Variables
Threshold in a food is dependent upon:
- The threshold of the aroma in air.
- Concentration in the food
- Solubility in oil and water
- Partition coefficient between the air and the food
- The pH of the food, some aroma compounds are affected by the pH - weak organic acids are protonated at low pH making them less soluble and hence more volatile.
The concentration of an odor above a food is dependent on its solubility in that food and its vapor pressure and concentration in that food.
Read more about this topic: Odor Detection Threshold
Famous quotes containing the word variables:
“The variables are surprisingly few.... One can whip or be whipped; one can eat excrement or quaff urine; mouth and private part can be meet in this or that commerce. After which there is the gray of morning and the sour knowledge that things have remained fairly generally the same since man first met goat and woman.”
—George Steiner (b. 1929)
“The variables of quantification, ‘something,’ ‘nothing,’ ‘everything,’ range over our whole ontology, whatever it may be; and we are convicted of a particular ontological presupposition if, and only if, the alleged presuppositum has to be reckoned among the entities over which our variables range in order to render one of our affirmations true.”
—Willard Van Orman Quine (b. 1908)
“Science is feasible when the variables are few and can be enumerated; when their combinations are distinct and clear. We are tending toward the condition of science and aspiring to do it. The artist works out his own formulas; the interest of science lies in the art of making science.”
—Paul Valéry (1871–1945)