Materials Literature
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BACKGROUND AND OBJECTIVE: Both photodynamic (PDT) and photothermal (PTT) therapy have proven to be effective treatment strategies for cancer, but the approach of combining them into a single treatment modality may offer better treatment efficacy. We compare the treatment efficacy of such combined treatment with the in…
Oxoferryl gymnastics: The oxo and CH3CN ligands in 1-NCCH3 can swap positions in the presence of iodosobenzene and tetrafluoroborate anion leading to the generation of a more reactive isomer 2. This conversion is proposed to take place via an activated FeIV unit (1 a) or a transient dioxoiron(VI) species (1 b).
Single and multicomponent fixed-bed adsorption of CO2, N2, and CH4 on crystals of MOF-508b has been studied in this work. Adsorption equilibrium was measured at temperatures ranging from 303 to 343 K and partial pressures up to 4.5 bar. MOF-508b is very selective for CO2 and the loadings of CH4 and N2 are practically…
Enzyme instability is a major factor preventing widespread adoption of enzymes for catalysis. Stability at high temperatures and in the presence of high salt concentrations and organic solvents would allow enzymes to be employed for transformations of compounds not readily soluble in low temperature or in purely aqueo…
Seeing the filling in fullerenes: The 13C NMR chemical shifts of the C2 units in Sc2C2@C82(C3v), Sc2C2@C84(D2d), [Sc3C2@C80(Ih)]− (see picture), adamantylidene adduct of Sc3C2@C80(Ih) were observed for the first time and agree well with the calculated values. The 13C NMR chemical shifts of all cage carbon atoms in the…
Poly[5,${5}^{\ensuremath{'}}$-bis(3-dodecyl-2-thienyl)-2,${2}^{\ensuremath{'}}$-bithiophene] (PQT-12) is a conjugated polymer that shows promising performance $(\ensuremath{\mu}>0.1\text{ }{\text{cm}}^{2}/\text{V}\text{ }\text{s})$ as a semiconductor for thin-film electronics. The electrical properties of PQT-12 thin…
Abstract Ethyl cellulose graft poly(poly(ethylene glycol) methyl ether methacrylate) (EC‐ g ‐P(PEGMA)) amphiphilic copolymers were synthesized via atom transfer radical polymerization (ATRP) and characterized by FTIR, 1 H NMR, and gel permeation chromatography. Reaction kinetics analysis indicated that the graft copol…
The lowered combustion temperature in diesel engines is capable of reducing nitrogen oxides and soot simultaneously, which can be implemented by the heavy use of exhaust gas recirculation (EGR) or the homogeneous charge compression ignition (HCCI) type of combustion. However, the fuel efficiency of the low-temperature…
The element-specific magnetic structure of an epitaxially grown Mn_52Pd_48/Fe bilayer showing exchange bias was investigated with atomic-layer depth sensitivity at the antiferromagnet/ferromagnet interface by soft-x-ray magnetic circular dichroism and magnetic reflectivity. A complex magnetic interfacial configuration…
The calcium activated K(+) channel KCa3.1 plays an important role in T lymphocyte Ca(2+) signaling by helping to maintain a negative membrane potential, which provides an electrochemical gradient to drive Ca(2+) influx. We previously showed that nucleoside diphosphate kinase beta (NDPK-B), a mammalian histidine kinase…
How protein sequence codes for 3D structure remains a fundamental question in biology. One approach to understanding the folding code is to design a pair of proteins with maximal sequence identity but retaining different folds. Therefore, the nonidentities must be responsible for determining which fold topology prevai…
Bessere Kennzahlen: Elektrolumineszenzbauteile mit einem einfachen Carbazol-Oxadiazol-Hybrid als Wirt für Dotierungsmittel zeigen eine maximale externe Quanteneffizienz (ηEQE) von 20.2 % für grüne und von 18.5 % für tiefrote Elektrophosphoreszenz (siehe Bild, J=Stromdichte). Der Wirt ist einfach erhältlich und weist e…
Spatial and temporal control of bioactive signals in three-dimensional (3D) tissue engineering scaffolds is greatly desired. Coupled together, these attributes may mimic and maintain complex signal patterns, such as those observed during axonal regeneration or neovascularization. Seamless polymer constructs may provid…
Highly efficient transparent OLEDs are demonstrated. A novel WO3 buffer layer protects the organics during the sputter deposition of the top ITO electrode. L–J–V and SIMS analysis yield optimized devices with a 60 nm thick WO3 layer. Very high efficiencies of 38 cdA−1 and 30 lm W−1 at 100 cd m−2 are obtained. At the s…
The mechanism of olefin hydrogenation on a supported noble-metal catalyst requires the presence of weakly bound hydrogen atoms absorbed in the volume of the metal particle (see picture). Co-adsorbed carbonaceous deposits affect the hydrogen distribution in the metal clusters and critically control their activity and s…
Efficient combination of two polymerization reactions allowed various complex issues in photovoltaic devices, such as light absorption, the presence of a donor–acceptor heterojunction, photoluminescence quenching, crystallinity, and microphase separation, to all be addressed in a single block copolymer (see picture).
Direct metal deposition (DMD) is a rapid laser-aided deposition method that can be used to manufacture near-net-shape components from their computer aided design (CAD) files. The method can be used to produce fully dense or porous metallic parts. The Ti-6Al-4V alloy is widely used as an implantable material mainly in…
BACKGROUND: Pseudomonas putida is the best studied pollutant degradative bacteria and is harnessed by industrial biotechnology to synthesize fine chemicals. Since the publication of P. putida KT2440's genome, some in silico analyses of its metabolic and biotechnology capacities have been published. However, global und…
Abrasive wear of sharp silicon tips sliding distances of up to 750 m on a polymeric surface is studied using atomic force microscopy. The data cannot be explained by conventional macroscopic wear models. We present a new model in which the barrier for breaking an atomic bond is lowered by the frictional stress acting…
The ability of electron microscopes to analyze all the atoms in individual nanostructures is limited by lens aberrations. However, recent advances in aberration-correcting electron optics have led to greatly enhanced instrument performance and new techniques of electron microscopy. The development of an ultrastable el…