Scientific Research Institute Research Articles

Determination of the cover coefficient for soil surfaces of the runoff of residential areas

Due to the constant increase in tariffs in the field of public utilities, the problem of the need for accurate calculation of the volume of surface runoff is becoming more acute, which must take into account not only the landscape features of the area, but also the water-absorbing properties of the soil and coatings. The purpose of this work is to determine the coefficient of coverage zi for the most characteristic types of natural and artificial surfaces. The scientific novelty lies in the refinement of the existing methodology set out in the “Recommendations of the State Scientific Research Center of the Russian Federation FSUE Scientific Research Institute VODGEO”, in particular, the establishment of a mathematical dependence of the value of the coefficient of cover zi on the fractional composition of the soil to determine the coefficient of surface runoff Ψ, on which commercial calculations for the drainage of rain and meltwater into the storm sewer system are based.

Role of Lower Eyelid Reconstruction in Complete Functional Rehabilitation

Objective: To present a case of reconstruction of a full-thickness lower eyelid defect.Case report: Male patient Y. aged 71 years was admitted to the Scientific Research Institute – Ochapovsky Regional Clinical Hospital No. 1 (Krasnodar, Russian Federation) with the diagnosis: cancer of skin of the lateral canthus of the left eye, T1N0M0, stage I, clinical group II. According to the medical history, the neoplasm was self-detected 5 years ago. Histology findings revealed micronodular basal cell carcinoma.After a general clinical examination, the patient underwent surgery to remove the neoplasm of the lower eyelid skin and lateral canthus and reconstruct the defect using a lateral infraorbital fat pad flap, local tissues, and a free autologous cartilage graft. The configuration of the soft tissues of the eyelid was restored. Soft tissue edema was not observed. The functional state of the lacrimal apparatus was fully preserved. The esthetics of the soft tissue was rehabilitated.Conclusions: Reconstruction in such esthetically significant area as the middle third of the face is associated with special requirements for graft formation and positioning. A gentle and functionally justified method for restoring the parameters of the tarsal plate, conjunctival sac, and lower eyelid skin ensures complete rehabilitation of patients and improves their quality of life.

Geography of Distribution of Malus Varieties in Azerbaijan Depending on Soil

More than 6,000 plant species have been identified in the Caucasus, of which 4,200 species (70%) are common in Azerbaijan. 11% are trees and shrubs, and 9% are endemic plants. There are more than 280 local varieties and forms of apple trees in Azerbaijan. After the 1920s, the area of ​​fruit orchards in Azerbaijan was expanded to 21 thousand hectares due to local varieties, of which 13 thousand hectares (62%) were apple orchards. In 1926, the Azerbaijan Scientific Research Institute of Horticulture, Viticulture and Subtropical Plants was established in Azerbaijan with the aim of developing fruit growing. New varieties of apple trees are created through selection. Due to the newly created varieties through selection, apple orchards in Azerbaijan have significantly developed. In 1976, 13 thousand hectares of new industrial apple orchards were planted. Since 1982, the existing gene pool of apple trees has been studied.

Estimation of the adaptogenic potential of melatonin on salinity resistance of spring wheat seeds and sprouts

The current paper is devoted to the study of melatonin as an adaptogen capable of increasing wheat tolerance to stress caused by excess levels of easily soluble salts in the environment. The purpose of the study was to evaluate, within the framework of a laboratory model experiment, the ability of melatonin to increase seed germination and stimulate growth processes in wheat sprouts against the background of salinity. The study was conduc ted at the FSBI All-Russian Scientific Research Institute of Agrochemistry named after D.N. Pryanishnikov in 2024. The study objects were seeds of the spring wheat variety ‘Darya’. Before the experiment, the seeds were treated with aqueous solutions of melatonin in concentrations of 0; 0.01; 0.1; 1 and 10 mg/l using the priming method. Distilled water and a 150 mM sodium chloride solution were used as background solutions for germination. As a result, there has been shown that within the framework of the experiment, there is an increase in seed germination against the background of treatment with melatonin solutions in concentrations from 0.1 to 10 mg/l against a saline background. Seed treatment with melatonin has demonstrated a pronounced growth-stimulating effect on wheat sprouts, especially in relation to the root system. However, the strength of this effect was somewhat reduced on a saline background compared to control conditions. There was a maximum growth-stimulating effect of melatonin on both backgrounds when using a solution with a concentration of 1 mg/l. There was also established that priming seeds with melatonin promoted water retention in seedling root cells, which may be one of the mechanisms for increasing plant resistance to salinity.

