Hydrochloric acid enzyme pepsin by self-cleavage. After leaving the stomach, the hydrochloric acid of the chyme is neutralized in the duodenum by sodium bicarbonate. The stomach itself is protected from the strong acid by the secretion of a thick mucus layer, and by secretin induced buffering with sodium bicarbonate. Heartburn or peptic ulcers can develop when these mechanisms fail. Drugs of the antihistaminic and proton pump inhibitor classes can inhibit the production of acid in the stomach, and antacids are used to neutralize excessive existing acid. Concentrated hydrochloric acid (fuming hydrochloric acid) forms acidic mists. Both the mist and the solution have
Food presentation in food aesthetics is the development of molecular food in Spain, which emphasizes the essence of food using scientific elements. Molecular science can break down the roles of carbohydrates and protein in order to isolate what creates particular tastes. For instance, modern science makes it possible to freeze ice cream using liquid nitrogen and create wine using sugars, creating efficient and visually interesting new dishes. Like other aspects of culture, food presentation is subject to trends and fads. For instance, "unicorn food", a style of presentation that uses a rainbow color palette to decorate food, became popular in 2017. The