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Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and for many other biological effects.[1][2][3] In humans, the most important compounds in this group are vitamin D3 (cholecalciferol) and vitamin D2 (ergocalciferol).[2][3][4] The major natural source of ...
Vitamin D deficiency or hypovitaminosis D is a vitamin D level that is below normal. It most commonly occurs in people when they have inadequate exposure to sunlight, particularly sunlight with adequate ultraviolet B rays (UVB).[1][2][3] Vitamin D deficiency can also be caused by inadequate nutritional intake of vitamin D; disorders that limit ...
The vitamin D receptor ( VDR also known as the calcitriol receptor) is a member of the nuclear receptor family of transcription factors. [5] Calcitriol (the active form of vitamin D, 1,25- (OH) 2 vitamin D 3) binds to VDR, which then forms a heterodimer with the retinoid-X receptor. The VDR heterodimer then enters the nucleus and binds to ...
A plot of normal distribution (or bell-shaped curve) where each band has a width of 1 standard deviation – See also: 68–95–99.7 rule. Cumulative probability of a normal distribution with expected value 0 and standard deviation 1 In statistics, the standard deviation is a measure of the amount of variation of a random variable expected about its mean.
Mitsubishi F-2. The General Dynamics F-16 Fighting Falcon is an American single-engine supersonic multirole fighter aircraft originally developed by General Dynamics for the United States Air Force (USAF). Designed as an air superiority day fighter, it evolved into a successful all-weather multirole aircraft with over 4,600 built since 1976. [4]
Dissociative identity disorder is characterized by the presence of at least two distinct and relatively enduring personality states. [3] [24] (p331) The disorder is accompanied by memory gaps more severe than could be explained by ordinary forgetfulness. [3] [24] (p331) [25] The personality states alternately show in a person's behavior; [3 ...
Franklin Delano Roosevelt [a] (January 30, 1882 – April 12, 1945), commonly known by his initials FDR, was an American statesman and politician who served as the 32nd president of the United States from 1933 until his death in 1945. He was a member of the Democratic Party and is the only U.S. president to have served four terms in office.
