Materials Literature
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We describe two electrochemical self-assembly processes for producing highly ordered quasi-periodic arrays of quantum dots on a surface. The advantages of these techniques are: (i) they are `gentle' and do not cause radiation damage to nanostructures unlike beam lithography, (ii) they have high throughput and are amen…
Substrate topography in the micrometer range is reviewed as a modifier of the response of cultured cells and of biocompatibility when implanted into tissues. Characterization methods for substrate topography are discussed, including scanning electron microscopy, profilometry, laser scanning, and confocal microscopy. B…
A high catalytic activity towards alkene epoxidation is shown by titanium‐modified MCM41 mesoporous silicas if 2‐methyl‐1‐phenyl‐2‐propyl hydroperoxide (MPPH) is used as oxidant. This first example in which MPPH has been used as an efficient two‐electron oxidizing agent demonstrates that it is a competent replacement…
Collagen in tissues THE ROLE OF COLLAGENCollagen is the Inost abundant protein component of the extracellular matrix (ECM), and provides the insoluble fibres and microfibrils in this complex cOlnposite material.A key role for this collagenous network is to provide a scaffold for cell attachment and rnigration, as welI…
An ultrasonic pulse echo technique was employed to measure the single-crystal elastic constants and their temperature dependence in the vicinity of an intermediate phase transition at 265 K in a ${\mathrm{Ni}}_{2}$MnGa single crystal. The measured elastic constants at 300 K (in units of ${10}^{11}$ dyn/${\mathrm{cm}}^…
We present a dynamic light scattering study on the sol-gel transition of a suspension of disk-shaped colloidal particles in water. We obtain the static and fluctuating part of the scattered intensity, the fraction of frozen-in density fluctuations, and the intermediate scattering function from a local time-averaged me…
Abstract The effect of several chemical treatments, viz. organotitanate, zirconate, silane, and N‐substituted methacrylamide, on the properties of sisal fibers used as reinforcement in unsaturated polyester resin (∼50 vol%) was investigated. An improvement in the properties was observed when sisal fibers were modified…
Phosphophoryns (PPs), a family of Asp and Ser(P)-rich dentin proteins, are considered to be archetypal regulators of several aspects of extracellular matrix (ECM) biomineralization. We have cloned a rat incisor PP gene, Dmp2, from our odontoblast cDNA library and localized it to mouse chromosome 5q21 within 2 centimor…
Despite an interparticle potential consisting of only an infinite repulsion at contact, the thermodynamics and dynamics of concentrated dispersions of hard spheres are not yet fully understood. Colloidal poly-(methyl methacrylate) spheres with a grafted layer of poly-(12-hydroxy stearic acid) (PMMA-PHSA) comprise a co…
We have investigated the magnetoresistance (MR) of the perovskite oxide ${\mathrm{La}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Sr}}_{\mathit{x}}$${\mathrm{CoO}}_{3}$ for 0 \ensuremath{\leqslant}x\ensuremath{\leqslant}0.4 which shows a spin-state transition from low-spin ${\mathrm{Co}}^{\mathrm{III}}$ to high-sp…
One main concern about the use of graphite as a plasma facing material is the enhanced erosion under hydrogen bombardment due to hydrocarbon formation. In view of the lifetime evaluation of plasma exposed carbon components and of impurity production in present and future machines such as ITER, an analytical expression…
The instrument function for energy-dispersive powder diffraction and angular-dispersive powder diffraction is presented. The contribution made by sample absorption is included in the instrument function. Both the equatorial and axial divergence functions are calculated in reflection geometry. The axial divergence func…