https://opendata.uni-halle.de//handle/1981185920/13588 2026-09-06T00:30:30Z 2026-09-06T00:30:30Z Alimova, Xalimaxan Akhmedov, Jaxongir Nabieva, Iroda Abdumajidov, Anvar Juraev, Zafar https://opendata.uni-halle.de//handle/1981185920/126556 2026-08-20T01:20:41Z 2026-06-01T00:00:00Z

Title: Fleece Preparation Technology for Obtaining Fabric from Defective Cocoons Author(s): Alimova, Xalimaxan; Akhmedov, Jaxongir; Nabieva, Iroda; Abdumajidov, Anvar; Juraev, Zafar Abstract: The efficient utilization of silk-processing waste is essential for improving the resource efficiency and environmental sustainability of the textile industry. This study investigates a technology for producing silk fleece from defective cocoons of the Jingsong × Haoyue hybrid as a raw material for nonwoven fabrics. Unreelable cocoons were processed into silk fleece using an HL100 automatic silk wadding machine. The effects of alkaline soap-soda treatment and different boiling solutions on sericin removal and fibre quality were evaluated. The cocoon waste and prepared fleece were characterized by sorting statistics, microscopic examination of fibre arrangement, and fibre length analysis after cutting to staple lengths of 30, 35, and 40 mm. The results showed that double-dome, spotted, white-patch, and stalk-marked cocoons constituted the major defective fractions. Although unsuitable for conventional silk reeling, these cocoons proved suitable for fleece production. The optimal soda-soap boiling regime removed approximately 6-7% of sericin while preserving fibre integrity. Fibre length analysis revealed a predominance of very short (1 -10 mm) and very long (≥70 mm) fibres, indicating limited suitability for spinning bu t good potential for nonwoven manufacturing. Two processing routes for nonwoven silk materials were proposed: incorporation of thermoplastic binder fibres and needle punching followed by heat pressing. The proposed technology enables the conversion of defective cocoon waste into value-added raw material for environmentally sustainable nonwoven silk products, contributing to waste valorization and circular resource utilization in the silk industry.

2026-06-01T00:00:00Z Shadmanov, Kamoliddin Umarov, Abdusalom Mirzaeva, Elena Turdiyeva, Dilnoza Abdurakhmanova, Iroda Jalalova, Shakhnoza Aliev, Sarvar https://opendata.uni-halle.de//handle/1981185920/126555 2026-08-20T01:20:20Z 2026-06-01T00:00:00Z

Title: Coal Adsorbents from Man-Made Waste to Reduce the Emission of Pharmaceutical Substances into the Environment Author(s): Shadmanov, Kamoliddin; Umarov, Abdusalom; Mirzaeva, Elena; Turdiyeva, Dilnoza; Abdurakhmanova, Iroda; Jalalova, Shakhnoza; Aliev, Sarvar Abstract: Preservation of the environment and resources has gained momentous proportions nowadays due to increase in the population, growth in industrial activities as well as enhanced production of hazardous waste thereof. One of the greatest environmental challenges is the development of an environmentally friendly, cutting-edge technology to prevent the release of pharmaceutical products into the environment via gaseous and liquid effluents from this industry. Households effluent often comprises high concentrations of drugs and their metabolites that are not completely converted in developing organisms. The objective of this research was to prepare coal adsorbents from byproducts of canning, cotton and oil-refining industries, characterize them by methods of physicochemical analysis and test their cleaning properties for pharmaceutical agent pollutants. Thermogravimetric analysis and infrared spectroscopy were used to investigate the production of activated carbons from plant waste substances. Removal percentages of pharmaceuticals and volatile organic compounds model mixtures were evaluated. Chemical modified peach seed shell carbonizate was used for obtaining activated carbon with developed mesoporous structure, the specific surface area of 835 m²/g and a methylene blue sorption capacity of 186 mg/g; at that, adsorption layer from this carbon guaranteed not less than 97% uptake of acetone and metylchloride and up to 90% for methanol and toluene. Waste water treatment decreased COD by 50% or more to meet the discharge code.

