bluuebunny/crossref_metadata_2025 huggingface dataset:
Mid-infrared spectra of T Tauri disks: Modeling the effects of a small inner cavity on CO2 and H2O emission
Authors: Vlasblom Marissa , van Dishoeck Ewine F. , Tabone Benoît , Bruderer Simon
Published: December 2023

Context. The inner few AU of disks around young stars, where terrestrial planets are thought to form, are best probed in the infrared. The James Webb Space Telescope is now starting to characterize the chemistry of these regions in unprecedented detail, building on earlier results of the Spitzer Space Telescope that the planet-forming zone of disks contain a rich chemistry. One peculiar subset of sources characterized by Spitzer are the so-called CO2-only sources, in which only a strong 15 μm CO2 feature was detected in the spectrum.

Aims. One scenario that could explain the weak or even non-detections of molecular emission from H2O is the presence of a small, inner cavity in the disk. If this cavity were to extend past the H2O snowline, but not past the CO2 snowline, this could strongly suppress the H2O line flux with respect to that of CO2. For this work, we aimed to test the validity of this statement.

Methods. Using the thermo-chemical code Dust And LInes (DALI), we created a grid of T Tauri disk models with an inner cavity, meaning we fully depleted the inner region of the disk in gas and dust starting from the dust sublimation radius and ranging until a certain cavity radius. Cavity radii varying in size from 0.1 to 10 AU were explored for this work. We extended this analysis to test the influence of cooling through H2O ro-vibrational lines and the luminosity of the central star on the CO2 /H2O flux ratio.

Results. We present the evolution of the CO2 and H2O spectra of a disk with inner cavity size. The line fluxes show an initial increase as a result of an increasing emitting area, followed by a sharp decrease. As such, when a large-enough cavity is introduced, a spectrum that was initially dominated by H2O lines can become CO2-dominated instead. However, the cavity size needed for this is around 4–5 AU, exceeding the nominal position of the CO2 snowline in a full disk, which is located at 2 AU in our fiducial, L* = 1.4 L⊙ model. The cause of this is most likely the alteration of the thermal structure by the cavity, which pushes the snowlines outward. In contrast, our models show that global temperature fluctuations, for example due to changes in stellar luminosity, impact the fluxes of H2O and CO2 roughly equally, thus not impacting their ratio much. Alternative explanations for bright CO2 emission are also briefly discussed.

Conclusions. Our modeling work shows that it is possible for the presence of a small inner cavity to explain strong CO2 emission in a spectrum. However, the cavity needed to do so is larger than what was initially expected. As such, this scenario will be easier to test with sufficiently high angular resolution (millimeter) observations.
Dynamical tides in binaries: Inconsistencies in the implementation of Zahn’s prescription
Authors: Sciarini Luca , Ekström Sylvia , Eggenberger Patrick , Meynet Georges , Fragos Tassos , Song Han Feng
Published: December 2023

Binary evolution codes are essential tools to help in understanding the evolution of binary systems. They contain a great deal of physics, for example stellar evolution, stellar interactions, mass transfer, tides, orbital evolution. Since many of these processes are difficult to account for in detail, we often rely on prescriptions obtained in earlier studies. We highlight that the impact of the dynamical tides with radiative damping has been implemented inconsistently with respect to its original theoretical formulation in many studies. We derive a new analytical solution for the evolution toward synchronization in the case of circular orbits and propose turnkey equations for the case of eccentric orbits that can be used in population synthesis studies. We compare the strength of the tidal torque obtained with this new formula with respect to that obtained with the formula generally used in literature by studying how the evolution toward synchronization of main sequence stellar models is affected. We conclude that by using an incorrect formula for the tidal torque, as has been done in many binary codes, the strength of the dynamical tides with radiative damping is over- or underestimated depending on whether the star is close to or far from synchronization.
The influence of stressful weather conditions on the formation of soybean productivity when using growth-regulating drugs in the conditions of the Moscow region
Authors: Gataulina G.G. , Shitikova A.V. , Zarenkova N.V. , Negassi B.T. , Konsantinovich A.V.
Published: December 2023

Modern soybean varieties of the northern ecotype are grown in the Central Region of the Russian Federation, which is important for solving the problem of vegetable protein deficiency and food security. Stressful weather conditions at certain stages of the growing season (drought, lack of heat) can have a strong effect on the yield formation and the maturity of soybeans. The article presents the results of a field experiment on the effect of stressful weather conditions of the 2019 season and the use of biologically active substances on the growth, development and formation of soybean elements of productivity in Moscow region.
Geoinformatics and methods of studying natural systems in agriculture
Authors: Pluzhnikova Natalya N.
Published: December 2023

