Zhousheng Shang

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The concentrations of Cu, Fe, Mn, Ni, Zn, Cr, Pb, and Cd in 28 samples collected from bottom sediments in the Gansu section of Yellow River, China, were investigated in order to evaluate their distribution and pollution level. The measured metals in the sediments were found to be in the range of Cu 15.52∼57.50 mg/kg, Fe 19593.24∼69963.42 mg/kg, Mn(More)
We report photometric and spectroscopic observations of the SU UMa-type dwarf novae, KS Ursae Majoris, during its 2003 February superoutburst. Modulations with a period of 0.07017 ± 0.00021 day, which is 3.3% larger than the orbital period, have been found during the superoutburst and may be positive superhumps. A maximum trough-to-peak amplitude of around(More)
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