Materials Literature
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We investigated the field emission properties of single-wall carbon-nanotube (CNT)-dispersed conducting polymer thin film prepared by spin coating and electrophoresis. A p-type conducting polymer such as poly(3-octylthiophene) (P3OT) or poly(2-methoxy, 5-(2'-ethyl-hexyloxy)-p-phenylenevinylene) (MEHPPV) doped with CNT…
Symmetric alkylthiophene-based mixed heterocyclic trimer and pentamer, containing central oxadiazole units, have been prepared. Because of the electron-withdrawing properties of oxadiazole, the trimer cannot be electropolymerised and undergoes an oxidative-type destruction at high potentials. In contrast, the pentamer…
The synthesis and structural characterization of the first examples of aromatic core-modified figure-eight octaphyrins with six meso links and their formation with and without acid catalysts are highlighted.
The surface of Flavobacterium psychrophilum was examined by electron microscopy to determine if previous findings of haemagglutination positive (HA+) and haemagglutination negative (HA-) abilities could be correlated with expression of pili or of a capsular layer. A thin capsular layer was observed in both HA+ and HA-…
A new inclusion compound with a one-dimensional molecular arrangement of organic radicals (2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO)) was prepared using the template compound of tris(o-phenylenedioxy)cyclotriphosphazene (TPP) by the following two methods: i) adsorption of TEMPO vapor under vacuum at 313 K and ii) s…
Using a succinyl ester linker, a terthiophene bearing a pendant biotin hydrazide in the 3′ position (4-{N′-[5-(4,6-dioxo-hexahydrothieno[3,4-c]pyrrol-3-yl)-pentanoyl]hydrazino}-4-oxo-butyric acid 2-[2,2′:5′,2″]terthiophen-3′-yl-ethyl ester, 4) has been prepared in three steps from 2-[2,2′:5′,2″]-terthiophen-3′-yl-etha…
8 pages, 7 figures.-- PACS nrs.: 64.70.Md, 64.60.My.-- ArXiv pre-print available at: http://arxiv.org/abs/cond-mat/0411584
<title>Abstract</title> This paper focuses on the pros and cons of using periphyton (phototrophic biofilms) as monitoring tools in natural and managed aquatic ecosystems. The structural (biomass, community composition) and physiological (pigment composition, photosynthesis) descriptors of periphyton are critically exa…
Recent progress in fuel cell technology development for automotive application urges the need of an appropriate fuel for the next generation of cars. There has a basic consensus emerged within the engineering community and the environmentalists that hydrogen as an energy carrier should be the successor of fossil fuel…
The controlled growth of gold nanoclusters in polyaniline is predicated by the ability of PANI to switch from conducting to insulating form and by the fact that imine nitrogens form a strong complex with chloroaurate anions. The principal technique used in this study has been chronopotentiometric stripping. The chrono…
A hydrotropic dendrimer, made of polyglycerol dendrimer of generation 4 (PGD-G4), was conjugated with cholesterol. The self-assembled structure of the conjugate in water was characterized by 1H-NMR, dynamic light scattering (DLS) and atomic force microscopy (AFM). One cholesterol molecule was conjugated to PGD-G4, whi…
Coarse-grained simulations are described in which the behaviour of a system of model liquid crystalline dendrimer molecules is studied in both liquid and smectic-A liquid crystalline phases. The model system is based on a third generation carbosilane dendrimer, which is functionalised at the surface by short polymeric…
Significant tensile-compressive yield asymmetry was observed in both low and high pressure die cast polycrystalline magnesium alloys AM50, AE44 and AJ62A between room temperature and 125 °C. Yield strengths measured under tension were higher than those under compression with the average yield asymmetry ratio of 0.85 e…
Understanding of the formation mechanism of dioxins in the sintering bed is of importance in developing countermeasures to reduce the emission of dioxins from sintering plants. This research has clarified the behavior and the possible mechanism of dioxin formation and the relation to Cl and Cu components in the sinter…
This study investigates the behaviour of selected, morphologically important surfaces of dolomite (CaMg(CO3)2), using computational modelling techniques. Interatomic potential methods have been used to examine impurity substitution at cationic sites in these surfaces. Environmentally prevalent cations were studied to…
The sensing properties of the planar scandia-stabilized zirconia based mixed potential gas sensor coupled with hydrothermally obtained nanosized ITO as an electrode material have been investigated. The planar sensor has shown good sensitivity to low-level of CO concentrations (16-500 ppm) in a lower oxygen ambient (4…
Melt spinning of nanocomposites prepared from syndiotactic poly(propylene) (sPP) and organolayered silicate (M-ODA), containing bound octadecyl ammonium chains, was investigated. The influence of the nano-filler reinforcement and the role of the addition of maleic anhydride grafted isotactic poly(propylene) (iPP-g-MA)…
Antitumor activity of the ethanol extract from the root tuber of Cynanchum auriculatum Royle ex Wight and four fractions of the ethanol extract were investigated, both in vitro and in vivo. The five samples exhibited cytotoxic activity on human tumor cell lines K562, SHG44, HCT-8, A549, PC3, in vitro and inhibition in…
Dimers based on CuII azomethine complexes exhibited both intra- and intermolecular ferromagnetic exchange interactions, as found from magneto-structural correlations.
Recently, it was proposed that neutrophils generate ozone. Evidence for the proposal is based largely on three experimental systems using probes that are known to react with ozone. However, further assessment of the findings shows that in each case, there is a plausible alternative explanation. Oxidation of indigo car…