The development of information systems has led to interdisciplinary approaches in the field of studying the agricultural crops cultivation. The author analyzes the role of such an interdisciplinary field as geoinformatics in the field of agricultural cultivation and, in particular, viticulture. The author points out the systematic nature of this field study, its applied nature, the need to train high-quality specialists. The author presents a number of geoinformatics methods and tools that can be applied in viticulture. Geoinformatics methods allow to perform soil and climate analysis, develop measures to protect vineyards from weather conditions. The author comes to the conclusion that geoinformatics methods can be used to optimize various viticulture processes, from growing and caring for vines to harvesting, marketing, and resource management at the level of modern agricultural product quality requirements.
Influence of Nanopolymer Preparations Based on Chitosan Bombyx Mori on the Germination of Seeds of Wheat Varieties
Authors: Amanturdiev Shavkat , Rashidova Dilbar , Rashidova Sayyora
Published: December 2023

In recent years, the introduction of nanotechnologies for use in grain growing has been widely spread. The effect of nanopolymer preparations based on chitosan on the laboratory germination of various wheat varieties Krasnodar-99, Oksuv, Dustlik, Semurug, Tezpishar and Istiklol-6 was carried out at the Research Institute of Breeding, Seed Production and Agricultural Technology of Cotton Growing in 2018-2020. The best indicators of laboratory germination had seeds treated with nanopreparations Nanoascorbatchitosan 0.5% (4:1), Polymer-metal complex Cu2+:Ag 8:2 and Nanochitosan 0.5% (90 kDa), which had a higher germination rate than the control and the Daltebu standard for all studied varieties of various origin. The influence of nanopreparations on the length of the aboveground and underground parts of seedlings of wheat varieties Krasnodar-99 and Grom was also studied under phytotron conditions on the 7th day, where the measurements of nanopolymer preparations in the Krasnodar-99 variety exceeded the control in the aerial part by 9.8-15.3mm, and underground at 11.3-17.5mm and standard at 4.9-9.4mm; 8.2-14.4mm, respectively. The same picture was observed in the Grom variety.
Physiological and Cytological Features of Fertilization, Formation of the Embryo and Endosperm During Interspecies Hybridization of Cotton
Authors: Daminova Dilarom , Rakhmankulov Said-Akbar , Jalolov Khurshidbek
Published: December 2023

The article presents the data of physiological and cytological studies on the study of the features of the process of fertilization, the formation of the embryo and endosperm in the distant interspecific hybridization of cotton. Normally, the influx of hormones that regulate the division of the endosperm occurs in the opposite direction of the movement of phloem and xylem nutrient flows, which cause the movement of division waves and end by the 8th-9th day with the cell formation of the nuclear endosperm, which occurs by delimiting the cytoplasm around the nuclei through the formation of chains of vesicles emerging cell walls, followed by the formation of cell walls. And in the process of formation of a distant interspecific endosperm, a massive multiple formation of abnormal nuclei occurs, which remain viable due to the total metabolism and only in the common cytoplasm of a multinuclear cenocyte. It was revealed that the imbalance of the chromosomal composition of the nuclei in the common nuclear coenocyte leads to the death of its nuclei before the stage of cell formation and, therefore, when interspecific embryos switch to endosperm nutrition, they lose it, which blocks further growth and development of interspecific embryos inside the forming seed.
Water Consumption and High Temperature Tolerance in Cultivation Using Different Irrigation Methods of Developed, New and Prospective Varieties of Cotton in the Conditions of Barren Grass Soils
Authors: Kamilov Bahtiyor , Ziyatov Musulman , Gapporov Samandar , Danabayev Abdumurat
Published: December 2023

The article presents the results of field experimental research on selection of regionalized, new and promising varieties of cotton suitable for root system drip irrigation (TS) and their maintenance based on drought-resistant and resource-efficient technologies in the conditions of barren soils of old irrigated meadows of Surkhandarya region. In the conducted research, cotton varieties Bukhara-102 (control), Sultan, Istiqlal14, SP-1601, Surkhan-106 were watered before irrigation with respect to the limited field moisture capacity (ChDNS) in the control variants of 7070-60 percent, drip irrigation. and in the experimental options of irrigation, field studies were conducted on irrigation at 65-70-65 and 70-75-65 percent. As a result, in the southern climatic region of our Republic, the optimal irrigation procedure, irrigation rate and seasonal irrigation rates, as well as indicators of high temperature tolerance, were studied in the irrigation of local regionalized, new and promising varieties of cotton.
Scientific Basis of Use of Humin-Based Stimulants in Cotton
Authors: Abdullaev Fayzulla , Abdualimov Shuhrat , Karimov Sharofiddin
Published: December 2023

