A novel spherical cellulose adsorbent has been prepared by homogeneous graft polymerization of N,N＇-methylenebisacrylamide （MBA） onto cellulose in an ionic liquid, 1-N-butyl-3-methylimidazolium chloride （BMIMC1）,...A novel spherical cellulose adsorbent has been prepared by homogeneous graft polymerization of N,N＇-methylenebisacrylamide （MBA） onto cellulose in an ionic liquid, 1-N-butyl-3-methylimidazolium chloride （BMIMC1）, which was then partially amine methylated through Mannich reaction to get bifunctionalized materials containing both amide and sulphinate moities. Factors affecting the attachment of functional groups were investigated. The adsorbent was characterized by Elemental Analysis （EA）, Fourier Transform Infrared Spectroscopy （FTIR） and Scanning Electron Microscope （SEM）. Cellulose adsorbent was then tested for its potential applications in the reduction adsorption oftrichloroacetic acid （TCAA） from aqueous solutions.展开更多
Based on data in the last 500 years for strong volwtc aedvity and the sununer drought/flood types available in China, the statistical relatons 0f the volcanic eruptions in seasons and several ropons and the drowtood t...Based on data in the last 500 years for strong volwtc aedvity and the sununer drought/flood types available in China, the statistical relatons 0f the volcanic eruptions in seasons and several ropons and the drowtood types and grade index of main wions in China have ban inveStigned. The possible teleconnection bforan flood in the Yangtze hiver and the Huaihe foveL Valleys in 1991 and the volcanic eruption of Mt. Pinatubo in June of 1991 has bam also exathened. It is found that ehas of volcanic eruption in differen ropons in the worid vary on droguood in diffend edons of China, but in some cases the the is absolutely opposite in respect of the summer drowood. Statshcal test shows that in terms of stud confidence levels of the reation for dividing the volcanic eruptions as several ropons are higher than that for volcanic eruPhon in the worid as Whole.展开更多
The photochemical vibrational reaction of UF_6+HCl was investigated by exciting the ternary overtone of 3ν_3 of UF_6 in an intracavity CO laser system.It was found that the rate of the laser-driven reaction was much ...The photochemical vibrational reaction of UF_6+HCl was investigated by exciting the ternary overtone of 3ν_3 of UF_6 in an intracavity CO laser system.It was found that the rate of the laser-driven reaction was much greater than that of the thermal reaction and this photochemical process had an isotopic selectivity.The uranium isotope enrichment factors measured in experiments wore around 1,007 in a single step.展开更多
基金Supported by the Science and Technology Project of Fujian Province Educational Department(JK2013004,JA12040)Science & Technology Development Fund of Fuzhou University(2012-XY-10,2014-XQ-11)the National Natural Science Foundation of China(41372346)
文摘A novel spherical cellulose adsorbent has been prepared by homogeneous graft polymerization of N,N＇-methylenebisacrylamide （MBA） onto cellulose in an ionic liquid, 1-N-butyl-3-methylimidazolium chloride （BMIMC1）, which was then partially amine methylated through Mannich reaction to get bifunctionalized materials containing both amide and sulphinate moities. Factors affecting the attachment of functional groups were investigated. The adsorbent was characterized by Elemental Analysis （EA）, Fourier Transform Infrared Spectroscopy （FTIR） and Scanning Electron Microscope （SEM）. Cellulose adsorbent was then tested for its potential applications in the reduction adsorption oftrichloroacetic acid （TCAA） from aqueous solutions.
文摘Based on data in the last 500 years for strong volwtc aedvity and the sununer drought/flood types available in China, the statistical relatons 0f the volcanic eruptions in seasons and several ropons and the drowtood types and grade index of main wions in China have ban inveStigned. The possible teleconnection bforan flood in the Yangtze hiver and the Huaihe foveL Valleys in 1991 and the volcanic eruption of Mt. Pinatubo in June of 1991 has bam also exathened. It is found that ehas of volcanic eruption in differen ropons in the worid vary on droguood in diffend edons of China, but in some cases the the is absolutely opposite in respect of the summer drowood. Statshcal test shows that in terms of stud confidence levels of the reation for dividing the volcanic eruptions as several ropons are higher than that for volcanic eruPhon in the worid as Whole.
文摘The photochemical vibrational reaction of UF_6+HCl was investigated by exciting the ternary overtone of 3ν_3 of UF_6 in an intracavity CO laser system.It was found that the rate of the laser-driven reaction was much greater than that of the thermal reaction and this photochemical process had an isotopic selectivity.The uranium isotope enrichment factors measured in experiments wore around 1,007 in a single step.
