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flour (n.)
1.fine powdery foodstuff obtained by grinding and sifting the meal of a cereal grain
flour (v.)
1.convert grain into flour
2.cover with flour"flour fish or meat before frying it"
Flour (n.)
1.(MeSH)Ground up seed of WHEAT.;Ground up seed of durum wheat.
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Merriam Webster
FlourFlour (flour), n. [F. fleur de farine the flower (i.e., the best) of meal, cf. Sp. flor de la harina superfine flour, Icel. flür flower, flour. See Flower.] The finely ground meal of wheat, or of any other grain; especially, the finer part of meal separated by bolting; hence, the fine and soft powder of any substance; as, flour of emery; flour of mustard.
Flour bolt, in milling, a gauze-covered, revolving, cylindrical frame or reel, for sifting the flour from the refuse contained in the meal yielded by the stones. -- Flour box a tin box for scattering flour; a dredging box. -- Flour dredge or Flour dredger, a flour box. -- Flour dresser, a mashine for sorting and distributing flour according to grades of fineness. -- Flour mill, a mill for grinding and sifting flour.
FlourFlour, v. t. [imp. & p. p. Floured (?); p. pr. & vb. n. Flouring.]
1. To grind and bolt; to convert into flour; as, to flour wheat.
2. To sprinkle with flour.
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⇨ voir la définition de Wikipedia
Flour (n.) (MeSH)
flour (n.)
Voir aussi
flour (v.)
↗ farina, meal, wheat flour, wheatmeal
⇨ Fish Flour • Mediterranean flour moth • Semolina Flour • cereal flour • flour beetle • flour bin • flour corn • flour mill • flour milling • flour weevil • graham flour • pea flour • plain flour • potato flour • self-raising flour • self-rising flour • soy flour • soya flour • soybean flour • tapioca flour • wheat flour • whole meal flour • whole wheat flour
⇨ Almond flour • Anglards-de-Saint-Flour • Arrondissement of Saint-Flour • Arvada Flour Mill • Atta flour • Besan flour • Bishops of Saint-Flour • Boston Flour Mill • Bread flour • Confused flour beetle • Daisy Flour Mill • Destructive flour beetle • Dingo Flour sign • Enriched flour • Flour (album) • Flour (band) • Flour (disambiguation) • Flour Babies • Flour Bluff High School • Flour Bluff Independent School District • Flour Bluff, Corpus Christi, Texas • Flour Bridge • Flour Child • Flour City Ornamental Iron Works Company • Flour Cove • Flour Exchange Building • Flour Mite • Flour Riot of 1837 • Flour War • Flour War of 1775 • Flour beetle • Flour bleaching agent • Flour bomb • Flour mite • Flour riot • Flour tortilla • Flour treatment agent • Flour's Cove • Graham flour • Gram flour • International Union of United Brewery, Flour, Cereal, Soft Drink and Distillery Workers • J. Y. Dykman Flour and Feed Store • King Arthur Flour • Luv 713/Flour • Maida flour • Mediterranean Flour Moth • Nippon Flour Mills • Peanut flour • Quaker Flour Mill • Red flour beetle • Rice flour • Rock flour • Roman Catholic Diocese of Saint-Flour • Saint-Flour • Saint-Flour (Cantal) • Saint-Flour Cathedral • Saint-Flour, Cantal • Saint-Flour, Puy-de-Dôme • Saint-Flour-de-Mercoire • Self raising flour • Self rising flour • Self-raising flour • Self-rising flour • Sharp (flour) • Silver State Flour Mill • St-Flour • St. Flour • Swany White Flour Mills • Vallejo Flour Mill • Wheat flour • Whole wheat flour • Whole-wheat flour • Wholewheat flour • Wood flour • Wright's Flour Mill
Flour (n.) [MeSH]
Food, Nutrients[Hyper.]
flour (n.)
aliment en poudre (fr)[ClasseParExt.]
farina; wheat flour; meal; wheatmeal[ClasseHyper.]