In our republic, biostimulants are important in growing high and quality crops from agricultural crops. Special attention is being paid to uniform harvesting of seeds, improvement of disease tolerance and improvement of cotton growth and development, as well as high and highquality cotton yield and wide introduction. Humic stimulants are ecologically friendly, economically cheap and innovative. Nowadays, in world practice, the scale of using humus-based stimulants is increasing in order to increase soil fertility and the efficiency of using nitrogen and phosphorus fertilizers, to accelerate the growth and development of plants. In the conditions of typical gray soils of Tashkent region, humic-based stimulators before sowing seeds, when used in the optimal period and norms, the germination of seedlings is accelerated by 10-15%, and when processed in the optimal period and norms of cotton during the 2-3 Chinese leaves, combing and flowering periods, the growth and development of the plant improves, physiological as a result of the acceleration of the processes, it was found that the cotton yield increased by 4.0-6.0 tons/ha.
Quantitative and Qualitative Characteristics of Organic Matter Under Long-Term Exposure to Natural and Anthropogenic Factors
Authors: Mazirov Mikhail , Matyuk Nikolay , Gafurova Laziza , Polin Valeriy , Khakberdiev Obid
Published: December 2023

Studies have found that the increase in differences between the amount of energy subsidies invested in agrobiocenoses and alienated from them over a 105-year period changes the direction of biochemical processes of organic matter transformation, which leads to significant losses of organic carbon reserves, which amount to 17.5 t/ha in highly degraded soils, 7.3 t/ha in poorly cultivated soils, and in highly cultivated increases them by 2.8 t /ha, respectively, compared with the initial content. Long-term use of arable land affects the qualitative characteristics of the state of organic matter of sod-podzolic soil, which are expressed in a change in the ratio of the peripheral and central parts, the enrichment of humus with nitrogen. The humus substances of medium (57%) and highly cultivated soils (54%) are characterized by the highest degree of participation of peripheral groupings in the construction, and the least highly degraded (29%).
Influence of ultrasonic and mechanical dispersion on the viscosity characteristics of water-oil emulsions: Experimental study
Authors: Salikhanova D.S. , Abdikamalova A.B. , Ismoilova M.A. , Sagdullayeva D.S. , Saidkhonova Sh.A.
Published: December 2023

In this article, the influence of ultrasonic and mechanical dispersion on the viscosity characteristics of water-oil emulsions was studied. It was found that an increase in the duration of exposure to ultrasound leads to an increase in temperature as a result of intensive dispersed system mixing. Due to this, there is an intensification of the interaction between the particles, dispersion, and coagulation. The analysis of the results allowed to determine the optimal ratio between the time of ultrasonic exposure and the emulsifier concentration to obtain an emulsion with low viscosity and a dispersion range. Ultrasonic dispersion promotes the formation of fine particles and a wider polydispersity, which improves emulsion viscoelastic parameters and density. It was found that ultrasonic treatment for 80-120 seconds enhances the nanoscale effect, reducing the emulsion dynamic viscosity. These results are of significant importance for the control and optimization of the viscosity properties of emulsions in various industrial fields, including the food industry.
Changes in the phenolic complex of red aboriginal grape varieties in the system “grapes – base wine sparkling wine”
Authors: Shmigelskaya Natalia , Makarov Alexander , Lutkov Igor , Maksimovskaya Victoria , Sivochoub Galina
Published: December 2023

Due to the increased consumer interest in domestic wine products, winemaking enterprises are paying special attention to the use of aboriginal grape varieties now, in order to give products with distinctive characteristics, enabling to take the rightful place in wine market. However, there is no sufficient information about changes in the phenolic complex of grapes in the process of producing sparkling wines from red aboriginal varieties. The phenolic complex of grapes, base wines and sparkling wines produced from them was assessed, followed by the correlation established between the content of total phenolic, including coloring, substances in base wines and sparkling wines with their initial content and macerating (extracting) ability of these grape components, with corresponding correlation coefficients, which can be used for targeted regulation of accumulating these components.
Special characteristics of technological indicators of white aboriginal grape varieties
Authors: Shmigelskaya Natalia , Lutkov Igor , Maksimovskaya Victoria , Sivochoub Galina , Тimoshenko Ekaterina
Published: December 2023

Sparkling wines are high in demand, and they firmly occupy their strong position in wine market. In recent years, there was a reorientation of consumers from the low-price segment of sparkling wines to the mid-price and premium ones, motivating the manufacturer to be searching for new solutions for the unique high-quality wine production. One of the ways of its producing is the use of aboriginal grape varieties. At the same time, there is insufficient information about the distinctive technological characteristics of aboriginal grape varieties, which makes it difficult to release a product of high-quality. As a research result, significant indicators were established (the mass concentrations of titratable acids, proteins, polysaccharides, the content of phenolic substances in the must without contact with the pulp, the content of phenolic substances in the must after extraction of the pulp for 4 hours, the technological stock of phenolic substances) to differentiate grapes in accordance with the origin, and characterize their technological potential. A comparative analysis of aboriginal grape varieties with classical cultivars traditionally used in sparkling wine production was carried out. Deviations in the criterion technological indicators of aboriginal grape varieties were established to be taken into account when selecting grape processing technology for high-quality sparkling wine production.
Economically Valuable Traits of Alfalfa Plants in The Variety Testing Nursery
Authors: Amanturdiev Shavkat , Sydyk-Khodzhaev Ramziddin , Sabirov Alisher
Published: December 2023

