Keith Addison
8 Sep 2004 11:35:06 -0000
Hi Peter >Lot's more if anyone is interested. Yes! Interested. So is the archives. Best wishes Keith >Hi Greg ; > >Yes this is a potentially useful application of >methanol if you don't recover it from the wash water. > >I think it is C3 plants which benefit from methanol >though. From my library "Methanol Production and >Use", 1994, pp 254 : > >"These photosynthetically efficient plants, generally >referred to as C4 plants (plants for which the first >product of photosynthesis is a four carbon sugar), are >generally tropical weeds and comprise a few of our >major food crops, that is, corn, sugar cane, sorghum, >and amaranth. C4 plants generally have higher light >intensity, drought stress and heat tolerances than C3 >plants (plants for which th e first product of >photosynthesis is a tree carbon sugar). With rare >exceptions, all other major food crops are C3 plants >in which photorespiration can occur in sufficiently >high rates to stop growth for several hours per day. > >Photorespiration happens when light and heat are too >intense. "Air contains only about 0.033% carbon >dioxide but about 20% oxygen. Oxygen competes for the >same binding sites as carbon dioxide, that is, for the >enzyme ribulose bisphosphate carboxylase." (Easy for >YOU to say). "When oxygen uptake outcompetes carbon >dioxide uptake by plants in light, the plant is >photorespiratory." In other words, photosysthesis >(growth) stops under heat and drought stress. The >plant withers in the midday sun. Not only does plant >growth stop, but it actually reverses, in that the >sugars previously manufactured during photosysthesis >are sugards are converted back to carbion dioxide and >water during photorespiration. Not a good thing. > >"Theoretically the control of photorespiration across >the food crops of the world could double yields." > >" As a plant source of carbon, methanol is a liquid >concentrate: 1 cc of methanol provides the equivalent >fixed-carbon substrate of over 2,000,000 cc of ambient >air." > >"..but only very low concentrations (usually less than >1% methanol) were previously utilized in laboratory >studies, higher concentrations generally having been >found to be toxic to plant tissues." > >"... the application of 10-100% methanol to some crops >increased photosynthetic productivity. Plant >metabolism of concentrations of methanol that were >previously considered toxic was achieved by >application with high intensity light." > >" Methanol treatments of C3 plants have been found to >reult in growth improvement, but methanol on C4 plants >does not enhance growth. This observation is >consistent with the inhibition of photorepiration by >methanol since C4 plants have very low rates of >photorespiration under high light intensities". > >Lot's more if anyone is interested. > >Best Regards, > >Peter G. >Thailand > > > > >--- Greg Harbican <[EMAIL PROTECTED]> wrote: > > > Don't forget that some plants are C4 type plants and > > when it is hot can not uptake CO2, but, do have the > > ability to uptake methanol instead to use the Carbon > > in it, when they can not uptake CO2, so you may end > > up fertilizing them, instead of killing them. > > > > Greg H. > > ----- Original Message ----- > > From: bioveging > > To: biofuel@yahoogroups.com > > Sent: Monday, September 06, 2004 05:36 > > Subject: [biofuel] Re: Use for wash water > > > > > > My thinks the lye in the water as well as the > > methanol would not > > fair well on the paint :) Although if you have any > > defoliating of > > such things as Poison Ivy it works greeat for > > that. > > > > L. ------------------------ Yahoo! Groups Sponsor --------------------~--> $9.95 domain names from Yahoo!. Register anything. http://us.click.yahoo.com/J8kdrA/y20IAA/yQLSAA/FGYolB/TM --------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://infoarchive.net/sgroup/biofuel/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/biofuel/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/