Materials Literature
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Abstract The synthesis of transition metal spin‐clusters has become an important sub‐discipline of coordination chemistry, especially since the discovery of single‐molecule magnets (SMMs) in the early nineties. In this context, complexes with high spin‐numbers and large anisotropy are particularly desired. The use of…
We report a detailed crystal field analysis of ${\mathrm{Pm}}^{3+}$ and ${\mathrm{Sm}}^{3+}$ as well as lattice location studies of $^{147}\mathrm{Pm}$ and $^{147}\mathrm{Nd}$ in 2H-aluminum nitride $(w\text{\ensuremath{-}}\mathrm{AlN})$. The isotopes of mass 147 were produced by nuclear fission and implanted at an en…
Herein we report a complete family of conformationally restricted PProDOT derivatives with varying alkylene tether lengths. It was found that variation of the tether length and structure of the electropolymerizable monomer was successful in the fine-tuning of the electrochemical and optical properties of the subsequen…
ADP-Glc pyrophosphorylase (PPase), a key regulatory enzyme in the biosynthetic pathway of starch and bacterial glycogen, catalyzes the synthesis of ADP-Glc from Glc-1-P and ATP. A homology model of the three-dimensional structure of the Escherichia coli enzyme complexed with ADP-Glc has been generated to study the sub…
We have studied magnetic interactions in zinc-blende MnAs as a function of volume by ab initio density-functional calculations. The calculated Heisenberg pair-exchange parameters show a strong volume dependence. The calculated Curie temperatures, obtained by Monte Carlo simulations using ab initio parameters and a cla…
Abstract Edible films can be produced from kafirin but the diverse food product requirements necessitate modification of the films. To modify their functional properties, kafirin films were cast, with and without plasticizer, from glacial acetic acid (GAA) and aqueous ethanol (AE), then heated using microwave energy.…
In this work, experimental data points from which the profile of the order parameter of nematic liquid crystals can be obtained, mainly magnetic susceptibility anisotropy and dielectric anisotropy, will be used to show that when rescaled they coalesce along a common line that extends from the nematic-isotropic phase t…
Instabilities play a central role in the physics of foams. Some that change the topology of a dry foam are indicated by the laws promulgated by Plateau in his 1873 book. Their occurrence is less clearly predictable in wet foams. Various other instabilities are related to gravitational loading and gas compressibility.…
A novel type of fluorescent and anisotropic polysilsesquioxane xerogel ( CNPBESi ) was synthesized by the acid-catalyzed classical sol−gel reaction of organically modified silicates. Anisotropy and enhanced fluorescence emission were simultaneously induced by the strong self-assembly power of the organic bridge units.…
This paper investigates the thermodynamic potential of the integration of molten carbon fuel cell (MCFC) technology with gas turbine systems for small-scale (sub-megawatt or sub-MW) as well as large-scale (multi-MW) hybrid cycles. Following the proposals of two important MCFC manufacturers, two plant layouts are discu…
We present an x-ray diffuse scattering study of the charge-density wave (CDW) structure in the doped blue bronzes ${\mathrm{K}}_{0.3}({\mathrm{Mo}}_{1\ensuremath{-}x}{\mathrm{V}}_{x}){\mathrm{O}}_{3}$ $(x=2.8%)$, ${\mathrm{Rb}}_{0.3}({\mathrm{Mo}}_{1\ensuremath{-}x}{\mathrm{V}}_{x}){\mathrm{O}}_{3}$ ($x=1.44%$ and 0.2…
Composites with compositions ( x )Ni 0.8 Cu 0.2 Fe 2 O 4 + (1 − x )Ba 0.9 Pb 0.1 Ti 0.9 Zr 0.1 O 3 , in which x varies as 0, 0.15, 0.30, 0.45 and 1 mol%, were prepared by a standard ceramic technique. X-ray diffraction was used to carry out the structural analysis. The microstructural analysis was carried out by scann…
Abstract Combined in situ rheo‐SAXS (small‐angle X‐ray scattering) and ‐WAXD (wide‐angle X‐ray diffraction) studies using couette flow geometry were carried out to probe thermal stabilty of shear‐induced oriented precursor structure in isotactic polypropylene (iPP) at around its normal melting point (162 °C). Although…
We suggest that additional depression of the phonon conductivity $\ensuremath{\kappa}$ at its peak value due to plastic deformation of close-packed structures might well be caused by phonon scattering by stacking faults and the dislocation cores. These two scattering processes would give rise to respectively ${\ensure…
International audience
Abstract Poly( L ‐lactic acid) (PLLA), poly(ε‐caprolactone) (PCL), and their films without or blended with 50 wt% poly(ethylene glycol) (PEG) were prepared by solution casting. Porous films were obtained by water‐extraction of PEG from solution‐cast phase‐separated PLLA‐ blend ‐PCL‐ blend ‐PEG films. The effects of PL…
The preparation of 2,7-linked carbazole polymers with 4-dialkylamino-phenyl substituents is presented. Poly(9-(4-dioctylamino-phenyl)-9 H -carbazole-2,7-diyl) P 1 and poly(3,6-dimethyl-9-(4-dioctylamino-phenyl)-9 H -carbazole- alt -9-(4-dioctylamino-phenyl)-9 H -carbazole-2,7-diyl) P 2 were prepared through a Suzuki c…
This study concerns the design of protein-resistant polymer adsorbed layers for the control of surface binding of biospecific recognition entities. Polymer surface layers were prepared using the adsorption of poly(allylamine hydrochloride) (PAH), poly(l-lysine) (PL), and branched and linear polyethyleneimine (PEI) and…
Methoxypoly(ethylene glycol)-oligo(aspartic acid) (MPEG-Asp(n)-NH(2), n = 2-5) hybrid block copolymers were synthesized and used as stabilizers to prepare superparamagnetic Fe(3)O(4) nanoparticles with magnetite as the inner core and and poly(ethylene glycol) as the hydrophilic outer shell. The aqueous dispersions of…
The effects of CaCl 2 and sucrose on the hydration of monoclinic and triclinic tricalcium silicate were studied using quasielastic neutron scattering and calorimetry. Aside from acceleration and retardation, other effects on the reaction were revealed including changes to the rate constant and the type and amount of h…