bluuebunny/crossref_metadata_2025 huggingface dataset:
Phytochemical and High-Performance Liquid Chromatography Analysis of Extract of Vernonia cinerea
Authors: Acharya Ruchi , Sharma Bhawna , Singh Ruchi , Jain Prabhat
Published: January 2019

The present study aims to screen and quantify hydroalcoholic extract for phytochemical content and HPLC profiles for standardization. HPLC was carried out using a RP-C18 analytical column with a mobile phase composed of acetonitrile: methanol (50:50 v/v) and was isocratically eluted at a flow rate of 1 mL min-1. A small sample volume of 20 μL was used for each sample run, being injected into the HPLC system. The chromatogram was monitored with UV detection at a wavelength of 256 nm. Phytochemical screening of the extract showed the presence of flavonoids, amino acids, carbohydrates and protiens in hydroalcoholic extract. Quantification of total flavonoids showed that hydroalcoholic extract of Vernonia cinerea had flavonoid content 0.547 mg/100mg equivalent to quercetin. The data presented here could be used for the standardization of hydroalcoholic extract of Vernonia cinerea, either for future studies or in herbal drug formulations.

Keywords: Vernonia cinerea, HPLC profiling, Phytochemical analysis, Hydroalcoholic extract.
Formulation and characterization of acyclovir based topical microemulsions by QBD approach
Authors: Dev Asish , Dwivedi Jayesh , Momin Munira
Published: January 2019

Objective: The proposed study is focussed at developing acyclovir microemulsions for topical drug delivery systems.  QbD was applied for better understanding of the process and to generate design space, using quality target product profile, critical quality attributes, and risk assessment. The aim of the experiment is to prepare a safe, efficacious, stable and patient compliant microemulsion dosage form of Acyclovir. Materials and methods: Pre-formulation studies were carried out which helped in developing a suitable dosage form. UV, FTIR and DSC studies were done for pre-formulation and post-formulation evaluations. QbD was applied to generate design space, using QTPP, CQA, and risk assessment. Microemulsions of acyclovir were developed by using 32 factorial designs. Pseudo terneary phase diagrams were constructed to screen various surfactants and co-surfactants for the preparation of microemulsions. Two independent variables Oil Concentration (X1) and Smix Concentration (X2) at three levels low, medium and high were selected and response surface plots were generated. The microemulsions were prepared by plotting pseudo terneary phase diagrams. Various characterizations that were carried out include % transmittance, Viscosity and % drug release. Statistical analyses of batches and surface response studies were done to understand the effect of various independent variables on the dependent variables. Results and Discussions: The λmax was confirmed at 251 nm by UV spectroscopy. The melting point was determined experimentally to be 2460C which confirms the drug to be Acyclovir. FTIR and DSC studies confirmed that the drug is Acyclovir.  Conclusion: The study indicates that microemulsions of Acyclovir by QbD approach were successfully developed.

Keywords: Microemulsion, Acyclovir, DoE, QbD
Formulation and evaluation of chitosan films containing sparfloxacin for the treatment of periodontitis
Authors: Naik Santoshi , Raikar Prasiddhi , Ahmed Mohammed Gulzar
Published: January 2019

In the present study an attempt has been made to formulate and evaluate a sustained release periodontal film of Sparfloxacin with biodegradable, cost effective polymer Chitosan. The objective of the study was to formulate intra-pocket periodontal films, which could be easily placed into the periodontal pocket, and thus be capable of delivering therapeutic concentrations of drug. Sparfloxacin is an antibiotic, showing wide spectrum antibacterial activity against a number of periodontal pathogens. Hence Sparfloxacin is selected as model for site specific delivery, i.e., into periodontal pocket for the treatment of periodontitis. In the present investigation Chitosan films containing Sparfloxacin were prepared by solution casting method using acetic acid. The copolymers HPMC K4M, Sodium CMC and Eudragit RL 100 in the concentrations of 10%, 20% and 30% w/w of Chitosan were added into the polymeric solution. Propylene glycol was used as plasticizer. FT-IR and UV spectroscopic methods revealed no interaction between Sparfloxacin and polymers. The drug loaded films were evaluated for their thickness, weight variation, content uniformity, tensile strength, percent elongation, percentage moisture loss, surface pH, folding endurance, in- vitro drug release studies, in - vitro antibacterial activity and stability studies. Periodontal films showed initial burst release of drug on 1st day and then the release was sustained for a period of 8 days. In – vitro antibacterial activity was carried out on staphylococcus aureus and the antibacterial activity was retained for 96 hours. In - vitro release from periodontal films was fit to kinetic models to reveal drug release kinetics.

