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  1. en.wikipedia.org › wiki › Vitamin_DVitamin D - Wikipedia

    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 ...

  2. 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 ...

  3. en.wikipedia.org › wiki › PanthenolPanthenol - Wikipedia

    Panthenol (also called pantothenol) is the alcohol analog of pantothenic acid (vitamin B 5 ), and is thus a provitamin of B 5. In organisms, it is quickly oxidized to pantothenic acid. It is a viscous transparent liquid at room temperature. Panthenol is used in pharmaceutical and cosmetic products as a moisturizer and to improve wound healing.

  4. en.wikipedia.org › wiki › DNADNA - Wikipedia

    In a DNA double helix, each type of nucleobase on one strand bonds with just one type of nucleobase on the other strand. This is called complementary base pairing.Purines form hydrogen bonds to pyrimidines, with adenine bonding only to thymine in two hydrogen bonds, and cytosine bonding only to guanine in three hydrogen bonds. . This arrangement of two nucleotides binding together across the ...

  5. en.wikipedia.org › wiki › DerivativeDerivative - Wikipedia

    where the vertical bars denote the absolute value.This is an example of the (ε, δ)-definition of limit. If the function is differentiable at , that is if the limit exists, then this limit is called the derivative of at .Multiple notations for the derivative exist. The derivative of at can be denoted ′ (), read as "prime of "; or it can be denoted (), read as "the derivative of with respect ...

  6. en.wikipedia.org › wiki › ChloropicrinChloropicrin - Wikipedia

    Chloropicrin, also known as PS (from Port Sunlight[4]) and nitrochloroform, is a chemical compound currently used as a broad-spectrum antimicrobial, fungicide, herbicide, insecticide, and nematicide.[5] It was used as a poison gas in World War I and the Russian Invasion of Ukraine.[6] Its chemical structural formula is Cl3C−NO2.

  7. en.wikipedia.org › wiki › Lyse_DoucetLyse Doucet - Wikipedia

    Lyse Marie Doucet CM OBE (/ l iː z d uː ˈ s ɛ t /; born 24 December 1958) is a Canadian journalist who is the BBC's Chief International Correspondent and senior presenter. She presents on BBC World Service radio and BBC World News television, and also reports for BBC Radio 4 and BBC News in the United Kingdom. ...

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