A study was made of the effect of using silica gel and macroporous resin I as absorbent in column chromatography on the separation of tigogenin.
研究用硅胶、大孔树脂Ⅰ作为吸附剂
柱色谱
分离效果。
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For one thing, disability activists have pointed out that some people need flexible plastic straws, plus paper straws are making a comeback and other alternatives are popping up all over it, from collapsible straws, to silicone, to glass.
一方
,
活动人士指出,有些人需要柔性塑料吸管,另外纸吸管正在卷土重来,其他替代品也在涌现,从可折叠吸管到硅胶,再到玻璃。