Keywords: Periodontitis, Sparfloxacin, Bio-adhesive polymers.
Simultaneous estimation of telmisartan and atorvastatin calcium in API and tablet dosage form
Authors: JAGIRAPU BANGARUTHALLI , Harini U , Divya M , Sushma P
Published: January 2019

A new method has been established for the simultaneous estimation of Telmisartan and Atorvastatin calcium by RP-HPLC method. The chromatographic conditions were successfully developed for the separation of Telmisartan and Atorvastatin calcium by using boston ODS C18 column, flow rate was 1.0ml/min, mobile Phase consists of methanol:Acetonitrile:buffer in ratio of 35:25:40. Detection wave length was 235nm.The instrument used was SHIMADZU HPLC auto sampler. The retention time of Atorvastatin calcium and Telmisartan was found to be 2.350 and 3.490 minutes respectively. The analytical method was validated according to ICH guidelines (ICH Q2b). The correlation coefficient (r2) was found to be 0.997 and 0.999 for Telmisartan and Atorvastatin calcium respectively. % mean recovery was found to be 100.943% and 100.576% for Telmisartan and Atorvastatin calcium respectively. %RSD for precision on replicate injection was 0.46 and 0.70 for Telmisartan and Atorvastatin calcium respectively. The validation study was found to be precise, robust, and repeatable.

Keywords: Telmisartan, Atorvastatin calcium, ICH guidelines, Validation.
Evaluation of anti-microbial and anti-haemolytic activity of edible basidiomycetes mushroom fungi
Authors: R Madhanraj , K Ravikumar , MR Maya , Illuri Ramanaiah , K Venkatakrishna , K Rameshkumar , V Veeramanikandan , M Eyini , Paulraj Balaji
Published: January 2019

Mushrooms are used for a variety of biotechnological applications, particularly for the production of food, enzymes, dietary supplements, pharmaceutical compounds, feed supplements. Basidiomycetes mushroom fungi have been known for their nutritional values they can be considered as functional foods which can provide health benefits beyond the traditional nutrients. Mushroom represents a major and untapped source of potent new pharmaceutical products. A wide range of activities including antitumour, cardiovascular and antimicrobial are reported in mushrooms. In developing countries like India mushroom progress is a boon in the field of food, medicine, and in generating employment. The alternative systems of medicine utilize the curative properties of mushrooms. They are also known to possess promising antioxidative, cardiovascular, hypercholesterolemia, antimicrobial, hepato-protective and anticancer effects. The present study aimed to evaluate antimicrobial and antihaemolytic activities of various extracts of Basidiomycetes mushroom fungi. Different Basidiomycetes mushroom fungi extracts (Hot water, Acetone and Hexane) were tested for antimicrobial and antihaemolytic activities. Among these different extracts of Basidiomycetes mushroom fungi the hexane extract of Pleurotus pulmonarius showed potential antimicrobial and antihaemolytic activity. The results of this study suggest the possibility of using Basidiomycetes mushroom fungi as natural sources for the pharmaceutical industry and could act as safe and cost-effective with potential biological activities. These findings encourage studying these fungal strains further for their potential biological applications.
Fast dissolving tablets: waterless patient compliance dosage forms
Authors: RADA SANTOSH KUMAR , Kumari Annu
Published: January 2019

Drug delivery by the oral route is the most prescribable and acceptable route in terms of patient’s compliance. Improvement of patient’s compliance has always a challenge towards the development of oral drug delivery system. In the market different types of oral dosage forms are available in which tablets, capsules, syrups, suspensions are preferred ones. Oral solid drug delivery faces drawback in case of swallowing especially with paediatrics and geriatric psychotic patients. Therefore scientists attracted towards fast mouth dissolving drug delivery systems to encounter existing problems with unique property of palatability and rapid disintegration. The concept of fast dissolving tablet came into existence in late 1970 and further improvements are still going on in connection with its preparation and methodology. Fast dissolving tablets have faster disintegration and dissolution rate and releases within 30 seconds as they come in contact with saliva. These systems also obviate the requirement of carry water during drug administration. This facilitate drug delivery to the patients of dysphasic, psychic, paediatrics, geriatric and bed-ridden, unconscious population. As fast dissolving tablets falls under desired expectation of safer, convenient and economical solid dosage forms, several techniques have been developed to improve disintegration quality in the recent past years. This article mainly focuses on formulation and evaluation technologies with recent advancement made so far in the field of fast dissolving tablets.

Keywords: Fast disintegration; Dysphasia; Mouth dissolving; Self-medication.
High-resistive nickel-based alloys for thermo-stable microwires manufactured by high-speed melt quenching
Authors: Vasilieva O. V. , Kuznetsov P. A. , Farmakovsky B. V.
Published: January 2019

The paper presents results of a development study of optimal alloy composition based on Ni–Cr–Si–B system for the casting of microwires in glass insulation by high-speed quenching. High-resistant microwires manufactured for the developed alloy have low temperature coefficient of resistance (less than 5 10–6K–1) and high linear resistance (more than 1000 kOhm/m) in a wide range of positive and negative temperatures (from –196 to 250°C).
Studying influence of technological parameters of cold gas dynamic spraying on the wear resistence of aluminum – carbon nanofibers coatings
Authors: Skvortsova A. N. , Tolochko O. V. , Bobkova T. I. , Vasilyeva E. A. , Staritsyn M. V.
Published: January 2019

Microhardness, coefficient of friction, modulus of elasticity, elastic recovery coefficients and plastic deformation resistance of functional coatings are determined. To study the wear resistance of coatings, tests were carried out for the intensity of wear with abrasive action. Experimental values of wear intensity of functional coatings are obtained, which allows predicting their service life. Mechanical and wear-resistant characteristics were thoroughly studied and coatings with highest properties were determined.
Radiotechnical hot pressed glass fiber plastics for ship aerial fairings and antennas protection in radio connection and radio location systems
Authors: Bakhareva V. E. , Nikitina I. V. , Churikova A. A.
Published: January 2019

