Tag Archives: Second Life

Natural and engineered nanoparticles in an Orion magazine podcast & in a NanoBosc machinima piece

The Jan. 16, 2013 Orion magazine podcast discussion (more about that later) regarding safety and engineered and natural nanoparticles arose from an article (worth reading) by Heather Millar in the magazine’s January/February 2013 issue, Pandora’s Boxes.

For anyone familiar with the term ‘Pandora’s box’, Millar’s and the magazine’s bias is made clear immediately, nanoparticles are small and threatening. From the Pandora’s box Wikipedia essay,

Today, the phrase “to open Pandora’s box” means to perform an action that may seem small or innocuous, but that turns out to have severe and far-reaching consequences. [emphases mine]

Millar’s article is well written and offers some excellent explanations. For example, there’s this from Pandora’s Boxes,

So chemistry and physics work differently if you’re a nanoparticle. You’re not as small as an atom or a molecule, but you’re also not even as big as a cell, so you’re definitely not of the macro world either. You exist in an undiscovered country somewhere between the molecular and the macroscopic. Here, the laws of the very small (quantum mechanics) merge quirkily with the laws of the very large (classical physics). Some say nanomaterials bring a third dimension to chemistry’s periodic table, because at the nano scale, long-established rules and groupings don’t necessarily hold up.

Then, she has some dodgier material,

Yet size seems to be a double-edged sword in the nanoverse. Because nanoparticles are so small, they can slip past the body’s various barriers: skin, the blood-brain barrier, the lining of the gut and airways. Once inside, these tiny particles can bind to many things. They seem to build up over time, especially in the brain. Some cause inflammation and cell damage. Preliminary research shows this can harm the organs of lab animals, though the results of some of these studies are a matter of debate.

Some published research has shown that inhaled nanoparticles actually become more toxic as they get smaller. Nano–titanium dioxide, one of the most commonly used nanoparticles (Pop-Tarts, sunblock), has been shown to damage DNA in animals and prematurely corrode metals. Carbon nanotubes seem to penetrate lungs even more deeply than asbestos. [emphases mine]

I think it’s worth ‘unpacking’ these two paragraphs, so here goes.  Slipping past the body’s barriers is a lot more difficult than Millar suggests in the first paragraph. My July 4, 2012 posting on breakthough research  where they penetrated the skin barrier includes this comment from me,

After all the concerns  about nanosunscreens and nanoparticles penetrating the skin raised by civil society groups, the Friends of the Earth in particular, it’s interesting to note that doctors and scientists consider penetration of the skin barrier to be extremely difficult. Of course, they seem to have solved [as of July 2012] that problem which means the chorus of concerns may rise to new heights.

I had a followup in my Oct.3, 2012 posting titled, Can nanoparticles pass through the skin or not?, suggesting there’s still a lot of confusion about this topic even within the scientific community.

Moving on to the other ‘breaches’. As I recall, there was a recent  (Autumn 2012?) nanomedicine research announcement that the blood-brain barrier was breached by nanoparticles. I haven’t yet encountered any mention of breaching the gut and I mention lungs in my next paragraph where I discuss carbon nanotubes.

As for that second paragraph, it’s an example of scaremongering. ‘Inhaled nanoparticles become more toxic as their size decreases’—ok. Why mention nano-titanium oxide in pop tarts and sunblocks, which are not inhaled, in the followup sentence? As for the reference to DNA damage and corroded metals further on, this is straight out of the Friends of the Earth literature which often cites research in a misleading fashion including those two pieces.  There is research supporting part of Millar’s statement about carbon nanotubes—provided they are long and multiwalled. In fact, as they get shorter, the resemblance to asbestos fibers in the lungs or elsewhere seems to disappear as per my Aug 22, 2012 posting and my Jan. 16, 2013 posting.

You don’t need to read the article before listening to the fascinating Jan. 16, 2013 Orion magazine podcast with Millar (reading portions of her article) and expert guests, Mark Wiesner from Duke University and director of their Center for Environmental Implications of Nano Technology (CEINT was first mentioned in my April 15, 2011 posting), Ronald Sandler from Northeastern University and author of Nanotechnology: The Social And Ethical Issues, and Jaydee Hanson, policy director for the International Center for Technology Assessment.

The discussion between Wiesner, Sandler, and Hanson about engineered and natural nanoparticles is why I’ve called the podcast fascinating. Hearing these experts ‘fence’ with each other highlights the complexities and subtleties inherent in discussions about emerging technologies (nano or other) and risk. Millar did not participate in that aspect of the conversation and I imagine that’s due to the fact that she has only been researching this area for six months while the other speakers all have several years worth experience individually and, I suspect, may have debated each other previously.

At the risk of enthusing too much about naturally occurring nanoparticles, I’m mentioning, again (my Feb. 1, 2013 posting), the recently published book by Nanowiki, Nanoparticles Before Nanotechnology, in the context of the stunning visual images used to illustrate the book. I commented previously about them and Victor Puntes of the Inorganic Nanoparticles Group at the Catalan Institute of Nanotechnology (ICN) and one of the creators of this imagery, kindly directed me to a machinima piece (derived from the NanoBosc Second Life community) which is the source for the imagery. Here it is,

NanoBosc from Per4mance MetaLES ..O.. on Vimeo.

Happy Weekend!

Ethical nano in Second Life

Isn’t Second Life dead? Apparently not.

While you won’t be able to attend the live event online, there will be free access to the nano and ethics discussion held on July 20, 2012, from 1 pm to 4 pm EDT at the Terasem Island Conference Center in Second Life. The question and speakers were (from the July 20, 2012 event posting on the Kurzweil Accelerating Intelligence website,

What should be the ethical constraints on nanotechnology?