(white), (fair; white), (fairness; white; whiteness)[Caract.]
food product, foodstuff - breakfast cereal, cereal, cereals, food grain, grain[Hyper.]
flour - flour - chalky, floury, mealy[Dérivé]
bread roll, bun, roll[Desc]
pastry - bread, breadstuff, staff of life - dough[Element]
flour (v.)
couvrir de poudre (fr)[Classe]
(farina; wheat flour; meal; wheatmeal)[termes liés]
flour[GenV+comp]
Wikipedia
Flour is a powder which is made by grinding cereal grains, other seeds or roots (like Cassava). It is the main ingredient of bread, which is a staple food for many cultures, making the availability of adequate supplies of flour a major economic and political issue at various times throughout history. Wheat flour is one of the most important foods in European, North American, Middle Eastern and North African cultures, and is the defining ingredient in most of their styles of breads and pastries. Maize flour has been important in Mesoamerican cuisine since ancient times, and remains a staple in much of Latin American cuisine.[citation needed] Rye flour is an important constituent of bread in much of central/northern Europe.
Contents |
The word "flour" is originally a variant of the word "flower". Both derive from the Old French fleur or flour, which had the literal meaning "blossom," and a figurative meaning "the finest." The phrase "fleur de farine" meant "the finest part of the meal," since flour resulted from the elimination of coarse and unwanted matter from the grain during milling.[1]
It was discovered around 9000 BC that wheat seeds could be crushed between simple millstones to make flour.[2] The Romans were the first to grind seeds on cone mills. In 1879, at the beginning of the Industrial Era, the first steam mill was erected in London.[3] In the 1930s, some flour began to be enriched with iron, niacin, thiamine and riboflavin. In the 1940s, mills started to enrich flour and folic acid was added to the list in the 1990s.
An important problem of the industrial revolution was the preservation of flour. Transportation distances and a relatively slow distribution system collided with natural shelf life. The reason for the limited shelf life is the fatty acids of the germ, which react from the moment they are exposed to oxygen. This occurs when grain is milled; the fatty acids oxidize and flour starts to become rancid. Depending on climate and grain quality, this process takes six to nine months. In the late 19th century, this process was too short for an industrial production and distribution cycle. As vitamins, micro nutrients and amino acids were completely or relatively unknown in the late 19th century, removing the germ was a brilliant solution. Without the germ, flour cannot become rancid. Degermed flour became standard. Degermation started in densely populated areas and took approximately one generation to reach the countryside. Heat-processed flour is flour where the germ is first separated from the endosperm and bran, then processed with steam, dry heat or microwave and blended into flour again.[4]
The FDA has been advised by several cookie dough manufacturers that they have implemented the use of heat-treated flour for their ready-to-bake cookie dough products" to reduce the risk of E. coli contamination.[5]
Milling of flour is accomplished by grinding grain between stones or steel wheels. Today, "stone-ground" usually means that the grain has been ground in a mill in which a revolving stone wheel turns over a stationary stone wheel, vertically or horizontally with the grain in between. Many small appliance mills are available, both hand-cranked and electric. The mill stones frequently rub against each other resulting in small stone particles chipping off and getting into flour, but they are removed before the flour is sold.
Rollermills soon replaced stone grist mills as the production of flour has historically driven technological development, as attempts to make gristmills more productive and less labor-intensive led to the watermill[6] and windmill. These terms are now applied more broadly to uses of water and wind power for purposes other than milling.[7] More recently, the Unifine mill, an impact-type mill, was developed in the mid-20th century.
Flour contains a high proportion of starches, which are a subset of complex carbohydrates also known as polysaccharides. The kinds of flour used in cooking include all-purpose flour, self-raising flour, and cake flour including bleached flour. The higher the protein content the harder and stronger the flour and will produce crusty or chewy breads. The lower the protein the softer the flour for better cakes, cookies, and pie crusts.[8]
Unbleached flour is simply flour that has not undergone bleaching and therefore does not have the color of "white" flour. An example of this would be the Graham flour. Sylvester Graham was against using bleaching agents, which he considered unhealthy.
