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Fructose, or levulose, is the form of sugar found in fruit and honey. It is a laevorotatory monosaccharide with the same empirical formula as glucose but with a different structure. Although fructose is a hexose (6 carbon atoms), it generally exists as a 5-membered hemiketal ring (a furanose).
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www.worldofmolecules.com/foods/fructose.htm
www.worldofmolecules.com/foods/fructose.htm
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Fructose 3D Molecular Structure ... To Rotate Molecule -->>; Left Click and Drag ... To view in Chime -- PDB Structure of the extended fructose molecule...
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www.worldofmolecules.com/3D/fructose_3d.htm
www.worldofmolecules.com/3D/fructose_3d.htm
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Another monosaccharide that is of particular importance is fructose. It can be derived from glucose by rearranging the top portion of the molecule to be a ketose instead of an aldose. It's at least a two-step process in which hydrogens are moved up the C#1 and electrons are rearranged to form a new double bond.
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dl.clackamas.edu/ch106-07/fructose.htm
dl.clackamas.edu/ch106-07/fructose.htm
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Fructose is fruit sugar. In the limited quantities of fruit we recommend for our patients (see Page Fundamental Food Plan II), fructose is rarely a problem. ... Humans have a limited ability to metabolize fructose (fruit sugar). Fructose is metabolized differently from other sugars. A fructose load leads to accumulation...
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www.drkaslow.com/html/fructose.html
www.drkaslow.com/html/fructose.html
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Scientists found that the rats given fructose had more undesirable cross-linking changes in the collagen of their skin than in the other groups. These changes are also thought to be markers for aging. The scientists say that it is the fructose molecule in the sucrose, not the glucose, that plays the larger part.20...
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www.westonaprice.org/modernfood/highfructose.html
www.westonaprice.org/modernfood/highfructose.html
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There are over 35 years of HARD empirical evidence of refined man-made fructose metabolizing to triglycerides and adipose tissue, UNLIKE the fructose molecule linked to a glucose molecule, found in sucrose (cane or beet), which is converted to blood glucose.
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articles.mercola.com/sites/articles/archive/2006/07/22/...
articles.mercola.com/sites/articles/archive/2006/07/22/debate-about-dangers-of-high-fructose-corn-syrup.aspx
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Learn how the so-called "safe sweetener" is anything but that, as new evidence shows many dangers from excessive Fructose ingestion. ... These changes are also thought to be markers for aging. The scientists say that it is the fructose molecule in the sucrose, not the glucose, which plays the larger problem.
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articles.mercola.com/sites/articles/archive/2002/01/05/...
articles.mercola.com/sites/articles/archive/2002/01/05/fructose-part-two.aspx
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4. Compare the structural formula of glucose to fructose: ... 1. Cut out a model of one glucose and one fructose molecule. Attempt to join the two molecules like puzzle pieces. Do the glucose and fructose molecules fit together? YES or NO...
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www.usask.ca/education/coursework/mcvittiej/bio30unit1/...
www.usask.ca/education/coursework/mcvittiej/bio30unit1/handouts/carbo.htm
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Consumers express surprise at finding it unexpectedly on product labels without realizing that this occurs largely because of the unique functionality of the free fructose molecule.
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jn.nutrition.org/cgi/content/full/139/6/1219S
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