Представлены результаты фитохимического анализа cтевии и клубней стахиса. Выявлено, что в клубнях содержатся в наибольшем количестве аминокислоты, углеводы, гликозидированные тритерпеноиды, в маломалкалоиды, флавоноиды, в следахорганические кислоты, отсутствуютдубильные вещества, кумарины и антрахиноны. Показана акропетальный характер распределения сладких гликозидов в отдельных органах стевии. Сделан вывод о том, что молодые листья стевии и свежесобранные клубни cтахиса являются перспективным растительным сырьем для включения в состав новых БАД и продуктов питания антидиабетического и общеукрепляющего действия в качестве источника легкоусвояемых углеводов, свободных аминокислот, витаминов и других биологически активных соединении.
В работе представлены эффективные технологические мероприятия по получению крупного и мелкого заполнителя из бетонного лома. Приводится фракционный состав заполнителя из некондиционных бетонных и железобетонных изделий, классификация его в зависимости от гранулометрии и рекомендации использования вторичного заполнителя в производстве строительных материалов. The paper presents effective technological measures for obtaining large and small aggregate from concrete scrap. The fractional composition of the aggregate from substandard concrete and reinforced concrete products, its classification depending on granulometry and recommendations for the use of secondary aggregate in the production of building materials is given.
The article presents the outcomes of analysis and synthesis of Russian and Kazakh researches on the issue of the use of industrial waste industry for the production of composite slag base binders and concretes. Utilization, liquidation of industrial wastes and their use in the production of composite alkali-activated slag are the issues of global and national importance. Therefore, industrial and developed countries pay great attention to this issue. The influence of the production wastes of the enrichment of polymetallic ores – carbonate-barium tailings on the performance properties (strength, water absorption, density, etc.) of composite alkali-activated slag and concretes is studied. The ways of introducing modifying additives “waste of carbonate-barium tailings” into the composition of alkali-activated slag and concretes are investigated. The optimal amount of introduction the waste of carbonate-barium tailings into the composition of alkali-activated slag of modifying additives is determined. It is 10% of the binder mass and an indicator of effectiveness in influencing the activity of concrete, depending on the type of alkaline component and the hardening conditions. The methods of testing the experimental work to determine the operational properties of alkali-activated slag and concretes based on them are presented.
News of the Academy of sciences of the Republic of Kazakhstan 2 NAS RK is pleased to announce that News of NAS RK. Series of chemistry and technologies scientific journal has been accepted for indexing in the Emerging Sources Citation Index, a new edition of Web of Science. Content in this index is under consideration by Clarivate Analytics to be accepted in the Science Citation Index Expanded, the Social Sciences Citation Index, and the Arts & Humanities Citation Index. The quality and depth of content Web of Science offers to researchers, authors, publishers, and institutions sets it apart from other research databases. The inclusion of News of NAS RK. Series of chemistry and technologies in the Emerging Sources Citation Index demonstrates our dedication to providing the most relevant and influential content of chemical sciences to our community.
Проведены исследования физико-химических процессов структурообразования композиционных цементов с добавкой отходов обогащения полиметаллических руд современными методами. Были определены минералогический состав, химический состав с использованием рентгенофазового, микроскопического, дифференциально-термического методов анализа. Это позволило установить, что содержание карбонатов в отходах обогащения полиметаллических руд до 30% не понизило прочности образцов. Investigations of the physicochemical processes of structure formation of composite cements with the addition of wastes of concentration of polymetallic ores by modern methods have been carried out. The mineralogical composition, chemical composition were determined using X-ray phase, microscopic, differential thermal methods of analysis. This made it possible to establish that the carbonate content in the wastes of enrichment of polymetallic ores up to 30% did not reduce the strength of the samples.
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