119 research outputs found

    The Effect of the Pairing Interaction on the Energies of Isobar Analog Resonances in 112124^{112-124}Sb and Isospin Admixture in 100124^{100-124}Sn Isotopes

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    In the present study, the effect of the pairing interaction and the isovector correlation between nucleons on the properties of the isobar analog resonances (IAR) in 112124^{112-124}Sb isotopes and the isospin admixture in 100124^{100-124}Sn isotopes is investigated within the framework of the quasiparticle random phase approximation (QRPA). The form of the interaction strength parameter is related to the shell model potential by restoring the isotopic invariance of the nuclear part of the total Hamiltonian. In this respect, the isospin admixtures in the 100124^{100-124}Sn isotopes are calculated, and the dependence of the differential cross section and the volume integral JFJ_{F} for the Sn(3^{3}He,t)Sb reactions at E(3^{3}He)=200=200 MeV occurring by the excitation of IAR on mass number A is examined. Our results show that the calculated value for the isospin mixing in the 100^{100}Sn isotope is in good agreement with Colo et al.'s estimates (45(4-5%), and the obtained values for the volume integral change within the error range of the value reported by Fujiwara et al. (53±\pm5 MeV fm3^{3}). Moreover, it is concluded that although the differential cross section of the isobar analog resonance for the (3^{3}He,t) reactions is not sensitive to pairing correlations between nucleons, a considerable effect on the isospin admixtures in NZN\approx Z isotopes can be seen with the presence of these correlations.Comment: 16 pages, 5 EPS figures and 2 tables, Late

    Cytoplasmic Prep1 Interacts with 4EHP Inhibiting Hoxb4 Translation

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    embryo development. Interestingly, Prep1 contains a putative binding motif for 4EHP, which may reflect a novel unknown function. development effect. mRNA to the 5′ cap structure. This is the first demonstration that a mammalian homeodomain transcription factor regulates translation, and that this function can be possibly essential for the development of female germ cells and involved in mammalian zygote development

    Methoxy polyethylene glycol epoetin beta and the treatment of anaemia in chronic heart failure

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    Aim. To study erythropoietic activity and safety of methoxy polyethylene glycol epoetin beta (MEB) and its effects on haemoglobin (Hb), erythropoietin, ferritin, NT-proBNP, cytokines, and chronic heart failure (CHF) symptoms and signs. Material and methods. In total, 84 patients with Functional Class (FC) II–IV (NYHA) CHF and anaemia were examined (mean age 59,7±1,6 years; 54 men and 30 women). Anaemia criteria were Hb levels <120 g/l in men and <110 g/l in women. CHF was due to coronary heart disease, CHD (post-infarction cardiosclerosis; n=40); to CHD in combination with Type 2 diabetes mellitus, DM-2 (n=10), and arterial hypertension, AH (n=14); and to the combination of CHD, AH, and DM-2 (n=10). Left ventricular ejection fraction (LVEF) in CHF patients with FC II, III, and IV wa

    Mixed-ligand complexes of copper (II) with ditiolfenols and heterocyclic diamines

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    By the methods spectrophotometric methods was investigated complex formation of copper with 2,6-ditiolphenol and its derivatives (2,6-ditiol-4-methylphenol, 2,6-ditiol-4-ethylphenol and 2,6-ditiol-4-tert-buthylphenol) in the presence of heterocyclic diamines. As heterocyclic diamines phenantroline (Fen), batophenantroline and dipyridile were used. It was established, that mixedligand complex were formed in weak acidic medium (pHop=6,0-8,5). Maximum of light absorption observed at (=522–550 nm. Molar coefficient of light absorption was ( = (3.08–4.92)?104. The stoichiometry of complexes had been discovered using shift the equilibrium and relative yield methods. During the extraction of copper(II) complexes with ditiol-phenols with the presence of heterocyclic diamines there was discovered that there is no chlorophorm molecules in the composition of the extracted complexes. IR spectra shows that hydroxyl group is involved to the formation of a bond with the metal and that phenantroline is included in the composition of the copper complex. In the organic phase mixed-ligand complexes have the monomeric form and can’t polymerize; that fact can be proved by calculations. By dint of spectrophotometric, IR-spectroscopic, thermogravimetric experiments and some published data we were able to determine the structural formula of complexes. Also had been determined main spectrophotometric characteristics of copper(II) mixed-ligand complexes: pH of the beginning of the deposition, optimal pH, detection limit and sensivity. For separation and finding copper, we studied the effect of interfering foreign ions: alkali, alkaline earth and rare earth elements, as well as acid anions selected masking reagents. On the base of the results was offered photometric method for determination of copper in steel different trade-marks and in food. This method characterized by good reproduction (relatively standard deviation no more 0.05) and low limit of discovery

    Shear cracks at edge of a flat punch

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    An extension of Rothe's method to non-cylindrical domains

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    summary:In this paper Rothe’s classical method is extended so that it can be used to solve some linear parabolic boundary value problems in non-cylindrical domains. The corresponding existence and uniqueness theorems are proved and some further results and generalizations are discussed and applied

    Evaluation of the crack resistance and crack sensitivity of refractories

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