Kline, Keenan, Elvehjem, and Hart (1) have described a syndrome produced in chicks by feeding a heated diet of natural foodstuffs. Elvehjem and Koehn (2) have described the preparation from liver of a concentrate which will prevent the syndrome. The concentrate was prepared from an aqueous extract of liver from which the flavins had been removed by adsorption on fullers’ earth and filtration. I...

Work in this laboratory on the adsorption behavior of vitamin A and related substances was initiated in 1929-30 when two of us (H. N. H., V. G. L.) attempted the concentration of this vitamin from the non-saponifiable portion of cod liver oil. Almost from the first we directed our efforts to adsorption methods of separating vitamin A in order to minimize oxidation or other undesired chemical re...

Much oil spill research has focused on fertilizing hydrocarbon oxidising bacteria, but a primary limitation is the rapid dilution of additives in open waters. A new technique is presented for bioremediation by adding nutrient amendments to the oil spill using thin filmed minerals comprised largely of Fullers Earth clay. Together with adsorbed N and P fertilizers, filming additives, and organocl...

Several investigators have described methods for the preparation of vitamin Bil concentrates practically devoid of vitamin Bz.~ However, very little has been reported on methods for procuring a rich source of vitamin B, free from vitamin B,. Salmon, Guerrant, and Hays (1) have described a preparation, made from velvet bean leaves, relying upon the specificity of fullers’ earth adsorption, solub...

Since the discovery of vitamin Bs, several biological assay procedures for this factor have been proposed (Gyorgy (1) ; Lunde and Kringstad (2); Wilson and Roy (3) ; Schneider et al. (4) ; Halliday and Evans (5) ; Edgar, El Sadr, and Macrae (6) ; Dimick and Schreffler (7); Reedman et al. (8)). These methods, with the exception of that of Edgar et al., are based upon the cure of acrodynia produc...