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.
So the South African AA recommends 95 octane gasoline (petrol) at low altitude and 93 octane for use in Johannesburg because The higher the altitude the lower the air pressure, and the lower the need for a high octane fuel as there is no real performance gain.