Chemical functionalization of cellulose aims to adjust the properties of macromolecule for different purposes, particularly, as a chemical feedstock for production of cellulose derivatives for a variety of applications. The conventional sources of cellulose include cotton linters and wood pulp which now-a-days are discouraged on account of the cost of the former and environment conservative reg...

A novel method for D-glucose (D-Glu) and trimethylammonium chloride immobilization onto the surface of cellulose powder was studied. Cellulose powder was grafted with vinyl monomer glycidyl methacrylate (GMA), using ceric ammonium nitrate as an initiator, and further derived with quaternary ammonium groups to build the D-GluN-type cellulose absorbent (Cell-g-GMA-D-GluN). Epoxy cellulose was fou...

In vivo cellulose ribbon assembly by the Gram-negative bacterium Acetobacter xylinum can be altered by incubation in carboxymethylcellulose (CMC), a negatively charged water-soluble cellulose derivative, and also by incubation in a variety of neutral, water-soluble cellulose derivatives. In the presence of all of these substituted celluloses, normal fasciation of microfibril bundles to form the...

Esterification of cellulose with subs t i tu ted or unsubs t i tu ted benzoic acids in t he system of pyridine containing methanesulfonyl chloride at various reaction conditions was investigated. Cellulose could be readily acylated with 2-nitro-, 3-nitro-, 4-nitro-, and 4-azidobenzoic acids to form: 0-(2nitrobenzoyl)cellulose (DS = 3), 0-(3-nitrobenzoyl)celhilose (DS = 3), 0-(4-nitrobenzoyl)cel...

The relaxation processes in cellulose, methyl cellulose, hydroxypropyl cellulose, and hydroxypropylmethyl cellulose were studied by dielectric spectroscopy. The dielectric spectra for these polysaccharides were measured in the frequency range from 100 Hz to 1 MHz and in the temperature range from 100 to 450 K. The dielectric relaxation data for cellulose, methyl cellulose, hydroxypropylmethyl c...

Xylanase A (XYLA) and arabinofuranosidase C (XYLC) from Pseudomonas fluorescens subsp. cellulosa are modular enzymes consisting of discrete cellulose-binding domains (CBDs) and catalytic domains joined by serine-rich linker sequences. To evaluate the role of the CBDs and interdomain regions, the capacity of full-length and truncated derivatives of the two enzymes, lacking either the linker sequ...

cellulose was applied as a reusable and green catalyst for the facile four-component synthesis of 6-amino-4-aryl-3-methyl-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile derivatives using hydrazine monohydrate, ethyl acetoacetate, malononitrile and aryl aldehydes, under solvent-free and thermal conditions. the use of non-toxic and inexpensive catalyst, short reaction time, clean work-up and goo...

an efficient synthesis of some novel coumarin derivatives via 1, 4- michael addition of indole to coumarin chalcones catalyzed by cellulose sulphonic acid (csa) under solvent free conditions is described. the corresponding michael addition products were obtained in good to excellent yield. the synthesized compounds were screened for their antibacterial activity against e. coli, s. aureus and an...

Studies on nucleic acid metabolism often require the analytical separation of nucleic acid derivatives and are facilitated by chromatographic methods which are rapid and convenient. Column chromatography on ion exchange resins (1)) paper chromatography (2)) and paper electrophoresis (3) are among the methods used routinely for such separations. Even though these techniques have been employed wi...