bluuebunny/crossref_metadata_2025 huggingface dataset:
Analisis Kepuasan Nasabah Mobile Banking Pada Bank BCA
Authors: Novitasari Cynthia Anggraini , Manggabarani Alfatih Sikki , Astuti Miguna
Published: August 2021

Penelitian ini dilaksanakan dengan tujuan mengetahui: (1) apakah kualitas layanan berpengaruh secara signifikan terhadap kepuasan nasabah mobile banking BCA (2) apakah kepercayaan nasabah berpengaruh secara signifikan terhadap kepuasan nasabah mobile banking BCA. Populasi yang dipergunakan yakni pengguna layanan mobile banking BCA, dengan sampel sejumlah 75 individu, melalui metode non-probability sampling terutama accidental sampling. Data oleh peneliti diperoleh dengan menyebarkan kuesioner melalui google form dimana disebar melalui media sosial. Teknik analisisnya mempergunakan Partial Least Square (PLS), dan diperoleh hasil, (1) kualitas layanan berpengaruh signifikan terhadap kepuasan nasabah pada bank BCA dengan nilai koefisien jalur sebesar 0,318. (2) kepercayaan berpengaruh signifikan terhadap kepuasan nasabah pada bank BCA dengan nilai koefisien jalur sebesar 0,602. Berlandasakan hasil itu, BCA perlu mempertahankan kualitas layanannya dan kepercayaan nasabah mobile banking BCA sebab bisa memberikan pengaruh terhadap kepuasan nasabah.
ANALISIS STRATEGI BISNIS PLAZA SENAYAN MENGGUNAKAN METODE THREATS, OPPORTUNITIES, WEAKNESSES, STRENGHTS
Authors: Jatender Chris , Permana Denny Rianditha Arief
Published: August 2021

Plaza Senayan merupakan salah satu pusat perbelanjaan premium yang berada di Jakarta, beroperasi sejak tahun 1996. Penelitian ini bertujuan untuk menganalisis strategi bisnis Plaza Senayan dengan menggunakan metode analisis TOWS. Analisis strategis bisnis dalam penelitian ini meliputi analisis kekuatan, kelemahan, peluang dan tantangan pada Plaza Senayan dalam menjalankan bisnisnya, sehingga dapat digunakan oleh Plaza Senayan sebagai referensi dalam mempertahankan dan mengembangkan kegiatan usahanya. Penelitian dilakukan dengan analisis TOWS yang terdapat analisis lingkungan internal yaitu kekuatan (Strenght) dan kelemahan (Weakness) serta analisis lingkungan eksternal yaitu peluang (Oppurtunity) dan ancaman (Threat). Data premier dari online survey yang disebar melalui media sosial dan email diperoleh 42 responden dan diperoleh 25 sample responden, sedangkan  untuk data sekunder didapatkan dari jurnal ilmiah atau dokumen perusahaan. Hasil penelitian menunjukan bahwa Plaza Senayan memiliki kualitas  kenyaman pengunjung sangat tinggi, analisis TOWS menunjukan Plaza Senayan berada dalam kuadran I yang berarti Plaza Senayan memiliki kekuatan internal dan peluang lingkungan yang besar untuk mempertahankan statusnya sebagai pusat perbelanjaan premium yang tidak dapat dipengaruhi dengan persaingan pusat perbelanjaan yang baru dan lebih modern. Bentuk strategi yang sesuai untuk digunakan adalah strategi agresif untuk memaksimalkan kekuatan internal dan ekstenal.
Perbandingan Performa Model Data Mining untuk Prediksi Dropout Mahasiwa
Authors: Anwar Muchamad Taufiq , Permana Denny Rianditha Arief
Published: August 2021

Penentuan teknik/model data mining yang tepat pada sebuah kasus sangat penting untuk mendapatkan model yang baik (tingkat akurat tinggi dan kesesuaiannya dengan masalah yang dipecahkan). Penelitian ini bertujuan untuk membandingkan performa teknik data mining untuk diterapkan pada kasus prediksi dropout mahasiswa. Perbandingan performa dilakukan menggunakan library PyCaret pada Python untuk melakukan pemodelan menggunakan 14 model / teknik data mining yaitu: Extreme Gradient Boosting, Ada Boost Classifier, Light Gradient Boosting Machine, Random Forest Classifier, Gradient Boosting Classifier, Extra Trees Classifier, Decision Tree Classifier, K Neighbors Classifier, Naive Bayes, Ridge Classifier, Linear Discriminant Analysis, Logistic Regression, SVM - Linear Kernel, dan Quadratic Discriminant Analysis. Metrik evaluasi performa model yang digunakan yaitu Accuracy, AUC, Recall, Precision, F1, Kappa, dan MCC (Matthews correlation coefficient). Hasil eksperimen menunjukkan bahwa kasus prediksi dropout mahasiswa lebih tepat jika dimodelkan dengan model berbasis ensemble learner dan pohon keputusan dengan akurasi mencapai 99%. Pohon keputusan memiliki keunggulan dibandingkan model lain seperti SVM - Linear Kernel dan Quadratic Discriminant Analysis karena ia dapat dengan lebih detil dalam memisahkan data ke dalam kedua kelas target. Setelah dilakukan penyesuaian atribut, pembuangan data dengan missing values, dan parameter tuning, didapatkan hasil akurasi yang mirip dari berbagai model yaitu sebesar 87%. Perbedaan akurasi antar model menjadi sangat kecil di saat atribut data yang digunakan sedikit.
Is there a relationship between junior and senior tennis success?
Authors: Bane Michael , Elliott Bruce , Reid Macher
Published: August 2021

