The range of the radar horizon dependson the height of the antenna and on the amount of bending of the radar wave.The bending is caused by diffraction and refraction. Diffraction is a propertyof the electromagnetic wave itself. Refraction is due to the prevailingatmospheric conditions.
Anaerobic bacteria, or anaerobes, are bacteria that do not need oxygen to live. In humans, these bacteria generally live in the gastrointestinal tract, but they may also be found in other places outside the body, including in the soil and water, in foods, and in animals.
Bacteroides are some of the most common anaerobic bacteria species in the foot wounds of diabetics. Often, anaerobes co-exist with aerobic bacteria, which need oxygen to thrive. This is common in foot ulcers, which makes them more difficult to treat. Other anaerobes, such as those in the Actinomyces genus, can cause dental infections within the mouth.