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WASHINGTON, April 3 (Xinhua) -- In the largest study of its kind, researchers from a consortium led by the University of Pennsylvania School of Medicine, the University of Miami, and the Boston University School of Medicine, identified four new genes linked to Alzheimer's disease. The findings appeared Sunday in the current issue of Nature Genetics.Each gene individually adds to the risk of having this common form of dementia later in life. These new genes offer a portal into what causes Alzheimer's disease and is a major advance in the field.The study, conducted by the Alzheimer's Disease Genetics Consortium, reports genetic analysis of more than 11,000 people with Alzheimer's disease and a nearly equal number of elderly people who have no symptoms of dementia. Three other consortia contributed confirming data from additional people, bringing the total number of people analyzed to over 54,000. The consortium also contributed to the identification of a fifth gene reported by other groups of investigators from the United States, the United Kingdom, France, and other European countries.The study is the result of a large collaborative effort with investigators from 44 universities and research institutions in the United States, led by Gerard Schellenberg at University of Pennsylvania."This is the culmination of years of work on Alzheimer's disease by a large number of scientists, yet it is just the beginning in defining how genes influence memory and intellectual function as we age. We are all tremendously excited by our progress so far, but much remains to be done, both in understanding the genetics and in defining how these genes influence the disease process," Schellenberg said.Until recently, only four genes associated with late-onset Alzheimer's have been confirmed, with the gene for apolipoprotein E-e4, APOE-e4, having the largest effect on risk. The Nature Genetics studies add another four -- MS4A, CD2AP, CD33, and EPHA1 -- and contribute to identifying and confirming two other genes, BIN1 and ABCA7, thereby doubling the number of genes known to contribute Alzheimer's disease.

JAKARTA, April 27 (Xinhua) -- Marine scientists will begin conducting an ecological survey in eight locations throughout the resort island in Indonesia's Bali province that could be developed as marine managed areas due to their biodiversity and coral structure, the Jakarta Post quoted an expert as saying on Wednesday.The survey, which will take place from April 29 to May 11, will be carried out by four international scientists and local scientists from universities.Ketut Sarjana Putra, the marine program director with Conservation International Indonesia, said Tuesday the survey was aimed at identifying marine species and their population in each of the eight locations.Selected from 25 potential marine conservation zones, the eight locations are Pulaki and Pemuteran, Lovina, Les Village, Tulamben and Amed, Padangbai, Nusa Penida, Bukit Uluwatu Peninsula and Perancak Beach. "We will go around Bali, starting from Sanur in the south, heading east, then covering the northern and the western areas, then back to the south," Ketut told the daily.The survey is part of a process to build a network of marine protected areas to effectively manage the island's marine and coastal resources to sustain environmental and socioeconomic value and benefits, with priority given to the eight locations.

SYDNEY, May 24 (Xinhua) -- Australian soldiers and contractors in Iraq might have been exposed to blood-borne diseases such as HIV or hepatitis, as staff at Defense's main hospital unit in the Middle East failed to sterilize surgical equipment properly, local media reported on Tuesday.Fairfax newspapers reported the safety breach occurred at the AL Minhad Air Base in the United Arab Emirates over a 19 month period, from February 2009 to August 2010, but soldiers were alerted to the problem only a week ago.A Defense Department memo to troops has warned that soldiers and contractors who passed through the air base hospital near Dubai should ensure they had their blood screened, The Sydney Morning Herald reported."Personnel who underwent a surgical procedure during that period are possibly at risk of acquiring a blood-borne disease," the memo said.However, the health alert says the risk to Australian Defense Force personnel is low, as blood-borne diseases within the force are rare and personnel are vaccinated against hepatitis.The Defense Force's Surgeon-General, Major General Paul Alexander, wrote the "internal procedural issue" was dealt with by the health system and measures were put in place to prevent a repeat of the error.

CANBERRA, May 26 (Xinhua) -- Australian Health Minister Nicola Roxon on Thursday night said she will not be frightened off by the tobacco industry's attempt to lobby Malaysia to oppose the Australian government's proposal for plain packaging of cigarettes.According to ABC News, big tobacco companies have appointed a former United States ambassador to the World Trade Organization ( WTO), Peter Allgeier, to help them fight the Australian federal government's plain packaging plan, which is due to come into effect this year.An email sent to a Malaysian official and obtained by ABC News showed that Allgeier had a meeting with Malaysia's trade minister before, and he has been lobbying a Malaysian administrator to put pressure on Australia over plain packaging.Allgeier's email also stated that "members of the U.S. congress also have written to the Australian Government outlining concerns about the implications of plain packaging for the integrity of Australia's trade commitments."However, Roxon, who said she has not been approached by Malaysia on the issue, said Allgeier's appointment demonstrated just how far big tobacco is prepared to take its fight."But we won't be frightened off because big tobacco is hiring lobbyists or looking at ways to influence the action we're taking, " she told ABC television on Thursday night.The tobacco industry has already spent millions fighting plain packaging, and last year gave 5.2 million U.S. dollars to the Alliance of Australian Retailers (AAR) to fund an advertising campaign against the plan.If the cigarettes law is enforced, Australia will become the first country in the world to ban logos and brand names from cigarette packaging. Health warnings and the kind of graphic pictures will make up the majority of the packaging, while the rest of the packets will be plain olive green.

BEIJING, Jan. 21 (Xinhua) -- China's State Council, or Cabinet, Friday published the newly adopted regulations on expropriation of houses on state-owned land and compensation.The new rules, which took effect upon the issuing, took the place of the 2001 regulations on administration of the housing demolition and relocation in cities.The new rules specifically stated that neither violence or coercion may be used to force homeowners to leave. Nor could measures, such as illegally cutting water and power supplies, be used in relocation work.The new rules also banned land developers' involvement in the demolition and relocation procedures, as well as demolition by local governments without court approval.Moreover, the new regulations ensured fair prices for homeowners by providing that compensation for expropriated homes should be no lower than the sum of the market price of similar properties at the time of an expropriation.The regulations were first reviewed at a State Council executive meeting in December 2007. Later, public opinion was twice sought in 2010 after revisions had been made to the regulations.An executive meeting of the State Council Wednesday gave in-principle approval to the regulations.

来源：资阳报