Limonene needed in recycling foamed polystyrene was extracted from the ear of schizonepeta tenuifolia using ligroin.
本文研究从荆芥穗中提取所需的柠檬,其方法是溶剂萃取。
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You can also look for special recycling drop-off locations for odd items like batteries or styrofoam.
你也可以为电池或泡沫聚苯等奇怪物品寻找特殊回收地点。
What throws a spanner in the works is the layer of polyethylene that makes the cup waterproof, and the lid, which is most often made of polystyrene.
在工作中投入扳手是使水聚, 以及通常由聚苯制成盖。
By contrast, early laboratory experiments used sterile spherical beads of just one type of plastic, polystyrene, which were bigger than the nano-size range.
相比之下,早期实验室实验仅使用一种塑料——聚苯无菌球形珠,其尺寸大于纳米尺寸范围。
For example, polystyrene turns into small pieces with time.
例如, 聚苯随着时间推移会变成小块。
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