The Second Circular Baotou/China August 7～11, 2007 Organized by The Chinese Society of Rare Earths (CSRE) Baotou National Rare-Earth Hi-Tech Industrial Development Zone Honorary Chairman: Xu Kuangdi, President, the C...The Second Circular Baotou/China August 7～11, 2007 Organized by The Chinese Society of Rare Earths (CSRE) Baotou National Rare-Earth Hi-Tech Industrial Development Zone Honorary Chairman: Xu Kuangdi, President, the Chinese Academy of Engineering Chairman: Gan Yong, President, General Institute of Iron & Steel; Chairman of CSRE Vice Chairmen: Zhou Chuandian, Xu Guangxian, Li Dongying, Lin Donglu, Tu Hailing, Yang Jianlin, Li Bingrong International Scientific Advisory Board: Gi-Ya Adachi(Japan), J.C.G. Bünzli(Switzerland), Patrick Burk (USA), Przemyslaw Deren(Poland),Philippe Goldner(France), K. A. Gschneider(USA), Huang Boyun(China), Dariusz Kaczorowski (Poland), Nogami Masayuki(Japan), Ni Jiazuan(China), Wieslaw Strek(Poland),Su Qiang(China), Alessandro Trovarelli(Italy), Wang Zhenxi(China), Yang Yingchang (China), Zhang Guocheng (China)展开更多
Beijing / China August 2-6, 2010 Organized by The Chinese Society of Rare Earths (CSRE) Co-Organized by Peking University (PKU), Roskill Information Services Ltd., Metallurgical Council
The 2nd International Conference on Rare Earth Development and Applications(ICRE’91),which wassponsored by the Chinese Society of Rare Earths,was held at Beijing International Convention Centre fromMay 27 through May...The 2nd International Conference on Rare Earth Development and Applications(ICRE’91),which wassponsored by the Chinese Society of Rare Earths,was held at Beijing International Convention Centre fromMay 27 through May 31,1991.290 scientists attended this conference,among them there were 63 foreign sci-entists.Prof.Yu Zongsen,vice-chairman of the Chinese Society of Rare Earths,presided over the openingceremony.Mr.Xu Daquan,deputy director of the Rare Earth Leading Group of the State Council,vice-minister展开更多
Organized by The Chinese Society of Rare Earths (CSRE) Co-Organized by Peking University (PKU),Roskill Information Services Ltd.,Metallurgical Council of CCPIT,Metal Pages,Baotou
1.Rare Earth Resources in China1.1.Reserves and distributionChina is the country which is the richest in the world in rare earth(RE)resources of allavailable varieties of minerals and their deposits are located in vas...1.Rare Earth Resources in China1.1.Reserves and distributionChina is the country which is the richest in the world in rare earth(RE)resources of allavailable varieties of minerals and their deposits are located in vast areas in China.Reserveshave been estimated at a grand total of 36 million ton,which is 80% of the world(RE)de-posits.The majority of these deposits are concentratedly located in Baiyunebo mine of the展开更多
Objective The aim of this study was to assess the effects of yttrium nitrate on neurobehaviora development in Sprague-Dawley rats. Methods Dams were orally exposed to 0, 5, 15, or 45 mg/kg daily of yttrium nitrate fro...Objective The aim of this study was to assess the effects of yttrium nitrate on neurobehaviora development in Sprague-Dawley rats. Methods Dams were orally exposed to 0, 5, 15, or 45 mg/kg daily of yttrium nitrate from gestation day （GD） 6 to postnatal day （PND） 21. Body weight and food consumption were monitored weekly. Neurobehavior was assessed by developmental landmarks and reflexes, motor activity, hot plate, Rota-rod and cognitive tests. Additionally, brain weights were measured on PND 21 and 70. Results No significant difference was noted among all groups for maternal body weight and food consumption. All yttrium-exposed offspring showed an increase in body weight on PND 21; however, no significant difference in body weight for exposed pups versus controls was observed 2 weeks or more after the yttrium solution was discontinued. The groups given 5 mg/kg daily decreased significantly in the duration of female forelime grip strength and ambulation on PND 13. There was no significant difference between yttrium-exposed offspring and controls with respect to other behavioral ontogeny parameters and postnatal behavioral test results. Conclusion Exposure of rats to yttrium nitrate in concentrations up to 45 mg/kg daily had no adverse effects on their neurobehavioral development.展开更多
The process of development and calibration for the first Moon-based ex- treme ultraviolet （EUV） camera to observe Earth＇s plasmasphere is introduced and the design, test and calibration results are presented. The E...The process of development and calibration for the first Moon-based ex- treme ultraviolet （EUV） camera to observe Earth＇s plasmasphere is introduced and the design, test and calibration results are presented. The EUV camera is composed of a multilayer film mirror, a thin film filter, a photon-counting imaging detector, a mech- anism that can adjust the direction in two dimensions, a protective cover, an electronic unit and a thermal control unit. The center wavelength of the EUV camera is 30.2 nm with a bandwidth of 4.6nm. The field of view is 14.7° with an angular resolution of 0.08°, and the sensitivity of the camera is 0.11 count s-1 Rayleigh-1. The geomet- ric calibration, the absolute photometric calibration and the relative photometric cal- ibration are carried out under different temperatures before launch to obtain a matrix that can correct geometric distortion and a matrix for relative photometric correction, which are used for in-orbit correction of the images to ensure their accuracy.展开更多
Guo Bosheng, senior engineer/professor, is now a member of the Expert Group of the State Council Rare Earth Leading Group, PRC., director of Rare Earth Development Center for Agricultural Technique. He graduated from ...Guo Bosheng, senior engineer/professor, is now a member of the Expert Group of the State Council Rare Earth Leading Group, PRC., director of Rare Earth Development Center for Agricultural Technique. He graduated from Moscow Fine Chemical Industry University in the Sovi-展开更多
