Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract An alloy of Cu–9at.%Al(111) has been oxidized in a low‐energy electron diffraction (LEED)/AES and a scanning AES instrument at elevated temperatures. Dosing with 1300 L of oxygen at 995 K gives rise to well‐ordered oxide layer formation on the Cu–9at.%Al alloy. The structure of the ordered oxide confirmed by…
In magnetically controlled shape memory (MSM) materials deformation can be controlled by magnetic field. It is shown that the magnetic field induced strain is directly connected with the twinning stress, i.e. mechanical stress needed to transform the sample to single variant state. In cases where the magnetically-indu…
Abstract Chitosan was partially N ‐acylated by treatment with n ‐fatty acid anhydrides in a homogeneous solution in 2 vol.‐% aqueous acetic acid‐methanol (1:2 v/v). The degree of substitution (d.s.) for N ‐acyl groups in the water‐soluble N ‐acylchitosan derivatives was in the range of 0.42–0.82 for N ‐acetyl, 0.37–0.…
A novel Polyacrylamide superparamagnetic iron oxide nanoparticle platform is described which has been synthetically prepared such that multiple crystals of iron oxide are encapsulated within a single Polyacrylamide matrix ( Poly Acrylamide Magnetic [PAM] nanoparticles). This formulation provides for an extremely large…
Imazalil and ethylenediamine-tetraacetic acid (EDTA) were incorporated into low-density polyethylene (LDPE) aimed at producing antimicrobial packaging films for foodstuffs. Moulded plates (thickness 2mm) containing 5% of EDTA inhibited Bacillus subtilis, whereas 0.05–0.25% of imazalil had strong activity against Asper…
Abstract The aim of this work is to study the structure‐properties relationship of rigid and plasticized PVC/PMMA blends. For that purpose, blends of variable compositions were prepared in the absence and in the presence of a plasticizer di (ethyl‐2 hexyl) phtalate or DEHP. The miscibility of the two polymers was inve…
Ni 49.7 Mn 29.1 Ga 21.2 magnetic shape memory sample showing magnetic-field-induced strain of 5.7 % in the magnetic field 0.5 T was studied at different conditions during austenite-martensite and martensite-austenite transformations. Transformation temperatures T A = 317 K, T M = 308 K were determined by AC susceptibi…
PURPOSE: We evaluated the efficacy of nephrectomy for the management of nephrogenic hypertension in children. MATERIALS AND METHODS: We retrospectively reviewed the records of 320 children who underwent nephrectomy between 1991 and 2001, and 22 underwent nephrectomy for the management of hypertension. Of the 22 patien…
Abstract Cerium(IV) mediated grafting of polyacrylonitrile on to guar gum was studied. Grafting parameters were studied gravimetrically, as a function of temperature, initiator concentration and Guar to acrylonitrile ratio. Higher temperatures resulted in higher monomer conversion and homopolymer formation. Both monom…
Rings and a few other things: A method for the preparation of uniform mesoscopic titanium dioxide rings that are bound in a periodic array on a substrate, linked to a free-standing membrane, or are dispersed as individual particles (see SEM image) is presented. The technique is based on the selective wetting of the in…
The goal of the present study was to investigate HER-2-targeted boron-containing liposomes as a potential drug delivery vehicle for boron neutron capture therapy (BNCT). Trastuzumab was conjugated to the distal end of PEG-DSPE-NHS in micelles and the Trastuzumab-PEG-DSPE were then transferred to preformed liposomes, e…
A convenient synthesis of peripherally substituted or unsubstituted phthalocyanines having a variety of metals is described. Phthalocyanines can be obtained by heating phthalimides or phthalic anhydride with metal salts, hexamethyldisilazane, a catalytic amount of p-TsOH, and DMF at 150 degrees C.
We present a unique method for real-time polarization measurement by use of a discrete space-variant subwavelength grating. The formation of the grating is done by discrete orientation of the local subwavelength grooves. The complete polarization analysis of the incident beam is determined by spatial Fourier transform…
In order to investigate the localized electronic states in hydrogenated amorphous carbon (a-C : H) films, the temperature and electric field dependences of the current density have been measured in low-field coplanar (Al/a-C : H/Al) and in high-field transverse (TiW/a-C : H/TiW) geometries. The very-low-field conducti…
Abstract Hydrotalcite-like layered double hydroxides (LDHs) containing different ratios of Ni 2+ , Cu 2+ , Mg 2+ and Al 3+ in the layers have been prepared by a new method, the key features of which are a very rapid mixing and nucleation process in a colloid mill followed by a separate ageing process. The compositions…
We report the crystal structures and biophysical characterization of two stabilized mutants of the Drosophila Engrailed homeodomain that have been engineered to minimize electrostatic repulsion. Four independent copies of each mutant occupy the crystal lattice, and comparison of these structures illustrates variation…
In our recent brief communicaton, we have proposed a new method for the evaluation of the pore entrance size in silicas and other materials with cage-like mesopores. This method is based on the modification of the material with ligands that are capable of forming a dense monolayer chemically bonded on the surface. The…
Three criteria are evaluated to assess the potential of a dendrimer based on triazines, 1, for use as a vehicle for drug delivery. These criteria are: (1) its ability to solubilize small hydrophobic guests as measured spectrophotometrically; (2) its ability to deliver a drug in vitro as evaluated using a gene reporter…
Arginase is a binuclear manganese metalloenzyme that catalyzes the hydrolysis of L-arginine to form L-ornithine plus urea. Chiral L-amino acids bearing sulfonamide side chains have been synthesized in which the tetrahedral sulfonamide groups are designed to target bridging coordination interactions with the binuclear…
Abstract A novel low-dimensional molecular conductor, [PXX][FeIII(Pc)(CN)2], has been synthesized. This salt contains the magnetic FeIII ion (S = 1/2), and is isomorphous with [PXX][CoIII(Pc)(CN)2] which includes the non-magnetic CoIII ion. In both salts, the [MIII(Pc)(CN)2] (M = Fe or Co) units form a two-leg ladder…