bluuebunny/crossref_metadata_2025 huggingface dataset:
The Representation of Academic Ethos Values in Student’s Information Processing Activities
Authors: Еременко Т.В.
Published: October 2020

В статье представлены результаты исследования, цель которого заключалась в анализе репрезентации академических ценностей в информационной деятельности студентов
и описания основных типов их информационно-этического поведения.
Охарактеризовано применение метода типологизации для упорядочения и систематизации информационно-этического поведения студентов с опорой на два критерия: процессы информационной деятельности и ценности академического этоса. По первому критерию выделено четыре основных процесса информационной деятельности, в которые вовлекается каждый студент вуза в ходе получения образования: поиск, отбор, переработка и передача информации. По второму критерию на основе теоретического изучения литературы по проблематике исследования и анализа зон этической напряженности в работе студентов
с информацией выделены три ценности академического этоса: честность, уважение и ответственность. Изложен процесс операционализации теоретических понятий «процессы информационной деятельности» и «ценности академического этоса» и их перевода в систему индикаторов. С применением данных индикаторов составлена описательная характеристика трех основных типов информационно-этического поведения студентов, а именно поведения, осуждаемого с точки зрения академической этики; поведения, одобряемого с точки зрения академической этики; поведения, примерного с точки зрения академической этики.

The article presents the results of a research whose aim is to analyze the representation of academic values in students’ information-processing activities and to describe major types of students’ behavior associated with information ethics. It explains how the typology-based method can be used to systematize students’ behavior related to information ethics on the basis of two criteria: information processing processes and academic ethical values. The first criterion is used to single out four major processes of information activity that ensure every student’s involvement: information search, information processing information transfer. The second criterion is used to theoretically investigate literature focusing on research issues and on analysis of ethics-related tension in students’ information processing. The article singles out three academic ethical values: honesty, respect, responsibility. The article discusses the process of operationalization of such theoretical issues as information activities and academic ethical values, the transformation of ethics into indicators. These indicators are used to describe the major types of students’ behavior related to information ethics, namely students’ behavior that is censured from the point of view of academic ethics and behavior that requires praise according to academic ethics.
Investigating Individual Strategies of Health-preservation
Authors: Яковлева Н.В.
Published: October 2020

Одним из направлений психологии здоровья как преимущественно прикладной отрасли современной психологической науки является исследование поведения личности, связанного с сохранением и укреплением здоровья.
В статье обосновывается необходимость использования в методологии исследований здоровьесберегающего поведения категорий деятельности и субъекта, а также системного и метасистемного подходов.
Описаны назначение и структура опросника «Исследование здоровьесберегающей деятельности» (ИЗД), разработанного автором для диагностики структуры и уровня сформированности здоровьесберегающей деятельности субъекта. Приведены результаты
исследований, проведенных с использованием указанного опросника в группах лиц разного возраста и состояния здоровья (подростки, спортсмены, больные хроническими заболеваниями). Показана валидность методики и ее эффективность при проведении прикладных эмпирических исследований.

One of the major trends of health psychology as a predominantly applied branch of modern psychology is the investigation of individual behavior associated with health preservation and health improvement.
The article maintains that the investigation of health preserving behavior strategies should be performed with reliance on such categories as individuals and their activities, should employ both systemic and metasystemic approaches.
The article discusses the aim and the structure of a questionnaire (Investigating Health Preservation Strategies) created by the author of the article to diagnose the structure and the efficiency of people’s health preservation strategies. The article provides the results of a survey in which the above-mentioned questionnaire was used to assess the structure and the efficiency of health preservation strategies used by people of different age groups and with different health conditions (teenagers, sportsmen, chronically ill people). The article maintains that the above mentioned method is valid and highly efficient and can be used to conduct empirical research.
COMMEMORATING GRIGORY NAUMOVICH PRISTUPA’S 100th BIRTH ANNIVERSARY
Authors: Демидова Н.И. , Богданова Е.С.
Published: October 2020

В статье анализируется вклад профессора Г. Н. Приступы в теорию и практику обучения русскому языку. Будучи учениками Г. Н. Приступы, авторы акцентируют внимание не только на методической научной и просветительской деятельности ученого, но и на глубине его личности.

The article analyzes Professor G. N. Pristupa’s contribution to the theory and practice of Russian language teaching. Being G. N. Pristupa’s students, the authors of the article speak not only about Pristupa’s methodological, scholarly and educational legacy, but also about the outstanding scholar’s personal qualities.
EVALUATION OF THE IMPLEMENTATION OF THE CIRCULAR ECONOMY IN EU COUNTRIES IN THE CONTEXT OF SUSTAINABLE DEVELOPMENT
Authors: Kryshtanovych Myroslav , Filippova Viktoriia , Huba Maryna , Kartashova Olga , Molnar Oleksandr
Published: October 2020

The circular economy is interpreted as a stable economic system, which aims at eliminating the consequences and costs, as well as providing a constant cycle of necessary resources. That is why it is so important to conduct its assessment today. The object of the article is the state of the circulating economy of the leading countries of the world. The purpose of the article is to assess the possibilities and mechanisms of the circular economy in the context of the introduction of the European Union. The methodological basis is a system of mutually complementary general scientific and special methods of cognition. To assess the quality of the implementation of the circular economy, we have chosen the recycling method as the most relevant and easiest to use. The study examined the essence, progress, principles and main advantages of using the circular economy model in the context of implementing this model in 20 countries of the European Union, and the model for analysing the processing possibilities in the European Union as a basic tool for assessing the implementation of a circular economy are presented.
Adaina jobimi sp. nov., a plume moth (Lepidoptera, Pterophoridae) associated with Baccharis alnifolia (Asteraceae) in the Andes of northern Chile
Authors: Vargas Héctor A.
Published: October 2020

