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Vladimir Dusevich

https://www.google.com/webhp?sourceid=chrome-instant&rlz=1C1OPRB_enUS553US553&ion=1&espv=2&ie=UTF-8#q=microvesicles+tem&*

OK, a while ago I have worked with microvesicles.

If you want to embed them, treat them as cell suspension.

If you want negative staining, then treat them (after fixation) as nanoparticles.