Materials Literature
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Several empirical assumptions deriving from observations and measurements of the physical processes are involved in the modeling of Solid Oxide Fuel Cells (SOFCs). An insight of the main models proposed in the literature is given to present the characteristics and limits of these assumptions for the various existing c…
This article introduces new space charge measurement systems developed in Japan using the pulsed electroacoustics (PEA) method. The new methods include two types of 3-D systems, two types of transient systems for extremely high or low temperature, a small PEA unit for a portable system, and a mountable PEA unit that c…
Silk proteins were isolated from the cocoons of the nonmulberry silkworm, Philosamia ricini. Three polypeptides of 97, 66, and 45 kDa were identified. The 66-kDa molecule represented sericin, whereas the 97-kDa and the 45-kDa polypeptides linked together through a disulfide bond constituted the fibroin protein. Antibo…
This study investigates the molding characteristics and mechanical properties of injection-molded foaming polypropylene (PP) parts and coinjection-molding PP parts for foaming core material embedded in nonfoaming skin material. Effects of processing parameters including injection-velocity, melting temperature, mold te…
Covers advancements in spacecraft and tactical and strategic missile systems, including subsystem design and application, mission design and analysis, materials and structures, developments in space sciences, space processing and manufacturing, space operations, and applications of space technologies to other fields.
In the present study we have developed a multi-cue bioreactor (MCB) that is capable of delivering a range of stimuli to assist the development of a tissue-engineered construct. The MCB provides an accurate and utilizable computer-controlled pulsatile pump and strain induction mechanism and it has the capability of app…
Hydrous titanium dioxide (TiO 2 · n H 2 O) was used to prepare K 2 Ti 2 O 5 single crystals, K 2 Ti 4 O 9 whiskers and K 2 Ti 6 O 13 whiskers at 820°, 940°, and 1110°C, respectively, by calcination. At T < 820°C, dehydration of hydrous titania, decomposition of potassium carbonate, and reaction between titanate and…
Abstract A series of new polybenzimidazopyrrolones (polypyrrolone, PPy) were synthesized by polycondensation of pyridine‐bridged aromatic tetraamines, including 2,6‐bis (3′,4′‐diaminophenyl)‐4‐phenylpyridine and 2,6‐bis(3′,4′‐ diaminophenyl)‐4‐(3″‐trifluoromethyl)phenyl pyridine, with various aromatic dianhydrides. Ex…
Abstract We discuss the use of multivariate design to ensure representativity and balance of the training set data for PLS multivariate modeling. Three application areas are used to illustrate the discussion, namely multivariate calibration in process analytical chemistry, quantitative structure activity relationships…
Tissue engineering may allow for the reconstruction of breast, facial, skin, and other soft tissue defects in the human body. Cell-seeded collagen gels are a logical choice for creating soft tissues because they are biodegradable, mimic the natural tissue, and provide a three-dimensional environment for the cells. The…
Classical molecular dynamics simulations are used to study the structure of densified germanium dioxide (GeO 2 ). It is found that the coordination number of germanium changes with increasing density (pressure) while pressure released systems exhibit only a marked angular change in local structure as compared to the v…
The mechanism of Al ohmic contacts to n-type zinc oxide (ZnO:Al) epitaxial layer was investigated. The formation of an Al-ZnO interfacial phase at room temperature was responsible for the low specific resistivity (8±0.3×10 -4 Ωcm 2 ). The results of Auger electron spectroscopy (AES), X-ray photoelectron spectroscopy (…
Demolition techniques for concrete and masonry structures. Case studies of demolition of structures, including prestressed concrete structures, nuclear power related structure, off-shore structures, chemical plants etc. Reuse, treatment and disposal of demolished concrete, stone and brick. The economics of demolition…
Abstract AgNO3 was reduced by ethylene glycol (EG) in the presence of Pt seeds and polyvinylpyrrolidone (PVP) under microwave heating. In addition to spherical nanoparticles, single-crystalline silver nano-films, rods, and wires were produced. The relative number ratio of nanorods and nanowire to the total silver nano…
Abstract Summary: A comparative study of polyelectrolyte microcapsules templated on melamine formaldehyde (MF) and manganese carbonate (MnCO 3 ) particles was performed using confocal Raman microscopy, scanning electron microscopy and by force measurements with an atomic force microscope. There is no significant diffe…
We have investigated partial discharge (PD) degradation for conventional polyamide-6. without nanoscale fillers (nanofillers) and polyamide-6 nanocomposites with 2 weight (wt) %, 4 wt% and 5 wt% addition. Such materials were subjected to partial discharge under the IEC (b) electrode configuration for evaluation. Compa…
We describe a history-dependent (non-Preisach) hysteresis model based on direct use of experimental first-order reversal curves. We propose that any second or higher order reversal curve can be constructed by using internal segments of the first-order reversal curves, and show that particular transplants (segments wit…
Anisotropic optical coatings offer unique polarizing properties, unmatched by conventional isotropic devices. Here we demonstrate the fabrication of a birefringent omnidirectional reflector, a type of photonic crystal, which exhibits complete reflection of radiation at 1.1 microm for all incidence angles and polarizat…
Abstract Structure and ionic conductivity of Mg-doped La10Si6O27 was investigated on dense ceramic samples prepared from sol–gel derived powders using two step sintering process. The conductivity was increased by the doping (from 22 to 30–39 mS cm−1 at 800 °C) because of expansion of the apatite lattice.
This review focuses on the association between mild renal insufficiency (stage 2 and 3 of chronic kidney disease) and cardiovascular disease and discusses therapeutic options. Although the association of chronic renal insufficiency and cardiovascular risk was first shown in patients with end-stage renal disease, even…