The adult stage of the plume mothAdaina jobimisp. nov.(Lepidoptera: Pterophoridae: Pterophorinae: Oidaematophorini) from the arid highlands of the western slopes of the Andes of northern Chile is described and illustrated. The wing pattern and genitalia ofA. jobimiresemble those ofA. excretaMeyrick, 1930, from Argentina, Ecuador and Peru andA. coquimboaeGielis, 2012, the only representative of the genus previously known from Chile. Morphological differences ofA. jobimiwith these two congenerics are discussed. Larval feeding and pupation ofA. jobimioccur on inflorescences of the native shrubBaccharis alnifoliaMeyen & Walp. (Asteraceae). The discovery ofA. jobimiprovides the first record of the genus in a long distribution gap in mainland South America west of the Andes Range, suggesting that the taxonomic diversity ofAdainain this area deserves further attention.
Tipificación efectiva del nombre Linneano Thymus pulegioides (Lamiaceae)
Authors: Ferrer-Gallego P.
Published: October 2020

Se revisa la tipificación del nombre de Linneo Thymus pulegioides (Lamiaceae). Este nombre fue previamente “lectotipificado” por Mártonfi en 1997 a partir de un espécimen conservado en el herbario LINN (Herb. Linnaeus No. 38.6). Sin embargo, Linneo citó un espécimen de Sauvages en el protólogo, en la actualidad conservado en LINN (Herb. Linnaeus No. 38.5). Por lo tanto, en la designación del lectotipo debe elegirse este espécimen de acuerdo con el Código Internacional de Nomenclatura para algas, hongos y plantas (Art. 9.12 del Código de Shenzhen de 2018).
Development of walnut oil and almond oil blends for improvements in nutritional and oxidative stability
Authors: Pan F. , Wang X. , Wen B. , Wang C. , Xu Y. , Dang W. , Zhang M.
Published: October 2020

For the increase in oxidative stability and phytonutrient contents of walnut oil (WO), 5, 10, 20 and 30% blends with almond oil (AO) were prepared. The fatty acid compositions and the micronutrients of the oil samples such as tocopherol, phytosterol and squalene were measured by GC-MS and HPLC. It was found that the proportions of PUFAs/SFAs in blended oils with high AO contents were lowered, and the blends contained higher levels of tocopherols, phytosterols and squalene than those of pure WO. The 60 °C oven accelerated oxidation test was used to determine the oxidative stability of the blended oil. The fatty acid composition, micronutrients and oxidation products were determined. The results showed that the oxidation stability of the blended oil increased with an increasing proportion of AO. In addition, a significant negative correlation between micronutrient and oxidation products was observed as the number of days of oxidation increased.
Atma Insights: A Flexible Learning Tool to Enable Global Learners to Access Essential Business and Cross-Cultural Knowledge
Authors: Dunung Sanjyot P
Published: October 2020

This case provides a deeper understanding of how cross-cultural learning tools can be effectively utilized to enable professionals and companies optimize professional and personal development, improve communication, foster awareness, build trust, and align with global corporate objectives and benchmarks.
Voies et voix de la résistance pendant la dictature en Espagne : Antigone, du mythe à l’incarnation de la dissidence antifranquiste
Authors: Blin Fanny
Published: October 2020

Immortalisée par la littérature engagée du xxe siècle en tant que symbole par excellence de l’opposition à la tyrannie, Antigone ressurgit particulièrement dans la dramaturgie espagnole pendant et après la dictature franquiste. Cette figure mythique a en effet inspiré près de vingt réécritures de l’œuvre sophocléenne entre 1939 et 1989, en castillan, mais aussi en catalan et en galicien. En effet, Antigone a hanté la pensée des opposants au Régime car sa tragédie familiale est miroir éloquent de la post-guerre civile. Dans un contexte où le pouvoir verrouille les discours historiographiques et contestataires, réécrire cette pièce offre un sillon à la pensée du drame national tout en valorisant l’objection de conscience. C’est le chemin qu’empruntent Bayo, Bergamín, Zambrano, Elizondo, De la Rica puis Riaza, dont les œuvres participent de la réinterprétation critique de la notion de désobéissance politique. Le rapport de force s’illustre dans l’écriture même : certains dramaturges catalans (Espriu, Muñoz i Pujol, Povill i Adserà…) et galiciens (Queizán, Lourenzo, et Rodríguez Pampín) combattent l’uniformisation culturelle menée par le Régime dictatorial, en transcrivant la tragédie dans une langue prohibée. Adapter cette pièce emblématique en langue régionale est donc en soi un acte de résistance. Mais à quoi résiste Antigone ? La figure fonctionne comme le masque des résistants : prêtant sa voix, elle ouvre la voie d’une possible contestation.
A Version and Context-Based Approach to Easily Model Flexible Collaborative Processes
Authors: Ellouze Fatma , Chaabane Mohamed Amine , Andonoff Eric , Bouaziz Rafik
Published: October 2020

