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Journals and Conferences
h. Under these conditions, the phytin was converted quantitatively into phosphate, and a crystalline precipitate of CaSO~ deposited from the acid solution. When the acid solution was neutralized with 25% ammonia to pH 8.0-9.0, a microcrystalline precipitate of phosphate (AgNO3) deposited. The IR spectra of the phosphate obtained on the cooking of rice flour… (More)
Quantitative 13C NMR spectroscopy has been used to study the chemical structure of industrial kraft lignin, obtained from softwood pulping, and its nitrosated derivatives, which demonstrate high inhibition activity in the polymerization of unsaturated hydrocarbons.
General and comparative characteristics obtained by1H and13C NMR spectroscopy of the lignins from aqueous ethanolic cooks are presented. It is shown that degradation of the lignin macromolecule takes place during the digestion of aspen wood. The mean length of the lignin side chains decreases and ether bonds are cleaved, while the degree of condensation of… (More)