Materials Literature
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An acid-base bifunctional ionic solid catalyst [PySaIm](3)PW was synthesized by the anion exchange of the ionic-liquid (IL) precursor 1-(2-salicylaldimine)pyridinium bromide ([PySaIm]Br) with the Keggin-structured sodium phosphotungstate (Na(3) PW). The catalyst was characterized by FTIR, UV/Vis, XRD, SEM, Brunauer-Em…
Abstract The tensile properties and fracture behavior of poly‐(para‐phenylene‐2,6‐benzobisoxazole), poly‐(para‐phenylene terephthalamide), co‐poly‐(para‐phenylene‐3,4′‐oxydiphenylene terephthalamide), polyarylate, polyethylene, and poly(lactic acid) high‐performance polymeric fibers have been investigated. The Weibull…
The one-step preparation of heterodifunctional telechelic polymers containing 2,2′:6′,2′′-terpyridine (tpy) and 2-ureido-4[1H]-pyrimidinone (UPy) end-groups, as orthogonal supramolecular moieties, is reported. The utilization of an appropriately functionalized alkoxyamine, as an initiator for the nitroxide-mediated ra…
Numerous proteins require cofactors to be active. Computer simulations suggest that cooperative interaction networks achieve optimal cofactor binding. There is a need for the experimental identification of the residues crucial for stabilizing these networks and thus for cofactor binding. Here we investigate the electr…
OBJECTIVES: The study aimed to evaluate the efficacy of the porcine small intestine submucosa extracellular matrix (SIS-ECM) in a murine model, as a possible vascular patch for clinical use in reconstructive vascular and potentially cardiac surgery. METHODS: Fifteen adult male Sprague Dawley rats and five green fluore…
In the present study, we examined photodarkening loss reduction in Yb3+ doped aluminosilicate fibers by utilizing 633 nm light irradiation. It is demonstrated that the final photobleaching value is intensity dependent, but the percentage of photodarkening reduction does not depend on dopant concentrations for settled…
A photoresponsive microgel is designed by the combination of a noncovalent assembly strategy with a covalent cross-linking method. End-functionalized poly(ethylene glycol) with azobenzene [(PEG-(Azo)(2))] was mixed with acrylate-modified β-CD (β-CD-MAA) to form photoresponsive inclusion complex through host-guest inte…
15-kV-class 4H-SiC PiN diodes with various junction termination structures have been experimentally investigated. Employment of the space-modulated junction termination extension (SM-JTE) and the two-zone JTE have realized a breakdown voltage over 15 kV, corresponding to 93% of the parallel-plane breakdown voltage. Th…
Breaking news: A unique discontinuous property and an active phase of Ni/ordered Ce2Zr2Ox (x=7–8) solid-solution catalysts were observed during methane steam reforming. The catalytic performance of Ni/Ce2Zr2Ox strongly depended on the phase and oxygen content of the Ce2Zr2Ox support.
This paper presents a time-domain method for electrochemical impedance spectroscopy (EIS) analysis using ordinary least squares (OLS). In this approach, an electrochemical device, e.g., fuel cell or battery, is perturbed galvanostatically by a small-signal sinusoid that is logarithmically swept in frequency. Using fou…
Abstract Syntactic iron foams are produced by metal injection moulding from pure Fe powder and two grades of commercial glass microspheres. Mechanical performance of samples containing 5/10/13 wt% of microspheres is compared to unfilled reference material properties at strain‐rates covering 6 orders of magnitude, incl…
Conditional release: pH-Sensitive polymersomes are stabilized by cross-linking through short UV irradiation for reversible swelling/shrinking upon switching the pH. The membrane of these polymersomes behaves as a gate, which traffics the release of small bioactive molecules, such as doxorubicin from the lumen of polym…
Abstract It is shown that electrospun poly(vynilidene fluoride) nanofibers are fully poled right after preparation and show β‐phase contents of ∼70%, therefore being able to be implemented into electroactive devices without further processing steps. Further, the local piezoelectric properties of individual electrospun…
The synthesis of CdS nanostructures (bands, wires, irregular structures) was investigated by systematic variation of temperature and gas pressure, to deduce a comprehensive growth phase diagram. The high quality nanowires were further investigated and show stoichiometric composition of CdS as well as a single-crystall…
The redox properties and electronic structures of polycationic species were examined using a triphenylamine double-decker species. The double-decker has a strong electron-donating ability, and the spin in the radical cation is delocalized over the whole caged skeleton, despite no direct transannular π–π interaction be…
The magnetic and electronic properties of Ba${}_{4}$Ru${}_{3}$O${}_{10}$ were investigated by the ab initio and model calculations. It is shown that nonmagnetic ground state of the one-third Ru${}^{4+}$ ions is not due to the correlation effects. It is rather caused by the charge disproportionation between crystallogr…
Pentanol is one of the promising "next generation" alcohol fuels with high energy density and low hygroscopicity. In the present work, dominant reaction channels of thermal decomposition of three isomers of pentanol: 1-pentanol, 2-methyl-1-butanol, and 3-methyl-1-butanol were investigated by CBS-QB3 calculations. Subs…
Oxygen activation by copper(I) complexes with tetra- or pentadentate mono- or dinucleating bispidine ligands is known to lead to unusually stable end-on-[{(bispidine)Cu}(2)(O(2))](2+) complexes (bispidines are methyl-2,4-bis(2-pyridin-yl)-3,7-diazabicyclo-[3.3.1]-nonane-9-diol-1,5-dicarboxylates); catecholase activity…
Structural backbones of iron-scavenging siderophore molecules include polyamines 1,3-diaminopropane and 1,5-diaminopentane (cadaverine). For the cadaverine-based desferroxiamine E siderophore in Streptomyces coelicolor, the corresponding biosynthetic gene cluster contains an ORF encoded by desA that was suspected of p…
Epoxy-based nanocomposites containing functionalized nanoscale TiO2 with 0.5%, 1%, 5%, and 10% by weight were developed. A coupling agent was employed to functionalize nano titania for better compatibility of nanoscale particles with dispersing media. Under sliding conditions, the specific wear rate and coefficient of…