Process flexibility has been investigated for intra-organizational processes, but it is still an open issue for collaborative processes (CP), each of which is defined as a set of intra-organizational processes that interact together. In the literature, the version-based approach is largely used in the field of business process management (BPM) to cope with process flexibility. However, BPM practitioners can face difficulties in a multi-version environment. So, the following questions arise: How can we use the version-based approach to easily model flexible CP? Does an appropriate version exist for a given situation or is it necessary to create a new one? The chapter answers these questions recommending a solution for the modeling of CP versions and the retrieval of the adequate CP version for a given situation. This solution comprises (1) a meta-model to consider the modeling of the CP versions, (2) an ontology-based approach to model and query the context of use of CP versions, and (3) a framework to provide support for both the modeling of CP versions and the context querying.
E-Collaboration in Educational Organizations
Authors: Papadimitriou Sofia Th. , Papadakis Spyros
Published: October 2020

The chapter explores the use of virtual learning environments (VLE) to support learning spaces in schools/universities and illustrates their advantages to enhance e-collaboration and its key dimensions. Case studies of learning management systems (LMSs) point out the use of synchronous or asynchronous communication and highlight the advantages, the requirements, and the relevant constraints. In particular, this chapter emphasizes in the development of e-collaborative experiences at schools/universities based on LMSs to support both students and educators in their complex work. VLEs will be presented aiming to e-collaboration and their numerous services to enhance differentiated pedagogy. Case studies of e-collaborating in communities of practice and exemplary LMSs are illustrated in a comparative table highlighting how they support key dimensions of e-collaboration. Finally, the chapter highlights discussion themes raised by e-collaborating in VLEs and generally in learning spaces. Proposals for further development of e-collaboration and conclusions are drawn and commented.
Study of Increasing Adoption Trends of Digital Banking and FinTech Products in Indian Payment Systems and Improvement in Customer Services
Authors: Bhasin Narinder Kumar , Rajesh Anupama
Published: October 2020

The objective of massive adaptation of digital payments by the banks with the support of the central bank of any country along with their government agencies is to improve customer services and satisfaction in the online payment systems in place of cashless and paperless payment systems. There are very few researches that have focused to measure the higher customer satisfaction based on factors like trust, risk-free, secure, transparent, accountability of banks, fintech, regulator, and payment system operators. This chapter analyzes the impact of digital banking and fintech in the Indian banking system, initiatives taken by RBI, NPCI, and the government to build the strong trust of customers in online payment systems to ensure improvement in customer services with higher customer satisfaction.
Educação, civilização, entretenimento
Authors: Melo Victor Andrade de
Published: October 2020

Este artigo tem por objetivo discutir a experiência do Tivoli – as ações dos proprietários e a repercussão de suas iniciativas, com ênfase no que tange aos posicionamentos relativos aos comportamentos públicos, interpretados a partir de uma dupla dimensão: educação para e pelo entretenimento. Trata-se de um dos pioneiros parques de diversão do Rio de Janeiro. Inaugurado em 1846, ocupou um espaço notável na cidade, uma expressão do conjunto de mudanças que marcou a sociedade fluminense em meados do século XIX. Como fontes, optou-se pelo uso de jornais. O intuito da investigação é lançar um olhar distinto para o cotidiano citadino, reconhecendo a relevância das vivências de diversão. Sugere-se que são significativas as instâncias de educação, interessantes temas de pesquisa histórica.
A Câmara Municipal de Mariana e sua faceta pedagógica (1889-1930)
Authors: Carvalho Rosana Areal de , De Paula Leandro Silva
Published: October 2020

Desenhar as ações educativas implementadas pela Câmara Municipal de Mariana nas primeiras décadas republicanas tomando o conceito de município pedagógico delineado por Justino Magalhães é o mote desse artigo, considerando a autonomia e a responsabilidade das câmaras indicadas pela Constituição Federal e de Minas Gerais, ambas de 1891. A documentação do Arquivo Histórico da Câmara Municipal informa sobre a construção e a manutenção de escolas, contratação e pagamento dos professores, a compra e distribuição de materiais didáticos destinados aos alunos pobres. Ficou evidenciada a faceta pedagógica do município de Mariana, visível no cumprimento da lei e em ações no âmbito da intermunicipalidade, por vezes limitada pelos recursos financeiros.
La escolarización de la educación física
Authors: Xavier Torrebadella-Flix
Published: October 2020

La educación masiva de la infancia y sus diferentes regímenes de escolarización institucionalizaron disciplinas académicas para una rápida formación de los ciudadanos. Una de estas disciplinas fue la educación física, la cual fue concebida como un dispositivo disciplinar de adoctrinamiento. El objeto de este trabajo es analizar desde una perspectiva de la Teoría Crítica algunas imágenes en torno a la educación física escolar publicadas en la prensa barcelonesa de principios del siglo XX. A través de las imágenes visualizamos el impulso de la educación física de la época y desvelamos la proporción de ‘dispositivos’ (técnicas de saber/poder) que configuraron en el imaginario colectivo la idea de una disciplina moderna y de progreso necesaria para la edificación social y nacional.
Educação e trabalho; raça e classe no pensamento de um intelectual negro
Authors: De Andrade Leal Maria das Graças
Published: October 2020

