This paper reports on the synthesis of thin films of tungsten disulfide (WS2) by сhemical vapour deposition (CVD) using powders of sulfur and tungsten oxide obtained from tungsten metal powder. It is shown that the synthesized ultra-thin 2-dimensional (2D) films of WS2 have appropriate structural and optical properties suitable for their application in the manufacturing of electronic and optoelectronic devices. Proposed method for the synthesis of 2D few-layered WS2 can significantly accelerate the synthesis rate and will make it possible to control the stoichiometry and shapes of nanocrystals by controlling the amount of sulfur by magnetic mechanism. Moreover, obtained fewlayered crystals demonstrate long-term stability to external factors, since the synthesis and the research carried out during the year. During this time, no signs of degradation of the TMDs structure were detected.

In Zhambyl region there is a significant number of self-discharging artesian wells, large majority of which are not equipped with regulating devices. As a result of spouting, a considerable amount of groundwater is lost every year, and fertile land is swamped and salinized, causing considerable damage to agriculture in the region. Assessment of the potential for flowing well operation of pressure groundwater in Merke district has been carried out based on the analysis of the results of the expedition surveys. The capacity of perspective self-discharging wells is 0.536 m3/s and for the growing season is estimated at 6.947 million m3, which, taking into account the average irrigation of 4515 m3/ha allows to provide irrigation of agricultural crops on additional 220 ha. At development of self-discharging wells the main method of irrigation is sprinkling, under which water consumption during irrigation is reduced, there is no discharge, optimal soil water regime is provided and microclimatic indicators in plant development environment are improved. © 2022, National Academy of Sciences of the Republic of Kazakhstan. All rights reserved.

Endocrine-disrupting chemicals (EDCs) in natural waterways have significant risks to both ecological systems and human health. The development of effective removal strategies for EDCs that are selective, economical, efficient, and recyclable remains challenging due to the complexity and variability of aquatic environments. Herein, we present a proof-of-concept adsorption approach for removing bisphenol A (BPA), a common EDC, and its derivatives using A-b-cyclodextrin functionalized molecularly imprinted membranes (A-b-CDMIMs). The A-b-CDMIMs were prepared through a straightforward phase inversion method, combining the selectivity of molecularly imprinted polymers (MIPs) with the host–guest interactions of b-CD and the solvent-responsive properties of triethylene glycol dimethacrylate (TEGDMA). The unique combination of these features in A-b-CDMIMs offers a significant advantage over traditional adsorbents, addressing common challenges such as non-specific adsorption and reduced efficiency in repeated cycles. The maximum adsorption capacity (Qm) of the A-b-CDMIMs for BPA was 73.22 mg g-1, indicating high adsorption efficiency. Furthermore, when combined with a solvent-programmed adsorption-release strategy, the A-b-CDMIMs exhibited remarkable stability and maintained a removal efficiency of approximately 90% even after undergoing five cycles. These characteristics suggest that A-b-CDMIMs represent a cost-effective and sustainable approach for environmental remediation and large-scale water treatment applications. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2025.

Considerable emphasis has been devoted to fabrication of bio-nanocomposites from natural waste resources and recruiting them for low-cost removal of pollutants from water resources. In this research, using dialdehyde cellulose nanocrystal (DCNC) and wool keratin, a highly-beneficial and recyclable biocomposite (Keratin/DCNC) was triumphally fabricated to remove Cd+2 and Crystal violet from water media. Beeswax recycling wastewater, as a culture medium, was exploited to produce bacterial cellulose (BC) at the lowest plausible cost, and keratin was extracted from wool wastes. The adsorption of the adsorbates was optimized and a complete study was carried out on the kinetic, isotherm and thermodynamic aspects of adsorption processes. The adsorbent showed excellent recyclability and maximum adsorption capacity was found to be 695.56 and 1166.67 mg/g for Cd+2 and Crystal violet, respectively. The results proved the favorability of the processes and indicated that Keratin/DCNC has a high potential for being exploited for treatment of waters and wastewaters. © 2022 Elsevier B.V.

This study examined the effect of partially replacing semi-reinforcing carbon black grade N550 (up to 10 pts. wt.) and fully replacing industrial chalk with natural shungite mineral in industrial formulations of elastomer compositions intended for manufacturing various rubber technical products. It has been shown that due to the high content of carbon and silicon components in the composition of shungite mineral micropowders, their use as a filler in elastomer formulations significantly improves the physical and mechanical properties of rubber technical products (RTPs) manufactured using such compositions. It was determined that the use of SM as a partial replacement for carbon black in rubbers intended for molded rubber technical products contributes to a reduction in Mooney viscosity (up to 26.8%) and optimal vulcanization time (up to 23.7%), achieving rubbers with the required set of physical–mechanical properties and with an enhancing sealing capability (up to 19.7%). It has been established that the use of shungite mineral micropowders as a complete replacement for industrial chalk increases the strength of rubber products (RTPs) by up to 18.5% and enhances their resistance to liquid aggressive environments.

