Posts tagged ‘potassium’
Bananas Emit Antimatter Almost Every 75 Minutes
By Chad Upton
Potassium-40 is a fairly unstable isotope, although the half life is nearly a billion years.
Because bananas have so much of this isotope, there is enough decay to generate one positron (approximately) every 75 minutes.
A positron is basically the opposite of an electron. It has the same mass as an electron, but a positive charge instead of a negative one. It is the electron’s antimatter doppelgänger.
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photo: keepon (cc)
sources: tertiarysource.net, wikipedia (positron, gamma ray)
How to Accelerate and Slow Banana Ripening
I love bananas.
They are a nearly perfect fruit. They taste great. They’re fairly inexpensive. They have their own protective skin and they contain many nutrients such as: vitamins A, B1, B2, B3, B5, B6, B9, C, Calcium, Iron, Magnesium, Phosphorus, Potassium and Zinc.
But, if I had to register a complaint about bananas, it would be their shelf life. Keeping them perfectly ripe is a fine art — one worth mastering.
The first trick is something my wife, Kristen, taught me: don’t buy all your bananas from the same bunch! Pick a couple green ones and a couple that are ripe/near ripe. Then you have some you can eat right away and others that will be ripe when you’re ready for them.
The interesting part is that those two bunches are likely the same age. You assume the less ripe ones are newer, but the food distributors control ripeness. They have large, air tight banana ripening vaults that give them very precise control over banana ripening. They’re usually divided into multiple sections, so bananas can be kept at different stages of ripeness. If they’re selling a lot of bananas, they can accelerate the ripening so they will be ripe when they arrive at the store. If sales are slow, they can slow ripening to avoid waste.
How do they do that? (more…)
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