bluuebunny/crossref_metadata_2025 huggingface dataset:
Dialética, subjetividades e história, ou uma leitura de A lata de lixo da história de Roberto Schwarz
Authors: Breda Fernando Cambauva
Published: December 2021

Escrita no fim dos anos 1960, a peça A lata de lixo da história se insere num momento da maior importância da vida social brasileira e, igualmente, da de seu autor, Roberto Schwarz. Seu contexto de produção foi, do ponto de vista nacional, de acirramento repressivo da ditadura civil-militar brasileira e, do ponto de vista pessoal de Schwarz, de sedimentação de uma virada crítica bastante significativa. Nesse sentido, é interesse deste trabalho analisar a peça à luz das transformações pelas quais passava o país em articulação com uma certa sedimentação de derrota histórica da ideia de formação nacional que ia se afigurando ao jovem Roberto Schwarz. No centro de nossa análise está a noção de dialética, tão central ao ponto de vista materialista de Schwarz. A despeito de variados estudos que têm sido feitos a respeito de sua obra, pouco tem se discutido, a não ser em chave celebratória, sobre o modo como a dialética se opera em seu trabalho. Refiro-me, sobretudo, ao modo como a luta de classes em sua acepção brasileira é figurada pelo crítico, levando em conta, sobretudo, sua visão sobre a margem de arbítrio praticamente absoluto das elites brasileiras e uma noção algo estática das relações escravistas. A escolha pela peça se deu justamente porque ela cristaliza uma convivência de temporalidades contraditórias que revela um certo sentimento de época diante do que significava a ascensão dos militares ao poder em 1964, bem como elucida aspectos contraditórios da produção schwarziana pouco comentados em sua fortuna crítica.
A conservation landscape for the Dry Chaco based on species habitat suitability
Authors: Cuyckens Griet An Erica
Published: December 2021

The Dry Chaco (DCH) is a biodiversity-rich region that contains the largest dry forest in the world. It is seriously endangered and has one of the fastest deforestation rates. Yet, very few conservation efforts have been undertaken to protect this ecosystem, and information to develop efficient and sustainable land-use plans is scarce. This study aimed to design a conservation landscape that would maximize the conservation of the DCH’s ecological integrity, endangered species, and ecological and evolutionary processes. Five focal species of high conservation value were chosen based on their ecological roles, conservation status, or endemism: white-lipped peccary Tayassu pecari, chacoan peccary Catagonus wagneri, giant anteater Myrmecophaga tridactyla, tapir Tapirus terrestris, and giant armadillo Priodontes maximus. We used interviews with local informants to obtain information on species presence and location. Their habitat suitability was modelled and ranked using Maxent software. A conservation landscape was designed by overlapping these spatially explicit models. A systematic conservation planning framework was followed, considering habitat connectivity using Zonation. Interviews proved to be useful for conservation planning in this region with longstanding close ethnozoological relationships. The spatial design obtained was compared with existing land-use policies and protected areas to discuss conservation strategies that could be efficient if applied in the DCH and considering land sharing vs. land sparing conservation strategies. There is a large surface of suitable habitat for the studied species, but their conservation cannot be ensured with the present conservation schemes. We consider land-sharing as a feasible conservation strategy for this region and its species, and identified areas that should be preserved and their optimal connections to increase conservation opportunities for the Dry Chaco.
El pensamiento crítico en las redes sociales. Una propuesta teórica para la educación cívica en entornos digitales
Authors: Gozálvez-Pérez Vicent , Valero-Moya Aída , González-Martín M.-Rosario
Published: December 2021

En el presente artículo aplicamos una metodología de análisis bibliográfi co y hermenéutico con el objetivo de revisar el concepto de “pensamiento crítico”, actualizándolo y adaptándolo al ámbito digital, en especial al entorno de las redes sociales. En el texto se ofrece una reconstrucción del concepto de pensamiento crítico asumiendo un modelo ajustado a las sociedades democráticas, dado el valor que en ellas tienen las interacciones mediáticas evaluadas y producidas desde un pensamiento crítico. Desde estos presupuestos, reconstruimos y articulamos una propuesta para la educación del pensamiento y el carácter (ethos) crítico en las redes sociales.
Fundamentación teórica para la creación de un programa académico de ingeniería y ciencia de datos: una aplicación bibliométrica
Authors: Mendoza-Lozano Frederick Andrés , Quintero-Peña Jose Wilmar , Acevedo-Pabón Oscar Leonardo , García-Rodríguez Jose Félix
Published: December 2021

