Jump to content

chenbeier

Senior Members
  • Joined

  • Last visited

Everything posted by chenbeier

  1. The attachment is broken. Can not open.
  2. Neutron can be developed by reacting alpha particles with Beryllium 9 Be 4 He + 9 Be -> 13C 13 C => 12 C + n
  3. No for alcohol. But alcohol can be determined by testtube with chromium sulfuric acid. Used in tubes used by police to determine alcohol in breathing air from drunken drivers. Methanol and ethanol can divided by boric acid. First one gives boric methyl ester what burns in green flame. The Ethyl ester is only made up by adding sulfuric acid. Other test Strips are used for pH, Sulfide (lead acetate paper), oxidisers (potassium iodide starchpaper). Glucose in urine for diabetic,
  4. Should be no difference.
  5. No, otherwise we would not have a problem with the climatic and energy.
  6. Correct. If it would so easy then it would be developed already.
  7. It will not work, a biological catalyst works different as inorganic catalyst. Only to mix CO2 and water gives sparkling water nothing else. Its not only a matter of temperature. At least it needs nature or let say influence of higher spirit like god.
  8. I think there will be no more new information so the topic can be closed by admin.
  9. Already mentioned before
  10. This I told already above in the first post of mine in this thread.
  11. I think this is only possible on or in the Sun.
  12. This probably a condition in a lightning, what I wrote above.
  13. This is a different thing. First also hydrogen is present and for making ammonia catalysts are used. So there are surface reactions . Has nothing to do with breaking up a nitrogen molecule and keep it atomic.
  14. I would say N alone is not existing. If for some reason it is present it will react directly to N2 or react with other atoms. It was reported you find it during thunderstorm in lightnings.
  15. The dilution alone will not help, to increase pH. Add some sodium carbonate carefully and get pH up.
  16. Should work work, probably need pH adjustment to 6- 6.5 first. Aqua Regina is high acidic, it will eat first the metasulfite by releasing a lot of SO2, very poison. Need good hood with exhaust. But if you close to neutral the Gold could be precipitate. I think there should be receipes in the net. I would use Vitamin C Ascorbinic acid instead to avoid the the release of sulfur dioxide. After you got the Gold, a good rinsing with slight acidic water will remove all other chemicals.
  17. It will endlich up as a stable product. By recombination, transferring ,oxidising or reducing.
  18. We give not advice for pharmaceutical Products. Ask your physisian.
  19. As I wrote to make it accurate you need specific gravity of the solution. If you have this then you can convert ng/kg to ng/l Roughly 1 kg ~ 1 l The mass you can convert to mol with n = m/M In this case for 100 ppt it is 39 * 10^-9 g/ 23 g/ mol = 1,69 * 10^-9 mol This amount is in 1 l, so the concentration is 1,69*10^-9 mol/l.
  20. 1 ppt = 1 ng/ kg NaCl molar weight is 58,5 g/ mol, Na molar weight 23 g/ mol The ratio is 1 g NaCl is equal to 0,39 g Na So 1 ppt NaCl is 0,39 ppt Na = 0,39 ng/kg Na 100 ppt correspond to 39 ng/kg For the volume you need specific gravity of the solution. Probably with this low concentratian it's 1 g/ml
  21. chenbeier replied to kenny1999's topic in Chemistry
    Microplastic is added in some products, like shampoo, hairdressing agents, washing powder, etc. So it comes automatically in our water by using it. Plastic Material itself has a long shelftime. But by sunlight, biological enzymes it will be destroyed over years down to small particles like microplastic itself.
  22. I think its 1/1.5 * 100% = 66,6%
  23. What does dosing 100mg and Tmax 2-4 h mean. You have a start concentration of 363,3 ng/ml, you have given half life time 11.21 h and a time 5 days Decay rate is 0.5*A(0) = A(0)* e^(-k*11.21 h) -0,693 = - k* 11.21 h => k= 0,06183*h^-1 5 days = 120 h A(5d) = 363,3ng/ml* e^(-0,06183*h^-1*120h) A(5d) = 0,217 ng/ ml is left after 5 days. Where do you put the 100 mg and the Tmax.
  24. And also no recipies to make drugs.

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.