Abstract
Summary
(1) The Macht-Pels phytotoxic test for pemphigus was applied to sera of rabbits and human beings treated with sulfanilamide and 6 derivatives. (2) None of these sera exhibited a greater toxicity than normal blood for seedlings of Lupinus albus. (3) The phytopharmacological test thus affords a convenient means of differentiating between true pemphigus and the pemphigoid eruptions produced by sulfa drugs. (4) Hydroponic experiments on Lupinus albus seedlings placed in solutions of seven sulfa derivatives revealed a diphasic effect on growth of the roots. Low concentrations stimulated while higher concentrations inhibited root growth.
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