|
Gluten Digestion
Gluten is a structural protein naturally found in certain cereal grains. Although "gluten" often only refers to wheat proteins, in medical literature it refers to the combination of prolamin and glutelin proteins naturally occurring in all grains that have been proved capable of triggering Coeliac disease, celiac disease. These include any species of wheat (such as common wheat, durum, spelt, Khorasan wheat, khorasan, emmer and Einkorn wheat, einkorn), barley, rye and some oat cultivars, as well as any cross hybrids of these grains (such as triticale). Gluten makes up 75–85% of the total protein in Common wheat, bread wheat. Glutens, especially Triticeae glutens, have unique viscoelasticity, viscoelastic and Adhesion, adhesive properties, which give dough its elasticity, helping it Proofing (baking technique), rise and keep its shape and often leaving the final product with a chewy texture. These properties, and its relatively low cost, make gluten valuable to both Food industr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gluten Sources
Gluten is a structural protein naturally found in certain cereal grains. Although "gluten" often only refers to wheat proteins, in medical literature it refers to the combination of prolamin and glutelin proteins naturally occurring in all grains that have been proved capable of triggering Coeliac disease, celiac disease. These include any species of wheat (such as common wheat, durum, spelt, Khorasan wheat, khorasan, emmer and Einkorn wheat, einkorn), barley, rye and some oat cultivars, as well as any cross hybrids of these grains (such as triticale). Gluten makes up 75–85% of the total protein in Common wheat, bread wheat. Glutens, especially Triticeae glutens, have unique viscoelasticity, viscoelastic and Adhesion, adhesive properties, which give dough its elasticity, helping it Proofing (baking technique), rise and keep its shape and often leaving the final product with a chewy texture. These properties, and its relatively low cost, make gluten valuable to both Food industr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triticeae Glutens
Gluten is the seed storage protein in mature wheat seeds (and in the seeds of closely related species). It is the sticky substance in bread wheat which allows dough to rise and retain its shape during baking. The same, or very similar, proteins are also found in related grasses within the Tribe (biology), tribe Triticeae. Seed glutens of some non-Triticeae plants have similar properties, but none can perform on a par with those of the Triticeae taxa, particularly the ''Triticum'' species (bread wheat, durum wheat, etc.). What distinguishes bread wheat from these other grass seeds is the quantity of these proteins and the level of subcomponents, with bread wheat having the highest protein content and a complex mixture of proteins derived from three grass species (''Aegilops speltoides'', ''Aegilops tauschii strangulata'', and ''einkorn wheat, Triticum monococcum''). Triticeae seed proteins fall into four groups: * albumins – soluble in hypotonic solutions and are coagulated by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rice
Rice is the seed of the grass species ''Oryza sativa'' (Asian rice) or less commonly ''Oryza glaberrima ''Oryza glaberrima'', commonly known as African rice, is one of the two domesticated rice species. It was first domesticated and grown in West Africa around 3,000 years ago. In agriculture, it has largely been replaced by higher-yielding Asian r ...'' (African rice). The name wild rice is usually used for species of the genera ''Zizania (genus), Zizania'' and ''Porteresia'', both wild and domesticated, although the term may also be used for primitive or uncultivated varieties of ''Oryza''. As a cereal, cereal grain, domesticated rice is the most widely consumed staple food for over half of the world's World population, human population,Abstract, "Rice feeds more than half the world's population." especially in Asia and Africa. It is the agricultural commodity with the third-highest worldwide production, after sugarcane and maize. Since sizable portions of sugarcane and ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeins
Zein is a class of prolamine protein found in maize (corn). It is usually manufactured as a powder from corn gluten meal. Zein is one of the best understood plant proteins.Momany, Frank A.; Sessa, David J.; Lawton, John C.; Selling, Gordon W.; Hamaker, Sharon A. H.; and Willett, Julious L.Structural Characterization of A-Zein December 27, 2005, American Chemical Society Pure zein is clear, odorless, tasteless, hard, water-insoluble, and edible, and it has a variety of industrial and food uses.Lawton, John W.Zein: A History of Processing and Use, November 1, 2002, American Association of Cereal Chemists Commercial uses Historically, zein has been used in the manufacture of a wide variety of commercial products, including coatings for paper cups, soda bottle cap linings, clothing fabric,Commission on Life SciencesBiobased Industrial Products: Research and Commercialization Priorities 2002. buttons, adhesives, coatings and binders. The dominant historical use of zein was in the text ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maize
Maize ( ; ''Zea mays'' subsp. ''mays'', from es, maíz after tnq, mahiz), also known as corn (North American and Australian English), is a cereal grain first domesticated by indigenous peoples in southern Mexico about 10,000 years ago. The leafy stalk of the plant produces pollen inflorescences (or "tassels") and separate ovuliferous inflorescences called ears that when fertilized yield kernels or seeds, which are fruits. The term ''maize'' is preferred in formal, scientific, and international usage as a common name because it refers specifically to this one grain, unlike ''corn'', which has a complex variety of meanings that vary by context and geographic region. Maize has become a staple food in many parts of the world, with the total production of maize surpassing that of wheat or rice. In addition to being consumed directly by humans (often in the form of masa), maize is also used for corn ethanol, animal feed and other maize products, such as corn starch and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avenin