The article is devoted to the urgent scientific problem of creation and introduction in shipbuilding of high-strength, water-resistant dielectric glass-reinforced hot pressed plastics on the basis of bi- and polyfunctional epoxy-amine binders and glass fabrics from alkali, quartz and silica glass.
Some aspects in studying corrosion of 25Kh1MF (25Cr1MoW) steel fasteners after aluminizing
Authors: Olenin M. I. , Gorynin V. I. , Berezhko B. I. , Khovratovich I. M. , Ptashnik A. V.
Published: January 2019

The resistance to atmospheric corrosion of 25Kh1MF (25Cr1MoW) steel after aluminizing and thermal improvement has been studied. It is established that the reduced resistance of the aluminized layer to atmospheric corrosion is caused by surface defects such as cracks or pores or by absence of a layer containing the intermetallide Fe3Al. In the aluminized layer containing aluminum-doped ferrite, aluminum nitrides have been found that prevent cold diffusion welding of fasteners’ thread surfaces.
Zirconium alloys with low melting points
Authors: Savchenko A. M. , Konovalov Yu. V. , Laushkin A. V. , Kulakov G. V.
Published: January 2019

A novel class of low-melting Zr-based alloys has been developed. They are deep triple and quadruple eutectics with very low melting points from 690 to860°C. Low-melting Zr-based alloys proposed as a matrix material for fuel elements with dispersed high-U fuel. Proposed fuel compositions have been developed with high thermal conductivity and U content (25–50% higher than in case of VVER and PWR fuel rods). As applied to PWR and BWR reactors, they have some advantages compared to conventional uranium dioxide fuel pellets. The use of new dispersion fuel can improve neutron-physical characteristics of the reactors, increase burn-out, reduce fuel temperature and improve fuel efficiency.
On the prospects of application of nanostructured heterophase polyfunctional composite materials inengine building industry
Authors: Silchenko O. B. , Siluyanova M. V. , Nizovtsev V. Е. , Klimov D. A. , Kornilov A. A.
Published: January 2019

The paper gives a brief review of properties and applications of developed extra-hard nanostructured composite materials and coatings based on them. The presentresearch suggestsaerospace applications of nanostructured composite materials based on carbides, carbonitrides and diboridesof transition and refractory metals. To improve the technical and economic performance of gas turbine engines, it is advisable to use new composite structural materials whose basic physicomechanical properties are several times superior to traditional ones. The greatest progress in developing new composites should be expected in the area of materials created on the basis of polymer, metal, intermetallic and ceramic matrices. Currently components and assemblies of gas turbine engines and multiple lighting power units with long operation life and durability will vigorously develop. Next-generation composites are studied in all developed countries, primarily in the United States and Japan.
Developing technology of fabrication of functional nanostructured coatings on wear- and corrosion-resistant alloy based on the Cu–Ni system
Authors: Makarov A. M. , Kosulnikova A. V. , Bobkova T. I. , Vasiliev A. F. , Geraschenkov D. A. , Klimov V. N. , Samodelkin E. A. , Farmakovsky B. V.
Published: January 2019

The paper presents complex studies of nanostructured powder of Cu-Hf-BN alloy system and functional wear and corrosion-resistant coatings based on It are presented. A technology for applying a composite nanostructured coating of the Cu-Ni-Zr-Cr-Hf-BN system onto a steel substrate (steel Kh18Yu5S) was developed using supersonic cold and microplasma deposition techniques. The coatings have elevated level of microhardness (up to 32 GPa), adhesive strength (more than13 MPa), resistance to stress-corrosion crackingand a wide range of operating temperatures from 850 to –196°C.
Main directions for research on the development of tribotechnical composites used in the Arctic regions (On the experience of North-Eastern Federal University in Yakutsk)
Authors: Okhlopkova A. A. , Sleptsova S. A. , Nikiforova P. G. , Struchkova T. S. , Okhlopkova T. A. , Ivanova Z. S.
Published: January 2019

Material science studies the relationship between materials structure and properties and its changes under external influence, and belongs to the priority domains of science and technology. The creation of new materials and also its performance improvement, efficient technologies for their processing is the main goal of material science. Today a substantial number of new metal alloys with special properties, different composites, ceramics, polymers, nanostructured functional powder and synthetic superhard materials, multifunctional coatings, etc. have been designed for various economic activities. But the creation of materials and technologies remains an urgent need, because of the progressive development of manufacturing which requires adaptive materials properties and technologies for their processing. This review analyzesAmmosovNorth-EasternFederalUniversity research directions in the field of tribotechnical materials for use in the Arctic regions. Main areas of research are identified, such as developing of polymer composite materials (PCM) production and improving their performance properties. The prospects of physical processing and chemical modification of the polymer matrix surface are shown. Physicomechanical and tribotechnical properties of antifrictional PCM are discussed. The results of the main theoretical generalizations in the field of analysis of PСM supramolecular structures are presented: 1) effects of critical filler concentrations on the structure and properties of PCM; 2) hypothesis of the nature of intermolecular interaction between the filler and the polymer. The modern tendencies of scientific investigation are shown, namely tribooxidative processes in PCM. The specific development of scientific knowledge and the use of polymers for the northern regions are revealed.
Aramid fiber reinforced plastic for composite marine constructions exploited in sea water
Authors: Tryasunov V. S. , Galaktionov M. S. , Shultceva E. L. , Baganik A. M.
Published: January 2019