Updates on the feasibility of utilizing e-learning to sustain medical radiation technology education in light of the escalating conflict in Sudan.

The purpose of the following paper is to offer an update on the feasibility of using e-learning to sustain medical radiation technology education in light of Sudan's ongoing crisis. The Sudanese acting Minister of Higher Education and Scientific Research issued a resolution on October 7, 2023, to reopen higher education and scientific research institutes, as well as resume all academic activities at both governmental and private higher education institutions, effective October 15, 2023. Unfortunately, due to infrastructure deficiencies and a lack of appropriate capabilities to resume face-to-face teaching of medical radiation technology in Sudan's safe states, the majority of universities, including several medical radiation technology colleges, have decided to continue the educational process via e-learning. However, Sudan's e-learning system, currently the sole means of maintaining medical radiation technology education, suffers from significant flaws. If these challenges persist, students may graduate with a limited theoretical and practical grasp. Furthermore, the implementation of this style of education deprives eligible students, particularly those living in conflict zones, of the educational opportunities they require in light of the increased threat of war continuation.

Estrogen blood profile of chickens in the studied period of the ovulatory cycle

The aim: to study the dynamics of the concentrations of estradiol, estriol and estrone, their ratios in the studied period of the ovulatory cycle and the connection with the size of egg yolk.Materials and methods. The material for the study was chickens of the Pushkin breed, in the amount of 36 birds. at 36 weeks of age. The chickens were kept in individual cages. Light mode — 14C:10T. Watering — nipple, temperature in the poultry house and feeding - in accordance with the standards adopted by the Central Collective Use Center of the All-Russian Scientific Research Institute of Growing Animals "Genetic collection of rare and endangered breeds of chickens". Over the course of 7 days, eggs from 96 chickens of 30 weeks of age were assessed by the weight of the egg, yolk, white, shell - using electronic scales Mertech M-ER 122ACF(JR) with an accuracy of 0,01 g. Eggs were counted and assessed individually: From each hen, at least 3 consecutively laid eggs were examined the next day after collection. Based on the data obtained from assessing chickens based on the quality characteristics of eggs and productivity, 36 birds with egg yolk weights M-0,5σ, M±0,45σ, M+0,5σ were selected. Blood from the studied chickens was taken in the morning and during the day on an empty stomach to simultaneously determine the concentrations of estradiol, estriol and estrone 2 hours before laying eggs and within 4 hours after laying, with an interval of 1 hour. In order to obtain serial blood samples from chickens for Dynamic studies of estrogens included the installation of peripheral venous (intravenous) catheters. The concentration of estrogen in the blood plasma of chickens was determined by ELISA.Results. The concentrations of individual estrogenic hormones change during the 6 hours of the studied period of the ovulatory cycle, periodically increasing and decreasing, while the fluctuations coincide only in two periods after the egg is laid: after 1—2 hours — a rise and 2—3 hours — a decline. Of the six studied periods of the ovulatory cycle of chickens, the time period of practical interest is 2—1 hours before egg laying, when the ratio of estradiol:estrone was 7,4:1, estriol:estrone — 7,9:1 and estradiol:estriol — 1:1. During this period, a positive significant correlation was revealed between the estradiol:estrone ratio and the yolk mass of chicken eggs — +0,55 (p <0,05). Also, in the established period, the highest concentration of estradiol (1,52±0,12 nmol/l), estrone (0,29±0,04 nmol/l) was simultaneously observed compared to other periods, and the lowest concentration of estriol (1,67± 0,16 nmol/l). A positive correlation was determined between estradiol and estrone — +0,68 (p <0,05) and estradiol and estriol — +0,71 (p <0,05).Conclusion. In the period 2—1 hours before laying eggs, the effect on the body of chickens of estrogenic hormones in the ratio estradiol: estrone 7,4:1, estriol:estrone – 7,9:1 and estradiol:estriol — 1:1 leads to inactivation of synthetic systems, providing intensive formation of ovogenic substances by the liver (vitellogenin, lipoproteins), and the transfer of vitellogenic material into developing follicles.