El objetico es definir un enfoque teórico entorno a la ciencia de datos, que incluya objeto de estudio y métodos, como paso previo para el diseño curricular de un programa académico. El texto inicia con una revisión de la literatura entorno a la evolución del concepto de dato y los fundamentos epistemológicos de la estadística y el análisis de datos, mediante el uso de algoritmos. Se continúa con la bibliometría de la producción científica de mayor relevancia, 2000 artículos, haciendo uso del enfoque de caracterización temática, mediante palabras clave tomadas de trabajos indexados en SCOPUS. Se encontró que la mayoría de las palabras clave y temáticas relevantes se refieren a los métodos de la modelación de datos con algoritmos y a la gestión de tecnología para la administración de grandes bases de datos. Se caracterizó la productividad del análisis de datos derivados de información textual, multimedia y la web. También se revelaron las temáticas referidas a las aplicaciones empresariales dirigidas a la gestión del conocimiento y la inteligencia de negocios. Se concluye que el concepto de dato, como objeto de estudio, se amplía gracias a los alcances del análisis de datos con algoritmos; este método se combina con el enfoque estadístico clásico, que provee modelos formales de mejor interpretación. Se concluyó que el campo de aplicación de la nueva ciencia de datos es bastante amplio, en particular cuando esta ciencia se utiliza en contextos interdisciplinarios. Lo anterior justifica el diseño curricular de un programa académico centrado en esta temática.
Genetic and environmental factors in the determination of general cognitive abilities: a twin study
Authors: Annu  , Dhanda Bimla
Published: December 2021

The present investigation of twin study elucidated the contribution of genetic and environment to a wide range of general cognitive abilities. To conduct twin study 100 pairs of twins from two districts, namely: Bhiwani (n = 90) and Hisar (n = 110) of Haryana State, genetic and environmental influences were assessed in twin study design. The cognitive abilities of twins were measured using the Wechsler Intelligence Scale for Children (WISC-R). Home Observation for Measurement of the Environment (HOME) Inventory was taken to examine the home environment of twins. Heritability estimate was used to analyze the genes contributing to shape the cognitive abilities of twins. The result of heritability estimates revealed that the heritability estimates of general cognitive abilities namely: information (62%), similarities (57%), vocabulary (60%) and comprehension (55%) in Bhiwani district and in Hisar district, the heritability estimates were 58 per cent, 55 per cent, 56 per cent and 51 per cent for information, similarities, vocabulary and comprehension general cognitive abilities, respectively. The findings clearly elucidated that the general cognitive abilities were more influenced by genetic background than the environmental factors. The paternal involvement and physical environment were strongly associated with general cognitive abilities of twins. The monozygotic twins were more correlated in their general cognitive abilities than the dizygotic twins.
Food consumption pattern and Body Mass Index assessment along rural-urban interface of the South Indian mega city of Bangalore
Authors: Geetha K. , Vijayalakshmi D. , Yatnatti Shilpa , Dittrich Christoph
Published: December 2021

Food consumption pattern are predictors of health and nutritional status. Bangalore is one of the rapidly urbanizing South Indian megacity with a population of 11 millions. Study highlights gradient changes with reference to food consumption pattern and Body Mass Index (BMI) among households in the rural-urban interface of Bangalore. A total of 300 middle income households were selected by purposive random sampling technique. Standardized schedule was used to collect information on food consumption pattern and BMI using standard protocols. Consumption of energy dense foods was significantly more than adequacy. Average dietary diversity score was less than 50 per cent which is indicative of routinely consumption of only few food groups among households. Fried (51.4%) and Readyto- eat (51.0%) foods consumption was more frequent in rural. Prevalence of overweight (24.5%) and obesity was more in urban (7.1%). Overall, incidences of overweight and obesity were more compared to underweight. This reveals, that there is a need for intervention and promotion of diversified and functional foods to address overweight and obesity, which are the root causes for non-communicable diseases in order to protect health and nutritional status of individuals along rural-urban interface of Bangalore.
Designing ofKurtis with adapted sculpture of city palace, Udaipur
Authors: Choubisa Falguni , Babel Rupal
Published: December 2021

Indian culture and its rich heritage of tradition are reflected in many of the various region of this country and Rajasthan is famous for its profile art treasures. The present study explores the possibility of designing of kurtis with adapted sculpture of city palace, Udaipur. The objective of present study was to develop value added Kurtis using motifs through stencil printing. Researcher used previously adapted sculpture of city palace for kurti design and developed ten placements for Kurtis design by using coral draw software and get it evaluated by experts. To find to five placements researcher used frequency percentage and mean per cent score was calculated to analyze the data. 10 motifs were selected for placement designs, 10 placements were developed by using previously selected and adapted motifs and top 5 placements were selected for development of Kurtis designs. Developed designs were innovative and efforts of the researcher was appreciated and all the designs were cost and effective and new style for wearers.
Nutritional status and nutritional anaemia among adolescent girls: a study of adolescent beneficiaries of SABLA/SAG scheme under ICDS of Banka district of Bihar
Authors: Bharti Kusum , Kumar Manoj , Prasad Pramila
Published: December 2021