Imagine you’ve just won a Wimbledon Championship and reached the number one world ranking, all before the age of 18. It sounds pretty unlikely but it happens more often than you would think—in the international junior game, that is. But what does this type of success mean in relation to the professional game? Do elite juniors become elite pros? This article will provide some evidence on this issue by presenting the tennis specific research conducted during the last years.
Helping junior tennis players cope with their emotions
Authors: Knight Camilla , Lewis Francesca , Mellalieu Stephen
Published: August 2021

Competition is an integral component of junior tennis. Through competition children can test their physical prowess, develop their psychological skills and, ultimately, progress through the rankings. While some enjoy tournaments and excel when competing, others find it more challenging and experience emotions such as anxiety and pressure when they perform. For children to succeed in matches and reach their potential as tennis players, they must be able to cope with the range of emotions that arise before, during, and after matches. It is therefore important to understand the emotions that children experience when they compete and help them develop appropriate coping strategies to manage these emotions. This article provides recommendations for coaches regarding how they can help children to cope with the emotions they experience when competing.
Economie rurale non agricole, levier de réduction de la pauvreté dans le Bassin arachidier du Sénégal
Authors: TANDJIGORA Amadou , SY Thierno Bachir
Published: August 2021

Cet article analyse par des faits stylisés les activités non agricoles qui sont classifiées sous forme d’industries et de services ruraux. Une étude comparative sur le niveau de pauvreté entre les ménages agricoles et les ménages non agricoles a été faite. Les résultats ont ainsi montré que parmi les individus de l’échantillon qui se sont déclarés pauvres, 72% exerçaient l’agriculture et les métiers connexes comme principale activité et 28% exerçaient les activités non agricoles. Le ratio « pauvre/non pauvre » du secteur agricole évalué à 3,17 traduit toute la difficulté de l’agriculture bien qu’elle continue d’employer le maximum de ménages en zone rurale. Ce ratio est au même moment égal à 1,30 pour les industries rurales et 1,27 pour les services, ce qui signifie en outre que les pratiquants des industries et services ruraux sont moins sensibles à une insuffisance de ressources monétaires, comparé aux agriculteurs.
Culture, styles de management, GRH et performance des organisations marocaines : Revue de littérature
Authors: Omar RAJÂA
Published: August 2021

Cette revue de littérature nous a permis de mieux appréhender le contexte marocain pour pouvoir comprendre le rôle des pratiques RH dans la performance des organisations marocaines et d’exposer les principaux résultats des études effectuées dans ce sens.
PREPARATION OF CATALYST SUPPORT FROM BIO CARBON
Authors: CAVALLARI R. V. , DE LIMA N. B. , SILVA J. C. M. , BERGAMASHI V. S. , FERREIRA J. C.
Published: August 2021

The overuse of non-renewables resources in the last decades has generated negative consequences for the society, which have boosting the search for mitigating the damage caused in the environment. Aiming to contribute to the expansion of the strategies to control the pollutants in the environment thought the development of low-cost technologies, the mean goal of present work is to develop active materials with high thermic resistance and suitable specific area to adsorption and impregnation of metals. In this regard, it was studied three different routes of treatment of the biocarbons. The biocarbons materials were characterized by infrared spectroscopy (IR), Raman spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TG), and Brunauer–Emmett–Teller analysis (BET). The three different strategies of treatment resulted in changes in the carbonaceous structure of the biocarbon, resulting in suitable characteristics for support material for catalysts, such as activities sites with negative charge to promote the attachment of the metals on the carbon surface. It was also observed the enhancement of the specific surface area, that ranges from 341.4 to 749.7 m2 g-1, changes of D and G band of carbon and high temperature resistance, which promote catalytic reactions with catalyst loss.
THE EFFECTS OF ILLUMINATION ON THE EARLY DEVELOPMENT OF AMPHIBIANS (AMPHIBIA: ANURA AND CAUDATA)
Authors: RUCHIN A. B.
Published: August 2021

The effects of illumination on the early development of four amphibian species — Lissotriton vulgaris (Linnaeus, 1758), Triturus cristatus (Laurenti, 1768), Rana arvalis (Nilsson, 1842), and R. temporaria (Linnaeus, 1758) — have been studied. In general, the rate of their early development is rather independent of illumination. The eggs of tailless amphibians develop almost similarly under any illumination conditions, whereas the eggs of tailed amphibians better develop at an illumination of 700 lx. Illumination mainly influences the survival rate of embryos and prolarvae, which increases at low light intensities and decreases in the dark. Possible mechanisms and causes underlying the observed facts are discussed.
EVALUATION OF THE INFLUENCE OF THE TIDES ON THE PHYSICALCHEMICAL PARAMETERS PRESENT IN THE WATERS OF THE GUARAGUAÇU RIVER - PR
Authors: STASZCZAK I. , ROCHA J. R. C.
Published: August 2021