The oat (''Avena sativa''), sometimes called the common oat, is a species of cereal grain grown for its seed, which is known by the same name (usually in the plural, unlike other cereals and pseudocereals). While oats are suitable for human consumption as oatmeal and rolled oats, one of the most common uses is as livestock feed. Oats are a nutrient-rich food associated with lower blood cholesterol when consumed regularly. Avenins are oat gluten proteins, similar to gliadin in wheat. They can trigger celiac disease in a small proportion of people. Also, oat products are frequently contaminated by other gluten-containing grains, mainly wheat and barley. Origin The wild ancestor of ''Avena sativa'' and the closely related minor crop '' A. byzantina'' is '' A. sterilis''. ''A. sterilis'' is a wild oat that is naturally hexaploid. Genetic evidence shows the ancestral forms of ''A. sterilis'' grew in the Fertile Crescent of the Near East. Oats are usually thought to have emerged a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secalin
Secalin is a prolamin glycoprotein found in the grain rye, ''Secale cereale''. Secalin is one of the forms of gluten proteins that people with coeliac disease cannot tolerate, and thus rye should be avoided by people with this disease. It is generally recommended that such people follow a gluten free diet. In bread making with rye flour, this protein requires exposure to an acid such as lactic acid to make the bread rise. This is usually achieved with a sourdough ferment Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes. In biochemistry, it is narrowly defined as the extraction of energy from carbohydrates in the absence of oxygen. In food .... References S S Glycoproteins Rye {{Biochemistry-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hordein
Hordein is a prolamin glycoprotein, present in barley and some other cereals, together with gliadin and other glycoproteins (such as glutelins) coming under the general name of gluten. Horedeins are found in the endosperm where one of their functions is to act as a storage unit. In comparison to other proteins, horedeins are less soluble when compared to proteins such as albumin and globulins. In relation to amino acids, horedeins have a substantial amount of proline and glutamine but lack charged amino acids such as lysine. Some people are sensitive to hordein due to disorders such as celiac disease or gluten intolerance. Along with gliadin (the prolamin gluten found in wheat), hordein is present in many foods and also may be found in beer. Hordein is usually the main problem for coeliacs wishing to drink beer. Coeliacs are able to find specialist breads that are low in hordein, gliadin and other problematic glycoproteins, just as they can find gluten free beer Gluten-free b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gliadin
Gliadin (a type of prolamin) is a class of proteins present in wheat and several other cereals within the grass genus ''Triticum''. Gliadins, which are a component of gluten, are essential for giving bread the ability to rise properly during baking. Gliadins and glutenins are the two main components of the gluten fraction of the wheat seed. This gluten is found in products such as wheat flour. Gluten is split about evenly between the gliadins and glutenins, although there are variations found in different sources. Both gliadins and glutenins are not water-soluble, but gliadins are soluble in 70% aqueous ethanol. There are three main types of gliadin (α, γ, and ω), to which the body is intolerant in coeliac (or celiac) disease. Diagnosis of this disease has recently been improving. Gliadin can cross the intestinal epithelium. Breast milk of healthy human mothers who eat gluten-containing foods presents high levels of non-degraded gliadin. Types The α, γ, and ω gliadin t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glutenin
Glutenin (a type of glutelin) is a major protein within wheat flour, making up 47% of the total protein content. The glutenins are protein aggregates of high-molecular-mass (HMW) and low-molecular-mass (LMW) subunits with molar masses from about 200,000 to a few million, which are stabilized by intermolecular disulfide bonds, hydrophobic interactions and other forces. Glutenin is responsible for the strength and elasticity of dough. Wheat gluten proteins consist of two major fractions: the gliadins and the glutenins. Gliadins are monomeric proteins, which can be separated into four groups: alpha-, beta-, gamma- and omega-gliadins. They are structurally similar to LMW glutenins. Glutenins occur as multimer In chemistry and biochemistry, an oligomer () is a molecule that consists of a few repeating units which could be derived, actually or conceptually, from smaller molecules, monomers.Quote: ''Oligomer molecule: A molecule of intermediate relat ...ic aggregates of high-mole ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Food Industry
The food industry is a complex, global network of diverse businesses that supplies most of the food consumed by the world's population. The food industry today has become highly diversified, with manufacturing ranging from small, traditional, family-run activities that are highly labor-intensive, to large, capital-intensive and highly mechanized industrial processes. Many food industries depend almost entirely on local agriculture, produce, or fishing. It is challenging to find an inclusive way to cover all aspects of food production and sale. The UK Food Standards Agency describes it as "the whole food industry – from farming and food production, packaging and distribution, to retail and catering." The Economic Research Service of the USDA uses the term ''food system'' to describe the same thing, stating: "The U.S. food system is a complex network of farmers and the industries that link to them. Those links include makers of farm equipment and chemicals as well as firms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proofing (baking Technique)
In cooking, proofing (also called proving) is a step in the preparation of yeast bread and other baked goods in which the dough is allowed to rest and rise a final time before baking. During this rest period, yeast Fermentation in food processing, ferments the dough and produces gases, thereby Leavening agent, leavening the dough. In contrast, proofing or blooming ''yeast'' (as opposed to proofing the dough) may refer to the process of first suspending yeast in warm water, a necessary hydration step when baking with baker's yeast#Types of baker's yeast, active dry yeast.Instant dry yeast may be placed directly into flour without hydrating first. Proofing can also refer to the process of testing the viability of dry yeast by suspending it in warm water with carbohydrates (sugars). If the yeast is still alive, it will feed on the sugar and produce a visible layer of foam on the surface of the water mixture. Fermentation rest periods are not always explicitly named, and can appear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
