Materials Literature
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The suitability of protein-coupled liposomes as drug carriers for brain specific targeting was investigated using albumin (BSA) and cationized albumin (CBSA), respectively, as model proteins. Liposomes coated with polyethylene glycol (sterically stabilized, PEG-liposomes) were prepared from phosphatidylcholine, choles…
Nanocrystalline NiO thin-film electrodes were prepared by reactive pulsed laser ablation of a metallic Ni target in an oxygen ambient. X-ray diffraction (XRD) and scanning electron microscopy measurements demonstrated that the films deposited on stainless steel substrate exhibited nanocrystalline structure with averag…
Many methods for the determination of the order parameter in nematic liquid crystals are known. However, most of them are not applicable to cholesteric and smectic phases. Therefore, experimental data on the order parameter in cholesteric and smectic phases are hardly available. To determine the orientational order pa…
The virulence of a urease-negative mutant of uropathogenic Proteus mirabilis and its wild-type parent strain was assessed by using a CBA mouse model of catheterized urinary tract infection. Overall, catheterized mice were significantly more susceptible than uncatheterized mice to infection by wild-type P. mirabilis. A…
An electromagnetic study of the staircase approximation of arbitrary shaped gratings is conducted with three different grating theories. Numerical results on a deep aluminum sinusoidal grating show that the staircase approximation introduces sharp maxima in the local field map close to the edges of the profile. These…
Using pure Ti powder with particle sizes from 300 to 500 \\micron prepared by the plasma rotating electrode process (PREP), porous pure Ti compacts for biomedical applications were synthesized by powder sintering, and microstructures and mechanical properties of the compacts were investigated in this study. Porous com…
Luminescent Y3Al5O12∶Ce3+ (YAG∶Ce3+) ceramics with nanometer- to micronmeter-sized particles were prepared by a new sol–gel pyrolysis method. Notwithstanding thermochemical considerations, the combined fuel system of urea and poly(vinyl alcohol) (PVA) yielded nanoparticles exhibiting single-crystal features. This can…
In recent years, various methods have been developed for the synthesis of single phase ferrite nanomaterials. Most approaches involve the use of high temperatures, or the preparation of powders. Ceramic/metal nanocomposites and composite thin films have attracted much attention because of their unique mechanical, elec…
The photoluminescence (PL) of CdSe quantum dots (QD) in aqueous media has been studied in the presence of gold nanoparticles (NP) with different shapes. The steady state PL intensity of CdSe QD (1.5-2 nm in size) is quenched in the presence of gold NP. Picosecond bleach recovery and nanosecond time-resolved luminescen…
Cellulosic fibers have been used as cost-cutting fillers in plastic industry. Among the various factors, the final performance of the composite materials depends to a large extent on the adhesion between the polymer matrix and the reinforcement and therefore on the quality of the interface. To achieve optimum performa…
Abstract The oxidation state of iron (Fe) in the crystal structure of smectite clay minerals profoundly alters their physical-chemical properties. Among the properties affected are layer charge, cation exchange and fixation capacity, swelling in water, particle size, specific surface area, layer stacking order, magnet…
With the use of a grafting-coating method, three kinds of natural macromolecules, that is, gelatin, collagen, or chitosan, were immobilized on poly-L-lactic acid (PLLA) membrane surfaces with the goal of improving of cellular interactions. Attenuated total reflectance infrared spectroscopy (ATR-IR), x-ray photoelectro…
Biomolecules labeled with luminescent colloidal semiconductor quantum dots (QDs) have potential for use in numerous applications, including fluoro-immunoassays and biological imaging. QD labels exhibit size-tunable narrow-band luminescent emission and high resistance to photodegradation. They also exhibit efficient Fö…
The purpose of this study was to characterize the surface oxide films on 316L austenitic stainless steel located in various environments to estimate the reconstruction of the film in human body. Five kinds of specimens were prepared according to the following methods: polished in deionized water, autoclaved, immersed…
The influences of temperature and chloride concentration on pitting corrosion of stainless steel AISI 304 were investigated. Conventional large-scale measurements (sample diameter, were conducted to study the effect of temperature on pit initiation, metastable and stable pitting in 0.1 M and in 0.1 M NaCl solutions at…
Abstract Metal‐polymer composites based on polyethylene (PE), polyoxymethylene (POM), polyamide (PA) and a PE/POM blend as matrix and dispersed iron (Fe) as filler have been prepared by extrusion of the appropriate mechanical mixtures, and their electrical conductivity, dielectric properties and thermal conductivity h…
The mean-field Landau-type theory is used to analyze the polarization properties of epitaxial ferroelectric thin films grown on dissimilar cubic substrates, which induce biaxial compressive stress in the film plane. The intrinsic effect of the film surfaces on the spontaneous polarization is taken into account via the…
(EDO-TTF)2PF6 shows a novel metal–insulator phase transition, which complies with the cooperative features of the Peierls transition, charge ordering, and anion ordering.
The electronic structure of the perovskite La1−xSrxCoO3 has been obtained as a function of Sr substitution and volume from a series of generalized-gradient-corrected, full-potential, spin-density-functional band-structure calculations. The energetics of different spin configurations are estimated using the fixed-spin-…
Chitosan oligosaccharides (COSs) were prepared and fractionated into three groups of COS [a high molecular weight COS (HMWCOS), medium molecular weight COS (LMWCOS), and low molecular weight COS (LMWCOS)] according to their molecular weight, using an ultrafiltration membrane enzymatic bioreactor designed earlier [8].…