The article considers the results of investigation fiber reinforced plastic for middle layer of ship’s constructions exploited in sea water. Mechanical properties of material were investigated to justificate the right choice of basic materials, construction structure and manufacturing process.
Influence of copper content on wear behavior of composites “steel ShKh15/copper” at sliding against copper under electric current of contact density higher than 100 A/cm2
Authors: Aleutdinova M. I. , Fadin V. V.
Published: January 2019

Powder composites “steel ShKh15/copper” in alumina ceramics and graphite powders surrounding were sintered in the air. Powder steel was restored from grinding slime of bearings production. It is shown that the steel framework has low level of mechanical properties, but high pore space percolation. Copper concentration increases isolated pores concentration impeding oil impregnation. This effect did not allow making the long and steady sliding electric contact with contact current density higher than 150 A/cm2. The sintered composites based on recycled bearing steel and containing near 15%Cu show high wear resistance at sliding with a contact current density 150–200 A/cm2 under boundary lubrication.
Obtaining the functional intermetallic Ni–Ti coatings by heterophase transfer combined with laser treatment
Authors: Geraschenkov D. A. , Makarov A. M. , Geraschenkova E. Yu. , Vasiliev A. F.
Published: January 2019

The results of the investigation of the intermetallic Ni–Ti system coating obtained by complex method of cold gasodynamic spraying and laser treatment are presented. The dependence of the coating charge composition on the initial powder composition is shown. Its structure, porosity, and microhardness are studied, and also the results of X-ray phase analysis confirming the presence of intermetallic phase are presented. The microhardness increased more than 5 times to 632 HV, and porosity decreased 25 times up to 0.2%. Investigation of the substrate-coating boundary showed the presence of mutual diffusion.
Experimental producing of Cu–Cr–N composite alloys and thermodynamic modeling of their phase composition
Authors: Melchakov S. Yu. , Bodrova L. E. , Goyda E. Yu. , Shubin A. B. , Somov P. A.
Published: January 2019

Composite Cu–Cr–N alloys were obtained in situ under vibration of “copper melt – chromium powder” compositions before their crystallization. Two types of alloys were prepared, where chromium powder was freely dispersed or compacted into a tablet. Atmospheric nitrogen was used as a source of chromium nitrides in the alloys. The microstructure of the alloys is represented by a copper matrix hardened with chromium particles and numerous inclusions of non-stoichiometric chromium nitrides Cr2N1–x. Thermodynamic modeling showed that the composition and quantities of chromium nitrides in the Cu–Cr–N alloy depend on the partial pressure of nitrogen above the melt.
The influence of oxidized technical carbon N121 on the properties of butyl-based rubbers
Authors: Nagornaya M. N. , Myshliavtsev A. V. , Khodakova S. Ya.
Published: January 2019

The subject of the study were samples of channel technical carbon K354, furnace technical carbon N121 and experimental – based on TUN121, oxidized with active forms of oxygen. Samples of carbon black were studied in the composition of a rubber mixture based on BK 1675N butyl rubber. The purpose of this study was to determine the possibility of using oxidized technical carbon N121 in fillers of rubber based on butyl rubber, instead of carbon black K354. The physicochemical properties of the samples of technical carbon under study, the results of physical and mechanical tests, and the gas permeability tests of rubber mixtures filled with the samples under study are presented. A conclusion is made about the possibility of replacing channel technical carbon K354 with furnace black carbon N121 oxidized with 30% hydrogen peroxide.
Dynamic properties of elastomer composites filled with multiwalled carbon nanotubes
Authors: Mitryaeva N. S. , Myshlyavtsev A. V. , Strizhak E. A.
Published: January 2019

The paper studies the influence of multiwalled carbon nanotubes (MWCN) on vulcanizing and dynamic properties under shear and oscillating load. It was found that, despite the lack of preliminary preparation of MWCN, when their concentration increase the dynamic properties also increase under an oscillating load in highly elastic state. Thus, it is possible to use MWCN producing elastomer materials with improved properties.
Heat-resistant antifriction carbon plastics for pumps sliding bearings of ship energy stations, thermal and nuclear power plants
Authors: Bakhareva V. E. , Bogun V. S. , Lishevitch I. V. , Nikitina I. V. , Sargsyan A. S.
Published: January 2019

The paper summarizes experience of development and application of high speed sliding bearings for centrifugal pumps of ship energy units, thermal electric stations, nuclear power plants. Sliding bearings work with overheated water at temperatures 200° Сand sliding velocities 20–40 m/s. Unlike metals, these sliding bearings don’t need additional oil lubrication. Two antifriction carbon plastics, namely phenolic type FUT-B and new one polyphenylene sulfide type UPFS are discussed.
Degradation of fuel rods materials based on zirconium after operation in WWER-type reactors
Authors: Gurovich B. A. , Frolov A. S. , Kuleshova E. A. , Maltsev D. A. , Safonov D. V. , Kochkin V. N. , Alexeeva E. V. , Stepanov N. V.
Published: January 2019

