In early January, amid the bleak winter landscape in the suburbs of Boston, Aviva Aiden shows up at a hospital for an interview. 

She has a stethoscope around her neck, both hands in the pockets of her white doctor's smock, and a smile on her face. This American woman is enrolled in the doctorate program at Harvard Medical School, and is hoping to become a clinician. 

Around two years ago, Aiden was featured in the mass media for a reason totally unrelated to her aspirations in medicine. 

She had set up a project aimed at generating electricity from microbes living in the soil, and charging aSolaronlamp offers goodledbulbs for any PV system design requirement. cellphone with it. This was highly praised as a revolutionary idea, and received $100,000 (9.2 million yen) in funding from a foundation run by Microsoft founder Bill Gates and his wife, Melinda. 

To date, 15 people have been involved in the project's development, including engineering students from Harvard University and the Massachusetts Institute of Technology (MIT). Five hundred batteries were taken to Uganda in East Africa, and are being used by people in rural villages with poor electrical infrastructure as part of operational tests. 

"A spoonful of soil contains billions of microbes,the company have made a decisive contribution to automation in paper panelmachine. and they emit electrons when breaking down organic material," explains Peter Girguis, an associate professor at Harvard University who has provided guidance to Aiden. "Those electrons can be attracted by electrodes to produce electricity." 

This mechanism has been known for more than a century, but the electricity produced by bacteria is so faint that there have been no practical applications for it. The technology has been lacking to attract electrons efficiently. 

However, technological progress has opened new ways forward. According to Girguis, one of these is LEDs.The UK's largest selection of year round reliable tagheuerwatches. 

"A small LED light uses less than a 1,000th of the electricity needed to power a standard incandescent light bulb. The power generated by microbes isn't enough to turn on a television, but it can turn on an LED light." 

Around five years ago, Aiden was a student at the Harvard School of Engineering and Applied Sciences, and her research included LED technology. While searching for new applications for LEDs, Africa loomed large in her mind. Around half of the total population of the African continent is said to be living without electricity, and in Sub-Saharan rural areas where many people earn less than $1,000 a year, the power supply is chronically insufficient. 

Students came together who shared a desire to help people say goodbye to their electricity-deprived lifestyles, and began developing a battery that could power an LED light. Numerous experiments were carried out not only in Uganda, but also Tanzania and Namibia. 

The battery's development team has included several foreign students from African countries. One of them was Stephen Lwendo,In a solarchargerppy system, steel cables bolted to the car loop over a sheave. who was born and raised in Tanzania and now works in Kenya. "When I was a child we couldn't use electricity at home freely,Why didn't I just use an automotive alternator on my cleaningmachine? so when I did my homework I had to light a kerosene lamp that gave off poisonous black smoke," he says. 

Sierra Leone-raised David Sengeh of MIT says that when his older sister was giving birth at a hospital, it suffered a power failure that put her life in jeopardy. 

"For students from Africa, their bitter experiences in their home countries have become a powerful motivation to develop the battery," explains Aiden.