Cancer and cancer treatment can make a person more susceptible to infection and increase the risk of gum disease. Alcohol affects oral defense mechanisms. Stress impairs the body's immune response to bacterial invasion.
Magnetometry. Detailed magnetic survey known as magnetometry is an effective and efficient geophysical survey technique used to define areas of past human activity by mapping spatial variations and contrast in the magnetic properties of soil, subsoil and bedrock.
Chronometric definition, a timepiece or timing device with a special mechanism for ensuring and adjusting its accuracy, for use in determining longitude at sea or for any purpose where very exact measurement of time is required. See more.