ODESSA

About: ODESSA is a based out in . It is known for research contribution in the topics: Population & Stars. The organization has 8058 authors who have published 8092 publications receiving 63228 citations.

Advanced Relativistic Energy Approach to Radiative Decay Processes in Multielectron Atoms and Multicharged Ions

Abstract: We present the generalized advanced energy approach to relativistic calculations of the radiative decay (transition) probabilities in neutral multielectron atomic systems and multicharged ions. The approach is based on the Gell-Mann and Low S-matrix formalism and relativistic many-body perturbation theory (PT), using an optimized one-quasiparticle representation and an accurate account of relativistic and correlation effects. In the relativistic case, the Gell-Mann and Low formula expresses an energy shift \( \Delta E \) through the electrodynamical scattering matrix including an interaction with a laser field as a photon vacuum field. The last case is corresponding to traditional definition of the radiative transition probabilities for atoms and ions. The results of relativistic calculation of the radiative transition probabilities and oscillator strengths are presented for a number of heavy atoms and multicharged ions and compared with available theoretical and experimental data. The role of the correlation corrections and gauge non-invariant contributions to the radiation widths for different atoms and ions is discussed.

Anti-Parkinson botanical Mucuna pruriens prevents levodopa induced plasmid and genomic DNA damage.

Abstract: Levodopa is considered the 'gold standard' for the treatment of Parkinson's disease. However, a serious concern is dyskinesia and motor fluctuation that occurs after several years of use. In vitro experiments have shown that in the presence of divalent copper ions, levodopa may induce intense DNA damage. Mucuna pruriens cotyledon powder (MPCP) has shown anti-parkinson and neuroprotective effects in animal models of Parkinson's disease that is superior to synthetic levodopa. In the present study two different doses of MPCP protected both plasmid DNA and genomic DNA against levodopa and divalent copper-induced DNA strand scission and damage. It exhibited chelation of divalent copper ions in a dose-dependent manner. The copper chelating property may be one of the mechanisms by which MPCP exerts its protective effects on DNA.

The eclipsing binary star RZ Cas: Accretion-driven variability of the multimode oscillation spectrum

Abstract: DEM acknowledges his work as part of the research activity supported by the National Astronomical Research Institute of Thailand (NARIT), Ministry of Science and Technology of Thailand. HL acknowledges support by the DFGgrant LE 1102/3-1. ER and MGLJ acknowledge support MINECO/Spain projects AYA2014-54348-C3-1-R, ESP2014-54362-P and ESP2015-65712-C5-5-R. VT acknowledges support from RFBR grant no. 15-52-12371. SJ acknowledge the grant received from Indo-South Africa Science and Technology Cooperation INT/SAFR/P-3(3)2009) and NRF grant UID69828 funded by Departments of Science and Technology of the Indian and South African Governments under which the photometric observations were carried out from ARIES. KA, RK acknowledge their work as a research activity in the framework of Project No. 0075/GF4 'Investigation of the Variability of Stars and the Processes of Substance Exchange With a Gas-Dust Disk' DEM thanks E. Soydugan for providing her 2002 observations of RZ Cas for re-analysis. MDE thanks amateur astronomer Kari Tikkanen (Oulu University) for providing us, when we were searching for evidences of orbital period jump, his visual observations, which safely showed the orbital period jump in RZ Cas in the years 2000-2001.

Pulsating Components of Eclipsing Binaries: New Asteroseismic Methods of Studies and Prospects

Abstract: We give a brief review on the present status of our research of A-F pulsating components of semi-detached Algol-type systems. We suggest a new asteroseismic approach for estimating the evolutionary stage of the mass-accreting components of Algols during rapid and slow mass-transfer phases, asynchronization and differential rotation.