"Refined flour" has had the germ and bran removed and is typically referred to as "white flour". "Bleached flour" is any refined flour with a whitening agent added.
Bleached flour is artificially aged using a bleaching agent, a maturing agent, or both. A bleaching agent would affect only the carotenoids in the flour; a maturing agent affects gluten development. A maturing agent may either strengthen or weaken gluten development.
The four most common additives used as bleaching/maturing agents in the USA at this time are:
Potassium bromate (will be listed as an ingredient/additive) - a maturing agent that strengthens gluten development. Does not bleach.
Benzoyl peroxide - bleaches. Does not act as a maturing agent - no effect on gluten
Ascorbic acid (Will be listed as an ingredient/additive, but seeing it in the ingredient list may not be an indication that the flour was matured using ascorbic acid but instead has had a small amount added as a dough enhancer) - Maturing agent that strengthens gluten development. Does not bleach.
Chlorine gas - both a bleaching agent and a maturing agent, but one that weakens gluten development. Chlorination also oxidizes starches in the flour, making it easier for the flour to absorb water and swell - this makes thicker batters and stiffer doughs. For bread, this is bad (because gluten is weakened and bread is heavily dependent on gluten formation), but for cakes, cookies, and biscuits, it's a good thing, because gluten development in these types of baked goods makes them tough. The modification of starches in the flour allows the use of wetter doughs (making for a moister end product) without destroying the structure necessary for light fluffy cakes and biscuits.[9] Chlorinated flour allows cakes and other baked goods to set faster, rise better, the fat to be distributed more evenly, with less vulnerability to collapse.
Cake flours in particular are nearly always chlorinated. There is at least one flour labeled "unbleached cake flour blend" (marketed by King Arthur) that is not bleached, but the protein content is much higher than typical cake flour at about 9.4% protein (cake flour is usually around 6% to 8%). According to King Arthur, this flour is a blend of a more finely milled unbleached wheat flour and cornstarch, which makes a better end result than unbleached wheat flour alone (cornstarch is a common additive for part of the flour used in cake where actual cake flour is called for but you only have all purpose on hand). However you will still get a denser end result than real cake flour that has been more finely milled, chlorinated, and has a lower protein content in the "cake flour" range of around 6% or so.
All bleaching and maturing agents (with the possible exception of ascorbic acid) have been banned in the EU,[10] making cake baking a difficult proposition as heat treated flours that mimic the effects of chlorination are to date available only to bulk bakeries. The home baker in the EU must struggle with the unbleached flours that typically do not lend themselves to the making of light fluffy cakes. At least one home baker has developed a method for heat treating flour at home to break down the starches and make it more acceptable for use in the making of cakes; this process is currently referred to as "Kate Flour" in Internet baking communities, after the woman who continues to develop the process.
Bromation of flour in the USA has fallen out of favor and while it is not yet actually banned anywhere, few retail flours available to the home baker are bromated anymore.
Many flours packaged specifically for commercial bakeries are still bromated. Retail bleached flours marketed to the home baker are now mostly either treated via peroxidation or chlorine gas. Current information from Pillsbury is that their bleached flours are treated both with benzoyl peroxide and chlorine gas. Gold Medal states that their bleached flour is either treated with benzoyl peroxide OR it's treated with chlorine gas, but there is no way to tell which process has been used when you buy the flour at the grocery store.
Some other chemicals used as Flour treatment agents to modify color and baking properties include:
Flour that does not have a leavening agent is called plain or all-purpose flour. It is appropriate for most bread and pizza bases. Some cookies are also prepared using this type of flour. Bread flour is high in gluten protein, with 12.5-14% protein compared to 10-12% protein in all-purpose flour. The increased protein binds to the flour to entrap carbon dioxide released by the yeast fermentation process, resulting in a stronger rise.
