This post deals with the fascinating world of functional fragrance: the commercial art of adding aromas to household products. Since so much money is riding on this, it tends to be highly secretive, and it’s very difficult to get those involved to really tell stories about the tricks and techniques that make these products and deal with our perceptually messy selves. John has moved on to other things, so was happy to share some insights with me.
It’s obvious that we human beings are all pretty different from one another—in appearance, experience, attitude, gender, and countless other attributes. Each of us has things that come effortlessly and others at which we struggle. It goes without saying that these differences affect our abilities as tasters. But how, exactly?
A universal truth that keeps popping up in my search of the literature is that nothing is as simple as it seems. A sniff seems just a simple movement of air, but it’s actually way more than that: it’s a psychomotor event. One crucial function is to synchronize the olfactory receptor cells with the olfactory bulb and other smell-related brain regions, especially the primary olfactory processing center, the piriform cortex. This allows different regions to communicate with each other…
Beer is more complex than any other beverage known. No one’s keeping the master list of odor chemicals, but it’s huge. Hops alone contain more than 1000 terpenoids with citrus, floral and other aromas, with many other chemicals, too. In malt, Maillard and other browning processes create hundreds more. Fermentation and subsequent maturation creates a third enormous family of aromas, yet there are more. Add them all up and you get far in excess of the widely quoted number of 600–1000 odor chemicals in wine.
A single element might seem an odd choice as a theme for a beer article, but this one is truly special. Of all the things in the universe our noses are capable of smelling, sulfur compounds are by far the stinkiest. Because of its importance in a host of biochemical processes, quite a few volatile sulfur compounds are found in beer. Many of them are detectable in astonishingly small quantities.