To eliminate the collection of serial samples of arterial blood an instrument has been developed which records dye-dilution curves by measuring changes in optical density of a segment of a heatflushed ear. Comparison with curves from arterial samples shows close similarity in the shape of the curves, and good agreement between the cardiac outputs calculated from them. Other advantages of the te...

We introduce a close packing model of the particles from the disperse phase of a liquid dispersion. With this model, we find the sediment volumes, the emergent, and the bound dispersion medium. We formulate a new approach for determining the equivalent radii of the particles from the sediment and the emergent (different from the Stokes method). We also describe an easy manner to apply algebraic...

A new rapid staining and measuring method has been developed for the quantification of migrated cells in a microchemotaxis chamber. The migrated cells were, after staining, evaluated by a transmission densitometer. The method introduced here is more accurate and faster than those described previously. In addition the technique can be used to determine the adherent capacity of cells.

LEVY, MATTHEW N. AND ELIAS S. IMPERIAL. Oxygen shunting in renal cortical and medullary cajGzrie.s. Am. J. Physiol. 200(l) : 159-162. 1961. -The existence of shunting of oxygen from arterial to venous segments of the renal capillary bed was ascertained from densitometer tracings of renal venous blood after the injection into the renal artery of blood of high oxygen tension and containing optica...

LEVY, MATTHEW N. AND ELIAS S. IMPERIAL. Oxygen shunting in renal cortical and medullary cajGzrie.s. Am. J. Physiol. 200(l) : 159-162. 1961. -The existence of shunting of oxygen from arterial to venous segments of the renal capillary bed was ascertained from densitometer tracings of renal venous blood after the injection into the renal artery of blood of high oxygen tension and containing optica...

A method has been developed for the production of aflatoxin by growing Aspergillus flavus NRRL 3145 on solid substrate wheat. Optimal yields of 900 mug of aflatoxin G(1) and 900 mug of aflatoxin B(1) per g of substrate were obtained in 4 to 5 days at 28 C. A study of aflatoxin production on hulls and groats of oats and on whole oats by A. flavus strains NRRL 2999, NRRL 3000, and NRRL 3145 revea...