Two Electrons in a Quantum Dot: A Unified Approach

Low-lying energy levels of two interacting electrons confined in a two-dimensional parabolic quantum dot in the presence of an external magnetic field have been revised within the frame of a novel model. The present formalism, which gives closed algebraic solutions for the specific values of magnetic field and spatial confinement length, enables us to see explicitly individual effects of the electron correlation.Comment: 14 page

Characterization of chiral metamaterial sensor with high sensitivity

In this study, a chiral metamaterial sensor applications are created by placing asymmetrically two meander line front and back side of the substrate layer. Characterization of the dielectric constant, thickness and loss tangent have been performed both in simulation and experimental methods. Different Arlon type materials used for showing the effects of dielectric constant on transmission coefficient. Obtained bandwidths for characterization are greater than the similar studies which verifyies increased sensitivity. This study also differs from similar studies by presenting permeability and loss tangent effects on transmission coefficient as well as having wider bandwidth that increase sensitivity due to its special chiral design. Set of experimental study performed to verify simulated ones for change in thickness, dielectric constant and loss tangent and compatible results with simulated ones obtained. According to simulation and experimental study results, proposed structurecan be used myriad microwave sensing applications effectively due to high sensitivity property. © 2019 Elsevier GmbHTürkiye Bilimsel ve Teknolojik Araştirma Kurumu: 117M855We would like to thank the Scientific and Technological Research Council of Turkey ( 117M855 ) for the financial support

Antioxidant/prooxidant effects of α-tocopherol, quercetin and isorhamnetin on linoleic acid peroxidation induced by Cu(II) and H 2

The peroxidation of linoleic acid (LA) in the presence of copper(II) (Cu(II)) ions alone and with alpha-tocopherol (alpha-TocH) was investigated in aerated and incubated emulsions at 37 degrees C and pH 7. Additionally, the effects of quercetin (QR) and its O-methylated derivative, isorhamnetin (IR), as potential antioxidant protectors were studied in the (Cu(II) + TocH)-induced LA peroxidation system. Cu(II)-induced LA peroxidation followed pseudo-first-order kinetics with respect to primary (hydroperoxides) and secondary (aldehydes- and ketones-like) oxidation products, which were determined by ferric thiocyanate and thiobarbituric acid-reactive substances methods, respectively. As opposed to the concentration-dependent (at 0.6 and 10.0 mu M) prooxidative action of alpha-TocH in the absence of QR and IR, the latter two compounds showed antioxidant effect over TocH. The peroxidation of LA in the presence of Cu(II)-H2O2 combination alone and with TocH, QR and IR were also investigated in aerated and incubated emulsions, where the latter three compounds exhibited antioxidant effects