The article presents the three-year results for 2018-2020 of studies on height, leafiness of plants, protein content, as well as hay yield in alfalfa samples in the nursery of the 2018 sowing variety test. The studied accessions and the standard variety Tashkent-1 almost did not differ in plant height the difference was only 1-2 cm. plants was higher than the standard by 3-2cm. The highest leafiness of plants was in samples C-3646 (variety Zia, USA), C-3327 (I.o. Prima, France) and C-3649 (F2 Tashkent-721x group of varieties) 48.1%, 47.5% and 46.4% respectively, which exceeded the standard variety. The high protein content of hay enhances the nutritional quality of alfalfa. According to this indicator, the data obtained show that the varieties S-3649, S-3646 and S-3647 had superiority over the standard variety Tashkent-1 (17.85%) by 1.03-1.32%. According to the total hay yield for two years, samples S-3647 and S-3649 were 108.6% and 106.1% higher in comparison with the standard variety (129.0 c/ha). And in the rest of the samples, the hay yield was lower than that of the Tashkent-1 variety. According to the combination of a set of traits, samples C-3647 (M.o. from variety 2711x group of varieties) and C3649 (F2 Tashkentskaya-721x group of varieties) are of the greatest interest for breeding.
To the study of conservation agriculture for sesame production in the northern areas of the republic of Karakalpakstan
Authors: Mambetnazarov B.S. , Bekbanov B.A. , Mambetnazarov A.B. , Aybergenov B.А. , Quwanishbaeva Sh.D. , Mambetnazarov B.B.
Published: December 2023

As a result of the use of the herbicide Zeldek extra (active ingredient Haloxyfop-p-methyl a.e. Bentosan 48% w.p.), about 70% of the death of cereal weeds and the destruction of the aerial parts of field grasses were observed. Restoration of weed roots was observed 10-15 days after spraying. The highest sesame yields using soil-protective resource-saving technology were obtained in the experimental variant with a seed sowing rate of 5 kg per 1 hectare.
Analysis of Maritime Content in the Project for Strengthening the Profile of Pancasila Students (P-5) as an Educational Media in Getting to Know the Culture of Coastal Communities at SMP Negeri 19 Bintan (Activist School Batch 2)
Authors: Nevrita Nevrita , Sujoko
Published: December 2023

The Driving School Program is a program that focuses on developing comprehensive learning outcomes, including skills (literacy and numeracy) and character, starting from school principals and teachers. This program is an evolution of the previous school conversion program. This program will also advance public/private schools in all school conditions one or two steps forward. The program is implemented in stages and integrated into the school ecosystem until all schools in Indonesia become driving schools. SMP N 19 is one of the second-generation schools in the Riau Islands, and this school is in Kelong village, located in the coastal area of Bintan. Given the conditions of coastal areas, schools choose P-5 activities tailored to the cultural conditions of coastal communities and student characteristics. Most of the students’ parents’ jobs are as fishermen. The P-5 topics chosen at this school are adapted to these conditions. The P-5 theme that has been implemented has 2 maritime themes; theme 1 is “Local Wisdom” with the title The Fun of Making Fish Traps at my School, and theme 2 is “Entrepreneurship: with the title Fish Processing and Preservation, building an entrepreneurial spirit from an early age. Theme 3 is still local wisdom with the title “My marine waste is valuable” through the P-5 themes, which are implemented as a form of school providing education to students to get to know the culture of coastal communities.
Ethnomathematical Study on Traditional Wedding Hantaran: 44-Fold Cloth from Lingga Regency
Authors: Febrian Febrian , Astuti Puji , Prabawani Repi , Anita Mutiara , Wulansari Fanny , Monalisa Putri , Nadila Nadila
Published: December 2023

Several cultures in the Riau Islands Province are closely related to mathematics, but many people are unaware of this. Therefore, researchers are interested in further researching the mathematical practices found in the culture of Lingga Regency, Riau Islands, namely in making 44-fold cloth. There are indications of mathematical activities in making process of this traditional wedding hantaran. This research aims to describe the results of ethnomathematics research in making 44-fold cloth in Lingga, Riau Islands, including mathematical activities and concepts. This qualitative research uses an ethnographic approach. Data was collected through observations, interviews, and documentation to identify mathematical activities and concepts behind making 44-fold cloths. The researchers are the main instrument in this study. The data obtained from the instruments were analyzed based on data analysis for ethnographic qualitative research. The research results show embodied mathematical activities in making 44-fold cloth: measuring with standard units, folding with standard fold lines (axis of symmetry), and counting. Meanwhile, there are rooted mathematical concepts such as length measurement, plane figure, fold symmetry, rotation symmetry, angle, congruency, and basic numbers in making 44-fold cloth. This study suggests for using common occurrences to teach mathematics as a foundational subject before formal mathematics instruction.
Coastal Students’ Perspectives Regarding the Utilization of Online Learning Platforms
Authors: Subroto Gatot , Agust Satria
Published: December 2023

