Buckyballs Kill Fish

An anonymous reader writes "The Washington Post (free registration, not too invasive) has a disturbing article on a new study of the environmental dangers of nanotech. Buckyballs caused "severe" brain damage in largemouth bass when added to their aquariums in concentrations of 0.5 ppm, a concentration level on par with common US pollutants. They also caused die-offs of Daphnia, waterfleas that are a crucial part of the ocean food chain. "The new findings are somewhat surprising because many scientists had predicted that buckyballs would not linger in water but would quickly form clumps and sink." The findings have yet to be peer-reviewed."

Comments

Is this a real threat?

[Necro Spork]

From what I have read buckyballs have really neat conductive and structural properties. The article fails to state that there have been no commercially viable applications for the molecules. As long as that is true the fishes have little to worry about.

To Be more precise

[DrYak]

Brain damage is usually caused by oxygen starvation. Could the buckyballs be absorbing the oxygen from the bloodstream?

The biggest and quickkest damage doesn't come from the oxygen starvation itself, but by the return of blood flow.
Brain cells metabolism is oxygen based and produces lots of free radicals - toxic by-products that are produced by oxagen metabolism. Normally that isn't a problem for our cells, because they also have the tools to control free-radicals production and degradation (with help of anti-oxydizer and well controlled reactions...)
When blood flow is cut, cells are suffering from the lack of oxygen but are still managing to survive for a short period in some way (brain cells aren't as good at fermentation....)
During this period they may undergo some damage but are still viable (DNA and basic protein synthesis tools may be still intact). The problem is : part of this damage can happen on metabolic tools that are intended to control free-radicals. During this period, it doesn't matter, because as the cell doesn't recieve oxygen, it doesn't produce free radicals
The problems arises when blood flow comes back : some cell (the less damaged from the lack of blood) survive, some other, although viable get killed because oxygen metabolism restarts and free-radicals are produced again... but the cells aren't able to cope with them anymore !
This phenomenon is called Reperfusion Damage, and lot of research is currently done to find way to minimise it (example : using anti-oxidizers).
[HINT : google this keywords for more information on the subjet]

To get back to the main subjet : as this buckyballs are known to be good oxidiser, it's very probable that their oxydizing propreties are exceeding brain's capacity of handling free radicals
other typical damage of free radicals : cataract (I wonder if they found it too on the fishes ?)
other tissus like muscles are less prone to free-radical damage, because it's easier for them to divide and replace damaged cells with new clean one.