ALUMINIUM plates with large crystals, obtained by recrystallization of fine-grain material, show many crystals with a particular type of grain boundary: they appear as 'pointed' inclusions at the edge ...
A string of biforine-like cells associated with the anther of Dieffenbachia seguine (Jacq.) Schott. (Araceae). These cells contain bundles of thin pointed crystals of calcium oxalate, which they may ...
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