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One novel ytterbium complex [Yb(HEgta)] · 4HO ( I), where HEgta = ethylene glycol-bis(2-aminoethylether)-N,N,N′,N′-tetraacetic acid, has successfully been synthesized by the reaction of YbO with HEgta in an aqueous solution after refluxing for 18 h. The crystal and molecular structures were determined by the infrared spectrum and X-ray crystallography. The crystal structural analysis reveals that central Yb(III) in I is eight-coordinated in a geometry of pseudo-square antiprismatic polyhedron by two amine N atoms, two ethylene glycol O atoms, and four carboxyl O atoms from one HEgta ligand and crystallizes in the orthorhombic crystal system with P222 space group. The crystal data are as follows: a = 9.4927(8), b = 12.2627(13), c = 18.3657(17) Å, V=2137.9(4) Å, Z = 4, ρ = 1.934 mg/m, μ = 4.448 mm, F(000) = 1236, R = 0.0291, and wR = 0.0714 for 8850 observed reflections with I ≥ 2σ( I). In addition, there is a protonated coordinated carboxyl O atom (O(5)) in the [Yb(HEgta)] moiety. [ABSTRACT FROM AUTHOR]

In order to investigate the possible influence of metallic environment on the alpha decay process, we have measured the Sm activities in the hosts of metal samarium and SmO . The Sm half-life was found to be (1.06±0.01)×10 y in metal samarium and (1.07±0.01)×10 y in SmO , respectively. No significant change has been observed within the experimental uncertainty. The absolute half-life presented here is consistent with the recommended value. [ABSTRACT FROM AUTHOR]

The angular distribution of the 2H ( 6He,7Li n reaction was measured with a secondary 6He beam of 36.4MeV for the first time. The proton spectroscopic factor of 7Li ground state was extracted to be 0.42±0.06 by normalizing the calculational differential cross-sections with the distorted-wave Born approximation to the experimental data. It was discussed that the uncertainty of extracted spectroscopic factors from the one-nucleon transfer reactions induced by deuteron might be reduced by determining the volume integrals of imaginary optical potentials precisely. [ABSTRACT FROM AUTHOR]

A model on heat and mass transfer in unsaturated porous media with solid/liquid phase change was developed with extending the three-variable model previously proposed. The movement of air phase and its effect on the motion of water is considered. The model has been checked with comparison of the experimental results of the temperature distribution for two dimensional freezing process. The evolution of air pressure, water and ice saturation were predicted by solving the governing equations. The ice segregation and moisture movement toward the front of freezing were numerically simulated. [ABSTRACT FROM AUTHOR]

The article examines the effects of antioxidants on UV-induced DNA breakage in human peripheral lymphocytes. The study provides an evidence that reactive oxygen specie plays an important role in mediating UV-induced DNA damage. It explains how antioxidants in the diet protect skin from UV-induced skin damage and reduce the tumor response to UV radiation. Heparinized human peripheral blood specimens were used for testing UV-dose dependence of DNA breakage and for testing the effect of antioxidants on UV-induced DNA breakage