The inhibin plasmid DNA was extracted and purified by alkaline lysis method and DEAE-fiber column chromatography and its concn.
采用碱裂解法与DEAE -纤维柱层析法提取与纯化抑制素质粒dna，用分光光度法测定其浓度和纯度。
2
Effects of acidity, concn. of potassium iodide and dosage of reducing agent on determination are investigated. It is simple and rapid with relative standard deviation 1.08%.
研究了酸度、碘化钾浓度、还原剂用量对测定影响。测定的相对标准偏差为1.08%，方法简单、快速。
3
The change of ammonia nitrogen concn . in the waterbody had no significant difference from that of the control group.