is: [jiào mǔ ]

First, the definition of yeast:

Yeast is some unicellular fungi, not a unit of phylogenetic classification. It is the general name of single-celled fungi in several families, such as Ascomycetes and Basidiomycetes. It generally refers to all kinds of single-celled fungi that can ferment sugars, which can be used in brewing production, some of which are pathogenic bacteria, and are model organisms for genetic engineering and cell cycle research.

2. Yeast can be divided into three categories:

1. Spore-forming strains belong to ascomycetes and basidiomycetes.

2. Those that do not form spores but propagate mainly through budding are called incomplete fungi, or "pseudoyeasts" (yeast-like).

3. At present, it is known that very few yeasts are classified into Ascomycetes. Yeast is widely distributed in nature, mainly growing in acidic, humid and sugary environment, and it is also very important in wine making.

Extended information

Functions of yeast:

1. Medicinal use.

The manufacturing method and properties are the same as those of food yeast. Because it is rich in protein, vitamins, enzymes and other physiologically active substances, it is made into yeast tablets such as mother-eaten tablets in medicine.

2, feed.

it is rich in protein (about 3-4%), B vitamins, amino acids and other substances, and is widely used as a protein supplement for animal feed. It can promote the growth and development of animals, shorten the feeding period, increase the amount of meat and eggs, improve the meat quality and lean meat rate, improve the gloss of fur, and enhance the disease resistance of young livestock.

3. Eat.

In bread production, the osmotic pressure is mainly influenced by sugar and salt. When the sugar content in the formula is ~ 5%, it does not inhibit yeast fermentation, but can promote yeast fermentation. When it exceeds 6%, the fermentation will be inhibited, and when it exceeds 1%, the fermentation speed will be obviously slowed down.

Baidu encyclopedia-yeast