Materials Literature
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In view of the high piezoelectric activity found on some cellular polymer electret films, polymeric space-charge electrets were studied more frequently during the last ten years. An alternative concept -between cellular electret materials and devices with non-porous electret films -are layer systems of porous and non-…
Damage to the surface layer of cotton fibers was observed. Cotton fibers were transformed to yarns in the classical and open-end spinning systems. Damage was observed using a scanning electron microscope JSM-5500LV f-my Jeol. The samples were chosen from the initial and final stages of the technological process. Seven…
Mesoporus silica dielectrics, which revealed low refractive index (n~1.27), were introduced together with Si3N4layers to be double-layer-based graded-refractive-index ant-reflectors for silicon solar-cells. Enhanced solar-light transmission increased conversion efficiency of Si solar panels by 2%.
Molecular dynamics simulation was used to analyze changes in the functionally significant structural elements of the crystal lattices of pT160-CDK2/cyclin and A/ATP-Mg 2+ /substrate complexes of the native (CDK2-G16) and mutant (CDK2-S16) active kinases at physiological temperatures (300 K). The structural rearrangeme…
This paper reports on the experimental results of investigations into the influence of the thermal prehistory of the sample on the height of the peak in the light scattering intensity after temperature jumps in the glass transition range of the STK-3 optical silicate glass. It is demonstrated that, as for germanate an…
This paper reports on the results of investigations into the radiation stability of tin charge states in the (As2Se3)1−z (SnSe) z − x (GeSe) x glasses. It is revealed using 119Sn Mössbauer spectroscopy that gamma irradiation of the (As2Se3)1−z (SnSe) z − x (GeSe) x glasses leads to partial oxidation of doubly charged…
The synthesis of a series of low-molecular-weight chitosans and the results of their bioassay against several phytopathogenic fungi are described.
Dye molecules doped polythiophene (PT) films prepared by electrochemical doping were investigated by Fourier transform infrared spectroscopy (FTIR) reflection absorption spectroscopy (RAS) and transmission in order to investigate whether the presence of an electric field could control the ordering of the dye molecule…
The relaxation behavior of the domain structure of a Rochelle salt crystal during its repolarization by a static electric field was studied over a wide temperature range (from −18 to +24°C). The field and temperature dependences of the relaxation time are found. It is shown that the difference between the activation e…
The lower divertor of the DIII-D tokamak has been modified to provide improved density control of the tokamak plasma during operation in a high triangularity double-null configuration. Union Carbide ATJ grade graphite tiles covering the new lower divertor and vessel floor were designed to have better tile-to-tile alig…
The DFT method was used to describe the electronic structure of the catalytically interesting (011) surface of molybdenum dioxide, with attention being particularly focused on the properties of the active sites, both molybdenum and oxygen, present at this surface. In addition, a comparison of (011)MoO 2 and (100)MoO 3…
Cordierite powders were synthesised with the use of MgO coming from two different mineral sources of talc and magnesite. The cordierite composition containing magnesite shows higher shrinkage and lower porosity when fired between 850 and 1350°C than the one containing talc. With the use of magnesite as MgO source, cor…
Abstract Reaction of 2,5‐bis(cyanomethyl)pyrrole with L ‐valinol in presence of zinc trifluoromethansulfonate and subsequent work‐up with aqueous NaCl gave the corresponding zinc complex 2 , in which the double bonds of the pyrrole ring isomerize to give rise to a conjugated chromophore. Its molecular structure displa…
Two valence states of tin atoms (namely, the doubly charged Sn 2+ and quadruply charged Sn 4+ states) in the structure of the (As 2 Se 3 ) 0.4 (SnSe) 0.3 (GeSe) 0.3 glasses are identified by 119 Sn Mössbauer spectroscopy. It is demonstrated that the concentration ratio of the doubly charged Sn 2+ and quadruply charged…
In this work we present the electrical and optical characterization of polymer light-emitting diodes (PLEDs) using indium-tin oxide (ITO), polyaniline (PAni), poly(p-phenylene vinylene) (PPV) +dodecylbenzenesulfonate (DBS) and aluminum (Al). To minimize the conversion temperature and reduce the structural defects of P…
pH titration shows that 1 : 1 : 1 mixed-ligand complexes are formed in the systems palladium(II)-Cyt-Glu-H 2 O (loggB = 19.73) and palladium(II)-Cyt-Lys-H 2 O (logβ = 16.20). Complexes Pd(C 5 H 5 N 5 )(C 5 H 8 NO 4 )Cl, Pd(C 5 H 5 N 5 )(C 6 H 13 N 2 O 2 )Cl, Pd(C 4 H 5 N 3 O)(C 6 H 13 N 2 O 2 )Cl, and Pd(C 4 H 5 N 3 O…
Single-wall carbon nanotubes (SWCNTs) were laterally grown on SiO2/Si substrates by means of an "all-laser" growth process. Our "all-laser" process stands out by its exclusive use of the same pulsed UV laser, first, to deposit the CoNi nanocatalyst and, second, to grow SWCNTs through the laser ablation of a pure graph…
B56 Introduction: Daucus carota, Apiaceae, commonly used in Lebanese folklore medicine for the treatment of leukemia. The anti-cancer aqueous extract of DC was examined by evaluating its effect on the induction of differentiation and inhibition of proliferation of the human promyelocytic leukemia HL-60 cells. Material…
The results of research presented at the 15th Pacific Basin Nuclear Conference (15PBNC) directly challenge the assumption, made for the purposes of radiation protection, that risks observed at acute doses of 500–1000 mGy can be extrapolated reliably down to zero dose and to low dose rates (the LNT model). The research…
BACKGROUND: In recent years scientists have been trying both to increase the efficiency of solar cells, whilst at the same time reducing dimensions and costs. Increases in efficiency have been brought about by implanting carbon nanotubes onto the surface of solar cells in order to reduce the reflection of sunrays, as…