Functional preference and spatial response of urban renewal entities in Beijing

In the process of rapid urban renewal, quantitative research on functional preferences and spatial layout norms of multi-type urban renewal entities is crucial for optimizing spatial governance and promoting orderly control of urban renewal. We investigate urban renewal in Beijing from 2006 to 2021 using directional distribution, spatial autocorrelation, and hotspot analysis. The findings are as follows: (1) The functional preference of each type of entity differs. While most private companies and other profit-oriented entities concentrate on producer services and residential functions, policy-oriented entities dominate the urban regeneration of public service activities. (2) Every entity shows a significant agglomeration characteristic, yet exhibits a differentiated spatial response pattern. Those entities with stronger leasing ability prefer the central zone while others are the opposite. (3) Diverse types of entities have differentiated spatiotemporal evolutions. The spatial directional divergence of state-owned enterprises and scientific research institutes has increased between 2006 and 2021. This is mainly influenced by the policy of relieving Beijing of nonessential functions. However, the rest entities show a balanced spatial development trend with the difference in each direction becoming smaller. Furthermore, the center of gravity of profit-oriented entities has shifted from the suburbs to the central zone due to a combination of administrative and market forces, whereas the center of gravity of policy-oriented entities tends to move outward from the central zone.

The Experience Using of Freeze-Dried Mulberry Leafs’ as Composition of Artificial Diet for Feeding Silkworm Caterpillars

Aims: Due to changes in the global climate and the recent increase in spring frosts, which lead to the death of silkworm caterpillars of the first ages due to lack of food, there is an urgent need to find effective and cheap means to replace natural food - mulberry leaf. One of the promising methods is the preservation of mulberry leaf. One of the new and progressive methods of preservation is the method of freeze-dried of mulberry leaf, for the basis of artificial diet. Place and Duration of Study: The experiments were conducted in the laboratory of the Scientific Research Institute of Sericulture in 2024y. Methodology: After hatching, the caterpillars were fed artificial food based on freeze-dried mulberry leaf, the food was given once a day, the room temperature was 25-26 ° C, humidity 65-70%. When the caterpillars reached the third age, some of the caterpillars of each breed and hybrid were selected and continued to be fed with artificial diet. The remaining caterpillars were transferred to natural leaf feeding according to a generally accepted method. Results: The drying time of the mulberry leaf in the freeze-dried mode was 14-18 hours, depending on the uniformity of the leaf layer in the chamber. A recipe for artificial diet was created, in which the content of mulberry leaf powder was 72%. All breeds and hybrids equally well received the developed artificial diet. In breeds and hybrids, the viability of caterpillars was 82-100%. And when switching from artificial diet to a natural leaf, the viability of caterpillars was 63-93%. Conclusion: All breeds and hybrids equally well accepted the developed artificial food based on freeze-dried mulberry leaf. According to the totality of the results shown, the studied breeds and hybrids are promising for feeding them on artificial feed and breeding appropriate lines and breeds from them.

Visual analysis of postmortem interval estimation trends and collaborative networks: a 15-year study (2006-2020).

Utilizing a visual analysis of the literature on postmortem interval (PMI) estimation indexed by Web of Science (WOS), this study investigates developmental trends and research hot points across each 5-year period from 2006 to 2020. Additionally, collaborative efforts among authors, countries, and institutions were examined. Research hot points, high-frequency keywords, authors, countries and institutions in relevant papers were analyzed using CiteSpace.5.7.R2 information visualization analysis software over the past 15 years. The literature related to PMI estimation has witnessed consistent growth over time. In the keyword co-occurrence network, several impactful terms stand out, including blowfly, mitochondrial DNA, and emerging concepts like virtual autopsy. Technological advancements, such as RNA stability analysis and virtual autopsy tools, have played a pivotal role in shaping the direction of PMI research. Scientific research institutions dominate the high-frequency affiliations within the institutional cooperative network. Additionally, the country cooperative network exhibits a trend of co-occurrence and multi-clustering. As science and technology continue to advance, traditional PMI estimation methods mature while novel interdisciplinary approaches drive innovation. By identifying emerging trends and research hotspots, this study provides a roadmap for future investigations, guiding researchers toward new opportunities in PMI estimation.

