Materials Literature
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Photoschaltbar: Die Aktivität eines auf Dithienylethen basierenden Inhibitors für Carboanhydrase I (hCAI) wird durch Licht reguliert. Die UV-induzierte Umwandlung des flexiblen, offenen Isomers in das starre, geschlossene Isomer reduziert die Inhibition und erhöht die Enzymaktivität um das Fünfzigfache. Der Inhibitor…
Biological complexes typically exhibit intermolecular interfaces of high shape complementarity. Many computational docking approaches use this surface complementarity as a guide in the search for predicting the structures of protein-protein complexes. Proteins often undergo conformational changes to create a highly co…
Most polymers used in clinical applications today are materials that have been developed originally for application areas other than biomedicine. On the other side, different biomedical applications are demanding different combinations of material properties and functionalities. Compared to the intrinsic material prop…
MoO3/SiO2 composite with varying amounts of MoO3 loading (1–20 wt.%) were prepared by sol–gel method and calcined at 500 °C. These catalysts were employed for the liquid phase condensation of anisole with paraformaldehyde. All the catalysts were characterized by N2 sorption, XRD, and NH3-TPD. The activities of synthes…
Controlled precipitation: Silica can control the precipitation of a CoFe Prussian Blue analogue (PBA) by reversibly protecting the CoII ions. The precursors are introduced into a silica sol and precipitation of the PBA is triggered by acidification after condensation of the silica network (see picture). This original…
Abstract Changes in phase composition and chain mobility in injection‐molded isotactic poly(propylene), crystallized from the melt with slow cooling rate and subsequently quenched, associated with aging at temperature well above T g for 150 and 1 000 h, are studied using time‐domain 1 H solid‐state NMR and XRD. All sa…
Flexoelectricity is a unique property of liquid crystals; it is a linear coupling between electric polarizations and bend and/or splay distortions of the direction of average molecular orientation. Recently it was shown [J. Harden, Phys. Rev. Lett. 97, 157802 (2006)] that the bend flexoelectric coefficient in bent-cor…
The study reported herein is focused on measuring, as well as on modeling numerically, the positions and intensities of the absorption bands in the electronic spectrum of benzene ring-based mono-azo dyes, while preserving their potential mesogenic ability. Both non-polar structures, as well as highly polar push-pull s…
Helical oligomers of beta-peptides represent a particularly promising type of building block for directed assembly of organic nanostructures because the helical secondary structure can be designed to be very stable and because control of the beta-amino acid sequence can lead to precise patterning of chemical functiona…
Abstract In this study, antibacterial properties were induced in polyurethane (PU) films by the incorporation of Ag + ‐loaded zeolites as fillers. The mechanical and thermal properties of the prepared composites were also investigated. For this purpose, two different types of zeolite microparticles, high‐silica zeolit…
New types of stress sensitive and magnetic field tunable microwave composite materials are discussed where embedded short ferromagnetic microwire inclusions are used as controllable radiative elements. The dc external magnetic field is applied to the whole composite structure. And, the local stress is transferred to t…
The crosslinking methods of collagen using glutaraldehyde (GTA) and 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide (EDC)/N-hydroxysuccinimide (NHS) are frequently performed in biomedical applications, but both methods still have their own disadvantages, including the GTA cytotoxicity and low degree of EDC/NHS crossli…
Abstract Natural rubber composites were prepared by the incorporation of palm ash at different loadings into a natural rubber matrix with a laboratory‐size two‐roll mill (160 × 320 mm 2 ) maintained at 70 ± 5°C in accordance with the method described by ASTM D 3184–89. A coupling agent, maleated natural rubber (MANR),…
Net result: Two-dimensional nanonets form spontaneously in a chemical vapor deposition reaction. All beams in the nanonet are single-crystalline nanobelts that are connected by 90° joints. The nanonets are roughly 15 nm thick and a few micrometers long and wide (see pictures for three images at different tilting angle…
Abstract Self‐cleaning surfaces have received a great deal of attention, both in research studies and commercial applications. Both transparent and non‐transparent self‐cleaning surfaces are highly desirable as they offer many advantages, and their potential applications are endless. The self‐cleaning mechanism can be…
Abstract Electrostatic interactions : A versatile donor–acceptor system has been constructed by exploiting the electrostatic interactions between covalently and noncovalently polymer‐functionalized SWNTs (i.e., SWNT–PVBTA n + and SWNT/PVBTA n + ) and porphyrins (i.e., H 2 P 8− or ZnP 8− ). The nanohybrids thus formed…
The stress tensors are used widely for description of internal forces of matter. For some time it is also applied in quantum theory in studies of molecular properties in chemical systems. Electronic stress tensors measure effects caused by internal forces acting on electrons in molecules and particularly those between…
Submicrometer alumina suspensions, dispersed in aqueous acidic solutions of polyvinyl alcohol (PVA) and 2,5‐dimethoxy‐2,5‐dihydrofuran, have been evaluated for suitability as a cross‐linkable binder system for casting complex‐shaped ceramic components. Suspensions of up to 50 vol% solids have rheological behavior, whi…
In the twist: The extent of twisting from planarity in a series of perylenetetracarboxylic diimides (PDIs) modulates the attractive π–π stacking force, revealing an array of inherent molecular recognition codes. Such coded self-assembly directs specific reaction pathways so that a mixture of reactive monomers with dif…
Abstract With a shell of PVA–melamine–formaldehyde resin, microencapsulated ammonium polyphosphate (VMFAPP) is prepared by in situ polymerization and characterized by FTIR and XPS. Microencapsulation gives VMFAPP better water resistance and flame retardance compared with APP in PP. Thermal stability and fire resistanc…