"Max Redman" <[EMAIL PROTECTED]> spaketh thusly: >Have you used or heard of anyone using colloidal silver as a means of >reducing contamination in the flasks. >Colloidal silver is reputedly very good at preventing bacterial >contamination but I do not know whether it would help in reducing fungal >contamination. >Not being a chemist nor having any viable knowledge in this area , I am >hoping that someone on this world wide fount of knowledge is able to help.
I don't know as "colloidal" silver is truly a colloid; I think it's just silver ions in solution, in which case it's no different from using soluble silver. I've been using silver nitrate in some cultures to control ethylene- a common practice. I haven't seen a difference in contamination, but I've not studied it for that reason. I do know some folks in tissue culture have used silver with some success to control bacterial contamination, but have no idea of the concentrations. -AJHicks Chandler, AZ _______________________________________________ the OrchidGuide Digest (OGD) orchids@orchidguide.com http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com