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The plants were separated into roots, stems, and leaves, frozen in liquid nitrogen, and then fractured into small pieces with a blunt knife. The pieces were freeze-dried overnight at £­30 ¶È while under a vacuum (15£­25 torr) using a Labconco freezeedry system (Freezone 4.5, Labconco, Kansas City, MO, USA). Samples were mounted on aluminum stubs with double-sided carbon tape. The SEM  bservations were performed using a JEOL JSM-5400 LV scanning electron microscope in low vacuum mode using backscattered electron imaging.

[ Last edited by 1949stone on 2010-3-23 at 13:51 ]
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Originally posted by zhiwu7386 at 2010-03-23 08:20:13:
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The plants were separated into roots, stems, and leaves ...

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