Stocke, Leonard

Stiassny, Eduard ( - ), 14 Stichweh, Rudolf (1951), 133 Stocke, Leonard (1710-1775), 188 Stockhardt, Julius Adolf (1809-1886), 227... 

We verify the density using a sterile hydrometer. A more accurate technique, used by Leonard et al. (8), is to measure the refractive index (RI) which is related linearly to the density. The slope of the straight line can be determined by carefully weighing 25 mL vol of 3 different solutions and measuring the RI at 22°C. A change of density of 0.001 corresponds to a change of 1.5 x 10-4 in RI. Final adjustments of density are made with HBSS (to reduce density) or Percoll stock (to increase density). 

Although in many of these societies chemical topics were discussed, in a few instances the term chemistry even entered into its name. In the literature quite some attention has been paid to eighteenth-century chemical societies in Scotland, England and the United States." The Netherlands offer examples of the same phenomenon. In 1767 the pharmacist, chemist and physician Willem de Loos founded a Chemisch Gezelschap (Chemical Society) in Rotterdam, in which he gave courses on chemistry of a strongly entertaining nature. After De Loos death these lessons were continued for a few years by the then well-known lecturer and physician Leonard Stocke (cf. Table 9.1). ... 

Chapter opener, p. 53 PhotoDisc, Inc./Getty Images, p. 54 Media Bakery, p.55 Corbis Digital Stock, p. 66 (bottom) Ron Occalea/The Medical File/Peter Arnold, Inc. (top) Alan Lind Detrick/Photo Researchers, Inc. p. 69 (left) Erika Craddock/Photo Researchers,Inc. (right) Kaj R. Svensson/Photo Researchers, Inc. p. 71 Image Source/Media Bakery, p. 72 Media Bakery, p. 78 (top) BIOS Borrell Bartomeu/Peter Arnold, Inc. (bottom) Leonard Lessin/Photo Researchers, Inc. 

Shears JR, Antoniadis H, Hueschen M, Leonard W, Miller J, Moon R, Roitman D, Stocking A (1996) Science 273 884... 

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