Malt

Malted grains have probably been used as an ingredient of beer since ancient times, for example, in Egypt (Ancient Egyptian cuisine), Sumer, and China. In Persian countries, a sweet paste made entirely from germinated wheat is called samanū () in Iran, samanak () in Afghanistan, (); () or sümölök (), which is prepared for Nowruz (Persian new year celebration) in a large pot (like a kazan). A plate or bowl of samanu is a traditional component of the Haft sin table symbolising affluence. Traditionally, women have a special party to prepare it during the night, and cook it from late in the evening until daylight, singing related songs. In Tajikistan and Afghanistan, they sing: Samanak dar Jūsh u mā Kafcha zanēm – Dīgarān dar Khwāb u mā Dafcha zanēm (meaning: "Samanak is boiling and we are stirring it, others are asleep and we are playing daf"). In modern times, making samanu can be a family gathering. It originally comes from the Great Persian Empire. Mämmi, or Easter Porridge, is a traditional Finnish Lenten food. Cooked from rye malt and flour, mämmi has a great resemblance (in the recipe, color, and taste) to samanū. Today, this product is available in shops from February until Easter. A (nonrepresentative) survey in 2013 showed that almost no one cooks mämmi at home in modern-day Finland. ==Malting==

Malting is the process of converting barley or other cereal grains into malt for use in brewing, distilling, or foods, and takes place in a maltings, sometimes called a malthouse, or a malting floor. The cereal is spread out on the malting floor in a layer of depth. ;Drying :The malting process starts with drying the grains to a moisture content below 14% and then storing for around six weeks to overcome seed dormancy. ;Steeping :When ready, the grain is immersed or steeped in water two or three times for two or three days to allow the grain to absorb moisture and to start to sprout. ;Germination :When the grain has a moisture content of around 46%, it is transferred to the malting or germination floor, where it is constantly turned over for about four to six days while it is air-dried. ;Pre-toasting :The grain at this point, called "green malt", is then dried and toasted in an oven (or kiln) to the desired color and specification. Malts range in color from very pale through crystal and amber to chocolate or black malts. ;Smoking :The sprouted grain is then further dried and smoked by spreading it on a perforated wooden floor. Smoke coming from an oasting fireplace (via smoke channels) is then used to heat the wooden floor and the sprouted grains. The temperature is usually around . A "maltings" is typically a long, single-storey building with a floor that slopes slightly from one end of the building to the other. Floor maltings began to be phased out in the 1940s in favor of "pneumatic plants", where large industrial fans are used to blow air through the germinating grain beds and to pass hot air through the malt being kilned. Like floor maltings, these pneumatic plants use batch processes, but of considerably greater size, typically 100-ton batches compared with 20-ton batches floor maltings. , the largest malting operation in the world was Malteurop, which operates in 14 countries. ==Production==

Barley is the most commonly malted grain, in part because of its high content of enzymes, though wheat, rye, oats, rice, and corn are also used. Also very important is the retention of the grain's husk, even after threshing, unlike the bare seeds of threshed wheat or rye. This protects the growing acrospire (developing plant embryo) from damage during malting, which can easily lead to mold growth; it also allows the mash of converted grain to create a filter bed during lautering. ==Malts==

Diastatic and nondiastatic As all grains sprout, natural enzymes within the grain break down the starch of which the grain is composed into simpler sugars, which taste sweet and are easier for yeast to use as food. Malt with active enzymes is called "diastatic malt". Malt with inactive enzymes is called "nondiastatic malt". The enzymes are deactivated by heating the malt. Base and specialty Malt is often divided into two categories by brewers: base malts and specialty malts. Base malts have enough diastatic power to convert their own starch and usually, that of some amount of starch from unmalted grain, called adjuncts. Specialty malts have little diastatic power, but provide flavor, color, or "body" (viscosity) to the finished beer. Specialty caramel or crystal malts have been subjected to heat treatment to convert their starches to sugars nonenzymatically. Within these categories is a variety of types distinguished largely by the kilning temperature. Two-row and six-row In addition, barley malts are distinguished by the two major cultivar types of barley used for malting, two-row, and six-row. ==Malt extract==

malt extracts: liquid (left) and spray-dried (right) (LME) being added to flour in a bagel recipe Malt extract, also known as extract of malt, is a sweet, treacle-like substance used as a dietary supplement. It was popular in the first half of the 20th century as a nutritional enhancer for the children of the British urban working class, whose diet was often deficient in vitamins and minerals. Children were given cod liver oil for the same reason, but it proved so unpalatable that it was combined with extract of malt to produce "Malt and Cod-Liver Oil." The 1907 British Pharmaceutical Codexs instructions for making a nutritional extract of malt do not include a mashout at the end of extraction and include the use of lower mash temperatures than is typical with modern beer-brewing practices. The Codex indicates that diastatic activity is to be preserved by the use of temperatures not exceeding . Malt extract production Malt extract is frequently used in the brewing of beer. Its production begins by germinating barley grain in a process known as malting, which consists of immersing the barley in water to encourage it to sprout, then drying it to halt the progress when the sprouting begins. The drying step stops the sprouting, but the enzymes remain active due to the low temperatures used in base malt production. In one before-and-after comparison, malting decreased barley's extractable starch content by about 7% on a dry matter basis and turned that portion into various other carbohydrates. In the next step, brewers use a process called mashing to extract the sugars. Brewers warm cracked malt in temperature-modulated water, activating the enzymes, which cleave more of the malt's remaining starch into various sugars, the largest percentage of which is maltose. LME is also sold in jars as a consumer product. ==Research==

Scientists aim to discover what happens inside barley grains as they become malted to help plant breeders produce better malting barley for food and beverage products. The United States Agricultural Research Service scientists are interested in specialized enzymes called serine-class proteases that digest beta-amylases, which convert carbohydrates into "simple sugars" during the sprouting process. The enzyme also breaks down stored proteins into their amino-acid derivatives. The balance of proteins and carbohydrates broken down by the enzyme affects the malt's flavor. Enzyme-rich malt extract Enzyme-rich malt extract (ERME) is a specialised form of barley malt extract (marketed by Ateria Health), that has undergone preparation to activate the natural amylase and glucanase enzymes in the grain. Initially researched as an equine food supplement, pilot studies using ERME as a human food supplement have suggested that it could potentially improve the symptoms of Irritable Bowel Syndrome (IBS) and chronic constipation, due to the way it can break down carbohydrates in the small intestine that IBS has been found to hinder. However further research is ongoing to fully prove this link. ==See also==