China’s rare earth resource dominates othercountries.The rare earth industry is also anemerging industry worldwide.Rare earth materialis a strategic advanced material in the21st century and plays an important role in...China’s rare earth resource dominates othercountries.The rare earth industry is also anemerging industry worldwide.Rare earth materialis a strategic advanced material in the21st century and plays an important role inthe renovation of traditional industries andthe development of high-tech industries.Thedevelopment of the rare earth industry includingresource development and utilization,technical research and industrial restructuringhas therefore received great attention from展开更多
文摘The Second Circular Baotou/China August 7～11, 2007 Organized by The Chinese Society of Rare Earths (CSRE) Baotou National Rare-Earth Hi-Tech Industrial Development Zone Honorary Chairman: Xu Kuangdi, President, the Chinese Academy of Engineering Chairman: Gan Yong, President, General Institute of Iron & Steel; Chairman of CSRE Vice Chairmen: Zhou Chuandian, Xu Guangxian, Li Dongying, Lin Donglu, Tu Hailing, Yang Jianlin, Li Bingrong International Scientific Advisory Board: Gi-Ya Adachi(Japan), J.C.G. Bünzli(Switzerland), Patrick Burk (USA), Przemyslaw Deren(Poland),Philippe Goldner(France), K. A. Gschneider(USA), Huang Boyun(China), Dariusz Kaczorowski (Poland), Nogami Masayuki(Japan), Ni Jiazuan(China), Wieslaw Strek(Poland),Su Qiang(China), Alessandro Trovarelli(Italy), Wang Zhenxi(China), Yang Yingchang (China), Zhang Guocheng (China)
文摘Beijing / China August 2-6, 2010 Organized by The Chinese Society of Rare Earths (CSRE) Co-Organized by Peking University (PKU), Roskill Information Services Ltd., Metallurgical Council
文摘The 2nd International Conference on Rare Earth Development and Applications(ICRE’91),which wassponsored by the Chinese Society of Rare Earths,was held at Beijing International Convention Centre fromMay 27 through May 31,1991.290 scientists attended this conference,among them there were 63 foreign sci-entists.Prof.Yu Zongsen,vice-chairman of the Chinese Society of Rare Earths,presided over the openingceremony.Mr.Xu Daquan,deputy director of the Rare Earth Leading Group of the State Council,vice-minister
文摘Organized by The Chinese Society of Rare Earths (CSRE) Co-Organized by Peking University (PKU),Roskill Information Services Ltd.,Metallurgical Council of CCPIT,Metal Pages,Baotou
文摘1.Rare Earth Resources in China1.1.Reserves and distributionChina is the country which is the richest in the world in rare earth(RE)resources of allavailable varieties of minerals and their deposits are located in vast areas in China.Reserveshave been estimated at a grand total of 36 million ton,which is 80% of the world(RE)de-posits.The majority of these deposits are concentratedly located in Baiyunebo mine of the
基金financially supported by the National Science and Technology Support Program(2012BAK01B00)
文摘Objective The aim of this study was to assess the effects of yttrium nitrate on neurobehaviora development in Sprague-Dawley rats. Methods Dams were orally exposed to 0, 5, 15, or 45 mg/kg daily of yttrium nitrate from gestation day （GD） 6 to postnatal day （PND） 21. Body weight and food consumption were monitored weekly. Neurobehavior was assessed by developmental landmarks and reflexes, motor activity, hot plate, Rota-rod and cognitive tests. Additionally, brain weights were measured on PND 21 and 70. Results No significant difference was noted among all groups for maternal body weight and food consumption. All yttrium-exposed offspring showed an increase in body weight on PND 21; however, no significant difference in body weight for exposed pups versus controls was observed 2 weeks or more after the yttrium solution was discontinued. The groups given 5 mg/kg daily decreased significantly in the duration of female forelime grip strength and ambulation on PND 13. There was no significant difference between yttrium-exposed offspring and controls with respect to other behavioral ontogeny parameters and postnatal behavioral test results. Conclusion Exposure of rats to yttrium nitrate in concentrations up to 45 mg/kg daily had no adverse effects on their neurobehavioral development.
文摘The process of development and calibration for the first Moon-based ex- treme ultraviolet （EUV） camera to observe Earth＇s plasmasphere is introduced and the design, test and calibration results are presented. The EUV camera is composed of a multilayer film mirror, a thin film filter, a photon-counting imaging detector, a mech- anism that can adjust the direction in two dimensions, a protective cover, an electronic unit and a thermal control unit. The center wavelength of the EUV camera is 30.2 nm with a bandwidth of 4.6nm. The field of view is 14.7° with an angular resolution of 0.08°, and the sensitivity of the camera is 0.11 count s-1 Rayleigh-1. The geomet- ric calibration, the absolute photometric calibration and the relative photometric cal- ibration are carried out under different temperatures before launch to obtain a matrix that can correct geometric distortion and a matrix for relative photometric correction, which are used for in-orbit correction of the images to ensure their accuracy.
文摘Guo Bosheng, senior engineer/professor, is now a member of the Expert Group of the State Council Rare Earth Leading Group, PRC., director of Rare Earth Development Center for Agricultural Technique. He graduated from Moscow Fine Chemical Industry University in the Sovi-
文摘China’s rare earth resource dominates othercountries.The rare earth industry is also anemerging industry worldwide.Rare earth materialis a strategic advanced material in the21st century and plays an important role inthe renovation of traditional industries andthe development of high-tech industries.Thedevelopment of the rare earth industry includingresource development and utilization,technical research and industrial restructuringhas therefore received great attention from
