Materials Literature
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Abstract This study is about polyurea prepolymer, which was synthesized from the extender ( N ‐(2‐hydroxyethyl) ethylene diamine, HEDA or ethylene diamine, EDA) with 4,4′‐diphenylmethane diisocyanate (MDI), as an intercalative agent to intercalate the organic modified montmorillonite clay. Then, it is further reacted…
Abstract Copolymers of methyl methacrylate (MMA) with 2,3,5,6‐tetrafluorophenyl methacrylate (TFPMA), pentafluorophenyl methacrylate (PFPMA), and 4‐trifluoromethyl‐2,3,5,6‐tetrafluorophenyl methacrylate (TFMPMA) were investigated. All the three systems showed a random copolymerization character. The composition, glass…
In this paper, the paper discussed the emission of visible light by a monolithically integrated silicon diode under reverse bias. The emission of light is achieved using a special defect-engineered buried layer. The light is emitted as punctiform sources by the defects located at the p-n junction of the reverse-biased…
The subject of nephrogenic systemic fibrosis (NSF), first addressed in the radiological community in this journal a few months ago [1], is a fast-moving topic with new details arising almost every day. NSF is a rare, debilitating, and sometimes fatal condition that only occurs in patients with severe renal impairment.…
Abstract The nano‐SiO 2 particles were compounded into soy protein isolated (SPI) matrix to produce a series of reinforcing nanocomposite sheets by compression‐molding. Except for the expected increase of strength and modulus, the elongation was also enhanced when the nano‐SiO 2 content was lower than 8 wt %. Moreover…
Using molecular dynamics simulation we investigate the dynamics in a two-dimensional binary mixture at a low temperature and at high densities. We increase the size ratio of the diameters of the two components or the fraction of the larger particles. Then changeovers occur from polycrystal to glass with proliferation…
The application of a modified Simon-Glatzel-type relation [Z. Anorg. Allg. Chem. 178, 309 (1929)] for the pressure evolution of the glass temperature is presented, namely, Tg(P)=Tg0[1+DeltaP/(pi+Pg0)]1/bexp[-(DeltaP/c)], where (Tg0,Pg0) are the reference temperature and pressure, DeltaP=P-Pg0, -pi is the negative pres…
Abstract Ligating properties of a tetradentate ligand 2‐{bis[(3,5‐di‐ tert ‐butyl‐2‐hydroxybenzyl)amino]methyl}tetrahydrofuran,H 2 L, with [O,O,N,O]‐donor atoms towards Cu II and Fe III are described. The ligand H 2 L yields both mononuclear LFe III (acac) ( 1 ) and dinuclear [L 2 Fe III 2 (μ‐OCH 3 )‐(μ‐OH)] ( 2 ), [L…
The electronic structure of sodium tungsten bronzes, ${\mathrm{Na}}_{x}\mathrm{W}{\mathrm{O}}_{3}$, for full range of $x$ is investigated by high-resolution angle-resolved photoemission spectroscopy (HR-ARPES). The experimentally determined valence-band structure has been compared with the results of ab initio band-st…
We present a 3-D model for calculating magnetic fields in a power transformer and the effective parameters (inductance and resistance) of its windings. The transformer is representative of large transformers with power ratings ranging from hundreds of kilovolt amperes to hundreds of megavolt amperes. The model account…
Arg-Gly-Asp (RGD) has been widely utilized to increase cell adhesion to three-dimensional scaffolds for tissue engineering. However, cell seeding on these scaffolds has only been carried out statically, which yields low cell seeding efficiencies. We have characterized, for the first time, the seeding of rat mesenchyma…
Abstract Multiwalled carbon nanotubes (MWNT) were functionalized with segmented polyurethanes (PU) by the “grafting to” approach. Raman and X‐ray photoelectron spectroscopy (XPS) spectra show that the sidewalls of MWNTs have been functionalized with acid treatment, and the amount of COOH increases with increasing acid…
Bi ions of multiferroic $\mathrm{Bi}\mathrm{Mn}{\mathrm{O}}_{3}$ were replaced with La ions in order to induce an overlap of the ferroelectric and ferromagnetic transitions in temperature and thus enhance the interproperty coupling. Twenty percent La-doped $\mathrm{Bi}\mathrm{Mn}{\mathrm{O}}_{3}$ in thin-film form sho…
Lantibiotic synthetases catalyze the dehydration of Ser and Thr residues in their peptide substrates to dehydroalanine (Dha) and dehydrobutyrine (Dhb), respectively, followed by the conjugate addition of Cys residues to the Dha and Dhb residues to generate the thioether cross-links lanthionine and methyllanthionine, r…
In the past 25 years, several efforts have been focused on developing vascular substitutes showing long-term patency when implanted in humans. In this study, we present our last findings in an ongoing project aiming to develop a tissue-regenerated blood vessel from collagen-based scaffolds. A collagen-based scaffold w…
We employ molecular dynamics simulations to explore the influence that the surface of a free-standing polymer film exerts on its structural relaxation when the film is cooled toward the glass transition. Our simulations are concerned with the features of a coarse-grained bead-spring model in a temperature regime above…
Turning genes on with light: Photochemical control of gene expression is a versatile tool for the elucidation of biological processes and the programming of new biological functions. Activation of protein expression in prokaryotic cells through light irradiation is achieved through a photocaged small molecule. Spatiot…
In ultra-high molecular weight polyethylene (UHMW-PE), it is possible to obtain single chain forming single crystals, where chains are adjacently re-entrant. Depending on the heating rate, it is feasible to melt these crystals either by simple consecutive detachment of chain stems from the crystalline substrate or by…
Fluorite-type Ce0.5Zr0.5O2 and Ce0.5Hf0.5O2 have been synthesized by a solution combustion route, and their oxygen release and reduction have been investigated up to 850 degrees C. On reduction, the zirconium system forms two pyrochlore phases, Ce2Zr2O7 (pyrochlore-I) and Ce2Zr2O6.2 (pyrochlore-II), while the hafnium…
The relaxation processes of water mixtures of glycerol, ethylene glycol, ethylene glycol oligomers with two to six repeat units, poly(ethylene glycol) 400 and 600, fructose, and propanol have been studied by broadband dielectric spectroscopy at different water contents in the frequency range 10 µHz–20 GHz and in the t…