679 Result(s)

Article

Geological thermal events in Tarim Basin

Hanlin Chen, Shufeng Yang, Chuanwan Dong, Guoqiang Zhu… in Chinese Science Bulletin (1997)

Article

Current status and future of acid rain in China

Guo’an Ding, **aobing Xu, **umei Fang, Shu** **, **a Xu… in Chinese Science Bulletin (1997)

Article

Low-temperature magnetic anomalies of oxygen-doped T′-type 214 compounds

A new low-temperature anomalous magnetism at about 29 K for the oxygen-doped (Eu_1-x, Y_x)₂CuO₄ and Sm₂CuO₄, prepared under high pressure, has been investigated. This anomaly originated from different mechanisms to...

Yufeng **ong, Duo **, Yushu Yao, shuquan Guo, Fei Wu… in Chinese Science Bulletin (1998)

Article

Discovery of Permian islandarc basalts in the Cenxi area and the tectonic significance

Cenxi Permian basalts are the late Palaeozoic island-arc type basalts first found in South China. REE and trace element characteristics and distribution patterns show that this volcanic formation, which has be...

Boyou Zhang, Zhenhua Zhao, Manquan Shi, Shufeng Yang… in Chinese Science Bulletin (1998)

Article

Seasonal patterns of spatial differentiation of landcover change in China

Using the 1° × 1° NOAA AVHRR NDVI data set in China, an index on the spatial different gradient of landcover is created. Then based on the index and supported by the geographical information system, it is reve...

Yufeng Chen in Chinese Science Bulletin (1999)

Article

Energetic optimization of ion conduction rate by the K⁺ selectivity filter

The K⁺ selectivity filter catalyses the dehydration, transfer and rehydration of a K⁺ ion in about ten nanoseconds. This physical process is central to the production of electrical signals in biology. Here we sho...

João H. Morais-Cabral, Yufeng Zhou, Roderick MacKinnon in Nature (2001)

Article

Chemistry of ion coordination and hydration revealed by a K⁺ channel–Fab complex at 2.0 Å resolution

Ion transport proteins must remove an ion's hydration shell to coordinate the ion selectively on the basis of its size and charge. To discover how the K⁺ channel solves this fundamental aspect of ion conduction, ...

Yufeng Zhou, João H. Morais-Cabral, Amelia Kaufman, Roderick MacKinnon in Nature (2001)

Article

A high-Tc dc-SQUID-based single-channel MCG and its performance

A single-channel high-Tc dc-SQUID magnetometer and gradiometer have been developed to record the magnetic field component perpendicular to the human chest generated by heart-beat. Magnetocardiogram (MCG) measu...

Huiwu Wang, Hongsheng Ding, Lihua Zhang, Xuguang Huang… in Chinese Science Bulletin (2002)

Article

Orientation of the peptide formation of N-phosphoryl amino acids in solution

The peptide formation of N-phosphoryl amino acids with amino acids proceeds in aqueous solution without any coupling reagents. After being separated in sephadex gel column, the phosphoryl dipeptides were analyzed...

Zhongzhou Chen, Yufeng Tong, Shuibing Chen, Yanmei Li, Yi Chen… in Chinese Science Bulletin (2002)

Article

Tectonic evolution of Tethyan tectonic field, formation of Northern Margin basin and explorative perspective of natural gas in Tarim Basin

Analyzing the characteristics of the Tethyan tectonic field, the authors think that the Tethyan tectonic field underwent three evolutional stages: closing of Paleo-Tethys and rifting of Neo-Tethys from early P...

Shufeng Yang, Chengzao Jia, Hanlin Chen, Guoqi Wei… in Chinese Science Bulletin (2002)

Article

High efficient light-emitting diodes using polystyrene as matrix

High efficient polymer light-emitting diodes (PLEDs) were obtained by using a blend of conjugated polymer G-PF, a copolymer of fluorene and thiophene, and polystyrene (PS). The maximum electroluminescent (EL) ...

