Raising agents introduce carbon dioxide gas into foods - by chemical reaction. They're intended to make pastries and bread food more palatable.
I'm not sure what you mean by mechanical, but raising agents like baking soda, baking powder, and yeast make foods light and fluffy.
Bread recipes can contain various raising agents, such as yeast, baking soda and baking powder.
Function of raising agents in a muffin?
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Normally not. Bread flour is does not contain chemical leavening agents, whereas self raising flour does. (So you'd be adding in additional raising agents which will probably mess up the end result). Also, self raising flour has a lower protein and gluten content, when compared to bread flour; this means that if you were to make bread with self raising flour, it would be prone to collapsing and is likely to remain undderisen/crumbly.
air and yeast
what foods contain alginates
oxygen nitrogen carbon dioxide
Shortcrust pastry is classically made without raising agents - just plain flour, butter, salt and water.
It makes the product light and fluffy and springy and airy.
Micro-nutrients are classed into 2 groups;VitaminsMineralsAnd so, foods that contain micro-nutrients are foods that contain minerals or vitamins.