
好词典

源自拉丁语 'supernatantem'(现在分词),由 'super-'(在上)和 'natare'(漂浮)组成,字面意思为'浮在上面的'。
❶ 指液体静置或离心后浮在上层的清澈部分,通常含有溶解的物质或悬浮的细小颗粒。
“After centrifugation, the supernatant was carefully pipetted off.”
(离心后,小心地用移液管吸出上清液。)
“The clear supernatant above the sediment contained the desired protein.”
(沉淀物上方的清澈上清液含有目标蛋白质。)
❶ 形容浮在液体表面或上层的物质或液体部分。
“The supernatant liquid was clear and free of particles.”
(上清液体清澈无颗粒。)
“Only the supernatant layer was collected for the experiment.”
(仅收集了上清层用于实验。)
supernatant fluid — 指在沉淀或离心后位于上层的液体部分,常用于实验室或工业流程中。
“The supernatant fluid was analyzed for its chemical composition.”
(对上清液进行了化学成分分析。)