Materials Literature
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The new dodecadentate tripodal ligand trenterpy in the presence of lanthanide triflates leads to the self assembly of homotrinuclear lanthanide complexes.
The magnetic and crystallographic properties of induction-melted SmMn/sub 6-x/Fe/sub x/Ge/sub 6/ compounds, where x is 0, 0.5, 1.0, and 1.5, have been studied using X-ray diffraction and bulk magnetic measurements between 30 and 490 K. All of the samples crystallized in the YCo/sub 6/Ge/sub 6/-type structure with the…
This work presents a comparative study of the compatibilization of four binary blends with slight differences in their chemical structures. The natural polymers chitin (QA) and chitosan (QN) are blended with polyamide 6 (PA6) and polyamide 66 (PA66). The results, obtained using differential scanning calorimetry, infra…
A nickel(II)tetramer with azide and di-2-pyridyl ketone (dpk) of general formula [Ni(dpk·OH)(N3)]4·2H2O (dpk·OH being the deprotonated gem-diol resulting from hydrolysis of dpk) was synthesized and structurally characterised through X-ray single crystal diffraction analysis and IR spectroscopy. The structure consists…
The linear combinations of Gaussian-type orbitals–fitting function (LCGTO-FF) technique is used to study the zero-pressure properties of crystalline uranium dioxide, a prototypical heavy element bearing Mott–Hubbard insulator. The effects of several common approximations are examined: (1) scalar vs. full relativity; (…
We introduced a triode structure with p–n junctions on both sides into single-crystalline bifacial silicon solar cells in order to improve solar cell performance. These fabricated bifacial silicon solar cells have an energy conversion efficiency of 21·3% under front 1 sun illumination (the standard 1 kW/m2 AM 1·5 glob…
Pyrroles fused with bicyclo[2.2.2]octene and bicyclo[2.2.1]heptene frameworks are prepared by a modified Barton–Zard method. Structures of these pyrroles and thermal behaviours of the former pyrroles are studied by X-ray and DSC analyses.
The aims of this study were to characterize certain physicochemical, pharmacokinetic, and enhancement properties of a new macromolecular contrast agent, carboxymethyl hydroxyethyl starch-(Gd-DO3A)(35) [CMHES-(Gd-DO3A)(35)], consisting of a polysaccharide backbone covalently derivatized with multiple macrocyclic chelat…
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.