furan

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fu·ran

(fyū'ran),
1. A cyclic compound found, usually in saturated form, in those sugars with an oxygen bridge between carbon atoms 1 and 4, or 2 and 5, or 3 and 7, for which reason they are known as furanoses.
2. Oxa-2,4-cyclopentadiene.

furan

(fūr′an″, fū-ran′) [ furfuran, a former name]
C4H4O, an organic aromatic hydrocarbon, similar in shape to benzene, containing four carbon atoms and one oxygen atom. It is the structural source from which many useful pharmaceuticals are synthesized, including a wide variety of antibiotics.
CAS # 110-00-9
References in periodicals archive ?
The purpose of the new technology is to help bridge the gap between phenolic-urethane nobake (PUNB) and furan binder systems in terms of speed and environmental characteristics.
In an interesting twist, spruce needles near the fire site were analyzed for dioxins and furans (air particulate sampling is more common); the amounts in the needles again showed the levels of chlorinated dioxins and furans were within ".
Al Bulckaert, President and CEO of Bennett Environmental remarked "that this new amendment to RSI's C of A will open up new markets for Bennett to treat soils contaminated with dioxins and furans and will provide a much needed alternative to the current process of temporarily capping dioxin and furans contaminated sites.
Supply, installation and maintenance of fixed samplers dioxins and furans as well as the provision, management and analysis of sample cartridges in accordance with the Decree of 3.
Tetra- through Octa-Chlorinated Dioxins and Furans by Isotype Congeners in Water, Soil, Sediment, and Tissue by HRGC/HRMS.
Furans and silicates are the most difficult to strip and are more brittle when cured.
Specifically, the new amended Certificate of Authorization provides that within 18 months RSI will comply with an annual average ambient air quality criteria of 60 fg TEQ/m3 for dioxins and furans that are attributable to its operations.
Full compliance with other regulatory reforms under the Canadian Environment Protection Act, requiring pulp mills to virtually eliminate dioxins and furans from the effluent, must be achieved by 1994.
Other binders are based on resins formed by reactions of formaldehyde, phenol, isocyanates, furans or combinations of these.
In sending this Prior Notice to the issuance of an Order, pursuant to Section 25 and 27 of the Quebec Environment Quality Act, the Ministry of the Environment alleges that the increase in levels of dioxins and furans are directly related to the Recupere Sol plant and ignores several other factors that are in no way linked to the operations of the Recupere Sol plant.
Aside from dioxins and furans, which are inadvertent by-products of some combustion (SN: 1/29/00, p.
Under the planned changes, pulp mills would have to reduce dioxins and furans, a suspected cause of birth defects and cancer, in their waste water to levels that cannot be measured by a specific procedure by Jan.