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SAN FRANCISCO Cheap Men's Nike Air Vapormax 2 Flyknit Laser Orange Black , March 19 (Xinhua) -- Researchers at University of California, Berkeley have discovered that bacteria can repurpose a commonplace enzyme and use it as a scaffold on which to assemble iron atoms into tiny magnets.


With miniature magnets within themselves, the so-called magnetotactic bacteria are the ones able to navigate their environment using Earth's magnetic field as a reference.


Arash Komeili, an associate professor of plant and microbial biology, and his colleagues at UC Berkeley initially found the repurposing of a deactivated enzyme in one species Cheap Nike Air VaporMax Moc 2 University Red Women's , Magnetospririllum magneticum.


However, when the researchers looked throughout the three largest families of magnetotactic bacteria, they found independent occurrences of the same story.


"We really thought that something this unusual would have evolved only once," said graduate student David Hershey. "That just isn't the case. It really just cements how unusual this process is."


A key feature of building magnetic particles is a protease - an enzyme that chews up proteins for recycling - that is deactivated.


The findings, based on X-ray crystallographic images and reported in this week's issue of the journal PLOS Biology Cheap Women's Nike Air VaporMax 2.0 Light Cream , suggest that the scaffold protein, called MamO, may guide iron atoms into position in the magnetite crystal lattice.


It demonstrates how evolution uses existing molecules for new functions.


The process for animals to build minerals is known as biomineralization. Magnetotactic bacteria, for example, snatch iron atoms and assemble them into magnetic nanoparticles Cheap Nike Air Max Plus TN Ultra All White , or tiny crystals of the mineral magnetite, that connect with their nervous system.


"We would like to know how minerals are built in nature since they constitute a fundamental survival strategy for many organisms," Komeili said.


Knowing what is going on with bacteria, researchers may one day use the tricks to build unique magnetic minerals in a test tube that are otherwise not possible.


HARARE, May 23 (Xinhua) -- Zimbabwe Cheap Men's Black Nike Air Max Plus TN Ultra Shoes , which has not had power cuts for the past one and half years, might experience massive load shedding starting next week if the power utility fails to settle its power import bill with Mozambican and South African power utilities.


ZESA Holdings chief executive Josh Chifamba was quoted by the state-run Herald newspaper on Tuesday as saying that the utility was failing to pay 43 million U.S. dollars it owes South Africa's Eskom and Mozambique's Hidroelectrica de Cahora Bassa (HCB) due to foreign currency shortages.


The 43 million U.S. dollars is coming from a payment plan that ZESA struck with the two regional power utilities early this year.


According to the plan, ZESA should have paid 89 million dollars between January and April this year but only managed to pay 46 million dollars.


HCB and Eskom gave ZESA up to May 31, 2017 to pay up the debt failure of which the two utilities would cut off power supplies.


Overally, ZESA owes Eskom 80 million dollars and 40 million dollars to HCB.


Eskom supplies Zimbabwe with 300 megawatts (MW) while HCB provides 50 megawatts.


Zimbabwe requires 1 Cheap Air Max Plus TN Ultra Men's Nike Cargo Khaki ,400 MW daily but is able to produce around 980 MW due to aged power plants.


Chifamba said ZESA was making frantic efforts to secure the money to clear the debt.


"We have been having meetings with the Reserve Bank of Zimbabwe and the Ministry of Finance and Economic Development to find ways of coming out of this. Hopefully this week something will come up because everyone knows the effects of failing to pay," he was quoted as saying.


Zimbabwe has engaged China's Sinohydro to expand Kariba South Power plant by 300 MW. The first 150 MW unit of the expansion project is expected to come on stream by December and the other 150 MW unit by the first quarter of next year.


ZESA says the additional 300MW from Kariba would go a long way in helping the power utility to meet national demand.


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TRIPOLI, June 25 (Xinhua) -- Libya's parliamentary vote ended on Wednesday evening with a low turnout rate, drawing doubts on whether the election will alter the course for the volatile North African country.


As of an hour before polling stations closed at 8:00 p.m. local time (1800 GMT), merely about 400 Cheap Men's Nike Air Max Plus TN Ultra Black Grey ,000 of the 1.5 million registered voters had cast their ballots, according to an electoral official.


The High National Electoral Commission earlier said in a statement that about 98 percent of the polling stations were open, though a few stations in the eastern city of Derna remained closed the whole day due to bomb threats from extremists.


Preliminary results of the vote might be published within a week.


According to Libya's political transition plan, the new parliament, namely House of Representatives Cheap Men's Nike Air Vapormax Plus Burgundy Red , will replace the current interim General National Congress. Then a presidential election will ensue to end the country's transitional phase.


All the 1,714 contestants are registered as independent candidates in the election, as party lists are not allowed under the current electoral law. Some 200 seats, of which 32 are reserved for women, are up for grabs for the candidates.


With the parliamentary elections Cheap Men's Nike Air Vapormax Plus Navy Blue , hopes are raised to break the deadlock between secular groups and Islamists and to bring the country back on the right track after three years of political chaos and a growing unrest since the 2011 turmoil which topple.