Materials Literature
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Abstract Red single crystals of Pt 2 (HSO 4 ) 2 (SO 4 ) 2 were obtained by the reaction of elemental platinum with conc. sulfuric acid at 350 °C in sealed glass ampoules. The crystal structure (monoclinic, P 2 1 / c , Z = 2, a = 868.6(2), b = 826.2(1), c = 921.8(2) pm, β=116.32(1)°, R all = 0.0348) shows dumbbell shap…
Regulated proteolysis is a key event in transmembrane signalling between intracellular compartments. In Escherichia coli the membrane-bound protease DegS has been identified as the periplasmic stress sensor for unfolded outer membrane proteins (OMPs). DegS inititates a proteolytic cascade resulting in the release of s…
To improve the performance of bioengineered skin, we used a recombinant retrovirus encoding FGF-7 to modify diploid human keratinocytes genetically. Control or FGF-7-expressing keratinocytes were seeded onto acellular human dermis to form bioengineered skin. Gene-modified skin secreted significant levels of FGF-7 and…
In this work, the influence of dipeptide composition on protein thermostability was studied. After comparing the normalized dipeptide composition between mesophilic proteins and (hyper)thermophilic proteins, we concluded that when organism optimal growth temperature increased, for archaeal proteins, the compositions o…
Abstract Conditions to achieve the palladium‐catalysed telomerization of butadiene with L ‐arabinose and D ‐xylose as telogens have been identified. With DMF as solvent, optimised ratios of substrate, reactants and catalytic system allowed the selective grafting of one octadienyl chain onto the anomeric hydroxy group.…
The stable solid polymorphism of cyclooctanol $({\mathrm{C}}_{8}{\mathrm{H}}_{16}\mathrm{O},$ for short ${\mathrm{C}}_{8}--\mathrm{OH})$ is revealed to be a complex problem and only two stable solid phases, denoted on cooling from the liquid as phases I and II, are found using static (thermodynamic and x-ray diffracti…
Chlorendic acid-based and tetrabromophthalate polyesters are major flame-retardant polyester resins, often used with antimony trioxide. For translucency, colloidal antimony pentoxide is preferred. Brominated diols are occasionally used. In the vinyl ester group, the adducts of acrylic or methacrylic acid with the digl…
Magnetic ordering around the ferroelectric transition temperature T C1 of weakly ferroelectric YMn 2 O 5 has been reinvestigated by single-crystal neutron diffraction and dielectric measurements. Besides a two-dimensionally modulated incommensurate magnetic (2D-ICM) phase with the propagation vector q = ( q x ,0, q z…
Abstract The temperature dependence of the vibrational modes of lead barium niobate (Pb x Ba 1– x Nb 2 O 6 ), which belongs to the tungsten‐bronze family of oxygen octahedra ferroelectrics, were investigated for the first time using the Raman scattering technique. The investigated sample ( x = 0.60) exhibits a ferro–p…
Spin-Crossover in Gelen: Thermoreversible, schaltbare Gele mit einstellbaren magnetischen, optischen und rheologischen Eigenschaften werden aus einer modifizierten polymeren Spin-Crossover-Vorstufe und Alkansolventien erhalten (siehe Bild). Das als Gelator fungierende Eisentriazolpolymer geht einen Spin-Crossover ein,…
We describe a broadband achromatic half-wave retarder for normally incident light of arbitrary polarization. The device consists of a stack of one nematic liquid-crystal cell with uniform alignment sandwiched between two twisted nematic layers that have identical twist angles (135 degrees) but different orientations o…
The kinetics of vaterite (CaCO 3 ) crystallization on calcite in the presence of aspartic acid was investigated by the constant composition technique. The presence of aspartic acid in the supersaturated solution stabilizes this calcium carbonated polymorph possibly through the development of active growth sites, which…
The longitudinal acoustic (LA) mode of bulk ${\mathrm{Ge}}_{x}{\mathrm{Se}}_{1\ensuremath{-}x}$ glasses is examined in Brillouin scattering (BS) over the $0.15<x<1/3$ range using near band-gap radiation ($\ensuremath{\lambda}=647.1\text{ }\mathrm{nm}$). The LA-mode frequency (${\ensuremath{\nu}}_{\mathrm{LA}}$)…
Phosphate is an essential nutrient that must be taken up from the growth medium through specific transporters. In Saccharomyces cerevisiae, both high and low affinity orthophosphate carriers allow this micro-organism to cope with environmental variations. Intriguingly, in this study we found a tight correlation betwee…
The structural and dynamic properties of dioctadecyldimethylammoniums (DODDMA) intercalated into 2:1 layered clays are investigated using isothermal−isobaric (NPT) molecular dynamics (MD) simulation. The simulated results are in reasonably good agreement with the available experimental measurements, such as X-ray diff…
The swelling behavior of thin polyelectrolyte multilayers assembled from poly(acrylic acid) and poly(allylamine hydrochloride) under various pH conditions was characterized in real time by in situ single wavelength ellipsometry. Both the rates and extent of swelling were found to be independent of the solution environ…
Abstract The transformation of MoO 3 induced by electron beam irradiation was studied by electron energy‐loss spectroscopy (EELS) in combination with electron diffraction and high‐resolution transmission electron microscopy (HRTEM) techniques. The routes of structure transformation were dependent on the applied electr…
We report on the controlled growth of novel self-assembled nanostructures (nanoaeroplanes, nanocombs, and tetrapod-like networks of zinc oxide) by a simple thermal evaporation technique in a single-stage furnace. Scanning electron microscopy and transmission electron microscopy are used to investigate their morphologi…
Mixtures of five-arm star polystyrene with an organoclay spontaneously formed exfoliated nanocomposites when annealed, validating a recent theoretical prediction by Singh and Balazs (Polym. Int. 2000, 49, 469.). An analogous linear polystyrene sample produced only an intercalated morphology under the same conditions.…
A synthetic glycolipid N -(11- cis -octadecennoyl)-β- d -glucopyranosylamine was employed for the fabrication of organic tubular structures with a cyclic hollow cylinder 30−50 nm wide through molecular self-assembly in water. Gold or silver nanoparticles encapsulated in the hollow cylinders of the lipid nanotubes (LNT…