Something of interest - the preparation of the androstadienone for delivery :
Quote:8.3.1.2 Compounds
The androstadienone solution consisted of a 250 μM concentration of androstadienone (Steraloid Inc.,
London; purity > 98%) in propylene glycol (Sigma Aldrich; purity > 99%) with an odor mask consisting of 1 %
eugenol (Sigma Aldrich, purity > 99%). The control substance consisted of propylene glycol with 1% eugenol.
Same concentrations were used in our previous experiments and in earlier studies (Jacob & McClintock, 2000;
Lundström et al., 2003; Olsson et al., 2006). Both solutions were applied to the subject’s nose via a constant air
flow (2 l/m) using a custom built olfactometer (Boesveldt et al., 2010; Lundström, Gordon, Albrecht, Alden, &
Boesveldt, 2010).
How much dienone in how much PG?
Please correct my math, it's been about 20+ years since I was in the lab...
With a molecular weight of 270.40914 [g/mol], 1 mole of dienone is 270.40914 grams in 1 liter of solution.
1 molar = 270 grams in 1 liter, so 1 micromolar = 270 micrograms in 1 liter.
We have 250 micromolar, so 250 micromolar * 270 micrograms / 1 liter = 67500 mcg in 1 liter.
If 10 ml of the stock solution were used, there would be 67500 mcg/liter * .001 liter/ml= 67.5 mcg/ml for a total of 675 mcg present in 10 ml of solution.
If there was a 1:10 ratio of the PG (ech, they should have used DPG and EtOH..) with 10 ml of the dienone and 90 ml of the PG, then they would get 6.75 mcg per ml final product.
Even a 1 ml dose of 6.75 mcg of androstadienone+dpg is probably too low to elicit the types of responses that folks here in the forum use, and PG as the carrier is very suspect in my mind for having sufficient vapor pressure/boiling point to carry off the dienone properly.
So I would question whether this would be more effectively done as a study using a common by volume 90% EtOH+pheromone : 10% DPG diluent:carrier mix.
I bet Monika didn't have enough mones in her sauce to deliver any relevant reactions - most folks dose around 20-60 mcg of androstadienone to get reactions, and the 40-50 mcg range seems to be pretty commonly reported to get noticeable IOIs. Of course most mones are delivered airborne from the skin and at a range of up to 4-5 feet, so 6-7 mcg directly up the nose may be more significant. I didn't see Pherotruth mentioned in the references, so where did she get her formulation for dispersal of the pheromone?
Besides, the androstadienone would typically be in proportion to other pheromones either from a synthetic blend or in combination with natural pheromones wafting off the pheromoner (new word?), and from what I've read the *proportion* of dienone relative to other pheromones is crucial to the success of the signature.
So an isolated pheromone with no other pheromonal components delivered straight up the schnozz may simply cause the presence of the dienone to make no impact, since other key elements to a signature may be missing.
, at a molar content of 250 micromoles would be 270 mcg * 250 moles in 1 mcl =
250 micromolar solution would be
, each liter would contain 0.925 micrograms of dienone.
one gram of the stock solution would contain 250 micrograms.
Diluted in