LEAVEN - определение. Что такое LEAVEN
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Что (кто) такое LEAVEN - определение

SUBSTANCE WHICH LIBERATES GAS AND THEREBY INCREASES THE VOLUME OF A DOUGH OR BATTER
Leavening; Raising agent; Leaven; Unleavened; Leavener; Leavening agents; Leaven agent; Biological leavening

leaven         
['l?v(?)n]
¦ noun
1. a substance, typically yeast, added to dough to make it ferment and rise.
dough reserved from an earlier batch in order to start a later one fermenting.
2. a pervasive influence that modifies something or transforms it for the better.
¦ verb
1. [usu. as adjective leavened] cause (dough or bread) to ferment and rise by adding leaven.
2. permeate and modify or transform for the better.
Origin
ME: from OFr. levain, based on L. levamen 'relief' (lit. 'means of raising'), from levare 'to lift'.
Leaven         
·vt To make light by the action of leaven; to cause to ferment.
II. Leaven ·noun Anything which makes a general assimilating (especially a corrupting) change in the mass.
III. Leaven ·vt To Imbue; to Infect; to Vitiate.
IV. Leaven ·noun Any substance that produces, or is designed to produce, fermentation, as in dough or liquids; ·esp., a portion of fermenting dough, which, mixed with a larger quantity of dough, produces a general change in the mass, and renders it light; yeast; barm.
leaven         
I. n.
1.
Yeast, ferment, barm, fermenting substance.
2.
Pervading influence.
II. v. a.
1.
Produce or excite fermentation in, ferment, raise, lighten.
2.
Imbue, pervade, permeate, tinge, color, inspire, elevate, lift.
3.
Imbue, infect, vitiate, taint.

Википедия

Leavening agent

In cooking, a leavening agent () or raising agent, also called a leaven () or leavener, is any one of a number of substances used in doughs and batters that cause a foaming action (gas bubbles) that lightens and softens the mixture. An alternative or supplement to leavening agents is mechanical action by which air is incorporated (i.e. kneading). Leavening agents can be biological or synthetic chemical compounds. The gas produced is often carbon dioxide, or occasionally hydrogen.

When a dough or batter is mixed, the starch in the flour and the water in the dough form a matrix (often supported further by proteins like gluten or polysaccharides, such as pentosans or xanthan gum). The starch then gelatinizes and sets, leaving gas bubbles that remain.

Примеры употребления для LEAVEN
1. Her intention was always to be there, to leaven anywhere with the familiarity of her presence.
2. Heat up a hoary national stereotype, leaven with wit, sit back and watch "les rosbifs" simmer.
3. Scientists behind China‘s effort have been careful to leaven their confidence with warnings that space exploration has always been risky.
4. There was also a big rush outside «tamees» (leaven bread) vendors causing the customers to wait for an hour or more for their turn.
5. As a result, what is taught in Chinese schools as evil foreign intervention is still widely regarded in Shanghai as a leaven in its culture.