A method is described by which it is possible to determine the high barrier to ring inversion and hindered rotation by neat racemization of optically active compounds when the racemization is caused by ring inversion or hindered rotation. The method is based preparation of sufficiently pure enantiomers, mainly by chromatography on swollen microcrystalline triacetylcellulose (TAC). By this t...

Atopic dermatitis (AD) is the most common chronic skin disease worldwide. It affects about 20% of children and 5% of adults. Patients with persistent or severe AD suffer from profound impairment of their quality of life. Additionally, AD places a heavy economic burden on patients and their family. AD is strongly associated with the development of food allergy, bronchial asthma, and allergic rhi...

a comprehensive study of schottky barrier mosfet (sbmosfet) scaling issue is performed to determine the role of wafer orientation and structural parameters on the performance of this device within non-equilibrium green's function formalism. quantum confinement increases the effective schottky barrier height (sbh). (100) orientation provides lower effective schottky barrier height in comparison ...

Spinel MgAl2O4 and family oxides are emerging barrier materials useful for magnetic tunnel junctions (MTJs). We report large magnetoresistance (TMR) ratios up to 429% at room temperature (RT) 1,034% 10 K in a Fe/MgAl2O4/Fe(001)-based MTJ prepared using electron-beam evaporation of Mg4Al-Ox. Resistance oscillations with thickness 0.3-nm were significantly enhanced compared those Fe/MgO/Fe(001) M...

Abstract Metal contacts to two-dimensional (2D) semiconductors are often plagued by the strong Fermi level pinning (FLP) effect which reduces tunability of Schottky barrier height (SBH) and degrades performance 2D semiconductor devices. Here, we show that MoSi 2 N 4 WSi monolayers—an emerging family with exceptional physical properties—exhibit strongly suppressed FLP wide-range tunable SBH. An ...

introduction: coronal leakage seems to play an important role in the failure of endodontic treatment. a double seal over root canal filling has been suggested as a means of improving the coronal seal. several restorative materials have been used in an attempt to produce a coronal barrier. the purpose of this study was to assess gray-coloured mineral trioxide aggregate (gmta), white-coloured min...

in this study, liquid-liquid extraction process in a kuhni extraction column was modeled and simulated. a non-equilibrium dynamic model was developed for modeling liquid-liquid extraction processes based on a rate-based model. the model equations are inclusive of partial and ordinary differential equations which were discretized in column height direction. the population balance model was used ...