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History Acetanilide was the first aniline derivative serendipitously found to possess analgesic as well as antipyretic properties, and was quickly introduced into medical practice under the name of Antifebrin by A. Cahn and P. Hepp in 1886. But its unacceptable toxic effects, the most alarming being cyanosis due to methemoglobinemia, prompted the search for less […]
Air is a mixture of gases, mainly composed of nitrogen, oxygen. Carbon dioxide and water vapor, usually in the air of various gas molecules are stable, neutral, not charged. However, the nature of cosmic radiation, ultraviolet radiation and lightning, wind, plants and result in ambient air ionization, generates negative ions, also called air ions. NAI […]
Since April of this year, as Apple iPad tablet on the first month in the U.S. sell 100 million units, and the Sony network terminal products to market, Tablet PC market has become more than ever before are hot. Many computer makers have introduced or plan to launch Tablet PC products abroad, such as HP, […]
Ministry of Information Industry said that as of February 12, suffered snow disasters in south China region and conditional regions above the county town has basically returned to normal communication, communication repair work is deep into the town the following projects in remote mountain villages. However, because the disaster relief funds to continue to increase […]
Of: Ministry of Industry and Information Technology Research Institute of Telecommunications Communicate Standards Institute Zhang Haiyi Business network on the transmission network demand Comprehensive information services and multimedia services in the proportion of business operators continue to improve, encourage people to demand changes in working life, the business diversified telecommunications network to accelerate the trend […]
