Materials Literature
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In this work the usefulness of the technique of thermally stimulated depolarization currents (TSDC) to the study of the secondary relaxations in amorphous solids, and particularly of the Johari-Goldstein (JG) relaxation, is emphasized. The features of the JG relaxation are carefully analyzed, and the contribution of t…
Manufacturing and characterizing hydroxycamptothecin inclusion liposomes, establishing their quality standard and testing their in vitro anti-tumor activity is of significance for potential application. The neutralization agitation method was used to prepare hydroxycamptothecin inclusion and film evaporation method wa…
The manufacturing of metal–ceramic composites was investigated as part of subproject “C3–CerMetComp” at the ECEMP Excellence Cluster in Dresden. Three different manufacturing technologies were investigated: (i) Thermal spraying for the preparation of metal–ceramic multilayers; (ii) tape casting of layered composites f…
Time-resolved synchrotron X‑ray powder diffraction data were used to investigate the dehydration behavior of the chalcophanite (ZnMn 3 O 7 ·3H 2 O) structure from 300 to 1060 K. Rietveld refinements revealed two obvious phase changes, at ∼450 and ∼950 K, corresponding to the dehydration of chalcophanite followed by tr…
Tetrapyrazinocorrolazines — first corrolazine derivatives with annulated heterocycles — have been prepared as phosphorus(V) complexes by the reaction of metal free tetrapyrazinoporphyrazines [( R 8 TPyzPA ) H 2] (R = Ph, Me) with phosphorus(III) chloride or bromide in pyridine. Oxophosphorus(V) complexes [( R 8 TPyzCA…
The results from a comprehensive investigation of the structure, phase and chemical composition, microhardness, and nanomechanical and tribological properties of chromium-doped coatings of hydrogenised amorphous carbon a-C:H:Cr are presented. The coatings are deposited via reactive magnetron sputtering in an Ar + C2H2…
This paper explores the crystal chemical features of the bulk and the outermost (001) surface layers of two trioctahedral Li-rich mica-1M (space group C2) polytypes, i.e., a polylithionite (MLG-114) from Li-mica granitic pegmatite at St. Austell (SW England) and a Fe 2+ -rich polylithionite (Ch-140) from a rhyolite at…
The aim of this work is to evaluate the catalytic properties (activity, selectivity, and stability) of PtNi catalysts supported on Ce–Zr−α-Al 2 O 3 (CZA) in the liquid-phase conversion of glycerol and to relate them to the results of the EXAFS characterization. The PtNi/CZA catalyst presents the highest global activit…
In this paper, magnetic and fluorescent bifunctional YbPO4:Er,Dy microspheres were synthesized via a simple solvothermal method. The prepared microspheres exposed to 980 nm near-infrared (NIR) laser light emitted bright upconversion fluorescence (450-570 nm) after calcination at high temperatures (>800°C). Results of…
Considering the versatility of 5,10,15,20-tetrakis(pentafluorophenyl)porphyrin (TPPF20) to react with nucleophiles we highlight here the synthesis and characterization of several mono- and tetra-thiocarboxylate derivatives. The selective displacement of the para-fluorine groups in TPPF20 by thiocarboxylic acids demons…
First chiral bornane[2,3-b]pyrazino-fused [30]trithiadodecaazahexaphyrins were prepared by a crossover condensation of R-(+)- or S-(–)-bornane[2′,3′-b]-2,3-dicyanopyrazine and 2,5-diamino-1,3,4-thiadiazole using two different methods. R-(+)- and S-(–)-enantiomers were characterized by their optical rotations and circu…
Silver nanoparticles (AgNPs) were successfully synthesized and impregnated on silica using chemical reduction methods. XPS and Ag K-edge XANES analysis revealed that the impregnation of AgNPs onto silica using a chitosan + sodium borohydride (NaBH4) method results in higher silver loading and Ag(0)/Ag(I) ratio compare…
Very low frequency (VLF) testing refers to AC testing in the frequency range of 0.01 Hz up to 1 Hz. VLF testing is increasingly becoming popular as an alternative approach for test objects which require significant reactive power such as power cables. However, reliable diagnosis of partial discharge characteristics un…
This paper represents experimental techniques to simulate the naturally polluted high voltage insulators, under conditions that simulate the desert environment. Usually, the IEC fog method is used for testing the polluted insulators of high voltage transmission lines, but it does not simulate them under the desert pol…
The major obstacle in treating cancer depends on the low therapeutic index of most anticancer drugs. The lack of specificity, coupled with the large volumes of distribution, translates into a nonpreferential distribution of anticancer drugs to the tumor. Accordingly, the dose of the anticancer drug that is achievable…
Many office workers today sit and work at computers for extended periods of time, which can result in a group of symptoms called “Office Workers Syndrome”. To help prevent these symptoms, we propose a novel system to monitor computer users by using a Kinect camera. Firstly, data mining classification is applied for de…
Magnetosonoporation (MSP) is a relatively safe and efficient approach for instant MR stem cell labeling. In this study, the physical and magnetic properties of different formulations of synthesized superparamagnetic iron oxide nanoparticles (SPION) were characterized. Then, a "closed" MSP apparatus using focused ultra…
The new kind of bio-based nylon 56 fiber has been synthesized by adipic acid and 1,5-pentanediamine, which was prepared by fermenting a variety of starch in straw. The resistance of the nylon 56 fiber to acid need to be studied because the problem of nylon fabrics often encounter reactions of chemical reagents in thei…
A series of pegylated cis-A2B2- or A3B-type ZnPcs , substituted on the α-positions with tri(ethylene glycol) and hydroxyl groups, were synthesized from a new bis-phthalonitrile. A clamshell-type bis-phthalocyanine was also obtained as a byproduct. The hydroxyl group of one ZnPc was alkylated with 3-dimethylaminopropyl…
The paper reports on development of magnetodielectric material with high microwave permeability. The material is a laminate of multi-layer permalloy films deposited onto a thin mylar substrate by magnetron sputtering. The deposited films are arranged into a stack and glued together under pressure to obtain the laminat…