Ga-In Alloy Segregation within a Porous Glass as Studied by SANS

Nanolattices can play the role of templates for metals and metallic alloys to produce functional nanocomposites with particular properties affected by nanoconfinement. To imitate the impact of nanoconfinement on the structure of solid eutectic alloys, we filled porous silica glasses with the Ga-In alloy, which is widely used in applications. Small-angle neutron scattering was observed for two nanocomposites, which comprised alloys of close compositions. The results obtained were treated using different approaches: the common Guinier and extended Guinier models, the recently suggested computer simulation method based on the initial formulae for neutron scattering, and ordinary estimates of the scattering hump positions. All of the approaches predicted a similar structure of the confined eutectic alloy. The formation of ellipsoid-like indium-rich segregates was demonstrated

SANS Studies of the Gallium–Indium Alloy Structure within Regular Nanopores

Potential applications of nanolattices often require filling their empty space with eutectic metallic alloys. Due to confinement to nanolattices, the structure of phase segregates in eutectic alloys can differ from that in bulk. These problems are poorly understood now. We have used small angle neutron scattering (SANS) to study the segregation in the Ga-In alloy confined to an opal template with the regular pore network, created by a strict regularity of opal constituents in close similarity with nanolattices. We showed that SANS is a powerful tool to reveal the configuration of segregated phases within nanotemplates. The In-rich segregates were found to have specific structural features as small sizes and ordered arrangement

Quality Of Life As The Main Factor In Increasing The Economic Safety Of The Region

Статья посвящена оценке качества жизни в рамках экономической безопасности регионов России. В статье представлен методический подход к интегральной оценке качества жизни населения регионов. Комплексная методика диагностики качества жизни состоит из восьми индикативных модулей, отражающих различные характеристики категории «качество жизни»: качество населения, занятость населения, уровень жизни населения, условия жизни населения, приемлемость окружающей природной среды для проживания населения, безопасность личности, детерминанты внутренней и внешней миграции населения, социальная защищенность населения. Диагностика качества жизни проводится в рамках экономической безопасности с использованием индикативного метода анализа. Рассмотрены состояние и динамика изменения качества жизни населения и его отдельных составляющих для субъектов РФ, входящих в состав Уральского федерального округа, в период 2000-2011 . Article is devoted to an assessment of quality of life within economic security of regions of Russia. In article the methodical approach to an integrated assessment of quality of life of the population of regions is presented. The complex technique of diagnosis of quality of life consists of eight indicative modules reflecting various characteristics of category «quality of life»: quality of a population, population employment, a population standard of living, population living conditions, an acceptability of environment for population accommodation, security of the personality, determinants of internal and external migration of a population, social security of a population. Diagnosis of quality of life is carried out within economic security with use of an indicative method of the analysis. The condition and dynamics of change of quality of life of a population and its separate components for the subjects of the Russian Federation (Ural federal district) in 2000-2011 are considered

Structure of RecX protein complex with the presynaptic RecA filament: Molecular dynamics simulations and small angle neutron scattering

Using molecular modeling techniques we have built the full atomic structure and performed molecular dynamics simulations for the complexes formed by Escherichia coli RecX protein with a single-stranded oligonucleotide and with RecA presynaptic filament. Based on the modeling and SANS experimental data a sandwich-like filament structure formed two chains of RecX monomers bound to the opposite sides of the single stranded DNA is proposed for RecX::ssDNA complex. The model for RecX::RecA::ssDNA include RecX binding into the grove of RecA::ssDNA filament that occurs mainly via Coulomb interactions between RecX and ssDNA. Formation of RecX::RecA::ssDNA filaments in solution was confirmed by SANS measurements which were in agreement with the spectra computed from the molecular dynamics simulations