Materials Literature
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Application of porous polymer materials to novel bio-interfaces for tissue engineering scaffold and artificial organs including blood filters, dialyzer, and oxygenator membranes have been in progress. The present study describes the fabrication and characterization of self-organized highly regular porous polymer films…
A limited combinatorial strategy was used to synthesize a small library of soft lipid-based materials ranging from structurally unordered fibers to highly uniform nanotubes. The latter nanotubes are comprised of a bilayer structure with interdigitated alkyl chains associated through hydrophobic interactions. These tub…
In this paper we describe a methodology for applying conventional morphological characterization techniques to some of the manufacturing processes of natural fibre reinforced thermoplastics (NFRTP). The composites studied consisted of a matrix of polypropylene or polyethylene, and of discrete jute, sisal and other nat…
A detailed study has been conducted of the sorption of ethylene and 1-hexene in linear low density polyethylene (LLDPE) under typical gas phase LLDPE reactor conditions. The recently proposed osmotic ensemble hyperparallel tempering method is used to simulate ethylene and 1-hexene gas sorption in the polymer samples.…
Fluorescent semiconductor materials doped with rare earth ions have been synthesized by flocculation of colloidal titania nanosheets, Ti0.91O2, with Eu3+ or Tb3+ ions. The composites had a lamellar structure with a gallery height of 1.06nm, accommodating rare earth ions between the nanosheets with a doping concentrati…
A 47-year-old woman presented with a 2-month history of progressive tightening of the skin on her legs. The tightening of her skin had begun 2 weeks after she was hospitalized for acute renal failure precipitated by therapy with nonsteroidal anti-inflammatory drugs. She had no history of renal disease or medical condi…
5,10,15,20-Tetrakis(4-sulfonatophenyl)porphinato iron(III) (Fe(III)TPPS) forms a very stable 1:2 complex with heptakis(2,3,6-tri-O-methyl)-beta-cyclodextrin (TMe-beta-CD), whose iron(III) center is located at a hydrophobic cleft formed by two face-to-face TMe-beta-CD molecules. Various inorganic anions (X(-)) such as…
Raman scattering spectra of the RbMnCl3 crystal have been studied under ambient conditions and under high hydrostatic pressure. The results produced have been interpreted with the ab initio model. The experimental data agree well with the estimated values in the low frequency range and show a slightly worse agreement…
The dependence of characteristics of a stratified Luneberg lens on the layer parameters has been studied in numerical experiments using a mathematical model based on the rigorous solution of the electrodynamic problem of diffraction on a multilayer sphere.
Protein crystallization has been studied in presence or absence of buoyancy-driven convection. Gravity-driven flow was created, or suppressed, in protein solutions by means of vertically directed density gradients that were caused by generating suitable temperature gradients. The presence of enhanced mixing was demons…
The universal formulation of Urbach's rule in solids has been considered in terms of the single-phonon approach. The “crystalline” and “glassy” variants of this rule, which are obtained on the basis of different ratios of contributions from the dynamic and static types of disorder, have been discussed with using some…
This study reported in this paper was aimed at testing the shear cell that was developed for the satellite mission Foton-M1 to measure diffusion coefficients in liquid metals under microgravity (microg)-conditions. Thick Layer diffusion experiments were performed in the system Sn90In10 versus Sn under 1 g-conditions.…
Thermoluminescence characteristics of two subsidiary glow peaks, one below 100°C and the other above 300°C, have been studied for measurements between 30°C and 500°C in α-Al 2 O 3 :C. The thermoluminescence Intensity of thelower temperature peak decreased with storage with a half-life of about 150 s. In contrast, the…
We present a model of the phytoplankton dynamics. The distribution of the size of the phytoplankton aggregates is described by a non-linear transport equation that contains terms responsible for the growth of phytoplankton aggregates, their fragmentation and coagulation. We study asymptotic behaviour of moments of the…
Two oxy-cuspidine series, RE 4 (Ga 2 O 7 )O 2 (RE = La, Nd, Sm) and La 4 (Ga 2 - x Ge x O 7+ x /2 )O 2 ( x = 0.2, 0.4, 0.6), have been prepared as single phases. The room-temperature crystal structures have been determined from joint Rietveld refinements of neutron and laboratory X-ray powder diffraction data for La 4…
Liposomes, which are vesicles composed of a phospholipid bilayer surrounding an aqueous milieu, represent a new strategy for anticancer drug delivery. Extravasation and accumulation of liposomal drugs within neoplastic tissues are possible because of the leaky vasculature and scarce lymphatic vessels of tumours (the e…
Precursor nanoparticles of complex lanthanide phosphors with binary and ternary composition are made using the inverse miniemulsion process. These particles show a high colloidal and compositional stability and are used to obtain inorganic crystalline films which can be very thin and highly homogeneous in topography a…
In order to investigate the mechanical relaxation behavior of the Zr 36 Ti 24 Be 40 amorphous alloy, the dynamic mechanical properties were measured using dynamic mechanical analyzer (DMA). From the data collected during isothermal multi-frequency dynamic mechanical measurements, the master curves for storage and loss…
The effect of different carbon sources (propionate, acetate, butyrate and glucose) on an enhanced biological phosphorus removal biomass developed with propionate as the sole carbon source was studied. Firstly, a group of different cycle studies was carried out using each substrate independently and then, another cycle…
The charging effect of an insulating specimen from electron beam (e-beam) irradiation may be utilized to facilitate imaging in the scanning electron microscope (SEM). This has been confirmed by a great deal of experimental work during the last three decades. Particularly, recent investigations indicate that even locat…