A subduction zone is also generated when two oceanic plates collide â the older plate is forced under the younger one â and it leads to the formation of chains of volcanic islands known as island arcs. Examples include the Mariana Islands in the western Pacific Ocean and the Aleutian Islands, off the coast of Alaska.
Gabriel Synthesis. Gabriel Synthesis is an organic chemical reaction in which primary alkyl halides are transformed into primary amines using potassium phthalimide. This reaction is named after a German chemist Siegmund Gabriel.Pure primary aliphatic amines are prepared from alkyl halides by this method.abriel Synthesis. Gabriel Synthesis is an organic chemical reaction in which primary alkyl halides are transformed into primary amines using potassium phthalimide. This reaction is named after a German chemist Siegmund Gabriel.
PRPP synÂ·theÂ·tase. An enzyme that catalyzes the reaction of Î±- d-ribose 5-phosphate and ATP to produce PRPP and AMP; a regulatory enzyme in purine and pyrimidine biosynthesis; enhanced activity of this enzyme results in an increase in purine biosynthesis leading to gout.1  Facebook.RPP synÂ·theÂ·tase. An enzyme that catalyzes the reaction of Î±- d-ribose 5-phosphate and ATP to produce PRPP and AMP; a regulatory enzyme in purine and pyrimidine biosynthesis; enhanced activity of this enzyme results in an increase in purine biosynthesis leading to gout. 1  Facebook.