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The curve for E. coli is given in the figure, with the most effective UV light having a wavelength of 265 nm. This applies to most bacteria and does not change significantly for other microbes. Dosages for a 90% kill rate of most bacteria and viruses range between 2,000 and 8,000 μJ/cm 2.
Ultraviolet (UV) is normally hazardous both to microbes and humans. He discovered that a far-UVC band of light within a confined wavelength range around 200 nanometers was cytotoxic to bacteria but appeared, unlike wide band UV, to be absorbed by, and not to penetrate beyond, the outer dead layers of skin, and not to damage eyes.
Natural light exposure has been associated with faster cognitive processing speeds and enhances working memory capacity. [62] Additionally, UV exposure plays a role in motor learning and object recognition memory. Moderate UV exposure enhances cognitive functioning through a specialized glutamate (GLU) biosynthetic pathway in the brain. [63]
In a study Malley co-authored with his graduate student, which was published in the magazine UVSolutions, the duo found that one would have to hold a UV light-emitting wand 0.2 inches away from an ...
Blood irradiation therapy is an alternative medical procedure in which the blood is exposed to low-level light (often laser light) for therapeutic reasons. [1] The practice was originally developed in the United States, [1] but most recent research on it has been conducted in Germany (by UV lamps) and in Russia (in all variants).
A type of bacteria called Deinococcus radiodurans, nicknamed “Conan the Bacterium” for its ability to survive the harshest of extremes, can withstand radiation doses 28,000 times greater than ...
Respiratory virus season is officially here in the U.S., making it a prime time to catch a cold. And because the average adult gets two or three colds a year, you could be dealing with an ...
MAC bacteria should always be considered in a person with HIV infection presenting with diarrhea. [citation needed] The diagnosis requires consistent symptoms with two additional signs: [citation needed] Chest X-ray or CT scan showing evidence of right middle lobe (or left lingular lobe) lung infection