Materials Literature
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Hydrogen bonds between backbone amide groups of enzymes and their substrates are often observed, but their importance in substrate binding and/or catalysis is not easy to investigate experimentally. We describe the generation and kinetic characterization of a backbone amide to ester substitution in the orotidine 5'-mo…
We investigate the crystallization of a single, flexible homopolymer chain using transition path sampling. The chain consists of N identical spherical monomers evolved according to Langevin dynamics. While neighboring monomers are coupled via harmonic springs, the non-neighboring monomers interact via a hard core and…
The transport and magnetic properties of the tetragonal Fe[Formula: see text]S were investigated using magnetoresistivity and magnetization within [Formula: see text] K, [Formula: see text] 70 kOe and [Formula: see text] 3.0 GPa. In addition, room-temperature x-ray diffraction and photoelectron spectroscopy were also…
One-dimensional (1D) (spherically averaged) powder diffraction diagrams are commonly used to determine the degree of cellulose crystallinity in biomass samples. Here, it is shown using molecular modeling how disorder in cellulose fibrils can lead to considerable uncertainty in conclusions drawn concerning crystallinit…
To improve the thermal conductivity of polymeric composites, the numerous interfacial thermal resistance (ITR) inside is usually considered as a bottle neck, but the direct measurement of the ITR is hardly reported. In this paper, a sandwich structure which consists of transducer/high density polyethylene (HDPE)/sapph…
Nickel Titanium (NiTi) alloys possess special mechanical properties and good biocompatibility hence used as base material for the production of vascular stents. Normally, vascular stents are machined from NiTi tubes, using laser cutting processes. Braiding is a promising alternative for the machining of certain NiTi s…
This introductory paper aims at summarizing some problems and state-of-the-art techniques encountered in image processing for material analysis and design. Developing generic methods for this purpose is a complex task given the variability of the different image acquisition modalities (optical, scanning or transmissio…
Based on the measured voltammograms, the corrosion potentials and corrosion current densities of Mo, Re, and several their alloys in the NaCl solutions were determined by the method of Tafel extrapolation. The dependences of E corr and i corr on the alloy composition, including the corresponding values for the metals…
Titanium is most likely to play more important role in future civil applications. Its excellent properties such as: low density, high mechanical strength and good corrosion resistance give it some advantages and open the way for new applications both in modern technology and civil engineering. In many ways (e.g. speci…
Root extract of Coptis chinensis (CCR) was used and its inhibition efficiency on corrosion of Al alloy in 3.5 wt.% NaCl was investigated through surface morphology and electrochemical techniques. The Nyquist diagrams containing the extract with different concentrations showed increase in Rct values, thus increasing in…
The optical-frequency magnetic and electric properties of cyclic aromatic plasmon-supporting metal nanoparticle oligomers are explored through a combination of scanning transmission electron microscopy (STEM)/electron energy-loss spectroscopy (EELS) simulation and first-principles theory. A tight-binding-type model is…
OBJECTIVE: The objective of the present study is to investigate the reinforcement effect of polymer-grade montmorillonite (PGN nanoclay) on physical properties of glass ionomer cement (GIC). MATERIALS AND METHODS: The PGN nanoclay was dispersed in the liquid portion of GIC (HiFi, Advanced Healthcare, Kent, UK) at 1%,…
In the present work the BaZr 0.8 Y 0.2 O 3 − δ samples were synthesized by traditional ceramic (solid-state method), citrate-nitrate methods as well as co-precipitation of hydroxides. Among them, the citrate-nitrate combustion method was found to be the optimal one because the obtained powder calcined at 1150°C is sin…
Advances in nanoscience have allowed scientists to incorporate new nanomaterials in biosensing platforms. Carbon nanotubes are nanomaterials that facilitate the charge transfer between the bioelement and the transducer. Electrochemical impedance spectroscopy is a useful technique for the modified surface characterizat…
Pyrochlore-supergroup minerals containing relatively high Si concentration are quite common in various geochemical parageneses, e.g., carbonatites, alkaline syenites, pegmatites. However, the role of Si and the mechanism of its incorporation into the structure of these minerals, although widely discussed, have not bee…
ABSTRACT Real uniform dispersion of barium titanate, BaTiO3, submicrometric particles within Poly(vinylidene fluoride), PVDF, was achieved to understand induced structure, morphology, and crystallization process of the polymer. Composites with uniform dispersions of BaTiO3 particles within PVDF were accomplished for t…
The ZK60 magnesium alloy has been modified by Fe ion implantation and deposition with a metal vapor vacuum arc plasma source. The surface morphology, phase constituent and elemental distribution are determined by scanning electron microscopy, transmission electron microscopy, X-ray diffractometer and Auger electron sp…
Synthesis of two bimodal imaging agents consist of a hydrophobic zinc(II) tetrapentafluorophenylporpholactol core and a β-substituted hydrophilic Gd ( III ) DO3A (ZnLGd539) or DOTA (ZnLGd595) like moiety has been described (DO3A = 1,4,7,10-tetraazacyclododecane-1,4,7-triacetic acid, DOTA = 1,4,7,10-tetraazacyclododeca…
A tray-shaped PdII3AuI3 complex (1) is prepared from 3,5-bis(3-pyridyl)pyrazole by means of tricyclization with AuI followed by PdII clipping. Tray 1 is an efficient scaffold for the modular assembly of [3×n] AuI clusters. Treatment of 1 with the AuI3 tricyclic guest 2 in H2O/CH3CN (7:3) or H2O results in the selectiv…
The magnetoelectric composites (x)Ni0.75Zn0.25Fe2O4-(1-x)Pb0.9(La0.96Sr0.04)0.1(Zr0.65Ti0.35)0.975O3(for x variations 0, 0.20 and 1.0) where Ni0.75Zn0.25Fe2O4i.e. NZF is ferrite phase and Pb0.9(La0.96Sr0.04)0.1(Zr0.65Ti0.35)0.975O3i.e. PLSZT is ferroelectric phase, were synthesized via solid state reaction method. The…