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The effect of the QELBY colloid on the viability of MCF-7 breast cancer cells. The QELBY colloid was prepared by mixing with 1% of QELBY power and DMEM and centrifuged at 3,000 rpm. A different amount of the supernatant was used for the preparation of DMEM media. Data are mean ± SD (n = 4). Means with different superscript are significantly different at p < 0.05.
