Abstract

Abstract To analyze the proteins present in rubber-free serum obtained by coagulating latex for the preparation of sheet rubber, the method described by Brazier was adopted. Inasmuch as this method is not wholly satisfactory, particularly in the humid atmosphere of the tropics, is was improved in several ways. Besides several amino acids, some interesting byproducts were isolated, among others a yellow-reddish thick oil, and other ether-soluble substances. Scheme G outlines the results attained. The properties of the products isolated will be discussed in a later publication.

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