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

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Contents

General

  • 1 g/mL = 1000000 ppm (from Stephen)
  • 1 ppm = μg/g = μg/ml = ng/mg = pg/μg = 10-6 from [1]
  • molecular weight of isoamyl acetate = 130.19 from [2]
  • 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 [3]

Isoamyl alcohol

  • 13.6 μL isoamyl alcohol in 25 mL culture
  • molecular weight of isoamyl alcohol = 88.15 g/mol from [4]
  • specific gravity = 0.813 at 15°C relative to water at 4°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

Isoamyl acetate

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