Materials Literature
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A new dihydrochalcone glucoside, vacciniifolin, along with confusoside, trilobatin and sieboldin were isolated from the leaves of Symplocos vacciniifolia. By the method of spectral analysis, this new compound was elucidated as 2',3,4,4'-tetrahydroxydihydrochalcone 4'-O-β-D-glucopyranoside.
Abstract Acrylic acid (AA) and its esters are monomers which can easily be polymerized. In order to avoid the unintentional polymerization during the manufacture and storage, the acrylic esters are stored under air‐atmosphere to which 15 ppm (g g –1 ) hydroquinone monomethylether (MeHQ) has been added. The consumption…
Abstract Melt mixed blends of ethylene–propylene–rubber (EPR) and polydimethylsiloxane (PDMS) were studied with regard to the composition dependence of the dynamic viscoelastic properties in relation to their morphology. Differential scanning calorimetry, scanning electron microscopy, and dynamic mechanical analysis (…
Atualmente, alguns laboratórios de análise de solo determinam Al, Ca e Mg trocáveis em extratos de KCl 1 mol L-1 e K e Na na solução extratora Mehlich-1, também usada na extração de fósforo. Outros laboratórios, que empregam a resina trocadora de ânions para P, avaliam também Ca, Mg e K no extrato, não sendo possível…
The change mechanisms of staple yarn hairiness during the winding process are studied using some previously published theories on yarn structures. Of the three kinds of yarn hairiness, the one formed by trailing and protruding fiber ends is analyzed first in terms of the interactions of the fiber ends, the tension dis…
Abstract Schmelzmetallurgisch hergestellte martensitische Fe‐Basis‐Legierungen des Systems Fe‐Cr‐C finden heute als Hartguss und Werkzeugstahl vielfältige Anwendung. Der Prozess des Heiß‐Isostatischen Pressens ermöglicht die Herstellung von Metal Matrix Composites, die mit nur 30 Vol.‐% an Hartstoffen herkömmliche Leg…
For large‐grained manganese zinc (MnZn) ferrite ceramics, grain misorientation determined by electron backscatter diffractions and grain‐boundary resistance measured using microcontact impedance spectroscopy have been correlated. The degree of oxidation of grain boundaries and, hence, the barrier height depends on the…
Abstract The platinum(II) terpyridyl acetylide complex [Pt(terpy)(CCR)]ClO 4 (terpy=2,2′ : 6′2″‐terpyridine, R=CH 2 CH 2 CH 3 ) (1) was incorporated into Nafion membranes. At high loading the dry membranes exhibit intense photoluminescence with λ max at 707 nm from the 3 MMLCT state. which was not observed in fluid s…
Highly porous, alumina‐based ceramic matrix composites (CMCs), without additional fiber‐matrix interphase, display excellent high‐temperature stability, damage tolerance, and thermal shock resistance. However, the very high gas permeability and the rough CMC surface associated with the winding pattern may give rise to…
By means of first-principles calculations based on the ab initio pseudopotential and plane wave basis, we present self-consistent molecular dynamic calculations to determine a clean TiO 2 crystal (001) surface geometry and surface electronic states structure. All calculations were performed for both rutile and anatase…
The effect of 16 O → 18 O isotope substitution on the electrical and magnetic properties of the manganite system Sm 1− x Sr x MnO 3 has been studied. It is shown that oxygen isotope substitution brings about a substantial change in the phase diagram in the intermediate region 0.4< x <0.6 between the ferromagnetic meta…
The presence of aromatic compounds in water is an important topic in environmental sciences. Silver-polydimethylsiloxane nanocomposites (Ag-PDMS) have recently been demonstrated as promising substrates for the detection of model environmental pollutants via surface-enhanced Raman spectroscopy (SERS). This work discuss…
Abstract Morpholinium meso ‐bis[citrato(3‐)‐ O 1 , O 3 , O 6 ]silicate ( meso ‐ 5 ) and racemic morpholinium bis[citrato(4‐)‐ O 1 , O 3 , O 6 ]silicate ( rac ‐ 6 ) were synthesized by treatment of tetramethoxysilane with citric acid and morpholine (molar ratio 1:2:2 and 1:2:4, respectively). Treatment of tetramethoxys…
Abstract This paper is a short review of the most recent achievments of CERM in the synthesis of poly (ϵ‐caprolactone) (PCL) and polylactides (PLA) in supercritical carbon dioxide (sc CO 2 ). In addition to the macromolecular engineering of these aliphatic polyesters, nanocomposites and PCL microspheres have been prep…
Abstract The growing interest in the natural zeolite is based on some specific peculiarities of its structure, which after dehydration enables adsorption processes of some polymer molecules and/or segments to take place on the zeolite surface. The main goal of the study is to investigate the effect of dehydrated zeoli…
Author: Straumal, B. et al.; Genre: Journal Article; Issued: 2004-07-03; Keywords: MPI für Metallforschung; Abt. Schütz; Abt. Mittemeijer; Abt. Aldinger; ZWE Metallographie; Grain Boundaries; Faceting; Misorientation Dependence; Stability Diagrams; Title: Grain boundary faceting close to the Σ3 coincidence misorientat…
In this paper electrical properties of a novel linear low-density polyethylene synthesized with a catalyst, developed by our unique technique, were measured. It was found that this polyethylene had a higher volume resistivity, a higher breakdown strength and less spacer charge accumulation than conventional high-press…
For highest efficiency optical devices, it is desirable to form continuously graded device features. We describe a technique to produce such features through the fabrication of a continuous-tone grayscale mask and subsequent grayscale photolithography. The design of the mask fabrication process is outlined, including…
This paper aims to analyze general waste handling in Hungarian particleboard production and give solutions based on experimental researches. During our research reuse of waste in Hungarian particleboard production was studied. A wood industrial branch, which can be considered as both a waste “producer” and a waste “re…
In this paper, we report results of the first studies on the thermoelectric power (TEP) of the magnetic heusler alloy ${\mathrm{Ni}}_{2.19}{\mathrm{Mn}}_{0.81}\mathrm{Ga}$. We explain the observed temperature dependence of the TEP in terms of the crystal field splitting and compare the observed behavior to that of the…