Joly Dixon - Wikipedia
Henry Joly Dixon CMG is a retired member of the European Civil Service, who served from 1993 to 2003 as Director of International Affairs in the Directorate-General for Economic and Financial Affairs of the European Commission. [2] Before that he served in the cabinet of President Jacques Delors, [2] where he was described as "his right-hand ...
4.5.1.3: Cohesion-Tension Theory - Biology LibreTexts
Provide experimental evidence for the cohesion-tension theory. In 1895, the Irish plant physiologists H. H. Dixon and J. Joly proposed that water is pulled up the plant by tension (negative pressure) from above. As we have seen, water is …
Henry Horatio Dixon | Botany, Plant Ecology, Evolutionary …
2024年12月16日 · Henry Horatio Dixon was an Irish botanist who investigated plant transpiration and, with John Joly, developed the tension theory of sap ascent. Dixon studied at Trinity College, Dublin, and the University of Bonn; he became professor of botany at Trinity (1904) and director of the botanical gardens
19th Century Experiments Explained How Trees Lift Water
2017年2月1日 · In a series of manipulations, Dixon and Joly showed that water in a tube could be placed under tension—the way pulling on a rope places it under tension. The two researchers, drawing together pieces of a number of earlier theories, proposed in full what would be known to posterity as the cohesion-tension theory.
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NATURE 813
Joly, Dixon developed the cohesion theory of the ascent of sap. This classical work, published in 1894, was the precursor of many physiological and morpho
Copyright L.H. Bailey Hortorium, Cornell University
Henry Horatio Dixon was an Irish plant physiologist who, with physicist John Joly, described the mechanism of the flow of sap through the xylem against gravity (cohesion-tension theory). Born in Dublin, he graduated with first-class honors in natural science from Trinity College in 1891, and went on to study at Bonn before returning to Trinity ...
Henry Horatio Dixon - Wikipedia
Henry Horatio Dixon FRS [1] (19 May 1869, Dublin – 20 December 1953, Dublin) was a plant biologist and professor at Trinity College Dublin. Along with John Joly, he put forward the cohesion-tension theory of water and mineral movement in plants. [1] [2]
The Theory of the Rise of Sap in Trees: Some Historical and
2013年9月3日 · Dixon and Joly showed empirically that water with dissolved air can survive a significant degree of tension without fracturing, and, as we shall see below, they anticipated the rudiments of later work explaining why sap doesn’t boil in the xylem conduits.
Dixon, Henry Horatio | Dictionary of Irish Biography
Some say that it was probable that Joly was the chief originator of the idea and that Dixon carried out the detailed experiments (McDowell (1982), 410). This theory was elaborated during the 1890s with additional work done on transpiration, osmosis, and the tensile strength of water.
Joly Dixon – seamus dubhghaill
Henry Horatio Dixon, plant biologist and professor at Trinity College, Dublin, is born in Dublin on May 19, 1869. Along with John Joly, he puts forward the cohesion-tension theory of water and mineral movement in plants. Dixon is the youngest of the seven sons of George Dixon, a soap manufacturer, and Rebecca (née Yeates) Dixon.