Methods MTT reduction assay was used to determine the cell growth and survival rates.

方法 用 MTT法检测细胞生长率及存活率。

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METHODS: MTT assay to test cytotoxicity; cell staining and NBT reduction to test cell differentiation.

方法：MTT法测定细胞增殖，细胞染色和NBT还原试验测定细胞分化。

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METHODS:Methods of in vitro cell culture model of human primary PDLC, tetrazolium bromide reduction (MTT) assay and direct contact were used.

方法：体外细胞培养，MTT （噻唑蓝）比色法，材料直接接触法。

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