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NO determination of SHEEC1 treated with different concentra-tion of As2O3. NO increased markedly in 5 μmol·L-1 of As2O3 group (A), intermediately in 3 μmol·L-1 of As2O3 group (B) and lowly in 1 μmol·L-1 of As2O3 group (C). The control group, 0 μmol·L-1 of As2O3, were remained on the basal lines (D).
