Determination of Thermal Diffusive Properties of Silver and Copper

Copper is used extensively in electrical power transmission, plumbing, cookware, and other applications because it is the most abundant and least expensive of the noble and precious metals, such as copper (Cu) island on silver (Ag) with good electrical and thermal conductivity. Silver’s chemical stability and strong electrical conductivity are two of its most essential characteristics. Bulk Ag has supplanted less expensive non-noble metals like aluminium as a common material for high-quality reflectors of electromagnetic radiation in the visual range. Diffusion is carried out at three different temperatures: 300, 500, and 700 K. For Ag, the lattice parameter was estimated and compared to experimental results. It has been discovered that as the temperature rises, so does the rate of diffusion. 5.24 10112/s is the diffusion prefactor. The effective energy barrier and diffusion coefficient have Arrhenius plot offers the effective energy barrier value of 143.56 meV and diffusion prefactor value of 5.24 10112/s for 10-atom island, according to previous experimental and theoretical studies. In terms of the theoretical and practical work done so far, the diffusion coefficient and effective energy barrier values are in the same range as for the other islands. Near the island, cracks and dislocations have been discovered at 300 K. These conclusions, on the other hand, are consistent with recent discoveries based on ab-initio electron structure calculations.

Author (S) Details

Zulfiqar Ali Shah
Department of Physics, Khwaja Fareed University of Engineering and Information Technology Rahim Yar Khan, Pakistan.

Nimra Arshad
Department of Physics, Khwaja Fareed University of Engineering and Information Technology Rahim Yar Khan, Pakistan.

Sidra Sabir
Department of Physics, Khwaja Fareed University of Engineering and Information Technology Rahim Yar Khan, Pakistan.

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Study of the Compressive Strength Characteristics of Cement Mortar Reinforced with Kenaf Fibre

Kenaf fibre is one of the various products derived from the kenaf plant, which is found in abundance in many places of the globe. The use of kenaf fibre to strengthen cement mortars as a building material yielded positive results in research. Cement mortar mixtures were proportioned to include 1-3 percent fibre volume and 10-30mm fibre length. The composite’s performance is measured in terms of density, water absorption, and compressive strength. According to the findings, water absorption increased with fibre volume but remained within ASTM C 211-77 limitations. The density of the kenaf fibre cement mortar did not change significantly. There is no statistical difference between the means of the compressive strength of plain mortar and those containing 1-3 percent fibre volume at 10mm fibre length, according to an analysis of variance (ANOVA) at a 5% level of significance. The compressive strength data revealed a substantial link between fibre volume, fibre length, and curing age when regression models were built.

Author (S) Details

T. M. Omoniyi
Civil Engineering Department, Abubakar Tafawa Balewa University, PMB 0248 Bauchi, Bauchi State, Nigeria.

Duna Samson
DG/CEO, Nigerian Building and Road Research Institute, Abuja, Nigeria.

Othman Musa Waila
Civil Engineering Department, Abubakar Tafawa Balewa University, PMB 0248 Bauchi, Bauchi State, Nigeria.

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Determination of a Linear Rule between the Osmotic Coefficients on Mole Fraction Base and Several Different Concentration Expressions in Single Electrolyte Solutions

In the paper, a linear rule between osmotic coefficients on mole fraction base and each of several concentration expressions is presented, respectively, in single electrolyte solutions containing various valence inorganic acids, alkalies, and salts, such as uniuni-, biuni-, triuni-, tetrauni-, bibi-, and tribi-valence inorganic acids, alkalies, and salts. A thermodynamic model based on the rule is constructed and successfully used to these electrolyte solutions in order to predict and reproduce their traditional osmotic coefficients and other features. such as the decrease of relative molal vapour pressure, equivalent conductivity, solubility, and even ion interaction effects. The instances with positive outcomes have been provided.

Author (S) Details

Zheng Fang
Chemistry and Chemical Engineering College, Central South University, Changsha 410083, P.R. China.

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Study on Nanophosphors with Partially Polymerized SiO4 Tetrahedra Produced by Evaporation of Ca2Y8(SiO4)6O2: Eu Polycrystals

Pulsed electron beam evaporation of micrometer-sized polycrystalline phosphors of the composition Ca2Y8(SiO4)6O2: Eu generated nanophosphors in the amorphous form for the first time. When particle size decreases from micro to nanodimensional, the Raman spectra is altered, and the prohibited band width of the samples rises. The features of spectrum luminescence in polycrystalline and amorphous states have been investigated. It was discovered that when phosphors move to a nanoamorphous state, their photoluminescence hue changes from red-orange (Eu3+) to blue (Eu2+).

