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The SAR for whole body and head is less than 4 and 3.2 Watt per kilogram, which should not exceed 15 and 10 minutes, respectively. In case that body is exposed to a static magnetic field, the amplitude of the magnetic field should not exceed 4 and 8 Tesla for infants and adults, respectively. [ 28 ]
Magnetic separation is also useful in mining iron as it is attracted to a magnet. [3] Another application, not widely known but very important, is to use magnets in process industries to remove metal contaminants from product streams. [1] This takes a lot of importance in food or pharmaceutical industries.
Shortwave (1.6 to 30 MHz) diathermy (where EM waves are used to produce heat) can be used as a therapeutic technique for its analgesic effect and deep muscle relaxation, but has largely been replaced by ultrasound. Temperatures in muscles can increase by 4–6 °C, and subcutaneous fat by 15 °C.
The electromagnet loses them when current and magnetic field are removed. An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. [17] The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the ...
A portative electromagnet is one designed to just hold material in place; an example is a lifting magnet. A tractive electromagnet applies a force and moves something. [8] Electromagnets are very widely used in electric and electromechanical devices, including: Motors and generators; Transformers; Relays; Electric bells and buzzers ...
The iron lung used negative pressure ventilation (NPV), which “mimics natural breathing by creating negative pressure around the chest, causing the lungs to expand and pull in air,” explains ...
The lungs are normally protected against aspiration by a series of protective reflexes such as coughing and swallowing. Significant aspiration can only occur if the protective reflexes are absent or severely diminished (in neurological disease, coma , drug overdose , sedation or general anesthesia ).
Rats are consuming drugs that were seized and stored by Houston police and hundreds of cases could be vulnerable to the rodent infestation, officials said.