Edward Willett

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Fuel from germs

[podcast]http://edwardwillett.com/wp-content/upLoads//2010/01/Fuel-from-Germs.mp3[/podcast] For years, we’ve been turning crops such as corn, wheat and sugar beets into fuel, using yeast to convert sugar into alcohol. But there’s an obvious problem with this. That stuff we’re turning into fuel is also food for humans and feed for animals. (And as an aside, how come we always call it “animal feed” as opposed to “animal food”? And why don’t we ever refer to “human feed”? Hmm?) A lot of the plant is wasted when you grow crops for fuel or food. The leaves and stems, with their tough cell walls made of cellulose, hemicellulose and lignin, are more of a nuisance than anything else. Wouldn’t it be great if there were a use for what is now plowed ...

Posted by Edward Willett at 12:36, January 29th, 2010 under Blog, Columns, Science Columns | Comment now »

Liquid fuel from solar power

[podcast]http://edwardwillett.com/wp-content/upLoads//2009/07/Liquid-Fuels-from-Solar-Power.mp3[/podcast] In recent years, scientists and engineers have turned to biofuels—fuels generated from living things, and hence renewable—as a means of weaning us off of fossil fuels in favor of something cleaner, less likely to run out, and less wrapped up in international geopolitics. Fermenting the sugars found in corn or other grains into ethanol has been around for a long time, of course, and it’s pretty much a proven technology. On the other hand, do we really want to be turning food into fuel? More promising have been recent advances in turning lignocellulose, the stuff that makes up the cell walls in plants, into ethanol and other fuels: that would allow us to use grasses, wood chips, straw and other non-food as ...

Posted by Edward Willett at 14:42, July 28th, 2009 under Blog, Columns, Science Columns | Comment now »

Tearless onions

Download the audio version.Get my science column weekly as a podcast.I’m a sensitive kinda guy. I fact, I’m so sensitive I sometimes tear up just during the process of making dinner.It’s not that I’m overcome with emotion at the blessing of having at my disposal the wherewithal to stir-fry. (I’m not that sensitive.) No, it’s usually because I’m slicing onions.Onions have been a part of the human diet since prehistoric times. We don’t even know where they originated: some say central Asia, others Iran or West Pakistan. (So I learned from the interesting history of onions I found on the website of the U.S.’s National Onion Association, an organization whose very ...

Posted by Edward Willett at 20:25, February 4th, 2008 under Blog, Science Columns | 3 Comments »

Genetic modification of large animals just got easier

Efforts to genetically modify large animals have been hindered by the fact that the two methods currently used to effect it, somatic cell nuclear transfer or pronuclear injection, are costly, inefficient, difficult, and carry a risk of producing abnormal offspring. Now researchers at the University of Pennsylvania School of Veterinary Medicine have successfully produced genetically modified mice and goats by ...

Posted by Edward Willett at 17:13, September 21st, 2007 under Blog | Comment now »

"The Spider-Goat Clones of Montreal," revisited

Every day or two I check the SiteMeter stats for edwardwillett.com, and today I noticed my visits were around 200 higher than I would expect (I usually get 350 to 450 visitors each day, but today I'm up over 600). A check revealed that the extra traffic is coming from people searching for "spider goat" or "spider goats," which leads them to this eight-year-old column called "The Spider-Goat Clones of Montreal," about Nexia Biotechnologies' successful efforts to create a herd of goats containing a spider gene that resulted in spider-silk proteins being expressed in their milk. Nexia hoped to harvest the spider silk from the milk for a variety of purposes, from medical sutures to bullet-proof vests....

Posted by Edward Willett at 5:47, April 10th, 2007 under Blog, Science Columns | 2 Comments »

Made-to-order DNA…

...is about to get a lot easier to create:Installing one of those prefab, snap-together wood-flooring kits is a lot easier than shaping and sanding rough planks. Adapting a similar construction strategy, a biotech startup called Codon Devices, based in Cambridge, MA, aims to streamline genetic engineering. It makes made-to-order DNA strands, freeing scientists from the finicky work it takes to put together a complicated piece of DNA the old-fashioned way.That capability could soon change the face of molecular biology. As it becomes cheaper and cheaper to create large chunks of genetic material from scratch, scientists will be able to make ever more complex biological creations. "In the next few years, we'll probably see people engineering ...

Posted by Edward Willett at 15:26, April 9th, 2007 under Blog | 1 Comment »

Farming mutates into pharming:

"Genetically modified chickens lay drugs in eggs."

Posted by Edward Willett at 4:57, January 24th, 2007 under Blog | 1 Comment »

Cotton: it’s what’s for dinner

Or, at least, it could be soon:"The exciting finding is that we have been able to reduce gossypol – which is a very toxic compound – from cottonseed to a level that is considered safe for consumption," said Dr. Keerti Rathore, Texas Agricultural Experiment Station plant biotechnologist. "In terms of human nutrition, it has a lot of potential." The cottonseed from these plants meet World Health Organization and U.S. Food and Drug Administration standards for food consumption, he said, potentially making the seed a new, high-protein food available to 500 million people a year.

Posted by Edward Willett at 16:48, November 20th, 2006 under Blog | 2 Comments »

Have yourself a genetically modified little Christmas

Searching for the perfect Christmas tree can be a hassle, and even a tree that looks great on the lot can turn out to have weird branches, flat spots or gaps once it opens up. But someday soon, every Christmas tree may be perfect, thanks to science. Around 40 million Christmas trees are harvested every year in the U.S. and Canada, most from Christmas tree farms. A small to medium tree farm will harvest 10,000 trees, and some of the multinational giants harvest up to a million trees annually on plantations from North Carolina to Nova Scotia. (Christmas tree farms, by the way, are also oxygen farms. One acre of ...

Posted by Edward Willett at 11:53, December 14th, 1999 under Blog, Columns, Science Columns | Comment now »

The spider-goat clones of Montreal

  Cloned, genetically altered goats producing spider silk in their milk sounds like something out of The X-Files, but it was in all the papers last week when a company called Nexia revealed it had cloned three goats (Clint, Danny and Arnold), and explained why. The cloning of goats brings to four (sheep, mice, cows and goats) the number of species that have been cloned since Dolly the sheep made headlines a couple of years ago, using a process called nuclear transfer. A clone is an exact genetic copy of an existing animal. Every cell in an animal's body contains the complete genetic information for the entire animal within its nucleus. In nuclear transfer cloning, cells are taken from the animal ...

Posted by Edward Willett at 22:45, May 4th, 1999 under Blog, Columns, Science Columns | Comment now »