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  • 11
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    Size Control and Catalytic Activity of Highly Dispersed Pd Nanoparticles Supported on Porous Glass Beads (2012)
    American Chemical Society (ACS)
    In: Langmuir
    Details
    Publication Date: 2012-05-01
    Description: Langmuir DOI: 10.1021/la300825s
    Print ISSN: 0743-7463
    Electronic ISSN: 1520-5827
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society (ACS)
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  • 12
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    Antisymmetric magnetoresistance in van der Waals Fe3GeTe2/graphite/Fe3GeTe2 trilayer heterostructures (2019)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2019
    Description: 〈p〉With no requirements for lattice matching, van der Waals (vdW) ferromagnetic materials are rapidly establishing themselves as effective building blocks for next-generation spintronic devices. We report a hitherto rarely seen antisymmetric magnetoresistance (MR) effect in vdW heterostructured Fe〈sub〉3〈/sub〉GeTe〈sub〉2〈/sub〉 (FGT)/graphite/FGT devices. Unlike conventional giant MR (GMR), which is characterized by two resistance states, the MR in these vdW heterostructures features distinct high-, intermediate-, and low-resistance states. This unique characteristic is suggestive of underlying physical mechanisms that differ from those observed before. After theoretical calculations, the three-resistance behavior was attributed to a spin momentum locking induced spin-polarized current at the graphite/FGT interface. Our work reveals that ferromagnetic heterostructures assembled from vdW materials can exhibit substantially different properties to those exhibited by similar heterostructures grown in vacuum. Hence, it highlights the potential for new physics and new spintronic applications to be discovered using vdW heterostructures.〈/p〉
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
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  • 13
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    A Method to Improve Mineral Identification Accuracy Based on Hyperspectral Data (2014)
    Institute of Physics (IOP)
    Details
    Publication Date: 2014-03-20
    Description: To improve the mineral identification accuracy of the rapid quantificational identification model, the noise was filtered in fragment based on the wavelength of altered mineral absorption peak and the regional spectral library that fitted for the study area was established. The filtered spectra were analyzed by the method with regional spectral library. Compared with the originally mineral identification result, the average efficiency rate was improved by 5.1%; the average accuracy rate was improved by 17.7%. The results were optimized by the method based on the position of the altered mineral absorption peak. The average efficiency rate would be improved in the future to identify more accurate minerals.
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
    Published by Institute of Physics (IOP)
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  • 14
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    Atomic-scale mapping of dipole frustration at 90° charged domain walls in ferroelectric PbTiO3 films (2014)
    Springer Nature
    Details
    Publication Date: 2014-02-19
    Description: The atomic-scale structural and electric parameters of the 90° domain-walls in tetragonal ferroelectrics are of technological importance for exploring the ferroelectric switching behaviors and various domain-wall-related novel functions. We have grown epitaxial PbTiO3/SrTiO3 multilayer films in which the electric dipoles at 90° domain-walls of ferroelectric PbTiO3 are characterized by means of aberration-corrected scanning transmission electron microscopy. Besides the well-accepted head-to-tail 90° uncharged domain-walls, we have identified not only head-to-head positively charged but also tail-to-tail negatively charged domain-walls. The widths, polarization distributions, and strains across these charged domain-walls are mapped quantitatively at atomic scale, where remarkable difference between these domain-walls is presented. This study is expected to provide fundamental information for understanding numerous novel domain-wall phenomena in ferroelectrics. Scientific Reports 4 doi: 10.1038/srep04115
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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  • 15
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    Quantitative Prediction Study of Climate-sensitive Potassium with Hyperspectrum in Arid and Semi-arid Region of Northwestern China (2014)
    Institute of Physics (IOP)
    Details
    Publication Date: 2014-03-19
    Description: Soil potassium content in arid and semi-arid region can reflect the conditions of the paleoclimate and it can be inverted by soil spectra. The relationship between soil spectra and soil potassium content was discussed in this research. Based on four reflectance transformations, single-variance analysis and multi-variances inversion model were built to invert potassium content. The results of single-wavelength inversions were very significant except for the reflectance model. The multi-variances models were good and accurately (R 2 (determination coefficient) 〉0.674 and RMSE (root-mean-square error)
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
    Published by Institute of Physics (IOP)
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  • 16
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    Plastome Sequences of Lygodium japonicum and Marsilea crenata Reveal the Genome Organization Transformation from Basal Ferns to Core Leptosporangiates (2013)
    Oxford University Press
    Details
    Publication Date: 2013-08-02
    Description: Previous studies have shown that core leptosporangiates, the most species-rich group of extant ferns (monilophytes), have a distinct plastid genome (plastome) organization pattern from basal fern lineages. However, the details of genome structure transformation from ancestral ferns to core leptosporangiates remain unclear because of limited plastome data available. Here, we have determined the complete chloroplast genome sequences of Lygodium japonicum (Lygodiaceae), a member of schizaeoid ferns (Schizaeales), and Marsilea crenata (Marsileaceae), a representative of heterosporous ferns (Salviniales). The two species represent the sister and the basal lineages of core leptosporangiates, respectively, for which the plastome sequences are currently unavailable. Comparative genomic analysis of all sequenced fern plastomes reveals that the gene order of L. japonicum plastome occupies an intermediate position between that of basal ferns and core leptosporangiates. The two exons of the fern ndhB gene have a unique pattern of intragenic copy number variances. Specifically, the substitution rate heterogeneity between the two exons is congruent with their copy number changes, confirming the constraint role that inverted repeats may play on the substitution rate of chloroplast gene sequences.