Adolescent girls are the worst sufferers of the ravages of various forms of malnutrition because of their increased nutritional needs and low social power. Scheme of Adolescent Girls, is an important scheme of the Ministry of Women and Child Development, Govt. of India for the improvement of health and nutritional status of Adolescent Girls under the platform of ICDS. Objective: This study aimed at assessing nutritional anaemia of Adolescent girls of rural areas of Banka District receiving the benefits of the nutritional intervention of SABLA/SAG yojna under the ICDS and other related schemes. Method: For this study, Anthropometry measurement, Services of SABLA programme, Haemoglobin Level, SABLA Kishori Card Observation and Questionnaire method as tools were used. Result: Out of 500 AGLs from SABLA of 50 Rural AWCs, 79% are underweight whereas 67 % stunted. The nutritional status of 85% is undernourished i.e. according to the BMI only 15 % girls are in normal range. 78% AGLs are anaemic in which 24% moderate and 9 % are severe anaemic i.e. Hb level <7g/dl. More than 80% AGLs under SABLA at Banka district are undernourished whereas 85 % are anaemic. It may be concluded that this scheme at studied area is not being implemented in a proper way.
Standardization of Gujarati sweets recipes and assessment of their nutritive values
Authors: Rathod Gita , Dave Nilambri R.
Published: December 2021

In ancient times man was consuming row foods. With the search of fire he started cooking foods. As the time passed with the evolution of modern technology various kinds of processed foods are now available. In general, Gujarati food pattern is almost a balanced food. Presently, nutritive values of foods are generally derived from food tables, which are based on raw foods. It has been established that there is a definite loss of nutritive values especially vitamins and minerals due to cooking procedures. This study contained of a survey work of various food preparations daily consumed by various families residing in Saurashtra. This will highlight the food pattern of this region. A standard recipe was derived for all food preparations of people of Saurashtra region based on the results of the survey, which then was prepared in laboratory and analysed for different nutrient contents. Recipes which were commonly included in Gujrati sweets. It can be revealed from Table 1 that, Shira contains good amount of moisture compare to other cereal products of sweets. Protein was found to be considerably high in Gol papdi compare to Laddu because in Gol papdi Jaggery was used and in Laddu there was used a powder sugar. Fat content of Laddu and Gol papdi is very much high and contains low fat. Carbohydrates content of comparatively high because there is low fat content. Because of the high fat content of Laddu and Gol papdi these products were found to be high in energy level compare to other products. Carotene level was also found high in Laddu and comparative to Gol papdi and Shira because there was use of both (oil and Ghee) in Laddu and Gol papdi because there was use of Jaggery and was lowest in Semolina Shira because semolina contents low Iron compare to wheat. Ash was found to be highest in Gol papdi and lowest in Semolina Shira.
Academic procrastination among University students – A gender based study
Authors: Gohain Rashmi Rekha , Gogoi Sampreety
Published: December 2021

Academic procrastination is a tendency of delaying academic-related tasks due to one or other reasons until the last minute of experiencing anxiety and stress associated with it. The present study aims to investigate gender differences in the reasons for academic procrastination among University Students. The sample consists of 199 undergraduate’s students who were selected from Assam Agricultural University (AAU) using Solvin’s formula and proportionate allocation. The procrastination Assessment Scale for Students (PASS) (Solomon and Rothblum, 1984) was administrated to collect the data. The difference between male and female in reasons was checked by using Z test and the results revealed that there is no significant difference in reasons of academic procrastination in relation to gender. Procrastination leads to failure of meeting individual’s academic goals so proper recognition to delaying behaviour is very much important in today’s time for a successful and accomplished life.
Designing of bolero jackets with abstract motifs
Authors: Bhargava Deepti , Balyan Akansha
Published: December 2021

The present study was undertaken by the investigator to add a new range and interesting ideas which can break monotony and give a touch of novelty in designing of bolero jackets using abstract motifs.Bolero jackets contribute to create a variety of styles which can provide a different look with fashion needs. Thirty abstract motifs were collected and best 5 motifs were selected for the designing of bolero jackets. Various types of designs were prepared using different features for bolero jackets. Finally, five designs were selected to construct prototypes on the basis of consumer preferences.Selected motifs were digitally printed on bolero jackets. Then prototypes were constructed and evaluated. Developed garments were successful to achieve the objectives of the study. All prototypes were liked by the respondents. Thus, the designing of bolero jackets was found very creative and useful for consumers.Present study has fulfilled its objectives with high performance of appreciation.
Reviewing interventions to enhance comfort and productivity of workers in Enterprises
Authors: Melkani Ekta , Singh Kiran , Mehta Manju
Published: December 2021

The following study deals with the detailed reviews regarding the interventions that have been done globally in the sector of entrepreneurial interventions in aspect of work simplification. Various standards hence can be considered while referring to different designs for enterprises, especially small scale enterprises. The studies have revealed the musculoskeletal disorders from manual material handling (MMH) works often involving strains and sprains to the lower back, shoulders, and upper limbs. The ergonomic interventions are found to give comfort to the workers in various postures. It is concluded that the design of the system must be incorporating to the worker, equipment, and environment as a whole.
Aging: well being and development in elderly
Authors: Pallavi  , Borah Tulika
Published: December 2021

The aim of the present study is to introduce the well- being and aging development during old age. In old age peoples are not more productive as in early stage of life. They need others support for doing some activities. Sometimes they feel stressed and depressed about that. The current study indicated that physical condition of old age person, sociodemographic factors, social network characteristics, and activity level all seem to affect subjective well-being in later life. In the present study discuss several different forms of well-being that play a vital role in the lives of elderly and it helps them to live longer and safer.
Effect of amount and time of incorporation of forest litter on soil physical properties
Authors: Chinir Paardensha Ivy , Dutta Manoj , Kichu Rizongba , Ram Sewak
Published: December 2021

