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Hydroquinone, also known as benzene-1,4-diol or quinol, is an aromatic organic compound that is a type of phenol, a derivative of benzene, having the chemical formula C 6 H 4 (OH) 2. It has two hydroxyl groups bonded to a benzene ring in a para position. It is a white granular solid. Substituted derivatives of this parent compound are also ...
Catechol (/ ˈ k æ t ɪ tʃ ɒ l / or / ˈ k æ t ɪ k ɒ l /), also known as pyrocatechol or 1,2-dihydroxybenzene, is an organic compound with the molecular formula C 6 H 4 (OH) 2. It is the ortho isomer of the three isomeric benzenediols .
There are three structural isomers: 1,2-dihydroxybenzene (the ortho isomer) is commonly known as catechol, 1,3-dihydroxybenzene (the meta isomer) is commonly known as resorcinol, and 1,4-dihydroxybenzene (the para isomer) is commonly known as hydroquinone. [1]
Methylparaben is commonly used as a fungicide in Drosophila food media at 0.1%. [5] To Drosophila , methylparaben is toxic at higher concentrations, has an estrogenic effect (mimicking estrogen in rats and having anti- androgenic activity), and slows the growth rate in the larval and pupal stages at 0.2%.
A solution with 1 g of solute dissolved in a final volume of 100 mL of solution would be labeled as "1%" or "1% m/v" (mass/volume). This is incorrect because the unit "%" can only be used for dimensionless quantities.
DOT 5 is a silicone-based fluid and is separate from the series of DOT 2, 3, 4, 5.1. It is immiscible with water, and with other brake fluids, and must not be mixed with them. Systems can change fluid only after a complete system changeover, such as a total restoration.
This glutamate in turn acts on mGluR 2/3 receptors, and at higher doses of acetylcysteine, mGluR 5. [ 57 ] [ 58 ] Acetylcysteine may have other biological functions in the brain, such as the modulation of dopamine release and the reduction in inflammatory cytokine formation possibly via inhibiting NF-κB and modulating cytokine synthesis. [ 55 ]
Clobetasol propionate is used for the treatment of various skin disorders including eczema, herpes labialis, [16] psoriasis, and lichen sclerosus.It is also used to treat several auto-immune diseases including alopecia areata, lichen planus (auto immune skin nodules), and mycosis fungoides (T-cell skin lymphoma).