See Also: Hess, Walter(medicine)
Hess, Walter Rudolf(encyclopedia)
Hess, (Walter Richard) Rudolf(encyclopedia)
pycno-(dictionary)
pycno-(medicine)
Hess' law(medicine)
hess's law(medicine)
Hess screen(medicine)
Hess (as used in expressions)(encyclopedia)
Amerada Hess(finance)

Hess, Walter Rudolf (sh) and pycno- (iou)


Hess, Walter Rudolf (sh)




born March 17, 1881, Frauenfeld, Switz.
died Aug. 12, 1973, Locarno

Swiss physiologist.

He worked at the University of Zurich (1917-51). His interests centred on the nerves that control automatic functions such as digestion and excretion and that also trigger the activities of a group of organs that respond to complex stimuli, such as stress. Using fine electrodes to stimulate or destroy specific areas of the brain in cats and dogs, Hess mapped the control centres for each function to such a degree that he could bring about the physical behaviour pattern of a cat confronted by a dog simply by stimulating the proper points on the cat's hypothalamus. He shared a 1949 Nobel Prize with Antonio Egas Moniz.


pycno- (iou)



pycno- combining form of Greek puknos thick, dense: see -O-. Also pykno-; before a vowel pycn-.
pycno'chlorite noun (Mineralogy) a chlorite having the same silicon content as clinochlore but more iron E20.
pycnocline noun a layer in which water density increases rapidly with depth, esp. in oceans M20.
pycnoco'nidium noun (Botany) = PYCNIDIOSPORE L19.
pycnogon noun = PYCNOGONID noun E20.
pycnohy'drometer noun a combination of a pycnometer and a hydrometer L19.
pyc'nometer noun a vessel used for measuring the relative density of a liquid, using a calibrated capillary M19.
pycno'metric adjective involving or employing a pycnometer E20.
pycnospore noun (Botany) (a) = PYCNIDIOSPORE; (b) = PYCNIOSPORE: L19.