| 31. | One involved cooking-oil contaminated with two substances closely related to dioxin : polychlorinated biphenyls and furans.
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| 32. | Dioxins and furans, byproducts in almost all industry, have proved to be the hardest to regulate.
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| 33. | In furan a lone pair of the oxygen atom interacts with the ? orbitals of the carbon atoms.
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| 34. | Furan is a colorless, flammable, highly volatile liquid with a boiling point close to room temperature.
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| 35. | "' Benzofuran "'is the heterocyclic compound consisting of fused benzene and furan rings.
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| 36. | Some Ru-NHC complex catalyze asymmetric hydrogenations of benzofurans and furans . with high levels of enantioinduction.
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| 37. | The molecule is a derivative of furan, containing both aldehyde and ether ( methoxymethyl ) functional groups.
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| 38. | The first furan derivative to be described was 2-furoic acid, by Carl Wilhelm Scheele in 1780.
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| 39. | 2-Furanones can be converted to furans by a two-step process of reduction followed by dehydration.
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| 40. | The company was the first to produce 13C labeled chlorinated dioxins and furans in cooperation with Cambridge Isotope Laboratories.
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