire   +1 more source

Chitin and Chitosan Fragments Responsible for Plant Elicitor and Growth Stimulator.

Journal of Agricultural and Food Chemistry, 2020
Chitin and chitosan are natural polysaccharides with huge application potential in agriculture, such as promoting plant growth, eliciting plant resistance against biotic and abiotic stress, and activating symbiotic signaling between plants and beneficial
Kecheng Li, R. Xing, Song Liu, Pengcheng Li   +3 more
semanticscholar   +1 more source