Okinawan college develops technique for making apple juice without cutting or peeling apple
Researchers at Okinawa National College of Technology with help from Kumamoto University have developed a machine which uses shockwaves to juice an apple from the inside out. This means that the actual shape of the apple is left intact but the inside is completely liquefied.
The way it works is simple, if you happen to be into the principles of anti-tank weaponry. To take out an armored vehicle, you’d want detonate an explosive from the outside that doesn’t break through the armor but sends a shockwave into it. This causes the inner surface to break apart and creates all kinds of trouble for the people and equipment inside.
In this technique the researchers developed, a force is applied to the target at a speed greater than that of sound creating a shockwave. This shockwave doesn’t damage the outer surface of the target apple but passes through it. Thus, as the wave passes through the apple, it splits into two.
One part of the wave maintains a speed faster than sound and passes right through the apple. The other part of the wave reduces its speed so that it reflects on the inner surface of the apple and bounces around inside of the apple grinding it up like a bull in a china shop. The initial tension of the reflecting wave and the passing moving in opposite directions causes the target start to break down.
The entire process is instantaneous and leaves you with an apple completely juiced on its inside. Aside from it being one of the coolest ways to juice an apple, and the fact that it takes no time at all, juicing an apple with shockwaves is surprisingly efficient too. The energy it would take to juice 100 apples wouldn’t even add up to one yen in electricity costs.
Although successful, the research is still early on. The next hurdle would be to make the equipment more compact for commercial and home use. Still, the researchers feel the applications of this technique are limitless and can be used for instantly breaking foods like rice into powder, threshing, or making meat more chewable for people with dental problems.
Source: Kumamoto University