Most hydrocarbons are produced from petroleum distillation, which results in predominantly aliphatic (open-chain) mixtures of hydrocarbons of different chain lengths. Gasoline, for instance, consists of approximately 80 percent saturated and unsaturated aliphatic hydrocarbons of chain length C 4 to C10 and 20 percent aromatic hydrocarbons. Chain length determines the phase of the hydrocarbon at room temperature. Short-chain aliphatic compounds, such as methane, propane, or butane, are gases; long-chain aliphatic compounds, such as tar, are solids. Intermediate-chain (C 5 to C15) aliphatic compounds are in liquid form and account for most hydrocarbon exposures seen in the emergency department (,1.7,4:.,1). Pulmonary toxicity secondary to aspiration is the most common complication from ingesting liquid aliphatic hydrocarbons.

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Dealing With Back Pain

Dealing With Back Pain

Deal With Your Pain, Lead A Wonderful Life An Live Like A 'Normal' Person. Before I really start telling you anything about me or finding out anything about you, I want you to know that I sympathize with you. Not only is it one of the most painful experiences to have backpain. Not only is it the number one excuse for employees not coming into work. But perhaps just as significantly, it is something that I suffered from for years.

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