For the most curcumin, be sure to use turmeric rather curry powderâa study analyzing curcumin content in 28 spice products described as turmeric or curry powders found that pure turmeric powder had the highest concentration of curcumin, averaging 3.14% by weight.
The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane.
Octane is Knock Resistance. And if you're using the fuel recommended by the automaker, that knock sensor rarely has anything to detect. Pure and simple, a gasoline's octane rating is a measure of its resistance to knock as compared to a particular pair of hydrocarbons. Isooctane, an especially knock-resistant variety, is 100 on the octane scale; at the other extreme, n-Heptane is 0.