> Can you confirm or correct my impression that... something with half life of 12 months would be reduced by half in a year, by 3/4 in 2 years, by 7/8 in 3 years and so on ad infinitum. And, moreover, if this takes into consideration the breakdown products and their half-lives? Sometimes those products can be worse than the original product. (Not saying this is necessarily the case here). *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html Access BEE-L directly at: http://community.lsoft.com/scripts/wa-LSOFTDONATIONS.exe?A0=BEE-L