Talk:Osmotic pressure
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[edit] Which value of R?
This article says R = 8.314 but in all the osmotic pressure calculations I have done at uni we have used 0.08206 L atm mol K. Does anyone object to changing this? --Mdhowe 04:34, 18 October 2006 (UTC)
[edit] Turgor vs. osmotic pressure
I know this phenomenon as Osmotic pressure. I thought everybody did?
- I had learned this phenomenon as "osmotic pressure". A quick google test gives ~100,000 results for "turgor" and ~175,000 for "osmotic pressure". I had imagined "turgor" would get more hits because it is one word, but it seems "osmotic pressure" is the correct term. In lieu of this information, I suggest this page be moved to "osmotic pressure" with appropriate redirects. -- Bubbachuck 04:07, 9 August 2005 (UTC)
Turgid and flacid plant parts
I am going to add a short description of turgid and flacid plant parts with a link to the article stoma. It seems like a good idea to me. Thoughts? 160.94.120.197 17:11, 19 October 2005 (UTC)lotusduck
What about turgour and erectile body parts. Does this not deseve a mention?--Light current 00:44, 11 January 2006 (UTC)
[edit] Osmotic pressure
I understand osmotic pressure as follows:
Solution in semipermeable membrane (permeable only to solvent) exposed to pure solvent. The osmotic pressure is the physical pressure applied to the solution required to prevent movement of pure solvent into the solution.
Another, less accurate, way to define it is the pressure a solution exerts through a semipermeable membrane to draw more solvent into itself.
I have never heard of "turgor pressure" and many erectile tissues in animals rely on blood flow rather than osmosis.
[edit] Turgor-Osmotic Pressure
Tugor and osmotic pressure are different things. Osmotic pressure is the pressure applied from the outside of the cell that pushes the water in. We could say it is the tendancy to take water. (http://edtech.clas.pdx.edu/osmosis_tutorial/osmotic_pressure3.html) and (http://www.wisc-online.com/objects/index_tj.asp?objid=NUR4004) Turgor pressure is from inside of the cell done by the water inside. (http://www.cartage.org.lb/en/themes/Reference/dictionary/Botanical/T/Turgor.html) Klesk
- Turgor and Osmotic pressure should definitely be separated. Not only they are somewhat different things, but "turgor" also has some different meanings. American Heritage Dictionary:
tur·gor (tûr'gər, -gôr') n.
- The state of being turgid.
- Biology. The normal fullness or tension produced by the fluid content of blood vessels, capillaries, and plant or animal cells.
[edit] Separation of Topics
I have separated out the osmosis and turgor pressure information as osmotic pressure is the cause of turgor pressure, but they are not the same thing. Please feel free to add to either article. pschemp | talk 03:22, 9 July 2006 (UTC)
[edit] Psi not pi...
I think the symbol's wrong here: π = iMRT.
(I don't know how to change it, so I thought I'd just comment —The preceding unsigned comment was added by 90.240.242.118 (talk) 14:18, 3 March 2007 (UTC).
