The beginning of the amazing events at Krakatoa in 1883 date to May 20 when there were initial rumblings and venting from the volcano, which had been dormant for about 200 years.
A refinery margin is the revenue associated with refining petroleum, expressed as a value per volume (e.g. $/L), net of the cost of the crude oil input. The simplest refining
Somehow, over the years, refined has. taken on the meaning of being overly processed and. manipulated. In truth, the definition of refine is âto make. pure.â For sugar, the refining process simply separates. natural sucrose from the plant material, without bleach-. ing or chemical manipulation.