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Bracelet shoots antiseptic

27.12.2020

An international team of engineers created the SprayCare wristband. It will disinfect hands and objects where it is not always convenient to get an antiseptic. For example, in public transport, elevator, shop or car. This is reported by Naked Science.

On the body of the device there is a small bottle with an antiseptic and a button that sprays the product. According to the developers, they noticed how often they touch dirty surfaces during the day, and decided to create a simple device that will help them feel safe.

The bracelet is a vial of antiseptic attached to a silicone strap. The size of the device is close to the Apple Watch. Inside there is a sprayer and a pump that starts a single button. After pressing it, the device sprays antiseptic on any surface within 3 seconds at a distance of up to 1,5 m.

The antiseptic in the bottle is enough for about 40 applications, after which the person will be able to add the desired product (if it is not very thick). In addition, the bottle can be filled with insect repellent, perfume or essential oil - depending on the need. So it will remain relevant even after the pandemic. Engineers suggest using it as a self-defense tool: just change the antiseptic for pepper spray liquid.

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The cleanest place on earth 02.06.2020

Scientists from Colorado State University have found a region of the atmosphere on Earth that has not been affected by human activity.

The study found that the cleanest air on Earth can be found in the Southern Ocean south of 40 degrees south latitude. A group of scientists have discovered that the planetary boundary layer (the lower layer of the planet's gaseous envelope - ed.), which feeds the clouds over the Southern Ocean, is absolutely clean. No aerosols were found there, which are formed as a result of anthropogenic activity and are carried by the wind over great distances.

According to scientists, weather and climate are complex processes that bind together every part of the world, and therefore it is so difficult to find a corner on Earth that is not affected by people. Creidenweiss and his team hypothesized that the air over the remote Southern Ocean surrounding Antarctica would be the least affected by people and dust from the continents.

The samples were collected during field research, the ship with scientists passed south from Tasmania to the Antarctic ice edge. Air samples were taken in the marine boundary layer, which has direct contact with the ocean.

With the help of DNA sequencing, it turned out that the microorganisms in the air samples were local, brought there from the surrounding ocean. The air over the Southern Ocean was so pure that the researchers did not even have enough DNA to work with.

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