The GuaraguaçU River is an important Paranaense coastal ecosystem. As this water body approaches the mouth of the river, fresh water is gradually mixed with the salt water of the ocean by the action of the tidal cycle, thus characterizing the estuarine environment. In this study gravimetric tests were carried out to determine the concentration of total solids dissolved in the samples of said river. These values were compared with those of electrical conductivity and the salinity of the samples. Sixteen samples were collected in each of the two sampling periods, with the first period being high tide and the other with low tide. For the homogeneity of the results, the distance between the sampling points was 1100m, making the total of 18km. By evaluating the results obtained, one can notice that in the mixing of the waters three very distinct zones are formed: the first is the one in which there is predominance of continental water; the second is where the mixture of continental and oceanic waters occurs and the third is where there is predominance of oceanic water. In the second sampling zone, the increase in the values of the obtained results is clearly observed, the closer they are to the mouth of the river.
COSMETIC PRODUCTION FROM GLYCERINE THE BIODIESEL
Authors: PEREIRA B. R. , DE CARVALHO R. M. M. , CAETANO S. T.
Published: August 2021

The present study aims to produce a cosmetic emulsion containing the co-product glycerine, generated in the production of biodiesel by the transesterification of canola oil. The first part of the work consisted in the production of biodiesel by the transesterification of crude canola oil, using potassium hydroxide as catalyst, with a molar ratio of oil:methanol (1:6) and a temperature of 25 °C. The final reaction mixture had to be washed and filtered to obtain biodiesel, which was characterized and considered within the specifications of the National Oil Agency (ANP). The second step was based on the pre-purification of the glycerine by acid hydrolysis, by the addition of concentrated phosphoric acid/crude glycerin in the 2:3 molar ratio. This step was important to remove impurities such as the catalyst and fatty acids to later use the glycerine in the manipulation of the cream. Finally, the formulations of the Lanette® cream were made, one with the pharmaceutical glycerine other for the pre-purified glycerine of the biodiesel, and comparative tests were made among them, which proved the viability of the pre-purification of the residual glycerine of the biodiesel.
OVERVIEW OF GROUNDWATER MANAGEMENT IN THE STATE OF MARANHÃO
Authors: DIAS I. C. L.
Published: August 2021

The management of water resources is a relevant theme, not only for human supply but also for the structural development of a country. Given the contemporary scenario, about the availability of water in some regions of Brazil and in the world, we can say we are faced with a moment of water insecurity, which makes the groundwater a strategic reserve of supply. This study aimed to outline the current scenario of the management of groundwater resources and analyze its situation in the state of Maranhão. It was verified that after thirteen years of implementation of the Water Resources State Policy, only three of its eleven instruments are implemented: the Grant of Right to Use Water Resources, the State Register of Users of Water Resources, and the State Fund of Water Resources, which still have some fragilities. It can be said that the state of Maranhão has encountered difficulties in implementing the instruments of the water resources policy, constituting an obstacle to the management of groundwater; however, it can be verified significant advances that may contribute to the implementation of the other instruments.The strengthening of water resources management involves the consolidation of state infrastructure, greater empowerment of counties, the more effective participation of the federal government and society in the management of groundwater.
ANTIBACTERIAL AND ANTIFUNGAL POTENTIAL OF EXTRACTS OF Anacardium occidentale
Authors: ANDRADE JUNIOR F. P. de , ALVES T. W. B. , ROMANO T. K. F. , MEDEIROS F. D. de
Published: August 2021

Anacardium occidentale is a native plant from Brazilian Northeast popularly known as cashew tree, having great socioeconomic importance for this region, due to the great popularity of its fruit and its medicinal properties, the example antimicrobial activity. The present study had as objective to make a bibliographical survey about the antimicrobial activity of A. occidentale against strains of bacteria and fungi. We used the databases Scielo, PubMed, Lilacs and Periódicos Capes, in which 110 articles were analyzed and only 48 were selected. From the data obtained in the literature, it was observed that the bark of the stem, leaves, flowers and the own fruit of A. occidentale present antimicrobial activity against Gram-positive and Gram-negative bacteria and fungi of the genus Candida. Thus, A. occidentale presents as a potential species for the research and development of possible herbal medicines to combat bacterial and fungal infections.
NANO CERAMIC COATING APPLIED IN SURFACE TREATMENTS
Authors: DA MAIA B. I. , FUTAMI A. H. , DE OLIVEIRA M. A.
Published: August 2021

This paper presents practical results of comparison of corrosion resistance in products with application of nano ceramic sealant, the results are compared with products that have surface treatments of electrolytic galvanization, KLT and organometallic. The ceramic nano sealant consists of nano metric colloidal silica. The tests carried out followed the procedures established in the international standard ASTM B117 which assigns test standards to evaluate the corrosion of products. To perform the tests, samples were developed with the application of the nano ceramic sealant and samples that only passed through the process of electroplating, KTL and organometallic electroplating. All samples were submitted to the tests established by ASTM B117. The obtained results, express superior performance of corrosion resistance of the products that went through the process with nano ceramic finish.
FATTY ACID ESTERIFICATION: EFFECTS OF UNSATURATION AND SYNTHESIS WITH THERMAL HEATING VIA ULTRASON AND MICROWAVES
Authors: SOUZA M. C. de M. , DI SOUZA L. , Caldeira V. P. da S. , SANTOS A. G. D. , ADILSON B.
Published: August 2021

