The formation of furan
was correlated with the pH, sugar content, titratable acidity and ascorbic acid content of the produce.
The mixture of sand and furan
binder, thus organically bonded moldings, gives way and forms surface cracks.
Structural Characterization of Naphthoxazines Containing Furan
The UV spectra were monitored over a range of 450 to 200 nm, while the chromatograms were recorded at 273 nm to detect the furan
ester derivative (1), and to detect malformins A (2) and C (3) the PAD detector was set at [lambda] = 203 nm.
As shown in Figure 9(a) and Figure 9(b), both furan
and 25DHF ignition are greatly prohibited by hydrogenation reaction of furan+H=[C.sub.4][H.sub.5]O-3, which is the largest furan
consumption reaction in laminar flames  and ignition behind shock waves .
When the pyrolysis was conducted over MCM-48 catalysts, however, the production of furans
and aliphatic and aromatic hydrocarbons was enhanced considerably, whereas the fraction of phenolics decreased significantly.
Moreover, Table 2 shows that the 2s atomic orbital (AO) contribution of Y = O, in the O-C bond is more important in [X.sub.3]Al-furan (X = H, F, Cl and Br) complexes than that in isolated furan
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).
Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs), commonly referred to simply as dioxins and furans
, are toxic chlorinated compounds that are usually released as mixtures into the environment.
The scientists analyzed furan
from the irradiated samples using solid phase microextraction and gas chromatography-mass selective detection techniques.
A mixture solution of 11.0 g (0.1 mol) acetyl furan
, 30 mL ethanol was placed into the flask; another 12.0 g isopropyl nitrite (0.2 mol) was added into the addition funnel keeping the reaction temperature at 15[degrees]C.
KEY WORDS: dioxin, furan
, trace metals, chromium, nickel, St.