实验还大量制备了这两种质粒或载体dna，并用聚乙二醇沉淀法进行了纯化。
These plasmids or vectors DNA were also prepared on a large scale and purified by precipitation with polyethylene glycol (PEG).
实验结果证实，它们都可以作为催化剂的载体，沉淀法承载金属催化剂，直接裂解乙炔，催化合成多壁碳纳米管。
Experimental results proved that both of them could support metallic catalyst by precipitation, and directly decompose acetylene to prepare multi walled CNTs.
以HPV-18 DNA 为供体、小牛胸脉DNA 为载体，NIH 3T3细胞为受体细胞，应用磷酸钙沉淀法将供体DNA 引入细胞内，得到了清晰的NIH 3T3细胞形态学转化灶。
NIH 3T3 cells were transfected by human papillomavirus 18(HPV 18). HPV 18 DNA as donor and calf thymus DNA as vector. Calcium phosphate technique was used.
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