Materials Literature
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Abstract Mesoporous hydroxyapatite (MHA) with a rod-shaped morphology has been successfully synthesized for the first time employing cetyltrimethylammonium bromide (CTAB) as a template and CaCl2 and K2HPO4 as the precursors for hydroxyapatite under alkaline medium at the reaction temperature of 120 °C via microwave me…
The structural, electronic and elastic properties of Rb—As systems (RbAs in NaP, LiAs and AuCu structures, RbAs 2 in the MgCu 2 structure, Rb 3 As in Na 3 As, Cu 3 P and Li 3 Bi structures, and Rb 5 As 4 in the A 5 B 4 structure) are investigated with the generalized gradient approximation in the frame of density func…
The study wascarried out to determine the antifeedant activity of different solvent extracts(0.625, 1.25, 2.5 and 5%) of Calotropis procera leaves against thirdinstar larvae of Spodoptera litura by leaf dip method. The maximum activitywas recorded in chloroform extract followed by hexane, ethanol, acetone, ethylacetat…
Caner Nazli1, Tugba Ipek Ergenc2, Yasemin Yar1, Havva Yagci Acar1,3, Seda Kizilel1,21Graduate School of Sciences and Engineering, Koç University, 2Department of Chemical and Biological Engineering, College of Engineering, Koç University, 3Department of Chemistry, Faculty of Arts and Sciences, Koç University, Istanbul,…
The aim of this study was to evaluate the degree of conversion (DC) of two composite resins with different shades that were light cured by light-emitting diodes (LEDs) of different irradiances. Specimens (5 mm ' 2 mm) were prepared with a nanofilled (Filtek Supreme - A2E, A2D, and WE) or microhybrid resin (Opallis - A…
The present work deals with two essential degradation mechanisms of zirconium alloys: Hydrogen behavior and microstructural transformations due to neutron irradiation. The studies were carried out by using samples taken from Zircaloy-4 components, which remained for 14 years in the Atucha I pressurized heavy water rea…
A systematic study on the Ag nanoparticle (NP)-mediated light trapping in thin film hydrogenated microcrystalline Si (µc-Si:H) solar cells is described. In this study, a unique wet-chemical approach was applied to allow the assembly of light scattering Ag NPs inside the rear ZnO:Ga layer of µc-Si:H solar cells in a co…
In this study, we investigate the effect of dielectric layer thickness on light reflection due to random self-assembled Ag nanoparticles with diameters of less than 160 nm deposited on the Si substrate, indicating that a dielectric layer with an appropriate thickness is useful for reducing the amount of reflected ligh…
Although the complete mechanisms are not yet fully understood, it is well established that the secondary phase particle (SPP) size distribution and chemical composition have a crucial affects in the reactor corrosion rate and hydrogen uptake in boiling water reactor (BWR) cladding. To further study these effects, diff…
ceramic Engineering Division, Department of Chemical Technology, University of Calcutta, 92, Acharya Prafulla Chandra Road, Kolkata-700 009, India E-mail : mail me. tapan@gmail.com Fax : 91-33-23519755 Department of Chemistry, Jadavpur University, Kolkata-700 032, India Manuscript received 19 May 2011, revised 25 July…
Novel corrosion inhibitor as a green chemical product namely derivative, 2-amino 5-oleyl-1,3,4-thiadiazol (AOT) was synthesized by cyclization of oleic acid. The new corrosion inhibitor was characterized by FT-IR and NMR spectroscopical methods. AOT was evaluated as corrosion inhibitor for mild steel in 1M of Hydrochl…
Sandwich-type asymmetric complexes of yttrium, neodymium, gadolinium, and dysprosium were synthesized by the reaction of the corresponding meso-trans -bis(hexadecyl)tetrabenzoporphyrinates with dilithium phthalocyianine. Spectral properties of these compounds were investigated.
In the paper, we describe new Ir complexes for achieving efficient blue phosphorescence. New blue-emitting mixed-ligand Ir complexes comprising one cyclometalating, two phosphines trans to each other such as Ir(dppz)(PPh3)2(H)(L) (Ll= Cl, NCMe+, CN), [dppz = 3,5-Diphenylpyrazole] were synthesized and studied to tune t…
Emission spectroscopy of the laser induced plasma is used to characterize the laser synthesis of silver nanoparticles in water via attributing the thermodynamic parameters of the plasma plume to qualitative features of the synthesized nanoparticles. In this approach, effects of the pulse energy and frequency of a puls…
An original solution phase approach was developed for the synthesis of single-crystal Au nanoprims with anisotropic structure of triangular, hexagonal and truncated triangular, nanometre or micrometer scale, and nanometer thickness. It has been confirmed that the Fe3O4 magnetite nanoparticles and (3-aminopropyl) triet…
Abstract N-methylol dimethylphosphonopropionamide flame retardant agent (FR) combined with a melamine resin crosslinking agent (CL) and a catalyst (phosphoric acid, PA) is used for enhancing the flame-retardant property of cotton fabrics. Titanium dioxide (TiO 2 )/nano-TiO 2 co-catalyst is added to the FR formulation…
(Bi2Te3)(1-x)(PbTe)(x) binary systems near eutectic composition were prepared by melting of elemental metals and a sequential water quenching process and their microstructures and thermoelectric properties were investigated. Multiple phases such as Bi2Te3, BiPbTe and PbTe were observed due to phase separation when the…
Dielectric spectroscopy is applied to investigate the electrical properties of a barium neodymium niobate, Ba(Nd0.5Nb0.5)O3 (BNN) in a temperature range from 323 K to 453 K and in the frequency range from 50 Hz to 1 MHz. The X-ray diffraction of the sample at room temperature shows a tetragonal phase. The scanning ele…
The design of ceramic chemical microreactor for the production of hydrogen needed in portable polymer-electrolyte membrane (PEM) fuel cells is presented. The microreactor was developed for the steam reforming of liquid fuels with water into hydrogen. The complex three-dimensional ceramic structure of the microreactor…
Abstract The advantages of atom‐transfer radical polymerisation (ATRP) for synthesising well‐defined polymers have made this technique very popular in recent years for the synthesis of new polymers and copolymers with optical properties. The components involved in ATRP and their effect on composition, functionalities…