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Door buttons in many shapes, finishes and styles. For the most part, these differences are just a matter of taste, with some variations between a look or another according to the preference of an individual in the design. But for the material the door button is made of brass, either, chromium, stainless steel or plastic choice can have serious consequences for health.

Indeed, copper and its alloys, especially brass, have been found to be self-disinfection. The surfaces that are frequently affected, from carts to shop elliptical machine at your gym, often crawling with bacteria. This applies to the door handles, too, of course. (A study revealed that Starbucks door handlesMore bacteria transported a subway pole of New York.). However, when the door handles are made of brass or copper, a chemical reaction helps to reduce this accumulation of germs upwards.

All this comes down that scientists call "the oligodynamic effect," the term when brass metal ions have a toxic effect on living cells and bacteria, even at low concentration. Asa study From the National College of Kathmandu to Nepal found, "the protein denature the metal of the target cells by binding to reactive groups resulting in their precipitation and inactivation. The high affinity of cellular proteins for metal ions causes the death of cells due to the cumulative effects of the ion in the cells ".

Thus, the brass effectively sterilizes the bacteria from all hands to turn the buttons.

Of course, manufacturers do not necessarily know when they started using brass to make door handles. Brass is durable and corrosion resistant, making it an interesting option from the beginning in the door handle jack, when the buttons werefirst created by soldering two pieces of metal, then flowing starting around 1846. While the brass remains the most common type of metal used for door handles, stainless steel and plastic have increased more and more popular (and Cheaper) as a material of choice and can be bad news for the return cut on the spread of germs.

Professor Bill Keevil, Head of the Microbiology Group at the University of Southampton,Explain Business Insider, "On stainless steel surfaces These bacteria can survive for weeks, but on the copper surfaces they die in minutes," drawing onresults He and his team published in the molecular genetic journal of bacteria. "We live in this new world in stainless steel and plastic, but maybe we should come back to the use of brass more instead. And for more amazing facts about living germs around us, do not miss these20 shocking facts about your room hotel.

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