Exchange Exchange is a marketplace in which shares, options and futures on stocks, bonds, commodities, and indexes are traded. Principal U.S. stock exchanges are: New York Stock Exchange (NYSE), American Stock Exchange (AMEX), and National Association of Securities Dealers Automatic Quotation System (Nasdaq).
From Wikipedia, the free encyclopedia. The DielsâAlder reaction is an organic chemical reaction (specifically, a [4+2] cycloaddition) between a conjugated diene and a substituted alkene, commonly termed the dienophile, to form a substituted cyclohexene system.n a normal demand DielsâAlder reaction, the dienophile has an electron-withdrawing group in conjugation with the alkene; in an inverse-demand scenario, the dienophile is conjugated with an electron-donating group.
Difference Between Cyclic and Non Cyclic Photophosphorylation. Photosynthesis is the process of producing carbohydrates by green plants using CO2 and H2O in the presence of sunlight. It is a two-step process light reaction and dark reaction. Light reaction takes place in the grana of the chloroplast where light energy is converted to chemical energy as ATP and NADPH. In dark reaction, the energy produced in the light reaction is utilized to fix CO2 to carbohydrates. The location of dark reaction is stroma of the chloroplast.