Ural State Forestry Engineering University
Electronic archive of the Ural State Forest Engineering UniversityNot a member yet
12902 research outputs found
Sort by
Silvicultural–Dendrochronological Evaluation of Thinning Efficiency of Scots Pine Forests in Arid Conditions, Kazakhstan
No full textThe data of silvicultural and dendrochronological evaluation of thinning efficiency in Scots pine (Pinus sylvestris L.) forests of arid conditions in Kazakhstan are given in the example of the Kazakh Upland for a 70-year period. Scots pine is one of the main forest species in Kazakhstan. Increasing the sustainability of forest plantations and the possibility of forming recreationally attractive landscapes through thinning is an urgent issue for plantations growing in arid conditions. The aim of this work is to evaluate the effectiveness of different intensities of thinning over a 70-year period by silvicultural and dendrochronological methods in dry Scots pine stands of the Kazakh Upland. As a result, a general regular increase in the annual ring width, according to the control in each subsequent 10-year period after moderate and heavy thinning, was noted. It was proved that the greatest positive effect of increasing the main taxation indicators, including radial growth, is via heavy thinning. Statistically significant difference was found in the indicators under consideration between control and stands that were thinned. In Scots pine stands with a high density of forest growing in dry conditions, so it is recommended to carry out one or two procedures of heavy thinning (26–35% of stock) based on the low selection. The first thinning is recommended to carry out at the age of 25–30 years, the second 40–50 years, with the canopy cover of the stands decreasing to 0.7–0.8. In the subsequent period after thinning, it is recommended “if necessary” to carry out sanitary felling in combination with weed control. © 2025 Istanbul University-Cerrahpasa. All rights reserved
“At Home among Strangers”: Barbarian Attributes on Images of Early Byzantine Generals
No full textThe research focuses on images of two early Byzantine generals: Aspar on a silver missorium of 434 and Areobindus on ivory diptychs of 506. The goal of the study is to establish the presence of any attributes on the mentioned portraits that may indicate the origin of these generals’ ancestors from the barbaricum. The author analyzed other known iconographic and written sources of the late antique period and concluded that the hairstyles of Aspar and Areobindus could have been widespread in the areas of the Chernyakhov culture and were of Sarmatian-Alan origin. © Stratum plus
Investigating Performance Properties of Three New Types of UF Membranes for Carwash Sector Applications
No full textCarwash facilities generate considerable amounts of wastewater, which presents both an environmental challenge and a potential alternative water source. To facilitate reuse, this wastewater must meet stringent quality standards. In this study, three novel ultrafiltration (UF) membranes were developed for the first time to treat carwash wastewater (CWW). These membranes were fabricated from postmodified (PM) polyvinyl chloride (PVC) derivatives: PVC modified with 4-tert-octylthiophenol (PP1), 4-tert-butylthiophenol (PP2), and thiophenol (PP3) using a mechanosynthesis approach. The membranes were synthesized by incorporating the respective modified polymers into a solvent mixture of tetrahydrofuran (THF) and N-methyl-2-pyrrolidone (NMP) via the casting solution technique. Structural characterization was performed using Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The membranes exhibited thicknesses of 143 μm (PP1), 178 μm (PP2), and 139 μm (PP3), porosity ranging from 64.67% to 73.33%, and average pore sizes between 23.41 and 28.81 nm. Performance testing revealed that PP1 demonstrated the highest rejection rates for suspended solids (99%), oil products (82.4%), and surfactants (79%), with a flux of 40.24 L/m2 h. Although PP3 achieved the highest water flux (61.82 L/m2 h), its rejection performance was slightly lower. Retentate underwent biological treatment, removing 85%–90% of organic matter, supporting sustainable wastewater reuse. © 2025 The Author(s). Journal of Applied Polymer Science published by Wiley Periodicals LLC.Ministry of Science and Higher Education of the Russian Federation, (124020100137‐7); Ministry of Science and Higher Education of the Russian FederationThis work was supported by Ministry of Science and Higher Education of the Russian Federation (124020100137-7). Funding
Physiological features of growth and development of spruce undergrowth in the Sokolskiy forest of the national park “Russian North”
