N. G. Bazarnova

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Ozonation has been considered as a method for the pretreatment of plant biomass to obtain cellulose and monosaccharides. Ozone consumption by aspen wood with various moisture contents has been investigated. We have considered the gradual transformation of the substrate: wood to ozonated wood to cellulose-containing product (CP) to holocelluloze (HC) and to(More)
The influence of the composition of solutions of peracetic acid on a change in the characteristics of cellulose during the oxidative-hydrolytic destruction of aspen and pine wood under microwave radiation was investigated. Samples of the prepared cellulose were characterized by viscometry, X-ray diffraction and IR spectroscopy. It was found that the main(More)
Pretreatment of pine wood in a mixture containing acetic acid, hydrogen peroxide, water, and catalyst has been performed in order to minimize wood component destruction and analyze the behavior of the principal components of pine wood upon carboxymethylation. The effects of catalysts (sulfuric acid or ammonium molybdate) and the characteristics of the(More)
The use of microwave radiation was proposed for the intensification of the pine wood carboxymethylation process performed without prior separation into individual components. To obtain the carboxymethylated pine wood in the form of potassium salt, the pine wood was treated with potassium hydroxide and monochloroacetic acid in 2-propanol media. The(More)
Quantitative express analysis of nitrogen content in cellulose nitrates by Fourier transform infrared spectroscopy has been developed. The slope of the dependence of the ratio of the band intensity (and area) to sample weight in a tablet, on the nitrogen content in a sample was used to find the reduced extinction coefficients for quantitative analysis of(More)
The heterogeneity of various cellulose samples was characterized by methods of thermomechanical spectroscopy, turbidimetric titration of cadoxene solutions, and viscosimetry. The correspondence in the values of molecular masses and fractional composition evaluated by different methods was observed for cellulose isolated from wood. Along with traditional(More)
In the last decade, the use of a microwave radiation in the chemistry of plant raw materials has attracted the attention of a growing number of scientists. This review is devoted to an analysis of recent publications in this area, the number of which is exponentially increased. The main fields of application of microwave radiation in the chemistry and(More)
The carboxymethylation of pine and aspen wood in different solvents has been performed using microwave radiation. Products with a content of carboxymethyl groups of 4.6–25.9% have been obtained. It was found that the exposure to microwave radiation substantially diminishes the time of carboxymethylation (≈200 times). From carboxymethylated wood obtained(More)
A component, chemical and morphological composition of wood of the Howea fosteriana palm and the Cereus peruvians cactus and the wood stem of the Dracaena sanderiana was studied. The supramolecular structure and the physicochemical properties of cellulose samples which were extracted from the wood species were examined by wide-angle X-ray scattering,(More)
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