DNA Repair Disorders. Four genetic disorders of the skin are caused by the inability of cells to remove damage caused by sunlight to DNA, the genetic material.our genetic disorders of the skin are caused by the inability of cells to remove damage caused by sunlight to DNA, the genetic material.
Excerpt from Petroleum Refining Industry Profile. Companies in this industry refine crude oil to produce fuel and other products. Major companies include Chevron, Exxon Mobil, and Valero (headquartered in the US); BP (UK); and Royal Dutch Shell (the Netherlands).Worldwide, the petroleum refining industry processes about 95 million barrels of crude oil each day, including about 18 million barrels per day refined in the US.The countries with the largest refining capacity are the US, China, Russia, India, Japan, and South Korea.ajor companies include Chevron, Exxon Mobil, and Valero (headquartered in the US); BP (UK); and Royal Dutch Shell (the Netherlands). Worldwide, the petroleum refining industry processes about 95 million barrels of crude oil each day, including about 18 million barrels per day refined in the US.
Downstream sector. The downstream sector of the oil and gas industry involves the refining of the crude oil and/or raw natural gases obtained in the upstream sector as well as selling or distributing the products obtained.he downstream sector of the industry is the sector that relates with the consumers. Facilities involved in this sector include petrochemical plants, oil refineries, natural gas distribution companies, retail outlets and so forth.