Study of Crystal Characterization and Chemical Interaction in the Ternary System Ho-Sb-Te

Complex methods of physical and chemical analysis: differential thermal analysis (DTA), X-ray phase analysis (XRD), microstructural analysis (MSA), as well as density and microhardness measurements, were used to study the nature of chemical interaction in the Ho-Sb-Te ternary system over the entire concentration range along the following sections:1. Sb2Te3-Ho2Te3, 2. Sb2Te3-HoTe, 3. HoTe-Sb, 4. HoSb-HoTe, 5. Sb2Te3-Ho, 6. HoSb-Te. The projection of the liquidus surface of the ternary system and the diagrams of the state of internal sections were constructed according to experimental data and literature data on binary systems: Sb-Te, Sb-Ho, Ho-Te. It is established that sections (1), (2), (3), (4) are quasi-binary, and (5), (6) are non-quasi-binary sections of the ternary system. The incongruently melting compound HoSbTe3 is formed in the Sb2Te3-Ho2Te3 system and the area of solid solutions based on Sb2Te3 ~ 3‑5 mol% at 300K was found

Adaptive reaction of cotton accessions of G. hirsutum L. and G. barbadense L. species to drought stress

Adaptation, process of the adjustment of a plant to specific environmental conditions, is provided by physiological mechanisms (physiological adaptation), and at population level (species) by mechanisms of genetic variability, heredity and selection (genetic adaptation). Intraspecific and the interspecific physiological assessment of adaptation potential to drought stress was carried out on 267 collection accessions and varieties of a cotton (197 accessions of G. hirsutum L. and 70 of G. barbadense L.). Comparative study of the stress reaction of tested accessions to unfavorable environmental factors was carried out based on stress depression indices of viability of seeds in sucrose solution-imitating drought. As a result of the studies different sensitivity of plants to abiotic stress was determined. The amplitude of the changes of physiological parameter during stress allowed roughly divide cotton accessions within each species into groups by defining different degrees of comparative drought resistance of samples. Analysis of the percentage ratio of high drought resistant accessions within species, revealed differences between G. hirsutum L. and G. barbadense L. For the specie G. hirsutum L. percentage of accessions with high drought resistance was 9.1%, for specie G. barbadense L.-28.6%. G. barbadense L., in our view, is characterized by a greater potential for volatility and acclimatization to the new, unusual conditions, capable of better resisting the adverse effects of drought and has great promise for using in breeding. It was found that because of the stress in drought resistant varieties activation of RNA synthesis, increase of labile and decrease of stable DNA was observed which indicates an increase of the physiological liability and functional activity of the genetic apparatus. In susceptible varieties a reduction in the synthesis of RNA and DNA and displacement of DNA fraction ratio towards the stable were noted

Abstracts of The Second Eurasian RISK-2020 Conference and Symposium

This abstract book contains abstracts of the various research ideas presented at The Second Eurasian RISK-2020 Conference and Symposium.The RISK-2020 Conference and Symposium served as a perfect venue for practitioners, engineers, researchers, scientists, managers and decision-makers from all over the world to exchange ideas and technology about the latest innovation developments dealing with risk minimization