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بهترین سایت شرط بندی ایرانی
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Global Statistics

All countries
695,781,740
Confirmed
Updated on September 26, 2023 9:04 pm
All countries
627,110,498
Recovered
Updated on September 26, 2023 9:04 pm
All countries
6,919,573
Deaths
Updated on September 26, 2023 9:04 pm

Global Statistics

All countries
695,781,740
Confirmed
Updated on September 26, 2023 9:04 pm
All countries
627,110,498
Recovered
Updated on September 26, 2023 9:04 pm
All countries
6,919,573
Deaths
Updated on September 26, 2023 9:04 pm

Laser-sculpted aluminium purifies water with the power of sunlight

City of Cape Town urges people to leave Kataza the baboon alone

Kataza the baboon. Facebook / Baboon Matters The City of Cape Town has asked the public not to feed a baboon that has relocated to Tokai. The baboon, known as Kataza or SK11, is slowly being integrated into the Tokai troop. Video footage, however, shows humans feeding Kataza. The City of Cape Town has requested that Kataza…

Rassie: There are various benefits for SA rugby to go north

As SA Rugby moves to determine which franchises will go to Europe in future, Rassie Erasmus has noted several potential benefits for the local game should that route be followed.The national director of rugby believes the high world rankings of Wales, Ireland and Scotland mean PRO Rugby is competitive and that fans will eventually identify…

A Once-in-a-Century Climate ‘Anomaly’ Might Have Made World War I Even Deadlier

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PICS | Truck driver killed in Pinetown after truck ploughs into several cars

A vehicle that was hit in the accident. A truck driver was killed in a horrific sequence of events following an initial crash in Pinetown. While trying to move the truck after the accident, it appeared to lose control. He died after falling out of the truck which ploughed into several cars and a wall.A truck driver…

42 people in court for R56m police vehicle branding scam

Forty-two people have been implicated in a police car branding scam. Forty-two people have been arrested for their alleged involvement in a police vehicle branding scam. They face a range of charges including corruption, fraud, money laundering, theft and perjury.Of these, 22 are serving police members.Forty-two people are set to appear in the Pretoria Magistrate's Court on…

By Donna Lu

New Scientist Default Image

An artist’s impression of the water-purifying panel

H.M. Cao at University of Rochester

A black panel of aluminium crafted by lasers can purify water when heated by ordinary sunlight. It could eventually be used in drought-stricken areas or regions where clean drinking water is not readily available.

Chunlei Guo at the University of Rochester in New York and his colleagues made the panel using short-pulse lasers on an 3 by 3 centimetre aluminium sheet, creating rows of tube-like microscopic grooves on the surface of the aluminium. On these grooves there are even smaller nanoscale bumps.

The resulting sheet is both black in appearance and attracts water. “If I put a sample [of the aluminium] vertically and put a drop of water on the bottom of the sample, the water will flow uphill against gravity,” says Guo.

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When one end of the panel is placed in dirty water, it draws a thin layer of water upwards, which is then evaporated in the sun. By placing the panel inside a glass box, the team collected the evaporated water for use, separating it from the dirty water with a layer of insulation.

Because of the sheet’s water-wicking abilities, it works regardless of how it is angled, so it can be oriented to always face the direction of the sun.

The team were able to purify water containing heavy metals, detergents and human waste to levels better than the contaminants standards set by the World Health Organisation and US Environmental Protection Agency for drinkable water.

It took 2 hour to obtain around 5 millilitres of purified water, so the team would like to scale up the process to purify greater volumes, and also aim to improve the method’s efficiency by making double-sided panels.

Journal reference: Nature Sustainability, DOI: 10.1038/s41893-020-0566-x

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City of Cape Town urges people to leave Kataza the baboon alone

Kataza the baboon. Facebook / Baboon Matters The City of Cape Town has asked the public not to feed a baboon that has relocated to Tokai. The baboon, known as Kataza or SK11, is slowly being integrated into the Tokai troop. Video footage, however, shows humans feeding Kataza. The City of Cape Town has requested that Kataza…

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