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BEIJING, Oct. 18 (Xinhuanet) -- Some seaweeds can kill the reef-building corals around them by emitting anti-coral chemicals, a new study found.The study was published Monday in the online edition of the journal Proceedings of the U.S. National Academy of Sciences (PNAS).The researchers investigated the interactions between eight different species of seaweed and three species of coral growing in the waters nearby the Fiji Islands, and identified a class of anti-coral organic compounds known as terpenes.These chemicals, found on the surfaces of several species of seaweed, can kill the coral by suppressing its photosynthesis.The finding suggests that the living space competition with seaweeds could be a factor of the coral's worldwide decline.Plant-eating fish normally controls seaweed growth on coral reefs, but the populations of these consumers are declining by the overfishing, which eventually resulted in the seaweed's dominant position, according to the researchers.Despite overfishing, pollution and warming oceans are also the contributors to coral's worldwide decline, said Jennifer Smith, a marine ecologist at the University of California, San Diego.

CAPE TOWN, Dec. 15 (Xinhua) -- More people voluntarily get HIV tests in the Western Cape province, an indication of people's rising awareness of the epidemic, authorities said on Thursday.Nearly 11,000 people in the province have been tested over the past 10 days as authorities stepped efforts to halve the number of HIV transmissions over the next few years, according to official figures.Authorities expect more people to be tested when the monthly campaign ends by the end of December.In December last year, 67,111 people were tested.This year's figure is expected to be higher than that of last year, said Western Cape Premier Helen Zille.The campaign, known as Know Your Status and Win, may become a regular feature in the province, said Zille.To encourage more people to take part in the campaign, the province offers awards to several winners by drawing, ranging from 10,000 rand (about 1,250 U. S. dollars) to 50,000 rand (about 6, 250 dollars)."The bottom line is that people respond to incentives," said Zille, who hailed the campaign a success.She said the reality was that those who stubbornly did not want to get tested, were those crucially in need of doing so.While the data still had to be audited, preliminary results indicated a spike in the number of people who were tested.There was also a significant increase at routine testing center that were not part of the campaign, said Zille. Of 22.9 million HIV positive people in sub-Saharan Africa, 5.6 million in South Africa, according to an annual report by UNAIDS.

SAN FRANCISCO, Jan. 13 (Xinhua) -- Google seems to get no blessings for a good start for its New Year resolutions as the Internet search giant got an earful of complaints about its new social search service and felt mortified by a customer-poaching scandal in its Kenyan division.On Tuesday, Google announced "search plus your world" to deliver personalized search results by embedding its social service Google+ to its search engine.Although Google called it as "a beautiful journey begins," competitors and industry watchers said it was "a bad day for the Internet." They accused the company of using its dominant search engine to promote its own social networking site by giving Google+ pages and profiles an artificially prominent position in search results.The search giant first had a public bickering with Twitter which issued a statement on Tuesday saying that "As we've seen time and time again, news breaks first on Twitter. We're concerned that as a result of Google's changes, finding this information will be much harder for everyone."Google on Wednesday made a statement on its official Google+ page, saying that "We're a bit surprised by Twitter's comments because they chose not to renew their agreement with us last summer." The agreement, in which Twitter gave Google access to public tweets, expired last July and was not renewed.Twitter fired back by demonstrating the inefficiency of the new Google search feature. Twitter general counsel Alex Macgillivray tweeted a page of Google search results for the search term "@WWE" which did not include World Wrestling Entertainment's Twitter page, but Google+ page.Macgillivray noted that with 792,642 followers on Twitter compared with 24,900 followers on Google+, WWE's Twitter page is a more relevant social source than Google page and should be presented in Google's search results.Facebook, Google+'s major rival, has been remaining silent this week publicly while its employees criticized Google's moves in public status updates. Several prominent Facebook engineers and directors shared a tech blog about switching default search engine to Microsoft's Bing after "Google broke itself."Facebook has been working with Microsoft to allow Bing to reveal more personalized content.Industry watchers are also crying foul at the privacy and antitrust concerns raised by the new search feature. Search Engine Land, a tech blog closely following Google's news, posted several examples of how Google favors its own social networking service.Industry watchdog Electronic Privacy Information Center told the Los Angeles Times that the group is considering filing a complaint with the U.S. Federal Trade Commission (FTC). The organization once made the complaint that resulted in Google's settlement with the FTC last year that requires the Mountain View, California-based company to submit to external audits of their privacy practices every other year.On Friday, a Kenyan business directory startup Mocality said that Getting Kenyan Businesses Online, a Google-backed initiative to give small businesses free websites for one year, routinely accessed Mocality's database to obtain sales leads.The Search giant's Kenyan division called Mocality customers to pitch Google's alternative service, claiming they have had a partnership with Mocality. Mocality CEO Stefan Magdalinski said there is no such partnership.In a statement sent to the U.S. media, Google said it is " mortified" to learn that a team representing Google improperly used Mocality's data and misrepresented their relationship with the Kenyan company, noting that it "unreservedly apologized to Mocality" and is still investigating the issue.On Monday, BBC revealed that Google admitted profiting from advertisements of illegal websites selling drugs, fake passports and unauthorized tickets for the 2012 Olympics.The ads had been removed by Google after they were brought to the company's attention, but the search giant told BBC that the company "keeps any money it might make from companies advertising illegal services before such ads are removed."Meanwhile, on Thursday, Microsoft announced it has signed a patent licensing agreement with LG Electronics on the manufacturer 's devices running Google Android platform, leaving Motorola Mobility the only major Android-powered device maker that refuses to strike a deal with Microsoft.After the announcement, Microsoft's directors have been taking to Twitter to taunt Google as the two companies had a history of public back-and-forth. But so far, it appeared that Google didn't have time to needle back.

