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Specimens of the rare species Cynodontium suecicum (Rhabdoweisiaceae, Bryophyta) were collected near Drozdovka Bay on the Barents Sea coast of the Kola Peninsula (Russia) in 2016. They were compared with samples of C. suecicum from the Teriberka area (also the coast of the Barents Sea) gathered in 1977 by R. N. Schljakov. The morphological features of both groups of samples were studied, and nucleotide sequence data for ITS1-2 nrDNA and trnL-F cpDNA were obtained. Molecular analysis suggested C. suecicum as a hybrid that inherited cytoplasmic DNA from C. tenellum and nuclear DNA from Kiaeria blyttii. Taking into account the rather clear morphological delimitation against other species, combined with the stability of genetic characters, we believe that S. suecicum should be retained as a species-level taxon.

The article dwells upon precedent phenomena in the French protest discourse of 2018-2020. The authors of the article analyze the precedent phenomena used in the slogans of the Yellow Vests movement, as well as opponents of the reform of the French pension system proposed by French President Emmanuel Macron. The analysis of the content of posters and graffiti that were published in the media and social networks made it possible to ascertain the high frequency of accessing precedent situations and texts, identifying their main sources, explaining the reasons for referring to these sources, and tracing the transformation of precedent statements in new contexts, and also understand how recently emerging protest movements, in turn, are becoming precedent. The results of the study led to the conclusion that the role of precedent phenomena is important, which perform not only informational, but also emotional-evaluative functions, which contribute to the consolidation of citizens in the struggle for their rights. It was also concluded that the cognitive base of foreign linguistic culture is necessary for successful communication and an adequate interpretation of texts created by representatives of this linguistic culture, and therefore the realities of the socio-political life of the country of the language being studied. The article contains a large number of examples. The article may be of interest to experts in the field of political discourse, communication and translation/interpretation. It can also be used for the purpose of linguistic and cultural studies.

The specific features of the application of distributed functions to the calculation of the energy of molecules in the Hartree-Fock approximation are considered, and models for the generation of such functions are proposed. The results can be used for modification of traditional atom-centered functions by shifting their centers in accordance with the models proposed.

Ischemia of soft tissues in crush syndrome results in activation of free radical oxidation processes, which negatively effect the functions of many biological systems. The presence of antioxidant system in the body can inhibit the action of free radicals. Antiradical effect of this system is seen in vitamin K, ubiquinone and ascorbic acid. The results of the experiment showed that the quantity of vitamin K, ubiquinone and ascorbic acid increases in the serum of blood after decompression of soft tissues in 14 hours, three and seven days. This fact supports an active participation of antioxidant system in the pathogenesis of crush syndrome.

The trimethylsilyl and diethylboron derivatives of ethyl-N-nitrocarbamate were prepared. The former compound was found to exist as an equilibrium mixture of three stereoisomers, i.e., the N- and O-derivatives together with the previously unknown “imide” isomer. A mechanism of the tautomeric rearrangements in the system, involving both the charged ring intramolecular and the dissociative migration of the Si(CH3)3 group is suggested. The latter compound appears to exist in its “imide” form in which the boron atom is coordinated to the carbonyl group oxygen. The pyridine complex of this derivative has the N-isomer structure.

The dependence of the kinetic and thermodynamic parameters of the tautomeric equilibrium of alkyldimethylsilyl derivatives of alkylnitramines on the nature of the radicals on nitrogen and silicon is in good agreement with the mechanism proposed earlier for this process, which invokes a many-center cyclic transition state.