The importance of yeast for humans The by-products of fermentation—carbon dioxide and alcohol— have been used by humans for centuries in the production of breads and alcoholic beverages. Before the mid-nineteenth century, however, bakers and brewers knew very little about the nature of the organisms that helped make their products. The experiments of French microbiologist Louis Pasteur (1822–1895) showed that fermentation could only take place in the presence of living yeast cells. He also deduced that anaerobic conditions were necessary for proper fermentation of wine and beer (in the presence of oxygen, yeast convert alcohol to acetic acid [vinegar]). Brewer’s yeast is added to liquids derived from grains and fruits to brew beer and wine. The natural starches and sugars in the liquids provide food for the yeast. Deprived of oxygen during the fermentation process, yeast produce alcohol as a by-product of incomplete sugar breakdown. Yeast that occur naturally on the skins of grapes also play a vital role in fermentation, converting the sugars of grapes into alcohol for wine production. Baker’s yeast, another variety of yeast, are added to a dough made from the starchy portion of ground grains (such as wheat or rye flour). The yeast break down some of the starch and sugar present in the mixture, producing carbon dioxide. The carbon dioxide bubbles through the dough, forming many air holes and causing the bread to rise. Since oxygen is present, no alcohol is produced when the bread is rising. When the bread is baked, the air holes give the bread a lighter texture. In recent times, yeast have been used to aid in the production of alternative energy sources that do not produce toxic chemicals as byproducts. Yeast are placed in huge vats of corn or other organic material. When fermentation takes place, the yeast convert the organic material into ethanol fuel. Present-day geneticists are working on developing yeast strains that will convert even Source
So are you going to bake us something or are you just tempting us? :shrug: Please Register or Log in to view the hidden image!
Yeast? It's also good for creating major problems for women's pussy, ain't it? Hmm, is that the same kind of yeast? Could you just scoop the yeast out of a woman's vagina and use it to make delicious bread? Baron Max
Or beer ! There are at least hundreds of yeast types though. Hrm.. wiki says 1500. http://en.wikipedia.org/wiki/Yeast
I always heard white yeast and white sugar are terrible for you.It causes all kinds of health problems or at least makes existing health problems worse. Or is there good and bad yeast?
Ever hear of prison hooch? Prisoners will take fruit from the cafe and store it in a garbage bag in their cells, add some water and don't wash their feet for a few days and periodically soak their feet in the mixture to add yeast! Must taste delicious!
Yeasts are all and well for making good brews. Yeasts are molds. But note also the dangers of molds. If toxic molds get into your brain stem your chemicals go whacked out. That's why brewing beer is so exact, you must do it all correctly.
