Materials Literature
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Corrosion behavior of hot-dip Zn-6%Al-03%Mg alloy coated steel sheets in cyclic corrosion test (CCT) has been investigated.The corrosion resistance was improved with increasing Mg content in the coating layer, and the highest corrosion resistance was observed at 3% Mg. In Zn-6%Al-3%Mg alloy coated steel sheet, the for…
This paper presents the results of investigations on the performance of nonceramic insulators in tropical field conditions. Six different types of 33 kV insulators (silicone rubber, EPDM composite, porcelain, and RTV coated porcelain) were installed at six different test sites exposed to marine, industrial and clean e…
The feasibility of LDPE films containing 0.2 or 0.5% (w/w) hexamethylenetetramine (HMT) as antimicrobial packaging material to inhibit microbial growth on the surface of foods was investigated. As HMT is allowed in Europe to be used as a preservative under certain conditions, and as it is mentioned on the list of addi…
The electrical resistivity and Seebeck coefficient of (R0.9Ca0.1)CoO3 (R = Gd, Sm, Nd, Pr) rapidly decrease with increasing ionic radius of the rare-earth element, and the Seebeck coefficients (p-type) are fairly high at low temperatures and attain low and constant values at high temperatures; (Pr0.9Ca0.1)CoO3 shows t…
The magnetic susceptibility (χ) of 1,6,10,15,19,25,28,32-octa-n-butoxynaphthalocyaninatomanganese(III) tetra-cyanoethanide can be fit to a Curie–Weiss expression with θ = 54 K for T > 150 K, and the χT(T) data are con-sistent with linear chains and can be fit to a Seiden expression for alternating S = 2 and S = 1/2 an…
Recently, the calcined powder of oyster shells has been found to possess antibacterial activity, and has been considered for use as a bactericidal agent. In this study, calcined shell preparations were made from oysters, scallops, clams and roll shells, and their antibacterial activities were compared using total aero…
The enthalpies for formation of five Eu3+ complexes with N-piperidinomethane-1,1-diphosphonic acid (H4pmdp) have been determined by titration calorimetry in 2 M (Na,H)ClO4 media at 25 °C. Both protonation enthalpies and entropies, and the structure of H4pmdp in the solid state indicate protonation of the piperidine ni…
A model for the evolution of plasticity is considered in which the phenotype, undergoing stabilizing selection, is modeled as a linear function of an environmental cue correlated with the phenotypic optimum, with the coefficients z0 and z1 evolving according to standard quantitative genetic theory. In contrast to prev…
We report here a structural and photophysical study of lanthanide monometallic complexes with the macrobicyclic axial phenolic cryptand N[(CH2)2NCH–R–CHN(CH2)2]3N (R = m-C6H2OH-2-Me-5) L as well as of bimetallic complexes with its de-protonated form (L − 3H)3−. The X-ray crystal structure of [DyL(NO3)](NO3)2·2CH3CN· 0…
Silicon oxide (SiOx) film deposition on the surface of oriented poly(propylene) (OPP) films was done to form a new oxygen gas barrier material using plasma polymerization of the tetramethoxysilane (TMOS)/O2 mixture. The SiOx film deposition on OPP films never improved oxygen gas barrier properties. The inefficacy of t…
Structural and electronic properties of electrodeposited Co ( OH ) 2 films on Au electrodes in alkaline solutions have been characterized in situ by Co K‐edge X‐ray absorption spectroscopy (XAS). The results obtained have shown that freshly prepared films undergo spontaneous partial and irreversible oxidation in 1 M K…
The yellow crystals of trans-syn-3,3′-diaryl-2,2′-biindenylidene-1,1′-diones (2) turned to reddish purple crystals when exposed to sunlight, which showed EPR signals of triplet biradicals in the solid state.
A silver/silver chloride microelectrode was developed as a liquid‐phase ion gun for investigation of precursor processes of pitting corrosion. This electrode was set as a probe electrode of a scanning electrochemical microscope and used to induce a local breakdown of passive film on iron. A small amount of chloride io…
A laboratory-based system for measurement of chemicals in sea-water with sol–gel-derived surface-enhanced Raman scattering (SERS) substrates is presented. The motivation behind this work was the development of a marinized prototype sensor. A long-term spectral stability of better than 1 cm−1 over a period of several m…
The dramatic decrease in the quantum yield of the Eu-centred luminescence recently observed in going from [Eu(NO3)3L(MeOH)] (2.8%) to the triple helical [Eu(L)3](ClO4)3 complex (8.2 × 10−5%) prompted us to perform a theoretical analysis in order to find out which parameter might be responsible for this quenching. In p…
Solid dispersions of itraconazole (ITR) in lactose, microcrystalline cellulose (MCC), and three superdisintegrants (Primogel, Kollidon CL, and Ac-Di-Sol) and their formulation into tablets were investigated with an objective of enhancing the dissolution rate of ITR from tablet formulations. X-ray diffraction (XRD) and…
The insulation effect of an inclusion complex formed by polyaniline with emeraldine base as a conducting polymer and β-cyclodextrin as insulators of cyclic form has been studied using the oxidation by iodine in solution of N-methyl-2-pyrrolidone. When polyaniline is oxidized by iodine in the solution, the solution col…
Description STP 1357 describes worldwide recent developments on this topic and examines their practical applications. It also identifies important unsolved fundamental problems. 18 peer-reviewed papers are grouped under the subheadings of Polymers and Composites. Polymers covers Composites addresses Audience: Engineer…
The atomistic simulation of properties and phenomena in solid materials requires a suitable model of the real system with a number of atoms which is still manageable at the chosen level of approximation. Since typical solids consist of atoms in the order of 1023, only a very small fraction of them can be treated expli…
Mesoporous SnO2–SiO2 composite stable up to 600 °C with a BET surface area of 350 m2 g−1 and an average pore size of 3.4 nm is successfully prepared, which exhibits promising cycling properties as anodes for lithium batteries.