SYNTHESIS AND RESEARCH OF POLYFUNCTIONAL SILICON-CONTAINING AMINE - A NEW PROMOTOR OF ADHESION

Various types of aminosiloxanes are used to improve the adhesion characteristics of coatings, since silicon-containing compounds can significantly improve the adhesion of polymer resins to substrates such as glass, silica, aluminum oxide and active metals. Polyfunctional aminosiloxane is obtained by the interaction of 3-aminopropyltriethoxysilane with monoethanolamine in the presence of a binary antioxidant and catalytic alkaline amounts of alcohol metal.This work was supported by the Russian Foundation for Basic Research, project #№ 20-33-90269

Nanoparticles in polyelectrolyte multilayer layer-by-layer (LbL) films and capsules : key enabling components of hybrid coatings

Originally regarded as auxiliary additives, nanoparticles have become important constituents of polyelectrolyte multilayers. They represent the key components to enhance mechanical properties, enable activation by laser light or ultrasound, construct anisotropic and multicompartment structures, and facilitate the development of novel sensors and movable particles. Here, we discuss an increasingly important role of inorganic nanoparticles in the layer-by-layer assembly—effectively leading to the construction of the so-called hybrid coatings. The principles of assembly are discussed together with the properties of nanoparticles and layer-by-layer polymeric assembly essential in building hybrid coatings. Applications and emerging trends in development of such novel materials are also identified

Characteristics of the secondary electrons calibration beam of the accelerator S-25R "Pakhra"

The characteristics of the secondary electrons` calibration quasi-monochromatic beam of the accelerator S-25R "Pakhra" of the Lebedev Physical Institute of the Russian Academy of Sciences (LPI) on the basis of magnet SP-57 are presented. With an electron energy in the range of 45-280 MeV, a collimator diameter in front of the trigger counters of 3 mm and copper Converter thicknesses of 1-3 mm, the energy resolution and beam intensity were 4.4-2.2% and around 16 e/sec, respectively

Influence of abiotic factors on sambucus nigra l. Phenorhythmics under central chernozem conditions

This article is the research of the influence of meteorological conditions on the passage of phenophases on the example of black elderberry in the conditions of the Belgorod region. Direct dependence of the developmental phases of black elderberry on the meteorological conditions of the growing season was reveale

Influence of homozygosis by marker alleles of blood groups on the productivity, reproductive qualities and longevity of cows

Currently, in populations of different cattle breeds there is elimination of a number of alleles of blood groups and an in-crease in the homozygosity coefficient that leads to rise in the amount of homozygous animals. In this regard, the aim of the research was to study the effect of homozygosity by EAV-locus of blood groups on the productive and reproductive characteristics of cows. The research was carried out on the farms of the Smolensk region for breeding of Sychevskaya cattle breed: the “Rybkovskoye” breeding farm and pedigree breeding unit Agricultural Production Cooperative (APC) named after Uritsky. On these farms there were selected 2078 cows, homozygous according to alleles of EAV - locus of blood groups and heterozygous animals born in 2010-2014 (21 and 581, 50 and 1426 heads, respectively). The study has shown that the average milk yield over the productive life of homozygotes in the herd of the “Rybkovskoye” farm is insignificantly lower and on the farm named after Uritsky this parameter is significantly higher. Application of one-way ANOVA analysis determined the weak effect of genotype on the productivity of animals on the “Rybkovskoe” farm only for the first lactation with factorial effect in milk yield, milk fat and protein 1.2, 1.5 and 1.1%, respectively. On the breeding farm named after Uritsky the factorial effect in milk yield and fatyield for the second lactation was 0.3 and 0.4%, and on the average over the life in milk yield it was 0.4%. The analysis of repro-ductive qualities: the age of the first calving, the age of the first fruitful insemination, multiplicity of insemination to lactation, the number of days before the first insemination in the current lactation, the duration of open days revealed close values, similar nature of distribution and variation of these indicators, absence of statistically significant differences between them in homozy-gotes and heterozygotes. A weak (2% or less) influence of homozygosity on productive longevity, which determines the superiority of homozygous cows over heterozygous, characteristic for samples from both farms, has been found

Creation and decay of eta-mesic nuclei

First experimental results on photoproduction of eta-mesic nuclei are analyzed. In an experiment performed at the 1 GeV electron synchrotron of the Lebedev Physical Institute, correlated pi+n pairs arising from the reaction gamma + 12C -> N + eta(A-1) -> N + pi+ + n + (A-2) and flying transversely to the photon beam have been observed. When the photon energy exceeds the eta-meson production threshold, a distribution of the pi+n pairs over their total energy is found to have a peak in the subthreshold region of the internal-conversion process eta p -> pi+ n which signals about formation of eta-mesic nuclei.Comment: 6 pages, 6 figures. Talk at CIPANP, May 2000, Quebe