
	Where results make sense

Topic: Recrystallization

In the News (Sat 26 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Laboratory Help! Recrystillization of organic compounds
		Recrystallization is an often-used method for purifying solids.
		Recrystallization works by taking advantage of the different solubility properties of compounds, and allows impurities to be removed from crude solids.
		When choosing a solvent for recrystallization, the impure compound should have poor solubility in the solvent at low temperatures but be completely soluble at high temperatures.
	www.chemhelper.com /recryst.html (260 words)

	Recrystallization of Mica in Crenulated Schists
		I was essentially concerned with the mechanics of growth of isolated matrix mica flakes under conditions involving annealing recrystallization, and not with the mechanism of chemical transport involved in chemical differentiation, which will be attempted elsewhere.
		My point, however, that in mimetic recrystallization mica flakes grow so as to become stain-free is amply illustrated by Dr. Nicholson's photographs.
		My other point that at a subsequent stage of recrystallization mica flakes grow parallel to axial planes of folds is again shown by Dr. Nicholson's Fig.
	www.nature.com /nature/journal/v210/n5037/abs/210727a0.html (152 words)

	Recrystallization
		In recrystallization, a solution is created by dissolving a solute in a solvent at or near its boiling point.
		There are five major steps in the recrystallization process: dissolving the solute in the solvent, performing a gravity filtration, if necessary, obtaining crystals of the solute, collecting the solute crystals by vacuum filtration, and, finally, drying the resulting crystals.
		A funnel with a stem is prone to premature recrystallization inside the stem because the filtrate can cool as it passes through the stem.
	wulfenite.fandm.edu /labtech/recryst.htm (1088 words)

	annealingstages
		Recrystallization takes place by a combination of nucleation of strain free grains and the growth of these nuclei to absorb the entire cold worked material.
		The term recrystallization temperature does not refer to a definite temperature below which recrystallization will not occur, but refers to the approximate temperature at which a highly cold worked material completely recrystallizes in one hour.
		During recrystallization stage, there is a significant drop in tensile strength, hardness and a large increase in the ductility of the material (See Figure 1).
	info.lu.farmingdale.edu /depts/met/met205/annealingstages.html (607 words)

	Recrystallization
		The solubility of the compound in the solvent used for recrystallization is important.
		The color remaining after recrystallization is due primarily to impurity on the surface of the crystals.
		For each recrystallization the following should be included in your report: exact amount of crude starting material, identify the solvent and amount used, the yield of pure material recovered, the melting point of the impure and pure material.
	www.chem.arizona.edu /courses/chem243/recrystallization.html (1299 words)

	Effects of diagenetic recrystallization on 18O/16O values of deep-sea sediments
		Here I show that recrystallization must not be neglected: with reasonable assumptions it can account for much of the familiar Cenozoic trend in the oxygen isotopic composition of foraminifera.
		indicate that there may be considerable recrystallization of Tertiary carbonates with very significant effects on isotopic compositions.
		suggests that there could be total recrystallization in sediments deposited as recently as the early Tertiary.
	www.nature.com /nature/journal/v301/n5901/abs/301594a0.html (290 words)

	Untitled Document
		Recrystallization is a microstructural transformation which occurs in crystalline materials, and is a particularly important feature of the "thermomechanical processing" of metals.
		When a metal is deformed, defects are created, which make the material intrinsically unstable.
		On heating the metal to a sufficiently high temperature, the process of recrystallization removes most of the defects by creating a new arrangement of crystals or grains.
	www.recrystallization.info (87 words)

	Effect of Sweetener, Stabilizer, and Storage Temperature on Ice Recrystallization in Ice Cream -- Hagiwara and Hartel ...
		ice recrystallization in ice cream at three storage temperatures.
		Recrystallization rate did not depend uniformly on the
		recrystallization, but some samples showed greater effects than
	jds.fass.org /cgi/content/abstract/79/5/735 (308 words)

Try your search on: Qwika (all wikis)