In today’s school, online learning platforms are necessary. They might not be adequately represented in educational institutions, though. Understanding coastal students’ perspectives regarding the utilization of online learning platforms is the main objective of the study. For this study, the authors employed a descriptive qualitative approach. 32 social science students of Senior High School 2 Tanjungpinang took part in responding to the interview. Based on the findings, some coastal students think that adopting online learning platforms is not the best option. Although 60% of students claim that online learning has been well received, they are nevertheless disrupted by unstable signals. In the meantime, 40% of students respond negatively despite signal interference. There are various challenges, such an unstable network and the restricted devices, like smartphones and computers, that prevent students from understanding the lessons that their teacher is teaching. However, students who use online learning systems effectively find it easier to repeat lessons because the materials may be neatly restored. Online learning, according to some students, is more time efficient. As a result, they learn about modern technology and experience something new by utilizing online learning platforms.
Development Of Indonesian Language Teaching Modules Maritimely Based On The Independent Curriculum At Smp Negeri 1 Bintan School Year 2022/2023
Authors: Elfitra Legi , Wahyusari Ahada , Leo Shanty Isnaini , Testy Ariance Loren Fabio , Lolita Asri , Patria Robby , Andheska Harry
Published: December 2023

This research aims to develop a teaching-based module on maritime affairs in the curriculum independent Bintan State First Middle School 1 by measuring the validity and practicality of the media being developed. The model is a 4D model which starts from the definition stage, the design stage, to the development stage. The media developed by researchers is in the form of audio-visuals which will be validated by three experts, namely material experts, media experts, and experts language. The data collection techniques are interviews, media validity questionnaires, and media practicality questionnaires. Furthermore, the data analysis technique in this research is the quantitative descriptive data analysis technique. The result of this research is a maritime-based teaching module in the curriculum with the validation percentage of material experts reaching 98.8% with the qualification “very valid” media experts reaching 89% with the qualification “very valid”, and experts Language reaching 92.6% “very valid”. After that, trials were carried out on small groups with a percentage reaching 84% with the qualification “very practical” and large group trials reaching 85% with the qualification “very practical”. This research can be used as a reference for further researchers to determine the effectiveness of teaching-based modules on maritime affairs in the curriculum independently.
Bioaccumulation of Lead (Pb) in Green Mussels (Perna Viridis) in Indonesian Waters
Authors: Sari Martin Argustina , Edelwis Tri Widya , Pardi Hilfi
Published: December 2023

The environment is a place for the survival of living creatures which has an important role. Furthermore, pollution is a problem in the environment and really needs to be addressed because it can cause damage to the environment and ecosystem. Pollution that is very dangerous for life is heavy metals such as lead (Pb) in the sea. Green mussels (Perna Viridis L.) are examples of marine creatures in the bivalve group that can accumulate heavy metals and can be used as bioindicators of water pollution. The aim of this literature review is to determine the bioaccumulation of the heavy metal lead (Pb) in green mussels (Perna Viridis L.) in Indonesian waters. In the process of preparing this journal review, the method used is the comparative method. The results of the research that has been carried out show that green mussels contain the highest concentration of lead (Pb) in the waters of Jakarta Bay at 29.4 mg/kg, because Jakarta is a densely populated area and there are many industries in the city, followed by the concentration of green mussels. which was found in Badung Market, Bali at 28.878 mg/kg, then in the waters of Tambak Lorok, Semarang with levels of 8.0665 mg/kg.
Increasing the economic efficiency of the cotton complex in a market economy
Authors: Khalikov Tolibjon , Metelenko Natalya , Urazov Komil , Shirinov Uchkun , Yekimov Sergey
Published: December 2023

Uzbekistan has a fairly high economic potential for the development of agricultural production, the formation of the necessary food resources and the development of a raw material base for the processing industry. In recent years, despite the favorable situation in the world textile market, the development of the country's cotton complex is characterized by instability and decline, market transformations in the cotton complex have led to disintegration and a significant imbalance in its functioning. The development of monopoly structures in the field of sales of the industry's products is accompanied by distortions in the pricing system. The intra-industry disunity of the enterprises of the cotton complex does not allow rational use of the existing opportunities for the dynamic development of raw cotton production, its deep processing and increasing the efficiency of the cotton complex. Currently, only a tenth of the produced cotton fiber is processed in the republic, and the rest is exported outside the country.
Institution for the provision of amateur and sport fishing in Ukraine
Authors: Toryanyk Volodymyr , Novitskyi Roman , Bajdak Leonid , Rodinskyi Viktor
Published: December 2023

