Prolonged survival of skin allografts in rats treated with heterologous anti-skin serum

The preparation of donkey anti-rat skin γ-globulin is described. This preparation injected subcutaneously into rats caused a marked prolongation of skin allograft survival times.

Absorption experiments of the donkey anti-rat skin γ-globulin with rat liver, leucocytes, erythrocytes, serum and skin preparation as well as the lymphocytotoxic activity of the anti-epidermis serum are described. No correlation between the biological activity of the serum and its lymphocytotoxic activity could be found.

Various possibilities explaining the mode of action of the donkey anti-rat skin serum in prolonging allograft survival times are discussed.

One-step quantitative extraction of medium-chain and long-chain fatty acids from aqueous samples

Medium-chain (C(6) and longer) fatty acids, as well as 12-hydroxystearic and long-chain fatty acids, can be quantitatively extracted into toluene and titrated in the toluene phase with tetrabutylammonium hydroxide. The method may be useful in determinations of fecal and serum fatty acids and of the products of lipolysis.