武清龙济医院网(天津市龙济网上) (今日更新中)

JINAN, May 14 (Xinhua) -- Chinese scientists said Saturday that they have found a new species of giant theropod dinosaur in the eastern province of Shandong.The new species, described as a close relative of Tyrannosaurus rex (T. rex), has been named "Zhuchengtyrannus magnus". Paleontological experts found it has unique upper jawbones after examining the skull and jawbones discovered in the city of Zhucheng.It was estimated to be about 11 meters long and 4 meters tall, weighing close to 7 tonnes."We discovered two kinds of tyrannosaurus fossils here and the identity of the other one still remains unclear," said Xu Xing, a researcher at the Institute of Vertebrate Paleontology and Paleoanthropology under the Chinese Academy of Sciences."We've named the new genus Zhuchengtyrannus magnus, which means the 'Tyrant from Zhucheng' because the bones were found in Zhucheng," Xu said.The bones were a few centimeters smaller than the similar bones in the largest T. Rex specimen, so there was no doubt that Zhuchengtyrannus was a huge tyrannosaur, Xu said.According to Xu, Zhuchengtyrannus magnus belonged to a specialized group of gigantic theropods called tyrannosaurines which existed in North America and eastern Asia during the Late Cretaceous Period that dated back about 65 to 99 million years.All tyrannosaurs were carnivorous, bipedal animals that generally had small arms and large skulls. Among the tyrannosaurs, the tyrannosaurines were the largest and characterized by having just two fingers on each hand and large powerful jaws to deliver a bone crushing bite. They were likely both predators and scavengers.The fossil quarry in Zhucheng contains one of the largest concentrations of dinosaur bones in the world. At least 10 dinosaur species have been found in three rounds of excavations since the 1960s, including Tyrannosaurus and Hadrosaurs.

SAN FRANCISCO, May 4 (Xinhua) -- Intel Corp. on Wednesday announced that it will mass-manufacture chips using new transistors featuring a three-dimensional (3-D) structure, calling it a technical breakthrough in microprocessors.The 3-D transistor, called Tri-Gate, represents a fundamental departure from the two-dimensional planar transistor structure that has powered computers, mobile phones and other modern electronics, Intel said."Intel's scientists and engineers have once again reinvented the transistor, this time utilizing the third dimension," Paul Otellini, Intel's chief executive officer, said in a statement.Intel on Wednesday also demonstrated a 22-nanometer (nm) microprocessor, codenamed "Ivy Bridge," which will be the first high-volume chips to use the new 3-D transistors.Ivy Bridge is scheduled for high-volume production readiness by the end of this year, the company said.According to Intel, the 3-D transistors enable chips to operate at lower voltage with lower leakage compared to previous transistors, providing up to 37 percent performance increase at low voltage versus the company's 32nm planar transistors.The gain means that the new 3-D transistors are ideal for use in small handheld devices, which operate using less energy to " switch" back and forth, Intel noted.

BEIJING, May 10 (Xinhuanet) -- Researchers from California, Unated States, found that sexual orientation could play a role in cancer and more gay men are reported being cancer survivors than straight men, according to findings in the journal Cancer online Monday.The researchers found that gay men are 1.9 times more likely than straight men to report having had cancer. They also found that lesbian and bisexual women are more than twice as likely as heterosexual women to report fair or poor health after having cancer.Researchers looked at three years of responses to the California Health Interview survey, which included more than 120,000 adults living in the state.Among other health-related questions, participants were asked if they had ever been diagnosed with cancer and whether they identified as gay, lesbian, bisexual, or straight.Out of 51,000 men, about 3,700 said they had been diagnosed with cancer as an adult. While over 8 percent of gay men reported a history of cancer, that figure was only 5 percent in straight men, a disparity that could not be attributed to differences in race, age or income.About 7,300 out of 71,000 women in the study had been diagnosed with cancer, but overall cancer rates did not differ among lesbian, bisexual, and straight women.Ulrike Boehmer, the study's lead author from the Boston University School of Public Health, said higher rates of human immunodeficiency virus (HIV) may be related to the increased risk of cancer in gay men.However, the findings do not necessarily mean that being gay, lesbian or bisexual increases risk of cancer, said the researcher.

