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Substrates containing two phenols (or an aniline and a phenol; see equation (8) below for a related example), undergo oxidative coupling in the presence of hypervalent iodine(III) reagents. Coupling of both the ortho and para positions is possible; however, the use of bulky silyl-protected phenols provides complete selectivity for para coupling ...
This article concerns coating applications in the food industry. There are many similarities between coating processes and numerous examples of technology transfer to and from the food industry. Coating in the food industry is the application of a layer of liquids or solids onto a product. The operation essentially relies on mechanical energy.
See also References Further reading External links A acidulate To use an acid (such as that found in citrus juice, vinegar, or wine) to prevent browning, alter flavour, or make an item safe for canning. al dente To cook food (typically pasta) to the point where it is tender but not mushy. amandine A culinary term indicating a garnish of almonds. A dish served amandine is usually cooked with ...
Phenol is so inexpensive that it also attracts many small-scale uses. It is a component of industrial paint strippers used in the aviation industry for the removal of epoxy, polyurethane and other chemically resistant coatings. [33] Safety concerns have caused it to be banned from use in cosmetic products in the European Union [34] [35] and Canada.
The synthesis and processing of polyacetylene films affects the properties. Increasing the catalyst ratio creates thicker films with a greater draw ratio, allowing them to be stretched further. [ 8 ] Lower catalyst loadings leads to the formation of dark red gels , which can be converted to films by cutting and pressing between glass plates. [ 20 ]
If the meat is cold smoked, it should be dried quickly to limit bacterial growth during the critical period where the meat is not yet dry. This can be achieved, as with jerky, by slicing the meat thinly. The smoking of food directly with wood smoke is known to contaminate the food with carcinogenic polycyclic aromatic hydrocarbons. [34]
The Dutch painting forger Han van Meegeren mixed phenol formaldehyde with his oil paints before baking the finished canvas, in order to fake the drying out of the paint over the centuries. [citation needed] Atmospheric re-entry spacecraft use phenol formaldehyde resin as a key component in ablative heat shields (e.g. AVCOAT on the
Aqueous film coating is the most common film coating method currently used. [1] This type of film coating uses water to aid in the film coating process instead of organic solvents. [ 1 ] The result is a safer means of film coating, as it avoids the toxic and flammable properties of organic solvents.