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How to evaluate purchased products for contamination by harmful bacteria? In the near future, an inexpensive smartphone device will appear for this, which will give it the ability to detect these bacteria. The development of the gadget involved scientists at Amherst University in Massachusetts. The research team is led by food expert Dr. Lily Hee. Scientists have already developed a chip containing 3-MBPA acid molecules, which, like a magnet, attract bacteria. The chip is immersed in the test product, after which it is washed with a concentrated buffer liquid, which washes away the sugar, fats and proteins contained in the product, while leaving all the bacteria in place. Then the chip is placed in a simple light microscope, designed to work with smartphones. A special application counts the number of bacteria on a chip. The device is very sensitive and can detect even a small number of bacterial cells, for example, 100 units per 1 milliliter of solution.
Every day we see drones of various types and purposes, which are used for entertainment and commercial purposes. However, no matter what they are used for, they all have a similar disadvantage, and this is a limited flight time. For the most part, many drones are able to stay in the air for only about 25 minutes, after which their batteries are discharged. This means that the use of drones for a long period of time is impossible. However, an American startup called Impossible Aerospace claims that their US-1 drone will be able to fly for up to 2 hours. The company also claims that the drone can charge its battery up to 75% in just 45 minutes, which means that users will not have to wait too long to lift their drone into the air again. With an approximate flight time of 90 minutes to 2 hours, a recharge of up to 75% in 45 minutes means that users can get at least one hour of extra time. The company claims that they are able to achieve this figure due to the fact that it has focused on batteries.
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Scientists at the University of Texas located in Austin, as well as Nanjing University in China, have come up with an interesting technique. It allows you to use your smartphone to determine if the food is spoiled. To identify spoiled products, a special NFC tag is used. It is equipped with a sensor that detects biogenic amines, which are responsible for the characteristic “flavor” of stale meat. Testing the labels in the laboratory, they were placed near raw meat of fish and chicken for 20 hours at a temperature of 30 degrees Celsius. Sensors were able to detect the smell of decomposition, elusive human nose. Having determined the decomposition, the NFC-tag was activated. And then she sent a warning to the application installed in the smartphone.