Full text linkЗа последние годы по мере обострения экологических проблем, которые тесно связаны с эксплуатацией лесных ресурсов местным населением и туристами, происходит деградация и разрушение уникальных природных экосистем. В связи с этим возникает необходимость своевременного выявления негативных изменений в физиологическом состоянии экосистем и дальнейшей их защите и охране. Цель исследования – изучение водного режима естественного возобновления ели, как показателя, характеризующего физиологическое состояние растительного организма. Объектами исследования стали пять участков сосновых древостоев, близких по возрасту и таксационной характеристике, относящихся к зеленомошной группе типов леса, и участок елового насаждения, находящийся на территории Сокольского бора в национальном парке «Русский Север». При закладке пробных площадей и их оценке руководствовались методиками, общепринятыми в таксации и лесоводстве. По качественной характеристике состояния насаждений на пробных площадях и категории санитарного состояния насаждения характеризуются как ослабленные. Отмечено, что подрост хвойных пород на всех опытных участках по жизненному состоянию является сомнительным, по густоте – редким. Установлено, что у подроста ели водный дефицит на среднем на уровне 15 %, что не является критичным для роста и развития растений. Анализируя зависимость интенсивности транспирации и освещенности под пологом леса на объектах исследования, можно отметить, что между ними имеется сильная положительная связь.In recent years, as environmental problems have become more severe, which are closely related to the exploitation of forest resources by local population and tourists, there has been a degradation and destruction of unique natural ecosystems. In this regard, there is a need to identify negative changes in the physiological state of ecosystems in a timely manner and to protect and preserve them. The purpose of this research is to examine the water regime of natural spruce regeneration as an indicator of the physiological state of the plant organism. The research objects were fi ve plots of pine forests that are similar in age and taxation characteristics, belonging to the green moss group of forest types, and the plot of spruce forests located in the Sokolsky Forest National Park «Russian North». When laying out the sample plots and evaluating them, we were guided by methods generally accepted in taxation and forestry. Based on the assessment of the quality characteristics of the plantations in the sample plots and the category of sanitary condition, the plantations were classifi ed as weakened. It was noted that the undergrowth of coniferous species in all the experimental plots was in a questionable state of vitality and sparse in terms of density. It was also established that the undergrowth of spruce had an average water defi cit of 15 %, which is not critical for the growth and development of the plants. Analyzing the dependence between transpiration intensity and illumination under the forest canopy, it can be observed that there is a strong positive correlation between them
Carbon-depositing function of pine young forests on postagrogenic lands of the Republic of Tatarstan
Full text linkПроведено исследование углероддепонирующей функции сосновых молодняков искусственного и естественного происхождения, сформировавшихся на постагрогенных землях в четырех административных районах Республики Татарстан. С использованием широко известных апробированных методик установлены достоверные различия в накоплении углерода деревьями различных категорий крупности как в одном древостое, так и в древостоях, произрастающих в разных административных районах Республики Татарстан. Установлено, что наиболее крупные деревья депонируют углерода значительно больше, чем деревья тонких ступеней толщины, несмотря на большую представленность последних в общей густоте. Сосновые молодняки, формирующиеся на постагрогенных землях, существенно различаются объемом депонируемого углерода по административным районам Республики Татарстан. При этом с продвижением от лесостепи к зоне хвойно-широколиственных лесов наблюдается статистически достоверное увеличение углероддепонирующих функций в изучаемых сосновых молодняках на постагрогенных землях. Значительные запасы древесины и массы задепонированного в ней углерода в молодняках сосны обыкновенной (Pinus sylvestris L.), формирующихся на постагрогенных землях, позволяют считать, что зарастание исключенных из оборота бывших сельскохозяйственных угодий древесной растительностью оказывает существенное влияние на содержание парниковых газов в атмосферном воздухе, а, следовательно, и на глобальные процессы изменения климата на нашей планете.The carbon-depositing function of pine young forests of artifi cial and natural origin formed on postagrogenic lands in four administrative districts of the Republic of Tatarstan has been researched. Using well-known and tested methods, reliable differences in carbon accumulation by trees of different size categories were established both in one forest stand and in forest stands growing in different administrative districts of the Republic of Tatarstan. It was found that the largest trees deposit signifi cantly more carbon than trees of thin thickness grades, despite the greater representation of the latter in the overall density. Pine young stands formed on postagrogenic lands differ signifi cantly in the volume of deposited carbon by administrative districts of the Republic of Tatarstan. At the same time, with the advancement from the forest-steppe to the zone of coniferous-broad-leaved forests, a statistically signifi cant increase in carbon-depositing functions is observed in the researched pine young forest stands on postagrogenic lands. Signifi cant reserves of wood and the mass of carbon deposited in it in young forest stands of Scots pine (Pinus sylvestris L.), formed on postagrogenic lands, allow us to assume that the overgrowing of former agricultural lands excluded from circulation with woody vegetation has a signifi cant impact on the content of greenhouse gases in the atmospheric air, and, consequently, on the global processes of climate change on our planet
