Influence of the bentonite-containing acrylic humectant composite on the soil microflora

ArticleAcrylic derivative-based superabsorbents are widely used currently in agriculture as the soil conditioners, plant growth regulators, etc. Their usage has a positive effect on the growth and survival of the plants cultivated in the arid regions. However, the effects of hydrophilic acrylic polymers on the soil microbiocenosis still remain unknown. The influence of the moistureabsorbing acrylic acid-based hydrogels with different proportions of bentonite filler was studied on the soil microbiota. N,N-methylenebisacrylamide was used as a crosslinking agent. Acrylic hydrogels were synthesized by radical polymerization in an aqueous medium at a synthesis temperature of 45 °C during 4 hours. The application of hydrogel of the certain concentrations (1.0, 1.5, and 2.5% wt) into the soil did not cause significant changes in the total abundance of heterotrophic bacteria and the length of the fungal mycelium. The CO2 emission rates did not change after and during the application of the hydrogel), which indicated the same level of carbon mineralization in the soil with presence of acrylic bentonite-containing hydrogels. The nitrogen fixation rate decreased on the first day after hydrogel application; after 14 days, it was close to the control values. We assume the activity of nitrogen-fixing bacteria has though turned to the normal level

Sorption Properties of Clay and Pectin-Containing Hydrogels

As is known, polymeric polyelectrolyte hydrogels are superabsorbents that are capable of absorbing moisture in amounts many times greater than their own mass. Numerous studies have shown that besides water absorption and retention, they can also be effectively used as sorbents to purify water from heavy metals. In many works, attempts are made to improve the sorption properties of polyelectrolyte hydrogels by creating polymer composites based on them. Organic/inorganic composite materials frequently exhibited desired hybrid performance superior to their individual components and cost-efficient characteristics. The composites derived from natural polysaccharides and inorganic clay minerals are of special interest by virtue of their unique commercial and environmental advantages, which means that the design and development of environmentally friendly superabsorbents, introducing natural ingredients, have long been necessary. In this paper, we consider polymer hydrogels based on a copolymer of acrylic acid and acrylamide filled with pectin and bentonite. The aim of this study is to investigate the influence of chemical conditions on hydrogels and their composites, kinetic, and absorption behavior toward metal ions in the presence of the chelating agent. In this chapter, an investigation of the kinetic patterns of swelling, deswelling, and sorption of the hydrogels and their composites will be presented

Dielectric characterization of the BiFe0.5Cr0.5O3 ceramics

Dielectric properties of the BiFe0.5Cr0.5O3 ceramics synthesized under high pressure were investigated in a broad frequency range (20 Hz – 1 GHz) between 200 and 500 K. It was revealed that the ceramics exhibit electrical conductivity above 300 K. Below 300 K, a dielectric dispersion caused by ferroelectric domains was observed. It was found that the conductivity follows the Almond–West law, which allowed us to determine a DC contribution (σDC). From the σDC values obtained at different temperatures, the activation energy (EA = 0.302 ± 0.006 eV) was calculated using the Arrhenius law.publishe

Ergonyms of latin origin

The article considers ergonyms of Latin origin, which are used as the names of existing organizations, companies and projects of Russian cities. Latin, unlike Russian and English, is not familiar to everyone. Because of this, companies with an “unusual” and “unfamiliar” name are of great interest. We have found more than 1500 names. Among which are the names of law firms, beauty salons, industrial enterprises, trade organizations. The analysis revealed that most of the names are used for medical centers, clinics and laboratories. Some names are repeated a lot in different regions.В статье рассмотрены эргонимы латинского происхождения, которые используются в качестве названий действующих организаций, компаний и проектов городов России. Латинский язык в отличие от русского и английского знаком далеко не каждому. Из-за этого компании имеющие «необычное» и «незнакомое» название, вызывают большой интерес. Нами было найдено более 1500 названий. Среди которых названия юридических фирм, салонов красоты, промышленных предприятий, торговых организаций. В результате анализа было выявлено, что большинство названий используется для медицинских центров, клиник и лабораторий. Некоторые названия много повторяются в различных регионах

