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| 1 | Apoptosis of human colon carcinoma HT-29 cells induced by ceramide显示文摘瞄准:在人的冒号癌 HT-29 房间上调查外长的导致 ceramide 的 apoptosis 的效果。方法:轻显微镜,传播电子显微镜和荧光显微镜被用来在 HT-29 房间观察 apoptosis 的形态学变化。Agarose 胶化电气泳动被执行检测 DNA 碎片。Mitochondrial 功能被 MTT 试金检测。Bcl-2 家庭基因成员的 mRNA 表示被反向的抄写决定聚合酶链反应(RT-PCR ) 试金。结果:在 C2-ceramide 治疗以后, apoptosis 的典型特征例如原子染色质破裂, apoptotic 身体和 DNA 梯子,能被观察。在到为 12 和 24 h 的 50 micromol/L C2-ceramide 的暴露以后,房间 apoptosis 分别地是 64.1% 和 81.3% ,它有一时间 -- 并且剂量效果关系。Mitochondrial 功能开始在暴露以后从 6 h 减少到酰基鞘氨醇。同时,起来调整或下面调整的酰基鞘氨醇 Bcl-2 家庭基因成员的 mRNA 表示。结论:酰基鞘氨醇由影响 Bcl-2 家庭基因成员的表示并且影响 mitochondrial 功能导致人的冒号癌 HT-29 房间的 apoptosis。 | Xiao-Feng Zhang Bai-Xiang Li Chun-Yan Dong Rui Pen | 2006 | World Journal of Gastroenterology2006，12，22： | 4 |
| 2 | On the role of climate in desertification of the Sahel Belt显示文摘s—Sahel in West Africa is the most seriously desertified zone in the world. In this paper, the impact of climate on desertification in Sahel is discussed. The climate can exert an impact on desertification in the zone either individually or in conjunction with excessive human economic activities. The rapid desertification in the zone over the last several decades, however, is mainly caused by excessive human economic activities. | DING Dengshan MA Jongli PEN Buzhuo RUI Fuhong ZHANG Hong ZHANG An Department of Urban and Resources Science, Nanjing University, Nanjing 210093 CHINA | 1998 | Journal of Geographical Sciences1998，8，4： | 1 |
| 3 | The Tianlai Cylinder Pathfinder array: System functions and basic performance analysis显示文摘The Tianlai Cylinder Pathfinder is a radio interferometer array designed to test techniques for 21 cm intensity mapping in the post-reionization Universe,with the ultimate aim of mapping the large scale structure and measuring cosmological parameters such as the dark energy equation of state.Each of its three parallel cylinder reflectors is oriented in the north-south direction,and the array has a large field of view.As the Earth rotates,the northern sky is observed by drift scanning.The array is located in Hongliuxia,a radio-quiet site in Xinjiang,and saw its first light in September 2016.In this first data analysis paper for the Tianlai cylinder array,we discuss the sub-system qualification tests,and present basic system performance obtained from preliminary analysis of the commissioning observations during 2016-2018.We show typical interferometric visibility data,from which we derive the actual beam profile in the east-west direction and the frequency band-pass response.We describe also the calibration process to determine the complex gains for the array elements,either using bright astronomical point sources,or an artificial on site calibrator source,and discuss the instrument response stability,crucial for transit interferometry.Based on this analysis,we find a system temperature of about 90 K,and we also estimate the sensitivity of the array. | JiXia Li ShiFan Zuo FengQuan Wu YouGang Wang JuYong Zhang ShiJie Sun YiDong Xu ZiJie Yu Reza Ansari YiChao Li Albert Stebbins Peter Timbie YanPing Cong JingChao Geng Jie Hao QiZhi Huang JianBin Li Rui Li DongHao Liu YingFeng Liu Tao Liu John PMarriner ChenHui Niu Ue-Li Pen Jeffery BPeterson HuLi Shi Lin Shu YaFang Song HaiJun Tian GuiSong Wang QunXiong Wang RongLi Wang WeiXia Wang Xin Wang KaiFeng Yu Jiao Zhang BoQin Zhu JiaLu Zhu XueLei Chen | 2020 | Science China(Physics,Mechanics & Astronomy)2020，63，12： | 0 |
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