Brookite-supported highly stable gold catalytic system for CO oxidation
A significant enhancement of the gold catalysis stability against sintering has been achieved using brookite as a catalytic support.
Materials Literature
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Self-immolative dendrimer biodegradability by multi-enzymatic triggering
New self-immolative dendritic molecules have been designed and synthesized. The dendrons are built with a multi-enzymatic triggering mechanism, which initiates their biodegradation through a self-immolative chain fragmentation to release a reporter group from the focal point. The dendritic backbone is constructed from…
Electrochemical Surface Transfer Doping
Intrinsic diamond with a bandgap of 5.4 eV exhibits a surface conductivity (SC) of the order of 10 − 5 Ω − 1 when terminated by hydrogen. This conductivity is carried by a hole-accumulation layer close to the surface with an areal carrier concentration of about 10 13 cm − 2 , and it has already been utilized for a uni…
Anticancer Activities ofOldenlandia diffusa
Objectives: To investigate the anticancer activities of a Chinese herb, Oldenlandia diffusa (Bai Hua She She Cao).Methods: The water extract of the raw herb Oldenlandia diffusa was used in this study. The in vitro anti-proliferative activities of the extract were tested against eight cancer cell lines and one normal c…
Microfibrillar Reinforced Composites from PET/LDPE Blends: Morphology and Mechanical Properties
Microfibrillar reinforced composites (MFC) comprising an isotropic matrix from a lower melting polymer, i.e., low density polyethylene (LDPE), reinforced by microfibrils of a higher melting polymer, recycled from bottles, i.e., poly(ethylene terephthalate) (PET), were processed under industrially relevant conditions v…
Synthesis and spectroscopic properties of aniline tetramers. Comparative studies
A new synthetic method involving SNAr coupling of 4-fluoronitrobenzene to arylamines, followed by the reduction of the nitro groups, has been developed. Two types of aniline oligomers, namely Ph/NH2 and NH2/NH2 tetramers have been prepared by this method. Tetramers in the leucoemeraldine and in the emeraldine oxidatio…
Direct-Alcohol SOFCs: Current-Voltage Characteristics and Fuel Gas Compositions
Power generation characteristics of solid oxide fuel cells (SOFCs) for alcohol-based fuels are measured and compared with those for simulated reformed gas in equilibrium compositions. We demonstrate direct-alcohol SOFCs for methanol, ethanol, propanol, and butanol. Current-voltage characteristics for the methanol-base…
Synthesis of BaTiO 3 Particles with Tailored Size by Precipitation from Aqueous Solutions
Well‐defined and stoichiometric spherical particles of BaTiO 3 of narrow size distribution were produced at 82° and 92°3C by precipitation from chloride solutions in a strong alkaline environment. The size of the particles can be tailored in the range from ≅10 3 to 70–80 nm by increasing the barium concentration from…
Antiferromagnetic coupling between rare earth ions and semiquinones in a series of 1 ∶ 1 complexes
We use the strategy of diamagnetic substitution for obtaining information on the crystal field effects in paramagnetic rare earth ions using the homologous series of compounds with the diamagnetic tropolonato ligand, Ln(Trp)(HBPz(3))(2), and the paramagnetic semiquinone ligand, Ln(DTBSQ)(HBPz(3))(2), (DTBSQ = 3,5-di-t…
Resonant frequencies of a split-ring resonator: Analytical solutions and numerical simulations
A set of differential equations describing the current and voltage distribution in a split-ring resonator is derived and solved analytically. The resonant frequencies may be obtained from the solution of a characteristic equation. An approximate solution for the lowest resonant frequency agrees with that obtained by h…
