Magnetic and magnetoimpedance properties of rapidly quenched ribbons of modified alloys based on FINEMET

Amorphous and nanocrystalline materials are attractive systems for basic research and technological applications. In a view of the energy economy and global warming concepts there is a request to search for soft magnetic materials for sensor applications, which do not request additional heat treatments and can be produced in most simple technological scheme. In this work the structure, static magnetic properties and magnetoimpedance (MI) were studied for FINEMET-type materials both with classic composition and for compositions with 10 % of iron substitution by Co, Ni, or Mn in initial state, i.e. without any additional heat treatmnet. The best MI responses were obtained for Mn-doped rapidly quenched ribbons. © Published under licence by IOP Publishing Ltd.Ministry of Education and Science of the Russian Federation, Minobrnauka: 3.6121.2017/8.9The results were obtained under financial support of the state task of the Ministry of Education and Science of Russia 3.6121.2017/8.9. We thank D. Schishkin for special support

Association of genotypes of cows of the Kholmogory breed by beta-casein with milk productivity

The aim of the study is to identify the frequency of occurrence of various allelic variants and genotypes of beta-casein in cows of the Kholmogory breed and their relationship with dairy productivity. The tasks of the research are genotyping of cattle of the Kholmogory breed by the beta-casein locus and establishing its connection with qualitative and quantitative indicators of dairy productivity. As the objects for the research there were taken 150 cows of the 1st, 2nd and 3rd lactation. An allele-specific variant of the PCR method (AS-PCR) was used to identify A1 and A2 beta-casein. As the result it had been established that in the studied part of the herd, 23 % of animals had the A2A2 genotype, 43 % of animals had the A1A1 genotype and 34 % of animals had the A1A2 genotype. For 100 days of the first lactation, animals with A1A2 genotype showed the highest value in milk yield. Animals with A2A2 genotype for 305 days of lactation had the highest milk yield and the amount of milk protein, however, the difference was not statistically significant compared to the animals with A1A2 genotype. Genotype A1A1 has lower indicators by all the parameters studied, with a significant difference relative to genotypes A1A2 and A2A2. Thus, the study of CSN2 is a promising area of scientific research, and the results of the study of beta-casein genotypes can be used as a marker selection in improving the herds of the Kholmogory breed

Promotion Effect of Alkali Metal Hydroxides on Polymer-Stabilized Pd Nanoparticles for Selective Hydrogenation of C–C Triple Bonds in Alkynols

Postimpregnation of Pd nanoparticles (NPs) stabilized within hyper-cross-linked polystyrene with sodium or potassium hydroxides of optimal concentration was found to significantly increase the catalytic activity for the partial hydrogenation of the C–C triple bond in 2-methyl-3-butyn-2-ol at ambient hydrogen pressure. The alkali metal hydroxide accelerates the transformation of the residual Pd(II) salt into Pd(0) NPs and diminishes the reaction induction period. In addition, the selectivity to the desired 2-methyl-3-buten-2-ol increases with the K- and Na-doped catalysts from 97.0 up to 99.5%. This effect was assigned to interactions of the alkali metal ions with the Pd NPs surfaces resulting in the sites’ separation and a change of reactants adsorption

MODEL OF CALCULATIONS FOR EXPERIMENTALLY-OBTAINED GAS AND WATERPROOF SER-VICE LINE OPERATIONAL PARAMETERS

Abstract. Aim. Modelling and calculations were were carried out to justify the tactical capabilities of gas and smoke protection units of the fire and rescue units as primary units carrying out fire reconnaissance and rescue of victim s of fires. A methodology for assessing actions of personnel of fire departments when rescuing victims was analysed.Method. An experimental justification is given for the need to adjust the calculation methods for determining the working parameters of gas and smoke protection units when organising mass rescue of victims of a fire. A model is proposed for considering the actions of the fireteam of a gas and smoke protection service based on graph theory. Various approaches to forecasting operational parameters of gas and smoke protection units in fire services are considered.Results. Factors determining the limiting parameters of the gas and smoke protection units are presented along with examples for calculating operational parameters during mass rescue of victims of a fire.Conclusion. A conclusion is formulated regarding complicating factors of the work of the personnel of the gas and smoke protection service in the coefficient, considering the necessary air supply for the return trip, unforeseen circumstances and average air flow

SELECTIVE PROCESSING OF CT IMAGES OF TRABECULAR BONE TISSUE IN THE PRESENCE OF ARTIFACTS IN THE FORM OF SUBMERSIBLE METAL STRUCTURES

Computed tomography is one of the informative methods of non-invasive diagnosis. Identifying artifacts can make them completely unsuitable for medical diagnosis. This work is devoted to the identification of CT-image artifacts and the search for methods for their elimination

Synthetic gene for the hepatitis C virus nucleocapsid protein.

A synthetic gene encoding the hepatitis C virus (HCV) nucleocapsid protein was constructed and expressed in E. coli. To synthesize this gene, we developed a new method that results in the enzymatic synthesis of long polydeoxyribonucleotides from oligodeoxyribonucleotides. The method, designated as the 'Exchangeable Template Reaction' (ETR), uses oligonucleotides as templates for DNA polymerase. A special mechanism was designed to exchange the templates during the polymerase reaction. The mechanism relies on the formation of a single-stranded 3'-protrusion at the 'growing point' of the elongating DNA such that it can be subsequently annealed, in a sequence-specific manner, with the next synthetic oligonucleotide. When annealed to the 3'-protrusion, the added oligonucleotide becomes a template for DNA polymerase, and the protruding 3'-end of the double-stranded DNA is used as the primer. The HCV nucleocapsid gene was assembled with DNA ligase from three fragments synthesized by ETR. The data verify that this method is efficient. The main advantage of ETR is the ability to combine more than two oligonucleotides in one tube together with polymerase and an enzymatic activity that produces a 3'-protrusion (e.g., BstXI) rather than the sequential addition of each component. The data demonstrate that as many as five oligonucleotides can be used simultaneously, resulting in a synthesized DNA fragment of designed sequence. The synthetic gene expressed in E. coli produced a 27 kDa protein that specifically interacted with antibodies from sera obtained from HCV-infected individuals

INFORMATION NETWORK TECHNOLOGIES IN EVERYDAY PRACTICES OF MODERN PENSIONERS

The article considers the digital consumption of the elderly. The basis was a mass survey conducted in the Tyumen region. The structure of the internet using by elderly people, the internet using goals were analyzed. Also the conditions of successful adaptation of elderly people were described in the article.Статья посвящена исследованию цифрового потребления людей пожилого возраста. Основой послужил массовый опрос, проведенный в Тюменской области. Проанализированы структура использования Интернета пожилыми людьми, цели использования сети Интернет, описаны условия успешной адаптации пенсионеров к использованию интернет-технологий.Материалы статьи подготовлены авторами при поддержке гранта РФФИ № 19–29–07131

Вynamics of light-absorption variations induced in a bismuth silicate crystal by visible laser illumination

We present the results of experimental studies of the dynamics of the photoinduced optical absorption in a bismuth silicate crystal subject to continuous laser irradiation with wavelengths of 532 and 655 nm. The semiconductor-laser light beam with the wavelength λ = 655 nm causes the crystal bleaching at this wavelength, whereas its exposure to a shorter-wavelength irradiation from the optical-spectrum green region with a wavelength of 532 nm increases the optical absorption at both wavelengths, of 532 and 655 nm. The experimental results are interpreted using the theoretical model which assumes that the crystal has deep defect centers of two types so that an electron at each of these centers can be in one of the states characterized by different photoionization cross sections