Materials Literature
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The Nd(3+)-Yb(3+) couple was investigated in fluoroindogallate glasses using optical spectroscopy to elucidate the energy transfer mechanisms involved in the downconversion (DC) process. Upon excitation of a Nd(3+) ion by an ultraviolet photon, DC through a three-step energy transfer process occurs, in which the energ…
Many observations of ball lightning report a ball of light, about 10 cm in diameter, moving at about walking speed, lasting up to 20 s and frequently existing inside of houses and even aeroplanes. The present paper reports detailed observations of the initiation or birth of ball lightning. In two cases, navigation cre…
We report the use of ammonia (NH(3)) vapor as a new precursor for nanoscale electron beam induced etching (EBIE) of carbon, and an efficient imaging medium for environmental scanning electron microscopy (ESEM). Etching is demonstrated using amorphous carbonaceous nanowires grown by electron beam induced deposition (EB…
Peptidyl-tRNA hydrolase (Pth) cleaves the ester bond between the peptide and the tRNA of peptidyl-tRNA molecules, which are produced by aborted translation, to recycle tRNA for further rounds of protein synthesis. Pth is ubiquitous in nature, and its enzymatic activity is essential for bacterial viability. We have det…
Extrusion of a clay body is the most applied process in the ceramic industries for manufacturing structural blocks. Nowadays, the assembly of such blocks through a fitting system is gaining attention owing to the saving in material and reducing in the cost of the building construction. However, this fitting system req…
Titanium-doped hafnium oxide films, TixHf1−xO2−δ, have been deposited with a Ti content of x = 0.1 and x = 0.5, by atomic layer deposition. The TixHf1−xO2−δ growth rate is lower compared with the growth rates of the individual binary oxides; however, the composition of the films is unaffected by the reduced growth rat…
Abstract The material behavior of elastic‐plastic zeolite 4A granules has been experimentally studied using compression tests. The influence of particle size and moisture content has been investigated. Furthermore, the specific fracture energy distribution and the distribution of the equivalent breakage velocity at im…
Abstract In this article, we present a method for reducing radar cross‐section (RCS) of a patch antenna in two frequency bands. This method is based on the absorbing metamaterial loaded around the patch exciting source. The metamaterial is composed of double‐square‐loop structure inserted with resistors, which can abs…
The supported lipid bilayer (SLB) is a well-known system for studying the cell membrane and membrane proteins. It is also promising as a platform for studying cell processes: the cell adhesion, the cell membrane receptors, and the intercellular signaling processes. SLBs made of natural lipids appeared to be protein an…
Macromonomers are synthesized from AGET activation of poly( n -butyl acrylate), P( n BuA), synthesized via ATRP. Reactivation of the polymer chains is achieved at 140 °C using Sn(EH) 2 as reducing agent. Under such conditions, P( n BuA) macroradicals undergo fast chain transfer reactions forming midchain radicals, MCR…
PURPOSE: In accurate proton spot-scanning therapy, continuous target tracking by fluoroscopic x ray during irradiation is beneficial not only for respiratory moving tumors of lung and liver but also for relatively stationary tumors of prostate. Implanted gold markers have been used with great effect for positioning th…
Abstract Artificial turf is robust, playable in all weathers and has a long service life. Polyamide (PA) flooring has excellent resilience but provokes abrasion injuries (friction burn); polyethylene (PE) monofilaments are skin‐friendly but tend to permanent deformation. To maximize resilience while minimizing the ris…
BACKGROUND: Occupational health hazards associated with fluoroscopic-based procedures are well known, including a high prevalence of orthopedic problems, and those related to radiation exposure, particularly cancer and cataracts. This article reports the "first-in-man" clinical experience with a novel radiation protec…
Four new steroidal saponins, pariposides A-D (1-4), and two new sterol glycosides, pariposides E-F (5-6), along with eight known steroidal saponins (7-14), two known sterol glycosides (15-16), and two known ecdysteroids (17-18), were isolated from the roots of Paris polyphylla var. yunnanensis. Among them, compounds 1…
This paper reports on an integrated energy harvesting prototype that consists of dispenser-printed thermoelectric energy harvesting and electrochemical energy storage devices. Parallel-connected thermoelectric devices with low internal resistances were designed, fabricated and characterized. The use of a commercially…
We report on high-resolution differential conductance experiments on nanoscale superconductor-ferromagnet tunnel junctions with ultrathin oxide tunnel barriers. We observe subgap conductance features that are symmetric with respect to bias and shift according to the Zeeman energy with an applied magnetic field. These…
Inorganic fullerene-like (IF) nanoparticles made of metal dichalcogenides have previously been recognized to be good friction modifiers and anti-wear additives under boundary lubrication conditions. The tribological performance of these particles appears to be a result of their size, structure and morphology, along wi…
An investigation of the existence of predominant frequency, fp (or frequencies), and the ability to predict critical pavement responses in asphalt layers using those predominant frequencies has been presented. The study used an extensive database of computed pavement response histories of four different asphalt paveme…
Alginate/chitosan/alginate (ACA) hydrogel microcapsules were modified with methoxy poly(ethylene glycol) (MPEG) to improve protein repellency and biocompatibility. Increased MPEG surface graft density (n(S)) on hydrogel microcapsules was achieved by controlling the grafting parameters including the buffer layer substr…
The development of organic semiconducting nanowires that act as charge carrier transport pathways in flexible and lightweight nanoelectronics is a major scientific challenge. We report on the fabrication of fullerene nanowires that is universally applicable to its derivatives (pristine C(60), methanofullerenes of C(61…