SYNTHESIS AND MESOMORPHIC PROPERTIES OF SCHIFF BASE ESTERS ORTHO-HYDROXY-PARA-ALKYLOXYBENZYLIDENE-PARA-SUBSTITUTED ANILINES
A series of new compounds o-n-hydroxy-p-n-hexadecanoyloxybenzylideneaniline and its substituted derivatives was synthesized from the esterification of palmitic acid with intermediary Schiff bases, which posssess various terminal substituents X (X = H, F, Cl, Br, OCH3, CH3, and C2H5). All compounds possess mesomorphic…
Characterization of Sericin Powder Prepared from Citric Acid-degraded Sericin Polypeptides of the Silkworm,Bombyx Mori
Acid-degraded sericin powder (AC-SP) was prepared from aqueous solution containing citric acid-degraded sericin polypeptides of Bombyx mori. The morphological and biochemical properties of AC-SP were compared with those of alkali-degraded sericin powder (AL-SP) and hot-water degraded sericin powder (HW-SP). Based on a…
Designing dinuclear iron(ii) spin crossover complexes. Structure and magnetism of dinitrile-, dicyanamido-, tricyanomethanide-, bipyrimidine- and tetrazine-bridged compounds
In order to expand the few known examples of dinuclear iron(II) compounds displaying (weak) intradinuclear exchange coupling and spin-crossover on one or both of the iron(II) centres, various dinuclear compounds have been synthesised and assessed for their spin-crossover and exchange coupling behaviour. The key aim of…
Synthesis, crystal structures and magnetic properties of single and double cyanide-bridged bimetallic Fe2IIICuII zigzag chains
The bimetallic complexes [[Fe(III)(phen)(CN)4]2Cu(II)(H2O)2].4H2O (1), [[Fe(III)(phen)(CN)4]2Cu(II)].H2O (2) and [[Fe(III)(bipy)(CN)4]2Cu(II)].2H2O (3) and [[Fe(III)(bipy)(CN)4]2Cu(II)(H2O)2].4H2O (4) (phen = 1,10-phenanthroline and bipy = 2,2'-bipyridine) have been prepared and the structures of 1-3 determined by X-r…
Investigation of Hydrogen Adsorption and Absorption in Palladium Thin Films
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Calcium carbonate scale control, effect of material and inhibitors
This paper focuses on developing a reproducible method for reducing calcium carbonate scale formation on heated surfaces where scaling can cause serious problems. It is known that calcium carbonate precipitation is sensitive to impurity ions, such as iron and zinc, even at trace concentration levels. In this paper two…
Optimization of a Quasi‐Solid‐State Dye‐Sensitized Photoelectrochemical Solar Cell Employing a Ureasil/Sulfolane Gel Electrolyte
Abstract A quasi‐solid‐state, dye‐sensitized photoelectrochemical solar cell employing a gel electrolyte obtained by sol–gel chemistry is described. The gel electrolyte is based on a ureasil precursor (i.e., a poly(propylene oxide) oligomer end‐capped by triethoxysilane groups through urea bridges) and sulfolane and i…
Raman study of tetraglyme–LiClO 4 solvate structures
Lithium perchlorate has been dissolved in tetra(ethylene glycol) dimethyl ether (tetraglyme or G4) to obtain (G4)n–LiClO4 mixtures with 1/2 ≤ n ≤ 80. The conformational changes and ionic interactions occurring in the crystalline and liquid phases as a function of temperature and salt concentration have been investigat…
A guide to shape memory and superelasticity in Nitinol medical devices
Shape memory and superelasticity properties of Nitinol have allowed the development of many novel medical devices. The intent of this paper is to approach the shape memory effect from the perspective of the attributes of a simple, yet elegant Nitinol device, the Homer Mammaloktrade mark needle localizer. Manufacturing…
Sulfation of silk sericin and anticoagulant activity of sulfated sericin
Silk sericin extracted from a cocoon was sulfated by chlorosulfonic acid. Sulfation of sericin was confirmed by FT-IR and the reaction efficiency was calculated as 44.9%. 1H-NMR suggested that sulfation mainly occurred at serine residues in the sericin molecule. The sulfated sericin was separated in three fractions by…