Na perspectiva da história social da educação, tomando as trajetórias de intelectuais e educadores negros como percurso metodológico, discuto os temas da educação e do trabalho presentes na obra do intelectual e educador afro-baiano Manuel Querino (1851-1923). Os seus livros As artes na Bahia e artistas bahianos, publicados em 1909, e outros acervos documentais são utilizados como fontes deste estudo, a partir dos quais apresento e relaciono, de forma diacrônica, as suas reflexões sobre os des-caminhos de escolarização adotados pelos poderes públicos para as classes populares, nos contextos das duas últimas décadas da monarquia escravista e do pós-abolição, que resultaram na exclusão de talentos negros e mestiços dos meios escolares e produtivos, cujos reflexos alcançam o tempo presente.
La "Gazeta de Caracas" en el albor del movimiento independentista
Authors: Garcia Farrero Jordi
Published: October 2020

El presente texto estudiael comienzo del movimiento independista venezolano, desde la creación de un gobierno propio (Junta Suprema de Caracas) hasta la proclamación de la I República, a partir de la Gazeta de Caracas (1808-1822) como canal principal del nuevo ideario político. Han sido cotejadas todas las ediciones del primer diario caraqueño, que coincide con la instalación de las primeras imprentas (Pedro Grases), para poner de manifiesto las instituciones educativas más relevantes (escuelas de primeras letras, Universidad de Caracas, Escuela Náutica de La Guaira) y, al mismo tiempo, el pensamiento pedagógico de unageneración de intelectuales entregada a la causa de la libertad a principios del siglo XIX.
‘Pela iluminação do passado’
Authors: Pasche Aline de Morais Limeira , Nascimento Fátima Aparecida do , Santos Aline Machado dos , Silva Edgleide de Oliveira Clemente da
Published: October 2020

Neste estudo pensamos formas de abordar a emancipação política do país. Interrogamos alguns “restos”, lugares de memórias: os livros, responsáveis pela intervenção, educação, constituição e legitimação de determinadas representações acerca da Independência. Tratam-se de: Ideias por coordenar a respeito da emancipação de Maria Durocher (1871) e A Independencia e o Imperio do Brazil de Alexandre Moraes Filho (1879). Concluímos a análise entendendo os objetivos distintos de cada obra e suas semelhanças, como o fato de relacionarem a incompatibilidade da independência com a escravidão. No aspecto educacional, Durocher defendia a educação formal enquanto Mello Moares uma narrativa verdadeira baseada em fatos e documentos, que se constituiria história para formação da juventude.
A educação sexual no confessionário
Authors: Carvalho Carolina da Costa de , Kodama Kaori
Published: October 2020

A proposta do artigo é analisar os discursos católicos sobre educação sexual durante a década de 1950 a partir de seções de correspondência com leitores publicados nos impressos Lar Católico e Família Cristã. Consideramos que tais seções, escritas e mantidas por Maria Madalena Ribeiro de Oliveira e Padre Videns, respectivamente, eram espaços privilegiados de mediação e evangelização dos leigos. Os anos 1950 são um período marcado por transformações institucionais significativas na Igreja Católica, em particular por maior aproximação junto aos discursos científicos e a evangelização através do apostolado laico. Dentre os preceitos da ‘boa educação sexual’ estava a recomendação da prática da leitura, que servia de guia tanto para incorporar os preceitos científicos considerados válidos quanto para reafirmar o valor da moral e preservar as diferenças sexuais.
Medical Nonwovens: Effects of Radiation Sterilization on Bursting Strength
Authors: Galimzyanova Rezeda Yu. , Lisanevich Maria S. , Rakhmatullina Elvina R. , Khakimullin Yuri N.
Published: October 2020

The production of nonwovens over the past few years remains one of the most promising areas in the textile industry. This is due to the short cycle of production of such materials from raw materials to finished products and the ability to produce at a low cost a wide range of materials for both household and technical use. In particular, non-woven materials are widely used for the manufacture of disposable medical clothing and underwear. An important characteristic for surgical clothing is an indicator of bursting strength. This study simulates material deformation similar to elbow pressure when bending the arms or knee when bending the legs. Since the lower part of the sleeve of the product refers to the critical zone of the product, i.e. to the zone most likely to be involved in the transfer of infectious pathogens to or from the wound, the sterile product must have a significant margin of bursting strength. The effect of the absorbed dose of electronic radiation on the strength during the bursting strength of nonwoven medical material of SMS design with a surface density of 35 and 50 g/m2 obtained using the spanmelt technology was studied. It is shown that electronic radiation significantly reduces the resistance of the nonwoven to bursting strength. With an absorbed dose of 40 kGy, the material no longer meets the requirements for surgical clothing and linen by regulatory documents. For non-woven materials obtained using spanmelt technology, the bursting strength rate is even more sensitive to the action of ionizing radiation than the tensile tensile load, therefore, this indicator is recommended to be used as a characteristic indicator of radiation resistance.
Obtaining Nanofibers Na-CMC in Mechanomagnetic Activated Water Solution for the Purpose of Reinforcing Concrete Structure
Authors: Akulova Marina A. , Slizneva Tatjana E. , Sokolova Yulia A. , Sokolova Alla G.
Published: October 2020

The authors have studied the impact of mechanomagnetic activation (MMA) of the solutions NA-CMC, widely used for mixing water-cement paste, on the structure and properties of cement composites. By the method of dynamic light scattering, the appearance of nanosize particles of grouting fluid’s dispersion phase has been proved. On the base of the results of X-ray diffraction analysis, there have been found alterations of cement stone structure; the influence of MMA on the processes of structure formation has been proved; the principal components of cement stone structure have been identified.
The Catalytic Synthesis of Wholly Aromatic Polyesters Based on 4-hydroxybenzoic Acid via Direct Esterification
Authors: Deberdeev T.R. , Akhmetshina Alsu I. , Karimova Liana K.
Published: October 2020

