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SAN FRANCISCO, Nov. 28 (Xinhua) -- Amazon.com on Monday announced that this past Black Friday was the best ever for its Kindle products with consumers buying four times as many Kindle e- readers and tablets as they did last year.According to the online retail giant, its newly launched tablet Kindle Fire was the bestselling product across all of Amazon.com on Black Friday, the day after Thanksgiving, which falls on Nov. 25 this year, when major retailers in the United States traditionally offer big discounts.Kindle Fire is Amazon's answer to Apple's popular iPad. Priced at 199 U.S. dollars, the Amazon product is much cheaper than iPad which starts from 499 dollars.Survey results by research firm ChangeWave Research released days before Black Friday indicated that Amazon is poised to become the No. 2 player in the tablet computer market behind Apple, due to strong demand for Kindle Fire.Amazon said Black Friday sales also showed that a lot of customers were buying multiple Kindles, one for themselves and others as gifts.The trend is expected to continue through this holiday shopping season, Amazon's vice president of Kindle products Dave Limp said in a statement.

BRATISLAVA, Dec. 22 (Xinhua) -- The Slovak Education Ministry on Thursday launched an internet website to provide the general public with digitalized textbooks.According to Education Minister Eugen Jurzyca, the public could access a total of 26 digitalised textbooks, compulsory-reading books and download 65 audio-recordings on the website of eaktovka.sk.The word aktovka means schoolbag in Slovak."We hope that pupils will be able to study even in places where they don't bring their textbooks, such as during the holidays at their grandma's, but also that teachers will have an easier time putting together various textbooks or their sections on, for example, physics or chemistry," said the minister.Jurzyca said he estimated that 92 percent of households with school-age children which own personal computers and 70 percent of those which have access to the internet would visit the website.

BEIJING, Jan. 05 (Xinhuanet) -- Tighter licensing and banning unlicensed food processors are two measures needed to improve the poor quality of cooked food in Guangzhou markets, says a new proposal.The proposal, to be presented to the Guangzhou committee of the Chinese People's Political Consultative Conference, notes that producers of unpacked cooked food currently only need to obtain a food circulation permit.Many of them process food in unlicensed workshops with poor sanitation, and some producers even use substandard materials in food processing.The annual session of the conference opens on Tuesday.Recent tests of unpacked cooked food found that of 100 samples of meat, flour-based food, preserved vegetables, soybean products and algae products, only 38 passed the inspection.No cold dried bean curd or cold algae products passed the tests, which were carried out at seven supermarkets in Guangzhou, Guangdong province, by the city's consumers' commission.Excessive microorganisms were the main reason for failing the tests. Fifty-five samples contained excessive coliform and 12 had golden staph.Meanwhile, in tests of unpacked cooked food at supermarkets in Guangzhou by the city's commerce authority in the third quarter of last year, only 28 of the 71 samples passed the tests. In addition to excessive bacteria, excessive use of coloring agents was also spotted.The situation at other markets, such as wet markets, is more worrying, says the proposal.It also suggests that separate cooked food processing areas be built in local markets, with closer scrutiny over them.Standards concerning the processing, storage and transport of those food products remain unspecified.Some supermarkets, on the other hand, have been lax in selecting suppliers and failed to install protective facilities in shelving the food.Given that a number of government agencies are involved in food safety work, the proposal suggests that a shared information platform be built to prevent loopholes.The food associations should also play a bigger role in supervising food enterprises, it says."Since cooked food goes through the production, transport and shelving steps, it is hard to guarantee the quality. Even packed food has quality problems, not to mention unpacked food," said Ding Honghui, a resident who was shopping at a supermarket in Guangzhou."As far as I know, many government departments are involved in safeguarding food safety. They should strengthen the supervision and work more closely," he said.

WASHINGTON, Dec. 22 (Xinhua) -- The journal Science on Thursday chose the HPTN 052 clinical trial, an international HIV prevention trial as the 2011 Breakthrough of the Year.The study found that if HIV-infected heterosexual individuals begin taking anti-retroviral medicines when their immune systems are relatively healthy as opposed to delaying therapy until the disease has advanced, they are 96 percent less likely to transmit the virus to their uninfected partners. Findings from the trial, first announced in May, were published in the New England Journal of Medicine in August.The study was funded by the U.S. National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health."The HPTN 052 study convincingly demonstrated that anti- retroviral medications can not only treat but also prevent the transmission of HIV infection among heterosexual individuals," said NIAID Director Anthony Fauci in a statement. "We are pleased that Science recognized the extraordinary public health significance of these study results."Science's list of nine other ground-breaking scientific achievements from 2011 include:The Hayabusa Mission: After some near-disastrous technical difficulties and a stunningly successful recovery, Japan's Hayabusa spacecraft returned to Earth with dust from the surface of a large, S-type asteroid. This asteroid dust represented the first direct sampling of a planetary body in 35 years, and analysis of the grains confirmed that the most common meteorites found on Earth, known as ordinary chondrules, are born from these much larger, S-type asteroids.Unraveling Human Origins: Studying the genetic code of both ancient and modern human beings, researchers discovered that many humans still carry DNA variants inherited from archaic humans, such as the mysterious Denisovans in Asia and still-unidentified ancestors in Africa. One study this year revealed how archaic humans likely shaped our modern immune systems, and an analysis of Australopithecus sediba fossils in South Africa showed that the ancient hominin possessed both primitive and Homo-like traits.Capturing a Photosynthetic Protein: In vivid detail, researchers in Japan have mapped the structure of the Photosystem II, or PSII, protein that plants use to split water into hydrogen and oxygen atoms. The crystal-clear image shows off the protein's catalytic core and reveals the specific orientation of atoms within. Now, scientists have access to this catalytic structure that is essential for life on Earth -- one that may also hold the key to a powerful source of clean energy.Pristine Gas in Space: Astronomers using the Keck telescope in Hawaii to probe the faraway universe wound up discovering two clouds of hydrogen gas that seem to have maintained their original chemistry for two billion years after the big bang. Other researchers identified a star that is almost completely devoid of metals, just as the universe's earliest stars must have been, but that formed much later. The discoveries show that pockets of matter persisted unscathed amid eons of cosmic violence.

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