introduction: the antinociceptive effect of morphine is, in part, mediated through the activation of a descending pathway. one of the major components of this pathway is the nucleus raphe magnus (nrm). our previous study demonstrated the involvement of nrm in the analgesic effect of morphine microinjected into the nucleus cuneiformis (ncf) in a descending manner. the aim of the current study wa...

a b s t r a c tintroduction: the nucleus cuneiformis (ncf) and ventrolateral periaqueductal gray (vlpag), two adjacent areas, mediate the central pain modulation and project to the nucleus raphe magnus (nrm). methods: this study examined whether the antinociceptive effect of morphine microinjected into the ncf is influenced by inactivation of vlpag and nrm in rats. animals were bilaterally micr...

Received Revised Nuclear pairing interaction plays a crucial role in both macroscopic-microscopic and fully macroscopic descriptions of nuclei. In the present study we discuss different pairing interactions (monopole and δ pairing forces) and the methods allowing for the particle number symmetry restoration in addition to the customary BCS treatment of pairing correlations in the context of α-d...

A brief review of accelerator mass spectrometry (AMS) is presented. The present work touches on a few technical aspects and recent developments of AMS, and describes two specific applications of AMS, the dating of human DNA with the C bomb peak and the search for superheavy elements in nature. Since two extended general reviews on technical developments in AMS [1] and applications of AMS [2] wi...

Using, for the first time, configuration-constrained potential-energy-surface calculations with the inclusion of β6 deformation, we find remarkable effects of the high order deformation on the high-K isomers in No, the focus of recent spectroscopy experiments on superheavy nuclei. For shapes with multipolarity six, the isomers are more tightly bound and, microscopically, have enhanced deformed ...

A detailed understanding of complete fusion cross sections in heavy-ion collisions requires a consideration of the effects of the deformation of the projectile and target. Our aim here is to show that deformation and orientation of the colliding nuclei have a very significant effect on the fusion-barrier height and on the compactness of the touching configuration. To facilitate discussions of f...

Numerical solutions of Einstein’s and scalar-field equations are found for a global defect in a higher-dimensional spacetime. The defect has a (3 + 1)dimensional core and a “hedgehog” scalar-field configuration in n = 3 extra dimensions. For sufficiently low symmetry-breaking scales η, the solutions are characterized by a flat worldsheet geometry and a constant solid deficit angle in the extra ...

We discuss the performance of two widely used nuclear mean-field models, the relativistic mean–field theory (RMF) and the non-relativistic Skyrme–Hartree–Fock approach (SHF), with particular emphasis on the description of superheavy elements (SHE). We provide a short introduction to the SHF and RMF, the relations between these two approaches and the relations to other nuclear structure models, ...