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Lvova N. A. Ryazanova A. I. Popkov D. O. 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2020,94(2):415-422
Russian Journal of Physical Chemistry A - The results are presented from quantum-chemical modeling of the chemisorption of atomic hydrogen and fluorine on the surface of a hexagonal boron nitride... 相似文献
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L. S. Lussier C. Sandorfy H. OA L E-Thanh D. Vocelle 《Photochemistry and photobiology》1987,45(S1):801-808
Abstract— The Fourier-transform infrared spectra of chloroform-d solutions of conjugated imines CH3 CH=CHCH=NCH(CH3 )2 and CH3 CH2 CH=CHCH=CHCH=NCH(CH3 )2 and the related protonated species with HCl, HBr, HI, trichloro, dichloro, monobromo and monochloroacetic acids or propionic acid are presented. The effects of conjugation and protonation are examined. The results show that conjugation slightly increases the basicity of the Schiff bases. HCl, HBr and HI protonate the Schiff bases completely. The carboxylic acids protonate partially depending on their p K a , values. When the Schiff base contains two (or more) C=C bonds conjugated with C=N, the main C=C stretching band undergoes a strong intensification showing that sizeable dipole moment variations occur along the conjugated chain. 相似文献
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Summary Using the microalgaChlorella vulgaris as an example, the possibility has been shown of eliminating the lipids and pigments by oxidizing it with hydrogen peroxide without changing the compositions of the protein-carbohydrate complex. The influence of the conditions of performing the oxidation of theChlorella biomass have been studied and it has been described mathematically. The optimum conditions for eliminating the lipids and pigments have been found and the general chemical properties of the protein product isolated have been determined.N. D. Barabash took part in the work.Siberian Technological Institute, Krasnoyarsk. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 426–430, July–August, 1976. 相似文献
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