Materials Literature
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This paper describes some of the processing issues for extruding salicylic acid-based polymer prodrugs into fibers for medical devices. Polymeric prodrugs, in which a drug is polymerized in a degradable polymer that delivers controlled quantity of the drug to a targeted site in the body as the device degrades, are a n…
Luminescent polymer electrolyte composites composed of silica coated Y 2 O 3 :Eu in polyethylene glycol (PEG) matrix has been produced by initially synthesizing silica coated Y 2 O 3 :Eu and mixing with polyethylene glycol in a lithium salt solution. High luminescence intensity at round 600 nm contributed by electron…
Dispersive features observed in graphite, carbon nanotube bundles and isolated single‐wall carbon nanotubes are discussed. Special attention is given to the effects of the van Hove singularities in 1D nanotubes.
A novel tubular solid oxide fuel cell configuration with high volumetric power packing density is discussed. With good thermal shock resistance, high mechanical strength, easy sealing, and high volume manufacturing ability, tubular SOFC designs offer many advantages over planar designs. One shortcoming is the lower vo…
Tensile deformation was carried out for a mechanically milled Al–1.1 mol%Mg–1.2 mol%Cu alloy at temperatures of 523–823 K and a true strain rate of 1×100 s−1. The largest uniform elongation prior to local necking occurred at an intermediate temperature (748 K). This temperature dependence of the uniform elongation was…
In the present paper, the crystalline orientation in melt spun (Nd,Dy)-(Fe,Co)-B ribbons was investigated. The average ribbon thicknesses for Nd15Fe77B8, Nd15Fe75Co2B8 and Nd14DyFe75Co2B8 at V=1 m/s are 300, 380 and 420 μm, respectively. The thickness of (Nd,Dy)-(Fe,Co)-B ribbons decreases with increasing roller speed…
Two key technologies were reviewed to propose effective approaches to functional glasses. One is combinatorial glass synthesis system. The combinatorial glass synthesis system consists of automatic batch preparation apparatus and two types of automatic apparatuses for melting of glass batches in crucibles. The combina…
The phase transformations from the ε- to τ-phases for alloys with the composition of Mn53.6–Al46.4 doped with carbon were investigated using SEM with EDS, optical microscopy and XRD, where the ferromagnetic τ-phase was clearly visualized by suspending a ferromagnetic colloid fluid. When the quenched specimen of the ε-…
In order to clarify the mechanisms of partial discharge (PD) and tree degradation, PD characteristics of an artificially-simulated tree channel in low-density polyethylene (LDPE) were investigated. During the application of AC voltage, new tree channels were formed at the tip of the artificial channel. PD characterist…
恵庭aテフラ(En-a,17ka BP)の火山ガラス屈折率は,試料採取地点によって異なることがある.その原因は,En-aはフォールユニットごとに火山ガラス屈折率が異なるからである.石狩低地帯南部では,En-aに少なくとも3つのフォールユニットが認められる.火山ガラス屈折率は,上位フォールユニットで高い値(n=1.510-1.514),中～下位フォールユニットで低い値(n=1.505-1.510)を示す.また,単一のフォールユニット内であっても,火山ガラス屈折率は層準によって若干異なる.なお,斜方輝石屈折率については,最下位層準でやや高い値(γ=1.713-1.716)を示すほかは,全層準を通じてほぼ一定の値(γ=1.710-1.7…
Octachlorostyrene has been recovered from the reaction tube, along with previously reported hexachlorobenzene, during the synthesis of CrCl 3 from Cr 2 O 3 and CCl 4 at high temperature. The region in the reaction tube where the octachlorostyrene was found, namely upstream from the Cr 2 O 3 held at 890C, suggests that…
Magnetic clusters, such as Fe8 and Mn12, within large organic molecules, behave at low temperature T as large single spins S, that is, as single molecule magnets (SMM’s). In crystals, magnetic anisotropy gives rise to energy barriers U, and quantum tunnelling is then the only available path for magnetic relaxation at…
Electron‐electron coincidence techniques have been widely used to study atoms and molecules. In contrast, the application of APECS to solids has been much more limited. Recently, however, APECS has started to progress from a technique that is primarily devoted to analyzing Auger line shapes and making interesting anec…
Synchrotron Radiation micro X‐Ray Fluorescence (SR μ‐XRF) was applied for the first time to map the trace element content on Multicellular Tumor Spheroids (MTS), i.e. human cell clusters used as an in vitro model for testing micrometastases responses to antitumoral drugs. In particular, immunotoxin molecules composed…
1/2 (A - stala wymiany, K1 - stala anizotropii) od ich powierzchni. Wklad tych obszarow w sumaryczną wartośc remanencji magnesu rowny jest iloczynowi ich udzialu i namagnesowania nasycenia fazy objetej oddzialywaniami wymiennymi. Zaleznośc remanencji od zawartości pierwiastka ziem rzadkich obliczona wedlug takiego mod…
Using two cationic electropaint resins, the deposition mechanism including the film structure was studied. The resins introduced methyl methacrylate (MMA system) or methyl acrylate (MA system) into a backbone component, and these systems showed different values of the glass transition temperature The MMA resin had a o…
This work deals with the effect of the addition of a combination of two chemical blowing agents (BA), azobisformamide (ABFA) and/or sodium bicarbonate (SBC), on the processability of rigid polyvinylchloride (PVC) using a Brabender torque rheometer. This technique was previously used under conditions bearing no relatio…
Epiphytie and epilithic diatoms of the Surgu Reservoir were investigated in April 1997-March 1998. Epiphytic and epilithic diatoms in the reservoir were generally similar. In 76 diatom toxa were recorded in the Surgu Reservoir. Cymbella afflnis Kutz., Navicula cryptocephala Kutz., N. cryptocephala var. veneta (Kutz.)…
The effect of weight reduction on static- and dynamic- drape coefficients of polyester-fiber fabrics was studied precisely using 2 sets of fabric samples, one of which had various weave densities of weft yarns. Following conclusions were obtained: (1) Node number; n, the revolving drape increase coefficient; Dr, and t…
The mechanochemical (MC) synthesis of La-modified lead zirconate titanate (PLZT) powder from its constituent oxides was conducted with planetary ball milling. A single-phase perovskite PLZT powder was synthesized by dry-milling the oxide mixture for a relatively short period (36 ks at 400 rpm). Dense PLZT bulk samples…