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679 Result(s)
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Article
Geological thermal events in Tarim Basin
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Article
Current status and future of acid rain in China
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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 (Eu1-x, Yx)2CuO4 and Sm2CuO4, prepared under high pressure, has been investigated. This anomaly originated from different mechanisms to...
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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...
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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...
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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...
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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, ...
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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...
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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...
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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...
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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) ...
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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 ...
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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 ...
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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...
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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...
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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...
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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...
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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...
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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...
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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...