With the increasing selective energy demand, fossil fuels are becoming scarce and environmentally incorrect, a viable alternative to this problem being the production of biodiesel. However, the esterification and transesterification reactions used are slow, expensive and ecologically incorrect because they produce polluting waste. Thus, it is necessary to develop techniques, reagents and equipment that make them fast, cheap and environmentally friendly. This work evaluated the performance of the thermal heating, microwave and ultrasonic methods in the esterification efficiency of oleic and stearic fatty acids via homogeneous acid catalysis. The efficiency of the reaction was certificated with the variables: time, yield and conversion and the biodiesel characterization were done with TG / DTG, FTIR and NMR. Conversions were determined by TG and 1H NMR and the yield by gravimetry. The results showed conversion with all methods with differences in the analyzed variables. The yields decrease in the microwave order (52%) conduction (33%) ultrasound (30%) for reactions with oleic acid and are practically the same (22, 22 and 20), independently of the stearic acid. Among the methods used, the most efficient is the microwave, because it has a higher yield in the case of oleic acid and reducing the reaction time.
NALYTICAL PROCEDURES FOR DETERMINING METALS IN GASOLINE AFTER PRE-TREATMENT ACID
Authors: SILVA L. M. S. da , VIÉGAS D. S. S. , MARQUES E. P. , AZEVEDO L. C. M. de , MARQUES A. L. B.
Published: August 2021

The work presents a study through electroanalytical procedures for the determination of metals in gasoline samples. The determination of metals in fuel is an issue of environmental relevance because it believes that these elements can be released into the atmosphere causing damage to the environment and health. Also when present outside the established acceptable limit, the reactivity of these elements may directly imply the quality of the fuels. Thus, the use of low cost and efficient techniques such as electroanalytic are shown as a viable option for this purpose. The access to the metals by voltammetric techniques was only possible after the acid digestion of the samples and two digestion procedures were evaluated (Digestor Block and Microwaves) in different acid purities. The comparison between the two digestion systems (open and closed) using the same experimental conditions showed that the digestion in the closed system presented better results, due to the lower risk of contamination of the sample. The evaluated procedure presented satisfactory results from an analytical and statistical point of view and, therefore, it was considered adequate for the analyzed matrix.
GLYPHOSATE AND TURBIDITY REMOVAL IN WATER CONDITIONS BY CLARIFICATION WITH TANFLOC
Authors: SILVA J. T. B. , ROCHA K. C. , CUBA R. M. F.
Published: August 2021

With the progress in the agriculture sector, improper domains of pesticides, herbicides, and insecticides have grown, which have been negatively affected the environment until the present day. Therefore, the present work has as objective to evaluate the efficiency of the natural coagulant Tanfloc in the clarification stage with respect the herbicide glyphosate removal and the turbidity parameter by using jar test with different pH conditions and coagulant concentration. As a result, was obtained that for the pH range of 5-5.5 the natural coagulant has shown more efficient, with a glyphosate percentage removal of approximately 98.0% using low concentrations and turbidity removal of 21.69%. On the other hand, for the pH range of 6.8 to 7.3, the coagulant has not shown profitable results, considering that, for some concentrations, it was not possible to detect the herbicide removal. In the concentrations that were detected removal, the average glyphosate percentage removal was approximately 89% and an average of 20.24% of turbidity removal. In summary, although the natural coagulant has not shown remarkably efficient in the neutral pH range, the product may be considered an alternative device in water treatment with the respect of the use of metallic coagulants, which produce sludge with chemistry characteristics that may negatively affect the environment.
INDUCTION TECHNOLOGY IN HIGH-VISCOSITY OIL PRODUCTION AT TAZOVSKOYE FIELD
Authors: KONESEV S. G. , KHLYUPIN P. A. , GREB A. V. , KONDRATIEV E. Y.
Published: August 2021

The article addresses viscous and high-viscosity oil production methods that are also relevant to Tazovskoye oil-gas condensate field. Heat-affected zones have been identified to assure the most effective development of the viscous and high-viscosity oil field. Study and patent research results have been used to determine four most effective thermal methods of high-viscosity oil rheological properties con-trol: local heating, co-current heating, local stage heating, and local co-current heating. Existing thermal systems for the implementation of these thermal methods have been analyzed and electrothermal systems based on induction technology have been chosen. The efficiency of induction technology is due to a high range of the thermal flow formed and implementation of two modes: temperature maintenance and emergency heating. Local heating may be ensured by an induction downhole heater of the face area or an induction electric steam generator for the thermal action not only on the face area, but the entire producing formation. A heating device has been proposed based on results of the patent research of induction heating systems for high-viscosity oil. A versatile magnet-operated component has been proposed as a heating body of the induction heating system.
ANTI-HYPERTENSION DRUGS: ACTION IN THE ORGANISM AND ENVIRONMENTAL CONTAMINATION
Authors: DOSSA A. B. , SILVA Y. P. da
Published: August 2021

Systemic Arterial Hypertension is an ascending pathology that is being treated more and more through antihypertensive drugs. The most commonly used are: Enalapril, Captopril, Losartan, Propranolol, Atenolol, and in addition, Furosemide and Hydrochlorothiazide are prescribed and are used as a secondary medicine. The abusive use may lead to contamination of water resources due to urine excretion and improper disposal of these drugs after the expiration date. In addition to environmental awareness at the time of inadequate disposal, the main problem is in sewage treatment plants that do not have the necessary resources to control contamination, and many drugs are not yet identifiable by current methods. Some studies have already confirmed this contamination, but research is recent.
THEORETICAL JUSTIFICATION OF INFLUENCE OF GEOMETRICAL PARAMETERS OF A HYDROCYCLONE UPON THE DEGREE OF CLEANING OF THE USED OILS FROM THE INSOLUBLE IMPURITIES
Authors: KHOKHLOV A. L. , GLUSHCHENKO A. A. , SALAKHUTDINOV I. R. , PROSHKIN E. N. , MARIN D. M.
Published: August 2021

