Edward Willett

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Teflon

The first time I saw a Teflon-covered pan, when I was four or five, I thought it was magic. Now that I cook, I'm even more impressed by non-stick surfaces. Teflon was discovered by accident by Roy J. Plunkett, 27, a DuPont scientist who was trying to develop a new chlorofluorocarbon (CFC) for use as a refrigerant by reacting a gas called tetrafluoroethylene (TFE) with hydrochloric acid. He'd prepared 100 pounds of TFE in pressure cylinders, which, for safety reasons, he stored in dry ice. On the morning of April 6, 1938, Plunkett's assistant, Jack Rebok, opened the valve of a canister of TFE--and nothing came out. They weighed the cylinder. The gas was still inside, ...

Posted by Edward Willett at 3:47, January 30th, 2001 under Blog, Columns, Science Columns | Comment now »

Barbecuing II

There are still a few good weeks of summer left, and that means there's still plenty of time for the ultimate summer activity, barbecuing. Technically, what we call barbecuing around here is not true barbecuing, which involves the long, slow cooking of meat, often over hours, at relatively low temperatures in the presence of lots of wood smoke. But say "barbecue" in these parts, and everyone thinks of grilling over an open fire. The word "barbecue" comes to us from the Caribbean, along with the word "cannibal." (I'll leave any connection between the two to your imagination.) For years outdoor cooking meant cooking over charcoal, most commonly charcoal briquets. Briquets are made of scrap wood ...

Posted by Edward Willett at 11:24, August 15th, 2000 under Blog, Columns, Science Columns | Comment now »

The thermodynamics of turkey

"Christmas is coming, the goose is getting fat," goes the old song, but these days, goose is a rare sight on the Christmas table. Instead, the place of honor goes to the turkey. Turkeys are native to North American. In 1519 Spanish ships introduced them to Europe. By the 1700s turkey drives were being held from Norfolk to London. (If cattle drivers are cowboys, are turkey-drivers "turkeyboys?") In 1851 Queen Victoria ate turkey instead of the traditional swan at Christmas, and by late Victorian times, the turkey had supplanted the goose at English Christmas feasts. With this change came the annual battle to cook a turkey perfectly. The problem is that few people approach the cooking ...

Posted by Edward Willett at 13:57, December 20th, 1999 under Blog, Columns, Science Columns | Comment now »

Umami

  My wife and I recently returned from the annual International Festival of Wine and Food at the Banff Springs hotel, where the master of ceremonies, Tim Hanni, presented a fascinating (and very funny) seminar on matching wine with food. Much of Hanni's talk was devoted to exactly how the sense of taste works. It's amazing, but all the enormously varied tastes we enjoy as we eat different foods are technically made up of just a handful of basic tastes. Traditionally, those have been listed as sweet, sour, salt and bitter; but increasingly, Western scientists have begun to accept the long-held Japanese belief that there is a fifth basic taste, called "umami"--a taste Hanni, who is also a chef, is ...

Posted by Edward Willett at 14:42, November 6th, 1999 under Blog, Columns, Science Columns | Comment now »

Kitchen germs

In my small, elderly house, the bathroom opens onto the kitchen, which has always worried me: I keep picturing armies of bacteria marching out of the bathroom to contaminate my food. It turns out my concern is misguided: a recent study indicates it's more likely bacteria from the kitchen will contaminate my bathroom.. Scientists from the University of Arizona in Tucson tested several houses and discovered the kitchens were almost always more contaminated with bacteria than the bathrooms, even by germs spread by fecal contamination, such as E. coli (source of "Hamburger disease"). In fact, the average toilet rim was relatively germ-free compared to the average counter top....

Posted by Edward Willett at 11:05, February 24th, 1997 under Blog, Columns, Science Columns | Comment now »

Food preservation

As a kid, I found the kitchen a rather mysterious place, filled with exotic implements like the bizarre "colander," the ominous "deep-fat fryers," and the straight-out-of-the-mad-scientist's-laboratory "pressure cooker," as well as bizarre ingredients like "bouillon," "baker's chocolate" (real chocolate's evil twin), "paprika," "cloves," and something called "pectin." Both the pressure cooker and pectin mostly came into play this time of year, when my mother would undertake strange rituals involving fruits and vegetables which I never really understood until...well, until this week, actually, when I decided to write this column. Two things cause fruits and vegetables to spoil: microbes (bacteria and molds) and the plant's own enzymes, ripen fruits and vegetables in the first place but ...

Posted by Edward Willett at 20:51, September 26th, 1995 under Blog, Columns, Science Columns | Comment now »

Salt

Okay, it's pop quiz time. What mineral is used in greater quantities and for more purposes than any other? Give up? I'll give you a hint: it's the only mineral we sprinkle on both our roads and our French fries. That's right: salt. Those innocuous little white crystals in the shaker on your table are actually one of the cornerstones of our civilization--not to mention our own bodily well-being. Common table salt--sodium chloride to its friends--isn't called common for nothing. It's found all over the place, especially in the oceans, which contain enough of it to cover the Earth's surface with a layer of salt 35 centimetres deep should they ever dry out. It's also ...

Posted by Edward Willett at 21:25, February 28th, 1995 under Blog, Columns, Science Columns | Comment now »

Canning

This week I'd like to write about canning. No, no, no, this isn't a column about corporal punishment in Singapore. "Canning," not "caning," as in, "Open up another can of beans, Ma, company's coming up the walk." Canning is a form of food preservation, something humans have been interested in ever since some early hominid discovered the principle of the best-before date: a haunch of mastodon is best before it turns green. Food spoils for a number of reasons. Topping the list are microorganisms. Bacteria and fungi feed on the same food we do and excrete noxious substances in the process. Enzymes, which are present in all ...

Posted by Edward Willett at 11:18, November 8th, 1994 under Blog, Columns, Science Columns | Comment now »

Barbecuing

Summer may officially begin tomorrow, on the summer solstice, but for many people, summer really begins the first time they're able to barbecue in their backyard. I am not one of them. I enjoy eating the fruits of someone else's barbecuing efforts as much as the next guy, but to actually stand at the grill? Forget it. Too much effort for too little reward, to my way of thinking. Still, barbecuing--or, more accurately, grilling--has an ancient and honorable history. Of course, the first cooking anybody did of meat was simply roasting it on a spit over an open fire, which is a sort of barbecuing. Grilling had to wait until ...

Posted by Edward Willett at 11:18, June 20th, 1994 under Blog, Columns, Science Columns | Comment now »