Materials Literature
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Cell dynamics simulations are a powerful tool to simulate kinetic processes in phase separating systems. Here we review the technique and its application to block copolymers. Its advantages and disadvantages compared to other simulation methods for block copolymer structure and dynamics are reviewed. Results on the dy…
An overview about the homogeneous and heterogeneous methods of synthesizing silylating agents and applications of the organofunctionalized silica-gel samples was explored. The pendant molecules attached covalently to the inorganic surface displayed important properties to act as sequestrating agents for metals in aque…
Using 2-hydroxyethyl α-bromoisobutyrate as initiator, atom transfer radical polymerization (ATRP) of tert-butyl acrylate leads to poly(tert-butyl acrylate) (PtBA) with a hydroxyl group at one and a bromine atom at the other end. Esterification of the hydroxyl group of these heterotelechelic polymers with acryloyl chlo…
Dislocations have been introduced in SrTiO3 by Vickers indentation at room temperature and analysed by transmission electron microscopy. The slip systems in SrTiO3 were identified as ⟨110⟩-{110}. ⟨110⟩ dislocations are dissociated into two partial dislocations. The stacking-fault energy γSF was determined to be 136 ±…
We demonstrate the enhancement of diamond nucleation through the use of the equilibrium forces at the solid-liquid-gas interface on a substrate wetted with droplets of an oil of low vapor pressure. Such a process is shown to produce well-faceted grains with densities of roughly 107 nuclei cm−2 (boundary), 105 nuclei c…
Enzymatic degradation and polymerization using an enzyme were analyzed with respect to the establishment of a sustainable chemical recycling system for poly(ε-caprolactone) (PCL) which is a typical biodegradable synthetic plastic. As the typical example, the enzymatic degradation of PCL having an Mn of 110 000 using l…
The use of normal Raman spectroscopy and surface-enhanced Raman spectroscopy (SERS) of cationic-coated, silver substrates to detect nitrate and sulfate ions in aqueous environments is examined. For normal Raman spectroscopy using near-infrared excitation, a linear concentration response was observed with detection lim…
Optically active 1,1′-binaphthyl molecules have been used to construct novel chiral dendrimers and linear polymers. Efficient light harvesting effects of the dendrimers have been observed. They have shown enantioselective fluorescence responses in the presence of chiral amino alcohol quenchers. They are potentially us…
Deoxythymidine diphosphate (dTDP)-4-keto-6-deoxy-d-hexulose 3, 5-epimerase (RmlC) is involved in the biosynthesis of dTDP-l-rhamnose, which is an essential component of the bacterial cell wall. The crystal structure of RmlC from Methanobacterium thermoautotrophicum was determined in the presence and absence of dTDP, a…
A stable icosahedral phase has been found in a series of Cd 65 Mg 20 RE 15 (RE=Y, Nd, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) alloys. These icosahedral alloys have quasilattice parameters from 0.5571 to 0.5799 nm. Electron diffraction study confirmed that the icosahedral quasicrystals have a primitive icosahedral structur…
Using classical molecular dynamics simulation and the empirical bond-order Tersoff–Brenner potential for the carbon–carbon interaction the phonon density of states of single-wall carbon nanotubes (SWNT) of various chiralities has been studied as a function of temperature and nanotube diameter. The calculated frequenci…
The origin and evolution of multicellular metazoa was accompanied by the appearance of extracellular matrix. The demineralized extracellular matrix of bone is enriched in morphogenetic proteins that induce bone. Bone morphogenetic proteins (BMPs) are intimately bound to collagens. BMP-4 has high affinity for type-IV c…
Three types of covalently crosslinked assemblies consisting of multiple (1) molecular layers of human serum albumin (HSA); (2) alternating layers of HSA and unfractionated heparin; and (3) alternating layers of HSA and partly depolymerized heparin fixed with one end to HSA were prepared on various surfaces. Adsorption…
Piezoelectric ceramics are potential high-power electroacoustic sources, and have been studied for many years. However, when these devices are driven under high-level vibration, the electromechanical characteristics depart significantly from the conventional linear piezoelectric relationships due to the loss and nonli…
Porous CaZrO 3 /MgO composites with a uniform three‐dimensional (3‐D) network structure have been successfully synthesized using reactive sintering of highly pure mixtures of natural dolomite (CaMg(CO 3 ) 2 ) and synthesized zirconia powders with LiF additive. Equimolar dolomite and zirconia powders doped with 0.5 wt%…
The frequency dependent ultrasonic velocities (both longitudinal and shear) and attenuation in BaTiO3 doped (80V2O5–20PbO + xBaTiO3) oxide (VPB) glasses (for x = 0, 1, 5, 10, and 15 wt% of the base glass) have been measured using pulse echo overlap method at room temperature. From the measured velocity, density and at…
As magnesium is an essential element, magnesium implants can be expected to be safety though its corrosion resistance is low To understand its corrosion behavior in vitro circumstance, for example Hank's solution and to improve its corrosion resistance, the present study was carried out. Specimens of 10 X 20 X (2-4) m…
The creep behavior of a commercial grade of Si 3 N 4 was studied at 1350° and 1400°C. Stresses ranged from 10 to 200 MPa in tension and from 30 to 300 MPa in compression. In tension, the creep rate increased linearly with stress at low stresses and exponentially at high stresses. By contrast, the creep rate in compres…
Polymorphic behavior (i.e., the development of α and β forms) of melt-crystallized syndiotactic polystyrene, sPS, has been studied by structure analysis of FTIR (Fourier transform infrared spectroscopy), WAXD (wide-angle X-ray diffraction), and ED (electron diffraction) as well as thermal analysis of DSC (differential…
We report a molecular dynamics simulation of selenium, described by a three-body interaction. The temperatures ${T}_{g}$ and ${T}_{c}$ and the structural properties are in agreement with experiment. The mean nearest neighbor coordination number is 2.1. A small prepeak at about $1 {\AA{}}^{\ensuremath{-}1}$ can be expl…