Design and synthesis of organic nonlinear optical materials

Following the development of the idea of octupolar molecules as nonlinear optical materials a variety of compounds have been reported. Trans-porphyrins have a great potential to selforder into octupolar symmetry. Nonlinear optical properties can be tuned by using strong donor-acceptor groups in porphyrins as well as extension of conjugation. Here we report the syntheses of trans-A2D2- porphyrins and their dimerization into cubic octupoles by organic bidentate ligands

Design and synthesis of organic nonlinear optical materials

Following the development of the idea of octupolar molecules as nonlinear optical materials a variety of compounds have been reported. Trans-porphyrins have a great potential to selforder into octupolar symmetry. Nonlinear optical properties can be tuned by using strong donor-acceptor groups in porphyrins as well as extension of conjugation. Here we report the syntheses of trans-A2D2- porphyrins and their dimerization into cubic octupoles by organic bidentate ligands

Competitive positions of eastern europe and central asia countries at the world wheat market

The authors revealed the actual problems of whet trading in the global market. This article evaluates the trends of wheat trading in countries of Eastern Europe and Central Asia for period of 15 years. According to international competition indexes examined by authors, the competitive power has such countries as Russian Federation, Ukraine, Kazakhstan, Poland Romania and Uzbekistan

A Neuromedin U Receptor Acts with the Sensory System to Modulate Food Type-Dependent Effects on C. elegans Lifespan

Different food types modulate worm lifespan and involve the neuropeptide receptor NMUR-1, which acts with the sensory neurons in a bacterial lipopolysaccaharide structure-dependent manner

Results of a Joint Epizootiological Survey of Transboundary Natural Plague Foci of the Russian Federation and Potentially Focal Territories of the Republic of Kazakhstan in 2019–2022

Consolidation of the efforts in implementation of epidemiological surveillance and control over plague and other dangerous natural-focal infections is an essential aspect in ensuring epidemiological well-being as regards particularly dangerous infectious diseases in the territory of natural plague foci and potentially focal territories located within the borders of the Russian Federation and the Republic of Kazakhstan. The aim of the work was to carry out a joint epizootiological survey of the transboundary territories of the Volga-Ural sandy natural plague focus and the territory of the East Kazakhstan region of the Republic of Kazakhstan (RK) potentially focal for plague over the period of 2019–2022. Materials and methods. Samples of field materials, collected during the epizootiological survey of the territory of Kazakhstan, were studied using bacteriological, molecular-genetic, and immune-serological methods. Results and discussion. We have obtained the current evidence on the spatial-biocenotic structure, the circulation of pathogens of dangerous natural-focal infectious diseases in the transboundary territories of Eastern and Western Kazakhstan. It has been established that the conditions that contribute to the possibility of human infection with plague and other dangerous infectious diseases in case of the aggravation of epizootic situation in the foci or importation of the pathogens into the territory are in place

DETERMINATION AND ASSESSMENT OF THE SPATIO-TEMPORAL CHANGING DYNAMICS IN THE GROUNDWATER LEVEL AND MINERALIZATION IN IRRIGATED AREAS UNDER CLIMATE CHANGE (AS AN EXAMPLE OF SYRDARYA PROVINCE)

In the irrigated lands of the Aral Sea Basin, salinization processes are taking place as a result of rising groundwater levels and increasing its mineralization due to the unsustainable use of water and land resources. This, in turn, leads to the withdrawing of arable land and a decrease in crop yields. This is especially the case in the irrigated areas of the lower reaches of the Amudarya and Syrdarya rivers, located in Uzbekistan, southern Kazakhstan, and Turkmenistan. This research was aimed to learn and evaluate the long-term changing behavior of groundwater level and mineralization in the irrigated areas of the Syrdarya province of Uzbekistan from 2000 to 2015 by using traditional methods, and GIS-based methods for from 2016 to 2019. For the first time, the level and mineralization of groundwater in the administrative districts of the province were studied and assessed. As a result, the intra-dependence of the groundwater level and mineralization on soil conditions, relief, and climatic factors were estimated. Based on the results of the study, agricultural specialists and farmers of the province were highly recommended to take the following mitigation measures considering the actual condition of groundwater mineralization in the irrigated areas of the Syrdarya province: targeted and economical use of irrigation water; ensuring that existing drainage networks are in an adequate working condition and can operate with full-efficiency

Hermite-Hadamard-Type Inequalities for Increasing Positively Homogeneous Functions

We study Hermite-Hadamard-type inequalities for increasing positively homogeneous functions. Some examples of such inequalities for functions defined on special domains are given

Computer-Test Control of Knowledge of Students in Engineering Graphics

This article deals with the principles of the development and preparation of tests, how to use a computer program to control the knowledge of students on the engineering drawing