The sibling rivalry behind Adidas versus Puma. Searching for the oldest pub in the world. When an elephant lost her leg, he invented a prosthesis for her. A cat composer's mewsic to meow ears. I was stung 1, times for science. This village in India plants trees every time a girl is born. My coworkers unanimously—and enthusiastically—declined. Republicans and Democrats have both made appearances in Glasgow for the giant climate conference.
The quasar J is 13 billion light-years away from Earth. But it still can reveal a lot about our own universe. Brighstoneus simmondsi has a big lump around the nostrils, like a chunky alligator. Sign up to receive Popular Science's emails and get the highlights. With all the hate surrounding durians, it comes as no surprise that many Asian hotels and even our Singapore public transport system ban the fruit.
A panel of trained smellers yes, there are professional sniffers helped researchers narrow down the dizzying smell to two chemicals, ethyl 2S methylbutanoate and 1- ethylsulfanyl ethanethiol. The former smells fruity, while the latter smells like onions.
When combined, however, these two chemicals were indistinguishable from the durian odour. The science behind the malodour lies in a rare amino acid called ethionine. As the tropical ball of spikes ripens over time, its ethionine level increases, and a plant-specific enzyme releases an odorant from ethionine, causing the trademark stink to waft through the air. Knowing how much ethionine is in a durian is actually useful as overconsumption may lead to health risks.
In an experiment, rats subject to high doses of the amino acid developed liver damage and liver cancer. Thankfully, you will need to eat a lot of durians for that to happen.
A 70kg human being will need to binge eat eight times his body weight worth of durians in a day to reach a significant enough level of toxicity. That being said, eating eight times your body weight of anything would probably kill you. Low concentrations of ethionine may, instead, have positive immunomodulatory effects.
Durians are actually superfruits too. The rare amino acid is not all that durians have. This revolting fruit also contains 44 active aromatic compounds. While some of these contribute to the scents of skunks, rotten eggs, rotten cabbages and onions, others contribute to the smell of sweet caramel, honey, and fruity scents. One of the aromatic compounds identified even smells like soup seasoning. Have you ever seen this fruit? Look at what's inside when it's cut in two How to clean and get rid of bad smells in the kitchen 5.
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