The synthesis and properties of wholly aromatic polyesters are of considerable practical importance to create functional and high-performance materials. In the present study, by means of catalytic polyesterification using titanium (IV) butoxide, we’ve synthesized wholly aromatic oligomers derived from 4-hydroxybenzoic acid (HBA), aromatic diacids and dibasic phenols. As revealed by FTIR measurements, the average molecular weight of oligomers has varied from 500 to 1400. The results of DSC have shown endotherm peaks attributed to a phase transition of low-molecular oligomers from crystalline state to mesophase and further isotropization. The synthesized oligomers were resistant to high temperatures up to about 300-320 °C.
The Effect of Thermal Degradation Processes on the Physical-Mechanical and Rheological Properties of Polyketone
Authors: Vodyakov Vladimir N. , Kotin Alexandr V. , Kuznetsov Vyacheslav V. , Kulikovskaya Kseniya A. , Radaykina Elena A. , Murneva Mariya I.
Published: October 2020

The effect of polyketone thermal processing duration on the rheological properties of the melts and the physical and mechanical characteristics of the samples, obtained by injection and compression molding methods, is studied.
Unsaturated Polyester Resins and Fiber-Reinforced Polymer Composites from Plant Biomass
Authors: Klushin Victor , Shabliy Ekaterina A. , Petrenko Dmitry
Published: October 2020

We are the first to report the synthesis of maleic acid in quantitative yield by oxidation of 5-hydroxymethyl furfural with hydrogen peroxide in the presence of sodium bicarbonate in an aqueous medium under ambient conditions without the using of toxic catalysts and solvents. 5-hydroxymethyl furfural and 2,5-furandicarboxylic acid have been prepared from hexose plant biomass. Based on maleic anhydride and 2,5-furandicarboxylic acid, unsaturated polyesters were synthesized for the first time from renewable raw materials only. A fiber-reinforced polymer composite based on these polyester resins have been prepared. Strength properties of carbon and glass fiber-reinforced polymer composites are 1.5 times superior to the strength of similar phthalic acid based composites.
Effect of Technical Carbon the Deformation-Strength Properties of Low Pressure Polyethylene
Authors: Borukaev Timur A. , Shaov Abubekir Kh. , Archakova Raisa D. , Sultigova Zakhirat
Published: October 2020

The influence of carbon black on the deformation-strength properties of high density polyethylene is considered. It was found that the deformation-strength properties of the polymer matrix change over the entire range of the filler content. The amount of carbon black that can be introduced into high-density polyethylene and obtained a composite material with the optimal combination of stiffness, strength and ductility is established. It was shown that the change in the deformation-strength properties of composites is due to the behavior and influence of carbon black particles on the structure of the polymer matrix.
Organic Aerogels Based on Epoxy Resins: Synthesis and Properties
Authors: Voytik Alexey E. , Malkov Georgiy V. , Kapasharov Artur T. , Kostin Alexey Yu.
Published: October 2020

The aim of this work was to develop methods for the synthesis of organic aerogels based on epoxy resins and to investigate their properties. Aerogels based on DGEBA-epoxy resin were obtained by CO2-supercritical drying of gel samples prepared from acetone solutions of epoxy resin with different amount of catalyst and solvents. As a result, aerogels of different density were obtained; the dependence of density on the solvent content in the samples was revealed. The aerogels were characterized by infrared spectroscopy to define the degree of conversion of the epoxy groups, by SEM to confirm nanoscale morphology of aerogels, as well as by the BET method to determine the specific surface area of the samples and its dependence on the catalyst content and curing conditions.
The Thermal Stability and Mechanical Properties of Non-Segregating Blends of Polyimides with Copoly(Urethane-Imide)s
Authors: Didenko Andrey , Kuznetcov Danila , Vaganov Gleb , Smirnova Valentina , Popova Elena , Ivanov Alexey , Chernitsa Boris , Svetlichnyi Valentin , Yudin Vladimir E. , Kudryavtsev Vladislav
Published: October 2020

The series of compositions containing thermodynamically incompatible flexible blocks of aliphatic polyesters and rigid blocks of aromatic bis (urethane) imides in the volume of polymers was obtained on the basis of multiblock (segmented) poly (urethane-imides) and related aromatic polyimides. The series includes segmented poly (urethane-imides) with different relative content of flexible and rigid blocks, non-segregating mixtures of poly (urethane-imides) and thermoplastic partially crystalline polyimide, statistical copolymers of poly (urethane-imide) with imide, and non-segregating mixtures of statistical copolymers with thermoplastic polyimide. The derived polymer systems were studied using thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis. The deformation and strength properties of film samples are determined. It is shown that the properties of the studied polymers change as their content of imides blocks increases, and the transition from thermoplastic poly (urethane-imide) elastomers to thermoplastic polyimides is observed.
The Influence of Biopolymer Coated Fertilizer on the Agrochemical Parameters of the Soil
Authors: Bamatov Ibragim M. , Rumyantsev Evgeniy V. , Arsanov Magomed M.
Published: October 2020