The immediacy of the problem under investigation is connected with the need for the development of the environmentally friendly technologies for cleaning of the used mineral oils from the insoluble impurities. The purpose of this article is to describe the theoretical investigation of the influence of the geometrical parameters of the cylindroconical hydrocyclone upon the degree of cleaning of the used high-viscosity mineral oils from the insoluble impurities and from the wear metal particles. The main approach to the investigation of this problem is as follows: analysis of the behavior of an insoluble particle in the stream of oil under the influence of the forces, which act upon the particle. Such analysis makes it possible to determine the geometrical and operating parameters of the cylindroconical hydrocyclone, which exert the greatest influence upon the degree of cleaning of oils. This article presents the theoretical justification of influence of the geometrical parameters of the cylindroconical hydrocyclone upon the degree of cleaning of the used oil. In addition, this article describes the separation criterion, which makes it possible to determine optimum dimensions of the hydrocyclone and perform a comparative assessment of the hydrocyclones with different geometrical parameters in respect of the efficiency of cleaning of oils from the insoluble impurities.
DESIGN DIAMOND SEMICONDUCTOR PRESSURE TRANSDUCER
Authors: AFANASYEV S. A. , AFANASYEV M. S. , FESHCHENKO V. S. , LVOV S. A. , ZHUKOV A. O.
Published: August 2021

Pressure sensors play an important role in measuring variables in the control and automation systems of various processes. The purpose of this article is to study the design of a diamond semiconductor pressure sensor. In order to achieve this goal, the analysis was based on the Fourier law, but the authors made changes in the model of equations. The study was carried out using diamonds, as they are one of the promising materials for the manufacture of sensors and have high strength, thermal and radiation resistance. It was established that the output current in a semiconductor converter of the same load on the membrane does not depend on the supply voltage, which corresponds to the technical requirements developed in the converter. When determining the insulation resistance between the sensor plates, it was determined that the insulation resistance is less than 200 MW that meets the technical requirements.
IMPROVEMENT OF THE TRANSESTERIFICATION PARAMETERS USING BLENDS: OIL CRUDE FISH OIL AND FRYING OIL
Authors: CHIRINOS H. D. , BARRA J. A. , CRUZ D. D. , HUALLPAMAYTA G. M.
Published: August 2021

To improve the parameters of the transesterification process by the basic route for the production of biodiesel, crude fish oil (AP), obtained from the viscera of fish, and residual vegetable oils (AR) blenders were used. Because the AP contains high percentages of long chain polyunsaturated fatty acids that are responsible for its instability is that it was mixed with increasing percentages of AR. This translated into a higher conversion performance to biodiesel by the basic route, also depending on the level of free fatty acids. The index of methyl esters obtained from the blends and the original oils was analyzed. The calculation of the performance of each reaction is made based on the produced esters. The analysis is complemented by measuring the kinematic viscosity of the blends and the pure oils, as well as the biodiesel produced. The results showed yields higher than 90% when using the process of transesterification of the blends by the basic route. The standardization of blends by its acidity index is of great importance reaching a maximum value of 3.5 mg KOH/g. On the other hand, the viscosity of the biodiesel produced, from the blends, is kept within international standards; In addition, the process conditions are improved.
FILTRATION MODEL OF OIL CONING IN A BOTTOM WATER-DRIVE RESERVOIR
Authors: YAKUPOV R. F. , MUKHAMETSHIN V. S. , TYNCHEROV K. T.
Published: August 2021

The purpose of the paper is the substantiation of the application of the oil coning technology in the process of the hydrodynamic simulation of the successive method, which includes the perforation of the casing below the level of oil-water contact; the drawing of water from the lower water-saturated part of the reservoir; the isolation of this perforation interval; the drilling-in of the near-caprock oil-saturated part of the reservoir and the production of near-caprock oil. The leading approach to the research of this problem is the method of filtration modeling of the oil and water coning processes in the reservoir. As a result of the study, a hydrodynamic model of a well has been created, which corresponds to the requirements of the visualization of the process, the authenticity and the possibility to control the necessary parameters of the model and to estimate the effectiveness of the technology.
OPTIMIZATION PROCESS PARAMETERS TO OBTAINED TWO-WAY CATALYST La2O3/Cu/Al
Authors: CHIRINOS COLLANTES H. D. , PEREZ ALARCON R. J.
Published: August 2021

The surface methodology of response to the factorial design was used to relate the catalytic activity in a two-way catalyst and the following process parameters: concentration ratio La2O3/Cu and La2O3/Al; matrix weight; impregnation time; the calcination temperature. The factors that influenced directly under the CO reduction efficiency were studied. The objective was to identify the process factors, which had the greatest effect, in the adition to evaluating the interaction between them. It was observed that there is an increase of 0.195%, on average of the CO reduction when the concentration ratio varies from 0.5g to 1.25g and there is an increase of 0.47%, on average, of the CO reduction when the impregnation time varies from 6h to 12h. It is also observed that the effect of the block is significant but negative, there is a significant decrease of 3,7%, in average, in the reduction of CO when using the ratio La2O3/Al confirming that the catalyst with the aluminum metal presents higher catalytic efficiency in CO reduction. It was also observed that there is an interaction between the immersion time and the calcination temperature and that it had a synergic effect. The linear correlation was determined by the following mathematical equation: yˆ = 2,41 + 0,04x1 + 0,18x2 − 0,218x3
RUSSIA-INDIA: INDIAN STUDENTS’ ADAPTATION IN RUSSIAN UNIVERSITIES IN THE CONTEXT OF THE DIALOGUE OF CIVILIZATIONS AND CULTURES
Authors: ABRAMOVA I. E. , AGEEVA N. A. , SHAPOVAL G. N. , LYSENKO K. N. , SAMOFALOVA M. V.
Published: August 2021

