Concetti Chiave
- Leavening is a fermentation process involving chemical reactions between sugar and starch, primarily driven by Ascomycetes fungi like Saccharomyces cerevisiae.
- These micro-organisms metabolize starch to produce energy and organic materials, essential for their growth and leavening activity.
- The fermentation process generates carbon dioxide and alcohol, which create leavened dough by forming gas pockets.
- High-gluten flour limits evaporation of these gases, resulting in soft, aerated bread, while low-gluten flour can lead to cracked dough.
- Wheat flour, high in gluten, is ideal for bread making, whereas hard wheat flour is used for pasta due to its lower gluten content.
The leavening process
Leavening is a fermentation from the chemical point of view and fermentation takes place at sugar load with the starch.
Biological agents that operate the leavening are mainly mushrooms belonging to the family of Ascomycetes, especially the saccharomyces species ceresiae, the common yeast (also used in the baking industry because it is rich in vitamin B).
These micro-organisms use starch to obtain energy and organic materials in order to grow.
Effects of gluten on baking
The use of starch leads to the formation of carbon dioxide and alcohol. Both these compounds tend to evaporate and to move away from the dough. If the flour is rich in gluten evaporation is very limited and the bread that you get after cooking will mellow as full of empty spaces left by the gas. If the flour is low in gluten dough tends to crack and let out carbon dioxide which evaporates.
After baking the bread that you get is a little soft.
Types of flour and their uses
Flour from wheat are rich in gluten, therefore suitable for the production of bread.
Flour from hard wheat are less rich in gluten and therefore less suitable for breadmaking; are used for the production of pasta.
Domande da interrogazione
- What role do biological agents play in the leavening process?
- Why are different types of flour used for bread and pasta production?
Biological agents, mainly mushrooms from the Ascomycetes family like saccharomyces cerevisiae, are crucial in the leavening process as they ferment sugars with starch to grow, producing carbon dioxide and alcohol.
Wheat flour, rich in gluten, is ideal for bread due to its ability to trap gases and create a desirable texture. Hard wheat flour, with less gluten, is better suited for pasta, where a firmer structure is preferred.
Accedi a tutti gli appunti
Tutor AI: studia meglio e in meno tempo