This papper is about the use of biopolymer of polyvinyl alcohol (PVA) as a coat of different fertilizer granules (Azafoska 16:16:16 and Yara Kristalon 19:19:19) as a core material in presence of nitric acid. The biodegradable polymer layer provides uniform diffusion of minerals into the soil as the PVA shell decays. Scanning Electron Microscope (SEM) and Energy – Dispersive X-ray spectroscopy (EDX - 3600) were carried out for the characterization of bio-modified materials. The agrochemical changes of the soil in terms of macro-and microelements were also determined.
Study of the Influence of the Forming Method on the Physical and Mechanical Characteristics of Thermoplastic Polymeric Materials
Authors: Kuzmin Anton M. , Vodyakov Vladimir N. , Kotin Alexandr V. , Kuznetsov Vyacheslav V. , Murneva Mariya I.
Published: October 2020

This paper presents the results of the study of the effect of polymer materials compression and injection methods of molding on the physical and mechanical properties of the resulting samples. Widely used polymers such as poly-amide, thermoplastic elastomer and polyketone were taken as the objects of study. Granite composites based on polyamide were produced by PolyLab Rheomex RTW 16 twin-screw extruder, then modified with fine powders of schungite, graphite and silicon dioxide. Samples for testing in the form of double-sided blades were obtained by injection molding on a Babyplast 6/10V machine and compression molding on a Gibitre hydraulic press. Elastic-strength tests of the obtained samples were carried out on a tensile testing machine UAI-7000 M.
Optimization of Film Composite Functional Properties for Sewing Products
Authors: Meteleva Olga V. , Bondarenko Ludmila I.
Published: October 2020

The process technological parameters of forming a film composite for making heat-protective clothing have been developed. The peculiarities of its application in sewing production are taken into account. The effect of the initial polymer compositions formulation on the formed composites physical-mechanical and technological properties was studied. It has been found that the use of the composite film material developed reduces the compounds permeability of protective clothing.
The Effect of Surface Treatment of PET Films on Adhesive Properties
Authors: Muratov Iskander , Garipov Ruslan , Efremova Anna , Khasanov Azat
Published: October 2020

In this work we studied the effect of surface treatment of PET films, which are widely used in food packaging, on the adhesion value of ink layers based on polyvinyl chloride. To give high barrier properties to packaging laminates, the films used in their structure are coated with a nanolayer of aluminum oxide (AlOx). However, these films have a disadvantage associated with the low adhesion of adhesive and ink layers to the AlOx nanolayer. To eliminate this disadvantage, aluminium oxide nanolayer is additionally coated with various polymer coatings. In this work we studied the effect of a polyacrylic coating applied on top of an AlOx layer on improving the adhesion of ink layers. For PET films used in food packaging, optical and surface properties are also important. In this regard, additionally we measured surface free energy, coefficient of friction, and optical properties of the studied PET films. We also highlight the relationship of contact angles of wetting and the work of adhesion for the printing ink with the measured adhesion of ink layers.
Synthesis of Poly-N,N–Dialylaminoethanoic Acid and Investigation of his Mutagenic Action on the Test System Drosofila Melanogaster
Authors: Begieva Madina B. , Bittueva Madina , Bogotova Zalina , Begieva Milana , Gidova Elza
Published: October 2020

The resulting monomer is N,N-diallylaminoethanoic acid and a polymer based on it. The structure of the monomer and polymer is confirmed by physicochemical methods. The toxic properties of poly-N,N-diallylaminoethanoic acid were investigated on the Drosophila melanogaster test system. The results obtained allow us to conclude that poly-N,N-diallylaminoethanoic acid in concentrations of 1 % does not have a toxic effect.
Polymeric Composites for Filling Bone Cavities
Authors: Fazylova Dina I. , Zenitova Lyubov A.
Published: October 2020

Polymer composite materials (PCМ) based on low molecular weight siloxane rubber SKTN-A have been developed, which are supposed to be used as osteoplastic materials in maxillofacial surgery. The following materials were used as fillers for the creation of PCM: bentonite, sepiolite, wollastanite. The effect of the type and content of filler on the curing process and the properties of the resulting compositions was investigated.
Cross-Linked PIM-1 Membranes with Improved Stability to Aromatics
Authors: Yushkin Alexey A. , Balynin Alexey V. , Bakhtin Danila , Kirk Richard , Budd Peter M. , Volkov Alexey V.
Published: October 2020

Composite membranes were prepared for nanofiltration of aromatic solvents. Cross-linking with AlCl3 was used to improve the stability of the PIM-1 selective layer in aromatic solvents like toluene, benzene and xylene. Nanofiltration performances of obtained membranes were tested with 4 different aromatic hydrocarbons and with 3 solvents from other classes of solvents. Obtained permeability for aromatic hydrocarbons was above 8,5 kg/m2·h·bar and retention of Remazol brilliant blue R dye with molecular mass 626 was up to 96 %. It was shown that permeability results correlated with Hansen solubility parameter and distance parameter between polymer and solvent. PIM-1 has higher permeability for non-polar hydrocarbons due to higher affinity between polymer and solvent.
Roofing Materials Based on Synthetic Rubbers with Additives - Waste Products
Authors: Abdikarimov Malik N. , Turgumbayeva Raushan Kh. , Sagintaeva Saule , Bergenzhanova Gulim , Rasmukhametova Ainura , Nauryzbayeva Shalhar
Published: October 2020

