concerning this article should be addressed to Ernest I. Becker at the Poly technic Institute of Brooklyn.4 Allophane: Greek allophanes, "appearing otherwise," from alios (otherwise) + phainesthai (to appear). 5 The term has also been used to describe a class of inorganic aluminum silicates. These are not under consideration here. Although «-and 7-substituted allophanates are also known, the discussion has been limited to esters of the unsubstituted acid:
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