The state of psychological and immunological indicators in graduate students of a medical university

Training future doctors for professional practice usually entails building awareness and embracing the significant responsibility inherent in the field. This, in turn, leads to significant psycho-emotional stress by the time of graduation from academic institution. With the aim of identifying the correlation between homeostatic system indicators, a comparative analysis was conducted to characterize the immunological and psychological parameters of final-year medical university students, contingent upon their respective training programs. The study involved sixth-year students of the Therapeutic and Preventive Faculty [TPF] (29 individuals) and the Military Training Center [MTC] (34 individuals) of Rostov State Medical University, a Federal State Budgetary Educational Institution of Higher Education. The exclusion criteria for all participants included the presence of chronic diseases and any infectious process of any origin within three months prior to the study. The groups were similar in terms of age (23.8±1.82 and 23.9±2.2 years, respectively), gender (all male), and corresponded to health group I. Psychological evaluation was conducted employing the Spielberger–Hanin Scale to gauge levels of personal and situational anxiety. The assessment of immunological status was carried out at the Scientific Research Institute of Clinical Immunology using standard methodological approaches. Registration cards for immunopathology analysis were used to characterize health status over the year. Analysis of the obtained data from psychological questionnaires revealed that students of the Therapeutic and Preventive Faculty, compared to their counterparts from the Military Training Center, demonstrated a higher degree of situational and, particularly, personal anxiety. Differences in the immune response system between the compared groups were identified with regards to indicators that characterize both adaptive and innate immunity. These differences were expressed in a more significant number of circulating regulatory T lymphocytes, a less pronounced lytic potential of effector cells, a greater number of TLR9+ monocytes with a decrease in the proportion of cells of the monocyte series carrying HLA-DR in medical students compared to their counterparts studying in the medical service officers’ program. Thus, the period of psychological preparation in a medical university for the commencement of professional activity varies based on the characteristics of the educational process and proves to be more effective for sixth-year students of MTC. Students from the TPF exhibit more pronounced psycho-emotional stress compared to their counterparts in military medical training, leading to evident signs of immune system dysregulation. It is imperative to develop strategies for timely detection of changes in both psychological and immunological adaptive capacities.

Studying the Transmission of Height Traits in Second Generation Reciprocal Wheat Hybrids

The presented article presents the results of a study of height inheritance in reciprocal hybrid combinations of the second generation (F2) of common wheat. The research was carried out in the 2020–2021 growing season at the experimental site of the experimental base at the Scientific Research Institute of Agriculture of Azerbaijan under irrigation conditions. In the year of research, the heights of 9 local varieties (Azeri, Gobustan, Fatima, Gyrmyzy gul-1, Murov-2, Askeran, Matin, Onur and Mirbashir-128) of soft wheat were studied, which were used as the parent form and 32 reciprocal combinations of the second generation. The degree and frequency of transgression was determined. During the growing season, agrotechnical work was carried out in accordance with the accepted methodology. In terms of height, the studied samples belonged to semi-dwarf (51.0-80.0 cm) and medium-sized (81.0-110.0 cm) varieties and combinations. Plant height in parental forms ranged from 70.0-97.0 cm. In hybrid combinations, plant height ranged from 60.0-95.0 cm. 71.9% of combinations (23 pcs.) were semi-dwarf and 28.1% combinations (9 pcs.) an average increase was observed. Transgressive variability in plant height was calculated using the method of G. S. Voskresensky and V. I. Spot. According to the results of the study, negative transgression was observed in hybrid combinations of the second generation (F2), which were characterized by low dominance and heterosis in the first generation (F1). As a result of the study, it can be concluded that short-growing hybrids can be obtained by involving varieties of the same height in hybridization, and taller forms can be obtained by using short-growing varieties in hybridization. The reciprocal hybrids Askeran × Gobustan and Askeran × Murov-2 showed a negative level of transgression when using the Askeran variety as the maternal form.

80th anniversary of NIITIAG

The article is dedicated to the anniversary of the Scientific Research Institute of Theory and History of Architecture and Urban Planning (NIITIAG), which the Institute celebrates this year.