The paper uses waste from the production of synthetic rubbers, industry, various clays for effective ways to solve the socio-economic and environmental problems of preserving natural resources and preventing environmental pollution. The construction materials industry faces the most important task-the search for non-deficit raw materials that allow partially or completely eliminate expensive conditioned polymers, rubbers and obtain cheaper mastic roofing materials while maintaining their high physical, mechanical and operational properties. Thermomechanical curves of composite materials based on synthetic rubbers with additives were studied. It is shown that the softening of samples of roofing materials No. 325 and No. 326 begins at , 20 % deformation is achieved, respectively, at – (No. 325) and + (No. 326), a sharp increase in deformation is observed, respectively, with a loss of strength: 40 % (No. 325) and 20 % (No. 326). Based on these materials, reinforced mastic roofs have been developed, which have low values of crack resistance. The coefficient of water resistance depends on the base, i.e. the reinforcing materials.
Synthesis of Aromatic Diketoximes and their Complexes with Nickel Salts
Authors: Musaev Yurii I. , Musaeva Eleonora B. , Khashirova Svetlana , Sanakoeva Marina O. , Baykaziev Artur E.
Published: October 2020

The diketoximes of 4,4'-diacetyldiphenyl oxide and 4,4'-diacetyldiphenyl sulfide were synthesized, the possibility of their use for the synthesis of simple and complex polyesters and polypyrroles, as well as the ability to complex with nickel salts.
Organic chemistry used oximes in the 19th century, afterward, as an analytical reagent in the 20th century. Currently, oximes are superior to carbonyl compounds and alcohols in the variety of reactions and the widespread use in synthetic chemistry. Oximes easily turn into other classes of organic compounds – amines, cyano and nitro compounds, carbonyl compounds, heterocyclic compounds, including pyrroles, imidazoles, pyridines, they can be used as suitable compounds with salts of Cu (II), Ni (II), Zn (II), Cd (II), and Co (II).
Oximes with complex heterocyclic and aromatic substituents are used as intermediates in fine organic synthesis.
It should be noted that oximes have a wide spectrum of biocidal action and are used as anti-inflammatory, antiviral, antimicrobial agents, insecticides. Their versatile biological activity is considered in the preparation of antidepressant, sedative, vasodilator and other drugs [1].
Bio-Based Conductive Polymer Composite Materials for Fuel Cells Bipolar Plates
Authors: Faddeev Nikita , Klushin Victor , Tokarev Denis , Smirnova Nina V.
Published: October 2020

Conductive polymer composite materials for polymer electrolyte membrane fuel cells bipolar plates have been successfully prepared from renewable plant biomass sources. The composites are based on various conductive fillers (natural, oxidized and colloidal graphites) and the 5-hydroxymethylfurfural synthesis by-product resin that consists of complex furanic oligomers and polymers. The influences of the resin content and type of conductive filler were investigated. The conductivity of the composite are decreased with increasing resin content, but its mechanical properties are improve. A sample with a resin content of 10 wt. % and colloidal graphite filler have showed the optimal balance between electrical conductivity and mechanical properties. The interfacial contacting resistance, flexural and compressive strength of the composite were 0.035 ohm•cm2, 18.4 MPa and 21.4 MPa, respectively. Composite based on 5-hydroxymethylfurfural synthesis by-product resin and conductive filler (colloidal graphite) are showed a great potential application as bipolar plates for polymer electrolyte membrane fuel cells.
Optimization of the Reaction of Catalytic Cycloalkylation of Phenol with Cyclohexene
Authors: Alekperova Irada I. , Aghamaliyev Zaur Z. , Veliyeva Firuza M. , Rasulov Chingiz K.
Published: October 2020

The paper presents the results of studies of the reaction of the interaction of phenol with cyclohexene (CH) in the presence of a Zeolite-Y catalyst impregnated with phosphoric acid and studying the dependence on the yield and selectivity of the target product on various parameters. As a result of the study of the phenol cycloalkylation by cyclohexene, optimal conditions were found, the yield of which is 81.6 % of theory for the taken CH, and the selectivity is 94.0 % for the target product. The developed mathematical model of the processes of the interaction of phenol with cyclohexene in the form of a regression polynomial made it possible to find the optimal values ​​of the input variables.
Evaluation of Temperature Influence on Tensile Strength and Izod Impact Resistance on Poly Methyl Methacrylate (PMMA)
Authors: da Silva Gilmar Cunha , de Assis Foluke Salgado , Monteiro Sergio Neves , Candido Verônica Scarpini , Rios da Silva Alisson Clay
Published: October 2020

The increasing use of poly methyl methacrylate (PMMA), often replacing tempered glass, is a consequence of its high rigidity, practicality, lightness and transparency. However, current manufacturing standards in the polymer industry recommend specific tests on these materials. The present study aims to mechanically test the properties of poly methyl methacrylate (PMMA) material under conditions that simulate a much more aggressive environment than usual. Infrared spectroscopy (FTIR), thermogravimetric (TG/DTG) tests, Izod impact tests, and scanning electron microscopy (SEM) analysis were performed. The results showed that poly (methyl methacrylate) (PMMA) maintained its tensile mechanical properties up to 105°C. Regarding the impact tenacity, the temperature negatively influenced the performance of this polymer.
Effect of the Heat Treatment on the Microstructure and Morphology of Cigs Thin Films Prepared by RF Magnetron Sputtering at Room Temperature
Authors: da Costa Paulo Victor Nogueira , de Medeiro Rodrigo Amaral , Ferreira Carlos Luiz , Cruz Leila Rosa
Published: October 2020

