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  1. rurwin

    Study of third hand nicotine from e-cigarette

    It's the first in a series of experiments. The knowledge gained here would be useful in designing the next one now that it is known how different surfaces aggregate "nicotine". The reason I put nicotine in quotes is that I don't trust this experiment to have measured it. I'd have to see the...
  2. rurwin

    Study of third hand nicotine from e-cigarette

    Yes. If Dr. Farsalinos perchance reports that there are significant quantities of known toxins in a significant number of eliquid flavourings, will you accept it?
  3. rurwin

    The thread for Innokin SVD

    Hold + and - for a long time. First it shows power, then it shows resistance. When it shows power again it's unlocked.
  4. rurwin

    Study of third hand nicotine from e-cigarette

    Sorry I can not agree. It is absolutely necessary that science is done. The choice of experiment is not determined by the political bias of the scientist. We can not choose to not do an experiment because we might not like the result. While her experiment was flawed in that it did not use...
  5. rurwin

    Help with measuring needed..

    I don't need to know. :-) Anyone who wants to check their result can click the link I gave to Wolfram, or this discussion on sciforurms.
  6. rurwin

    Study of third hand nicotine from e-cigarette

    I think people are over-reacting to what is after all a high-school student's project. Certainly the reporting is bad, but the project itself is only as flawed as any number of e-cig studies have been. If a high-school student can match a mediocre career scientist, that's not a bad thing. Are...
  7. rurwin

    Study of third hand nicotine from e-cigarette

    I imagine that she won the award for designing the apparatus. It's just a pity that the experiment was fatally flawed.
  8. rurwin

    Help with measuring needed..

    Here's one I give to all the smart alec maths people. It's easy to remember, it sounds simple, but it requires maths at degree level: You have a circular lawn of radius r. Chained to a peg on the edge of the lawn, you have a goat. How long must the chain be so that the goat can eat half the...
  9. rurwin

    Help with measuring needed..

    We derived it a slightly different way. You equated the concentrations, whereas I equated the total nicotine.
  10. rurwin

    Help with measuring needed..

    Generally I just tied myself in knots :-D
  11. rurwin

    Help with measuring needed..

    Actually, deriving that formula in the first place is not totally obvious. We have an unknown amount of 6mg = X ml and an unknown amount of 24mg = Y ml We add those together and end up with (X + Y) ml Now we make a formula for the total amount of nicotine in the liquid. That's just...
  12. rurwin

    Help with measuring needed..

    My maths teacher hated me, because I would never do things the way I was told... (X * 6) + (Y * 24) / ( X + Y ) = 12 I'll restate that, because I don't like * and it's not algebraic-looking ;-) (6X + 24Y) / (X + Y) = 12 Multiply by (X + Y) 6X + 24Y = 12(X + Y) Multiply out 6X + 24Y = 12X +...
  13. rurwin

    Study of third hand nicotine from e-cigarette

    1. Nicotine doesn't hurt anyone, especially in these sorts of concentrations. It will be well below a microgram and the body gets rid of it in a couple of hours. 2. "Significantly increased". From zero? Or was there nicotine there before? Why? Are we talking significantly increased from...
  14. rurwin

    The thread for Innokin SVD

    My SVD is back in the backup box and I've got a Sigelei 20W with two third-party battery tubes. It's not cheap and it's not for anyone who wants to vape below 7W or at low powers below 1.8 ohms, but I love it.
  15. rurwin

    Trying to get the most out of my EVOD and failing

    Every tank wicks differently. I can run an RBA at twice the power I can run a Protank II with the same resistance coils. With a dual coil system, each coil is twice the resistance, so your 1.5 ohm heads have 3 ohm coils, and your 2.0 ohm heads have 4.0 ohm coils. It would probably require more...
  16. rurwin

    Finally Broke Down

    Joytech for batteries, Kanger for tanks.
  17. rurwin

    tell me what build to do !!!

    The first time (actually the only time) I recoiled an EVOD my coil was too small so I used too far too little cotton. It started gurgling, so I blew it out. Unbeknown to me, it was so badly wicked that I blew the cotton out of the wick holes and turned the EVOD into a juice straw. I'm sure you...
  18. rurwin

    Dripping vs Filling?

    I would recommend a Protank II or a Nautilus tank to start off with to go with an MVP. And also get yourself a cheap single-coil dripper. Something like the IGO-L or IGO-S. You don't want your vaping to be unsatisfying because your coil is bad. So learn to build coils and wicks on the dripper...
  19. rurwin

    battery charging

    Generally speaking, we don't treat batteries as harshly as an RC car. Those will be run close to their rated maximum current from the start of the drive to its end. Whereas we only run the batteries for a few seconds and then rest them for much longer before the next puff. It stands to reason...
  20. rurwin

    18490s in a Sigelei 20 Watt?

    And here they are, with a little camera magic. I'd have to be a bit careful with the 18350 tube; 20W will almost certainly over-stress a battery that small, but with what I was paying for postage it seemed pointless not to get the set.
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