Atherosclerotic vascular lesion in the coal industry workers of average and high fatal risk groups

Introduction. Experts do not take into account the presence of subclinical atherosclerosis when stratifying risk on the SCORE scale, however, it is the main substrate for the occurrence of cardiovascular disasters. Most primary cardiovascular events occur in low cardiovascular risk groups, which requires timely detection of atherosclerosis and preventive measures to preserve the working population's ability to work and reduce the economic burden of treatment of cardiovascular diseases. The study aims to research the incidence of atherosclerosis in workers of the main professions of the coal industry in the South of Kuzbass in groups of medium and high risk of fatal events on the SCORE scale. Materials and methods. We divided the subjects into two groups using the SCORE scale: high-risk (main) — from 5 to 9%, which included 60 people, and moderate-risk group — from 2 to 4% (comparison) — 70 employees. The average age of the first was 50.98±0.43 years, the comparison group was 49.96±0.35 years (p=0.070). The scientists examined the indicators of blood pressure, lipid, carbohydrate and purine metabolism, and performed an ultrasound examination of the main arteries. Results. The incidence of atherosclerotic plaques in at least one vascular basin was 80.0% in the main group and 78.6% in the comparison group, p=0.845. The frequency of carotid artery atheromas in the high-risk group on the SCORE scale (52.7%) did not significantly differ from the comparison group (54.3%), p=0.862; a similar pattern in the arteries of the lower extremities: 80.0% vs. 70.0%, respectively, p=0.203. The frequency of carotid artery atheromas in the high-risk group on the SCORE scale (52.7%) did not significantly differ from the comparison group (54.3%), p=0.862; a similar pattern in the arteries of the lower extremities: 80.0% vs. 70.0%, respectively, p=0.203. The combination of thickening of the intima of vessels and the presence of atheromas tended to be more frequent in the main group — 83.6% compared with those in the comparison group — 70.1%, p=0.076 Limitations. The study is limited by the number of examined patients who underwent periodic medical examination at the Scientific Research Institute of Complex Problems of Hygiene and Occupational Diseases. Conclusion. The incidence of atherosclerosis among employees of coal enterprises turned out to be very high and did not statistically differ in the groups of medium and high fatal risk stratified on the SCORE scale, which requires more thorough screening and measures of enhanced angioprotective prevention, even in people with a low risk of fatal cardiovascular disasters. Ethics. All the subjects signed an informed consent to participate in the study, the Protocol of which corresponded to the requirements of the Bioethical Committee of the Research Institute of Complex Problems of Hygiene and Occupational Diseases, executed in accordance with the Helsinki Declaration of the World Medical Association "Ethical Principles of conducting medical research with human participation as a subject" as amended in 2013 and the "Rules of Good Clinical Practice" approved by the order Ministry of Health of the Russian Federation No. 200n dated April 1, 2016.

Overview of Key Technologies in Surgical Robots and Optimization Discussions

Surgical robot is the national strategic diagnostic and therapeutic equipment research focus, get a number of scientific research institutes, colleges and universities and enterprises pay extensive attention to the design and development of a variety of surgical robots, and registration declaration. This article explores the critical technologies of surgical robots and key areas for optimizing their performance, including kinematic positioning errors, pose errors, feedback model errors, image recognition positioning errors, path planning, and safety aspects. The findings not only provide a scientific basis for future standardization research on surgical robots but also offer significant theoretical and practical references for the research, manufacturing, and registration processes in the medical robotics industry.

Assessing the built environment through photographs and its association with obesity in 21 countries: the PURE Study

