Quote: (Originally Posted by
EBT)

Although theres also some debate as to the N2 effects supressing the tendency to toxicity (hyper excitation or something, Im a telecomms guy, not a wetware guru).....
...fun all this, isnt it

YES, it is fun! This is why I do this for a living and why we started Rubicon for everyone else to join in the fun.
This is an interesting point of debate you bring up. It came up a few months ago and I was caught off guard by it. So, I started looking for works to support/ refute this idea. Oddly enough, I found nothing. Well, they did some work here back in the early 80's that showed N2 suppressing HPNS seizure thresholds (mentioned above) so maybe they did look at O2. This thought prompted several emails to people I would consider experts in the field. ALL of the replies said basically the same thing (with various shades of frustration that people will believe anything). Here is one example:
Quote: (Originally Posted by Peter Bennett)
Never heard this before and I am not sure why he thinks it mght be. True N2 does help to ameliorate HPNS seizures, but O2 seizures are a different mechanism. In fact, in terms of effects on O2 convulsions, I did some animal studies which showed that nitrogen and oxygen (increased density and therefore increased CO2 retention) shortened the time to convulsions in that order. Helium, on the other hand, was best as it was little different from oxygen alone.