濮阳东方妇科医院口碑非常好(濮阳东方看男科病很不错) (今日更新中)

WASHINGTON, Nov. 14 (Xinhua) -- Vitamin D levels are significantly lower in patients with recurrent inflammatory spinal cord disease, according to a study published online Monday in Archives of Neurology.Vitamin D is a steroid vitamin that promotes the intestinal absorption and metabolism of calcium and phosphorus. In recent years, low levels of vitamin D have been linked to a variety of autoimmune conditions, including multiple sclerosis (MS). However, the importance of vitamin D in monophasic or recurrent non-MS spinal cord diseases including transverse myelitis and neuromyelitis optica is unknown, according to background information in the article.Transverse myelitis (TM) is a disease of the spinal cord in which there is involvement of the myelin sheath that protects nerve fibers; symptoms include back pain and weakness in the legs. Neuromyelitis optica (NMO) is a disease of the central nervous system that affects the optic nerves and spinal cord.Maureen Mealy, of Johns Hopkins University and colleagues investigated the association between low serum vitamin D levels and recurrent spinal cord disease. They analyzed data on vitamin D levels among 77 patients with monophasic (having only one phase or stage) and recurrent inflammatory diseases of the spinal cord, adjusting for season, age, sex, and race. The study found that vitamin D levels were significantly lower in patients who developed recurrent spinal cord disease."Our findings suggest that there may be an association between lower total 25-hydroxyvitamin D levels in patients with recurrent TM/NMO/ spectrum disorders as compared with their counterparts with monophasic disease," the authors report. They suggest that future studies are needed to further assess the relationship between vitamin D and recurrent spinal cord disease.

BEIJING, Jan. 6 (Xinhua) -- Surveillance data on the size and frequency of earthquakes in Antarctica collected by China's Great Wall Station show that the continent is not earthquake-free, a Chinese seismic expert said Thursday."China's newly-built seismic observatory in Great Wall Station has documented a hundred-odd earthquakes occurring in the region over the past year," said Chang Lijun, a member of China's 28th Antarctic expedition team.The discovery challenges the prevailing notion that the Antarctic has no earthquakes, as many earthquakes have gone undetected due to lack of seismological observation in the region.However, thanks to technological advances, scientists have discovered that the continent is still subject to some minor tremors.Chang, also an associate researcher at China Earthquake Administration's Geophysics Institute, said last year's earthquakes ranged in magnitude from 0.5 to 4, scales which are usually undetectable to common people.The tectonic movements of Antarctica, which sits on two plates that pulled away from each other in the northern Ross Sea between 28 and 40 million years ago, but later converged, fascinate geologists worldwide.At the end of 2010, Chinese scientists set up a new broadband seismic observatory in Great Wall Station, greatly increasing China's ability to measure tremors and tectonic movements on the continent.

KUWAIT CITY, Nov. 27 (Xinhua) -- Two warships from China on Sunday docked at Kuwait's Shuwaikh port to start a five-day official visit to the Gulf Arab emirate.The tour by the destroyer "Wuhan" and the frigate "Yulin" marked the first visit by Chinese naval vessels to Kuwait since the two countries established diplomatic ties 40 years ago."This visit marks a historic occasion and Kuwaiti navy looks forward to future cooperation to improve the relationship and friendship between our two navies," said Colonel Khaled Ahmad Abdallah from Kuwait's navy.The flotilla was part of the ninth Chinese naval convoy to conclude its escort mission in the Gulf of Aden and waters off Somalia.Commander of the flotilla Guan Jianguo hopes the visit would enhance mutual cooperation between the two navies, which in turn would contribute to boosting bilateral relations.The flotilla would visit Oman after its stay in Kuwait.

WASHINGTON, Dec. 20 (Xinhua) -- NASA's Kepler mission has discovered the first Earth-size planets orbiting a sun-like star outside our solar system, the U.S. space agency announce Tuesday.The planets, called Kepler-20e and Kepler-20f, are too close to their star to be in the so-called habitable zone where liquid water could exist on a planet's surface, but they are the smallest exoplanets ever confirmed around a star like our sun, according to NASA.The discovery marks the next important milestone in the ultimate search for planets like Earth. The new planets are thought to be rocky. Kepler-20e is slightly smaller than Venus, measuring 0.87 times the radius of Earth. Kepler-20f is slightly larger than Earth, measuring 1.03 times its radius. Both planets reside in a five-planet system called Kepler-20, approximately 1, 000 light-years away in the constellation Lyra.Kepler-20e orbits its parent star every 6.1 days and Kepler-20f every 19.6 days. These short orbital periods mean very hot, inhospitable worlds. Kepler-20f, at 800 degrees Fahrenheit, is similar to an average day on the planet Mercury. The surface temperature of Kepler-20e, at more than 1,400 degrees Fahrenheit, would melt glass."The primary goal of the Kepler mission is to find Earth-sized planets in the habitable zone," said Francois Fressin of the Harvard-Smithsonian Center for Astrophysics, lead author of a new study published in the journal Nature. "This discovery demonstrates for the first time that Earth-size planets exist around other stars, and that we are able to detect them."The Kepler-20 system includes three other planets that are larger than Earth but smaller than Neptune. Kepler-20b, the closest planet, Kepler-20c, the third planet, and Kepler-20d, the fifth planet, orbit their star every 3.7, 10.9 and 77.6 days. All five planets have orbits lying roughly within Mercury's orbit in our solar system. The host star belongs to the same G-type class as our sun, although it is slightly smaller and cooler.

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