Specific features of the study and maintenance of a potato collection threatened by viruses and virus-like diseases

Background. The article deals with the problems faced while studying and maintaining a collection of plant genetic resources against a strong virus infection background.Materials and methods. The data obtained during 8 years of monitoring over 1000 potato accessions for the incidence of virus diseases are presented. The work was carried out at Pushkin and Pavlovsk Laboratories of VIR and at the Polar Experiment Station of VIR (Khibiny, Arctic Circle). Visual control of the symptoms of the infection was combined with an enzyme-linked immunosorbent assay (ELISA) for potato mosaic viruses Х, S, M and Y.Results and conclusions. For many years, the global collection of VIR has been studied and maintained under a threat of strong virus infections. Among the viruses that have the widest distribution and cause significant damage to potato, there are viruses M and Y in Pushkin, and Х in Khibiny. Among the infected plant material, accessions with a latent virus infection, manifesting tolerance to the pathogens, have constantly been observed. The conventional point-based principle of scoring field resistance of potato cultivars and hybrids to viruses requires a significant revision. A new alternative approach is proposed for virus resistance assessment, when the clonal reproduction type of the tested accessions is taken into account

Specific features of g ≈\approx 4.3 EPR line behavior in magnetic nanogranular composites

Films of metal-insulator nanogranular composites M$_x$D$_{100-x}$ with different composition and percentage of metal and dielectric phases (M = Fe, Co, CoFeB; D = Al$_2$O$_3$, SiO$_2$, LiNbO$_3$; x $\approx$ 15-70 at.%) are investigated by magnetic resonance in a wide range of frequencies (f = 7-37 GHz) and temperatures (T = 4.2-360 K). In addition to the usual ferromagnetic resonance signal from an array of nanogranules, the experimental spectra contain an additional absorption peak, which we associate with the electron paramagnetic resonance (EPR) of Fe and Co ions dispersed in the insulating space between the granules. In contrast to the traditional EPR of Fe and Co ions in weakly doped non-magnetic matrices, the observed peak demonstrates a number of unusual properties, which we explain by the presence of magnetic interactions between ions and granules

STRUCTURE AND CONTENT OF I-, HE-IMAGES IN THE MINDS OF YOUNG PEOPLE LIVING IN THE REPUBLIC OF TUVA

I-, He-images in the minds of young people, living on the territory of the republic of Tuva have been analysed in detail. An approach to the study of socio-perceptual characteristics in the minds of young people in the context of resilient behavior has been proposed, which will be interesting to specialists in the field of social perception, psychology of coping behavior and resilience. Special attention in the article has been paid to the content and structure of socio-perceptive features of images in the minds of young people. It has been proved in the paper that He-concept ensures consistency of ideas about other people, sometimes coordinating heterogeneous information about partners in communication. The authors have traced the knowledge about himself from different sides of human representations – about his volitional, communicative, bodily, material, spiritual, moral and behavioral characteristics, which make up a unique image of himself, form the I-concept of a person