Journal of Clinical Investigation49(1970),1838–1846; DOI10.1172/JCI106401. Original publisher byline verifies Juha P. Kokko. Abstract: isolated perfused rabbit descending thin limbs, water efflux when bath osmolality raised with NaCl or raffinose, low sodium permeability. Restricted to tested segment and preparation.
Journal of Clinical Investigation52(1973),612–623; DOI10.1172/JCI107223. Publisher verifies both full bylines. Abstract: isolated perfused rabbit medullary thick ascending limb; net fluid transport remained near zero under imposed osmotic gradients, while tubular NaCl concentration fell. The historical chloride-pump interpretation is not adopted as a complete modern molecular mechanism.