The article touches upon the perspectives for the development of a humanitarian and intercultural interaction between Russia and India on the example of Indian students’ social adaptation in Russian universities. The monitoring of students’ satisfaction conducted in 2011 and 2015 and the sociological survey on the adaptation problems of second and sixth year students of the Therapeutic Prophylactic Faculty at the Rostov State Medical University allowed revealing how students’ socialization and inculturation success depends on the effectiveness of international work at a Russian University. The authors of the research believe that it is possible to make the adaptation process easier and faster by creating the necessary conditions for the education and residence of students from different countries with a consideration of the historical and cultural heritage, as well as the national and religious characteristics of the individuals involved in the educational space.
SYNTHESIS OF 2- (2I – ACYLOXY-ETHOXY) ETHYL CHLORIDE AND THEIR INTERACTION WITH AMIDES AND ALKALI METAL RHODANIDES
Authors: ZHANALIYEVA R. N. , TORSYKBAYEVA B. B. , ALTYNBEKOVA M. O. , IMANGALIYEVA B. S. , NAZAROVA A. Zh.
Published: August 2021

This work is aimed at studying the reaction of nucleophilic substitution of the chlorine atom in 2-(2'-acyloxy-ethoxy) ethylchlorides with amines and a rhodanide ion and developing methods of synthesizing a 2-(2'-acyloxy-ethoxy) ethylchlorides, rhodanides, and their derivatives previously unknown in specialized literature. In the chlorohydrin molecule of diethylene glycol, there are two reaction centers that allow carrying out nucleophilic substitution reactions, as well as reactions that promote them with electrophilic reagents. The authors carried out several experiments for acylating diethylene glycol chlorohydrine with carbonic acids, reactions of nucleophilic substitution of the chlorine atom in 2-(2'-acyloxy-ethoxy) ethylchlorides with various amines as well as synthesized the chloracetoxyethyl ether of rhodane acetic acid. While studying the nucleophilic substitution of 2-(2'-acyloxy-ethoxy) ethylchlorides with the rhodanide ion, it was discovered that only the chlorine atom was replaced. The possibility of the nucleophilic substitution of the ethylene chlorohydrine was shown by the example of N-methyl and N-ethylanilines. It was discovered that the hydroxyl group of diethylene glycol could react with carbonic acids in the presences of catalysts and, therefore, encourage esterification. It has been found out that the nucleophilic substitution of the chlorine atom in 2-(2'-acyloxy-ethoxy) ethylchlorides with the rhodanide ion goes smoothly in the presence of potassium iodide acting as an activator and that the acyloxy group is unaffected. It has been discovered that the primary role in the nucleophilic substitution of alcoxyalkylhalides is played by the basicity of amines and the essence and position of substituents relative to the alcoxyl group of the haloid atom.
ULTRALOW COVERAGE SEQUENCING IS THE MOST ACCURATE LIBRARY QUANTIFICATION METHOD PRIOR TO EXOME SEQUENCING
Authors: KRASNENKO A. Y. , STETSENKO I. F. , RAKITKO A. S. , CHUROV A. V. , ILINSKII V. V.
Published: August 2021

Accurate DNA library quantification is very important in post-pooling captured exome sequencing. Underrepresented libraries will need additional sequencing, which takes extra time and money, whereas overexpressed DNA libraries can lead to the generation of more data than required, which leads to the waste of sequence capacity and a reduced number of samples per batch. There is a number of methods available to quantify DNA libraries prior to sequencings, such as UV absorption, use of intercalating dyes, capillary electrophoresis, 5’-hydrolysis probes (TaqMan©) coupled with quantitative PCR (qPCR) or droplet digital PCR. But there is no gold standard for the quantification of DNA libraries. This study compares common library quantification methods, including LabChip (PerkinElmer Inc., MA, USA), Qubit 3.0 (Thermo Fisher Scientific, MA, USA), several qPCR approaches, and ultralow coverage sequencing on Illumina MiSeq platform (with and without insert size correction). DNA libraries were prepared using the NEBNext Ultra DNA Library Prep Kit for Illumina (New England Biolabs, MA, USA). To compare the above-mentioned approaches, cost, time, and quantification accuracy were assessed in our study. Quantification methods involving the use of Qubit and MiSeq were found to be better than qPCR and LabChip approaches at predicting the final library concentration. It was also revealed that MiSeq with insert size correction was the most accurate method for library quantification prior to exome sequencing. This method allows for correction shifts in the ratio due to enrichment. Ultralow coverage sequencing on the Illumina MiSeq platform is the most accurate method of library quantification prior to pooling and post-pooling exome enrichment.
TOTAL PHENOLICS AND FLAVONOIDS DETERMINATION AND ANTIOXIDANT CAPACITY EVALUATION OF Poincianella bracteosa (FABACEAE) EXTRACTS
Authors: PASSOS Marcel Mark da Silva , FERNANDES Erica Porto , GUALBERTO Simone Andrade , SILVA Sandra Lúcia da Cunha , DA SILVA Débora Cardoso
Published: August 2021

