grain

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Related to Grain boundary: Grain growth, Twin boundary

grain

 [grān]
1. a seed, especially of a cereal plant.
2. the smallest unit in the apothecaries' and avoirdupois systems, equal to 0.065 of a gram; abbreviated gr.

grain

(grān),
1. One of the cereal plants, or its seed.
2. A hard, minute particle of any substance, for example, sand.
3. A unit of weight equivalent to 0.064799 grain [For other equivalents, see appendix, Weights and Measures].
4. A macroscopically visible cluster of organisms living in tissue of patients with actinomycosis or mycetoma.
5. A particle of a silver halide in a photographic emulsion.
[L. granum]

grain (gr)

Etymology: L, granum, seed
the smallest unit of mass in avoirdupois, troy, and apothecaries' weights formerly based on the weight of a plump grain of wheat. The grain is the same and is equal to 65 mg. The troy and apothecaries' ounces contain 480 grains; the avoirdupois ounce contains 437.5 grains.

grain

(1) An obsolete, non-SI (International System) unit of weight formerly used by pharmacists, equal to 0.0648 g. 
(2) A nonspecific term for any granule particle (e.g., a psammoma body), seen by light microscopy; the term is no longer used in pathology.
(3) A cereal plant—e.g., barley, oat, wheat—or seed thereof.

grain

(gr) (grān)
1. Cereal plants (e.g., corn, wheat, or rye), or a seed of one of them.
2. A minute, hard particle of any substance, as of sand.
3. A unit of weight, 1/60 dram (apoth. or troy), 1/437.5 avoirdupois ounce, 1/480 troy ounce, 1/5760 troy pound, 1/7000 avoirdupois pound; the equivalent of 0.064799 gram.
[L. granum]

grain

(gr) (grān)
1. One of the cereal plants, or its seed.
2. A hard, minute particle of any substance, e.g., sand.
3. The grain is obsolete as a unit in dentistry, medicine, pharmacy, and nursing. Avoid abbreviationgr, which is subject to frequent misinterpretation. A unit of weight equivalent to 64.79 mg.
4. A particle of a silver halide in a photographic emulsion.
[L. granum]

grain (gr),

n 1. a unit of weight equal to 0.0648 g.
n 2. a crystal of an alloy.
grain boundary,
n the junction of two grains growing from different nuclei, impinging and causing discontinuity of the lattice structure. Important in corrosion and brittleness of metals.
grain growth,

grain

1. a seed, especially of a cereal plant; for best results in feeding the seed may be rolled, cracked, flaked (below).
2. the twentieth part of a scruple: 0.065 g; abbreviated gr. See also Table 4.2.
3. the texture and patterned appearance of the outside of leather.
4. the size and nature of the crystals of the fluorescent salt used in intensifying screens and also the size and nature of silver halide crystals used in photographic emulsion.

grain engorgement
flaked grain
grain that has been cooked and then rolled flat. The digestibility is greatly enhanced but the process is costly.
grain fumigants
substances used to fumigate silos full of grain to kill insect pests. Use of these agents other than as recommended by the makers may lead to poisoning. See also methyl bromide.
high-moisture grain
see moist grain storage.
grain itch mites
micronized grain
heated in a dry heat then rolled.
grain overload
popped grain
grain passed across a heated plate and popped like popcorn.
grain rash
grain itch mite dermatitis.
roasted grain
roasted in dry heat but not popped.
grain screenings
debris from a grain batch that is removed by passing it over a screen. Has some feeding value but this varies with the mix of contents.
grain sorghum
Sorghum bicolor (S. vulgare).
spent grain
grain used in brewing or liquor production that has been exhausted of its carbohydrate; includes brewer's grains, distiller's grains.
sprouted grain

Patient discussion about grain

Q. What and how much intake should I have 1. Vegetables, 2. Fruits and whole grain… I am 21 years old and would like to know that in order to get the required fiber per day what and how much intake should I have 1. Vegetables, 2. Fruits and whole grain…

A. actually men under 50 should have 38 grams a day of fiber. here is a nice article about fiber consuming and a list of foods that contain fiber and the amount of it:
http://www.mayoclinic.com/print/fiber/NU00033/METHOD=print

More discussions about grain
References in periodicals archive ?
Machinability: The presence of grain boundary carbides/pearlite increases tool wear.
Compared to the conventional preparation of the nanocomposite thermoelectric materials, the salient advantage of this "coating" technique is that one is able to achieve a more homogenous dispersion of the nanostructures, which should subsequently result in more desirable effects on both the thermal and electrical transports via the direct control of the grain boundary.
The ratio between these two surface densities is an expression of the texture complexity and grain boundary irregularity: values close to unity belong to the simplest intergrowth, while the higher values indicate the existence of complex texture.
Wen S,Yan D, Grain boundary in some nanomaterials, Ceramic Inter, 21,109-112,(1995)
Geometrical models for grain, grain boundary and grain edge average curvature in an Al-1 mass%Mn alloy.
Unit Quartz: Unit quartz grains are identified by their single grain boundary and unit extiction.
The explanation is connected with the fact that microstructure damages may begin at the grain boundary between ferrite and austenite, respectively austenite and martensite needles.
Optical microscopy observations revealed that for nano-size Pb-free SAC, the grain size and width of the grain boundary decreased.
When excessive carbides are in the grain boundary, the casting will not have as much strength and is much more likely to break.
The National Institute for Material Science team focused on the grain boundary of steel and made adjustments so that vanadium nitride, a material which retains stability even under high temperature, would act as shields to prevent grains from changing shape.
The energy surely depends only on the fit of atoms at the twin interface or grain boundary.
The chip is formed first by grain boundary distortion in front and below the shear plane, followed by grain boundary dislocation.