Combined CI+MBPT calculations of energy levels and transition amplitudes in Be, Mg, Ca, and Sr

Configuration interaction (CI) calculations in atoms with two valence electrons, carried out in the V(N-2) Hartree-Fock potential of the core, are corrected for core-valence interactions using many-body perturbation theory (MBPT). Two variants of the mixed CI+MBPT theory are described and applied to obtain energy levels and transition amplitudes for Be, Mg, Ca, and Sr

Nuclear reactions induced by protons on vanadium.

Our present knowledge of nuclear structure attempts to explain nuclear properties on the basis of nucleons resonating as protons and neutrons with very strong, short-range forces acting between them. The nature of the forces between these elementary particles are not known, and elucidation of this is occupying the attention of a great many nuclear scientists. Many approaches, theoretical and experimental, have been developed for the understanding of nuclear structure over the past several years. The theoretical approaches have led to the development of models describing nuclear phenomena

ABA signalling, grafting, irrigation scheduling, partial rootzone drying, tomato, water use.

The role of bacterial 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity in the interaction between tomato (Lycopersicon esculentum=Solanum lycopersicum) and Pseudomonas brassicacearum was studied in different strains. The phytopathogenic strain 520-1 possesses ACC deaminase activity, an important trait of plant growth-promoting rhizobacteria (PGPR) that stimulates root growth. The ACC-utilizing PGPR strain Am3 increased in vitro root elongation and root biomass of soil-grown tomato cv. Ailsa Craig at low bacterial concentrations (106 cells ml–1 in vitro and 106 cells g–1 soil) but had negative effects on in vitro root elongation at higher bacterial concentrations. A mutant strain of Am3 (designated T8-1) that was engineered to be ACC deaminase deficient failed to promote tomato root growth in vitro and in soil. Although strains T8-1 and 520-1 inhibited root growth in vitro at higher bacterial concentrations (>106 cells ml–1), they did not cause disease symptoms in vitro after seed inoculation, or in soil supplemented with bacteria. All the P. brassicacearum strains studied caused pith necrosis when stems or fruits were inoculated with a bacterial suspension, as did the causal organism of this disease (P. corrugata 176), but the non-pathogenic strain Pseudomonas sp. Dp2 did not. Strains Am3 and T8-1 were marked with antibiotic resistance and fluorescence to show that bacteria introduced to the nutrient solution or on seeds in vitro, or in soil were capable of colonizing the root surface, but were not detected inside root tissues. Both strains showed similar colonization ability either on root surfaces or in wounded stems. The results suggest that bacterial ACC deaminase of P. brassicacearum Am3 can promote growth in tomato by masking the phytopathogenic properties of this bacterium

Greece, socialism, communism, and the left, 1974-2008

Greek history after the 1967-1974 dictatorship is characterized by a transition from a post‐civil war police state to democratic stability, known as "metapolitefsi". This process was to a large extent a reaction to the forceful socialist and communist movement, leading to a deeper integration of the traditional left in the “national backbone” of political life. At the same time, grassroots movements and a dynamic extra‐parliamentary left contested this political mutation and reinforced antagonistic struggles, on some occasions with spectacular results