Popularly known as “catingueira”, Poincianella Bracteosa is widely used by communities in the vicinity of the municipality of Tanhaçu, in Bahia to combat cough and bronchitis, therefore, based on data from a survey was performed ethnobotanical Phytochemical prospecting of the ethanolic extract obtained from aerial parts of poincianella Bracteosa, as well as the determination of antioxidant capacity and the levels of total phenolics and flavonoids present in the ethanolic extract and fractions. The study involved the obtaining of the ethanolic extract of the aerial parts of the species under study, by percolation with a 70% solution hidroetanólica. The fractionation of the ethanolic extract was performed with three different solvent (hexane, dichloromethane and ethyl acetate). The preliminary analysis of chemical composition was made by in vitro tests, with specific reagents for the different classes of secondary metabolites. The quantification of phenolics and total flavonoids was made by methods espectrofotométricos in the region of visible. The assessment of antioxidant capacity was performed by the method of kidnapping of free radicals DPPH and by method of reduction of iron ions (FRAP). The results of chemical prospecting demonstrated the presence of flavonoids, glycosides, gums and mucilage, heterosídeos antociânicos and condensed tannins in the ethanolic extract, being confirmed by quantification of total phenolics and total flavonoids. The ethanolic extract and the ethyl acetate fractions (SAF) and diclorometânica (FD) showed a strong antioxidant capacity, being that the SAF fraction was the most active, with EC50 of 3.07±0.05 μg.mL-1.The results show that the studied species is rich in phenolic compounds and has a strong antioxidant capacity, showing great potential for application as a natural antioxidant.
OPTIMAL LOCATION OF A PHOTOVOLTAIC SYSTEM TO IMPROVE THE VOLTAGE PROFILE CONSIDERING THE ACTIVE AND REACTIVE POWER LIMITATIONS
Authors: MALEKI HASAN ABADI H , DASHTI H
Published: August 2021

This paper has investigated the optimal localization of photovoltaic systems as one of the distributed generations in micro-grids, with regard to active and reactive power. Micro-grids provide the power quality in accordance with customers' needs, positive effects of micro-grids on the electricity market and economic savings. On the other hand, their effects on reducing air pollution have caused many researchers and experts to notice the issue of micro-grids. So, considering the ability of active and reactive power generation for photovoltaic systems in 24 hours, they can be used more efficiently. The algorithms presented on 33 bus micro-grid are applied in MATLAB, and the results have been investigated. The results have shown that the generated reactive power would significantly reduce the active power of system losses. At 9 AM, considering the PV inverter capability for generating the active and reactive power, voltage profile of the system has improved more effectively. At 12 PM, there are existed the maximum radiation and active power generated, and the whole capacity of the inverter is used to generate the active power. The PV reactive power generated has led to the improvement of the voltage profile.
PREPARATION OF BLENDING COMPOSITIONS BASED ON SECONDARY POLYPROPYLENE WITH CONTROLLED PHYSICO-MECHANICAL PROPERTIES
Authors: ZAKHAROV Vadim P , KHUSNULLIN Aigiz G , ZAKHAROVA Elena M , SHURSHINA Anzhela S , KULISH Elena I
Published: August 2021

It was investigated the effect of the method of obtaining polymer composites based on the blend of polymers over a wide range of their ratios on the rheological and physical-mechanical properties. The composites were prepared (using pressing or pressure die casting) on the basis of secondary polypropylene (PP) and the following polymers: 1) ultra high molecular polyethylene (UHMPE); 2) ethylene propylene diene monomer (EPDM); 3) secondary low pressure polyethylene (LPPE). Pressing was carried out on an automatic hydraulic press "AutoMH-NE" (Carver, the USA) at 210°C and endurance under pressure of 7000 kgfs within 3 min. Injection molding was performed using a Babyplast automatic molding machine of the horizontal type with an injection volume of up to 15 cm3. In both cases, the compositions also went through a stage of the preliminary mixture at the laboratory station (plastograf) of "PlastographEC" (Brabender, Germany) within 15 min at a load of 200 N. Estimation of rheological properties of the polymer composition melts was performed using a Haake Mars III rheometer. The deformation-strength properties were studied according to the State Standard GOST 11262-80 with a tensile testing machine "Shimadzu AGS-X". Using the data of relative rheometry, it is determined for all the systems studied (blends PP with UHMPE, EPDM, and LPPE) that variation of the maximum torque with composite composition is non-additive. This seems to be due to the occurring phase reversal. The present fact finds its support when performing rheological investigations using absolute rheometry. It is shown that variations in the phase structure of composites occurring in the phase reversal area lead to the corresponding changes in the deformation-strength properties of composites.
ULTRASONICATION OF CUCUMIS MELO VERSUS PERCOLATION: POLY PHENOL, TOTAL FLAVONOID, AND BETA–CAROTENE EXTRACT AS NATURAL DYES
Authors: Almahy Hassan Abdallah , Abdel-Razik Hamada Hamada , El-Badry Yaser Abdel-Moemen
Published: August 2021

