What Does High Hemoglobin Mean? High hemoglobin levels mean that measured hemoglobin levels are above the upper limits of normal for the age and sex of the person (see above normal values). For example, a 19 year old that has a detected hemoglobin level of above 17.7 g/dl would have a high hemoglobin level.
Some chemical engineers specialize in a particular process, such as oxidation (a reaction of oxygen with chemicals to make other chemicals) or polymerization (making plastics and resins).
Also, chemical engineers work on problems of energy conservation and environmental pollution. See an excellent description of all the different kinds of work that chemical engineers do and the different kinds of careers open to chemical engineers, prepared by the Cornerstone Center. Learn about the many significant advancements that chemical engineers have made to our world.