Oxygen
There are tiny bubbles of air trapped in the dough. As the dough rises the bubbles expand into the holes you refer to. it is a gas.the best example for gas in solid is bread. (u can type this questions in yahoo answers so u can get more information)
Yeast added to bread dough produces a gas, and this causes the dough to rise, making the finished bread look like a sponge.
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In aerobic respiration, due to the lack of oxygen, the glucose isn't fully metabolized which causes the build up of lactic acid. In the production of cheese certain bacteria convert lactose into lactic acid, the lactic acid is important in curdling the milk and breaking down the fats and proteins to make the cheese.
Making bread involves a step called leavening (usually), and that's the part of the operation where your question regarding bread making chemistry is pointing. A leavening agent causes gas to be produced. Be sure to read enough to differentiate the effect of steam (created inside the dough mass) on the finished bread from leavening. Point your cursor to the link and surf on over to our friends at Wikipedia to get the straight scoop. These folks are down with it.
Bread is not "formed" by microorganisms. However, yeast is added to bread dough as leavening. The yeast, consisting of many billions of microorganism, consume and digest sugars in the dough which produces gas. The gas bubbles cause the bread dough to expand or "rise."
i think maybe carbon dioxide
No, air by itself does not make bread rise. In yeast dough, the micro organisms (yeast) consume sugars in the dough and produce gas. The gas bubbles are trapped in molecules of protein in the dough called gluten. These gas bubbles expand and cause the dough to rise. When the dough is baked, the heat makes the gas bubbles expand further producing soft delicious bread.
Air spaces form in bread during the baking process due to the release of carbon dioxide gas produced by yeast as it ferments sugars in the dough. This gas becomes trapped in the gluten structure of the dough, causing it to expand and creating pockets of air in the final bread product.
There are tiny bubbles of air trapped in the dough. As the dough rises the bubbles expand into the holes you refer to. it is a gas.the best example for gas in solid is bread. (u can type this questions in yahoo answers so u can get more information)
Yeast is used in baking bread because it helps the dough rise by producing carbon dioxide gas through fermentation, which creates air pockets in the dough and gives the bread its light and fluffy texture.
While bread dough is proofing, it ferments and produces gas pockets, which are the holes that you see.
The air spaces in bread are produced during the fermentation process when yeast consumes sugars and produces carbon dioxide gas. The gas gets trapped in the gluten network of the dough, causing it to rise and create the airy texture. Additionally, the heat from baking expands the gas, further developing the air spaces in the bread.
Yeast is a type of fungus that is used in making bread because it helps the dough rise by producing carbon dioxide gas through fermentation. This process creates air pockets in the dough, resulting in a light and fluffy texture in the finished bread.
Carbon dioxide is the gas produced by yeast cells during fermentation that causes bread dough to rise through the process of leavening. This gas gets trapped in the dough, creating air pockets that expand and make the bread rise.
The gas, carbon dioxide, forms bubbles in the bread dough, making it "rise".
Yeast added to bread dough produces a gas, and this causes the dough to rise, making the finished bread look like a sponge.