A field experiment was conducted to evaluate the effect of forest litter and its time of incorporation on soil physical properties. The study showed that plots with forest litter incorporated at 45 DBS (Days Before Sowing) had significantly higher soil moisture content as compared to those incorporated at 30 DBS after 30 and 60 DAS. However, the difference in the time of incorporation had no significant effect on soil moisture content at 90 DAS. At 30 DAS, application of forest litter @ 6 t ha-1 and 9 t ha-1 significantly increased the soil moisture content at a rate of 4.11 and 11.42 per cent, respectively over control. At 60 DAS, application of forest litter @ 3 t ha-1, 6 t ha-1 and 9 t ha-1 significantly increased the soil moisture content at the rate of 15.05, 17.26 and 25.65 per cent, respectively over control. At 90 DAS, a trend was noticed which showed that soil moisture content significantly increased at a progressive rate with each increase in the dose of forest litter application. At 90 DAS, the addition of forest litter @ 3 t ha-1, 6 t ha-1and 9 t ha-1 increased the soil moisture content @ 10.16, 17.84 and 22.20 per cent, respectively over control. The plots with forest litter incorporated at 45 DBS had significantly higher hydraulic conductivity, per cent aggregates and mean weight diameter as compared to those incorporated at 30 DBS. However, the difference in the time of incorporation i.e., at 30 and 45 DBS had no significant effect on bulk density, particle density and water holding capacity. Incorporation of forest litter @ 3 t ha-1, 6 t ha-1 and 9 t ha-1 significantly decreased the bulk density at the rate of 3.67, 8.65 and 14.14 per cent; while particle density increased at the rate of 2.59, 3.42 and 6.61 per cent, respectively when compared to control. The addition of forest litter @ 3 t ha-1, 6 t ha-1 and 9 t ha-1 resulted in a significant increase in water holding capacity and hydraulic conductivity at a rate of 3.72, 4.65 and 6.77 per cent and 24.13, 32.30 and 41.73 per cent, respectively over control. Further, the application of forest litter @ 3t ha-1, 6 t ha-1 and 9 t ha-1 significantly increased the per cent aggregate and mean weight diameter of the soil @ 1.77, 3.49 and 6.58 per cent 17.31, 26.28 and 41.35 per cent, respectively over control. The study revealed that incorporating 9 t ha-1 of forest litter at 45 DBS had the most beneficial effect on soil physical properties.
In vitro evaluation for the efficacy of the chemicals/ antibiotics, botanicals and bioagents against black rot (Xanthomonas campestris pv. campestris) of cauliflower in plains of Kerala
Authors: Prasanna S. Lakshmi , Ravi S.
Published: December 2021

Cauliflower (Brassica oleracea var botrytis) is one of the important cool season vegetable crop grown in India. One of the major disease which causes huge loss (50-70%) is black rot of cauliflower caused by Xanthomonas campestris pv. Campestris. In the present studyin vitro evaluation of chemicals/ antibiotics, botanicals and bio agents were studied and best selected treatments were studied at field level. Two antibiotics-Streptocycline, Tetracycline, (100,200,250ppm); Two chemicals- Copper oxychloride, Copper hydroxide, (0.15%, 0.2%); one combination of antibiotic and chemical Copper oxychloride + Streptocycline (0.15%+100ppm). Four botanicals leaf extract of tea, tea waste decoction, garlic extract, turmeric extract at two different concentrations 5 and 10 per cent and two bioagents Bacillus subtilis and Pseudomonas fluoresces were tested for their efficacy against Xanthomonas campestris pv. Campestris. The results were garlic extract 10 per cent was found to be effective against the pathogen followed by tetracycline 250 ppm. The untreated control recorded the maximum disease incidence, followed by turmeric extract 10 per cent application. But there observed no significant difference among the treatments Tetracycline 250, 200 ppm, P. fluorescens, copper hydroxide 0.2%, garlic extract 5 per cent and turmeric extract 10 per cent are found to be on par.
Effect of zinc and boron on seed yield and quality of onion (Allium cepa L.)
Authors: Arunkumar S. H. , Hilli Jitendra Kumar S. , Uppar D. S.
Published: December 2021

The field experiment was carried out in the olericulture unit, MARS, University of Agricultural Sciences, Dharwad during 2019-2020 to study the effect of zinc and boron on seed yield and quality of onion on variety cv. Bhima super at different levels of both basal and foliar application. The treatments consists of soil application of zinc sulphate (5 kg/ha and 10 kg/ ha), Borax (4 kg/ha and 6 kg/ha) and foliar application of zinc sulphate (0.25 % and 0.5 %), Borax (0.1 % and 0.2 %) and control without micronutrient application replicated thrice in a Randomized Block Design. The foliar application was given at 45 days after bulb planting. From the present investigation, a significant increase in seed yield and quality parameters were recorded with foliar spray of zinc sulphate (0.5 %) and borox (0.2 %) viz., seed yield per plant (4.29 g), seed yield per plot (214.13 g) and seed yield per hectare (9.91q/ha). The germination percentage was found maximum from the treatment foliar application of zinc sulphate (0.5 %) (84.8%) and the other seed quality parameters was found best from the treatment foliar spray of ZnSO4 (0.5%) and B (0.2 %) i.e., higher shoot length (8.83 cm), root length (7.21 cm), seedling vigour index (1352) and test weight (3.75 g). The non-significant differences were observed due to influence of soil and foliar application of zinc and boron on electrical conductivity and seedling dry weight.
Comparative nutritional evaluation of pods of Leptadenia pyrotechnica from three different regions of Rajasthan
Authors: Rathore Mala
Published: December 2021

