Materials Literature
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We newly produced bioresorbable beta-chitin sponge and used it as a scaffold for three-dimensional culture of chondrocytes. beta-Chitin was obtained from the pens of Loligo squid and the beta-chitin sponge was formed into a pillar shape. We produced cartilage-scaffold composites with a cartilage-like layer at the surf…
The effect of a range of carbon additions on the microstructure and mechanical properties of the beta titanium alloy Ti-15-3 (Ti - 15V - 3Al - 3Sn - 3Cr) (wt-%) has been studied. It has been found that the strength is improved by about 16% and the ductility of Ti-15-3 is maintained at about the same level when 0.2% ca…
Composites containing NiTi shape memory alloy (SMA) long-fiber, short-fibers or Ti long-fiber in a Polycarbonate (PC) matrix have been fabricated by the injection molding technique. Also, prestrained SMA long-fiber/Epoxy matrix composites have been fabricated. The fracture behavior and thermo-mechanical deformation be…
When NbC–30 wt% Co powder compact is sintered at various temperatures where NbC grains (with small amounts of Co) coexist with a liquid Co–NbC matrix, the NbC grains undergo a surface roughening transition with temperature increase and the grain growth changes from abnormal to normal growth. When sintered at 1400°C, t…
The synthesis and characterization of five hydrogen-bonded ferroelectric liquid crystal complexes (HBFLCs) prepared from mesogenic p-n-alkoxy benzoic acids and non-mesogenic propionic/butyric acids with different chiral centres are reported. Complementary intermolecular hydrogen bonding is confirmed through IR study.…
A new organic-based magnet, V[TCNP]2.yCH2Cl2 (TCNP = tetracyanopyrazine), has been synthesized, and its magnetic properties have been examined. The amorphous nature of V[TCNP]2.yCH2Cl2 makes it difficult to determine the structure of the material; however, ac and dc magnetic measurements indicate that it is a ferrimag…
Nanostructured ZnSe (Q-ZnSe) films synthesized by a wet chemical route have been studied. The evolution of particle size dependent strain, morphology and luminescence properties have been investigated, using x-ray diffraction, atomic force microscopy, transmission electron microscopy and optical absorption and lumines…
The formation of hydroxysulphate green rust 2, a Fe(II-III) compound commonly found during corrosion processes of iron-based materials in seawater, has not yet been reported in bacterial cultures. Here we used Shewanella putrefaciens, a dissimilatory iron-reducing bacterium to anaerobically catalyze the transformation…
Carbon nanotubes (CNTs) used as a probe for scanning probe microscopy has become one of the many potential usages of CNTs that is finding real applications in scientific research and industrial communities. It has been proposed that the unique mechanical buckling properties of the CNT would lessen the imaging force ex…
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…