Dongchun Zhang

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OBJECTIVE To observe the characteristics of serum protein in patients with benign paroxysmal positional vertigo (BPPV) during the symptomatic period. METHOD Fifty-five patients with BPPV and 58 control subjects were enrolled in the study. All the patients underwent the Dixe-Hallpike and Roll maneuver to confirm the type of BPPV. The average time of onset(More)
Rare earth elements are wide-used in China, but a few of studies were made on whether they had toxicity to soil fauna. In this paper, the filter paper contact method was used to study the influence of two rare earth elements on the dynamics of amino acids in earthworm body. The result showed that at low concentrations, the test rare earth elements increased(More)
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