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Created with Fabric.js 1.4.5 Chemical Reaction:When water is added to flour to make dough, it allows these proteins to bond together and from a new protein called gluten. Kneading the dough intensifies these gluten bonds. After the dough is place into a heated oven, it begins to rise and grow the gluten network. This network eventually hardens during the baking process, giving the inside of a loaf of bread or similar baked good its signature structure. Baking soda achieves this by reacting with acids in the dough to produce carbon dioxide gas, which puffs up the dough. Baking powder releases carbon dioxide twice during the entire baking process -- once when it hits water and once when it reaches a certain temperature in the oven. When yeast is added to dough, it begins to feed on starches -- producing sugars, alcohol and carbon dioxide as byproducts. As with baking powder and baking soda, the carbon dioxide produced by yeast causes the dough to rise. Maillard reactions occur when proteins and sugars are broken down and rearranged by high temperatures. These sugars and proteins can be derived from flour by itself, or they can be enhanced with the addition of sugars and eggs. The reactions produce ring-shaped organic compounds that darken the surface of baking dough. Maillard reactions also produce toasty and savory aromas and flavor compounds. These compounds also react among each other, producing even more complex aromas and flavors. Caramelization, which occurs at 356 degrees Fahrenheit, is the last chemical reaction to occur during the baking process. The reaction occurs when high heat causes sugar molecules to break down and release water, which turns into steam. Diacetyl, which gives caramel its butterscotch flavor, is produced during the first stages of caramelization. Next, esters and lactones. Finally, the production of furan molecules imparts a nutty flavor, and a molecule called maltol imparts a toasty flavor. Sources:http://scienceprojectid easforkids.comhttp://www.education. httpnzic.org.nz
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