If glass is melted on copper in a reducing hydrogen atmosphere the seal is extremely weak.
Kepler-20e is predicted to have a surface temperature of over 1,000K, and is close enough that any hydrogen atmosphere would have been heated off.
Thus tetravalent protactinium in solutions is obtained by the action of strong reducing agents in a hydrogen atmosphere.
Annealing must be done under a hydrogen atmosphere to prevent outgassing.
On Titan, we have to provide the oxygen, and we burn that in the hydrogen atmosphere.
If the planet was a gaseous giant like Jupiter, some astronomers said, the heat might have long ago driven off all its hydrogen atmosphere.
In the hot hydrogen atmosphere of the sun, this carbon would soon burn to CH4 and be gone.
Her faint hydrogen atmosphere must have been regularly renewed as the spiral streamer whipped across her orbit.
And there are no incendiary effects, not in a hydrogen atmosphere.
This is the same process that is used for pyrolysis under atmospheric pressure, only under hydrogen atmosphere.
