Enzymes /ËÉnzaÉªmz/ are macromolecular biological catalysts. Enzymes accelerate, or catalyze, chemical reactions. The molecules at the beginning of the process are called substrates and the enzyme converts these into different molecules, called products.ome household products use enzymes to speed up chemical reactions: enzymes in biological washing powders break down protein, starch or fat stains on clothes, and enzymes in meat tenderizer break down proteins into smaller molecules, making the meat easier to chew.
From Wikipedia, the free encyclopedia. An Audiometrist (from Latin audÄ«re, to hear; and from Italian -metria, âto measureâ ) or Audiometric Officer, is a health-care professional technician who has received special training in the use of Pure tone audiometry equipment.
Audible is the largest provider of digital audio books for download. Audibleâs content includes over 85,000 titles by more than 600 different providers, amounting to over 125,000 hours of audio programming. Audible audio files are compatible with over 500 models of audio players, PDAs, streaming media devices and mobile phones (including iPhone, BlackBerry and Android phones).