Materials Literature
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Abstract An InGaN/GaN blue‐violet light‐emitting diode (LED) structure and an InGaN/GaN blue LED structure were grown sequentially on the same sapphire substrate by metal‐organic chemical vapor deposition (MOCVD). At the low injection current, the intensity ratio of blue‐violet light to blue light was almost constant,…
Oleg G. Sinyashina, Yury P. Khodyreva, Elvira S. Batyevaa, Еlena K. Badeevaa, Elena V. Platovaa & Lidiya I. Kurshevaa a A. E. Arbuzov Institute of Organic & Physical Chemistry of RAS , Kazan , Russia Abstract New ammonium salts of O,O′-dialkyldithiophosphoric acids have been obtained based by the reaction of white pho…
In preparation for designing a strategy of integrated management associated with post-harvest products in Senegal, the bioactivity of crude and extracts of Calotropis procera Ait. on the survival of eggs and adultsCaryedon serratus (Ol.) pest of groundnut, Arachis hypogaea L., was studied under controlled conditions.…
Very short helix pitch (p 0 ~150-200nm) ferroelectric liquid crystals (FLCs) have been developed. Electro-optical cells based on these mixtures are free from selective reflection and diffraction in the visible spectral range and therefore exhibit very perfect operation in deformed helix ferroelectric (DHF) mode. Two m…
In order to understand effect of polycyclic aromatic hydrocarbon (PAH) on shell repair of the Pacific oyster, Crassostrea gigas, shell regeneration experiments were carried out using oysters drilled a hole on the right valve. The change of pH and hemocytic characteristics in both extrapallial fluid and hemolymph were…
A new approach to the synthesis of 2-hydroxyaryl-alkenylphosphine oxides and dialkyl (diaryl)-(2-methyl-4-oxopent-2-yl)phosphine oxides was developed that involves an interaction of Grignard reagents with available benzo[e]-1,2-oxaphosphorinines and 1,2-oxaphospholene-2-oxide. This approach allows obtaining target com…
We have investigated the effect of fluorine dopant concentration (0–15 F / Sn wt.%) on structural, optical and electrical properties of SnO 2 thin films grown by spray pyrolysis technique. According to the experimental evidences and data analysis, we found in these samples: (1) the polycrystalline layers, while in und…
The effects of Co2+, Ti4+, and Bi3+ substitution on the microstructures and properties of low-temperature fired M-type barium hexaferrites have been studied in order to adapt the development of low-temperature cofired ferrites technology and produce gyromagnetic devices with a multilayer process. It is found that Bi3+…
Quantum corrections to the electron-hole motion in graphene are investigated by \napplying the multiband Wigner approach. A diagonalization procedure regarding the \npseudo-spin degree of freedom is proposed. The resulting formulation of the equation of \nmotion reveals to be particularly close to the classical descri…
Pipelines tubes are part of vital mechanical systems largely used in petrochemical industries. They serve to transport natural gases or liquids. They are cylindrical tubes and are submitted to the risks of corrosion due to high PH concentrations of the transported liquids in addition to fatigue cracks due to the alter…
Sorption capacity of single-walled carbon nanotubes, detonated nanodiamonds and graphene to humic substances was studied by radiotracer method. Tritium labeled brown coal humic acids and fulvic acids separated from Suwannee River were used as sorbates. Adsorption isotherms were described by Langmuir equation. It was f…
In this work, alkali-activated fly ash was used as a binder instead of Portland cement at the preparation of concrete. Sodium hydroxide and water glass were used as alkali activators. Fractions of natural aggregate of 0-4 mm, 4-8 mm and 8-16 mm were replaced by air-cooled granulated steel slag fraction of 4-8 mm and 8…
Abstract An investigation of TiS2 electronic structure was conducted using a first‐principles calculation based on density functional theory (DFT). The results showed that there is indirect S3p ‐Ti3d band overlaps in ground electronic structure of TiS2. The measurements of resistivity and Hall effect were used to char…
An approach for calculating spin transfer torque including interfacial scattering effects in structures consisting of multiple ferromagnet/nonmagnet (FM/NM) bilayers was developed. Using this approach, a micromagnetic analysis on structures consisting of six magnetic layers was compared to electrical measurements on e…
Abstract Low temperature micro‐photoluminescence (μ‐PL) has been applied to study GaInNAs bulklike layers grown on GaAs substrates with various crystallographic orientations [(100), (111)A, (311)A, (411)A, and (511)A]. At low excitation conditions, the μ‐PL spectra show sharp PL lines of ∼100‐300 μeV widths. The densi…
The thermal stability of first-row transition-metal-doped TM@Zn i S i nanoclusters, in which TM stands for the first-row transition metals from Sc to Zn and i = 12, 16, has been analyzed for the two lowest-lying spin states of each metal. These structures were previously characterized by Matxain et al. ( Chem.—Eur. J.…
Water plays a critical role in protein dynamics and functions. However, the most basic property of hydration--the water sorption isotherm--remains inadequately understood. Surface adsorption is the commonly adopted picture of hydration. Since it does not account for changes in the conformational entropy of proteins, i…
Abstract Using a first‐principles quantum mechanical method, we calculated the (001) and (110) interfacial energies between the low temperature α and α′ phases of Fe–Cr alloys as functions of chemical composition. We show that the interfacial energies and the interfacial energy anisotropy are highly composition depend…
Abstract Hybrid particles of polyurethane (PU) containing a number of small poly(methyl methacrylate) (PMMA) nanoparticles inside were prepared using glycidyl methacrylate (GMA) monomer as a linker between PU and PMMA; the resulting polymers were poly (urethane‐glycidyl methacrylate‐methyl methacrylate) (PUGM). It was…
Advanced drug delivery nanosystems (aDDnSs) combining liposomal and dendritic materials have only recently appeared in the research field of drug delivery. The nature and localization of the interactions between the components of such systems are not yet fully described. In this study, liposomes are combined with hype…