Leptadenia pyrotechnica (Khimp) is a small shrub belonging to family Asclepiadaceae found growing in the arid zone of Rajasthan. It has ethnopharmacological importance and known for its stem fibre. Its edible unripe fruits contribute significantly to the food and energy needs of rural populations. These are known as khimpoli and cooked as vegetable. Comparative evaluation of nutritional composition of the pods from different regions of Rajasthan was carried out so as to promote these underutilised fruits. Analysis was carried out using standard AOAC methods. Fruits were found to be rich in ash (5.03 % to 5.57 % ), fat (5.35 % to 6.82 % ), protein (13.28% to 18.56 %), sugar (5.61 % to 6.54 % ), vitamin C (66.62 to 90.1 %) and minerals viz., Cu, Zn, Fe, Mn, Mg, P, K, Ca and Na. Results indicated that khimp pods can be promoted as supplementary food in arid region.
Effect of wheatgrass biscuits on hematology of wistar albino rats
Authors: Runjala Suneetha , Murthy Y.L.N.
Published: December 2021

The exploitation of herbal -based inhibitor compounds in food stuffs and medicine are gaining a good deal of interest due to potential health advantages. Recent researchers have attempted the exploration of traditional and plant-based therapeutical and medicinal preparations using bio-chemical analyses and in-vitro experimentation. The effect of wheatgrass biscuits on hematological parameters were studied in Wistar albino female rats for 21 days. The wheatgrass powder 20, 30 and 40 g per 100g incorporated biscuits prepared into pellet form labelled as V2, V3 and V4 formula supplemented to 3 sample groups normal laboratory diet to 1 control group under laboratory conditions. The average mean food efficiency during 21 days of supplementation recorded that control group has the highest efficiency food intake than sample groups. Group 3 has the lowest efficiency intake fed with V4, than group 1 and group 2 fed with V2 and V3. The results showed significant increase in RBC, WBC, Hematocrit, MCV and decreased levels of MCH in all groups. At the end of the study microflora contamination was estimated by using fecal collection of rats. Lactobacilli colonies were 6 to 7cfu/g were identified as creamy white and small colonies on lactobacilli as Gram positive on MRS agar plates, which are under permissible limits. Less bacteria indicates that rats are not affected by any food poising during 21 days. E. coli colonies exhibited a metallic sheen on Sabouraud’s agar medium and counted 2 to 3 cfu/g appeared as shiny white colonies as gram negative. Yeast appears as gram-positive globules. It was found that the wheatgrass biscuits effectively improved normal haematological and physical body parameters without signs of 1any abnormalities.
Influence of mineral mixture feeding in indigenous cattle
Authors: Choudhari D.M. , Nandre D.R.
Published: December 2021

The field assessment of mineral mixture conducted in Dhule district of Maharashtra State, to perceive the influence of mineral mixture feeding on milk yield and fat content in indigenous cattle.Cow animals were selected randomly from two villages of Dhule district, one is from Dhule Tahsil (Mohadi) and second one is from Sindkheda Tahasil (Tavkheda), respectively. 26 cows were selected third stage of lactation and divided into two groups of 13 animals in each village. First group treatment T1 not fed additional mineral mixture, which is farmers practice in that particular area. Second group treatment T2 fed with 80 g mineral mixture daily until 90 days of lactation.This assessment conducted during year 2019- 20 and 2020-21, respectively. In result it was observed from the result, the yield of milk is more in treatment T2 (20.27 %) over treatment T1. In respect to fat percentage, treatment T2 had shown slightly more fat content (3.77 %) over rest of the farmers practices T1. In conclusion mineral mixture supplementation resulted in increased milk yield. However, no significant effect observed on milk components particular to fat during this feeding trial.
Development of nanosized catalysts for processing synthesis gas to methanol
Authors: Chekushina Tatiana , Lianzi Zhang , Vorobyev Kirill
Published: December 2021