The built environment can influence human health, but the available evidence is modest and almost entirely from urban communities in high-income countries. Here we aimed to analyse built environment characteristics and their associations with obesity in urban and rural communities in 21 countries at different development levels participating in the Prospective Urban and Rural Epidemiology (PURE) Study. Photographs were acquired with a standardised approach. We used the previously validated Environmental Profile of a Community's Health photo instrument to evaluate photos for safety, walkability, neighbourhood beautification, and community disorder. An integrated built environment score (ie, a minimum of 0 and a maximum of 20) was used to summarise this evaluation across built environment domains. Associations between built environment characteristics, separately and combined in the integrated built environment score, and obesity (ie, a BMI >30kg/m2) were assessed using multilevel regression models, adjusting for individual, household, and community confounding factors. Attenuation in the associations due to walking was examined. Analyses include 143 338 participants from 530 communities. The mean integrated built environment score was higher in high-income countries (13·3, SD 2·8) compared with other regions (10·1, 2·5) and urban communities (11·2, 3·0). More than 60% of high-income country communities had pedestrian safety features (eg, crosswalks, sidewalks, and traffic signals). Urban communities outside high-income countries had higher rates of sidewalks (176 [84%] of 209) than rural communities (59 [28%] of 209). 15 (5%) of 290 urban communities had bike lanes. Litter and graffiti were present in 372 (70%) of 530 communities, and poorly maintained buildings were present in 103 (19%) of 530. The integrated built environment score was significantly associated with reduced obesity overall (relative risk [RR] 0·58, 95% CI 0·35-0·93; p=0·025) for high compared with low scores and for increasing trend (0·85, 0·78-0·91; p<0·0001). The trends were statistically significant in urban (0·85, 0·77-0·93; p=0·0007) and rural (0·87, 0·78-0·97; p=0·015) communities. Some built environment features were associated with a lower prevalence of obesity: community beautification RR 0·75 (95% CI 0·61-0·92; p=0·0066); bike lanes RR 0·58 (0·45-0·73; p<0·0001); pedestrian safety RR 0·75 (0·62-0·90; p=0·0018); and traffic signals RR 0·68 (0·52-0·89; p=0·0055). Community disorder was associated with a higher prevalence of obesity (RR 1·48, 95% CI 1·17-1·86; p=0·0010). Community built environment features recorded in photographs, including bike lanes, pedestrian safety measures, beautification, traffic density, and disorder, were related to obesity after adjusting for confounders, and stronger associations were found in urban than rural communities. The method presents a novel way of assessing the built environment's potential effect on health. Population Health Research Institute, Hamilton Health Sciences Research Institute, Heart and Stroke Foundation of Ontario, Canadian Institutes of Health Research's Strategy for Patient Oriented Research, Ontario Support Unit, Ontario Ministry of Health and Long-Term Care, AstraZeneca, Sanofi-Aventis, Boehringer Ingelheim, Servier, and GlaxoSmithKline.

Искусственный интеллект для планирования тактики ведения пациентов после перкутанной нефролитотрипсии.

Introduction. Urolithiasis remains one of the most common urological pathologies that deserves due attention in the healthcare system. A current direction in optimizing percutaneous nephrolithotripsy (PСNL) is a personalized prognosis for patient management based on artificial intelligence (AI) decisionmaking algorithms. In our work, we applied an algorithm to create the most optimal tactics for patient management after PCNL. Purpose. Optimize the management of patients after PCNL based on AI. Materials and methods. The total number of patients treated at N. Lopatkin Scientific Research Institute of Urology and Interventional Radiology andthose who took part in the study amounted to 1000 people. The number of men was 419 (41.9%), women 581 (58.1%). The age of patients included in the studies ranged from 18 to 88 years (52.3±13.47). The division into Training and Holdout partitions varied depending on the target variable to obtain the most accurate result. The maximum difference in the samples was 600n and 400n (60% and 40%), the minimum 800n and 200n (80% and 20%). Data processing was carried out using IBM SPSS Statistics and Modeler programs using the neural network modeling method. Results. The accuracy of prediction for the choice of nephroscope size was 82.2%, requirement for intraoperative stent placement 93.9%, requirement for ureteroscopy or contact ureterolithotripsy 98.5%. The accuracy of the forecast for the number of puncture accesses was 92.6%, for access through the upper group 95%, for access through the middle group 91.2%, for access through the lower group 91.2%. The algorithm allows us to predict the presence of residual stones with an accuracy of 84.1%, the duration of surgical intervention is 87.3% Conclusion. Further development of AI technology will not only provide a «second opinion» and reduce the time for processing large volumes of information, but will also standardize the approach to the treatment of complex clinical cases and help optimize the work of the urology department.

