Materials Literature
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To estimate numerically multidimensional director configurations in a liquid crystal cell, it is important to use the Q tensor representation of the strain free energy because it solves the problem of the difference between the directors, n and - n , in the Frank-Oseen free energy representation. In this paper, we dis…
The constrained dye 3 was prepared and shown to have a sharper, red-shifted, and more intense fluorescence emission than the 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY®) dye 2 in which the aryl groups can rotate freely.
We report the latest release (version 1.4) of the CATH protein domains database (http://www.biochem.ucl.ac.uk/bsm/cath). This is a hierarchical classification of 13 359 protein domain structures into evolutionary families and structural groupings. We currently identify 827 homologous families in which the proteins hav…
Much progress had been made during the last two decades in acoustic and optical methods for measuring charge distributions in dielectrics. A review on this topic is given, which mainly covers the past research activities associated with that at our laboratory. For acoustic methods, we will discuss andoompare the pulse…
We extend Karma and Rappel's improved asymptotic analysis of the phase field model to different diffusivities in solid and liquid. We consider both second-order "classical" asymptotics, in which the interface thickness is taken much smaller than the capillary length, and the new "isothermal" asymptotics, in which the…
A simple preparative method for mesoporous carbons with high pore volumes using surfactant stabilized silica particles as templates is reported.
Nanocrystalline aluminate spinels with cobalt, nickel or copper as bivalent cations have been prepared in different particle sizes using single-source heterometal alkoxides of the type [M{Al(OR) 4 } 2 ] (M II =Co, Ni, Cu; R=Pr i , Bu t ) in a microemulsion assisted sol-gel process. The compatibility of the metal stoic…
A new smectic type mesophase without in-plane order is presented which is formed by nitro substituted banana-shaped compounds. The structure of this phase is not yet known in detail. The growth of germs and also the textures point to a helicoidal structure. The helical structure is obviously the result of the chiralit…
Density functional calculations have been performed to study the structure and energetics of mainly neutral Aln with n up to 153. Clusters up to n=15 have been investigated systematically, in part by simulated annealing techniques. No pronounced islands of stability are found in this range although Al7 and Al13 are of…
The dicyanamide anion has been observed to adopt two bridging co-ordination modes (µ and µ3) in α-Mn(dca)2, [Mn(dca)2(H2O)2]·H2O, [Mn(dca)2(C2H5OH)2]·(CH3)2CO, [Fe(dca)2(CH3OH)2] and [Mn(dca)2(L)2] [L = py, CH3OH or DMF; dca = dycanamide N(CN)2–], and generates weak ligand fields thus stabilising high spin configurati…
The migration of cells over substrata is a fundamental and critical function that requires the co-ordination of several cellular processes which operate in a cycle. At the level of the light microscope, the cycle can be divided into five steps: (1) extension of the leading edge; (2) adhesion to matrix contacts; (3) co…
Hyaluronic acid and alginic acid, examples of hydrophilic polysaccharides whose biological and technological properties are deeply related to strong interaction with water, have been coupled to substrate surfaces. These coatings can prevent mammalian cells adhesion and greatly reduce bacterial cells adhesion in vitro…
Strain versus field measurements for a ferromagnetic shape memory alloy in the NiMnGa system demonstrate the largest magnetostrictive strains to date of nearly 1.3%. These strains are achieved in the martensitic state through field-induced variant rearrangement. An experimental apparatus is described that provides bia…
A chiral catalyst from the ligand 1,1′-bis(diphenylphosphino)ferrocene (dppf) anchored to the inner walls of the mesoporous support MCM-41 and co-ordinated to PdII has been shown to exhibit a degree of regioselectivity and enantiomeric excess, in the allylic amination of cinnamyl acetate, which is far superior to that…
After a brief introduction to the dynamics of supercooled liquids, we discuss some of the advantages and drawbacks of computer simulations of such systems. Subsequently we present the results of computer simulations in which the dynamics of a fragile glass former, a binary Lennard-Jones system, is compared to that of…
The anticancer drug, adriamycin (ADR), was incorporated by physical entrapment into polymeric micelles for selective delivery to a murine solid tumor colon adenocarcinoma 26 (C 26). In vivo antitumor activity of ADR was greatly enhanced by this incorporation into polymeric micelles. Using one polymeric micelle deliver…
This paper describes the development of a computer model for simulating the transient operation of a tubular solid oxide fuel cell (SOFC). The model includes the electrochemical, thermal, and mass flow elements that affect SOFC electrical output. The electrochemical and thermal parts of the model were developed and ve…
Intercalation and supramolecular assembly of layered inorganic compounds represents an attractive route to polyurethane nanocomposites (see Figure for a schematic representation). The authors used a layered silicate, synthetic fluoromica, as the inorganic compound in this study. The nanocomposites are reinforced by me…
Highlights of new findings in electron transfer studies, in which elegant synthetic model systems were used to address important fundamental questions, are briefly described. The selected examples include: (i) efficient long distance electron transfer mediated by hydrogen bonds; (ii) energy and electron transfer throu…
The influence of transition element (TE) doping on the magnetotransport properties of ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{MnO}}_{3}$ is studied for the entire transition element series ($\mathrm{T}\mathrm{E}=\mathrm{C}\mathrm{r},$ Fe, Co, Ni, Cu, Zn) for a fixed (5% at Mn sites) dopant concentration. The s…