Conversion of carbon dioxide into chemical waste-free feedstock (carbonates, cyclocarbonates, synthesis gas) requires the use of a two-stage reaction (conversion of carbon monoxide under pressure, followed by purification of the converted gas from carbon dioxide with hot potash or monoethanolamine and removal of residual carbon oxides by catalytic hydrogenation) of the reaction. The main problem with this transformation is that, for energetic reasons, these reactions are difficult to coordinate with each other. To ensure the compatibility of the processes from a thermodynamic point of view, appropriate nanocatalysts are needed to obtain a useful product in the course of the reactions. The authors carried out field tests of various catalysts, discovered the compatibility of the reaction with two catalysts with the required properties: a copper compound for the first stage of the reaction and a compound of zinc oxide for the second stage, and also demonstrated the feasibility of this reaction using phenylethylene contained in a hydrocarbon compound. The numerous processes that can be used to produce methanol can be divided into three categories: indirect, direct, and biofuel. Indirect conversion is widespread throughout the world. This conversion takes place in a process in which biomass, coal or natural gas is converted to a mixture of hydrogen and carbon monoxide known as synthesis gas. The syngas is converted to methanol using a variety of conversion methods. Research on the development and improvement of nanocatalysts for the chemical processing of carbon dioxide into methanol has been carried out. An algorithm has been developed for modeling the composition, structure, and properties of nanocatalysts, and a number of new compounds have been synthesized that are capable of retaining cations with different oxidation states and sizes in the crystal lattice. Work has been carried out to improve nanocatalysts based on nickel for deep methanol hydrotreating.
Mathematical model of material substance transformation in nature
Authors:   Institute for Integration and Professional Adaptation, Gurevich Garold
Published: December 2021

The definition of the formation of the center of equal pressure is given. The process of concentration of a material substance in the center of equal pressure is investigated. The process of the formation of substances in the process of concentration of a material substance in the center of equal pressure as a result of an increase in pressure is investigated
The field of algebraic integrals of equations of motion of a complex mechanical system
Authors:   Problems of Precision Mechanics and Control Institute Russian Academy of Sciences, Makeyev Nikolay
Published: December 2021

Criteria for the existence of certain types of algebraic first integrals of the equation of motion of a mechanical system of variable mass composition and variable configuration are given. The carrier body of the system (base body) rotates around a fixed pole in a stationary homogeneous gravity field under the influence of specified nonstationary forces. The types of partial integrals are indicated and restrictions are established that determine their existence.
Modeling of discrete control of antiviral immune response in conditions of uncertainty
Authors:   Perm State University, Chirkov Mikhail , Rusakov Sergey ,   Perm State University
Published: December 2021

In this paper is considered numerically solving a problem of discrete control with uncertainty of the immune response in infectious disease. The problem of discrete control is described by a nonlinear system of ordinary differential equations with a retarded argument. Control under conditions of uncertainty implies that the parameter values are unknown and parameter estimation is adjusted as new experimental values become available. In order to solve this problem, the algorithm that allows us to construct a control function and at the same time to identify parameters within mathematical model of the infectious disease is proposed. By means of the proposed algorithm, the treatment programs based on an immunotherapy are constructed and parameters of the mathematical model of antiviral immune response are identified. It is shown that immunotherapy allows us to effectively cure the acute form of a disease.
Mathematical models of centers of equal pressure in stellar systems
Authors:   Institute for Integration and Professional Adaptation, Gurevich Garold , Lutmanov Sergey ,   Perm State University, Penskiy Oleg ,   Perm State University
Published: December 2021

Mathematical models are proposed that allow calculating the coordinates of the centers of equal pressure in stellar systems and solving the inverse problem of determining the radiation sources of a material substance during the formation of macro-bodies. It is shown that the solutions of direct and inverse problems are not unique.
Research of prospects of application of software environments of simulation modeling in the development and optimization of mechanical engineering production
Authors:   Federal state budgetary educational institution of higher education ", Zharov M. V. ,   Moscow Aviation Institute",   (National Research University)
Published: December 2021

The article presents the results of the market research of applied simulation programs from the point of view of the possibility and expediency of using the latter in the development or optimization of technological processes at domestic machine-building enterprises. The features of technological processes of mechanical engineering and aircraft construction at domestic enterprises are analyzed. The features of the production of metal-intensive products and semi-finished products are studied from the point of view of the feasibility of simulation modeling of these processes. The expediency of conducting simulation modeling of machine-building industries is determined, which provides adequate analysis results at minimal cost compared to other modeling methods. The main criteria for selecting a specific simulation software are defined.
The Perm algebraic school of S.N. Chernikov and its predecessors
Authors:   Perm State University, Polovickiy Yakov
Published: December 2021

A brief information about chief mathematicians who have been working in Perm State University during period since 1916 to 1951, and history of the S.N. Chernikov’s permian algebraic school are bring.
Pyridylimine palladium(II) complexes: one-pot synthesis and monoamine oxidase inhibition
Authors:   Institute of Technical Chemistry Ural Branch of the Russian Academy of Sciences, Denisov Mikhail S. , Gagarskikh Olga N. ,   Institute of Technical Chemistry Ural Branch of the Russian Academy of Sciences, Utushkina Taisiya A. ,   Perm State University
Published: December 2021

