development
在纸色谱法和薄层色谱法中,将一端点了样的纸或薄层板放入装有溶剂的展开槽中,由于毛细管作用,溶剂不断前进,同时带动试样中各组分以不同速度向前移动,从而使组分得到分离。此过程称为展开或层析。所用的溶剂称为展开剂。展开有多种方式,如上行展开、下行展开、多次展开、连续展开、径向展开、环形展开等。
v.: unwind, evolve, unwound, extend the surface area, width or length of sth by unfolding or unrolling it, unfold, carry out, be in full swing, launch, develop, deploy, unfurl, uncoil, outspread