Professional Requirements. To become a medical director requires each applicant to have a medical degree with board certification in family medicine, emergency care or occupational health, along with many years of medical experience. Potential employers also look for candidates with several years of medical management experience.
NOx is a generic term for the mono-nitrogen oxides NO and NO 2 (nitric oxide and nitrogen dioxide). They are produced from the reaction among nitrogen, oxygen and even hydrocarbons (during combustion), especially at high temperatures.In areas of high motor vehicle traffic, such as in large cities, the amount of nitrogen oxides emitted into the atmosphere as air pollution can be significant.hey are produced from the reaction among nitrogen, oxygen and even hydrocarbons (during combustion), especially at high temperatures. In areas of high motor vehicle traffic, such as in large cities, the amount of nitrogen oxides emitted into the atmosphere as air pollution can be significant.
Nitrogen Cycle. The nitrogen cycle is dominated by the N2 gas in the atmosphere. Nitrous oxide, N2O is the second common form. N20 (the gas commonly known as laughing gas) is a greenhouse gas. Seventy-nine percent of the atmosphere is nitrogen in the form of N2 gas. Because N2 has low reactivity, it offsets the high reactivity of oxygen, O2, the other major constituents of the atmosphere. For example when we light a match, the nitrogen does not burn with the oxygen.