Business / Agriculture / Ph: An expression of the intensity of the basic or acidic condition of a liquid or of soil: the logarithmic scale ranges from 0 to 14, where 0 is the most acid, 7 is neutral, and above 7 is alkaline. Natural waters usually have a ph between 6.5 and 8.5. Plants have differing tolerances for acidity and alkalinity.


Business / Finance / Alpha: Measure of risk-adjusted performance. An alpha is usually generated by regressing the security or mutual fund's excess return on the S&P 500 excess return. The beta adjusts for the risk (the slope coe MORE

Subcutaneous Emphysema

Health / First Aid / Subcutaneous Emphysema: Subcutaneous emphysema can be a sign of collapsed lung (pneumothorax). MORE

Nasopharyngeal Airway

Health / First Aid / Nasopharyngeal Airway: Learn the definition of nasopharyngeal airway. MORE