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ABOARD LIAONING AIRCRAFT CARRIER Womens UGG Classic Sheepskin Tall Boots 5815 Chestnut Outlet , July 13 (Xinhua) -- A flotillaincluding China's aircraft carrier Liaoning embarked on a newtraining mission upon arrival at an unidentified sea areaThursday.

The training, a latest effort to explore the oceangoing combattraining practice, is expected to strengthen coordination among thevessels in the naval formation, improve the skills of crew andpilots in different marine conditions Womens UGG Classic Sheepskin Tall Boots 5815 Black Sale , and enhance the commandcapability.

The aircraft carrier has just concluded a five-day visit to theHong Kong Special Administrative Region (HKSAR) to celebrate the20th anniversary of the People's Liberation Army (PLA) beingstationed in the HKSAR.

The PLA Hong Kong Garrison has been responsible for the defenseof Hong Kong since its return to the motherland in 1997.Enditem

CHICAGO, Jan. 2 (Xinhua) -- A sleepless night causes levels of the Alzheimer's protein amyloid beta to rise faster than the brain's waste-disposal system can remove it, a study of Washington University School of Medicine in St. Louis found.

Persistent high levels of the protein can set off a cascade of brain changes leading to dementia.

Researchers at the university studied eight people aged 30 to 60 with no sleep or cognitive problems. The participants were assigned randomly to one of three scenarios: having a normal night's sleep without any sleep aids; staying up all night; or sleeping after treatment with sodium oxybate, a prescription medication for sleep disorders.

Each scenario occurred during 36 hours of monitoring Wholesale Womens UGG Classic Sheepskin Tall Boots 5815 Sand , starting in the morning and continuing through the afternoon of the following day. The researchers took samples of the fluid that surrounds the brain and spinal cord every two hours to monitor how amyloid beta levels change with time of day and tiredness.

All eight participants returned four to six months later to undertake a second scenario, and four people completed all three.

Amyloid beta levels in sleep-deprived people were 25 to 30 percent higher than in those who had slept the night through. After a sleepless night, amyloid beta levels were on par with the levels seen in people genetically predisposed to develop Alzheimer's at a young age.

"This study is the clearest demonstration in humans that sleep disruption leads to an increased risk of Alzheimer's disease through an amyloid beta mechanism," said senior author Randall Bateman Cheap Womens UGG Bailey Button Sheepskin Short Boots 5803 Chestnut , professor of neurology at Washington University in St. Louis.

One sleepless night probably has no effect on overall risk of Alzheimer's. Researchers are much more concerned about people with chronic sleep problems.

When amyloid beta levels in the brain are persistently high, the protein is more likely to start collecting into plaques. Such plaques damage nearby neurons and can trigger a cascade of destructive brain changes. The brains of people with Alzheimer's disease are dotted with such plaques.

In the study, people who took sleep medication had levels of amyloid beta no lower than people who had slept normally.

An estimated 50 million to 70 million American adults struggle to get a good night's sleep. Some have medical conditions such as sleep apnea.

Further studies are needed to determine whether improving sleep in people with sleep problems can reduce amyloid beta levels and risk of Alzheimer's disease.

The study has been published online in Annals of Neurology.

Chinese player Wu Di returns the ball to Belarusian player Uladzimir Ignatik during the 1st round of the qualification of the French Open in Paris, France on May 22 Discount Womens UGG Bailey Button Sheepskin Short Boots 5803 Navy , 2017. Wu Di was defeated 0 to 2. (XinhuaJean-Marie Hervio)

PARIS, May 22 (Xinhua) -- Chinese tennis player Wu Di's quest for a main draw berth in 2017 French Open was dealt with a huge blow as he lost 6-1, 6-2 to Uladzimir Ignatik of Belarus in men's first-round qualifiers here on Monday.

In the one-hour matchup, Wu Cheap Womens UGG Bailey Button Sheepskin Short Boots 5803 Sand , positioned 217th on ATP singles rankings, was overshadowed by his opponent from the very beginning, as 149th-ranked Ignatik broke in the first game.

Although Wu made a quick response to finish his own break in the second game, he could not withstand Ignatik's powerful serve. The Belarusian outscored Wu 8-1 in aces Womens UGG Bailey Button Sheepskin Short Boots 5803 Black Clearance , and had much advantage in his first serve made with 76 percent compared with Wu's 56 percent.

Ignatik bagged the following five games for a 6-1 victory in the first set.

Wu made a bit improvement in the second set to hold his first two serves, while being broken in the sixth for a 4-2 deficit.

Too many unforced errors proved to be a huge obstacle for Wu, whose poor volley saw him down at 6-2 in the second set to say goodbye to the Grand Slam tournament.

128 men's qualifers fight for 16 berths in the main draw of Roland Garros from Monday to Friday, with 12 women's main draw spots will come out from 96 qualifiers through the contest from Tuesday to Friday.

Tourists visit lily garden in SW China's Guizhou

In pics: scenery of cliffs in Guoliang Village

Cheongsam lovers give performance in east China

Pic story: Technique of making Jianzhan porcelain

Weekly choices of Xinhua photos (May 15 - May 21)

First Giants Parade held in Leuven Womens UGG Bailey Button Sheepskin Triplet Boots 1873 Black Outlet , Belgium

China succeeds in mining combustible ice in South China Sea

In pics: road on cliffs of Taihang Mountain in N China

HONG KONG, May 29 (Xinhua) -- The gold price in Hong Kong closed at 11,772 Hong Kong dollars (about 1,510.39 U.S. dollars) per tael on Monday Womens UGG Bailey Button Sheepskin Triplet Boots 1873 Chestnut Online , up 34 Hong Kong dollars from the previous trading day, according to the Chinese Gold and Silver Exchange Society.

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