Materials Literature
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Studies of Mg2Cu6Ga5 reveal that this compound contains incomplete Bergman clusters in its structure and shows a pseudogap and empty bonding states just above the Fermi energy according to band calculations. Under a rigid band assumption, such a compound may be tuned to approximant and quasicrystal phases in which the…
Abstract Cationic polyelectrolytes with pyridinium and 1,2‐dimethylimidazolium functionalities based on a hyperbranched polyglycerol scaffold with a narrow polydispersity were prepared by a polymer analogous reaction in a one‐pot synthesis. By the variation of the spacer lengths between the cationic functionalities an…
The mono/bifunctional and metallo/non-metallo properties of Bacillus subtilis DAHPS (3-deoxy-D-arabino-heptulosonate 7-phosphate synthase) have been controversial for several decades. The present study investigated the DAHPSs from both the B. subtilis parent Marburg strain and the derivative strain 168 in detail and c…
Abstract The upconversion luminescence in Nd 3+ ‐doped bismuth–borate glass, excited by 0.8 µm light, was studied in the visible spectral region. Four distinct emission bands were found. From their kinetics, two mechanisms can be shown to be responsible for all four lines: energy‐transfer upconversion, slightly domina…
We report the x-ray photocurrent response of a coplanar chemical vapor deposition diamond detector fabricated using a metal-less graphitic ohmic contact. Ion implantation of 70 keV boron ions to a dose of 2×1016cm−2 was performed through a patterned photoresist to produce a coplanar graphitic contact structure. The de…
We have measured the solubilities of manganese dioxide and aluminum oxide in isobutyric acid + water along its critical isopleth at temperatures above the upper critical solution temperature at 26.2 degrees C. Both oxides are basic anhydrides that react with isobutyric acid to produce the metal isobutyrate and water.…
Abstract Es wird ein Überblick über den Stand der Technik, der experimentellen Analyse und der modellmäßigen Erfassung der im Pkw‐Bereich wichtigsten Abgasreinigungsverfahren – 3‐Wege‐Katalysatoren für λ‐geregelte Otto‐Motoren, NO X ‐Speicherkatalysatoren und Dieselrußfilter – gegeben. Während der serienmäßig eingeset…
Purpose To investigate the inhibitive effect of Congo red dye (CR) for aluminium corrosion in strong alkaline solutions and evaluate the synergistic effect of halide ions on the inhibition efficiency. Design/methodology/approach Corrosion rates of aluminium test coupons were determined by gravimetric technique at 30 a…
Ni(x)Pb(1-x) nanowire arrays were successfully fabricated by AC electrodeposition within the nanopores of ordered porous alumina films prepared by a two-step anodization. Transmission electron microscopy analyses showed that the Ni-Pb nanoarrays are polycrystalline with dimension uniformity around 20 nm in diameter an…
Abstract The synthesis and characterization of a new series of aromatic polyesters based on D‐mannitol and galactitol are described. These polyesters were obtained by polycondensation reaction of the terephthaloyl chloride or isophthaloyl chloride and 2,3,4,5‐tetra‐ O ‐methyl‐D‐mannitol or 2,3,4,5‐tetra‐ O ‐methyl‐gal…
We describe a synthetic investigation on the formation of carbon nanofibers using a preshaped free-standing metal-oxide catalyst (single-crystal cobalt oxide (Co(3)O(4)) nanocubes). In reacting with acetylene (C(2)H(2)) vapor, Co(3)O(4) nanocubes are reduced and reconstructed into metallic cobalt. The resultant metal…
Abstract For Abstract see ChemInform Abstract in Full Text.
Cholesteric blue phases are a spectacular example of disclination line networks. Here we numerically investigate their response to an imposed Poiseuille flow. We show that shear forces bend and twist and can unzip the disclination lines. Under gentle forcing the network opposes the flow and the apparent viscosity is l…
A family of four-helix bundle peptides were designed to be amphiphilic, possessing distinct hydrophilic and hydrophobic domains along the length of the bundle's exterior. This facilitates their vectorial insertion across a soft interface between polar and nonpolar media. Their design also now provides for selective in…
Five polymorphs of the antidepressant drug venlafaxine hydrochloride (VenHCl) are reported. Forms 1 and 2 are crystalline modifications, form 3 is obtained by melting, form 4 is a hydrate/alcoholate, and form 5 is an amorphous, glassy phase from sublimation. These five polymorphs of VenHCl are characterized by differe…
We show how photo-cross-linking of nanoparticles within the micrometer-sized thin oil shell of water-oil-water emulsion droplets leads to a new species of optically addressable microcontainers. The inner water droplet of these emulsions may contain drugs, dyes, or other water-soluble components, leading to filled cont…
Chitosan and O-carboxymethylchitosan (OCMCS) have been proved to have biocompatibility and have been extensively researched in the field of biomaterials. In this study, Confocal-reflectance interference contrast microscopy (C-RICM) in conjunction with phase contrast imaging was used to investigate the adhesion contact…
The electromechanical coefficient ${d}_{33}$ of wurtzite ZnO is determined by direct first-principles density functional calculations which are performed for solids under finite electric fields. Our theoretical ${d}_{33}$ value of $12.84\phantom{\rule{0.3em}{0ex}}\mathrm{pC}∕\mathrm{N}$ turns out to be in good agreeme…
Gal1p of Saccharomyces cerevisiae is capable of performing two independent cellular functions. First, it is a key enzyme in the Leloir pathway for galactose metabolism where it catalyzes the conversion of alpha-d-galactose to galactose 1-phosphate. Second, it has the capacity to induce the transcription of the yeast G…
p -type Zn1−xMgxO films doped with N and Al have been deposited by means of introducing Mg into p-type N- and Al-doped ZnO films using ultrasonic spray pyrolysis (USP) method. The structure of the films is confirmed by x-ray diffraction. Hall-effect measurements indicate that the p-type Zn1−xMgxO film shows a low resi…