Materials Literature
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Novel hyperbranched (HB) polyesters with interior 4,7-diphenyl-2,1,3-benzothiadiazole (DBT) units were prepared by melt polycondensation of a dimethyl ester derivative of DBT (BMBT) (A2 monomer) with 2-hydroxymethyl-2-methyl-1,3-propanediol (HMP) (B3 monomer) at various mole ratios (A2/B3) via an A2 + B3 approach. The…
An excimer laser assisted metal organic deposition process for the preparation of vanadium dioxide (VO2) films is described. When a precursor film grown on a silica glass substrate by preheating at 300°C was irradiated with a KrF laser at room temperature in air, the film was crystallized into polycrystalline VO2 phas…
This paper compares the results yielded by two methods of small-angle X-ray scattering data analysis for semicrystalline polymer blends. The first method is based on the use of a theoretical modeling for isotropic samples and a subsequent curve fitting. The second one is a more familiar method, based on the calculatio…
The durability of a hybrid ceramic 25-mm-bore ball bearing having a single outer land-guided retainer was evaluated and improved in liquid hydrogen at speeds up to 120,000 rpm (120,000 min-1) (3 million DN) by comparing the propagation of superficial thermal microcracks on Si3N4 balls at various speeds. To select a to…
BACKGROUND: Dengue virus along with the other members of the flaviviridae family has reemerged as deadly human pathogens. Understanding the mechanistic details of these infections can be highly rewarding in developing effective antivirals. During maturation of the virus inside the host cell, the coat proteins E and M…
The photoluminescence properties of under vacuum UV and UV excitation were investigated, and visible quantum cutting through downconversion was observed in this phosphor. Upon excitation, one UV photon absorbed by could be split into more than one visible photon emitted by through cross relaxation and direct energy tr…
Poly (ethylene-co-vinyl acetate) (EVA) is the major polymer used for photovoltaic (PV) modules encapsulation. Its degree of cross-linking (related to its gel content) is taken as a major quality reference. Differential Scanning Calorimetry (DSC) has been proven to be fast and effective but is to determine the gel cont…
The binding energy, electronic structures, optical absorption and reflection spectra of the formaldehyde (HCHO) adsorption on B-doped single-walled (8,0) carbon nanotubes have been investigated using density functional theory based on first principles. The calculated results show that the B-doped SWCNT is sensitive to…
Abstract. Due to its high radiative stability and superior optoelectronic properties, such as wide direct band gap of ~3.4 eV and high exciton binding energy of ~60 meV, ZnO is considered for the fabrication of ultraviolet and visible light emitting and laser diodes, solar-blind photodetectors. Although proof-of-conce…
We have studied the deposition of BaTiO 3 (BTO) thin films on various substrates. Three representative substrates were selected from different types of material systems: (i) SrTiO 3 single crystals as a typical oxide, (ii) Si wafers as a semiconductor, and (iii) Ni foils as a magnetostrictive metal. We have compared t…
Carbon nanotubes [CNTs] have excellent electrical, mechanical, optical and thermal properties. However, efficient dispersion of CNTs in any medium requires their functionalization. In this work, CNTs prepared from the catalytic process have been functionalized under three different conditions using the same acid oxidi…
The preparation of cellulose solutions is important for derivatization and blend formation of this natural polymer. Besides solvents like CS 2 /NaOH and NMMNO*H 2 O unconventional solvent system can be applied for dissolution of cellulose. This group of solvents includes inorganic molten salts and salt hydrates. Inorg…
The inhibition efficacy of Emblica officinalis leaves extract on the corrosion of Copper and its alloy (Cu-27Zn) in Natural sea water environment has been studied by mass loss measurements at various time and temperature. The inhibition efficiency is markedly higher in Natural sea water environment with addition of Em…
Dynamic mechanical performance experiments were carried out for three types of rocks under different confining pressures and cyclical impact loadings by using split Hopkinson pressure bar with confining pressure device. The stress-strain curves of specimens under cyclical impact loadings were obtained. According to th…
The structural characteristics of composite insulators lead to uneven distribution of its potential,there are strong electric field area near both ends of fittings.Because of the error installtion of a power supply company,leading to the grading ring of 110 kV composite insulators installed on its end housing,discharg…
A study on the diversity of benthic diatoms and water quality of the Ping River, Northern Thailand were carried out from December 2004-December 2005. Samples were collected from 15 sites covering the whole river. The water quality was based on specific physical and chemical factors indicated the water in the Ping Rive…
It have been studied the structure, phase composition and the specific surface of alumina-based powder systems produced by the method of thermal decomposition of hydroxide aluminum and the plasma-spray pyrolysis method. It was shown that in the plasmochemical powder there is a sharp transition to the -form in a narrow…
Nystatin and Terbinafine are antifungal drugs with well-known antifungal properties. In the present study we investigated the potential of PAMAM and PPI dendrimers of different generations as tool for enhancement of antifungal activity of selected two antifungal drugs. Microbilogical study showed that PAMAM and PPI de…
The efficacy of an acid extract of leaves of Sida rhombifolia.L as corrosion inhibitor for mild steel in 1M phosphoric acid medium, was carried out using weight loss measurements, polarization and electrochemical impedance spectral studies. Experiments are performed by varying immersion period, concentration of the in…
The aim of the present work was to evaluate the stress corrosion cracking (SCC) behavior of the annealed Al-7075 alloy before and after Equal Channel Angular Pressing (ECAP). The SCC behavior of the Al-7075 alloy before and after ECAP was evaluated using slow strain rate testing (SSRT). Tensile and SCC behavior of the…