Evidence for a molecular REC-effect in heavy ion collisions

Anisotropy spectra of the MOK X-ray transitions have been measured in F-Al, Al-Al and Cl-Al collisions as a function of the projectile energy. The measurements at higher energies indicate a new molecular effect due to transitions from quasicontinuum states to the MO 1s _σ-orbitals.     

Branching ratios between correlated and uncorrelated two electron transitions into the K-shell of Al,Ca, Fe and Ni ions

The branching ratios between the radiative single and double electron transitions into the doubly ionized K-shell were measured as a function of the atomic number. The results are compared with various theoretical predictions.     

M-like X-ray transitions in superheavy quasi-molecules

The anisotropy of the molecular orbital X-ray emitted in heavy-ion collisions was investigated for 18 systems with combined atomic numbers between 104 and 184. Well defined anisotropy peaks were observed which may reflect M-like transitions in the corresponding superheavy two-center molecules.     

Leveraging circuit theory and nonlinear dynamics for the efficiency improvement of energy harvesting

Nonlinear Dynamics - The Hopf–Hopf bifurcations of an aircraft nose landing gear model are investigated in this paper based on two pairs of continuation parameters. It is shown that due to...     

Analysis of influence of nonlinearities and noise correlation time in a single-DOF energy-harvesting system via power balance description

Nonlinear Dynamics - We discuss the role played by the time correlation properties of stochastic sources and by model nonlinearities in single-degree of freedom energy-harvesting systems. After...     

Synthesis and Evaluation of Chalcone-Quinoline Based Molecular Hybrids as Potential Anti-Malarial Agents

Molecular hybridization is a drug discovery strategy that involves the rational design of new chemical entities by the fusion (usually via a covalent linker) of two or more drugs, both active compounds and/or pharmacophoric units recognized and derived from known bioactive molecules. The expected outcome of this chemical modification is to produce a new hybrid compound with improved affinity and efficacy compared to the parent drugs. Additionally, this strategy can result in compounds presenting modified selectivity profiles, different and/or dual modes of action, reduced undesired side effects and ultimately lead to new therapies. In this study, molecular hybridization was used to generate new molecular hybrids which were tested against the chloroquine sensitive (NF54) strain of P. falciparum. To prepare the new molecular hybrids, the quinoline nucleus, one of the privileged scaffolds, was coupled with various chalcone derivatives via an appropriate linker to produce a total of twenty-two molecular hybrids in 11%–96% yield. The synthesized compounds displayed good antiplasmodial activity with IC₅₀ values ranging at 0.10–4.45 μM.     

Threshold behaviour of the MO x-ray anisotropy spectra observed in heavy ions collisions

The anisotropy of the MO-radiation between the characteristic L and K lines observed in Au-Au collisions has been measured as a function of the projectile energy between 8 and 60 MeV. The observed anisotropy peaks show a threshold behaviour. This behaviour results from transitions into well defined MO-minima formed at different internuclear distances.     

Azimuthal angle dependence of molecular orbital K X-rays in heavy ion collisions

The dependence of molecular X-ray emission on the azimuthal angle in heavy ion collisions has been measured as a function of the impact parameter in the collision systems F-Al and Cl-Cl at projectile energies of 20 and 48 MeV respectively. The values of the observed azimuthal anisotropies agree with dynamical calculations of molecular orbital X-ray emission, but they are at variance with predictions of the kinematic dipole model.