Professor Scott Dunbar at the University of British Columbia’s (Canada) Norman B. Keevil Institute of Mining Engineering needed to partner with colleagues Sue Curtis and Ross MacGillivray from the Centre for Blood Research and the Department of Biochemistry and Molecular Biology after (from the media release on Nanowerk News),
“I read an article about bacteriophage – viruses that infect bacteria – being used to create nanodevices in which proteins on the phage surface are engineered to bind to gold and zinc sulfide,” says Dunbar. “And it struck me: if zinc sulfide, why not copper sulfide? And if so, then it might be possible to use these bio-engineered proteins to separate common economic sulfide minerals from waste during mineral extraction.”
Together the researchers have developed a procedure called “biopanning.” It’s a kind of genetic engineering which could lead to some useful applications.
It turns out that the phage that bind to a mineral do affect the mineral surfaces, causing them to have a different electrical charge than other minerals. The proteins on the phage also form links to each other leading to aggregation of the specific sulfide particles. “The physical and chemical changes caused by phage may be the basis for a highly selective method of mineral separation with better recovery. Another possible application is bioremediation, where metals are removed from contaminated water” says Dunbar.
In other BC news, the University of Victoria (Canada) will be getting a new microscope which senses at subatomic levels. (From the media release on Azonano),
The new microscope-called a Scanning Transmission Electron Holography Microscope (STEHM) — will use an electron beam and holography techniques to observe the inside of materials and their surfaces to an expected resolution as small as one-fiftieth the size of an atom.
This is being done in collaboration with Hitachi High-Technologies which is building the microscope in Japan and installing it at U Vic in late 2010. The microscope will be located in a specially adapted room where work to prepare and calibrate it will continue until it becomes operational sometime in 2011.
After my recent series on robots and human enhancement, I feel moved to comment on the situation in the US vis a vis Henry Louis Gates, Jr. and his arrest by the police officer, James Crowley. It’s reported here and elsewhere that neither the recording of the 911 call nor the concerned neighbour who made the call support Sergeant Crowley’s contention that the two men allegedly breaking into the house were described as ‘black’.
Only the participants know what happened and I don’t fully understand the nuances of race, class, and cultural differences that exist in the US so I can’t comment on anything other than this. It is human to hear what we expect to hear and I have an example from a much less charged situation.
Many years ago, I was transcribing notes from a taped interview (one of my first) for an article that I was writing for a newsletter. As I was transcribing, I noticed that I kept changing words so that the interview subject sounded more like me. They were synonyms but they were my words not his. Over the years I’ve gotten much better at being more exact but I’ve never forgotten how easy it is to insert your pet words (biased or not) when you’re remembering what someone said. Note: I was not in a stressful situation and I could rewind and listen again at my leisure.
I hope that Crowley and Gates, Jr. are able to work this out in some fashion and I really hope that it is done in a way that is respectful to both men and not a rush to a false resolution for the benefit of the cameras. For a more informed discussion of the situation, you may find this essay by Richard Thompson Ford in Slate helpful. It was written before the recording of the 911 call was made public but I think it still stands.
My reason for mentioning this incident is that human nature tends to assert itself in all kinds of situations including the building of robots and the debates on human enhancement, something I did not mention in my series posted (July 22 – 24, 27, 2009).