The phenomenon of cytogenetic adaptive and cross-adaptive response induced by low dose irradiation and chemical mutagen in mice is described. We found, firstly, that adaptation can be induced by acute low dose Xirradi...The phenomenon of cytogenetic adaptive and cross-adaptive response induced by low dose irradiation and chemical mutagen in mice is described. We found, firstly, that adaptation can be induced by acute low dose Xirradiation (0-100 mGy). Secondly, a cross-adaptation can occur between X-irradiation and mitomycin C (MMC). And finally, mice pre-exposed to chronic low dose rate￣(60)Co-Gamma irradiation (0-226.0 mGy/day) are less susceptible to chromosome aberration induced by subsequent acute higher Xirradiation. Therefore, our data suggest that radioadaptive response depends on dose, dose rate and time interval. Possible mechanisms are also discussed.展开更多
OS/2或Microsoft Windows应用框架其实就是封装和抽象API关键部分的C++类库。Borland C++4.5和Database Tools与Object Windows Library(OWL)2.5一起销售,而Microsoft Visual C++ 2.0则突出了Microsoft Foundation Classes(MFC) 3.0。(M...OS/2或Microsoft Windows应用框架其实就是封装和抽象API关键部分的C++类库。Borland C++4.5和Database Tools与Object Windows Library(OWL)2.5一起销售,而Microsoft Visual C++ 2.0则突出了Microsoft Foundation Classes(MFC) 3.0。(Microsoft的16位Visual C++ 1.51仍与老的MFC 2.5一起销售。) 这两个应用框架加快了Windows程序的开发,并使你能增加诸如OLE 2.0这样的功能,这些功能可以使你几乎不用自己编码。展开更多
As one of the world's most active intracontinental mountain belts, Tien Shan has posed questions for researchers regarding the formation of different tectonic units and active shallow seismicity. Here, we used a h...As one of the world's most active intracontinental mountain belts, Tien Shan has posed questions for researchers regarding the formation of different tectonic units and active shallow seismicity. Here, we used a huge data set comprising of 7094 earthquakes from local, regional and teleseismic seismic stations. We used waveform modeling and multi-scale double-difference earthquake relocation technique to better constrain the source parameters of the earthquakes. The new set of events provided us with better initial earthquake locations for further tomographic investigation. We found that reverse-faulting earthquakes dominate the whole study area while the fault plane solutions for earthquakes beneath the northwestern Tarim Basin and the Main Pamir Thrust are diverse. There is a low-velocity anomaly beneath Bashkaingdy at depth of 80 km, and high-velocity anomalies beneath central Tien Shan at shallower depths. These observations are the keys to understand the mechanism of Tien Shan's formation because of Tarim Basin northward and Kazakh Shield's southward subduction in the south and north respectively. Velocities beneath western Tien Shan are relatively high. We thus infer that the Western Tien Shan is relatively less deformed than the eastern Tien Shan primarily due to a relatively brittle mantle.展开更多
文摘The phenomenon of cytogenetic adaptive and cross-adaptive response induced by low dose irradiation and chemical mutagen in mice is described. We found, firstly, that adaptation can be induced by acute low dose Xirradiation (0-100 mGy). Secondly, a cross-adaptation can occur between X-irradiation and mitomycin C (MMC). And finally, mice pre-exposed to chronic low dose rate￣(60)Co-Gamma irradiation (0-226.0 mGy/day) are less susceptible to chromosome aberration induced by subsequent acute higher Xirradiation. Therefore, our data suggest that radioadaptive response depends on dose, dose rate and time interval. Possible mechanisms are also discussed.
文摘OS/2或Microsoft Windows应用框架其实就是封装和抽象API关键部分的C++类库。Borland C++4.5和Database Tools与Object Windows Library(OWL)2.5一起销售,而Microsoft Visual C++ 2.0则突出了Microsoft Foundation Classes(MFC) 3.0。(Microsoft的16位Visual C++ 1.51仍与老的MFC 2.5一起销售。) 这两个应用框架加快了Windows程序的开发,并使你能增加诸如OLE 2.0这样的功能,这些功能可以使你几乎不用自己编码。
基金supported by the National Natural Science Foundation of China(Grant No.41490611)to Bai L and Zhao J Mthe China academy of Sciences(Grant No.XDB03010702)to Zhao J Mthe TWAS(The world Academy of Sciences)through CAS-TWAS president fellowship to Khan N G
文摘As one of the world's most active intracontinental mountain belts, Tien Shan has posed questions for researchers regarding the formation of different tectonic units and active shallow seismicity. Here, we used a huge data set comprising of 7094 earthquakes from local, regional and teleseismic seismic stations. We used waveform modeling and multi-scale double-difference earthquake relocation technique to better constrain the source parameters of the earthquakes. The new set of events provided us with better initial earthquake locations for further tomographic investigation. We found that reverse-faulting earthquakes dominate the whole study area while the fault plane solutions for earthquakes beneath the northwestern Tarim Basin and the Main Pamir Thrust are diverse. There is a low-velocity anomaly beneath Bashkaingdy at depth of 80 km, and high-velocity anomalies beneath central Tien Shan at shallower depths. These observations are the keys to understand the mechanism of Tien Shan's formation because of Tarim Basin northward and Kazakh Shield's southward subduction in the south and north respectively. Velocities beneath western Tien Shan are relatively high. We thus infer that the Western Tien Shan is relatively less deformed than the eastern Tien Shan primarily due to a relatively brittle mantle.