An efficient one-pot synthesis of the cis-pyridylimine palladium (II) complexes is reported. The compo- sition and structure were proved by NMR, IR, X-ray, and elemental analysis. The monoamine oxidase inhibition activity of synthesized complexes, including six complexes previously unknown, were inves- tigated on native mouse brains. Some of the synthesized compounds: cis-dichlorido-2,6-dimethyl-N- ((pyridin-2-yl)methylene)anilinepalladium(II), cis-dichlorido-4-nitro-N-((pyridin-2-yl)methylene)- anilinepalladium(II), and cis-dibromido-2,6-di(propan-2-yl)-N-((pyridin-2-yl)methylene)aniline- palladium(II) inhibited monoamine oxidase with moderate activity (IC50: 13.09–17.66 μМ). None of the studied compounds showed cytotoxic activity against HEK-293 cell line (human kidney embryonic cells). Acute systemic toxicity assay, that is conducted by intraperitoneal injection of cis-dichlorido-4- nitro-N-((pyridin-2-yl)methylene)anilinepalladium(II) indicated low toxicity (LD50> 5000 mg / kg) for outbred stocks mice. Bioavailability was assessed by logP’s measurement.
Development of a spectrophotometric method for determination of ions Cu (II) C N- (2-hydroxybenzoyl) -N '- (p-tosil)hydrazine in ammonia media
Authors:   Perm State University, Elchishcheva Yulia B. , Gorbunova Ksenia S. ,   Perm State University, Pavlov Petr T. ,   Perm State University
Published: December 2021

A spectrophotometric method for the determination of Cu (II) ions with N- (2-hydroxybenzoyl) -N '- (p-tosyl) hydrazine (GBSH) in ammonia media has been developed. The optimal conditions for the formation of a complex compound are found: the wavelength of maximum light absorption; pH complexation; optimal time for color development; the amount of photometric reagent. Under optimal conditions of complexation of GBSG with Cu (Ⅱ) ions (λ = 401 nm, pH = 9.2, τ = 30 minutes, VGBSG = 3.75 ml), a calibration graph is constructed. The Bouguer-Lambert-Beer law is fulfilled in the range from 0.13 to 1.59 mg Cu (II) / 25 ml. The true molar light absorption coefficient of the complex compound of HBSG with Cu (Ⅱ) ions in the ammonia medium was 1480. The molar ratios in the solution of the complex compound were determined by the methods of saturation, shift of equilibria and conductometric titration - [Cu (Ⅱ)]: [HBSG] = 1: 1. According to Babko's method, the conditional constant of stability of the GBSG complex with Cu (Ⅱ) ions was calculated and it was 4.4 × 1010. The reproducibility and relative error of the developed photometric technique were determined by the method of mathematical statistics.
Synthesis and optical properties of new 4-substituted pyrimidines - D-A type chromophores
Authors:   Laboratory of Forensic Medical Expertise, Ministry of Justice of the RF, Drachjova Elena S. , Shavrina Tatyana V. ,   Perm State University, Shklyaeva Elena V. ,   Perm State University, Abashev Georgy G. ,   Perm State University,   Institute of Technical Chemistry, Ural Branch, Russian Academy of Sciences
Published: December 2021

The set of 4-aryl(hetaryl)pyrimidines, where aryl/hetaryl is a highly electron donating substituent was synthesized. Optical and electrochemical properties of the synthesized compounds were studied and the values of a forbidden band gap energy ( ) were determined. The narrowest bandgap was found to be inherent to 4-ferrocenylpyrimidine (1.8 eV) and the most long-wavelength emission maximum ‑ to para-substituted pyrimidine which structure embeds a thiophene moiety between N-hexylcarbazolyl fragment and the pyrimidine core (577 нм).
The influence of sodium carboxymethylcellulose and sodium chloride on the precipitation of calcium sulfate dihydrate
Authors:   Perm State University, Melnikova Polina K. , Kistanova Natalya S. ,   Perm State University, Kudryashova Olga S. ,   Institute of Natural Sciences Perm State University
Published: December 2021

The inhibition of gypsum was investigated at 25C in aqueous 0,7 and 1,5 mol/l NaCl solutions by so- dium carboxymethylcellulose (CMC-1000, with the degree of polymerization of 1000 units).The efficiency of inhibition was estimated from measurements of the calcium concentration in the supersaturated calcium sulfate solutions (0,15 mol/l) during the precipitation process by the standard procedure of complexometric titration. It was observed that the presence of NaCl exhibits synergistic effect on the performance of CMC-1000. In the presence of CMC-1000 at 0,5 g/l inhibitor concentration and sodium chloride at 0,7 mol/l concentration induction time, preceding the formation of the gypsum, increases from 100 (without NaCl) to 630 min. Induction times at 0,1 g/l CMC-1000 and sodium chloride at 0,7 and 1,5 mol/l concentrations are 60 and 32 min respectively. The results of X- ray powder diffraction indicated that dihydrate calcium sulfate and sodium chloride present in solid phase.
Configuration and isomeric composition of rubbers: determination by 1H and 13C NMR spectroscopy
Authors:   Perm State University, Krasnovskikh Marina P. , Shirinkin Andrey V. ,   Perm State University, Mokrushin Ivan G. ,   Perm State University
Published: December 2021

