Scientists pioneer novel model to turn sunlight into fuel
London, Sep 4 : In a breakthrough move, British scientists have used natural sunlight to convert water into hydrogen and oxygen by mixing biological components and man-made technologies.
The team led by academics at the University of Cambridge, used semi-artificial photosynthesis to explore new ways to produce and store solar energy, a finding that could now be used to revolutionise the systems used for renewable energy production.
Their method also managed to absorb more solar light than natural photosynthesis.
"Natural photosynthesis is not efficient because it has evolved merely to survive so it makes the bare minimum amount of energy needed -- around 1-2 per cent of what it could potentially convert and store," said lead author Katarzyna Soko, doctoral student at the University's St. John's College.
Artificial photosynthesis has been around for decades but it has not yet been successfully used to create renewable energy because it relies on the use of catalysts, which are often expensive and toxic. This means it cannot yet be used to scale up findings to an industrial level.
The new model, detailed in the journal Nature Energy, is the first to successfully use hydrogenase and photosystem II to create semi-artificial photosynthesis driven purely by solar power.
The team not only improved on the amount of energy produced and stored, they managed to reactivate a process in the algae that has been dormant for millennia.
"Hydrogenase is an enzyme present in algae that is capable of reducing protons into hydrogen. During evolution this process has been deactivated because it wasn't necessary for survival but we successfully managed to bypass the inactivity to achieve the reaction we wanted -- splitting water into hydrogen and oxygen," Soko explained.
Soko hopes the findings will enable new innovative model systems for solar energy conversion to be developed.
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Ex-Army officer assaulted, robbed at gunpoint by woman he met through matrimonial website
Mathura(UP), Apr 5 (PTI): A retired Army colonel from Haryana has filed a police complaint here, alleging that he was held hostage, assaulted, looted and forced to participate in an "obscene video" at gunpoint with a woman he met through a matrimonial website, police said on Saturday.
The woman from Mathura, who was allegedly in on the plan to rob him, was working with other accomplices, the ex-armyman said in his complaint filed on Thursday.
According to Barsana Station House Officer (SHO) Raj Kamal Singh, Colonel Rajneesh Soni (retired), a resident of Gurugram, reported that he was contacted by a woman from Barsana on a matrimonial website in January. The woman allegedly agreed to marry him, and they began communicating.
The woman allegedly persuaded the colonel to visit Barsana on January 25, requesting that he visit the Radharani temple. When he arrived, she arranged for his stay at a guest house and took him on a tour of the area, including a visit to the temple, the complainant said.
After returning to the guest house, the woman and her accomplices allegedly told the colonel that her brother had been involved in an accident and they needed to leave immediately. They then led him to a waiting car.
"Once outside the town limits, the colonel alleges that he was attacked by the occupants of the car. They seized his phone, physically assaulted him, and forced him to contact relatives and friends to transfer money," the SHO said.
"He was then taken back to the guest house, where he was allegedly forced to participate in obscene videos and photographs at gunpoint. He was threatened that the videos would be made public if he reported the incident," the officer said.
The colonel has alleged that his purse, bag, gold chain, debit card and Rs. 12,000 in cash were stolen from the guest house.
After an unsuccessful attempt at locating the perpetrators himself, the colonel finally reported the incident to the Barsana police two days ago, he said.
"A case has been registered under relevant sections of the BNS and all facts are being investigated. Further action will be taken as per facts found in the investigation," the SHO said.
