Vaginal infections. Help for infections. If you have pain, itching, or other symptoms around your vagina, donât try to treat them yourself. Donât risk your health. See a doctor or other health care professional who can figure out the cause and right treatment.Signs that you may have a vaginal infection include itching, burning, pain in or around your vagina, or a problem with your vaginal discharge (fluid).aginal infections. Help for infections. If you have pain, itching, or other symptoms around your vagina, donât try to treat them yourself. Donât risk your health. See a doctor or other health care professional who can figure out the cause and right treatment.
Hydrogenation â to treat with hydrogen â is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum. The process is commonly employed to reduce or saturate organic compounds. Hydrogenation typically constitutes the addition of pairs of hydrogen atoms to a molecule, often an alkene. Catalysts are required for the reaction to be usable; non-catalytic hydrogenation takes place only at very high temperatures.
Asymmetric hydrogenation is a chemical reaction that adds two atoms of hydrogen preferentially to one of two faces of an unsaturated substrate molecule, such as an alkene or ketone.ne of these is in the asymmetric hydrogenation of N-unfunctionalized imines to give primary amines. Such species can be difficult to selectively reduce because they tend to exist in complex equilibria of imine and enamine tautomers, as well as (E) and (Z) isomers.