Materials Literature
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The kinetics of 5-aminotetrazole thermal decomposition in the condensed phase at high heating rates (∼100 K/s) was studied by the dynamic mass spectrometric thermal analysis using a molecular beam sampling system, and the product composition was determined. Two routes of 5-aminotetrazole decomposition were distinguish…
The optical properties of hexagonal boron nitride (h-BN) thin films were studied in this paper. The films were characterized by Fourier transform infrared spectroscopy, UV—visible transmittance and reflection spectra. h-BN thin films with a wide optical band gap E g (5.86 eV for the as-deposited film and 5.97 eV for t…
The first co-crystals of meloxicam with succinic and maleic acids were obtained by solvent-drop grinding techniques.
Combination of battery and ultracapacitor as energy storage of hybrid electric vehicles is considered a good way to improve overall vehicle efficiency and battery life. Coordinated power distribution and bi-directional DCDC converter control are challenges. Method to determine distribution of ultracapacitor and batter…
Characteristics and detailed morphology of the genus Characterization and detailed morphology of the genus Phormidesmis TURICCHIA et al. 2009 are presented. This genus is more related to thin cyanobacteria of the family Pseudanabaenaceae than to the genus Phormidium sensu stricto, which is confirmed by ultrastructural…
In this paper magnetic properties and global operating parameters of nanocrystalline and ferrite materials are compared. It is figured out that because of their marvelous magnetic properties the nanocrystalline materials are the future magnetic materials in power electronics. The losses of three toroidal nanocrystalli…
In this paper, two types of super-compact couplers, a branch line coupler and a rat-race coupler, are newly designed by replacing their −90° or −270° right-handed transmission lines (TLs) with +90° or +270° multi-layered (ML) composite right/left-handed (CRLH) TLs. Since the recent ML CRLH TLs have a broadband left-ha…
This paper reports on five species of the genus Gomphonema, which seem to be widespread at least in Siberia or in other regions, too. Due to their wide distribution their knowledge is of special importance. Three species are described as new (G. demersum, G. jergackianum and G. marvanii) based on light- (LM) and scann…
Abstract We have developed a facile method to prepare polyacrylonitrile/montmorillonite (PAN/MMT) nanocomposites using the surface‐initiated redox polymerization of acrylonitrile (AN) in the aqueous phase. The MMT silicate surfaces were first treated with diethanolamine, and the modified MMT (DEA‐MMT) was subsequently…
Ternary piezoelectric crystals Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3(PIN-PMN-PT) have improved thermal and electrical stability than binary PMN-PT. To better understand crystal system and optimize crystal properties, we systematically investigated crystal growth for compositions between the two binary end-members,…
Owing to its outstanding resistance to general and localised corrosion, titanium has become established as the preferred material for sea water cooled heat exchanger tubing, be it for power plant surface condensers or heat exchangers in thermal desalination plant or in the chemical and petrochemical processing industr…
Insertion of flexible, 4-aminobutyroyl spacers in between the cholate repeat units had been found previously to enhance the folding of cholate oligomers in homogeneous solution (Zhao, Y. J. Org. Chem. 2009, 74, 834-843). The opposite effect was observed when the oligomers were solubilized in aqueous solutions of sodiu…
Microalgae using a submersible fluorescence probe in water column (up to 100 m) were measured during the austral summer of 2006 (February) in Prydz Bay, East Antarctica (triangular-shaped embayment in the Indian sector of Southern Ocean). Concurrently, environmental parameters such as temperature, salinity and nitroge…
The suitability of oxalic acid as a crosslinker of polyvinyl alcohol (PVA) is the focus of study of the present paper. Oxalic acid concentration was varied from 3–70% (w/w with respect to polymer) and curing was carried out at various temperatures (100–140 °C) for a range of time periods (20–120 minutes). The optimum…
A series of relaxor piezoelectric single crystals, including lead magnesium niobate-lead titanate (PMN-PT) and pure and manganese-doped lead indium niobate-lead magnesium niobate-lead titanate (PIN-PMN-PT and Mn: PIN-PMN-PT), have been developed by a modified Bridgman crystal growth process. These single crystals have…
Good quality gallium oxide/gallium sulfide nanoplates having an ultrathin thickness, via reaction of gallium oxide nanoribbons with sulfur solution, were prepared. The cutting of the ultrathin nanoribbons into plates originated from the lattice mismatch between the gallium oxide and gallium sulfide, which was quite de…
In this paper, optical properties of Y 2 O 3 :Eu 3+ micro- and nanophosphors synthesized by sol-gel process are reported. Citric acid and tartaric acid were employed as chelating agents. Different factors effecting structures and properties of the phosphors, such as concentration of Eu 3+ , sintered temperature and th…
Structural and luminescent properties of Er-doped ZnO (ZnO:Er) grown by metalorganic chemical vapor deposition were investigated. In comparison to the undoped ZnO, the c-axis crystallographic orientation was deteriorated and the photoluminescence (PL) intensity of the band-edge became lower in the ZnO:Er. The weak ban…
Polychelates of Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), and VO(IV) with a new bis-chelating Schiff base derived from 5-acetyl-2,4-dihydroxyacetophenone and isonicotinic acidhydrazide have been synthesized. The resulting polychelates have been characterized by elemental analyses, IR and electronic spect…
Gallium-doped zinc oxide (GZO) transparent conductive thin films were deposited on glass substrate by RF magnetron sputtering using a ceramic ZnO target with 10 wt. % Ga 2 O 3 doped. The effects of substrate temperature on structural, electrical and optical properties of the films were investigated. X-ray diffraction…