258 Result(s)
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Science, Humanities and Social Sciences, multidisciplinary
**ao-chun **e
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Oldest known amphisbaenian from the Upper Cretaceous of Chinese Inner Mongolia
THE amphisbaenians, lizards and snakes constitute a monophyletic group, the Squamata. Although amphisbaenians are known to have occurred in the Mesozoic1,2, their remains are rare and fragmentary. The oldest and ...
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A plant-eating crocodyliform reptile from the Cretaceous of China
WITH few exceptions, tooth shape among crocodyliform reptiles (Crocodylia of traditional use) is rather uniform1. We report here on the presence of multicuspid molariform teeth in a remarkable new crocodyliform f...
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A dromaeosaurid dinosaur with a filamentous integument from the Yixian Formation of China
Dromaeosaurids, despite their notoriety, are poorly characterized meat-eating dinosaurs, and were previously known only from disarticulated or fragmentary specimens1. Many studies have denied their close relation...
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The neuronal repellent Slit inhibits leukocyte chemotaxis induced by chemotactic factors
Migration is a basic feature of many cell types in a wide range of species1. Since the 1800s, cell migration has been proposed to occur in the nervous and immune systems2,3, and distinct molecular cues for mammal...
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A basal troodontid from the Early Cretaceous of China
Troodontid dinosaurs form one of the most avian-like dinosaur groups1,2,3,4,5. Their phylogenetic position is hotly debated, and they have been allied with almost all principal coelurosaurian lineages6,7,8,9,10,1...
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A polydactylous amniote from the Triassic period
The earliest four-limbed vertebrates, or tetrapods, lived between 370 million and 354 million years ago, during the Late Devonian period, and typically had more than five digits (polydactyly)1. We have discovered...
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Triassic marine reptiles gave birth to live young
Sauropterygians form the largest and most diverse group of ancient marine reptiles that lived throughout nearly the entire Mesozoic era (from 250 to 65 million years ago)1,2. Although thousands of specimens of th...
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An ancestral turtle from the Late Triassic of southwestern China
A well preserved 220-million-year-old fossil from marine deposits of the Late Triassic of Guizhou in southwest China sheds light on the intermediate steps in the acquisition of the unique turtle body-plan. Tra...
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Open AccessLoss of the respiratory enzyme citrate synthase directly links the Warburg effect to tumor malignancy
To investigate whether altered energy metabolism induces the Warburg effect and results in tumor malignancy, the respiratory enzyme citrate synthase (CS) was examined, silenced and the effects analyzed. In hum...
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Open AccessSynthesis and Quantum Transport Properties of Bi2Se3 Topological Insulator Nanostructures
Bi2Se3 nanocrystals with various morphologies, including nanotower, nanoplate, nanoflake, nanobeam and nanowire, have been synthesized. Well-distinguished Shubnikov-de Haas (SdH) oscillations were observed in Bi2
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Open AccessGrowing Hyperbranched Polymers Using Natural Sunlight
In nature, a sapling can grow into a big tree under irradiation of sunlight. In chemistry, a similar concept that a small molecule only exposing to sunlight grows into a hyperbranched macromolecule has not bee...
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Probing water micro-solvation in proteins by water catalysed proton-transfer tautomerism
Scientists have made tremendous efforts to gain understanding of the water molecules in proteins via indirect measurements such as molecular dynamic simulation and/or probing the polarity of the local environm...
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Open AccessMysterious abrupt carbon-14 increase in coral contributed by a comet
A large and sudden increase in radiocarbon (14C) around AD 773 are documented in coral skeletons from the South China Sea. The 14C increased by ~ 15‰ during winter and remain elevated for more than 4 months, then...
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Open AccessInnovative strategy with potential to increase hemodialysis efficiency and safety
Uremic toxins are mainly represented by blood urine nitrogen (BUN) and creatinine (Crea) whose removal is critically important in hemodialysis (HD) for kidney disease. Patients undergoing HD have a complex ill...
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Open AccessRapid control of phase growth by nanoparticles
Effective control of phase growth under harsh conditions (such as high temperature, highly conductive liquids or high growth rate), where surfactants are unstable or ineffective, is still a long-standing chall...
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Open AccessMap** polarization induced surface band bending on the Rashba semiconductor BiTeI
Surfaces of semiconductors with strong spin-orbit coupling are of great interest for use in spintronic devices exploiting the Rashba effect. BiTeI features large Rashba-type spin splitting in both valence and ...
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Open AccessmiR-21 improves the neurological outcome after traumatic brain injury in rats
The expression levels of microRNAs (miRNAs) including miR-21, have been reported to change in response to traumatic brain injury (TBI), suggesting that they may influence the pathophysiological process in brai...
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Open AccessPlatinum-Free Counter Electrode Comprised of Metal-Organic-Framework (MOF)-Derived Cobalt Sulfide Nanoparticles for Efficient Dye-Sensitized Solar Cells (DSSCs)
We fabricated a highly efficient (with a solar-to-electricity conversion efficiency (η) of 8.1%) Pt-free dye-sensitized solar cell (DSSC). The counter electrode was made of cobalt sulfide (CoS) nanoparticles s...
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Open AccessPrevalence and genetic characteristics of Saffold cardiovirus in China from 2009 to 2012
The epidemiology and clinical features of the Saffold cardiovirus (SAFV) remain ambiguous. The present study was designed to systematically and intensively investigate the epidemiological features of SAFV in p...
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Open AccessTranscriptome comparison of the sex pheromone glands from two sibling Helicoverpa species with opposite sex pheromone components
Differences in sex pheromone component can lead to reproductive isolation. The sibling noctuid species, Helicoverpa armigera and Helicoverpa assulta, share the same two sex pheromone components, Z9-16:Ald and Z11...