Analysis of hybrid potato populations in the conditions of the Magadan region

The priority direction in potato breeding in the Magadan region, given the short growing season and heat shortage, is the creation of predominantly early-ripening potato varieties. The article presents the results of the evaluation of potato breeding samples in terms of productivity and ripeness. Over two years, about three thousand samples of 67 hybrid combinations have been studied. The research was carried out in 2022–2023 on the experimental field of the Magadan Scientific Research Institute of Agriculture on floodplain, sod-alluvial, pebble-sandy loam soils. More than two thousand samples represented by 25 hybrid combinations were studied in the nursery of seedlings. Hybrid combinations characterized by a high frequency of selection of promising forms are identified, such as Arctica × Elbeida, Udacha × Bellarosa, Krone × Bellarosa, Charoite × Bellarosa, Krone × Labadia, Arctica × Gala. In these hybrid combinations, from 7.6 to 17.9% of the samples from the total number of the seedlings planted in the field were selected as clones. The samples with high productivity indicators were selected in the nursery of hybrids of the 1st year. The maximum weight of tubers of one plant was noted in the populations of Columba × Krepysh – 2010, Udacha × Bellarosa – 1820, Arctica × Elbeida – 1825, Charoite × Bellarosa – 1800. In the nursery of hybrids of the 2nd year, hybrids with productivity exceeding 1000 g/bush, such as Columba × Krepysh (2700 g/bush), Udacha × Bellarosa (1950 g/bush), Arctica × Krepysh (1670 g/bush), were identified in terms of yield and economically valuable characteristics. The frequency of selection of productive clones here exceeded 50%. These hybrid combinations are recommended for breeding research in the conditions of the Magadan region.

Первые педологи Чувашской Республики и их опыт исследования чувашских детей

The article is devoted to the study of the activities of pedologists of the Chuvash ASSR and aims to analyze the historically first study devoted to the intelligence of Chuvash children. The study is based on the publications of the first pedologists from Chuvashia F. P. Petrov and M. E. Efimov. In accordance with the historical and psychological methods described by V. A. Koltsova, the work uses problematic and source study methods. The study is written in the aspect of the history of pedagogy. A graduate student of the Kazan Oriental Pedagogical Institute, F. P. Petrov with a team of students, for the first time carried out a comprehensive study of the intellectual development of Chuvash children using the Binet-Simon test method, widely known among Soviet pedologists. At first, pedologists took the test method in Russian, then it was translated into the Chuvash language with appropriate text changes in relation to the everyday and speech characteristics of the Chuvash. The result of the study was the book published in Cheboksary, &amp;quot;The experience of studying the intellectual development of Chuvash children using the Binet-Simon method&amp;quot;, published in 1928. The book caused serious objections from the head of the pedological office at the Chuvash Scientific Research Institute M. E. Efimov; he believed that the author was biased against Chuvash children and violated the methodological principle of making tests. The correspondence polemic between two Chuvash pedologists about the measurement of children’s intelligence, along with similar cases in the country’s republics, prompted L. S. Vygotsky to call for an understanding of the problems of national pedology, with its leading problem – the measurement of intelligence.

К истории открытия и изучения феномена Окло

The paper dwells on the brief history of the discovery and studies of the Oklo uranium deposit, a natural nuclear reactor, is considered. It was shown by French specialists in 1972. The discovery was made by studying the isotope ratio 235U§238U in ore. Several years earlier, such research was carried out at the All-Union Scientific Research Institute of Mineral Raw Materials (VIMS). Unfortunately, the application for the discovery of domestic scientists was rejected.

Drought-stress tolerance potential in plum and prune rootstocks and cultivars (Prunus spp.) based on physiological and photosynthetical parameters

Drought stress and water crisis is a great limiting factor for the production of horticultural crops. The present study was carried out during 2021 and 2022 at Horticultural Science Research Institute, Kamalshahr, Karaj, Iran to identify the effect of drought stress in physiological and photosynthetic characteristics of Prunus spp. rootstocks and varieties of 4-year old Prunus spp. The factorial experiment was conducted in a completely randomized block design (CRBD) having 3 factors and 3 replications. Factors included 8 rootstocks, viz. Myrobalan 29C, Penta, Tetra, St. Julien, Mariana 2624, GF 677, GN 15 and Seedling as the first factor; 4 cultivars, viz. Greengage, Simka, NO 16 and Zochelo as the second factor; and drought stress conditions in two levels namely with interruption of irrigation for 14 days and without interruption of irrigation as the third factor. Drought stress decreased relative water content of leaves, stomatal conductance, transpiration, CO2 content in substomatal chamber, and water use efficiency. Zuchelo and Greengage varieties and GN 15 rootstock had the highest and Simka variety and Mariana 2624 and Myrobalan 29C rootstocks had the lowest stomatal exchanges and photosynthesis, respectively. Among the rootstocks; GN 15, GF 677 and Mariana 2624 showed better physiological stability under stress, and the most tolerant variety against drought stress was NO 16. Totally, grafting combination of cv. NO 16 and rootstock GN 15 has been identified as the most tolerant to drought stress.