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A comprehensive study of monolayers of molybdenum disulfide MoS₂, formed on a silicon substrate using Raman scattering (RS), photoluminescence (PL), was carried out in comparison with the data of atomic force microscopy (AFM). Maps of the distribution of the Raman scattering intensity by optical phonons and exciton PL from monolayer MoS2 films were constructed. The dependences of the frequencies of the fundamental vibrational modes of MoS₂ (A_1g and E_2g) on the thickness of monolayer coatings were obtained. An enhancement of the Raman mode of the optical phonon of silicon by a bilayer of molybdenum disulfide was found. A hypothesis on the interference enhancement of Raman scattering of light by phonon modes of silicon is proposed.

This article is dedicated to the famous physicist, founder of the School of acousto-electronics and acousto-optics, corresponding member of the Russian Academy of Sciences, Sergey Vasilyevich Bogdanov in connection with the centenary of his birth (2.08.1921-14.02.2017).

The paper proposes algorithms that allow to increase the efficiency of parallel programs execution on high-performance computer systems, in particular, when solving problems of modeling physical processes. The developed algorithms are focused on reducing the execution time of collective operations for computer systems with SMP/NUMA node architecture in standard MPI libraries. The developed read-write blocking algorithms increase the efficiency of synchronization of access to shared memory, relative to the algorithms used in the Open PMIx library.

In April 2017, the steppes mycobiota of the “Rostov” strict nature reserve and its environs were studied. Th ere are 75 species have been identified, of which 85 % belong to class Basidiomycota, and 15 % to Ascomycota. One species ( Cheilymenia dennisii ) firstly mentioned for Russia, eight species are first indicated for Rostov province, and 20 are new for the nature reserve. Among Basidiomycota, the largest groups are “aphyllophoroid” (29 species), “agaricoid” (17) and “gasteroid” (14). A number of species have been identified ( Polyporus rhizophilus , Gastrosporium simplex , Geastrum campestre , etc.) included in several Red Data Books of the steppe regions of Russia. A large number of rare and indicative species of fungi found in the “Rostov” state nature reserve characterizes this territory as an important site for the conservation of the steppe mycobiota of Eurasia.

Taxonomic studies were conducted in the largest herbarium collections in Russia (ALTB, IRK, KFTA, LE, LECB, MW, MHA, MOSP, NS, NSK, PERM, PGFA, SVER, TK, VBGI, VLA) and abroad (BM, E, EWH, G, K, KB, P, SNU, W, WU, Z), which allowed to continue the typification of names in the genus Primula L. The lectotype (LE01024083), synthype (LE01024084) of P . macrocalyx Bunge and lectotype of P . maximowiczii Regel (LE01032003 ) were determinated.

The ways of preserving 46 Siberian species of the genus Viola L. are presented. It is established that 98 % of species are protected under natural conditions (specially protected natural territories and lists of Red Books) or in introductory centers. The possibilities of recovery of natural populations are considered.

On the basis of revision of herbarium SASY (Yakutsk) a review of species of the genus Castilleja Mutis ex L. f., growing in Republic of Sakha (Yakutia) is made. Herbarium collections reliably confirmed the occurrence on the territory of the Republic of Sakha (Yakutia) of 9 species of Castilleja and 2 species ( C. caudata (Pennell) Rebr. and C. elegans Malte) are given on the basis of literature data. In the result of morphological features analysis and characteristics of distribution of yakut species materials were identified which were described as new species C. galaсtionovae E.G. Nikolin and new variety - C. rubra (Drob.) Rebr. var. multicaulis E.G. Nikolin. Key for determination of species and data on their distribution in Yakutia are presented.

Veronica serpyllifolia ssp. serpyllifolia is a plant with a daily rhythm of fl owering and obligate autogamy, which retained some of the features entomophilous character in the structure of the flowers. Adichogamy and self-compatibility provide the contact autogamy.

Classification and ecologo-coenotic analysis results of alders of the Altai-Sayan Mts. is presented according to the Braun-Blanquet approach. Communities belong to four associations, three of them ( Doronico altaici-Duscheki etum fruticosae , Bergenio crassifoli-Duschekietum fruticosae and Athyrio distentifoliae-Duschekietum frutico sae ) is included in the class Mulgedio-Aconitetea (alliance Trollio asiaticae-Crepidion sibiricae , order Trollio- Crepidetalia sibiricae ) and association Carici iljinii-Duschekietum fruticosae ) is included in the class Loiseleu rio-Vaccinietea (alliance Empetro-Betulion rotundifoliae , order Betuletalia rotundifoliae ).

Rhythmological features of 11 species of the genus Campanula L. of different ecologo-geographical origin have been studied. It is revealed that the natural and climatic conditions of the forest-steppe of Western Siberia represent the zone of ecological optimum for the growth of these mesophilous species, which is appeared as stable, well adapted rhythms of seasonal development. Their phenorhythmotypes are long-growing with early or medium terms of regrowth, spring-summer or summer-flowering, inherent to the herbaceous polycarpics of aboriginal flora. The high phenodates variability is established, while the duration of the main periods of seasonal development varies less, confi rming the stable character of the rhythmological processes in the species under introduction.