Materials Literature
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Recent years have seen a considerable development in the availability of single-crystal diffraction facilities with synchrotron radiation for use in non-biological crystallography, with access to several suitable beam-lines around the world. These can markedly extend the range of materials for which a full crystal str…
We have previously demonstrated that liposome encapsulation of doxorubicin (DOX) can alleviate adverse interactions with non-encapsulated DOX and the cyclosporine multidrug-resistant (MDR) modulator Valspodar. We have now investigated the behavior of different liposomal DOX formulations in MDA435LCC6/MDR-1 human breas…
The adsorption of ethylbenzene and styrene on well ordered epitaxial iron oxide model catalyst films with different stoichiometries was investigated using near-edge X-ray absorption fine structure spectroscopy (NEXAFS). On the iron-terminated Fe3O4(111) and α-Fe2O3(0001) surfaces chemisorption of ethylbenzene and styr…
Carboxylated nitrile rubber (XNBR) neutralized by metal oxide forms an ionic elastomer (ionomer) due to formation of ionic clusters by the metal carboxylated salt. Cluster formation in carboxylated nitrile rubber by metal oxide, mainly zinc oxide (ZnO), has been studied by infrared analyses. Two modes of plasticizatio…
The goal of this study was to improve our understanding of diamond growth reactors. Direct relationships were set up between key parameters at a microscale level and diamond film characteristics. The coupled action of plasma variables, such as microwave power density, substrate temperature, and percentage of methane,…
Characterization of Eu‐Doped Y 2 O 3 Nanoparticles Prepared in Nonionic Reverse Microemulsions in Relation to Their Application for Field Emission Display, Lee, Myung Han, Oh, Seong Geun, Yi, Sung Chul, Seo, Do Seok, Hong, Jin Pyo, Kim, Chae Ok, Yoo, Young Kil, Yoo, Jae Soo
The blocked isocyanate group (BHI) was synthesized to improve the storage stability of HI (2-hydroxyethyl methacrylate combined with isophorone diisocyanate) and characterized by Fourier transform infrared spectroscopy (FTIR). High-density polyethylene grafted with the blocked isocyanate group (HDPE-g-BHI) was used as…
Y2O3 ∶ Eu3+ phosphor particles were obtained by calcination of composite Y–Eu oxalate particles prepared in emulsion liquid membrane (ELM, water-in-oil-in-water (W/O/W) emulsion) systems. In the ELM systems, composite Y–Eu particles could be prepared by transporting either Y3+ and Eu3+ ions or oxalate ions from the ex…
We have carried out ab initio molecular orbital calculations on four isomers of ${\mathrm{Si}}_{9}{\mathrm{O}}_{25}{\mathrm{H}}_{14}$ modeling the local structure of ${\mathrm{SiO}}_{2}$ glass at the Hartree-Fock level. These clusters consist of two-, three-, four-, five-, and/or six-membered silica rings. The strain…
The mechanism of the acoustoplastic effect is discussed which arises when an oscillatory stress of an acoustic frequency is superimposed during quasi-static deformation of a crystal. The kinetics of the acoustoplastic effect and its dependence on the amount of plastic deformation, amplitude of acoustic-frequency stres…
We present results in the final part of a three-part study employing standard test data (STD) to estimate errors in peak parameters derived from data analysis procedures used in x-ray photoelectron spectroscopy (XPS). The XPS-STD are simulated doublet and singlet XPS spectra based on spline polynomial models of measur…
Vinylbenzyl chloride (VBC) has been used as a coupling agent in Convergent Living Anionic Polymerization to produce polymers with dendritic branching. The slow addition of a stoichiometric amount of VBC to living polystyrene chains allows the coupling to proceed through macromonomer formation followed by vinyl additio…
Catalytic synthesis and transmission electron microscopy (TEM) of multi-wall carbon nanotubes are presented. Silica, zeolite and alumina supported cobalt catalysts were prepared by different methods (impregnation and ion-adsorption precipitation) and were used to produce nanotubes. The synthesis was carried out in a f…
Polycrystalline solid solutions of phosphate and vanadate calcium apatites were synthesized and studied by XRD, XPS, 31P and 51V NMR, FTIR and UV spectroscopies. Homogeneous distributions of vanadium within the solid and the surface were obtained. While 51V NMR spectra suggest an axial symmetry of the vanadate group,…
Two multicomponent Zn-tetraphenylporphyrin (ZnTPP) based building blocks have been synthesized for designing microporous crystalline solids. Reactions of ZnTPP with 4,4′-bipyridine (4,4′-bpy) in two different molar ratios gave two coordination complexes namely [(ZnTPP)3{μ-4,4′-bpy}2] I and [(ZnTPP)2{μ-4,4′-bpy}] II. C…
A series of Mn porphyrins bearing one to eight β-nitro substituents were synthesized in high yield in three steps by using a new general method for selective nitration of a Zn(meso-tetraarylporphyrin); this Mn porphyrin series exhibits a remarkably wide span of Mn(III)/Mn(II) redox potentials from −290 to + 1150 mV (v…
Nylon 11 coatings filled with nanosized silica and carbon black have been produced using the high velocity oxy-fuel (HVOF) combustion spray process. The physical properties and microstructure of coatings produced from nylon 11 powders with starting particle sizes of 30 and 60 μm have been evaluated as a function of th…
Structural modifications of a commercial polypropylene (PP) sample are studied by IR spectroscopy. Aging this sample under an ambient atmosphere with or without the presence of ambient light shows the oxidation process to be the most predominant. Spectral analysis reveals that the commercial sample is isotactic and al…
Novel silica materials bearing single or multiple (lotus-shaped) hollow fiber structures with 5–10 nm inner diameters and a spherical structure were created using sugar-integrated organogelators (1–4) as templates by sol–gel polymerization of TEOS.
We prepared two kinds of sulfated silk fibroins, SclFib30 and SclFib31, which contain different amounts of sulfate. These sulfated silk fibroins have anti-HIV-1 activity in vitro, apparently due to interference with the adsorption of virus particles to CD4+ cells, and completely blocked virus binding to the cells at a…