Species diversity and condition of linear plantings in Ekaterinburg squares
Full text linkПроведен анализ линейных насаждений четырех скверов центральной части города Екатеринбурга. Объектами исследования выступили аллеи, живые изгороди и рядовые посадки новых скверов ЮНЕСКО, им. К. Т. Бабыкина и старых - на площади Труда и у дома Севастьянова. Проанализирован видовой состав и санитарное состояние в зависимости от возраста посадок. Сделаны выводы о возможности использования видов, представленных в выбранных скверах, в озеленении города.The analysis of linear plantings of four squares in the central part of the city of Ekaterinburg is carried out. The objects of the study were alleys, hedges and ordinary plantings of the new UNESCO squares named after K. T. Babykin and the old ones - on Labor Square and at Sevastyanov's house. The species composition and sanitary condition are analyzed depending on the age of the plantings. Conclusions are drawn about the possibility of using the species represented in the selected squares in the landscaping of the city
Vegetative propagation by green cuttings of blackcurrant in the Ural
Full text linkПроанализирована эффективность вегетативного размножения 10 сортов смородины черной зелеными черенками. В качестве стимулятора использован раствор индолил-3-масляной кислоты. Изучен прирост побегов. Доля укоренившихся черенков при выдерживании их в воде отмечена в диапазоне от 53,0 до 100,0 %, при выдерживании в стимуляторе - от 35,0 до 100,0 %.The effectiveness of vegetative reproduction of 9 varieties of black currant with green cuttings is analyzed. A solution of indolyl-3-butyric acid was used as a stimulant. The growth of shoots has been studied. The range of rooted cuttings in water is from 53.0 to 100.0 %, the range of rooted cuttings in a stimulant is from 35.0 to 100.0 %
Soil analysis of school number 53 in the city of Ekaterinburg
Full text linkВ статье приведен и описан анализ образцов почвенных разрезов на территории школы МАОУ СОШ № 53. Показано, что свойства зональных почв при урбанизации школьного участка преобразованы, в значительной мере зависят от состава строительного мусора и требуют внесения органических и минеральных удобрений.The article presents and describes the analysis of samples of soil sections on the territory of the School Number 53. It is shown that the properties of zonal soils during the urbanization of the school site have been transformed, largely depend on the composition of construction debris and require the application of organic and mineral fertilizers
Logistics of land-water routes of timber movement on the example of LLC “RAID” PRIKAMYE
Full text linkПредставлена методика логистики сухопутно-водных путей доставки древесины с лесосек на пункты перевалки для водного транспорта и их размещения в координатах береговой линии. Изложены требования к методике: эффективность, достоверность, простота. Дан пример реализации разработанной методики на основе группировки лесосек по определенным факторам и картографии маршрутов от кластеров лесосек к пунктам перевалки.The methodology of logistics of overland waterways for the delivery of timber from logging sites to transshipment points for water transport and their placement in the coordinates of the coastline is presented. The requirements for the methodology are outlined: efficiency, reliability, simplicity. An example of the implementation of the developed methodology based on the grouping of logging sites by certain factors and the mapping of routes from clusters of logging sites to transshipment points is given
Road safety at night
Full text linkВ статье рассмотрена безопасность дорожного движения на участке автомобильной дороги г. Екатеринбург - с. Курганово в темное время суток. Определено количество автомобилей, движущихся в транспортном потоке со слепящими фарами. Рассмотрено влияние ослепления водителей транспортных средств на время реакции водителей при определении опасности для движения. Приведены результаты опроса водителей автомобилей о влиянии ослепления на безопасность дорожного движения.The article considers traffic safety on the section of the Yekaterinburg – Kurganovo highway at night. The number of cars moving in traffic with blinding headlights has been determined. The effect of blinding drivers of vehicles on the reaction time of drivers in determining the danger to traffic is considered. The results of a survey of car drivers on the impact of blinding on road safety are presented
Data sources:
Access Repository Dashboard
Do you manage Electronic archive of the Ural State Forest Engineering University? Access insider analytics, issue reports and manage access to outputs from your repository in the CORE Repository Dashboard!