2026-06-01T00:00:00Z Zikrillayev, Nurullo Ayupov, Kutbiddin Valiev, Sirojiddin Valikhonov, Nuriddin Vapayev, Murodjon Nasriddinov, Sayfillo https://opendata.uni-halle.de//handle/1981185920/126554 2026-08-20T01:20:33Z 2026-06-01T00:00:00Z

Title: Development of Silicon-Based Photoelements Containing Clusters of Nickel Atoms Author(s): Zikrillayev, Nurullo; Ayupov, Kutbiddin; Valiev, Sirojiddin; Valikhonov, Nuriddin; Vapayev, Murodjon; Nasriddinov, Sayfillo Abstract: A technology for producing nickel atom clusters in the volume of a silicon crystal lattice with controlled parameters has been developed. Solar cells based on silicon containing nickel atom clusters have been manufactured and their parameters have been determined. It has been established that the presence of nickel atom clusters in the lattice allows for a significant expansion of the spectral sensitivity region of silicon solar cells toward the IR spectrum to 4 μm. A new technological method for producing efficient solar cells (SC) with stable parameters and maximum efficiency has been proposed. Technology of creation of clusters of nickel atoms in the silicon crystal lattice with adjustable parameters was developed. Solar cells based on silicon containing clusters of nickel atoms were developed and their performances were determined. It is found that the presence of clusters of nickel atoms in the lattice allows to significantly broaden the spectral sensitivity region of the silicon cells toward the IR spectrum to 4 microns. A new technological method of manufacturing effective solar cells with stable parameters and maximum coefficient of performance has been revised.

2026-06-01T00:00:00Z Saitov, Elyor Sadullaev, Tuymurod Akhunov, Muqimjon Ziyadullayeva, Lola Zulumkan, Teshebaeva Amanov, Bektursun Alimov, Ravshan Ismailova, Lemara Toshanov, Okhun https://opendata.uni-halle.de//handle/1981185920/126553 2026-08-20T01:20:52Z 2026-06-01T00:00:00Z

Title: Innovative Aspects of Improving Energy Consumption and Resource Efficiency in Central Asian Countries Author(s): Saitov, Elyor; Sadullaev, Tuymurod; Akhunov, Muqimjon; Ziyadullayeva, Lola; Zulumkan, Teshebaeva; Amanov, Bektursun; Alimov, Ravshan; Ismailova, Lemara; Toshanov, Okhun Abstract: This article examines the key aspects of improving energy efficiency and resource conservation in the industrial sectors of Central Asian countries (Kazakhstan, Uzbekistan, Kyrgyzstan, and Tajikistan), based on up-to-date data from the International Energy Agency (IEA), the United Nations (UN), the Central Asia Regional Economic Cooperation (CAREC) Program, and other authoritative sources. The study analyzes current levels of energy consumption, technical losses, and the potential of renewable energy sources. Empirical data are presented on energy efficiency levels, the share of renewable energy in the energy mix, cross-border infrastructure projects (e.g., CASA-1000 and TAPI), and projected investment volumes up to 2030. The research employs comparative analysis, trend regression analysis, scenario modeling based on the CAREC Energy Outlook 2030, and SWOT analysis of key industrial sectors. The findings identify priority sectors-namely mineral-chemical, metallurgical, and energy industries-where energy intensity can be reduced by 15-25% by 2030. The study also confirms the significant potential for resource savings through the implementation of circular economy principles and advanced technologies. Based on the results, several policy recommendations are proposed, including the stimulation of private investment, reform of tariff regulation, implementation of energy efficiency standards, strengthening of regional cooperation, and workforce training in renewable energy and circular economy practices. The results demonstrate a substantial potential for reducing CO₂ emissions and enhancing regional energy security. Scenario modeling indicates that under realistic implementation of CAREC 2030 targets, industrial energy consumption in the region could be reduced by approximately 20%, and up to 30% under Net Zero Emissions (NZE) pathways. These outcomes align with global targets to double the rate of energy efficiency improvements by 2030 (COP28) and significantly reduce CO₂ emissions.

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