Maurice B. Burg was a researcher in renal physiology who developed experimental methods for studying individual nephron segments outside the intact kidney. Isolated tubule perfusion made it possible to relate transport properties to a particular anatomical segment, rather than observing only the final composition of urine.[ref]
Maurice B. Burg (1931–2022), discoverer of kidney transport mechanisms by Mark A. Knepper. Opening remembrance: invention and use of isolated-perfused-nephron techniques
The 1966 method paper by Maurice B. Burg and collaborators described preparations from single rabbit nephrons. Supplying fluid through an isolated renal tubule while controlling its surrounding solution allows the luminal and external conditions to be varied separately.[ref]
Preparation and study of fragments of single rabbit nephrons by M. Burg and others. Original1966 method-paper record and preparation
A useful experiment is to change the surrounding osmolality and compare entering and collected tubular fluid. A change in collected volume can reveal net water movement; changes in solute content address transport of dissolved substances. Isolating the segment constrains where the measured exchange occurred. The preparation simplifies the system while retaining an organized living epithelium, an important middle scale between a whole organ and an isolated protein.
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