Speakers include:

  • Martine Rothblatt, Ph.D. — “Geoethical Rules for Nanotechnological Advances”
  • Peter Wicks — “Nanotechnology and the Environment: Enemies or Allies?”
  • Alex Wissner-Gross, Ph.D. — “Physically Programmable Surfaces”

The workshop is an exchange of scholarly views on uses of lifesaving nanotechnologies, including the impacts on people, accessibility, monitoring compliance with ethical norms.

I think if you check out the Terasem Island Conference Center in Second Life (SLURL), you will be able to access the archived discussion.

Flies carry nanoparticles; EPA invites comments; scientific collaboration in virtual worlds

A new study is suggesting that flies exposed to nanoparticles in manufacturing areas or other places with heavy concentrations could accumulate the particles on their bodies and transport them elsewhere. From the media release on Nanowerk News,

During the experiments, the researchers noted that contaminated flies transferred nanoparticles to other flies, and realized that such transfer could also occur between flies and humans in the future. The transfer involved very low levels of nanoparticles, which did not have adverse effects on the fruit flies.

It makes perfect sense when you think about it. Flies pick up and transport all manner of entities so why wouldn’t they pick up nanoparticles in their vicinity?

In other news, the US Environmental Protection Agency (EPA) has asked for comments on case studies of nanoscale titanium dioxide in water treatment and sunscreens. Presumably you have to be a US citizen to participate. For more information on the call for comments, check out this item on Nanowerk News. From the item,

EPA is announcing a 45-day public comment period for the draft document, Nanomaterial Case Studies: Nanoscale Titanium Dioxide in Water Treatment and Topical Sunscreen (External Review Draft), as announced in the July 31, 2009 Federal Register Notice. The deadline for comments is September 14, 2009.

Yesterday, I came across an announcement about scientific collaboration in a virtual world (specifically Second Life). It’s the first professional scientific organization, Meta Institute for Computational Astrophysics (MICA), based entirely in a virtual world.

This idea contrasts somewhat with the NanoLands concept from the National Physical Laboratory in the UK where an organization with a physical location creates a virtual location. (You can see my interview with Troy McConaghy, part of the original NanoLands design team, here.)  The project blog seems to have been newly revived and you can find out more about NanoLands and their latest machinima movies. (If you want to see the machinima, you need a Second Life account.)

What I found particularly interesting about MICA is this bit from their media release on Physorg.com,

In addition to getting people together in a free and convenient way, virtual worlds can offer new possibilities for scientific visualization or “visual analytics.” As data sets become larger and more complex, visualization can help researchers better understand different phenomena. Virtual worlds not only offer visualization, but also enable researchers to become immersed in data and simulations, which may help scientists think differently about data and patterns. Multi-dimensional data visualization can provide further advantages for certain types of data. The researchers found that they can encode data in spaces with up to 12 dimensions, although they run into the challenge of getting the human mind to easily grasp the encoded content.

Shades of multimodal discourse! More tomorrow.

Interview with Troy McConaghy (part of the Nano Lands team)

The Nano Lands project is the UK’s National Plysical Laboratory’s (NPL) Second Life Nanotechnology project. It’s a virtual environment where they’ve developed a whole series of nano displays and experiences. Troy McConaghy who helped to construct Nano Lands very kindly answered some questions about himself and the project,

What you do: I do projects in the virtual world Second Life.

Where are you located: (Ontario?) Yes, Waterloo, Ontario, Canada

[How did you get the job?] I knew a guy working at NPL from our involvement with the International Spaceflight Museum, among other things.  He wanted to hire me to do this job and I accepted the offer.

Did you know much about nanotech before you started? A little bit.

What did you learn about nanotech from working on this project? I learned a lot about nanotech, from the exhibits and events that happened while I was on that project: how MOSFETs are built, how AFMs work, the history of nanotubes, how the University of Waterloo set up the first undergraduate program in nanotechnology and much more.

Do you have any advice for someone who wants to vast Nano Lands? Do you mean visit? You can visit them today – just open the “Map” in Second Life and look for “Nanotechnology” – it’s the name of the sim. Then teleport there.

What advantages does a virtual environment offer for someone wanting to find out about nanotech? You can see models and simulations that would either be impossible or very expensive in the physical world.

Is there anything you’d like to add? One should really be careful to distinguish nanoscience from nanotechnology. Science is not technology.

(Interview Edited [October 25, 2010] to change font size and increase readibility.) More about Troy McConaghy here.  For those not familiar with the abbreviation AFM, that’s an atomic force microscope, which is often used when working at the nanoscale. I had to look up MOSFET and according to Wikipedia, it’s a metal-oxide-semiconductor field-effect-transistor, which is used to amplify or switch electronic signals. My guess is that they use this device at the NPL and decided to reproduce it in Second Life.

That last comment of McConaghy’s about science and technology is interesting for a number of reasons. Nanotechnology in particular has a problem. While the idea was more or less defined by Richard Feynman, a physicist, in a talk he gave in 1959 (there’s some debate about where it really starts by literary theorists), The idea was named ‘nanotechnology’ by Norio Taniguchi, an engineer, in 1974. It then got popularized by another engineer, K. Erci Drexler in his 1986 book, ‘Engines of Creation’. I have more about the origins story on my wiki. (if you want to check it out, go to studentnanomysteries.pbwiki.com and either use the origins tag or View all pages and check out the ‘Storytellers create nano’ and the ‘Modern Times’ pages.

Back to science and technology, I think the genie is out of the bottle where nanotechnology is concerned. Personally, I don’t like the conflation and I don’t think the increasing pressure that scientists of all stripes are under to do only work that has commercial applications (the sooner, the better) is good for us as a society.  We need the dreams and we need the ideas not just because they might be useful some day in the future but because it enriches us all in some indefinable, unquantifiable fashion.