Author (S) Details

M. G. Zuev
Institute of Solid State Chemistry, Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia and Ural Federal University (Named After First President of Russia B. N. Yeltsin), Ekaterinburg, Russia.

V. G. Il’ves
Institute of Electrophysics, Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia.

S. Yu. Sokovnin
Ural Federal University (Named After First President of Russia B. N. Yeltsin), Ekaterinburg, Russia and Institute of Electrophysics, Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia.

E. Yu. Zhuravleva
Ural Federal University (Named After First President of Russia B. N. Yeltsin), Ekaterinburg, Russia.

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Structural and Electrical Studies on Blend Based Mixed Ion- electron Conductor- (PVA: PVK): CH3COONH4: EC System

The goal of this research is to create a mixed ion-electron conductor that can be used as an electrode in electrochemical devices. With this in mind, a preparation and characterization of the PVA:PVK:CH3COONH4:EC system has been attempted. During structural investigations, XRD, Optical Microscopy, SEM, and IR tests confirmed the production of a polymer mix and composite electrolyte system. The addition of ammonium acetate improves the electrochemical window, according to electrochemical studies. As evidenced by I-t measurements, ionic charge transport appears to be dominant. At ambient temperature, the ionic conductivity of this system improves by an order of magnitude, with optimum conductivity (1.2710-3 S/cm) for 0.4 mole ammonium acetate concentration. The behaviour of temperature-dependent bulk conductivity is a mix of Arrhenius and VTF. During a.c. conductivity studies, the Jonscher Power law appears to be followed.

Author (S) Details

S. L. Agrawal
SSI Laboratory Department of Physics, A P S University, Rewa, India.

R. P. Kumhar
Department of Physics, Govt. Maharaja College, Chhatarpur, India.

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Study on Synthesis and Antibacterial Efficacy of Chloro-Substituted 1,3-Thiazines

Thiazines are valuable units in medicinal and pharmaceutical chemistry, with a wide range of biological activity described. This prompted us to use thiourea, phenyl thiourea, and diphenyl thiourea to make chloro-substituted thiazines from 2′-hydroxy-3′,5′-dichloro-4-4′-chlorophenyl chalcone. In this series, we made 4-(2′-hydroxy-3′,5′-dichlorophenyl)-6- (4′-chlorophenyl)-4′-chlorophenyl)-4′-chlorophenyl)-4′-chlorophenyl)-4′-chlorophenyl)-4′-chlorophenyl)-4 4-(2′-hydroxy-3′,5′-dichlorophenyl)-6-(4′-chlorophenyl)-2-imino-1,3-thiazine and 4-(2′-hydroxy-3′,5′-dichlorophenyl)-4-(4′-chlorophenyl)-4-(4′-chlorophenyl)-4-(4′-chlorophen 4-(2′-hydroxy-3′,5′-dichlorophenyl)-2-iminophenyl-1,3-thiazine and 4-(2′-hydroxy-3′,5′-dichlorophenyl)-2-iminophenyl-1,3-thiazine from thiourea and phenyl thiourea, respectively. -6-(4′-chlorophenyl) Diphenyl thioure is converted to -2-iminophenyl-3-phenyl-1,3-thiazine. The antibacterial properties of newly synthesised chloro-substituted 1,3-thiazines were tested against Gram positive pathogens Staphylococcus aureus and Streptococcus sp., as well as Gram negative pathogens Pseudomonas sp. and Salmonella typhi. The UV, IR, and NMR spectrum investigations of all of these substances were used to describe them.

Author (S) Details

A. V. Gajbhiye
Department of Chemistry, MGV’s A.S.C. College, Nampur-423 204, India.

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Investigation of Heavy Metal Bioaccumulation in the Nervous System, Skin and Skeletal Tissues of Wastewater-Fed Fish