The paper presents microstructural studies of specimens cut from fuel elements made of E110 spongy zirconium-based alloy after operation in WWER-1000 before reaching the burnout of ~35 MW per day/kg U. As a result of exposure to high temperatures and neutron irradiation significant changes in the phase composition of the material of fuel rods claddings appear in particles β-Nb’ size, density, and composition; composition of the Laves phase, formation of dislocation loops of α-type, as well as δ and γ hydrides. The main structural elements determining the degradation of the mechanical properties of the E110 alloy under irradiation are dislocation loops and fine-phase precipitates due to their relatively large density. The data obtained can be used to construct dose dependences of microstructural changes with the aim of predicting the residual life of claddings and fuel assemblies as a whole.
X-ray non-destructive testing – an essential tool during modern aeronautics material technology design and development
Authors: Ospennikova O. G. , Kosarina E. I. , Krupnina O. A.
Published: January 2019

The X-ray non-destructive testing process is carried out by the system, which includes: the object of control (OC); source of radiation; detector; operator. The X-ray radiation and the object of control interaction formed the radiation image as X-ray doze distribution in accordance with the properties of the OC. At this stage, useful information about the OK is formed, which one is partially lost, partially distorted, and veiled with noise when the radiation image is converted into an optical one. The optical image is analyzed by operator, and the result of the control depends from his physical and emotional state.

This article presents a phased analysis of the entire radiation monitoring system. The first stage is the radiation image formation. Theoretical estimate of X-ray inspection system minimum detected defect size was made using space frequency spectrum analysis. The second stage is the transformation of the radiation image into an optical one. We represented the simulation of this process and obtained a modulation of how the operator sees the X-ray optical image and makes a decision about the OC state. Analyzed the X-ray digital image formation and determined the energy choice criteria when applied digital radiography.
Factors of strength increasing of metals produced by selective laser melting of powders
Authors: Barakhtin B. K. , Zhukov A. S. , Bobyr V. V. , Shakirov I. V. , Kuznetsov P. A.
Published: January 2019

Standard samples of metal powders of various chemical composition were made for mechanical tests by selective laser melting. The paper describes an increase in strength characteristics of all samples made by melting comparing with similar parameters of monolithic samples of identical chemical composition. It is established that ultrafine-grained structure and condensation of nanoparticles could be cosidered factors of strength increase.
Synthesis and electron beam facing of TiB – TiC – titanium matrix hybrid composite powders
Authors: Pribytkov G. A. , Korzhova V. V. , Krinitsyn M. G. , Firsina I. A.
Published: January 2019

TiB – TiC – titanium matrix composite powders have been synthesized by self-propagating high temperature synthesis (SHS) in titanium, boron and carbon reactive powder mixtures. A target volume content of the titanium matrix (binder) in the powders was 50%. The SHS powders were cladded on VT1-0 titanium sheet by electron beam facing. A thickness of the cladded coatings varied from 1 to 3 mm depending on the pass number. A phase composition and a structure of the SHS powders and of the cladded coatings were invetigated be X-ray diffraction, optical and scanning electron microscopy. According to structure investigation and hardness profiles in the “coating – titanium base plate” transition zone an adhesion of the coating to the base is high. The hardness and abrasive wear resistance tests of the cladded coatings were carried out depending on the powder used for cladding. The maximum hardness increase of the coatings strengthened by titanium monoboride and titanium carbide inclusions is 2.2 times and abrasive wear resistance – 4.3 times as compared with VТ1-0 base. According to authors’ earlier results enhance hardness and abrasive wear resistant effects of titanium matrix by titanium carbide particles and titanium monoboride is near to the wear resistance of coatings deposited with SHS TiB + Ti powder, but ~5 times less than the wear resistance of coatings surfaced with SHS powder TiC + Ti.
Modeling of steel hardening process at thermal and mechanical treatment
Authors: Oryshchenko A. S. , Malyshevsky V. A. , Shumilov E. A.
Published: January 2019

The article deals with modeling of thermomechanical processing of high-strength steels at the Gleeble 3800 research complex, simulating thermomechanical processing with various temperature and deformation parameters of rolling and with accelerated cooling to a predetermined temperature. The identity of steel hardening processes at the Gleeble 3800 complex and specialized rolling mills, as well as the possibility of obtaining steels of unified chemical composition, are shown.
Applying Nickel-Cobalt diffusion coatings from dump converter slag
Authors: Veselovsky A. A.
Published: January 2019

The application of stale and newly formed dump converter slags as raw materials for the creation of diffusion protective Nickel-Cobalt coatings is considered. The possibilities of chlorination of Nickel-containing phases, the chemical composition and diffusion parameters of the process are investigated.
Scientific and technological bases for creation of cold-resistant steel with a guaranteed yield strength of 315–750 MPa for the Arctic. Part 2. Technology of production, structure and properties of sheet hire performance
Authors: Sych O. V.
Published: January 2019

