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.
The grade of gas is set by its octane level. Essentially, the octane rating is a measure of the fuelâs ability to resist knocking, or premature ignition in a cylinder. In this part of the country, regular gas has an octane rating of 87, while premium is 91 or higher.