Materials Literature
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The aim of this study is to developed solid dispersion self emulsification pellets (SDSEP). This is a recent technique for poorly water soluble drugs, where it increase water solubility and enhances the bioavailability. A 3 2 full factorial design approach was used for the optimization of MCC: Lactose (X1) and % of cr…
The manufacture of polymeric solid foams with an engineered distribution of mechanical properties has been possible by irradiating ultrasound on a viscoelastic reacting mixture.Structures with a heterogeneous pore size distribution offer great advantages when compared to homogeneous distributions in many applications…
The objective of this study is to characterize and analyse defects in solar cell devices. Materials used to fabricate solar cells are not defects free and therefore, there is a need to investigate defects in cells. To investigate this, a topographical technique was developed and employed which uses a non-destructive m…
Complex formation of 15-crown-5 ether containing monoand bis(styryl)bipyridine with transition metal perchlorates was studied. The complex stoichiometry, complex structure and stability constants were determined by electronic spectroscopy. The influence of metal ions on occurrence of E,Z-isomerization was analyzed; th…
In this work the electron paramagnetic resonance (EPR) spectra of Al2O3 powders were measured for different sizes of grains (# 200, # 325) as well as the mullites (0.007 and 0.012). The measurements were performed at room temperature and in the temperature range from 140 K up to 380 K. The main purpose of this work wa…
The study presents an evaluation of the effect of microstructure of low-alloy spheroidal cast iron on impact strength within the temperature range from –60 to 100°C. Analyses were conducted on one type of cast iron containing 0.51% Cu and 0.72% Ni. Cast iron was austempered or normalized. Values of KCV and static mech…
Plasmachemische Methoden sind geeignet, um chemisch inerte Polyolefinoberflachen zu funktionalisieren. Meist entsteht jedoch dabei eine grose Vielfalt verschiedener funktioneller Gruppen. Fur Pfropfreaktionen an diesen Gruppen, aber auch fur hoherwertige Anwendungen ist die Existenz einer hochdicht mit einer einzigen…
С использованием подрешеточной модели проведен термодинамический анализ трехкомпонентной системы хром-никель—азот. Результаты расчета равновесных состояний системы представлены в виде изотермических сечений и фазовых диа грамм. Рассчитаны и построены политермические разрезы фазовых диаграмм с по стоянным значением к…
Several recent studies (J. Phys. Chem. A 2004, 108, 5479; J. Comput. Chem. 2007, 28, 2431) have shown impressive results when replacing the non-empirical PBE density functional by the empirical OPBE or OLYP functionals, i.e. replacing the PBE exchange functional by Handy and Cohen’s OPTX functional. To investigate the…
This paper reports morphological properties of porous silicon and oxidizedporous silicon, prepared by photo electrochemical etching from n-type silicon wafers asa function of experimental parameters. Scanning electron microscopic (SEM)Observations of porous silicon layers were obtained before and after rapid thermalox…
Lead is one of the poisonous heavy metals that affects the biotic system. In this research, the toxic effects of different concentrations of triethyllead chloride( TriEL ) was studied on the acellular slime mold Physarum polycephalum cytoplasmic shuttle streaming, growth, structure and migration of Physarum plasmodium…
Nearly monodisperse cobalt ferrite (CoFe2O4) nanoparticles without any size-selection process have been prepared through an alluring method in an oleylamine/ ethanol/water system. Well-defined nanospheres with an average size of 5.5 nm have been synthesized using metal chloride as the law materials and oleic amine as…
Recently, Controlled pressure Scanning Electron Microscope (CP-SEM) and associate microanalysis showed the enormous utility in several fields using materials. Image quality and microanalysis results are strongly related to the size of the electron beam which depends on the pressure in the chamber and the kind of the g…
New complexes of nickel(II) have been prepared in t he reaction mixture of nickel(II) acetate, ethanolamine and 5-X salicylaldehyde (X= Br, Cl). Diaquabis(2-hydroxyethylimino)methyl)-4bromophenolato)nickel(II) and Diaquabis(2-hydroxyet hylimino)methyl)-4-chlorophenolato)-nickel(II) were characterized by elemental anal…
We demonstrate a lateral patch-cramp device structure, made of fused silica, whose patch pipettes were fabricated by using femtosecond laser irradiation and wet etching. The pipettes were an oval-shaped cross-section that was 200 nm ×� 4 µm, and the minor axis can be controlled on the nano-scale. It is expected that a…
Laterally loaded single piles are usually analyzed by methods deriveddirectly from the classical beam on elastic foundation or Winkler soil model. Soilstrength is characterized using modulus of sub-grade reaction.Early solutions that employed Winkler’s model assumed that the modulus ofsub-grade reaction is constant wi…
Evidence is presented on instability of the electron beam irradiated glass 51.5SiO2. 25.6 B2O3 4.3 Li2O 8.6 Na2O 4CeO2 4ZrO2 2Cr2O3 (mol%). Irradiation of this glass in a TEM JEM 3010 by a 300 keV e-beam resulted in a phase decomposition characterised by a continuous variation of concentrations with diffuse interfaces…
X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, 29 Si and 27 Al nuclear magnetic resonance and thermogravimetric analyses have been used to examine the synthesis of zeolite LTA and associated phases from metakaolinite. However, the synthesis product was controlled by the exper…
The concept is based on the recognition that nanometer sized inert inorganic particles, such as nanometer sized clay particles, can be incorporated into a polymeric host carrier, in order to control the diffusion rate of a dispersed slow-release material. A nano-clay particle reduces the porosity of the polymer, or ot…
In order to investigate the effect of zinc oxide nanoparticles on survival, reproduction, absorption, weight gain and accumulation in Eisenia foetida earthworm tissues, the 4 ×2 factorial experiment in the Randomized Complete Block Design in 3 iterations was done. The factors were consisted of zinc oxide NPs at four l…