furan


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Related to furan: furan resin

furan:

see furfuralfurfural
or furfuraldehyde
[Lat.,=bran], C4H3OCHO, viscous, colorless liquid that has a pleasant aromatic odor; upon exposure to air it turns dark brown or black. It boils at about 160°C;.
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Furan

 

(furfuran), a heterocyclic compound; a colorless liquid, with a chloroform odor and a boiling point of 31.33°C. A large group of organic compounds, many of which are of practical

value, are derived from furan, for example, furfural, tetrahydrofuran, and 2-methylfuran. Furan is obtained primarily from furfural. It is an intermediate product in the synthesis of tetrahydrofuran; it is also used in the preparation of pyrrole, by a reaction with NH3 in the presence of Al2O3.

furan

[′fyu̇r‚an]
(organic chemistry)
One of a group of organic heterocyclic compounds containing a diunsaturated ring of four carbon atoms and one oxygen atom.
C4H4O4 The simplest furan type of molecule; a colorless, mildly toxic liquid, boiling at 32°C, insoluble in water, soluble in alcohol and ether; used as a chemical intermediate. Also known as furfuran; tetrol.
References in periodicals archive ?
Scientists led by Javier Santos, a professor at the Department of Analytical Chemistry at the University of Barcelona said in the journal <em>Food Chemistry</em> that higher concentrations of furans are found in espresso (43a[euro]146 nanograms per mililitre) than in coffee made in drip coffee makers, with normal coffee getting higher readings (20a[euro]78 ng/ml) than decaffeinated coffee (14a[euro]65 ng/ml).
Our study was limited, for it focused on only two select congeners out of the 75 dioxin and 135 furans that exist, and only looked at the sum of 17 dioxin/furan congeners to evaluate total TEQs.
The formation of furan was correlated with the pH, sugar content, titratable acidity and ascorbic acid content of the produce.
After processing, samples for dioxin and furan analysis were submitted to the analytical laboratory on July 19, 2004.
The glass fiber reinforced composites were prepared by a mixture of equimolar MAF and furan resin (40 wt% of total glass cloth) dioxane was stirred well for 2 to 5 min.
2010, on incineration imposes equip the chimneys of incineration plants with a semi-continuous measurement of dioxins - furans on 07.
Figure 3 shows a comparison of the percentage tensile loss in the interval test versus the B scale mold hardness gauge measurement for the furan nobake.
The measured levels of dioxins and furans were as much as 16 times lower than the Ontario emission limits.
OBJECTIVES: We tested the hypothesis that altered expression of genes related to cell cycle control, apoptosis, and DNA damage may contribute to the carcinogenicity of furan in rodents.
CEMEX subsequently conducted testing, supervised and approved by CDPHE, which clearly showed that, at the temperatures the plant operates under, there were no exceedances of dioxin or furan.
USDA-ARS scientists wanted to see if furan could be caused by irradiation in common freshly cut fruits and vegetables which vary widely in their sugar and ascorbic acid content.
Lufkin's lines are each capable of producing 40 tons/hour of phenolic urethane or furan nobake bound sand, and the reclamation equipment is scheduled for completion in mid-2008 by Simpson Technologies Corp.