Materials Literature
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Abstract Highly oriented monofilaments were produced by a high‐temperature die‐drawing process followed by tensile drawing. It was shown that a successful high‐speed process required high‐quality melt‐extruded rod. The mechanical properties and structure of the die‐drawn products were investigated by means of tensile…
Abstract Poly(vinyl alcohol) (PVA) films filled with different amounts of CrF 3 and MnCl 2 were prepared by the casting method. Differential scanning calorimetry (DSC) and X‐ray diffraction (XRD) analysis were used to study the changes in the structure properties that occurred because of filling. The changes occurring…
Lactose permease with Cys154 --> Gly (helix V) binds substrate with high affinity but catalyzes little or no transport. The purified, detergent-solubilized mutant protein exhibits much greater thermal stability than the wild type and little tendency to aggregate. Stabilization is also observed in vivo with an unstable…
Abstract Multi‐angle laser light scattering (MALLS) was used to characterize birch kraft pulps with respect to their absolute molecular mass distributions (MMDs). The pulps were dissolved in lithium chloride/ N , N ‐dimethylacetamide and separated by size exclusion chromatography (SEC). The weight‐average and number‐a…
Abstract Chemists' fascination with dendrimers mainly originates from their unique architecture and its exploitation for the design of well‐defined functional macromolecules. Depending on the nature of the synthesis, functionalization is traditionally introduced at the core, the periphery, or both. However, the specif…
The syntheses of several new simple negative, a simple positive, and multiple negative photochromes containing the dihydropyrene-cyclophanediene photochromic system are described. The photo-openings of the negative photochromes, the [e]-annelated benzo (7), naphtho (9), anthro (11), furano (19), and triphenyleno (15)…
Within the mode-coupling theory for idealized glass transitions, we study the evolution of structural relaxation in binary mixtures of hard spheres with size ratios delta of the two components varying between 0.5 and 1.0. We find two scenarios for the glassy dynamics. For small size disparity, the mixing yields a slig…
It is argued that the prevailing definition of quasicrystals, requiring them to contain an axis of symmetry that is forbidden in periodic crystals, is inadequate. This definition is too restrictive in that it excludes an important and interesting collection of structures that exhibit all the well-known properties of q…
The treatment of degenerate states within Kohn-Sham density functional theory (KS-DFT) is a problem of longstanding interest. We propose a solution to this mapping from the interacting degenerate system to that of the noninteracting fermion model whereby the equivalent density and energy are obtained via the unifying…
A new class of self-assembling peptides based on cyclic peptides made of alternating 3-aminocyclohexanecarboxylic acid (gamma-Acc) and alpha-amino acids is described. The studied cylindrical assemblies are models for a new class of self-assembling peptide nanotubes (SPN) that present the particular property of having…
The ability of polymers displaying lower critical solution temperatures (LCSTs) to mediate bioadsorptive processes was assessed. Three carboxyl-terminated polymers P1 − 3 with LCSTs respectively of 20, 32, and 42 °C were prepared by free-radical polymerization of N -isopropylacrylamide with and without comonomers acry…
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The deposition of Cu at room temperature on a Cr 2 O 3 (0001) substrate is studied by x-ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy and low-energy-electron diffraction. The results indicate that at RT Cu is highly dispersed on the substrate at initial deposition. X-ray induced Auger spectra,…
Maltose-binding protein (MBP or MalE) of Escherichia coli is the periplasmic receptor of the maltose transport system. MalE31, a defective folding mutant of MalE carrying sequence changes Gly 32-->Asp and Ile 33-->Pro, is either degraded or forms inclusion bodies following its export to the periplasmic compartment. We…
Abstract Two new paramagnetic transition metal complexes that contain the bridging ligand azo‐2,2′‐bipyridine (abpy) have been prepared and characterized by X‐ray crystallography and magnetic susceptibility measurements. The compound [Ni 2 (μ‐abpy)(CH 3 CN) 2 (NO 3 ) 4 ]·2CH 3 CN ( 1 ·2CH 3 CN) crystallizes in the tri…
Abstract Reaction of Ni(ClO 4 ) 2 ·6H 2 O with bis(3‐aminopropyl)amine (dpt) and ammonium thiocyanate produces the novel thiocyanato‐bridged nickel( II ) compound [Ni(μ‐NCS)(dpt)(NCS)] 2 [Ni(μ‐NCS)(dpt)(NCS)] 4 , which has been structurally characterised. The structure determination reveals that there are two differen…
Abstract The donor‐acceptor complexes with a vinylogue monohydro sesquifulvalene and sesquifulvalene backbone of the type [(η 5 ‐C 5 H 5 )Ru{µ‐(η 5 ‐C 5 H 4 )C 2 H 2 (η 6 ‐C 7 H 7 )}ML](PF 6 ) n [ n = 0: ML = none ( 1 ), Cr(CO) 3 ( 2 ); n = 1: ML = Ru(η 5 ‐C 5 H 5 ) ( 3a ), Ru(η 5 ‐C 5 Me 5 ) ( 3b )] and [(η 5 ‐C 5 H…
A number of experimental and computational studies of materials have shown that transport rates in domain walls may significantly differ from those in the bulk. One possible explanation for enhanced transport in a domain wall is that the domain wall is elastically soft with respect to the bulk. We investigate the soft…
Lysine, poly-lysine and lysozyme were successfully intercalated in the MnPS3 layered phases. Intercalates were characterised by elemental and thermogravimetric analysis, and X-ray powder diffraction. Biomolecules conformation between the layers appears to result from the optimisation of the host–guest interactions. Mo…
Abstract Stepwise cross‐coupling reactions between functionalized metallo synthons and bipyridine‐ or terpyridine‐based building blocks afford novel photoactive, hybrid complexes bearing multiple chromophores that function separately or cooperatively according to the nature of the coordinated metal cations. (© Wiley‐V…