Journal ArticleDOI
Radiation-chemical degradation of cellulose and other polysaccharides
TLDR
In this article, the potential of using radiation-chemical methods for processing of cellulose and other polysaccharides in industry and agriculture has been considered, and a mechanism of the radiationchemical transformations of celluloses and other other polyscharides is suggested.Abstract:
Results of studies on the radiation-chemical transformations of cellulose, its ethers, and some other polysaccharides (xylan, starch, dextran, chitin, chitosan, and heparin) are discussed. Ionising radiation causes the degradation of these compounds accompanied by decomposition of the pyranose ring and formation of compounds with carbonyl and carboxy groups, as well as formation of hydrogen, carbon dioxide, and carbon monoxide. The efficiency of degradation increases considerably with temperature and depends on the structure of the polysaccharide and the nature of its substituents. A mechanism of the radiation-chemical transformations of cellulose and other polysaccharides is suggested. The prospects of using radiation-chemical methods for processing of cellulose and other polysaccharides in industry and agriculture are considered. The bibliography includes 213 references.read more
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Radiation-induced grafting of cellulose for adsorption of hazardous water pollutants: A review
TL;DR: The radiation chemistry of cellulose, the different grafting techniques used, and the methods of characterization of the grafted material are discussed in this article. And the application of the grafting polymer for the removal of water pollutants and regeneration of the adsorbent is discussed.
Patent
Processing biomass and petroleum containing materials
TL;DR: In this paper, the authors describe a system that uses feedstock materials, such as cellulosic and/or lignocellulosic materials and starchy materials, to produce ethanol or butanol by fermentation.
Journal ArticleDOI
Radiation crosslinking of carboxymethylcellulose of various degree of substitution at high concentration in aqueous solutions of natural pH
TL;DR: Carboxymethylcellulose(CMC) is an anionic linear polymer in which original H atoms of cellulose hydroxyl groups are replaced by carboxy methyl substituent as discussed by the authors.
Journal ArticleDOI
The biological interpretation of metabolomic data can be misled by the extraction method used
Xavier Duportet,Xavier Duportet,Raphael B. M. Aggio,Sónia Carneiro,Sónia Carneiro,Silas G. Villas-Boas +5 more
TL;DR: The results show that different solvent-based extraction methods can yield significantly different metabolite profiles, which impact substantially in the biological interpretation of metabolomics data.
Journal ArticleDOI
Electron Beam Irradiation of Cellulosic Materials-Opportunities and Limitations.
TL;DR: Degradation of the analyzed substrates was the predominant result of the irradiation; however, in the microcrystalline samples, oxidized cellulose functionalities were introduced along the cellulose chain, making this substrate suitable for further chemical modification.
References
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Journal ArticleDOI
Electron spin resonance studies of transient alkyl radicals
TL;DR: In this article, the ESR lines are found to be narrow; considerable fine structure is observable, permitting positive assignment of the radical species, and accurate hyperfine constants are reported for 21 alkyl and cycloalkyl radicals, including several deuterated species.
Journal ArticleDOI
Radiation Damage in Organic Crystals. II. Electron Spin Resonance of (CO2H)CH2CH(CO2H) in β-Succinic Acid
TL;DR: In this paper, an analysis of the electron spin resonance of x-irradiated single crystals of β-succinic acid was performed and it was shown that the principal long-lived paramagnetic species produced by the radiation damage is (CO2H)CH2-H(CO 2H)