Formation of names of medicines on the basis of anatomical formations

The article describes drugs containing anatomical information. As a result of the analysis, term elements of Greek and Latin origin were identified in their composition. Most of these word-formation segments form the main therapeutic groups of drugs. Greek and Latin term elements are presented in a large number of drugs and are implemented in various combinations.В статье описываются лекарственные средства, содержащие информацию анатомического характера. В результате анализа в их составе были выявлены терминоэлементы греческого и латинского происхождения. Большинство указанных словообразовательных отрезков формируют основные терапевтические группы лекарственных средств. Греко-латинские терминоэлементы представлены в большом количестве лекарственных средств и реализуются в различных комбинациях

"Course of clinic of internal diseases and clinical lectures" by S.P. Botkin

The article describes Latin inclusions of medical content used by S.P. Botkin in his scientific work "Course of clinic of internal diseases and clinical lectures." Latin inclusions are individual words and phrases included in the Russian text without changes. As a result of the study, we identified the reasons that prompted the use of Latin terms and phrases. The author uses them as a translation; for a detailed description of the phenomena that he compares with each other; for explanations; in order to avoid repetition of the Russian term in the sentence. In addition, the article analyzes numerous Latinisms.В статье описываются латинские вкрапления медицинского содержания, используемые С.П. Боткиным в научном труде «Курс клиники внутренних болезней и клинические лекции». Латинские вкрапления представляют собой отдельные слова и словосочетания, включенные в русский текст без изменений. В результате исследования нами были выявлены причины, побудившие использовать именно латинские термины и фразы. Автор использует их в качестве перевода; для детального описания явлений, которые сравнивает между собой; для пояснений; во избежание повторения русского термина в предложении. Кроме того, в статье анализируются многочисленные латинизмы

Ethymological origin of neurological terminology

The article considers the semantic origin of some Latin terms used in neurology. The etymology of Latin terms is investigated. As a result of the study of the terminological dictionary, 136 words were identified that describe the symptoms and names of neurological diseases. Most of the words were terms of Greek-Latin origin, only a few words fell into the terminology of modern languages - English and French. In addition, eponyms are found in the dictionary.В статье рассмотрено семантическое происхождение некоторых латинских терминов, используемых в неврологии. Исследована этимология латинских терминов. В результате исследования терминологического словаря было выявлено 136 слов, описывающих симптомы и названия неврологических болезней. Большую часть слов составили термины греко-латинского происхождения, лишь несколько слов попали в терминологию из современных языков – английского и французского. Кроме того, в составе словаря встречаются эпонимы

Greek neoclasisism in anatomical terminology

The article describes Greek neoclassicisms – neologisms composed of Greek morphemes that are used in modern anatomical terminology. Recently, their number has been increasing markedly. This also applies to nouns and to adjectives derived from them. Greek roots, prefixes, suffixes, and even inflections are used as Greek morphemes. Less commonly, the Latin root, overgrown with Greek morphemes, is used as the main unit. Artificially created terms based on Greek word-formation elements become more preferable as more terminologically significant, accurate and unambiguous.В статье описываются греческие неоклассицизмы – неологизмы, составленные из греческих морфем, которые используются в современной анатомической терминологии. В последнее время количество их заметно возрастает. Это относится и к существительным, и к производным от них прилагательным. В качестве греческих морфем используются греческие корни, префиксы, суффиксы и даже флексии. Реже в качестве основной единицы используется латинский корень, обрастающий греческими морфемами. Искусственно-созданные термины на базе греческих словообразовательных элементов становятся более предпочтительными как более терминологически значимые, точные и однозначные

The terms "clinic" and "clinical" in the mirror of professional and everyday language consciousness

The aim of the study - to find and analyze the meanings of the words "clinic" and "clinical".Целью исследования - нахождение и анализ значений слов «клиника» и «клинический»

Magnetic Diagram of the High-Pressure Stabilized Multiferroic Perovskites of the BiFe1-yScyO3 Series

Magnetic properties of the high-pressure stabilized perovskite BiFe1-yScyO3 phases (0.1 ≤ y ≤ 0.9) have been studied by means of magnetization measurements and neutron diffraction. The metastable perovskites of this series undergo irreversible polymorphic transformations upon annealing, the phenomenon referred to as conversion polymorphism. It has been found that the solid solutions with y ≥ 0.70 exhibit no long-range magnetic ordering regardless of their polymorph modification, while those with y ≤ 0.60 are all antiferromagnets. Depending on the scandium content, temperature and structural distortions, three types of the antiferromagnetic orderings, involving collinear, canted and cycloidal spin arrangements, have been revealed in the phases obtained via conversion polymorphism and the corresponding magnetic phase diagram has been suggested