Reported in this paper are the Nd isotopic compositions of the pre-Sinian and Sinian-Cambrian sedimentary rocks in the Xiushui area,Jiangxi Province.Significant differences are noticed between them in their Nd isotopi...Reported in this paper are the Nd isotopic compositions of the pre-Sinian and Sinian-Cambrian sedimentary rocks in the Xiushui area,Jiangxi Province.Significant differences are noticed between them in their Nd isotopic dompositions.As for the pre-Sinian lightly metmorphozed sedimentary rocks,^143Nd/^144Nd=0.512000-0.512214,CNd(T)=-8.04-9.99,and TDM=18332426Ma are suggested for the Sinian-Cambrian sedimentary rocks .These differences would reflect the diversity of material source for the sedimentary rocks deposited before and after the Sinian period.Mantle material ap-pears to have been involved in the formation of the pre-Sinian sedimentary rocks while the post-Sinian sedimentary rocks are composed mainly of recycled detritus from the continental crust.展开更多
Objective：To study the relationship between plasma treatment time acrylic resin denture material in the size of 2 mm × 10 mm × 10 mm. and efficacy. Methods：Test specimens were prepared from an Plasma treat...Objective：To study the relationship between plasma treatment time acrylic resin denture material in the size of 2 mm × 10 mm × 10 mm. and efficacy. Methods：Test specimens were prepared from an Plasma treatment was carried out on the surface of Polymethyl methacrylate（PMMA） at different time. XPS studies, IR spectra studies and measurement of wetting angle were performed. Results： XPS showed the peak corresponding to C-O getting higher as the treatment proceeded, however at 120 seconds, the peak did not increase any longer and partly crossed with the peak at the duration of 60 seconds. IR spectra showed the wave corresponding to C-H was reduced as O2-plasma treatment proceeded, and then changed little, Wetting angle initially decreased dramatically, however, as the reaction proceeded, wetting angle increased slightly. Conclusion：Equilibrium was reached for introducing oxygen-containing groups and changing of C-H. As the treatment proceeded, wetting angle increased slightly.展开更多
Crystal defects,disorder,phase by high resolution such as grain boundary.dislocation,stacking boundary and surface of granule were examined electron microscope(HREM)in superconducting Tl_(2)Ba_(2)Ca_(2)Cu_(3)O_(x).Som...Crystal defects,disorder,phase by high resolution such as grain boundary.dislocation,stacking boundary and surface of granule were examined electron microscope(HREM)in superconducting Tl_(2)Ba_(2)Ca_(2)Cu_(3)O_(x).Some possible effects of the defects on the sample's properties viz.,Jc and Tc are discussed.展开更多
The original rock formation age and metamorphic history of Chencai Group are one of the keys to understanding tectonics and early crustal evolution of Zhejiang and Fujian provinces. For the purpose of obtaining the or...The original rock formation age and metamorphic history of Chencai Group are one of the keys to understanding tectonics and early crustal evolution of Zhejiang and Fujian provinces. For the purpose of obtaining the original rock formation age and metamorphic age, Sm-Nd and Rb-Sr isotopic compositions of metamorphic rocks and minerals were determined. Although only the metamorphic age was obtained, Sm-Nd isotopic system resetting among minerals under amphibolite facies metamorphism was discovered, which is of significance for Sm-Nd chronology of metamorphic rocks.展开更多
Cenozoic basaltic volcanic rocks of various ages from the Tertiary to Pleistocene in Jiangsu, Anhui and Shandong are widely distributed. In the Paleocene they are mainly tholeiitic eruption and in the Neogene alkalic ...Cenozoic basaltic volcanic rocks of various ages from the Tertiary to Pleistocene in Jiangsu, Anhui and Shandong are widely distributed. In the Paleocene they are mainly tholeiitic eruption and in the Neogene alkalic basalt. In the Pleistocene, they consist of alkalic basalt, basanite展开更多
基金This project was financially supported by the National Natural Science Foundation of China.
文摘Reported in this paper are the Nd isotopic compositions of the pre-Sinian and Sinian-Cambrian sedimentary rocks in the Xiushui area,Jiangxi Province.Significant differences are noticed between them in their Nd isotopic dompositions.As for the pre-Sinian lightly metmorphozed sedimentary rocks,^143Nd/^144Nd=0.512000-0.512214,CNd(T)=-8.04-9.99,and TDM=18332426Ma are suggested for the Sinian-Cambrian sedimentary rocks .These differences would reflect the diversity of material source for the sedimentary rocks deposited before and after the Sinian period.Mantle material ap-pears to have been involved in the formation of the pre-Sinian sedimentary rocks while the post-Sinian sedimentary rocks are composed mainly of recycled detritus from the continental crust.
基金This work was supported by Science Fund of Department of Education of Jiangsu Province(06KJD320125)
文摘Objective：To study the relationship between plasma treatment time acrylic resin denture material in the size of 2 mm × 10 mm × 10 mm. and efficacy. Methods：Test specimens were prepared from an Plasma treatment was carried out on the surface of Polymethyl methacrylate（PMMA） at different time. XPS studies, IR spectra studies and measurement of wetting angle were performed. Results： XPS showed the peak corresponding to C-O getting higher as the treatment proceeded, however at 120 seconds, the peak did not increase any longer and partly crossed with the peak at the duration of 60 seconds. IR spectra showed the wave corresponding to C-H was reduced as O2-plasma treatment proceeded, and then changed little, Wetting angle initially decreased dramatically, however, as the reaction proceeded, wetting angle increased slightly. Conclusion：Equilibrium was reached for introducing oxygen-containing groups and changing of C-H. As the treatment proceeded, wetting angle increased slightly.
文摘Crystal defects,disorder,phase by high resolution such as grain boundary.dislocation,stacking boundary and surface of granule were examined electron microscope(HREM)in superconducting Tl_(2)Ba_(2)Ca_(2)Cu_(3)O_(x).Some possible effects of the defects on the sample's properties viz.,Jc and Tc are discussed.
基金Project supported by the National Natural Science Foundation of China.
文摘The original rock formation age and metamorphic history of Chencai Group are one of the keys to understanding tectonics and early crustal evolution of Zhejiang and Fujian provinces. For the purpose of obtaining the original rock formation age and metamorphic age, Sm-Nd and Rb-Sr isotopic compositions of metamorphic rocks and minerals were determined. Although only the metamorphic age was obtained, Sm-Nd isotopic system resetting among minerals under amphibolite facies metamorphism was discovered, which is of significance for Sm-Nd chronology of metamorphic rocks.
文摘Cenozoic basaltic volcanic rocks of various ages from the Tertiary to Pleistocene in Jiangsu, Anhui and Shandong are widely distributed. In the Paleocene they are mainly tholeiitic eruption and in the Neogene alkalic basalt. In the Pleistocene, they consist of alkalic basalt, basanite