On the basis of the conducted research, a complex of scientific and technological methods has been developed for various technological processes (thermomechanical processing with accelerated cooling, quenching from rolling and separate furnace heating with high-temperature tempering). The developed method provides the formation of the structure of acceptable heterogeneity and anisotropy according to different morphological and crystallographic parameters throughout the thickness of rolled products up to 100 mm from low alloy steels with a yield strength of at least 315–460 MPa and up to 60 mm from economically alloyed steels with a yield strength of at least 500–750 MPa. The paper presents results of the industrial implementation of hot plastic deformation and heat treatment schemes for the production of cold rolled steel sheet with yield strength of at least 315–750 MPa for the Arctic. The structure of sheet metal thickness is given, providing guaranteed characteristics of strength, ductility, cold resistance, weldability and crack resistance.
Thermal characteristics and physical and mechanical properties of aromatic polyamidines and materials based on them
Authors: Mognonov D. M. , Tonevitsky Yu. V. , Ayurova O. Zh. , Ilyina O. V. , Kornopoltsev V. N.
Published: January 2019

Aromatic polyamidines were synthesized by polycondensation of equimolecular amounts of bisimidoyl chlorides with diamines in organic solvents. The obtained polymers are dissolved with organic solvents (N, N'-dimethylacetamide, N-methyl-2-pyrrolidone, etc.), and characterized by a large interval between the temperature of plastic deformation and heat resistance, that is a good possibility of processing polyamidine products with new industrial methods.
Investigation of the mechanical properties of polymer matrices based on adhesive binders
Authors: Melnikov D. A. , Petrova A. P. , Dementieva L. A. , Ilichev A. V.
Published: January 2019

The paper considers methods for manufacturing polymer-matrix samples for the determination of mechanical properties outlining the basic approach to the development of modes for pouring and curing of polymer blocks. Samples were made of cured adhesive binders VSK-50, VSK-14-2m, VSK-14-2mR, VSK-14-2mRm, and tests were carried out to determine the following characteristics: tensile and flexural strength, elongation, tensile modulus when stretching and bending.
Adhesion control of platinum coatings at manufacturing platinized niobium anodesby magnetron sputtering
Authors: Kuzmin Yu. L. , Stavitsky O. A. , Lashchevsky V. O. , Bobkova T. I. , Yankov A. L.
Published: January 2019

The paper describes methods and results of determining the values of adhesion at manufacturing platinized niobium working electrodes for cathodic protection against corrosion. The factors influencing these values are determined.
Researching nitrogen solubility in nitrogen-containing austenitic steels at melting and recrystallization by CALPHAD method
Authors: Smirnov L. A. , Gorbachev I. I. , Popov V. V. , Pasynkov A. Yu. , Oryshchenko A. S. , Kalinin G. Yu.
Published: January 2019

The CALPHAD method has been employed to compose thermodynamic description of the Fe–Cr–Mn–Ni–Si–C–N system. Using an algorithm based on finding a global minimum of Gibbs energy, the calculations of system phase composition were performed in the temperature range from 1750°C to hardening and in the range of compositions corresponding to 04Kh20N6G11M2AFB steel. Calculations showed that at temperatures above liquidus line, Cr and Mn increase nitrogen solubility in the melt, while Ni and Si reduce it. With an increase in the content of Cr, Mn, Ni, and Si in steel in the studied composition range, both liquidus and solidus temperature decrease. The degree of influence on these temperatures of Cr, Mn, Ni and Si within the steel grade is different and ranges from ~3 to ~14°C. Calculations taking into account the possibility of nitrogen transfer between steel and the atmosphere of air showed that the amount of fixed nitrogen in the alloy under study varies, depending on the composition of the steel and temperature, from ~0.3 to ~0.6 wt%. As the temperature decreases from liquidus to solidus, the amount of fixed nitrogen increases, with the exception of those steel compositions when ferrite and not austenite is released from the liquid phase.
Technology development and material science substantiation of cold bending for ship hulls parts of high-strength steels and alloys by local deformation
Authors: Budnichenko M. A. , Vainer L. M. , Berezansky L. E.
Published: January 2019

At JSC “PO “Sevmash” a technology of cold bending for ship hull parts from high-strength steels and alloys has been developed by the method of local deformation. A material science substantiation of its implementation has been given. In addition to the practical positive side of parts manufacturing, the local deformation is cost-effective and can significantly reduce the cost of manufacturing parts.
Studying mechanical characteristics of fiber-metal laminate based on aluminum sheets and layers of carbon fiber reinforced plastics
Authors: Voinov S. I. , Zhelezina G. F. , Ilichev A. V. , Solovieva N. A.
Published: January 2019

Results of tensile strength test of layered metal-polymer composite material on the basis of aluminum alloy sheets and layers of carbon fiber reinforced plastics were analyzed. The efficiency of complex anticorrosive protection from the influence of external factors was studied.
A new elephantoid dental specimen from the Miocene of Krusevac basin in Central Serbia
Authors: Radovic Predrag , Bradic-Milinovic Katarina
Published: January 2019

