IGEM:MIT/2006/Notebook/2008-2-10

General

 * 1 g/mL = 1000000 ppm (from Stephen)
 * 1 ppm = &mu;g/g = &mu;g/ml = ng/mg = pg/&mu;g = 10-6 from
 * molecular weight of isoamyl acetate = 130.19 from
 * The FW of an ion species is equal to its concentration in ppm at 10-3M. Fluoride has a FW of 19, hence a 10-3M concentration is equal to 19ppm, 1M is equal to 19,000 ppm and 1ppm is equal to 5.2 x 10-5M. from


 * 1 g/mL = 1000000000 ppb
 * 1 ppb has 1 gram of substance for every billion grams of solution (http://www.ilpi.com/msds/ref/concentration.html)
 * A solution with 1 ppb of solute has 1 microgram (10-6 g) of material per liter.

Isoamyl alcohol

 * 13.6 &mu;L isoamyl alcohol in 25 mL culture
 * molecular weight of isoamyl alcohol = 88.15 g/mol from
 * specific gravity = 0.813 at 15&deg;C relative to water at 4&deg;C (Merck Index)
 * 5 mM isoamyl alcohol

Salicylic acid

 * 276 ppm salicylic acid
 * molecular weight of salicylic acid = 138.123 g/mol
 * 276 ppm = 1.998e-3 M = 2 mM salicylic acid

Odor thresholds
Also see http://www.leffingwell.com/odorthre.htm

Methyl salicylate

 * molecular weight = 152.15 g/mol
 * odor threshold = 0.1 ppm = 0.7 &mu;M
 * 40 ppb (http://pubs3.acs.org/acs/journals/doilookup?in_doi=10.1021/jf00091a074) = 0.3 &mu;M

Isoamyl acetate

 * molecular weight = 130.18 g/mol
 * odor threshold = 0.22 ppm = 1.7 &mu;M
 * 2 ppb http://www.leffingwell.com/odorthre.htm = 0.002 &mu;M = 20 nM
 * 30 &mu;g/L (http://pubs.acs.org/cgi-bin/article.cgi/jafcau/1997/45/i08/pdf/jf970280a.pdf?isMac=595703) = 0.2 &mu;M