Tags for this video have been changed from 'coal, mining, asphyxiation, amok time sounds' to 'coal, mining, asphyxiation, amok time sounds, h2s, hydrogen sulfide' - edited by BoneRemake

The tap water in Milwaukee has smelled very strongly of hydrogen sulfide (rotten eggs) for at least a decade in my personal experience. You can't drink it without vomiting from the smell. Hydrogen sulfide is poisonous, too. It's a fucking travesty. Whoever's in charge of their government and their municipal water supply ought to be in jail.

But wait, what's this?



With the enclosed description:

From my local drugstore (specialist for paints)
I had some aluminum powder left.

When U mix it together with plaster powder
the aluminum can react with it.
But it needs a high temperature to ignite it.
Here I used a sparkler as a fuse.

I placed the mixture in a tin-can of peanuts.

WOW. Really a bright light,
overmodulating my camera.

This reaction produces an enormous heat,
melting the tin-can into an irregular shaped
piece of junk.
Residual aluminum or plaster cannot be found
after the reaction. The only thing is a slight
odour of rotten eggs
(H2S - hydrogen sulfide).

And another...


This mixture is stronger than thermite use aluminum powder with anhydrous Calcium sulfate(Gypsum heating above 250 °C),reaction start by ignite magnesium ribbon,and the chemical equation is:
3CaSO4+8Al=3CaS+4Al2O3

Tags for this video have been changed from 'TED, Luca, Turin, hydrogen, sulfide' to 'TED, talks, Luca, Turin, smell, vibration, sulfide, sulfur, rotten eggs, coumarin, tonkene' - edited by my15minutes

there are hundreds of symbiotic species of *bacteria* normally found in the human gut, but I never heard of any multicellular symbiont in the GI tract. There are also some extremely common bacteria that are definitely harmful, such as Hydrogen Sulfide producers.

Hey Mr Scientist, riddle me this.

The Nature of Hydrogen:

* Hydrogen is less flammable than gasoline. The self-ignition temperature of hydrogen is 550 degrees Celsius. Gasoline varies from 228-501 degrees Celsius, depending on the grade. When the Hindenburg burned, it took some time before the hydrogen bags were ignited.
* Hydrogen disperses quickly. Being the lightest element (fifteen times lighter than air), hydrogen rises and spreads out quickly in the atmosphere. So when a leak occurs, the hydrogen gas quickly becomes so sparse that it cannot burn. Even when ignited, hydrogen burns upward, and is quickly consumed, as shown in the Hindenburg picture. By contrast, materials such as gasoline and diesel vapors, as well as natural gas are heavier than air, and will not disperse, remaining a flammable threat for much longer.
* Hydrogen is non-toxic. Hydrogen is a non-toxic, naturally-occurring element in the atmosphere. By comparison, all petroleum fuels are asphyxiants, and are poisonous to humans.
* Hydrogen combustion produces only water. When pure hydrogen is burned in pure oxygen, only pure water is produced. Granted, that’s an ideal scenario, which doesn’t occur outside of laboratories and the space shuttle. In any case, when a hydrogen engine burns, it actually cleans the ambient air, by completing combustion of the unburned hydrocarbons that surround us. Compared with the toxic compounds (carbon monoxide, nitrogen oxides, and hydrogen sulfide) produced by petroleum fuels, the products of hydrogen burning are much safer.
* Hydrogen can be stored safely. Tanks currently in use for storage of compressed hydrogen (similar to compressed natural gas tanks) have survived intact through testing by various means, including being shot with six rounds from a .357 magnum, detonating a stick of dynamite next to them, and subjecting them to fire at 1500 degrees F. Clearly, a typical gasoline tank wouldn’t survive a single one of these tests.