Naslov
The effect of the elasticity of membrane on the stability of the solvent in osmotic process at constant volume

Autori
Županović, Paško ; Brumen, Milan ; Kuić, Domagoj ; Fajmut, Aleš ; Juretić, Davor

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Workshop programme and abstracts / - Jena, 2010, 18-18

Skup
Workshop on MAXIMUM ENTROPY PRODUCTION IN THE EARTH SYSTEM

Mjesto i datum
Jena, Njemačka, 10.05.2010. - 12.05.2010

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
osmosis; negative pressure; cavitations; xylem-phloem; embolism repair

Sažetak
The solvent in osmosis at constant volume is under negative pressure [1-4]. Negative pressure in solvent and osmotic pressure in solution are found as the function of the concentration of solute, geometry and elastic properties of the semipermeable membrane. It is known that the tensile state of the isolated solvent is not stable and cavitations turn it into stable state of coexisting gas and liquid. Using plausible arguments it is shown that this transition of the tensile solvent to coexisting phase can be reversible due to the elasticity of the semipermeable membrane. The reverse transition is diffusion and it is much slower that spontaneous direct transition. This mechanism is proposed as possible explanation of the embolism repair and refilling [5-7] in xylem-phloem system of land plants. References [1] Hirsch, H.R. “Gedanken Experiment”: Negative Solvent Pressure in Osmosis. J. Biol. Physics, 1980, 8, 11-13. [2] Freeman , R.D. Comment on Hirsch’s “Gedanken Experiment”: Negative Solvent Pressure in Osmosis. T J. Biol. Physics, 1981, 9, 47. [3] Hirsch, H.R. Further comments on Negative Solvent Pressure in Osmosis. J. Biol. Physics, 1983, 11, p. 26. [4] Scholander, P.F. The Role of Solvent Pressure in Osmotic Systems. Botany, 1966, 55, 1407-1414. [5] Zimmermann, U., Schneider, H., Wegner, L. H. and Haase, A. Water ascent in tall trees: does evolution of land plants rely on a highly metastable state? New Phytol., 2004, 162, 575-615. [6] Holbrook, N.M. and Zwieniecki, M.A. Embolism Repair and Xylem Tension: Do We Need a Miracle? 1999, Plant Physiology, 1999, 120, 7–10, [7 ] Zwieniecki, M.A. and Holbrook, N.M. Confronting Maxwell’s demon: biophysics of xylem embolism repair. Trends in Plant Science, 2009, 14, 530-534.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Biologija

POVEZANOST RADA