fructose


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Related to fructose: Fructose intolerance, High fructose corn syrup

fructose

(frŭk`tōs),

levulose

(lĕv`yəlōs'), or

fruit sugar,

simple sugar found in honey and in the fruit and other parts of plants. It is much sweeter than sucrosesucrose
, commonest of the sugars, a white, crystalline solid disaccharide (see carbohydrate) with a sweet taste, melting and decomposing at 186°C; to form caramel. It is known commonly as cane sugar, beet sugar, or maple sugar, depending upon its natural source.
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 (cane sugar). It is best obtained by hydrolysis of inulin, a polysaccharide found in dahlia bulbs and the Jerusalem artichoke. Chemically it is a monosaccharide (see carbohydratecarbohydrate,
any member of a large class of chemical compounds that includes sugars, starches, cellulose, and related compounds. These compounds are produced naturally by green plants from carbon dioxide and water (see photosynthesis).
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) with the empirical formula C6H12O6. It has the same formula as glucose but differs from it in structure (see isomerisomer
, in chemistry, one of two or more compounds having the same molecular formula but different structures (arrangements of atoms in the molecule). Isomerism is the occurrence of such compounds. Isomerism was first recognized by J. J. Berzelius in 1827.
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). It is often found with glucose in nature. Glucose and fructose are formed in equal amounts when sucrose is hydrolyzed by the enzyme invertase or by heating with dilute acid; the resulting equimolar mixture of fructose and glucose, called invert sugar, is the major component of honey. Fructose reacts with Fehling's solutionFehling's solution
, deep-blue, alkaline solution used to test for the presence of aldehydes (e.g., formaldehyde, HCHO) or other compounds that contain the aldehyde functional group, -CHO.
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 and can be differentiated from glucose by its reaction with lime water to form a water-insoluble precipitate, calcium fructosate. In solution, fructose exists as a ring compound in equilibrium with a straight-chain form.

Fructose

A sugar that is the commonest of ketoses and the sweetest of the sugars. It is also known as d -fructose, d -fructopyranose, and levulose fruit sugar. It is found in free state, usually accompanied by d -glucose and sucrose in fruit juices, honey, and nectar of plant glands. d -Fructose is the principal sugar in seminal fluid. See Carbohydrate

Fructose is readily utilized by diabetic animals. In persons with diabetes mellitus or parenchymal hepatic disease, the impairment of fructose tolerance is relatively small and not at all comparable to the diminution in their tolerance to glucose. See Monosaccharide

Fructose

 

(fruit sugar, levulose, (β-D-fructose), a colorless crystalline substance, with a sweet taste (1.5 times sweeter than saccharose and three times sweeter than glucose) and a melting point of 102°–104°C.

Fructose is soluble in water. A monosaccharide, it occurs naturally in many fruits and vegetables, such as apples and tomatoes, and in honey (approximately 50 percent) and is a constituent of oligosaccharides and polysaccharides. The phosphates of fructose, such as fructose-l,6-diphosphate and fructose-6-phosphate, are intermediate compounds in the dark phase of photosynthesis (Calvin cycle), in major metabolic processes (glycolysis, alcoholic fermentation), and in the biosynthesis of carbohydrates.

Fructose is a valuable food product and is easily assimilated by the organism. It is obtained from fruits by the hydrolysis of saccharose and inulin, as well as by the action of alkalies on D-glucose. In addition to the furanose (natural) form, the open ketone form and other tautomeric forms of fructose are known. Fructose is used in the food-processing industry and in medicine. Fructose-1,6-diphosphate is a drug administered to persons suffering from shock or various heart conditions.

fructose

[′fru̇k‚tōs]
(biochemistry)
C6H12O5 The commonest of ketoses and the sweetest of sugars, found in the free state in fruit juices, honey, and nectar of plant glands. Also known asD-fructopyranose.

fructose

a white crystalline water-soluble sugar occurring in honey and many fruits. Formula: C6H12O6
References in periodicals archive ?
The preliminary findings of this study help educate the public on the effects of restricting fructose in your diet," said Dr.
In other words, it is possible to say, as some do, that fructose may promote obesity and diabetes by overstimulating a hormone that helps to regulate fat accumulation.
The findings also suggested that the ingredients on some product labels do not represent their fructose content, for example, the label on Pepsi Throwback indicates it is made with real sugar (sucrose) yet the analysis demonstrated that it contains more than 50 percent fructose.
Instead, says Mohan, FDA's GRAS determination for HFCS creates "a floor, not a ceiling, for fructose levels," so blends that contain more than 55 percent fructose are still safe for use.
The solution is to avoid all fruits for a while, and then introduce small quantities of low fructose fruits, like berries, into the diet.
Many concerns about HFCS center on how the body processes fructose differently from glucose, with some evidence suggesting that fructose is more easily converted to fat than sucrose, and that fructose doesn't provoke the same level of satiety as other sugars, which could lead to overconsumption.
Because fructose seems to make people eat more, its intake should be reduced.
Glucose is better for us than fructose, according to this research, because it doesn't block the brain from registering the feeling of being full the way fructose does.
The results showed that the concentration of isobutyl acetate in the model apple juice matrix was impacted by sucrose and fructose concentrations, while the butyl acetate concentration was affected only by fructose.
Increases in fructose consumption over the years have paralleled this increase in body weight, leading a number to suggest a causal relationship.
com)-- Bioo Scientific is pleased to announce the launch of the MaxSignal[R] Fructose Assay Kit, an enzyme-based test kit for the rapid determination of fructose in food, beverage and fermentation samples.