In several countries throughout the world, treated municipal wastewater fish are used in fish farming. Due to harmful chemicals and microbiological pollution, it can be dangerous to fish and people who eat it. The effects of heavy metals (Ag, Al, As, and B) on the nervous system, skeletal, and skin tissues of fish, as well as their accumulation in these tissues, are discussed in this study using fish fed in a wastewater treatment plant with secondary treatment as an example. Seasonally, the levels of Ag, Al, As, and B in treated effluent, as well as the skeleton, skin, eyes, and brain tissues of Carassius gibelio species, were studied. The size order of Ag and B concentrations, according to annual averages, was skeleton> skin> eyes>brain and skeleton> skin>brain>eye, respectively. Also, As and Al had skin>brain>eyes>skeleton. All metals studied had TF (Transfer Factor) values greater than one in all four tissues, indicating that the metals induced bioaccumulation as a result of the treated effluent. In both skin and ocular tissue, the size order of TF and BCF (Bio-concentration Factor) values was Ag>Al>As>B. In the skeleton, it was Ag>Al>As>B, while in the brain, it was Al>As>Ag>B. In all tissues, Al’s HQ (Hazard Quotient) showed a carcinogenic risk threshold.

Author (S) Details

Aslihan Katip
Department of Environmental Engineering, Bursa Uludag University, Faculty of Engineering, 16059, Bursa, Turkey.

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Conducting Polymer/Metal Oxide Nanocomposite’s Morphology Dependence on MO Additive Weight Percent

Polyaniline Emeraldine salt (ES) and its composites with metal oxides V2O5, ZnO, and MgO were created utilising a chemical oxidation technique by combining various mass percents of metal oxides with monomer in a polymerization mixture using sulfuric acid as a dopant and APS as an oxidant. The morphological nano shape and nano size of these composites were investigated using SEM examination.

Author (S) Details

U. B. Mahatme
K. Z. S. Science College, RTM Nagpur University, Nagpur, India.

S. D. Thakre
Priradarshani College of Engineering, RTM Nagpur University, Nagpur, India.

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Study on Vibroacoustic Analysis of Marine Engine Supplied with Mixture of Fuels

Various viable possibilities such as biodiesel, hydrogen, alcohols, compressed natural gas (CNG), and liquefied petroleum gas (LPG) are being researched by top crude oil businesses (LPG). The main goal of this study is to compare the vibrations of a Doosan MDT196TI engine fueled by two distinct fuel mixtures: liquefied natural gas with diesel pilot and diesel solo. The combustion temperature, density, and cetane number of LNG and diesel oil differ; the combustion process of various fuels progresses differently, which has an impact on the generated vibroacoustic vibrations (vibrations have a direct impact on the degree of machine degradation). The diagnostic system used in research is based on pizoelectric accelerometers and DSP operations (windowing, Fast Fourier Transform). The conclusions were utilised to interpret the findings, revealing how the tested fuels affect vibrations.

Author (S) Details

Radoslaw Wróbel
Wroclaw University of Science and Technology, 27 Wybrzeze Wyspianskiego st. 50-370 Wroclaw, Poland.

Monika Andrych – Zalewska
Wroclaw University of Science and Technology, 27 Wybrzeze Wyspianskiego st. 50-370 Wroclaw, Poland.

Marcin Tkaczyk
Wroclaw University of Science and Technology, 27 Wybrzeze Wyspianskiego st. 50-370 Wroclaw, Poland.

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Study on Kinetics of Growth and Weight of Vanadium Gel on Short-Circuited Probes from Various Materials

The development of technical processes in the chemical and metallurgical industries has resulted in a considerable growth in research chemical systems with the goal of putting them into practise. The findings of investigations on the speed of increasing vanadium gel on short-circuited probes made of various metals, mainly copper and aluminium, are presented in this article. It is demonstrated that the material of a probe and the configuration of probes in a solution affect the pace of rising gel on probes. The electrochemical character of this process can be determined by studying the formation of vanadic gel on metal probes made of various metals. The formation of vanadic mesogels can be viewed as a macroscopically visible expression of self-organizing processes that occur spontaneously in a solution.

Author (S) Details

Sulejmenov Esen Nurgalyevich
Kazakh-British Technical University, Almaty 050000, Republic of Kazakhstan.

Utelbayeva Akmaral Bolysbekovna
Kazakh-British Technical University, Almaty 050000, Republic of Kazakhstan.

Meldeshov Amangeldy Abdychalikovich
Kazakh-British Technical University, Almaty 050000, Republic of Kazakhstan.

Romanteyev Yuri Pavlovich
Kazakh-British Technical University, Almaty 050000, Republic of Kazakhstan.

Utelbayev Bolysbek Toychibekovich
Kazakh-British Technical University, Almaty 050000, Republic of Kazakhstan.

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