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22. L-Cysteine Nitrates.

Author

Giester, G., Ghazaryan, V. V., Minkov, V. S., Boldyreva, E. V., and Petrosyan, A. M.

Subjects
CYSTEINE, RAMAN spectroscopy, SPACE groups, NITRATES, HYDROGEN bonding
Abstract

The formation of salts in the L-cysteine–HNO3–H2O system was studied yielding three representatives as single crystals: anhydrous L-cysteinium nitrate (L-CysH)NO3 (I) and two new salts (L-CysH⋯L-Cys)NO3 (II) and (L-CysH⋯L-Cys)NO3∙0.5H2O (III) with the dimeric (L-CysH⋯L-Cys) cation. (I), (II) and (III) crystallize in space groups P212121, P21 and I2, respectively. Dimeric cations in (II) and (III) were formed by very short O–H⋯O hydrogen bonds with R(O⋯O) distances of 2.440(2) Å and 2.4352(17) Å, respectively. Infrared and Raman spectra of (I–III) were registered and discussed in relation to crystal structures. Characteristics of dimeric cations are compared with those in the previously obtained compounds of L-CysH(L-CysH⋯L-Cys)F(F⋯HF), (L-CysH⋯L-Cys)Cl, (L-CysH⋯L-Cys)Br and (L-CysH⋯L-Cys)I·0.5H2O. [ABSTRACT FROM AUTHOR]

Published
2023
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24. Informational technologies use experience in the educational process in Voronezh State University.

Author

Chupandina, E. E., Kuzemkina, A. V., Boldyreva, E. V., Kurolap, M. S., Protasova, I. V., Chernikova, A. S., and Zhuravleva, T. I.

Subjects
STATE universities & colleges, EDUCATIONAL planning, EDUCATIONAL technology, PHARMACEUTICAL technology, SCHOOL environment, COVID-19 pandemic
Abstract

The introduction of informational technologies in all spheres of life inevitably affected the development of electronic technologies in the higher education system. The spread of Covid-19 to a pandemic has accelerated the education system transition to the in-depth use of informational educational technologies and the development of its own distance education systems. The purpose of this work is to study the experience of using information technologies in the educational process of the pharmaceutical faculty, based on the implementation of e-learning and distance learning technologies (Voronezh State University). The research methods were the analysis of the information environment Moodle (Modular Object Oriented Dynamic Learning Environment) of Voronezh State University and the correspondence anonymous survey of students of the pharmaceutical faculty using Google forms. The article presents the results of generalizing the experience of using information technologies of the electronic information educational environment of Voronezh State University, technical and instrumental capabilities of the electronic educational environment, highlights the advantages, disadvantages and limitations, presents statistics on the use of the capabilities of the electronic environment by students and teachers. Reserves of improving the quality of e-learning and the use of distance learning technologies at the pharmaceutical faculty of Voronezh State University are revealed. [ABSTRACT FROM AUTHOR]

Published
2022
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