Materials Literature
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The study of the process of protein synthesis, which encompasses translation of the genetic code, has been intensively under way for about 4 decades. This chapter summarizes recent studies of the structure and function of ribosomes by a combination of biochemical and X-ray-crystallographic approaches, focusing primari…
Dramatic increases in cps expression correlate with increased capsule synthesis and generally can be ascribed to either of two control points for the regulatory system. Capsule synthesis under all these conditions is completely dependent on RcsB; RcsA appears to act as an accessory factor that allows modulation of Rcs…
This chapter reviews the regulation of the Uhp system, which is a sugar-phosphate transport protein whose expression is induced by external glucose 6-phosphate (Glu6P). The presence of organophosphate transport systems in many gram-positive and gram-negative bacteria suggests that their organophosphate substrates are…
Al doped zinc oxide (AZO) films were prepared by mid-frequency magnetron sputtering for silicon (Si) thin film solar cells. Then, the influence of deposition parameters on the electrical and optical properties of the films was studied. Results showed that high conductive and high transparent AZO thin films were achiev…
The absorption edge shifted to long wavelength direction and short wavelength direction of two opposite experimental conclusions have been reported, when the band-gap and absorption spectra of Nb -doped anatase TiO 2 were studied. In order to solve this contradiction, the electronic structure and the optical property…
The effect of kaolin loading on the viscosity and shear strength of natural-rubber-based pressure-sensitive adhesive was studied using coumarone-indene resin, toluene, and polyethylene terephthalate as tackifier, solvent, and substrate, respectively. Kaolin loading ranged from 10 to 60 parts per hundred parts of rubbe…
Abstract The crystal structure and non-linear optical properties of L-alaninium perrhenate, C3H8NO2+ ReO4 −, are reported. The protonated amino acid and the perrhenate anion have their usual geometries. The three-dimensional hydrogen-bonded network can be seen as a stacking of layers parallel to the (100) planes. Each…
The issues of thermal softening and adiabatic shear failure, in dynamically compressed metals, are revisited through experiments in the Kolsky bar system. Various materials were compressed by single- and multi-step loadings and the results were analysed through a new approach to the issue of instability strain, which…
Abstract Superparamagnetic nanoparticles (MNP) have attracted much interest for medical applications, like magnetic cell separation, magnetic resonance imaging, drug delivery and hyperthermia In this work, 10 nm MNP were functionalized with human α‐MICA antibody, via biotin‐streptavidin conjugation, due to the importa…
By analyzing aerial images, we characterize the lowest order coma aberration measurements for the projection optics of a microlithography exposure apparatus based on scalar diffraction theory. Our developed method for measuring the coma aberration exploits the intensity difference between the sidelobe peaks appearing…
OBJECTIVE: To examine the feasibility and efficacy of using superparamagnetic iron oxide nanoparticles coated with polyethylene glycol-grafted polyethylenimine (PEG-g-PEI-SPION) as a carrier for gene delivery into human adipose derived mesenchymal stem cells (hADMSCs) and in vitro cellular magnetic resonance imaging (…
The crystal structure of a UPRM-5 titanium silicate prepared using tetraethylammonium (TEA + ) has been approximated using a superposition model product of a polymorph stacking and a dual-phase Rietveld refinement method. Na + -UPRM-5 polymorphs were employed to elucidate the level of polymorphism or faulting in the c…
Homopolymer of myristyl acrylate was prepared by microwave assisted free radical polymerization method using BZP as initiator with variation of time at a fixed power without any solvent. Characterization of the polymers was done by IR, NMR, and viscometric analysis. Additive performances of each of them (pour point de…
Rhodium sulfide on carbon support (denoted as Rh2S3/C) was synthesized by refluxing of rhodium chloride (RhCl3) with ammonium thiosulfate. By thermal treatment in Ar, Rh2S3 can be transformed into different phases, such as Rh17S15, Rh3S4 and Rh, which were evident from XRD analysis. The particle size distribution of c…
Two new diamagnetic coordination compounds, [Fe(phen)3][C(CN)3]2, (I), and [Fe(bpy)3][C(CN)3]2·1.5H2O, (II), have been synthesized and characterized by single-crystal X-ray diffraction analysis, and IR and UV-Vis spectroscopy (phen is 1,10-phenanthroline, C12H8N2, and bpy is 2,2'-bipyridine, C10H8N2). Both compounds a…
Low moduli cell culture substrates can be used to apply dynamic mechanical strain to cells, by surface deformation. Understanding the surface interaction with cells is critical to improving cell adhesion and normal growth. A medical grade polyurethane (PU), Chronoflex AL 80A, was modified by oxygen plasma etching and…
Almost three decades after the discovery of high temperature cuprate superconductors, the origin of their high critical temperature remains an enigma. But it is now possible to discuss the 'fermiology' of the cuprates thanks to the discovery of quantum oscillations, which give valuable information about the Fermi surf…
In 1991, Yonath and coworkers, after nearly a decade of pioneering work on the crystallization of ribosomes, showed that it was possible to obtain diffraction to beyond 3 Å from crystals of the 50S subunit of Haloarcula marismortui. This work marked a milestone in ribosome crystallography, because it established that…
An easy protocol for improvement in formation of the photoanode in a dye sensitized solar cell is addressed. Specifically, a novel synthesis for the formation of a TiO 2 precursor: titanium butanediolate, is detailed. This precursor is found to have higher thermal and temporal stability than commercially available TiO…
We present a transistor-based microwave metamaterial exhibiting tunability over a wide range of time scales. By loading a metamaterial with a transistor, we show through theory and simulation that both the resonant frequency and quality factor of the metamaterial can be dynamically tuned with a voltage bias. We demons…