抗叶酸类抗疟药的抗药性机制已基本搞清，与其作用靶酶二氢叶酸还原酶或二氢蝶酸合成酶基因点突变相关。
The molecular mechanism of resistance to the antifolates has been well characterisied and is due to structural changes in the target enzymes resulting from the point mutations of DHFR or DHPS gene.
利用新型中频对靶磁控溅射在硅和M2高速钢基体上沉积了一系列无氢含铬类金刚石膜。
The hydrogen-free diamond-like carbon(DLC) films were deposited on substrates of Si and M2 high-speed steel using a new mid-frequency dual-magnetron sputtering.
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