WASHINGTON, May 11 (Xinhua) -- Researchers at Brigham and Women 's Hospital (BWH), a teaching affiliate of Harvard Medical School, have identified a human lung stem cell that is self-renewing and capable of forming and integrating multiple biological structures of the lung. This research will be published Thursday in the New England Journal of Medicine."This research describes, for the first time, a true human lung stem cell. The discovery of this stem cell has the potential to offer those who suffer from chronic lung diseases a totally novel treatment option by regenerating or repairing damaged areas of the lung," said the study's corresponding author Piero Anversa, who is also director of the Center for Regenerative Medicine at the hospital.Using lung tissue from surgical samples, researchers identified and isolated the human lung stem cell and tested the functionality of the stem cell both in vitro and in vivo. Once the stem cell was isolated, researchers demonstrated in vitro that the cell was capable of dividing both into new stem cells and also into cells that would grow into various types of lung tissue. Next, researchers injected the stem cell into mice with damaged lungs. The injected stem cells differentiated into new bronchioles, alveoli and pulmonary vessel cells which not only formed new lung tissue, but also integrated structurally to the existing lung tissue in the mice.The researchers define this cell as truly "stem" because it fulfills the three categories necessary to fall under stem cell categorization: first, the cell renews itself; second, it forms into many different types of lung cells; and third, it is transmissible, meaning that after a mouse was injected with the stem cells and responded by generating new tissue, researchers were then able to isolate the stem cell in the treated mouse, and use that cell in a new mouse with the same results."These are the critical first steps in developing clinical treatments for those with lung disease for which no therapies exist. Further research is needed, but we are excited about the impact this discovery could have on our ability to regenerate or recreate new lung tissues to replace damaged areas of the lungs," said Joseph Loscalzo, chair of the Department of Medicine at BWH and co-author.

CHENGDU, Jan. 30 (Xinhua) -- Over the crowds of holiday shoppers in China's big stores this Spring Festival lingers an atmosphere of suspicion.With charges of price deception hanging over the big chains of Carrefour and Wal-Mart and local authorities moving to levy fines, many Chinese -- normally averse to be pinching pennies during the Lunar New Year -- are checking their receipts at the tills.The New Year, which falls on Feb. 3 this year, is normally a time of largesse and excess -- all the more reason why many shoppers feel so betrayed.Customers can be seen recording label prices in notebooks or calculating their final bill on their mobile phones as they walk the aisles.At outlets of Carrefour and Wal-Mart in cities such as Beijing, Shanghai and Chengdu, the check out queues have grown as customers doublecheck prices at the tills."I would never have imagined global firms would do this intentionally and I have to be cautious," said a woman surnamed Wang, after shopping at a foreign-owned supermarket in Chengdu, southwest China's Sichuan Province.With three bulging shopping bags, Wang stood next to the check out to calculate the final bill: "We buy a lot for the New Year celebrations, so I have to be more careful."The official weeklong Spring Festival holiday, which starts Wednesday, is China's closest equivalent to the West's Christmas shopping season, with generous gifts of food, tobacco, liquor and other presents for family and friends.According to the Ministry of Commerce, China's retail sales hit 340 billion yuan (49.8 billion U.S. dollars) during the Spring Festival holiday week last year."The deceptive pricing practices of the two foreign-funded supermarket giants were a total scandal," said Wang. "I have to be careful with the prices and the labels.""Cheating by the supermarkets is the same as stealing. I might have suffered losses as I don't normally check receipts," said a Chengdu man surnamed Li.Wal-Mart (China) Investment Co., Ltd. offered a "sincere apology" to affected customers on Thursday. The company has been cooperating with investigations into the cheating. It has also launched inspections of stores nationwide.Chen Bo, spokesperson for Carrefour China, said Sunday that Carrefour sincerely apologized to Chinese customers for inconvenience and losses caused by pricing irregularities.Carrefour would refund customers five times the difference between the price charged and that on the label. The refund policy would be implemented at Carrefour's 182 outlets in China.The issue is continuing to smoulder on the Internet, with websites asking people to write in with "your experiences of price cheating by the Carrefour."A survey by Sohu, one of China's major web portals, had resulted late Sunday in 8,451 of 9,507 respondents saying they "would not go to Carrefour as it is blacklisted for price cheating.""Carrefour will further strengthen price label management and improve service quality to gain the support and confidence of Chinese customers," said Chen Bo.Carrefour had drawn up short and long-term measures to solve the price label issue, including price inspections, improving and upgrading the price label system, and comprehensive staff training."We will have our special control group conduct frequent and wide-ranging internal price inspections," Chen said.The National Development and Reform Commission (NDRC), China's top economic planner and price regulator, said Wednesday that some Carrefour and Wal-Mart stores in China were involved in deceptive pricing practices.The NDRC ordered local pricing authorities to urge stores to correct their wrongdoing, and pay fines five times the illegal income. It also urged authorities to step up price checks ahead of the Spring Festival.

来源：资阳报