Materials Literature
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Chitosan microspheres are used as catalysts for the synthesis of monoglyceride by fatty acid addition to glycidol. Microspheres are obtained by drying gel beads of the natural polymer under supercritical CO2 conditions, which makes the access to the polymer functional groups easy.
Type II synthase (PhaC1(Ps)) for polyhydroxyalkanoate (PHA) from Pseudomonas sp. 61-3 was subjected to an in vitro evolution system including PCR-mediated mutagenesis in order to improve the function of PhaC1(Ps) in terms of its ability to produce poly(3-hydroxybutyrate) [P(3HB)] in recombinant Escherichia coli. Based…
Interlinking 2D azido-bridged and spin-canted antiferro-magnetic layers with semi-rigid organic pillars yields a 3D molecular metamagnet.
In this Perspective, some of the basic principles of ligand design will be described as they apply to the synthesis of metal complexes with liquid crystal properties. Liquid crystal properties of metal complexes are a delicate function of both ligand and metal and examples will be chosen to illustrate this statement.…
Monodisperse hollow silica particles were prepared without using templates via a two-step method in an aqueous solution, were controlled in size and hollow diameter, and were selectively soluble in organic solvents, leading to usefulness in many applications such as coating technology, catalysis, delivery systems, nan…
CdS nanocrystals including nanorods and faceted nanoparticles were prepared via thermolysing cadmium ethylxanthate in hot hexadecylamine (HDA) solution. In order to control the shape and size of the nanocrystals, the influence of reaction conditions (such as reaction temperature, monomer (single-source precursor—cadmi…
The mechanistic cause of enhancement of C3H8-SCR activity by addition of H2 over Ag/Al2O3 was investigated with in-situ FT-IR spectroscopy. Under a flow of NO + C3H8 + O2, nitrates were mainly formed on Ag/Al2O3. An addition of H2 into a C3H8-SCR atmosphere increased the concentration of surface acetate significantly,…
Research Article| January 03, 2003 Silicification: The Processes by Which Organisms Capture and Mineralize Silica Carole C. Perry Carole C. Perry Division of Chemistry, Interdisciplinary Biomedical Research Centre, The Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, United Kingdom Search for other wor…
Atomistic simulations have allowed us to gain fresh insight into the mechanisms of oxygen ion transport in novel apatite silicates, which form part of a new family of ionic conductors for potential fuel cell applications.
For the first time the synthesis of crystallite-embedded turbostratic carbon nitride material (t-CNx) from polymer precursor at atmospheric pressure is reported; the C-N crystallites within the material are in the alpha-C3N4 structure.
The association of acceptor cations (Fe′Ti and Mn″Ti) with oxygen vacancies in Fe- and Mn-doped SrTiO3 single crystals is investigated using in-situ EPR spectroscopy. Effective association enthalpies ΔassH0eff and entropies ΔassS0eff are determined, and ΔassH0eff is found to depend strongly on the dopant concentration…
A one-pot procedure that allows the preparation of 5,10,15-triarylcorroles directly from the condensation of pyrrole and benzaldehydes, avoiding the concomitant formation of the corresponding tetraarylporphyrins, has been developed. This approach is general and allows the preparation of sterically hindered corroles fr…
Redox-related changes in biological properties of copper bis(thiosemicarbazone) radiopharmaceuticals are induced by backbone alkylation. To determine whether these changes are mediated by changes in core structural parameters, eight X-ray structures of variously alkylated complexes were determined. The complexes inclu…
A novel heterospin system, [(CuL)Gd(H2O)3(Fe(CN)6)] x 4H2O, is obtained by reacting the mononuclear complex, [CuL], with gadolinium(III) nitrate, followed by the substitution of the nitrato groups with [Fe(CN)6](3-) ions (L2- = N,N'-propylenedi(3-methoxysalicylideneiminato)).
Multiple-step martensitic transformations in Ni-rich NiTi shape memory alloys have so far been rationalized on the basis of dislocation stress fields, coherency stress fields around Ni 4 Ti 3 precipitates and evolving Ni concentrations between precipitates during ageing. The primary objective of the present paper is t…
Mg–3%Al–1%Zn (AZ31) alloy was subjected to ECAE (Equal Channel Angular Extrusion) processing under various processing conditions. Then tensile tests were carried out at room temperature to investigate the relationship between tensile properties and microstructural parameters that include grain size and the texture gen…
Hall-effect, photoluminescence (PL), and electron paramagnetic resonance (EPR) measurements have been performed in single-crystal ZnO samples annealed in air at 25, 550, 750, and 950 °C, for 30 min each. A 37 meV donor is dominant in the unannealed sample, but nearly disappears during the higher temperature anneals, a…
In this study, 3 types of plasma techniques, i.e. plasma modification, plasma deposition and plasma followed by grafting reaction, are used for the fabrication of tools, medical devices and biomaterials. Depending on purpose, bioadhesion of cells and biomolecules is either looked for or avoided. Since the mechanisms o…
Establishment or maintenance of a persistent infection by Mycobacterium tuberculosis requires the glyoxylate pathway. This is a bypass of the tricarboxylic acid cycle in which isocitrate lyase and malate synthase (GlcB) catalyze the net incorporation of carbon during growth of microorganisms on acetate or fatty acids…
Large-sized, crack-free silica monoliths with highly ordered mesostructure are prepared by a fast and easy way via liquid-paraffin-medium protected solvent evaporation. By employing the inert liquid paraffin as the morphology “protector”, cracks of the materials can be successfully avoided and the processing time can…