Abstract: An aqueous, biologically-compatible, reversible, oxygen-carrying system comprising a novel metallated porphine-carbohydrate-fatty acid complex, particularly a novel tetra-(p-carboxyphenyl)porphine-iron(II)-dextran-octanoate complex, useful as a synthetic respiratory pigment, and a method for preparing same. The complexes may be dissolved in a suitable electrolyte and used as a substitute for red blood cells.

Abstract: A method for testing biological materials, and especially those obtained from the human body, for the presence of the hepatitis associated antigen (HAA), in which Zeise's salt, or another water soluble platinum or palladium salt containing a trans directing group which enables the noble metal-containing moiety of the salt to react with the hepatitis associated antigen (HAA) or related materials, is mixed with the material to be tested in the presence of water, causing the formation of characteristic visible turbidity in the mixture which persists after agitation if HAA is present. Any slight turbidity observed initially in normal sera disappears upon agitation if the test sample is free from the hepatitis associated antigen. Also disclosed are test reagents consisting of the platinum and palladium salts in aqueous solutions containing non-interfering stabilizing salts such as sodium and potassium chloride and equivalents.