We all had lots of stories of our sad experiences - they mourned the death of my wife with me - but we were hopeful that the children would return.

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• Otto Frank:

  For me, it was a revelation. There, was revealed a completely different Anne to the child that I ha

• Otto Hahn:

  I knew that the Hague Convention prohibited the use of poison in war. I didn't know the details of

• Otto Hahn:

  At first the English were very surprised by our disregarding the Hague Convention. But from 1916 on

• Otto Hahn:

  I felt profoundly ashamed, I was very much upset.

• Otto Hahn:

  First we attacked the Russian soldiers with our gases, and then when we saw the poor fellows lying

• Otto Heinrich Warburg:

  Catalytic oxidation in living substances rests upon change of valency in an iron compound which is

• Otto Heinrich Warburg:

  The concentration of the ferment iron in living substance is very small, being in the region of 1 g

• Otto Heinrich Warburg:

  The toxic effect of carbon monoxide on man has nothing to do with inhibition of cellular respiratio

• Otto Heinrich Warburg:

  Green, red, and mixed shades of haemins are known. If magnesium is replaced by iron in chlorophyll,

• Otto Hermann Kahn:

  The deadliest foe of democracy is not autocracy but liberty frenzied.