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Testosterone stearate, also known as testosterone octadecanoate, testosterone 17β-stearate, and androst-4-en-17β-ol-3-one 17β-stearate, is an injected anabolic-androgenic steroid (AAS) and an androgen ester – specifically, the C17β stearate (octadecanoate) ester of testosterone – which was never marketed.
Lithium stearate is an important component of grease. The stearate salts of zinc, calcium, cadmium, and lead are used as heat stabilizers for PVC. Stearic acid is used along with castor oil for preparing softeners in textile sizing. They are heated and mixed with caustic potash or caustic soda.
Stearoyl–CoA (black) held in a kinked conformation by SCD1's binding pocket which determines which bond is desaturated. (Stearoyl-CoA desaturase (SCD; EC 1.14.19.1) is an iron-containing enzyme that catalyzes a rate-limiting step in the synthesis of unsaturated fatty acids.
Mutations and associated deficiency have not been reported in humans. [14] Knockout mice show altered ovarian sex steroid production, normal puberty, and severe subfertility due to defective luteinization and ovarian progesterone production. [15] HSD17B2: Describable as "antiestrogenic" and "antiandrogenic". [16]
Arnold Schwarzenegger has spoken out about his history with drug use, with the actor encouraging bodybuilders not to use steroids.. The 75-year-old reflected on his days as a bodybuilder during a ...
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 ...
In enzymology, a steroid Δ 5-isomerase (EC 5.3.3.1) is an enzyme that catalyzes the chemical reaction a 3-oxo-Δ 5 -steroid ⇌ {\displaystyle \rightleftharpoons } a 3-oxo-Δ 4 -steroid Hence, this enzyme has one substrate , a 3-oxo-Δ 5 -steroid , and one product , a 3-oxo-Δ 4 -steroid .
Estradiol stearate has no affinity for the estrogen receptor, requiring transformation into estradiol via esterases for its estrogenic activity. [7] [8] [9] [5] The compound does not bind to sex hormone-binding globulin or α-fetoprotein, instead being transported by lipoproteins such as high-density lipoprotein and low-density lipoprotein. [5]