Not yet registered? Create a OverBlog!

Create my blog

What is yeast?

Yeast has many appliances in food preparation: bread yeast results in fluffy and soft bread, and beer yeast and wine yeast ferment sugar into alcohol. However, there are also types of yeast that cause infections in humans, such as vaginal candidiasis (vaginal candida or thrush).

What is yeast?

Introduction
Yeast is a collective term for many different types of single-celled fungi of the order Saccharomycetales, including more than 1,500 species. They live in different habitats, including in soil, plants and water, but also on the skin and in the intestines of warm-blooded animals, including humans. Yeast reproduce asexually, usually through budding or mitosis. History
Yeast has been used by humans to create bread and alcohol for thousands of years, but it was first microscopically observed in the late 17th century by the Dutch scholar Anton van Leeuwenhoek. However, it was Louis Pasteur, the famous 19th-century French microbiologist, who concluded that yeast were living micro-organisms. How do you get a yeast infection?
Yeast naturally occurs in the human body. The most common causes of a yeast infection is an overgrowth of the naturally occurring yeast fungi Candida albicans. This causes one of the most frequent vagina infections affecting women. Risk factors include pregnancy, excessive douching, wearing tight-fitting clothes, using perfumed soaps and oral contraceptives. Signs of a yeast infection include a white, curd-like discharge, itching and irritation. Male candidiasis is less common, but can be the result of a low immune system (for example in the case of AIDS and cancer patients) or intercourse with an infected person. Yeast infections can clear naturally, although anti-fungal drugs are commonly prescribed. Yeast as a culinary ingredient
The strains of yeast used in cooking are different from those causing infections, commonly belonging to Saccharomyces cerevisiae. When yeast comes in contact with sugar, it ferments, creating carbon dioxide and ethanol (alcohol) in the process. In the case of baking, tiny bubbles in the dough cause it to rise and expand, creating the fluffy texture usually associated with yeast-based breads. The bubbles in sparkling wine are the result of the fermentation process.

Uses of yeast

Yeast is an essential ingredient if you want to make your own bread or certain types of pastry. Most supermarkets sell dried yeast, which are ideal for home baking. Live yeast is harder to find, although an old-fashioned bakery can sometimes help. Self-raising flour does not contain yeast, but chemical leavening agents that embed small gas bubbles in the dough or batter. Yeast is also taken as a dietary supplement (known as brewing yeast) to provide B-complex vitamins, chromium, and selenium. That is also why Marmite is so good for you: it is made of yeast-extract!

Same category articles Products & ingredients

What is protein?

What is protein?

Protein is a substance that is found throughout the body, from the cells to the muscles. It can provide the body with energy, but most importantly, it is vital for repairs within the body and construction of new cells. Find out more about protein in this article.
Benefits of non dairy creamers

Benefits of non dairy creamers

Non dairy creamers can be in liquid or granular form and are intended to be used as a milk or cream substitute. They can be added to coffee or other hot beverages. Much has been written about this product. So, to learn about the benefits of non dairy creamers, read the guide below.
The Source Hot Sauce: The facts

The Source Hot Sauce: The facts

The Source Hot Sauce is the hottest sauce on the market. The average bottle of tabasco sauce measures just under 8,000 Scoville units, but The Source Hot Sauce measures more than seven millions scoville heat units in one drop. When you use this hot sauce, you need to use it sparingly. That's why you'll only find it in one ounce bottles. This article provides you with an overview of The Source Hot Sauce.
How to roast pork?

How to roast pork?

Roasted meat is the key ingredient to any Sunday dinner, and roasted pork is particularly delicious. The perfect roast should have a crusty outside (crispy crackling for pork) and lots of tender, juicy meat inside. In this article, we provide tips for roasting meat, as well as a recipe for pork roast.