This work investigates the microstructural and morphological changes on CIGS thin films submitted to a post-deposition heat treatment. The CIGS 1000 nm-thick films were deposited at room temperature by RF magnetron sputtering onto glass substrates covered with molybdenum films. After deposition, the samples were submitted to a heat treatment, with temperatures ranging from 450 to 575 oC. The treatment was also carried out under a selenium atmosphere (selenization), from 400 to 500 oC. Morphological analyzes showed that the as-deposited film was uniform and amorphous. When the treatment was carried out without selenization, the crystallization occurred at or above 450 oC, and the grains remained nanosized. However, high temperatures led to the formation of discontinuities on the film surface and the formation of extra phases, as confirmed by X-ray diffraction data. The crystallization of the films treated under selenium atmosphere took place at lower temperatures. However, above 450 °C the film surface was discontinuous, with a lot of holes, whose amount increased with the temperature, showing that the selenization process was very aggressive. X-ray diffraction analyses showed that the extra phases were eliminated during selenization and the films had a preferential orientation along [112] direction. The results indicate that in the manufacturing process of solar cells, CIGS films deposited at room temperature should be submitted to a heat treatment carried out at 450 °C (without selenization) or 400 °C (with selenization).
Study of CaF2- Doped PbTe Thin Films Grown by Molecular Beam Epitaxy
Authors: Okazaki Anderson Kenji , Abramof Eduardo , Rappl Paulo Henrique de Oliveira
Published: October 2020

We present here a study on the electrical and structural properties of p-type PbTe films doped with CaF2. The layers were grown by molecular beam epitaxy on freshly cleaved (111) BaF2 substrates. The doping level was monitored by the CaF2 solid source cell temperature (TCaF2), which varied from 500 to 1150 °C. The films with low doping level, TCaF2 ≤ 1010 °C, exhibited flat surfaces with crystalline quality close to the undoped PbTe sample. In contrast, samples with high levels of doping (TCaF2 > 1010 °C) presented CaF2 agglomerates on the surface and a worse crystal quality. The hole density at 77 K versus TCaF2 oscillated between 1.3 × 1017 and 3.6 × 1017 cm-3 and did not exhibit a systematic behavior as the fluoride supply is raised. The results indicate that CaF2 is not an effective p-type dopant for PbTe, due to the abscence of a resonant level close to the valence band or to compensation of extrinsic dopant levels.
The Influence of the Addition of rGO and CNT on the Electrochemical Properties of the Batteries the LaNi-Based Battery Alloys
Authors: Soares Edson Pereira , Filho J.C.S. , Casini J.C.S. , Faria R.N. , Takiishi Hidetoshi
Published: October 2020

In this article the results of the negative electrode performance produced by La0.7Mg0.3Al0.3Mn0.4Co0.5Ni3.8 as-cast alloy adding 1 to 10% of carbon nanotube (CNT) or reduced graphene oxide (rGO) were investigated as Ni-MH batteries. The as cast alloy were investigated with X-ray diffraction (XRD) and scanning electron microscopy (SEM). The CNT and rGO were characterized by high resolution SEM-FEG. The discharge capacity obtained during the electrochemical characterization showed that in the addition of 1% rGO the discharge capacity was 332 mAh and 1% CNT 364 mAh , being that the rGO batteries maintaining better cyclic stability during the electrochemical test.
Impact of ZnO Concentration on the Stability of Agglomerates of TiO2 Engineered Nanoparticles: Effects of the pH, Ionic Strength and Zeta Potential
Authors: de Oliveira Elizabeth Mendes , Valadão Izabella Christynne Ribeiro Pinto , de Castro Jose Adilson , da Silval Leonardo Martins , da Silva Darlene Souza , Paresque Mara Carolina do Carmo
Published: October 2020

The stability of nanoparticles in natural aquatic systems is of great interest to the environmental risk assessment. The relevance of this study lies in the fact that nanoparticles are being produced and used in commercial products on a large scale, which makes the need to study its transport through the environment, especially in soil and water important due to their potential interactions with the ecosystems. In this research, the effects of nanoparticles of zinc oxide (NPZnO) in the behavior of nanoparticles of titanium dioxide (NPTiO2) was investigated. The influence of pH, ionic strength and zeta potential of the hazardous nanoparticles into soil landfills are studied using experimental procedures. Leaching experiments were prepared within soil column simulating landfills layers. Leaching experiments were carried out to simulate the capture and attenuation of these nanomaterials in municipal waste landfills. The results found that the presence of NPTiO2 in suspensions increases the stability of the suspensions keeping higher nanoparticles concentrations, while NPZnO promotes rapid sedimentation with lower equilibrium concentration of nanoparticles.
Recycling of Steel-Making Plant Waste into Heavy Clay Ceramic- Industrial Test
Authors: Ribeiro Mônica Manhães , Amaral Lucas F. , Delaqua Geovana C.G. , Vieira Carlos M. F. , Gadioli Monica C. B. , Garcia Julianna M. , Oliveira Michelle Souza , Filho Fabio da Costa Garcia , Monteiro Sergio Neves
Published: October 2020

This work has as its objective to evaluate the effect of incorporation of 10 wt% of a powder waste from the sintering stage of an integrated steel-making plant in the physical and mechanical properties of bricks produced in industrial scale. Environmental tests of leaching and solubilization were performed. The results indicated that the waste slightly increased the water absorption of the ceramic and also increased in 35% its compressive strength. The sulfate parameter was above the maximum limit established by the norm for solubilization test. It was observed a strong efflorescence in the massive bricks and a smooth efflorescence in the perforated bricks.