Search results
Results From The WOW.Com Content Network
Steroid isolation, depending on context, is the isolation of chemical matter required for chemical structure elucidation, derivitzation or degradation chemistry, biological testing, and other research needs (generally milligrams to grams, but often more [86] or the isolation of "analytical quantities" of the substance of interest (where the ...
[2] [3] The most familiar type of animal sterol is cholesterol, which is vital to the structure of the cell membrane, and functions as a precursor to fat-soluble vitamins and steroid hormones. While technically alcohols, sterols are classified by biochemists as lipids (fats in the broader sense of the term).
Steroid numbering. Steroid reductases. 5α-Reductase (1, 2, 3) – androgen and neurosteroid synthesis, progestogen metabolism; 5β-Reductase – androgen and progestogen metabolism, neurosteroid synthesis; Conjugation (and deconjugation) Glucuronosyltransferase – steroid metabolism [6] Glucuronidase (β-glucuronidase) – steroid synthesis [7]
The metabolic clearance rate of a steroid is defined as the volume of blood that has been completely cleared of the hormone per unit time. The production rate of a steroid hormone refers to entry into the blood of the compound from all possible sources, including secretion from glands and conversion of prohormones into the steroid of interest ...
Gonane is a tetracyclic hydrocarbon with no double bonds. It is formally the parent compound of the steroids, hence it is called the "steroid nucleus". [1] [4] [5] Some important gonane derivatives are the steroid hormones, characterized by methyl groups at the C10 and C13 positions and a side chain at the C17 position.
In general, corticosteroids are grouped into four classes, based on chemical structure. Allergic reactions to one member of a class typically indicate an intolerance of all members of the class. This is known as the "Coopman classification". [43] [44] The highlighted steroids are often used in the screening of allergies to topical steroids. [45]
Some type of commonly prescribed steroids could lead to changes in the structure of the brain, researchers have claimed. Prolonged use of systemic glucocorticoids – widely used to treat ...
The B-ring of the parent steroid is broken between C9 and C10 to yield D vitamins. A secosteroid (/ ˈ s ɛ k oʊ ˌ s t ɛ r ɔɪ d /) is a type of steroid with a "broken" ring. The word secosteroid derives from the Latin verb secare meaning "to cut", [2]: 241 and 'steroid'. Secosteroids are described as a subclass of steroids under the IUPAC ...