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Zhakova S.N.,Perm State Agricultural Academy | Novoselova L.V.,Perm State University
Biology and Medicine | Year: 2015

The results of the study of flowering of 6 species and 2 interspecific hybrids of subgenus Syringa are described in this article, which include the following: Sections Villosae C. K. Schneid.: S. josikaea J. Jacq. ex Rchb., S. emodi Wall. ex Royle, S. wolfii C. K. Schneid., S. sweginzowii Koehne & Lingelsh., S. villosa Vahl, S. × prestoniae McKelvey (S. komarowii subsp. reflexa × S. villosa), and S. × henryi C. K. Schneid. (S. josikaea × S. villosa); and section Syringa: S. vulgaris L., obtained from the collection of siringarium at the Professor A. G. Genkel Botanical Gardens of the Perm State National Research University. Each of the studied Syringa species and cultivars differs with some aspects of the inflorescence structure: The number of flowers and their arrangement in the partial inflorescence and the number of partial inflorescences and their arrangement on the main axis. The beginning and the duration of the partial inflorescences' flowering depend on their arrangement on the main axis and the number of flowers in the partial inflorescence. The clustering of partial inflorescences into three categories, basal, lateral, and apical, was implemented. The inflorescence flowers are characterized by acropetal type of blooming. The duration of bush flowering of the studied species and cultivars varies from 8 to 19 days, and the duration of inflorescence flowering-from 6 to 13 days. The peculiarities of diurnal variation of flowering are discovered: The majority of species and interspecific hybrids of Syringa are characterized by morning anthesis, which continues till 12 noon. Anthesis of S. × henryi species essentially begins at about 8 a.m., and also between 2 p.m. and 4 p.m. S. wolfii flowers have the diurnal type of anthesis, and the majority of flowers begin to open at noon till 2 p.m. Despite entomophility of the lilac flowers, only occasional attendance of plants by insects is recorded, among which are pollinators (Apis mellifera L., Bombus hortorum L.) and a visitor (Cetonia aurata L.). Copyright: © 2015 Zhakova et al. Source

Krivonosova E.A.,Perm National Research Polytechnic Institute | Sinkina E.A.,Perm National Research Polytechnic Institute | Gorchakov A.I.,Perm State Agricultural Academy
Welding International | Year: 2013

The results of metallographic analysis of the surface of corrosion failure are presented and the results obtained in investigations of stress corrosion specimens of 08Cr18Ni10Ti steel, produced by welding with electrodes with basic and rutile coatings, are discussed. © 2013 Copyright Taylor and Francis Group, LLC. Source

Trjascin M.M.,Perm State Agricultural Academy
World Applied Sciences Journal | Year: 2013

As a result of this study, the author developed and set forth a number of theories, as well as methodological and practical recommendations for socioeconomic priorities that could help to improve the stability of the food supply in the region. The author redefines the idea and the contents of the socioeconomic priorities that could help to improve the stability of the food supply, which, in opinion of the author, constitute the main direction of potential improvement of the economic relations in the manufacturing, marketing and consumption fields. The author reveals and systematizes the key elements of the cluster analysis and determines cluster groups, with the aim to optimize interaction of intraregional industries in terms of manufacturing, transporting, processing and marketing of the goods produced. © IDOSI Publications, 2013. Source

Ponomarev I.S.,Perm National Research Polytechnic Institute | Krivonosova E.A.,Perm National Research Polytechnic Institute | Gorchakov A.I.,Perm State Agricultural Academy
Welding International | Year: 2016

Special features of the microarc discharge in microarc oxidation of the D16 aluminium alloys are investigated. The stages of formation of the microarcs on the surface of the sample in operation with a regulated condenser power source with alternating current with a frequency of 50 Hz are described using high-speed video filming. © 2016, © 2015 Taylor & Francis. Source

Chudinov P.,Perm State Agricultural Academy
Revista Brasileira de Ensino de Fisica | Year: 2013

The classic problem of the motion of a point mass (projectile) thrown at an angle to the horizon is reviewed. The air drag force is taken into account with the drag factor assumed to be constant. An analytical approach is used for the investigation. Application field of the previously obtained approximate analytical formulas has been expanded both in the upward launch angle, and in the direction of increase of the initial speed of the projectile. The motion of a baseball is presented as an example. It is shown that in a sufficiently wide ranges of initial velocity and launch angle the relative error in calculating the distance of the ball does not exceed 1%. © The Sociedade Brasileira de Física. Source

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