Materials Literature
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Abstract: A simple model of charge ordering is considered. It is shown explicitly that at any deviation from half-filling ($n neq 1/2$) the model is unstable with respect to phase separation into charge ordered regions with $n = 1/2$ and metallic regions with smaller electron or hole density. The model is extended to…
In this study we analyse the structure and composition of the periphyton, upstream and downstream of a fish farm located at an Andean stream. The effluents discharges large quantities of phosphorus and organic matter from the feed remnants and the faeces. The input of organic matter caused a reduction in algal biomass…
Polyhydroxyalkanoate(PHA) is a family of carbon and energy storage materials synthesized by many bacteria,its hydroxyalkanoate monomers have diversified structures.A broad screening process using the FT\|IR technique developed by us previously was carried out.Samples were collected from various geological locations ar…
Two-dimensional x-ray diffraction (XRD 2 ) refers to x-ray diffraction applications with twodimensional (2D) detector and corresponding data reduction and analysis. The two-dimensional diffraction pattern contains far more information than a one-dimensional profile collected with the conventional diffractometer. In or…
Exhaustive extraction of poly(ether ketone) (PEK) with hot chloroform affords a novel range of cyclic oligo(ether ketone)s. The proportion of cyclic material extracted in this way ranged from as high as 13% for laboratory-synthesised PEK to as low as 2% for an industrial development-grade polymer. Extracts were charac…
Abstract Photon-initiated shape transformation of n-alkanethiol-derivatized noble metal nanoparticles has been studied with variations of metal, alkanethiol, and solvent. Silver nanoparticles undergo fragmentation upon irradiation while gold ones barely do. Silver/gold composite particles follow the case of silver wit…
Ruthenium tetroxide (RuO4) is a versatile agent for imparting mass density contrast to saturated hydrocarbon polymers. We have successfully employed RuO4 to examine the microdomain and crystallite morphologies of poly(ethylene-block-vinylcyclohexane) semicrystalline–glassy diblock copolymers via transmission electron…
Mullite whiskers and anisotropic grains that were derived from erbia‐doped aluminum hydroxide–silica gel were studied. Firing 3.0‐mol%‐erbia‐doped isostatically pressed pellets at 1600°C for 1.0–8.0 h resulted in a high surface concentration of mullite whiskers. Their c ‐axes were aligned preferentially along the pell…
The controlled release of citronellal and menthone from α-keto esters was tested in different household and bodycare applications by photochemical irradiation of these esters with artificial light sources or natural sunlight. Quantitative dynamic headspace analyses carried out with different application bases, such as…
The structural properties of Ru(0001) surfaces after various electrochemical treatments were investigated by ex-situ electron diffraction [low-energy electron diffraction (LEED)/reflection high-energy electron diffraction (RHEED)] and Auger spectroscopy experiments in conjunction with cyclic voltammetry. At potentials…
The Mac Donald-type 2 + 2 condensation of the readily available 5-mesityldipyrromethane with acenaphthenequinone leads to the trans (syn and anti) porphodimethenes, respectively, which, after treatment with KOH or NaOMe in THF and subsequent oxidation with air, yield the corresponding trans-8-carboxynaphthylporphyrins…
The liquid crystalline properties of a series of ionic silver complexes [Ag(NH2n-CnH2n+1)2]X (X = NO3, n = 6, 8, 10, 12, 14; X = BF4, n = 8, 10, 12, 14), derived from silver nitrate or tetrafluoroborate and aliphatic amines, have been investigated by optical microscopy, DSC, and X-ray diffraction. The materials exhibi…
A new method of probing surface–surface interactions and calculating attachment energies for morphology predictions, based on the interactions between an infinite surface and a thin finite slice (a nano-crystallite), has been implemented in the ORIENT program package. This, together with existing capabilities for stud…
Significantly prolonged survival rate was obtained for the first time using carcinoma mice models after the administration of single-component liposomes of dimyristoylphosphatidylcholine (DMPC) without any drug. An increase in lymphocytes under optical microscope was observed without any increase in the neutrophils co…
The crystal size of nanocrystalline CdS and CdSe films, electrodeposited from dimethyl sulfoxide solutions containing a Cd salt and elemental S or Se, is shown to depend on the nature of the anion of the Cd salt. Relatively strongly adsorbing anions, such as chloride, result in a smaller nanocrystal size than relative…
A new thermally stable oxo-bridged dinuclear nickel(III) complex has been synthesised and its crystal structure showed two nickel(III) ions with distorted square pyramidal coordination geometry.
This paper describes electrically conductive polymer blends consisting of polyaniline (PANI) dispersed in a polymer matrix. Melt blending of previously mixed, coagulated and dried aqueous dispersions of PANI and the polymer matrix lead to high conductivities at extremely low PANI concentrations (∼0.5 wt% PANI). In the…
Encapsulation of doxorubicin (Adriamycin) in liposome (LipADM) augments the anti-tumor effects of the drug and reduces side effects such as cardiotoxicity. However, it does not always enhance anti-tumor effects because of entrapment by the reticuloendothelial system. In this study, we investigated the anti-tumor effec…
We use the well-established functionals LDA, BLYP, BP86, BP91 and B3LYP as well as the more recent HCTH, PBE and PBE0 functionals to investigate the density functional theory (DFT) metal nuclear magnetic shieldings in ten transition-metal complexes ([Co(CN)6]3−, [Co(NH3)6]3+, Cr(CO)6, [CrO4]2−, Fe(CO)5 , Fe(C5H5)2, [M…
A mathematical model for the galvanostatic discharge and recovery of porous, electrolytic manganese dioxide cathodes, similar to those found within primary alkaline batteries is presented. The phenomena associated with discharge are modeled over three distinct size scales, a cathodic (or macroscopic) scale, a porous m…