Turkish grapefruit, purchased in a local fruit market, was chosen
as the raw material in these experiments. The peels were stripped
with a paring knife. The albedos were cut into small pieces then
were dried in an oven with a gentle flow of air at 50 ◦C. The albedos
were first ground, then screened by sieve, subsequently the
particles smaller than 0.6 mm in diameter were selected