Nuclear magnetic resonance (NMR) spectroscopy is a convenient method for studying the structure and isomeric composition of diene rubbers. A simple and reproducible method is proposed for determining the content of both rubber and impurity compounds, which does not require additional sample preparation. Formulas for calculating the composition of industrial products and determining the initial substances are given, the applicability of the analysis method is confirmed. In the process of work, rubbers of various brands were analyzed, their configuration-isomeric composition was established. It was found that the integration ranges given in the literature earlier and the methods for processing 1H NMR spectra differ, the signals of the groups often overlap in the spectrum, which increases the calculation error. It is shown that the structure of the industrial products under study is established most accurately by carbon proton resonance spectroscopy, and the calculation based on the PMR spectra allows confirming the data obtained with sufficient accuracy.
Passivation of chromium disilicide in acidic media
Authors:   Perm State University, Shadrin K. V. , Panteleeva Viktoria V. ,   Perm State University, Shein А. B. ,   Perm State University
Published: December 2021

The anodic behavior of CrSi2 electrode in 0,5 M H2SO4, 0,5 M HClO4, 0,5 M HNO3 and 0,5 M HCl solutions has been studied by the methods of polarization, capacitance, and impedance measurements. It has been concluded that in the process of anodic oxidation at potentials from corrosion E to transpassivation E inclusive, an oxide film is formed on the surface of chromium disilicide in the studied media, which is close in composition to SiO2 (with a small content of chromium oxides). The presence of this film on the silicide surface determines its high chemical resistance in the studied solutions. The thickness of the oxide film on CrSi2 has been calculated depending on the potential and composition of the electrolyte. The growth constant of the oxide film has been determined.
On the extrema on the potential dependence of the charge transfer resistance in the hydrogen evolution reaction
Authors:   Perm State University, Kichigin Vladimir I.
Published: December 2021

The shape of the charge transfer resistance Rct versus overpotentialh curves for the hydrogen evolution reaction (Volmer – Heyrovsky mechanism, Langmuir isotherm for adsorbed hydrogen) was analyzed. It was shown that, depending on the kinetic parameters of reaction steps, three cases are possible: (i) there are no extrema on these curves; (ii) there is one maximum; (iii) there are a minimum and a maximum. Some ways for obtaining kinetic parameters from the curves with extrema are discussed. It was shown that the rate constants and transfer coefficients of all steps can be determined from logRct–h curve alone if there are a minimum and maximum of Rct in cathodic region. In the absence of the extrema, the amount of kinetic information gained from logRct–h plots is considerably reduced.
Students' Knowledge Sharing Behaviours and Sense of Online Learning Community in Online Learning Environments
Authors: ERDOĞMUŞ Cavit , ÇAKIR Recep , KORKMAZ Özgen
Published: December 2021

This study is conducted to find out the correlation between students' knowledge sharing behaviors and learning community feeling in online learning environments. Correlational survey model was conducted in this study. The study group is consisted of 139 participants (46 male, 93 female) who are enrolled in distance and undergraduate and associate degrees in the Distance Education Centre of Amasya University in Turkey. The Distance Education Centre uses LMS software. In this study, 9-question Personal Information Form was used to get the demographic information of the participants. With the help of a personal information form, the participants were asked about their gender, class, department, which devices they used for LMS, their weekly stay in the LMS and the number of logins to the LMS. Also, the Sense of Community in Online Learning Scale used to collection data. A total of 139 participants were reached during the 5-week data collection process. The collected data were analysed with SPSS 25.0 program. As a result, participants' sense of community in online learning and knowledge sharing behavior were high. There was a moderately positive relationship between sense of community in online learning and knowledge sharing behavior in online learning. Also, students’ knowledge sharing behaviors and sense of community in online learning environment are affected by grade level, department, number of entry and online duration.
State of prediction of the critical thinking dispositions of primary school teacher candidates through their self-efficacy for STEM practices
Authors: AYDIN GÜRLER Sümeyye
Published: December 2021

The aim of the present study was to identify the state of prediction of the critical thinking dispositions of primary school teacher candidates through their self-efficacy for STEM. The study was designed subject to the correlational survey model with the sample group comprised of 295 primary school teacher candidates continuing their education at the two education faculties of a state university in Southeastern Anatolia Region of Turkey during the 2020-2021 academic year who were identified in accordance with the proper sampling method. The data were collected via, “Self-Efficacy Scale for STEM Practices” and “Critical Thinking Disposition Scale”. Descriptive analysis was used for determining the self-efficacy for STEM practices and critical thinking dispositions of primary school teacher candidates; correlation analysis was used for illustrating the relationship between self-efficacy for STEM practices and critical thinking disposition along with its sub-dimensions; linear regression analysis was used for identifying the state of prediction for critical thinking disposition and its sub-dimensions through self-efficacy for STEM practices whereas stepwise multiple regression analysis was used for determining the state of prediction for critical thinking disposition through gender and self-efficacy for STEM practices sub-dimensions. Based on the analysis results, the self-efficacy for STEM practices and critical thinking dispositions of teacher candidates are at a good level. There is a positive and statistically significant correlation between self-efficacy for STEM practices and critical thinking disposition and its sub-dimensions. It was illustrated that self-efficacy for STEM practices is a statistically significant predictor of critical thinking disposition and its sub-dimensions and that tenacity-patience was the variable that was predicted the most among these sub-dimensions whilst the stepwise multiple regression analysis set forth that self-efficacy belief was the predictor that made the highest contribution to critical thinking disposition. Various suggestions were made based on the results of the study.