Amateur and sports fishing, as a new, promising type of tourism in Ukraine, as well as legislative and promising acts of its regulation and management were studied. The development of «green» tourism is one of the most relevant, at the present time, in Ukraine. For many developed countries of the world, the development of the recreational industry is one of the main sources of income for the state budget. Recreational fishing and fishing tourism are popular and highly profitable industries in the field of tourism and entertainment services. The most popular fishing tourism countries are Great Britain, Panama, Turkey, USA, Venezuela, Mexico, Australia, Finland, Norway. In the US, for one dollar spent in recreational fishing, the average income is about 17 dollars. The recreational industry can become such for Ukraine, which has all the prerequisites for its development. Ukraine has a unique natural resource potential for effective recreational fishing. The contribution of scientists of the Dnipropetrovsk Hydrobiological School of technologically transformed freshwater ecosystems to the study of the processes of formation and development of amateur (recreational) fishing in Ukraine is emphasized. These studies fit well into the global trends of scientific interest in the rapid growth of the popularity of “green” tourism (in particular, water activities, fishing tourism, recreational fishing).
The effect of some pesticides on lipid peroxidation and on the content of cytochrome p-450 of mitochondrial membranes and liver microsomes of pregnant rats and their embryos
Authors: Tuychieva D. , Mirkhamidova P. , Shakhmurova G.A. , Zhumagulova K.A.
Published: December 2023

The article presents data obtained in experimental studies on the effect of pesticides - butylcaptax and droppa on lipid peroxidation of mitochondrial membranes and microsomes of liver cells of pregnant rats and their embryos. It has been shown that inoculation with pesticides intensifies NADP.H- and ascorbate-dependent LPO both in mitochondria and in liver microsomes of pregnant rats and their embryos. The level of MDA is higher in case of poisoning with butylcaptax on the 3rd day of pregnancy. A decrease in the content of the microsomal enzyme P-450 in the microsomal fraction of the liver of pregnant rats was also found with the introduction of butylcaptax and dropp. This decrease is more pronounced on butylcaptax poisoning on the 3rd and 19th days of pregnancy.
Secondary salinization of soils and ways to prevent downstream of the Amu Darya
Authors: Namozov H. , Khozhasov M. , Sapaev B.
Published: December 2023

In the history of irrigated agriculture there are many cases when due to severe soil salinity the yield was so low that it did not justify the costs incurred for cultivation of crops. Such lands were classified as unsuitable and were left without use for crops. Lands from suitable ones turned into unsuitable ones and were also often left out of use for irrigated crops, thus, among the old irrigated land masses there were many fallow lands, fallow fields and other vacant lands. The growth of salinity of irrigated soils in the Central Asian republics in the last 30-35 years has become almost ubiquitous. Both old and new irrigation systems bear heavy losses from growing soil salinity. More often secondary salinization in irrigated soils begins to appear even at relatively deep groundwater (3.5-4) in the form of seasonal (during summer) spot salinization of soils on microrelief elevations, on spots of irrigated fields bare from cultural vegetation.
The biochemical effects of the coordination compound of cobalt-ii nitrate quinazolin-4-one with 3-indolyl acetic acid in the “amber” plants grades phaseolus aureus
Authors: Sapaev B. , Saitkulov F.E. , Khalikov A. , Ganiev A.S.
Published: December 2023

The biochemical effects of the coordination compound of cobalt-II nitrate quinazolin-4-one with 3-indolyl acetic acid in the “amber” plants grades Phaseolus aureus have been studied. Cobalt is an important trace element for plants and an important biogenic element in the soil, mainly in the form of the Co2+ cation, which participates in redox reactions in plant organisms for the implementation of various mineral and organic compounds. Cobalt compounds are mainly soluble in mineral acids, so we want to show that the coordination compound containing this trace element, formed by the nitrate salt with quinazolin-4-one, serves as a source of plant nutrition.
Effectiveness of using electrochemically activated water with an acidic medium in breeding grain moth (cytotroga cerealella oliv) in biolaboratories
Authors: Abdullaev Murodjon , Akramov Nematjon , Mirzaeva Guljaxon , Tursunov Muzaffar
Published: December 2023

The article presents, the harmful microorganisms in the air of the biolaboratory room and in the barley prepared for damage were determined during the reproduction of the eggs of the grain moth (Cytotroga cerealella oliv) used in the production of trichogram in biolaboratory conditions. The results of the study on the use of electrochemically activated water with an acidic environment (pH=3-3.5) to infect the identified microorganisms in the room air and to normalize grain moisture at the stage of contamination of barley grain with cytrago larva during the breeding process of grain moth eggs.
Geoecological monitoring of regional land use: Definition and directions of formation
Authors: Bieliatynskyi Аndrii , Sorokina Kateryna , Mamonov Kostiantyn , Kovalenko Lyudmyla
Published: December 2023