The potential of cyanobacteria to perform a variety of distinct roles vital for the biosphere, including nutrient cycling and environmental detoxification, drives interest in studying their biodiversity. Increasing soil erosion and the overuse of chemical fertilizers are global problems in developed countries. The option might be to switch to organic farming, which entails largely the use of biofertilisers. Cyanobacteria are prokaryotic, photosynthetic organisms with considerable potential, within agrobiotechnology, to produce biofertilisers. They contribute significantly to plant drought resistance and nitrogen enrichment in the soil. This study sought, isolated, and investigated nitrogen-fixing cyanobacterial strains in rice fields, and evaluated the effect of Mo and Fe on photosynthetic and nitrogenase activities under nitrogen starvation. Cyanobacterial isolates, isolated from rice paddies in Kazakhstan, were identified as Trichormus variabilis K-31 (MZ079356), Cylindrospermum badium J-8 (MZ079357), Nostoc sp. J-14 (MZ079360), Oscillatoria brevis SH-12 (MZ090011), and Tolypothrix tenuis J-1 (MZ079361). The study of the influence of various concentrations of Mo and Fe on photosynthetic and nitrogenase activities under conditions of nitrogen starvation revealed the optimal concentrations of metals that have a stimulating effect on the studied parameters. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Chloridizing processing of accumulated ash and slag waste of the Kazakhstan CHP plants has been studied. The possibility of separating iron from ash by magnetic separation to obtain a commercial iron-containing product (≈50% Fe) is demonstrated. It is shown that the residual iron content in the non-magnetic ash fraction is minimal (1.2%), while the aluminum content is about 98%. In the mullite composition, silica is mainly present in the non-magnetic ash fraction (≈97%). The silicon content in the non-magnetic fraction obtained after wet separation increased from 27.7 to 29.5 wt.%. It has been established that the complete decomposition of mullite occurs when the non-magnetic ash fraction is roasted at 1,100°C for 60 minutes, and the CaCl2 consumption is twice the stoichiometric value required for the decomposition of mullite. An increase in the degree of aluminum extraction into a cinder is caused by a change in the phase composition of ash during roasting, which occurs as a result of dehydration of low-solubility compounds. The resulting cinder contains the gelenite and anorthite phases, which are highly soluble in HCl. It has been found that the quantitative gelenite-to-anorthite ratio in the cinder, obtained under the optimal roasting conditions, is 5:1. For practical purposes, it is essential to provide for the charge mixing conditions during the ash roasting process in the presence of CaCl2, for example, by using a tubular rotary furnace. This will improve the contact between the ash particles and calcium chloride, while creating favorable conditions for the complete breakdown of mullite and formation of highly soluble aluminum compounds in the form of anorthite and gelenite. © 2022, Springer Science+Business Media, LLC, part of Springer Nature.

Background: Equine milk, including its whey proteins, is a source of nutrients and functional components in the human diet, and is especially beneficial for people with weakened immune systems, newborns, and athletes. Objectives Whey proteins in equine milk constitute approximately 20% of the total protein content and include various fractions such as albumin, globulin, and lactoferrin. Lactoferrin is one of the most extensively studied whey proteins in equine milk. Methods: HPLC-Mass analysis, enzymatic hydrolysis, modeling of 3D structure and biological activity in silico. Results: It has antioxidant, anti-inflammatory, and immunomodulatory properties, making it a promising candidate for influencing the various aspects of cardiovascular disease pathogenesis. The products of Lactoferrin hydrolysis by trypsin were confirmed using HPLC. The half-lives of the hydrolysate in the bloodstream and in an intestine-like environment were predicted in silico. Various biological activities (antihypertensive, anti-inflammatory, and antiangiogenic) were also estimated in silico and compared with the corresponding activities of lactoferrin hydrolysate amino acid sequences from camel and dromedary milk. Conclusions: The three-dimensional modeling of lactoferrin hydrolysate peptides was performed to support the development of computational models or simulations, as well as to investigate their potential antimicrobial, anti-inflammatory, or immune-modulating functions in clinical or nutritional applications. © 2024 by the authors.

One of the ways to get a link and match between Vocational High School graduates and the working world is by implementing a teaching factory (TEFA). Teaching Factory aims at aligning teaching and training in schools with the needs of modern industrial practices. However, not all schools can implement it optimally, especially those in low-industrial areas. This is one of the reasons why many Vocational High School graduates are not able to compete in the labor market. One of the solutions is to get students’ project assignments based on the potential of their region. Therefore, this study aims to develop a teaching factory model integrated with student's regional potential-based project (SRPP). This research and development (R&D) employs the Borg and Gall model, which consists of four main stages: need analysis, model development, model validation by experts through a focus group discussion and a pilot study, and model evaluation. The results show that the teaching factory model for vocational schools in low-industrial areas is valid and can be widely tested. © (2024), (Insight Society Insight Society). All rights reserved.

Precision farming is one of the ways of transition to the intensive methods of agricultural production. The case of application of unmanned aerial vehicles (UAVs) for solving problems of agriculture and animal husbandry is among the actively studied issues. The UAV is capable of solving the tasks of monitoring, fertilizing, herbicides, etc. However, the effective use of UAV requires to solve the tasks of flight planning, taking into account the heterogeneity of the available attachments and the problem solved in the process of the overflight. This research investigates the problem of flight planning of a group of heterogeneous UAVs applied to solving the issues of coverage, which may arise both in the course of monitoring and in the process of the implementation of agrotechnical measures. The method of coverage path planning of heterogenic UAVs group based on a genetic algorithm is proposed; this method provides planning of flight by a group of UAVs using a moving ground platform on which UAVs are recharged and refueled (multi heterogenic UAVs coverage path planning with moving ground platform (mhCPPmp)). This method allows calculating a fly by to solve the task of covering fields of different shapes and permits selecting the optimal subset of UAVs from the available set of devices; it also provides a 10% reduction in the cost of a flyby compared to an algorithm that does not use heterogeneous UAVs or a moving platform. © 2013 IEEE.