Gufeng He, Jie Liu, Yang Yang, Yongfang Li in Chinese Science Bulletin (2003)

Article

Chemical components and microtopography of (100) surface for orthopyroxene

XPS and AES depth composition profile studies were carried on to understand chemical components of (100) surfaces for Chengde hypersthene from Hebei Province, China, and Bamble enstatite from Norway. Also, to ...

Jiyue Xue, Yuguan Pan, Gufeng Luo, Hai** Lu in Chinese Science Bulletin (2003)

Article

Involvement of secondary motor areas in externally-triggered single-finger movements of dominant and non-dominant hands

Whether the secondary motor areas are involved in simple voluntary movements remains controversial. Differences in the neural substrates of movements with the dominant and the non-dominant hands have not been ...

Yun Gu, Yufeng Zang, Xuchu Weng, Fucang Jia, Enzhong Li… in Chinese Science Bulletin (2003)

Article

In situ synthesis of TiC reinforced Cu₄₇Ti₃₄Zr₁₁Ni₈ bulk metallic glass composites

In situ synthesized TiC particles and β-Ti dendrites reinforced Cu₄₇Ti₃₄Zr₁₁Ni₈ bulk metallic glass (BMG) composite ingots were prepared by the suction casting method. The ingots with diameters f...

Yufeng Sun, Guosheng Zhang, Bingchen Wei, Weihuo Li, Yuren Wang in Chinese Science Bulletin (2004)

Article

Genetic evidence supports demic diffusion of Han culture

The spread of culture and language in human populations is explained by two alternative models: the demic diffusion model, which involves mass movement of people; and the cultural diffusion model, which refers...

Bo Wen, Hui Li, Daru Lu, **ufeng Song, Feng Zhang, Yungang He, Feng Li, Yang Gao… in Nature (2004)

Article

An investigation of electron momentum spectroscopy on the 9a₁ and 5b₂ orbitals of thiophene

The electron momentum spectra of outer valence orbitals 9a₁+5b₂ of thiophene (C₄H₄S) have been studied by binary (e, 2e) electron momentum spectroscopy (EMS), at an impact energy of 1200 eV plus binding energy, a...

Shufeng Zhang, Guolin Su, Xueguang Ren, Chuangang Ning, Bin Li… in Chinese Science Bulletin (2005)

Article

Structure, flame retarding and smoke suppressing properties of Zn-Mg-Al-CO3 layered double hydroxides

Zn-Mg-Al-CO₃ layered double hydroxides (LDHs) have been synthesized by a new method involving separate nucleation and aging steps. The Zn-Mg-Al-CO₃ LDHs were characterized by XRD, FT-IR, ICP and TG-DTA. The limit...

Ling Shi, Dianqing Li, Sufeng Li, Jianrong Wang, D. G. Evans… in Chinese Science Bulletin (2005)

Article

Micro- and nano-structured conducting polymeric materials

Conducting polymeric materials with micro-/ nano-structures have potential applications in fabrication of various optical, electronic, sensing and electrochemical devices. This is mainly because these material...

Gewu Lu, Feng’en Chen, Xufeng Wu, Liangti Qu, Jiaxin Zhang… in Chinese Science Bulletin (2005)

Article

Synthesis of high molecular weight polylactic acid from aqueous lactic acid co-catalyzed by tin(II)chloride dihydrate and succinic anhydride

Polylactic acid was synthesized from commercial available cheap aqueous lactic acid (85%–90% w/w) using succinic anhydride and SnCl₂.2H₂O as catalyst in the absence of organic solvents. As a result, polylactic ac...

Ziqiang Lei, Yanbin Bai, Shoufeng Wang in Chinese Science Bulletin (2005)

Article

Hf isotopes of zircon megacrysts from the Cenozoic basalts in eastern China

Cenozoic basalts are widely distributed in eastern China, and some of them contain zircon megacrysts which are considered to be constituent mineral of the subcontinental lithospheric mantle (SCLM) and petrogen...

Zhili Qiu, Fuyuan Wu, Qingyuan Yu, Liewen **e, Shufeng Yang in Chinese Science Bulletin (2005)