It has been proven that modern trends in land formation and use require a rethinking of approaches to the development and implementation of monitoring tools, taking into account the ecological features of regional development. The need and relevance of solving issues related to the formation and use of geoecological monitoring of land use at the regional level has been established. The purpose of the study is to determine the directions and features of the formation and implementation of geoecological monitoring of land use in the regions. To achieve the goal, the following tasks are solved: systematization of theoretical provisions regarding the definition of geoecological monitoring of land use at the regional level; substantiation of the integral method of assessment of the formation and implementation of geoecological monitoring of land use; formation of the quantitative basis of geoecological monitoring. As a result of the study, a theoretical platform was developed for the definition of geoecological monitoring of land use, which is based on a systemic approach that includes interrelated stages and is formed on the basis of a quantitative basis for the construction of monitoring GIS maps in the context of informed decision-making. To form a quantitative basis for geoecological monitoring, the use of an integral method is proposed, which includes a set of interconnected elements that determine environmental and land use factors, which made it possible to improve the monitoring system and provide modeling of the presented factors to establish cause-and-effect relationships.
Methods for optimizing data processing based on fuzzy adjustment of time series elements and identification model variables
Authors: Siddikov Isamidin , Mamasodikov Yusufjon , Mamasodikova Nodira , Khujanazarov Ulugbek
Published: December 2023

The problem of optimal identification and processing of random time series (SVR) based on the properties of statistical, dynamic, and fuzzy models is formulated. A method for qualitative identification of SVR is proposed, which includes algorithms for fuzzy equations, logical inferences, taking into account the effects of environmental factors and non-stationary processes. A generalized algorithm for identifying SVR with adjustment and correction of variable values based on the rules of fuzzy logic, methods for searching for extrema by t -norms and s -norms is developed. Tools are designed for optimal data processing by determining an adequate model; parametric and structural identification of objects; search optimization; model training; identification of the “input and output” relationship; formation and use of a knowledge base, as well as sets of fuzzy rules, linguistic variables, membership functions, and algorithms for regulating variable values. Methods of fuzzy correction of distorted information by controlling the error of SVR identification are developed, and a software package is implemented that provides high accuracy of data processing with significantly lower costs.
The share of young people in the population of Uzbekistan and their entry into the labor market
Authors: Otakuzieva Z.M. , Askarova M.I.
Published: December 2023

The article analyzes the scientific approaches of scientists studying the labor market and the youth labor market, the population of Uzbekistan, the working age population and the share of young people in it. There is a growing number of young people entering the labor market, problems in the labor market, problems in finding a job in their specialty. The main reasons for the lack of professional knowledge of young people, their lack of opportunities and skills compared to the older generation, and their solutions are explained.
Assessment of the efficiency of public-private partnership in the service sector
Authors: Arabov Nurali , Sukhorukova Anna , Voloshyna-Sidei Viktoriia , Khomitov Komiljon , Nasimov Dilmurod , Ismailov Bakhit , Bakayev Ziyovuddinkhon
Published: December 2023

Public-private partnership mechanism in the investment process the the service sector is becoming very attractive in developing countries. Therefore, public-private partnership is an important tool for ensuring the socio-economic development of the country and an important source of financial resources for investment projects that retain control of public authorities and cooperate with investors. The paper studies the methodology for evaluating the effectiveness of public-private partnership in the service sector, the forms and conditions of mutually beneficial relations between partners, the goals and objectives of the public-private partnership project, cooperation through public and private sector assets and management skills, and public-private partnership. Furthermore, the paper analyzes expected obstacles and limitations of the private partnership, the process of organizing cooperation projects, assessment of project effectiveness and the impact of economic risks on it, key indicators for determining the effectiveness of the investment project, integrated economic efficiency of the investment project, budget efficiency in public-private partnership.
Strengthening of brickwork composite reinforcement cage
Authors: Akramov Khusnitdin , Davlyatov Shokhrukh , Nazirov Ayubkhon
Published: December 2023

The article discusses methods of strengthening brickwork using composite materials. These techniques have not been widely used in Uzbekistan due to the lack of a regulatory framework that would regulate their use. The article analyzes the existing methods of reinforcement of brickwork, and also suggests a method for calculating these methods of reinforcement with conclusions and recommendations based on it. The purpose of the work was to review the technology and analyze the advantages and disadvantages of each of the methods that should be used when choosing solutions to strengthen masonry. In conclusion, the need for further tests was confirmed in order to confirm the theoretical conclusions with practical results.
Assembled - monolithic block media systems analysis, calculation method and technology
Authors: Abdullaev Ibrahim , Alakhanov Zakir
Published: December 2023

The article presents an analysis of prefabricated monolithic ceilings (SMP) of various manufacturers, which have received the most widespread use. The task of reducing the weight of building structures while maintaining the bearing capacity is relevant in modern construction. Prefabricated monolithic construction systems correspond to modern trends, but require special attention and study. The article presents an analysis of the advantages and disadvantages of prefabricated-monolithic slab structures, identified and identified problems of use that require further detailed study to ensure the reasonable use of SMP structures in the construction of buildings and structures.
Optimization of the composition of fiber foam concrete with polypropylene fiber Fox Polfiber M12 produced by basf company
Authors: Ilyasov Allanazar , Adilkhodjaev Anvar , Makhamataliev Irkin , Allamuratov Allambergen
Published: December 2023

