Search Results

You are looking at 1 - 4 of 4 items for

  • Author or Editor: S. Popov x
  • Refine by Access: All Content x
Clear All Modify Search

The purpose of this paper is to analyze the manifestations of the influence of perceptual-logical components of thinking on the evolutionary processes in the Russian lexis. The study is in line with a cognitive and evolutionary approach. Based on the information of anthroponymic sciences about degrees of perception and the quality of logics, this approach allows to take a deeper view on the main reasons of the phenomena. The review of historical transformations of the Russian lexis in terms of its perceptual-logical evolution suggests that native speakers of Russian tend to optimize the lexical system of Russian in a logical way: 1) by generalizing the lexical meanings; 2) by creating abstract vocabulary; 3) by word formation with the help of a variety of derivational means, including borrowings; 4) by overcoming mnemonic shortage using two available, metaphorical and metonymic, opportunities to create new lexical meanings; 5) by getting rid of the logical inconsistency of polynomials; 6) by distinguishing words derived from Church Slavonic and their native Russian equivalents; 7) by getting rid of the vernacular, not required for communication by the overwhelming majority of native speakers; 8) by logically returning obsolete nominations for communication needs; 9) by continuing the development of polysemy at the present time.

Restricted access
Community Ecology
Authors:
S. Popov
,
M. Miličić
,
I. Diti
,
O. Marko
,
D. Sommaggio
,
Z. Markov
, and
A. Vujić

Spatial and temporal differences in landscape patterns are of considerable interest for understanding ecological processes. In this study, we assessed habitat quality by using the Syrph The Net database and data on decreasing species richness over a 25-year period for the two largest phytophagous hoverfly genera (Merodon and Cheilosia). Furthermore, within this time frame, we explored congruence between ecological responses (species richness and Biodiversity Maintenance Function for these two genera) and landscape structural changes through correlation analysis. Our results indicate that landscapes have experienced changes in aggregation, isolation/connectivity and landscape diversity, with these parameters being significantly correlated with Cheilosia species richness loss and habitat quality. We conclude that the genus Cheilosia is a good bioindicator that can highlight not only the current quality of an area but also temporal changes in landscape patterns.

Restricted access
Journal of Radioanalytical and Nuclear Chemistry
Authors:
A. Arzumanov
,
V. Batischev
,
N. Berdinova
,
A. Borissenko
,
G. Chumikov
,
N. Gorodisskaya
,
A. Knyazev
,
V. Koptev
,
S. Lyssukhin
,
Yu. Popov
,
G. Sychikov
, and
D. Zheltov

Abstract  

Cyclotrons play an important role for production of carrier-free radioisotopes for various applications in the nuclear medicine, industry, ecology and science. Kazakhstan variable energy isochronous cyclotron, K = 50 MeV, is a 150 cm compact-pole 3 sector positive ion machine. It generates different beams of light ions: protons 6-30 MeV, deuterons 12.5-25 MeV, 3He-ions 18.5-62 MeV, alpha-particles 25-50 MeV. In the last years the cyclotron is rather intensively used for radioisotopes production to meet the needs of the Republic of Kazakhstan. The main users of radioisotope products are the Institutions of Healthcare Ministry and enterprises of oil-chemistry, metallurgy, mining, scientific institutes etc. In this submission a survey on radionuclides production including 201Tl, 67Ga, 57Co, 109Cd, 88Y, 85Sr is presented. Practically at all production stages (target preparation, extraction, purification and concentration of a product) original approaches were realized: (1) at target production by means of electrolysis the modes of reverse plating of the material for irradiation and technological layers were finalized, and at 67Ga production new extraction with better characteristics were used; that made the deeper purification from zinc, copper and iron possible. At the development of the technologies of the sealed sources production the following results were obtained: (1) 109Cd production for X-ray fluorescence analysis, and production of experimental samples for Mössbauer sources 57Co at rhodium and palladium backings. The tracers 237Pu, 88Y and 85Sr used for development of the set of methods for 239Pu, 240Pu, 90Sr and 241Am determination in the samples from Semipalatinsk Test Site were produced via nuclear reactions with alpha-particles on 235U and protons on 88Sr, 85Rb targets. Produced radiopharmaceutical preparations 201Tl chloride and 67Ga citrate are supplied to medical centers of Almaty.

Restricted access