Materials Literature
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Morphological studies at the light microscopy (LM) and scanning electron microscopy (SEM) levels of selected fragilarioid diatoms within the genus Staurosirella Williams et Round occurring in North American streams and rivers are presented herein. The studied samples were collected by the U.S. Geological Survey's Nati…
Abstract Large‐scale synthesized single‐walled carbon nanotubes (SWNT) prepared by electric arc discharge method and a mixture of NiO and Y 2 O 3 as catalyst have been used as electrode materials for supercapacitors. N 2 adsorption/desorption measurement shows that the SWNT is a microporous and mesoporous material wit…
In this study, a number of photoconductive photodetectors made from GaSe1−xSx (0⩽x⩽1) series layered semiconductors are presented, which are suitable for the detection of energies in the range of visible to ultraviolet (UV). Each photodetector consists of a gallium chalcogenide photoconductor and an electronic amplifi…
A zymogen-derived protein, pepsin, appears to be incapable of folding to the native state without the presence of the prosegment. To better understand the nature of the irreversible denaturation of pepsin, the present study reports on the characterization of the stability and low-resolution tertiary and secondary stru…
Two full-scale isolation re-centring devices, embodying NiTi Shape Memory Alloy elements, were designed and manufactured as the final product of a European research project for the exploitation of SMA's in the seismic protection of structures (MANSIDE Project). The devices were subjectod to several experimental tests…
Freshly isolated porcine hepatocytes are a very attractive cell source in the cell-based therapies to treat liver failure because of unlimited availability. However, due to the loss of hepatocyte functions in vitro, there is a need to develop a functional culture system to keep the cells metabolically active. Here we…
In this paper, we summarize the results of an extensive investigation on the properties of MOS-type light-emitting devices based on silicon nanostructures. The performances of crystalline, amorphous, and Er-doped Si nanostructures are presented and compared. We show that all devices are extremely stable and robust, re…
The programming characteristics of a phase-change memory (PCM) cell with a chalcogenide layer contacted by a resistive heater are investigated by finite element modelling. As analyzed in this study, the characteristics are markedly affected by the resistivity of the phase-change chalcogenide material. A higher reset c…
ZnO varistors are nonlinear resistors used as surge arresters in power transmission and distribution for the protection of electronic devices. Electrical characteristics of these materials have been extensively studied, but their mechanical behavior is not completely understood. It has been suggested that the breakdow…
In symmetric polystyrene- block -poly(methyl methacrylate) (PS- b -PMMA) diblock copolymer thin films, lithium−PMMA complexes were formed with the addition of lithium chloride (LiCl), significantly increasing both χ and dielectric constant. These led to a transition in the kinetic pathway of the orientation of lamella…
Hollow glass microspheres coated with thin Ni films of various thicknesses (about 50–250nm) were obtained by electroless plating technique. The resultant magnetic microspheres had very low densities (∼0.39–1.28gcm−3) and low coercivities (<40Oe). As-plated films comprised of nanocrystallites embedded in amorpho…
We have prepared new all-organic ferroelectric liquid crystalline materials containing a polar and dichiral cyclic-nitroxide unit within the rigid core. These compounds show distinct ferroelectricity in SmC* phases. The spontaneous polarization (Ps) has been measured by the triangular wave method and the tilt angle ha…
The structural dynamics of the ring-opening reaction in a photochromic indolylfulgimide, a reversible, ultrafast photoswitch, is investigated by ultra-broadband time-resolved vibrational spectroscopy. The experimentally observed vibrational modes of the indolylfulgimide photoisomers C and E are assigned to normal mode…
Automated electron backscatter diffraction (EBSD) or orientation imaging microscopy (OIM) has become a common analytical tool for the statistical characterisation of grain boundaries in polycrystalline materials. However, as such studies have become more tractable with the advances in EBSD technology some critical com…
Bi 3.15 Nd 0.85 Ti 3 O 12 (BNT0.85) thin films with (100) [α(100)=87.8%], (117) [α(117)=77.1%], and (001) [α(001)=98.8%] preferred orientations were deposited on Pt(100)∕TiO2∕SiO2∕Si substrates using a metal organic decomposition process. The remanent polarization of (100)-predominant BNT0.85 film is about 50% and thr…
Pulse proteolysis exploits the difference in proteolytic susceptibility between folded and unfolded proteins for facile but quantitative determination of protein stability. The method requires only common biochemistry and molecular biology lab equipment. Pulse proteolysis also can be used to determine the affinity of…
A single crystal of N -benzyl 2-methyl-4-nitroaniline (BNA) whose dimensions were 8×10 mm (diameter × length) was grown using a vertical Bridgman method with sufficient optical transparency for spectroscopic use. Polarized reflection spectra of the crystal were measured in order to determine its linear optical paramet…
A Reply to the Comments by Silvina Cerveny, Juan Colmenero, and Angel Alegria; and Jan Swenson.Received 7 November 2005DOI:https://doi.org/10.1103/PhysRevLett.97.189803©2006 American Physical Society
After synthesis and folding, proteins undergo many post-synthetic modifications, including cleavage, oxidation, glycosylation, methylation, racemization, phosphorylation, and deamidation. Of these modifications, non-enymatic deamidation is the most prevalent. Each asparaginyl and glutaminyl residue in a protein is a m…
Raman spectra of synthetic HfSiO 4 were determined to pressures of 38.2 GPa. Changes in the spectra indicate that HfSiO 4 undergoes a room-temperature phase transition from the hafnon structure (I4 1 /amd space group) to the scheelite structure (I4 1 /a space group) at a pressure of ~19.6 GPa. Upon release of pressure…