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 rating is used to judge the volatility of gasoline. Lower the rating, easier it is for the gasoline to burn. It is based on the antiknock index that represents the gasoline's ability to resist pre-ignition, or engine knock. Higher the octane rating, lesser is the knocking.