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.
Learn more >. Gasoline blended with ethanol Almost all gasoline now has some ethanol in it, including Exxon- and Mobil- branded gasoline which currently contains up to 10%. Learn more >. Octane ratings of gasoline Find out what octane ratings measure and what octane level is right for your vehicle.