These substances plus Folic acid, Vitamin B-12 and SAMe are all methyl donors.

这些物质加上叶酸，维生素b - 12和蛋氨酸都是甲基供体。

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Manganese ore (PGM) and powder active carbon (PAC) are used in static experiment to decolorize dyestuffs Rhodamine B and methyl orange wastewater.

利用除铁用锰矿砂（PGM）为处理剂进行罗丹明B与甲基橙模拟废水的静态脱色试验，并与粉末活性炭（PAC）进行对比。

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