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Betül Kaçar

👤 Speaker
1813 total appearances

Appearances Over Time

Podcast Appearances

StarTalk Radio
How Did Life Begin? with Betül Kaçar

We rely on nitrogen.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

ATP needs nitrogen, our DNA needs nitrogen, so it's essential to life as we know it.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

And we think that it is as old as about 3 billion years.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

So the first billion years of life didn't have biological fixation of nitrogen.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

So what do we mean by that?

StarTalk Radio
How Did Life Begin? with Betül Kaçar

Luckily, there's a lot of nitrogen in the atmosphere.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

Lots.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

But it is not readily available to our cells.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

It cannot enter our cells as easily.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

It needs to be transformed.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

It's a triple bond.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

It's very, very strong.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

So life invented it.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

a way to break this bond and turn nitrogen into a form that is ammonia, that is available for life.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

And that's been doing that for three billion years, relying on a single enzyme.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

So if that enzyme is ruined, the whole show collapses.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

Or so we thought.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

So we created an artificial way of fixing nitrogen.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

That's the Haber-Bosch process, which is insane amount of energy.

StarTalk Radio
How Did Life Begin? with Betül Kaçar

About 2% of world's entire energy consumption goes through the production of artificial ammonia through artificial nitrogen fixation process using Haber-Bosch.