BEIJING, Sept. 30 (Xinhuanet) -- China's space dream took a step closer to reality as the Tiangong-1 module blasted off into the night sky on Thursday from the Gobi Desert.The Long March II-F T1 rocket, under the unmanned module, Tiangong-1, lifted off from the Jiuquan Satellite Launch Center at 9:16 pm as planned.Ten minutes later Tiangong-1 separated from the rocket on its way to orbit, 350 kilometers above Earth. The module deployed its two solar panels, which provide power, at 9:28 pm.At 9:39 pm, Chang Wanquan, chief commander of the manned space program, declared the launch a success as cheers and applause echoed around the command and control center in Beijing.President Hu Jintao and other members of the Standing Committee of the Political Bureau of the Communist Party of China Central Committee went to the center to witness the launch.Premier Wen Jiabao watched at the Jiuquan Satellite Launch Center as the Long March rocket, carrying the space lab, blazed into the night sky.The launch paves the way for China's first rendezvous and docking mission. An unmanned Shenzhou VIII spaceship will be launched in November to dock with Tiangong-1.Two more missions are scheduled for next year and astronauts will board Tiangong-1, which can also function as a space lab.If the mission succeeds, China will become the third country to master spacecraft rendezvous and docking technology following the then Soviet Union and the United States, experts said.Wu Ping, the space program's spokeswoman, said that the ability to rendezvous and dock is vital for building a space station, which China has scheduled for around 2020."A space station cannot be launched in one shot. The modules must be launched separately and then assembled in space," she said.China has invested 35 billion yuan (.47 billion) in total on its manned space program since 1992, when it was approved, she told China Daily.The first phase, from 1992 to 2005, accounted for 20 billion yuan. During this period, China launched six Shenzhou spaceships to set up a system transporting astronauts between Earth and space.In the second phase, from 2005, 15 billion yuan has been spent on projects, including Shenzhou VII and the first rendezvous and docking mission, she explained.Zhou Jianping, chief designer of China's manned space program, said that the space lab and future space station provide a rare platform for conducting experiments that could lead to breakthroughs in the study of materials and biological pharmacy."Experiments made in the microgravity of space can lead to unexpected results," he said.For example, gas and liquid are unable to mix on Earth, but in space they mix naturally, he said."The primary purpose of China's manned space station is to peacefully explore space, and through it, serve mankind," he said.Some have questioned the participation of the military in the program. However, the military has experience in coordinating large-scale requirements that are vital for the program and their involvement reflects international norms, Ministry of National Defense spokesman Geng Yansheng said on Wednesday.He reiterated that China is firmly opposed to the weaponization of space and the program is peaceful.China is now in the second phase of its manned space program. The goal of the program, which has three steps, is to build a 60-ton space station around 2020.The second phase focuses on mastering four key technologies for assembling a space station.The first of these, extravehicular activity, was completed successfully in 2008 after Shenzhou VII was launched.Rendezvous and docking is what is being experimented with. The third technology involves cargo spaceships ferrying supplies to a space lab. The fourth tackles problems concerning the prolonged sustaining of life on a space lab, especially recycling air and water.Besides the manned space program, China launched two lunar orbiters in 2007 and 2010. It plans an unmanned lunar landing around 2013, and returning moon samples in 2017.

WASHINGTON, Oct. 19 (Xinhua) -- A total of 25 people have been killed in 12 U.S. states in a listeria outbreak traced to Colorado cantaloupes, the U.S. Centers for Disease Control and Prevention ( CDC) said Wednesday.The number of people sickened by the tainted cantaloupes has reached 123 in 26 states, with Pennsylvania reporting its first case. One of the ill patients, a pregnant woman, suffered a miscarriage, the CDC said in a telebriefing.The listeria outbreak has been the most deadly one since 1998, according to the CDC.Listeria is a common bacterium that typically causes mild illness in healthy people, but can cause severe illness in older people and those with compromised immune systems. It also can cause miscarriages and stillbirths in pregnant women and severe infections in new babies.The CDC estimates that about 48 million people in the U.S. each year get sick from tainted food, with about 128,000 hospitalized and 3,000 deaths.