Pestle

... air-dried under low intensity sunshine (25°C) for one week, and then oven dried at 40°C for 48 h. Dried leaves were crushed with a morter and a pestle and ground to a fine powder with a manual blender. The powdered samples were freezedried at -54°C for 48 h to ensure complete removal of water. ...

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using 0.25g of leave tissue grind in mortar and pestle with liqiud nitrogen. what is the meaning of bead mill is a mixer like coffee mixer?

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... with no lost of yield / quality, again depends on the plant and the extraction procedure. How do you grind your material? Liquid nitrogen / motar pestle ? Bead mill? ?

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