Elephantoid cheek teeth from the late Early and Middle Miocene of Europe
frequently display mixtures of bunodont and zygodont features, making their
taxonomical attributions difficult and subjective. Today, these teeth with
?intermediate? morphologies are attributed either to the mammutid species
Zygolophodon turicensis, or to the gomphothere genus Gomphotherium - as a
variation of G. angustidens or as a separate species G. subtapiroideum. This
paper presents one such specimen, a fragmented lower third molar which
originated from Miocene sandstones within the Krusevac Basin (possibly from
the village of Bela Voda) in Central Serbia. We described the fossil and
examined its metric properties in comparative context. Furthermore, we
applied the semiquantitative method of WANG et al. (2016) in order to reduce
subjectivity in our assessment of the degree of specimen?s zygodonty. Our
results suggested that the specimen resembles Z. turicensis more closely
than either G. angustidens and G. subtapiroideum, both in terms of the
metrics and the degree of zygodonty. However, we were not able to make a
firm taxonomical attribution, due to the fact that the specimen represents
an isolated and incomplete fossil.
Distribution of chromium, nickel, copper and zinc in the Al Zintan area, northwestern Libya
Authors: Alzarog Taher , Vakanjac Boris , Jelic Ivana , Ristic Vakanjac , Naunovic Zorana , Gajic Vuk , Djordjevic-Milosevic Suzana
Published: January 2019

Global population is growing rapidly. As a result, increasingly large areas
are being settled and farmed. This devastates soils and causes pollution by
heavy metals and other components. Heavy metals in the environment originate
from both natural and anthropogenic sources. Natural sources generally
include rock weathering and the propagation of heavy metals, such as Cr and
Ni, from ultrabasic rocks. These are natural processes that generally do not
threaten human health. Anthropogenic sources include industry and
inappropriate disposal of waste in the environment. In such cases
concentrations of heavy metals can be harmful to people and other living
beings. Al Zintan is a city located in northwestern Libya, on a plateau
mainly built up of Cretaceous sediments. Since the 1980?s, nomadic
population has rapidly been settling this area. As a result, a former part
of the desert was transformed and is used for farming. Soil sampling at Al
Zintan was conducted in 2017, across a 2?2 km grid. A total of 143 samples
were collected from depths of about 30 cm. The samples weighed 2 to 2.5 kg
and generally comprised sand with a clay component. A Niton Xl3t goldd+
instrument was used for chemical analyses, based on which GIS heavy-metal
distribution maps were generated. The distribution of Cr, Ni, Cu and Zn is
discussed on the paper.
Nelumbo protospeciosa Saporta 1891 from the Berane Basin (Lower Miocene)
Authors: Djordjevic-Milutinovic Desa , Stevanovic Branka , Culafic Goran
Published: January 2019

Berane Basin in Montenegro has been known for rich paleoflora of diverse
geological ages. The remains of paleovegetation of various ages were
preserved by the lake occurring in this area from Late Oligocene to Early
Pliocene. Therefore, the shifts in vegetation during the Miocene period may
be easily followed by studying the paleofloras collected at the Berane
Basin. The first and only known remains of aquatic (floating) plants were
collected in 1995 at the locality Rosulje (Berane Basin) in the Early
Miocene sediments. According to the morphoanatomical characteristics of
leaves such as shape of lamina, veins, venation, presence of central disk or
position of petiola, the specimens were identified as Nelumbo protospeciosa
SAP., a widely distributed form during the Tertiary of Eurasia. No other
plants or accompanying vegetation were recorded at the Rosulje site, so
presence of Nelumbo protospeciosa was insufficient for determining the
habitat, vegetation or climate during its existence. Therefore the
paleoenvironmental reconstruction also included analysis of the already
published Early Miocene flora from the locality Luge-Haremi (Berane Basin)
and eco-climatic characteristics of recent Nelumbo species. At last was
concluded that Nelumbo, which had leaves at least 30 cm in diameter, used to
inhabit open, well-insolated sites, probably under the influence of the
subtropical/Mediterranean-type climate.
Characterization of Ti6Al4V powders produced by different methods for selective electron beam melting
Authors: Liu Z. , Huang C. , Gao C. , Liu R. , Chen J. , Xiao Z.
Published: January 2019

Three different types of Ti6Al4V powders produced by electrode induction melting gas atomization (EIGA), plasma rotating electrode process (PREP), and plasma atomization (PA) were compared from these aspects: particle size distribution, particle shape, and microstructure. Theywere characterized by particle size and shape analyzer, scanning electron microscope, and X-ray diffraction. The results show some benefits of using PA Ti6Al4V powder in selective electron beam melting. The particle size distribution of these Ti6Al4V powders were bimodal, and the PA Ti6Al4V powder had the narrowest particle size span. The roundness and elongation, the bluntness index of the most analyzed Ti6Al4V powders were greater than 80%. There were 52%, 81%, and 93% Ti6Al4V powders without satellite, respectively. These particle shape results indicate that EIGA, PRER, and PA Ti6Al4V powders have good sphericity and low content of satellites. The flowability of PA (20.55 s/50 g) is better than that of EIGA (24.80 s/50 g) and PREP (25.76 s/50 g). The microstructure of Ti6Al4V powders was composed of martensite ??.
Water glass derived catalyst for the synthesis of glycerol carbonate via the transesterification reaction between glycerol and dimethyl carbonate
Authors: Xu Lanlan , Wang Song , Okoye Patrick , Wang Jianye , Li Sanxi , Zhang Linnan , Zhang Ailing , Tang Tao
Published: January 2019