The results of experimental studies on optimizing the composition of non-autoclaved fiber foam concrete with polypropylene fiber Fox Polfiber M12 produced by BASF (Germany) and on determining its properties are presented in the article. A pattern was established for a decrease in shrinkage strain in non-autoclaved fiber foam concrete with an increase in the content of polypropylene fiber by weight and a reduction in cement consumption. At that, the least shrinkage strains in samples of fiber foam concrete were observed at a minimum content of mineral filler –micro-silica.
Strength and uniformity of composite reinforced columns
Authors: Akramov Khusnitdin , Davlyatov Shokhrukh , Kimsanov Bakhromjon
Published: December 2023

Development prospects reinforced concrete are inextricably linked with the use of both new materials and and their combinations with already proven traditional materials. Transition of construction to non-metallic composite reinforcement will help reduce operating costs for structures, located in aggressive environments and reduce the cost of living design cycle due to extended repair intervals. Yes, according to research shows reduced life cycle costs structures with composite non-metallic reinforcement can reach 53–205% over 100 years compared to a similar design with traditional steel reinforcement. At the time of this study, there was no method calculation of centrally compressed concrete elements reinforced glass composite fittings. The development of such a methodology will allow correctly assess the load-bearing capacity of compressed elements with composite reinforcement. The use of non-metallic, and mainly glass-composite, reinforcement in building structures has previously been insufficiently studied due to its relatively high cost. Currently, in our country there is a lack of research into compressed structures with glass-composite reinforcement. The need to study the operating features of such structures, as well as insufficient knowledge of the influence of glass-composite reinforcement on the strength and deformability of compressed glass-composite concrete elements determined the relevance of this study.
The influence of superplasticizers on the porous structure and thermal conductivity of lime foam concrete waste
Authors: Abdullaev Ibrahim , Abdullaev Ulugbek
Published: December 2023

the results of laboratory experiments are presented, where the use of lime waste (sludge) in foam concrete and the possibility of their use as a filler for foam concrete are analyzed. It is shown that the total porosity, thermal conductivity and structural quality of foam concrete with waste lime were taken as parameters of the porous structure.
Study of negative friction forces in laboratory conditions
Authors: Baxromov Maxmud , Dusmatov Abduraxim , Akhmedov Akhadjon , Axmedov and Tulqinjon
Published: December 2023

The article laboratory studies are presented to determine the magnitude of negative friction forces on the lateral surface of model piles and the patterns of action of negative friction forces in the spectrum of factors influencing the magnitude of these forces are identified.
Crack resistance of bent concrete structures with fiberglass reinforcement
Authors: Mirzababayeva Saxiba , Abobakirova Zebuniso , Umarov Shodiljon
Published: December 2023

This article presents experimental data on the appearance and development of normal and oblique cracks in relation to the longitudinal axis of the element under the influence of transverse loads on bending concrete beams equipped with shishaplastic Composite fittings made of ordinary heavy concrete.
Psychological consequences of environmental crises for the individual
Authors: Aharkov Oleh , Prisniakova Liudmyla , Pashko Antonina , Tarasevych Inna
Published: December 2023

The research found that the psychological consequences of environmental crises can be diverse and include the following aspects: stress and anxiety, deterioration of physical and mental health, feeling of helplessness and fatigue, change of attitude towards nature. The study shows that overcoming these negative psychological consequences of environmental crises is possible with the help of psychological, educational, personal strategies and strategies to reduce the negative impact on the environment. Psychological strategies for overcoming the psychological consequences of environmental crises include therapy and group support. Therapists help people understand and manage their emotions, develop strategies for coping with stress and anxiety, and work to restore mental health. Support groups bring together people who have experienced similar environmental events or have a common experience of stress and traumatic situations. In group therapy, people can share their feelings, experiences, and coping strategies. Environmental education encourages concrete steps to reduce human impact on nature and preserve natural resources. This includes promoting sustainable consumer practices, participating in volunteer initiatives, supporting environmental organizations and initiatives, and developing environmental awareness. Strategies for the development of personal resources include strengthening resilience and self-assertion, psychological readiness for change, and self-reflection. Strategies for reducing environmental negative impact involve taking effective measures to prevent environmental crises and reduce their consequences.
Control system for personnel, fuel and boilers in the boiler house
Authors: Kukartsev V.V. , Dalisova N. , Muzyka P. , Yarkova S.A. , Degtyareva K.V.
Published: December 2023

This paper tackles the pressing issue of insufficient automation in the boiler room industry, specifically concerning the crucial tasks of data collection and analysis pertaining to boiler status, fuel levels, and employee activity. Presently, these tasks often demand significant manual efforts, resulting in inefficiencies and potential errors. To address this challenge, the paper proposes the development of an innovative and cutting-edge system that aims to revolutionize the industry’s operations. The proposed system promises to seamlessly integrate and consolidate vital information related to fuel consumption, boiler performance, and employee actions into a unified and compact platform. By doing so, it endeavors to enhance overall efficiency, optimize resource allocation, minimize downtime, and improve decision-making processes. This new system’s successful implementation could potentially lead to greater productivity and safety standards within the boiler room industry, ushering in a new era of streamlined and automated operations.