Natural dyes are pronounced as an interesting alternative to fabricated dyes. Accordingly, the attractive demand to develop the extraction techniques of the best ingredients of solid and liquid for natural dyes colorants from fruits materials and their application in human life have been grown. Extraction is processed using solvents or using modern techniques like ultrasonication and microwave. Current extraction of natural colorant from Cucumis melo has been performed using percolate technique as a model extraction method as well as applying ultrasonication. In the ultrasonication technique, samples were extracted with methanol in an ultrasonic cleaning bath by indirect sonication to yield ultrasonic extracts. Determination of the structure of active ingredients was performed conducted by UV spectroscopy. The dye extracted from Cucumis melo of intense color was proven to be β-carotene, a successful increment by 12.5% yield has been reported for the ultrasonic extraction process. β-carotene as a cortenoid which has antioxidant properties is the major carotenoid in cantaloupe. According to its health benefits, the β-carotene content in fruits is of great interest to the food industry and to melon breeders. Moreover, the determination of total phenolic and total flavonoid contents for the percolation and ultrasonic extracts have been successfully attained. The total phenolic and flavonoid contents of the extracts were determined using the Folin–Ciocalteu and aluminum chloride method, respectively. the percolation extraction method had 176.0 mg.g-1 as the least total phenolic contents compared to ultrasonic extraction method (183.2 mg∙g-1). The total flavonoid content of Cucumis melo flesh was varied from 59.6, and 71.4 mg CE g-1 possessed by percolation and ultrasonic extracts, respectively.
VEGETABLE OILS DEGRADING CAPACITY BY BACILLUS SUBTILIS AND PHYSICOCHEMICAL CHARACTERIZATION OF WASTE FRYING OILS
Authors: DE SOUZA Eliane Ferreira , SANTOS Maria do Socorro Mascarenhas , SILVA Cinthia Aparecida de Andrade , FIORUCCI Antonio Rogério , BATISTOTE Margareth
Published: August 2021

Vegetable oils are considered important energy sources that provide essential fatty acids and vitamins indispensable for maintaining the physiological balance of the human body, besides emphasizing sensorial characteristics of foods such as texture, aroma and taste. The oxidation process that occurs in oils, fats and fatty foods is one of the main causes of deterioration of food causing the loss of organoleptic quality and the reduction of the nutritional properties. This process may be associated with heating, as occurs in the frying process, the presence of microorganisms, among other factors. The study aimed to analyze two samples of waste frying oils (WFO) by determination of physico-chemical and microbiological parameters. The methods used were Rancimat test, potentiometric titration, chromatography and UV-vis spectrophotometry. The results showed high acid value (1.77 and 1.17 mg KOH g-1) and low oxidative stability (OSI of 1.93 and 0.79 h). The iodine value found (95.81 and 106.21 g I2 100 g-1) is below the suggested by the Codex standard. The fatty acid composition indicated that the acids in greater amount in both samples were the oleic acid C18:1 and linoleic acid C18:2. Sample 1 showed 23.64% and 76.58% of saturated and unsaturated fatty acids, respectively, while sample 2 showed 18.38% of saturated and 81.51% of unsaturated fatty acids. Bacillus subtilis was isolated in samples of WFO, and its degrating capacity was proved for soybean and sunflower oils.
CONSTRUCTING A SIMPLE DISTILLATION APPARATUS FROM USED GOODS BY USING PROJECT-BASED LEARNING
Authors: FADIAWATI Noor , DIAWATI Chansyanah
Published: August 2021

Students had been challenged to build a simple distillation apparatus by using project-based learning. In these project of the apparatus, they were applied their knowledges and skills to look for an alternative replacement tools, plan, build, and test the functioning of the apparatus. A simple distillation apparatus was designed and constructed by students where some tools could be replaced with used goods, such as: (1) a bunsen burner could be replaced with an spirit-wall lamp; (2) a soft drink glass bottle replaces a Pyrex flask as a distilling flask; (3) a modified plastic bottle with alumunium tube and plastic hoses replaces a glass tubing as a condenser, and (4) a modified dynamo from car toys was used as aerator with source of electric current from battery, power bank, or electric using phone charger. The apparatus already could be used to purify sea water that modeled by saline solution. The distillates were clearer and colorless compared to saline solution and did not conduct electricity. Based on that, the project was improved students’ understanding and creative thinking skills on the distillation concepts.
TOTAL PHENOL AND ANTIOXIDANT POTENTIAL OF FIVE SPECIES OF LAMIACEAE FAMILY
Authors: ARAÚJO Sthéfane Guimarães , AMADO Paula Avelar , PINTO Maria Eduarda Amaral , CASTRO Ana Hortência Fonsêca , LIMA Luciana Alves Rodrigues dos Santos
Published: August 2021

Lamiaceae family has a cosmopolitan distribution, including about 300 genus and 7500 species. Numerous diseases have been related to free radicals overproduction. Antioxidant capacity is related to compounds capable of protecting a biological system against the potentially harmful effect of processes or reactions involving reactive oxygen and nitrogen species. In the present study, the ethanol extracts, obtained by maceration of Melissa officinalis, Mentha sp., Ocimum basilicum, Plectranthus barbatus, and Rosmarinus officinalis were evaluated for antioxidant activity, the total phenolic content was determined, and volatile compounds were identified by Gas Chromatography coupled to Mass Spectrometry (GC-MS). Ethanol extracts of M officinalis, Mentha sp., P. barbatus, and R. officinalis were able to reduce the free radical DPPH with IC50 of 3.81, 11.89, 6.92 and 11.54 μg/ml respectively, presenting better activity than the BHT, used as a standard. However, the ethanol extract of O. basilicum showed low activity and high IC50 value. Total phenols of all extracts ranged from 85.18 to 212.74 μg/ml. The highest phenolic concentration was observed in the ethanol extract of M. officinalis. Analysis of volatile compounds showed the presence of phytol in all extracts, being predominant in P. barbatus and R. officinalis, and also nonadecane and heptadecane in M. officinalis. Fractions obtained from the five species of Lamiaceae also presented antioxidant effect. In the most active fractions were mainly phenolic compounds, such as flavonoids, tannins, and coumarins. These results encourage new studies with these species in order to isolate the compounds responsible for this antioxidant activity so that in the future they can be used as natural antioxidants.