Leavening agents are used with some flours,[11] especially those with significant gluten content, to produce lighter and softer baked products by embedding small gas bubbles. Self-rising (or self-raising) flour is sold premixed with chemical leavening agents. The added ingredients are evenly distributed throughout the flour which aids a consistent rise in baked goods. This flour is generally used for preparing scones, biscuits, muffins, etc. It was invented by Henry Jones and patented in 1845. Plain flour can be used to make a type of self-rising flour although the flour will be coarser. Self-rising flour is typically composed of the following ratio:
During the process of making flour nutrients are lost. Some of these nutrients are replaced during refining and the result is "enriched flour".
More wheat flour is produced than any other flour. Wheat varieties are called "clean," "white," or "brown" or "strong" or "hard" if they have high gluten content, and they are called "soft" or "weak" flour if gluten content is low.
Flour can also be made from soy beans, peanuts, arrowroot, taro, cattails, acorns, quinoa and other non-cereal foodstuffs.
In some markets, the different available flour varieties are labeled according to the ash mass ("mineral content") that remains after a sample is incinerated in a laboratory oven (typically at 550 °C or 900 °C, see international standards ISO 2171 and ICC 104/1). This is an easily verified indicator for the fraction of the whole grain remains in the flour, because the mineral content of the starchy endosperm is much lower than that of the outer parts of the grain. Flour made from all parts of the grain (extraction rate: 100%) leaves about 2 g ash or more per 100 g dry flour. Plain white flour (extraction rate: 50–60%) leaves only about 0.4 g.
In the United States and the United Kingdom, no numbered standardized flour types are defined, and the ash mass is only rarely given on the label by flour manufacturers. However, the legally required standard nutrition label specifies the protein content of the flour, which is also a way for comparing the extraction rates of different available flour types.
In general, as the extraction rate of the flour increases, so do both the protein and the ash content. However, as the extraction rate approaches 100% (whole meal), the protein content drops slightly, while the ash content continues to rise.
The following table shows some typical examples of how protein and ash content relate to each other in wheat flour:
Ash | Protein | Wheat flour type | ||||
---|---|---|---|---|---|---|
US | German | French | Italian | Czech | ||
~0.4% | ~9% | pastry flour | 405 | 40 | 00 | Hladká mouka výběrová 00 |
~0.55% | ~11% | all-purpose flour | 550 | 55 | 0 | Hladká mouka |
~0.8% | ~14% | high gluten flour | 812 | 80 | 1 | Polohrubá mouka |
~1% | ~15% | first clear flour | 1050 | 110 | 2 | Hrubá mouka |
>1.5% | ~13% | white whole wheat | 1600 | 150 | Farina integrale di grano tenero | Pšeničná Krupice |
This table is only a rough guideline for converting bread recipes. Since flour types are not standardized in many countries, the numbers may differ between manufacturers. Note that there is no Type 40 French flour. The closest is Type 45.
It is possible to determine ash content from some US manufacturers. However, US measurements are based on wheat with a 14% moisture content. Thus, a US flour with 0.48% ash would approximate a French Type 55. For US bakers of French pastry seeking an equivalent, for example, they could look at tables published by King Arthur Flour, showing their all-purpose flour is a close equivalent to French Type 55.
Other measurable properties of flour as used in baking can be determined using a variety of specialized instruments, such as the Farinograph.
Flour dust suspended in air is explosive -- as is any mixture of a finely powdered flammable substance with air[18] (see flour bomb). Some devastating and fatal explosions have occurred at flour mills, including an explosion in 1878 at the Washburn "A" Mill in Minneapolis, the largest flour mill in the United States at the time.[19]
Bread, pasta, crackers, many cakes, and many other foods are made using flour. Wheat flour is also used to make a roux as a base for gravy and sauces. It is also the base for papier-mâché.
Cornstarch is a principal ingredient of many puddings or desserts.
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Look up flour in Wiktionary, the free dictionary. |
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