Materials Literature
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Nanometric ammonium aluminum carbonate hydroxide (AACH) with a particle size less than 5 nm was produced from ammonium aluminum sulfate and ammonium hydrocarbonate under an optimized adding condition, and phase transformations of the AACH on heating and the effect of α‐Al 2 O 3 seeding on the transformation kinetics w…
Abstract The size of quaternary <mml:math xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mnf="http://cambridge.org/core/manifest" xmlns:cup="http://contentservices.cambridge.org" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:m="http://cambridge.org/core/metadata" xmlns:core="http://cambridge.org/core" xmlns:c…
Abstract The soot combustion process promoted by some of the most promising diesel particulate combustion catalysts (Cs 2 O·V 2 O 5 , Cs 4 V 2 O 7 , CsVO 3 ) is discussed on the grounds of a theoretical analysis and an experimental test campaign involving reaction runs in microreactors (either in isothermal or in temp…
We show that finite-size scaling techniques can be employed to study the glass transition. Our results follow from the postulate of a diverging dynamical correlation length at the glass transition whose physical manifestation is the presence of dynamical heterogeneities. We introduce a parameter B(T,L) whose temperatu…
We present the circuit equivalent of the Landau-Khalatnikov dynamical ferroelectric model. The differential equation for hysteretic behavior is subject to numerical computer simulations. The size and shape of the simulated hysteretic loops depend strongly on the frequency and the amplitude of the driving electric fiel…
This study investigates the influence of cyclic tensile strain, applied to fully contracted fibroblast-seeded collagen constructs. The constructs were preloaded to either 2 or 10 mN. The preloaded constructs were subsequently subjected to a further 10% cyclic strain (0-10%) at 1 Hz, using a triangular waveform, or wer…
Abstract DTPA‐bisamide derivatives with alkyl chains containing 14, 16 and 18 carbon atoms were synthesized and complexes of various trivalent lanthanide ions (Ln = Gd, La, Pr, Eu) were formed. Variable temperature proton NMR spectroscopy of paramagnetic praseodymium( III ) and europium( III ) complexes revealed that…
Galactokinase plays a key role in normal galactose metabolism by catalyzing the ATP-dependent phosphorylation of alpha-D-galactose to galactose 1-phosphate. In humans, mutations in the galactokinase gene can lead to the diseased state referred to as Type II galactosemia. Here we describe the three-dimensional structur…
β-Cyclodextrin (β-CD) and γ-cyclodextrin (γ-CD) formed inclusion complexes with poly(dimethylsilane)s (PSi) of various molecular weights to give crystalline compounds. However, α-cyclodextrin (α-CD) did not form complexes with PSi of any molecular weight. The yields of the β-CD−PSi inclusion complexes decreased with i…
A brief survey of host–guest interactions involving dendritic architectures is presented. Discussion begins with an examination of early examples of branched motifs described as ‘micelle-like’ and progresses through to current investigations of unimolecular micelles and their attendant supramolecular properties.
4(R)-Hydroxyproline in the Yaa position of the -Gly-Xaa-Yaa-repeated sequence of collagen plays a crucial role in the stability of the triple helix. Since the peptide (4(R)-Hyp-Pro-Gly)10 does not form a triple helix, it was generally believed that polypeptides with a -Gly-4(R)-Hyp-Yaa-repeated sequence do not form a…
Electromigration in Cu Damascene lines with bamboo-like grain structures, either capped with Ta/TaN, SiNx, SiCxNyHz layers, or without any cap, was investigated. A thin Ta/TaN cap on top of the Cu line surface significantly improves electromigration lifetime when compared with lines without a cap and with lines capped…
Edible films based on gluten from four types of Brazilian wheat gluten (2 "semi-hard" and 2 "soft") were prepared and mechanical and barrier properties were compared with those of wheat gluten films with vital gluten. Water vapor, oxygen permeability, tensile strength and percent elongation at break, solubility in wat…
We show that the rheology of a silazane‐based precursor for a silicon carbonitride ceramic can be radically altered by reacting it with an alkoxide precursor. This modified precursor can be drawn into fibers by a simple process. The fiber‐friendly rheology of the modified precursor is ascribed to the creation of linea…
NAD + is the oxidized form of the coenzyme redox pair NAD + /NADH and plays a main role in catalysis of biological processes. Accurate X-ray diffraction data have been collected at 100 K from a crystal of the free acid form of the coenzyme NAD + with a CCD area detector up to 0.55 Å resolution. A multipole refinement…
A combined structural study on ternary phosphate glasses (MnO)x(NaPO3)1−x, x = 0.0, 0.024, 0.048, 0.167, is performed using X-ray diffraction, EXAFS and Raman spectroscopy. The mean Mn-O nearest-neighbour distance and the Mn-O coordination number in the glass with 16.7 mol% MnO are 2.15(2) °A and 5.7±0.4, respectively…
On-line partial discharge (PD) detection of three-phase belted medium voltage cable connections results in a number of interpretation differences as compared to off-line measurements where only one phase is energized. The induced currents and charges in the phase conductors and earth screen upon a PD not only depend o…
We describe some of our principal results on the thermo- piezo- and magneto-switching of spin crossover phenomenon in inorganic molecular materials: experimental properties, theoretical approaches and channels for molecular memory devices.
A tridentate ONN donor ligand, 5-methyl-3-(2-hydroxyphenyl)pyrazole; H2L, was synthesized by reaction of 2-(3-ketobutanoyl)phenol with hydrazine hydrate. The ligand was characterized by IR, 1H NMR and mass spectra. 1H NMR spectra indicated the presence of the phenolic OH group and the imine NH group of the heterocycli…
Aluminum (Al) doped ZnO (AZO) films were grown on sapphire substrate via oxygen radical assisted molecular beam epitaxy (MBE) technique. The results of XRD measurement and temperature dependence Hall measurement confirmed that the AZO films were typically highly degenerate semiconductor with good crystallinity. The op…