Сравнительные характеристики этнических авто- и гетеростереотипов российских студентов

The article is devoted to the analysis of the ethnic stereotypes as the factors of interethnic perception, cross-cultural communication and adaptation. The Results of studies of Russian students' ethnic stereotypes concerning the students from Africa and China are considered in the article.Статья посвящена рассмотрению этнических стереотипов как факторов межэтнического восприятия, межкультурной коммуникации и адаптации. Представлены результаты эмпирических исследований этнических стереотипов российских студентов относительно студентов из Африки и Китая

К проблеме соотношения личностных черт и этнических стереотипов студентов многонационального вуза

The possibility of considering personality traits as factors of social perception determining the characteristics of ethnic stereotypes and prejudices is discussed in the article. The results of the empiric research of the relation of confidence and aggressiveness in the Russian students of a multinational university to the degree of their ethnic prejudices are presented.Обоснована возможность рассмотрения черт личности как факторов социальной перцепции, которые могут обуславливать в том числе характеристики этнических стереотипов и предубеждений. Представлены результаты эмпирического исследования соотношения уверенности и агрессивности российских студентов многонационального вуза с выраженностью у них этнических предубеждений

Защитное действие экстракта листьев черники в отношении эксайтотоксического действия глутамата на нейроны коры мозга крыс

The aqueous extract of blueberry leaves inhibits the glutamate-induced Ca2+ influx into the synaptosomes of rat brain neurons and the IC50 value of this process is close to the IC50 for MK-801, a well-known noncompetitive antagonist of glutamate NMDA subtype receptors. The aqueous extract of blueberry leaves protected the cultured neurons of the rat cerebral cortex from the neurotoxic effect of glutamate, and the inhibition intensity depended on the incubation time with the extract.Водный экстракт листьев черники ингибирует глутамат-индуцированный вход ионов Са2+ в синаптосомы нейронов мозга крыс, и IC50 этого процесса близка к IC50 для MK-801 – известного неконкурентного антагониста глутаматных рецепторов NMDA-подтипа. Водный экстракт листьев черники предохранял культивируемые нейроны коры мозга крысы от нейротоксического действия глутамата, причём выраженность ингибирования зависела от времени инкубации с экстрактом, на фоне которого действовал глутамат

Multifunctional biologics which combine microbial anti-fungal strains with chitosan improve soft wheat (triticum aestivum l.) yield and grain quality

Plant science

IR absorption spectra in the region of stretching and deformation vibrations of hydrogen bond in pure and alloyed single crystals of LiNbO

We have measured infrared absorption spectra of the stretching and bending vibrations of the hydrogen bond of pure and alloy additives Me (Me = Mg, Zn) single crystals of lithium niobate (LiNbO3) grown using various technologies. Preliminary studies of the spectra showed that the frequency of stretching vibrations in the IR spectra of single-crystal samples obtained from the homogeneously doped charge differ significantly (more than 50 cm−1). However, no difference in the IR spectra of single crystals obtained using other doping techniques, we have found. It is assumed that the observed differences in the absorption spectra of single crystals due to the different character of the formation of hydrogen bonds in the preparation of precursors Nb2O5: Me

Salisbury screen with lossy nonconducting materials: Way to increase spectral selectivity of absorption

We present a modified Salisbury screen design in which the thin absorbing metal layer is replaced with a layer of nonconducting lossy material. The conditions for total absorption in such a structure are explained using a simplified analytical model and rigorous numerical calculations. For the proof-of-principle experiments, germanium/silicon bilayers deposited on aluminium substrates are designed and manufactured. The structures demonstrate nearly perfect absorption in the near-IR spectral range. Compared to conventional Salisbury screens, a lossy semiconductor top layer exhibits increased spectral selectivity of absorption. The wavelength of nearly perfect absorption remains tunable by optimizing the thicknesses of the lossy and transparent layers

Infrared reflection spectroscopy and optical constants of LiNbO

We have measured infrared reflectivity spectra of thin lithium niobate films of nanometer thickness, grown by a pulsed laser deposition technique using KrF-excimer laser (λ=248 nm) on the single crystalline substrates (sapphire, MgO, NdGaO3 and SrTiO3). Using the dispersion analysis technique, we have calculated thicknesses and optical constants of the films. The phonon parameters of the substrates and films are obtained

Salisbury screen with lossy nonconducting materials: Way to increase spectral selectivity of absorption

We present a modified Salisbury screen design in which the thin absorbing metal layer is replaced with a layer of nonconducting lossy material. The conditions for total absorption in such a structure are explained using a simplified analytical model and rigorous numerical calculations. For the proof-of-principle experiments, germanium/silicon bilayers deposited on aluminium substrates are designed and manufactured. The structures demonstrate nearly perfect absorption in the near-IR spectral range. Compared to conventional Salisbury screens, a lossy semiconductor top layer exhibits increased spectral selectivity of absorption. The wavelength of nearly perfect absorption remains tunable by optimizing the thicknesses of the lossy and transparent layers

Study of wide band-gap crystal LiCaAlF

Polarized IR-reflection spectra and results of ab initio calculations of vibrational and electronic properties of LiCaAlF6 single crystal are presented. It is shown that the crystal band gap is direct. Experimental and theoretical parameters are obtained for dipole-active and all phonons, respectively, including silent modes. Experimental IR-reflection and Raman spectra are well described in the frame of results obtained by ab initio calculations. The peculiarities are discussed concerning the structure of electronic bands, the interatomic interactions, the character of lattice vibrations, and the phonon dispersion

Interference-enhanced absorption of visible and near-infrared radiation in ultrathin film coatings

We report the interference-enhanced absorption of electromagnetic radiation in two-layer lossy coatings on metal substrates. The conditions for the complete absorption of monochromatic radiation are described in comparison with those in previously studied single-layer coatings. Proof-of-principle measurements of the interference-enhanced absorption in the near-infrared range are presented for silicon-on-germanium coatings on aluminum substrates. We also provide various examples of materials that can be used to create similar light-absorbing coatings for visible and near-infrared ranges. The proposed design can be applied to optical filters, optoelectronic devices, photodetectors, and light-emitting devices.</p