Germs on Banknotes
People in different countries use different types of : yuan in China, pesos in Mexico, pounds in the United Kingdom, dollars in the United States, Australia and New Zealand. They may use currencies, but these countries, and probably all countries, still have one thing in common1: Germs on the banknotes.
Scientists have been studying the germs on money for well over2 100 years. At the turn of the 20th 3 century, some researchers began to suspect that germs living on money could spread disease.
Most studies of germy money have looked at the germs on the currency 4 within one country. In a new study, Frank .
Vriesekoop3 is a microbiologist at the University of Ballarat in Australia4. He led the study, which compared the germ from 10 nations. The scientists studied 1,280 banknotes in total; all came from those businesses often rely on cash. Overall, the Australian dollars hosted the fewest live bacteria ---- no more than 10 per square centimeter. Chinese yuan had the most ---- about 100 per square centimeter. Most of the germs on money probably would not cause harm.
What we call "paper" money usually isn't made from paper. The U. S. dollar, for example, is printed on fabric that is to print their money. Some of the currencies studied , such as the American dollar were made from cotton. Others were made from polymers. The three 11 currencies with the lowest numbers of bacteria were all printed on polymers. They included the Australian dollar, the New Zealand dollar and some Mexican pesos.
The other currencies were printed on fabric made 12 mostly of cotton. Fewer germs lived on the polymer notes. This to understand how germs live on money-----and whether or not we need to be concerned. Vnesekoop is now starting a study the amounts of time bacteria can stay alive on different types of bills.
Whatever Vriesekoop finds, the fact remains: Paper money harbors germs We should wash our 15 hands after touching it; after all5, you never know where your money 's been. Or what's living on it.
第十篇 Chicken Soup for the Soul：Comfort Food Fights Loneliness
Mashed potatoes, macaroni and cheese, may be bad for your arteries． according to a study in Psychological ．The study focuses on "comfort food" and how it makes people feel． "For me 3 personally , food has always played a big role in my family," says Jordan Troisi, a graduate student at the University of Buffalo, and lead author on the study．The study came out of the research program of his co-author Shira Gabriel． non-human things that may affect human emotions．Some people reduce loneliness by bonding with their TV show, building virtual relationships with a pop song singer or looking at pictures of loved ones． making people
think of their nearest and dearest. In one experiment, in order to make 7 participants feel lonely, the researchers had them write for six minutes about a fight with someone close to them．Others were given an emotionally neutral writing wrote about the experience of eating a comfort food and others wrote about eating a new food． ． Writing about a fight with a close person made people feel lonely．But people who were generally 11 secure in their relationships would feel less lonely by writing about a comfort food．"We have found that comfort foods are consistently associated with those close to us．"says Troisi．"Thinking about or consuming these foods later then serves as a reminder of those close others． of eating food with chicken soup in the lab made people think more about relationships, but only if they considered chicken soup to be a comfort food．This was a question they had been asked long before the experiment, along with many other questions, so they wouldn't remember it. Throughout everyone's daily lives they with others," Troisi says．"Comfort food Can be an easy remedy for loneliness．
第十一篇 Climate Change Poses Major Risks for Unprepared Cities