Materials Literature
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We reported a study of the structural and magnetic properties of BaZrO3 (BZO) as possible substrate material for the production of YBa2Cu3O7-δ (YBCO) superconducting films. Rietveld analyses of the X-ray diffraction pattern show that BZO crystalizes as a cubic perovskite, space group Pm3m (#221). Chemical stability an…
A candidate concept for a Lithuanian repository for low-level radioactive waste (LLW) implies location above the groundwater level and placement of the waste in concrete vaults surrounded by smectitic clay of appreciable thickness as all-around embedment for retarding wetting and minimizing exposure of the waste packa…
Silica being insoluble in non-fluoride medium, anodic oxide films are readily formed on silicon. Dissolution of any oxide film in HF leaves a surface covered with hydrogen. Anodization in HF leads to the formation of porous silicon, the hydrogen coating staying present during the process. At higher potentials, electro…
Mechanical and chemical properties of magnesium and its alloys can be significantly improved by decreasing grain size which can be achieved by continuous or discontinuous dynamic recrystallization activated during hot deformation. The present work is focused on the study of the mechanism of dynamic recrystallization m…
The accuracy of crash analysis is important for design of car body with crashworthiness and depends on some properties of applied material. Strain rate dependency of flow stress and bake hardenability caused by painting process of car body are of particular significance to crash analysis. Here, developed technologies…
Ion exchanged ETS-4 samples by Cs + , Mg 2+ , and Ba 2+ cations were analyzed by single crystal X-ray diffraction at 150 K. Structural data obtained from low temperature (LT) experiment are compared with the room temperature (RT) ones obtained from the same samples. The study shows that the low temperature conditions…
For forest soils, which are naturally acidic, there is only a limited number of reports, concerning their cation exchange capacity (CEC) controlling mechanisms and on the possible impacts of acidic deposition, climate change and increasing harvesting pressure for biofuels. Therefore, the aim of this investigation was…
A new method for identification of texture in agricultural machinery with interpolation of biaxial anisotropy of elastic modulus of thin-plate polycrystalline elements has been developed. The dependence of shear modulus and modulus of longitudinal elasticity as a function of an angular distribution of Poisson’s ratio,…
Phosphoric acid (H3PO4) is produced at General Fertilizer Company in Homs city by a reaction between phosphate and sulfuric acid (H2SO4), forming a thick slurry, which is exposed to filtration to produce polluted Phosphoric acid. The corrosion behavior of stainless alloys was investigated in phosphoric acid using elec…
In we put forward an approximate mathematical model of flexural- rotary vibrational movements in a twin pipeline bent by gravity. The model was developed in an assumption of low pillar elasticity and pipe deformations associated with the pipe leave out of the flexure plane and takes account for the Archimedes buoyancy…
In this research the effect of laser energy by using argon gas on the some physical properties of semiconductor film of TiO2, was studied used Q-Switch Nd:YAG laser in different energies (600-1000) mJ with temperature 100 0 C for glass substrate under vacuum nearly 10 -3 , and by AFM test the roughness of films increa…
Solid propellants are used in forms called grains. A grain is any individual particle of propellant regardless of the size or shape. The shape and size of a propellant grain determines the burn time, amount of gas and rate produced from the burning propellant and consequently thrust vs time profile. In this paper, the…
This paper describes selection of individual components for sealing elements in environment of melted salts. Individual suitable nickel and non-nickel alloys along with flexible elements of the sealing (graphite foil, mica) are described. In conclusion are outlined individual experimental procedures for long-term test…
The in∞uence of beam convergence on the photonic band- gaps, or stop-bands (SBs), of one-dimensional photonic crystals (1D PCs) is investigated. The investigation is based on an analysis of the gap map obtained from re∞ection spectra, calculated by the transfer matrix method for various angles of light incidence, ', a…
Ac conductivity studies and complex impedance spect roscopic studies were carried out on Ba(NO3)2-KNO3 mixed crystals in the temperature range from room t emperature to melting points of their respective sy stems and the frequency range from 50 KHz to 1 MHz. Dielectric co nstant, loss tangent, capacitance and AC condu…
Superconducting MgB2 nano materials were synthesized utilizing the Horizontal Steam Stage Gem Growth (HVPCG) technique with growth conditions of 900℃ , 1000℃ , 1100℃ and 1200℃ with heating time of two to 12 hours with a twotime increment. The big structures were proverbial by their floor morphology, crystal structure…
A organic nonlinear optical material thiourea doped l-threonine single crystal has been synthesized and grown by slow solvent evaporation technique at room temperature using water as solvent. Single-crystal X-ray diffractometer was utilized to measure unit cell parameters and to confirm lattice parameter. SHG efficien…
There has been a rapidly growing trend towards the use of nanomaterials (NM) in healthcare and bioanalytical sciences during the last decade. It has led to a wide range of prospective applications of NM in biosensors, diagnostics, therapeutics, drug delivery, medicine, biomedical imaging, signal enhancement, naked-eye…
30% 1.27 (0.61) A 7 0.39 (0.16) D 7 0.18 (0.02) Ca 0.11 (0.01) Cb 0.08 (0.01) Cb 0.10 (0.01) Cb 20% 1.20 (0.61) AB 14 0.80 (0.31) C 14 0.27 (0.03) Ba 0.17 (0.02) Bb 0.13 (0.02) BCb 0.16 (0.02) Bb 10% 0.96 (0.58) B 21 1.22 (0.45) B 21 0.34 (0.03) Aa 0.21 (0.03) Bb 0.17 (0.02) ABb 0.21 (0.03) Ab 0 0.63 (0.42) C 28 1.69…
Available online at www.macvetrev.mk Taking into consideration the importance of the distribution and transfer of radio nuclides in soil, an attempt was made in this work to determine the concentration of 226 Ra, 232 Th 40 К and 137 Cs in the same. The concentrations of activity in the gamma- absorbed dose rates of th…