Over the past decade, evidence-based practice in the ï¬eld of medicine has emerged as the model. on which EBE seems to be based. Therefore, we examine this medical model. in detail, compare it with EBE, and use it as a basis for projecting likely. opportunities for development of EBE products and services.
There are four types of crude oil: Class A: Light, Volatile Oils: These oils are highly fluid and highly toxic to humans, and include jet fuel and gasoline. Class B: Non-Sticky Oils: These oils are waxy and less toxic to humans, and include diesel fuel and light crude oil. Class C: Heavy, Sticky Oils: These oils are brown or black and sticky or tarry, and include most crude oils. Their toxicity is low, but if spilled, their impacts on waterfowl and wildlife can be severe.
2013-06-03 10:54:32. Some marker crudes with their sulfur content (horizontal) and API gravity (vertical) and relative production quantity.See also: Benchmark (crude oil). The petroleum industry generally classifies crude oil by the geographic location it is produced in (e.g.West Texas Intermediate, Brent, or Oman), its API gravity (an oil industry measure of density), and its sulfur content.ach crude oil has unique molecular characteristics which are understood by the use of crude oil assay analysis in petroleum laboratories. Barrels from an area in which the crude oil's molecular characteristics have been determined and the oil has been classified are used as pricing references throughout the world.