Water glasses with different modulus (mole ratio of SiO2 to Na2O) were applied as a raw material to prepare five solid base catalysts for the synthesis of glycerol carbonate (GC) by the transesterification reaction between glycerol and dimethyl carbonate (DMC). The structure and properties of the five water glass-derived catalysts were investigated by XRD, FT-IR, FESEM, BET and acid?base titration methods. The catalysts with relatively low modulus, including 1.0, 1.5 and 2.0, presented good catalytic abilities, among which the catalyst derived from water glass with 2.0 modulus (WG-2.0) was chosen as the optimal catalyst in the synthesis of GC. This was because WG- -2.0 showed the highest BET surface area, relatively high total basicity, and needed a less amount of NaOH during the preparation process. In the optimization experiments, this catalyst exhibited good catalytic ability with the glycerol conversion of 96.3 % and GC yield of 94.1 % under the condition of glycerol to DMC mole ratio of 1:4, WG-2.0 amount of 4 wt. %, reaction temperature of 348 K and reaction time of 90 min. Furthermore, the reusability experiment of WG-2.0 was also conducted and the results indicated that WG- -2.0 could be reused five times without significant reduction in its catalytic ability.
Analysis of the needs of problem children towards the quality of life that is moral and characterized
Authors: Hadiwinarto Hadiwinarto , Nirwana Herman
Published: January 2019

This study aims to describe problem children, with a sample of 52 child convicts. In-depth interview techniques with counseling approaches, focused discussions and questionnaires were used for data collection. Data analysis used content analysis techniques and descriptive analysis. This research is the result of the first year of research planned for three years. The results of the study show that: child convicts are in a critical age, a period of seeking identity; have a low education background; very rarely interact socially with their father and mother; Child convicts have various unmet needs in their families. Their needs include: psychological needs, physical needs, social needs, future needs, information needs, and the need to live in character and culture. It is recommended that the results of the first year research be used to determine the right education model for child convicts to lead a moral and characterized life.
Pendidikan Anti Korupsi Dalam Pendidikan Agama Islam
Authors: Imelda Ade
Published: January 2019

Anti-corruption education must be introduced from children to learn about life, meaning that since the beginning the child is introduced to anti-corruption values. Planting carried out consistently and continuously, will foster a child's personality attitude. Basically a person's personality does not appear instantly but through a process. Anti-corruption education can be implemented both formally and informally. At the formal level, elements of anti-corruption education can be included in the curriculum inserted / integrated into the subject. The concept of anti-corruption by getting used to living anti-corruption, through the introduction of an anti-corruption lifestyle, due to corruption, and the planting of religious teaching values into students. The implications of anti-corruption education in Islamic religious education, namely the curriculum must link all subjects to anti-corruption values, learning with habituation and exemplary and teachers must be able to be role models, provide information about the dangers of corruption, and familiarize students with anti-corruption.
Model Kurikulum Pesantren Salafiyah dalam Perspektif Multikultural
Authors: Syafe'i Imam
Published: January 2019

Islamic boarding schools are one of the social religious institutions and Islamic education. In general, all pesantren must have characteristics that are not different, namely an institution whose leaders and caregivers are clerics. One type of boarding school in Indonesia is salafiyah boarding schools with special characteristics, namely salaf (traditional). The learning of classical Islamic books or often called "kitab kuning", is one of the characteristics of the salaf pesantren, especially the works of scholars who have embraced Syafi'iyah ideology which are indeed given in the scope of learning in traditional pesantren whose learning focuses on arrest harfiyah for a certain book (text). Santri is one part of the pesantren elements, there are various social and ethnic strata found in Indonesia, until now there has never been a clash of cultures or fights. An understanding of the views of the people in pesantren seems to have been implemented well, which is likely to be unfamiliar in their texts. The transformation of multicultural education has been integrated in the study of classical texts as well as sourced from normative sources found in the Qur'an and hadith, or through other learning such as PKN which has a multicultural educational content for pesantren which are formal education institutions. An understanding of diversity and eliminating Ika appear clearly in pesantren, there are no discriminatory practices for santri in the learning process or in everyday life, respecting so much ethnic diversity and differences, equality, tolerance and open attitude. Efforts to realize a national education goal through multicultural education / learning in Islamic boarding schools are based more on understanding holistic and constructive Islamic teachings.
Faktor-Faktor yang Mempengaruhi Pemakaian Jilbab di Kalangan Mahasiswi Universitas Swadaya Gunung Jati Kota Cirebon
Authors: Budiyanti Setia
Published: January 2019

Islam represent the religion having system aqidah arranging all religious service to Allah of SWT and fellow being. Perhaps the inclusive of in it dressy rule for people islam more special for Muslimah. Dress muslim is obligation for Muslimah in running syari'at Islam that is close aurat. This research aim to to know the factor influencing undergraduate in dress muslim and to know the relation dress muslim with the understanding and compliance run the other syari'at Islam. Technique of data collecting use the kuesioner propagated to Self-Supporting University undergraduate of Universitas Swadaya Gunung Jati Cirebon. Result of research obtained by 64% undergraduate which dress muslim have followed the religious education and 36% have never followed the religious education. About 36% undergraduate feel fluent read the Al-Qur'An and 64% undergraduate is not fluent read the Al-Qur'An. There are positive correlation between use jilbab with the other religious service execution. About 36% undergraduate dress muslim influenced by the school, 21% undergraduate dress muslim of because direct understanding of Islam teaching, and fresh 14% undergraduate dress muslim of because parent motivation and environmental.