    Electronic ISSN: 1759-6653
    Topics: Biology
    Published by Oxford University Press
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  • 17
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    A high-resolution absolute-dated late Pleistocene Monsoon record from Hulu Cave, China (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-18
    Description: Oxygen isotope records of five stalagmites from Hulu Cave near Nanjing bear a remarkable resemblance to oxygen isotope records from Greenland ice cores, suggesting that East Asian Monsoon intensity changed in concert with Greenland temperature between 11,000 and 75,000 years before the present (yr. B.P.). Between 11,000 and 30,000 yr. B.P., the timing of changes in the monsoon, as established with 230Th dates, generally agrees with the timing of temperature changes from the Greenland Ice Sheet Project Two (GISP2) core, which supports GISP2's chronology in this interval. Our record links North Atlantic climate with the meridional transport of heat and moisture from the warmest part of the ocean where the summer East Asian Monsoon originates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Y J -- Cheng, H -- Edwards, R L -- An, Z S -- Wu, J Y -- Shen, C C -- Dorale, J A -- New York, N.Y. -- Science. 2001 Dec 14;294(5550):2345-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉College of Geography Science, Nanjing Normal University, Nanjing 210097, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11743199" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 18
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    Contemporary deformation of the North China Plain from Global Positioning System data (2018)
    Wiley
    Details
    Publication Date: 2018-02-17
    Description: The North China Plain (NCP) is a region with high level of seismic hazard. Previous GPS measurements, however have shown a near absence of present-day crustal deformation. Using updated GPS data covering three blocks of the eastern China, we discover that interseismic deformation in the NCP takes place in a ~1100 km wide left-lateral shear zone of roughly east-west orientation. The 6.0±1.3 mm/yr interseismic left-lateral shear over the NCP results in contemporary deformation that is eventually accommodated by earthquake ruptures of right-lateral strike-slip along the north-northeast trending faults and anticlockwise block rotates. We suggest that rapid ~eastward motion of the rigid South China block, with respect to the rigid Amurian block, have created a left-lateral shear couple to twist the non-rigid NCP to form the contemporary deformation.
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 19
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    Endogenous protein S-Nitrosylation in E. coli: regulation by OxyR (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-04-28
    Description: Endogenous S-nitrosylation of proteins, a principal mechanism of cellular signaling in eukaryotes, has not been observed in microbes. We report that protein S-nitrosylation is an obligate concomitant of anaerobic respiration on nitrate in Escherichia coli. Endogenous S-nitrosylation during anaerobic respiration is controlled by the transcription factor OxyR, previously thought to operate only under aerobic conditions. Deletion of OxyR resulted in large increases in protein S-nitrosylation, and S-nitrosylation of OxyR induced transcription from a regulon that is distinct from the regulon induced by OxyR oxidation. Furthermore, products unique to the anaerobic regulon protected against S-nitrosothiols, and anaerobic growth of E. coli lacking OxyR was impaired on nitrate. Thus, OxyR serves as a master regulator of S-nitrosylation, and alternative posttranslational modifications of OxyR control distinct transcriptional responses.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3837355/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3837355/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Seth, Divya -- Hausladen, Alfred -- Wang, Ya-Juan -- Stamler, Jonathan S -- R01 HL059130/HL/NHLBI NIH HHS/ -- R01 HL095463/HL/NHLBI NIH HHS/ -- R01 HL096673/HL/NHLBI NIH HHS/ -- R01-HL059130/HL/NHLBI NIH HHS/ -- R01-HL095463/HL/NHLBI NIH HHS/ -- R01-HL096673/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2012 Apr 27;336(6080):470-3. doi: 10.1126/science.1215643.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Transformative Molecular Medicine and Department of Medicine, Case Western Reserve University School of Medicine and University Hospitals Case Medical Center, Cleveland, OH 44106, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22539721" target="_blank"〉PubMed〈/a〉
    Keywords: Anaerobiosis ; Culture Media ; Escherichia coli K12/genetics/growth & development/*metabolism ; Escherichia coli Proteins/genetics/*metabolism ; Nitrates/*metabolism ; Nitric Oxide/metabolism ; Nitrites/metabolism ; Oxidation-Reduction ; Promoter Regions, Genetic ; Protein Processing, Post-Translational ; Regulon ; Repressor Proteins/genetics/*metabolism ; S-Nitrosothiols/*metabolism ; Transcriptional Activation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 20
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    Observation of Dirac node formation and mass acquisition in a topological crystalline insulator (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-08-31
    Description: In topological crystalline insulators (TCIs), topology and crystal symmetry intertwine to create surface states with distinct characteristics. The breaking of crystal symmetry in TCIs is predicted to impart mass to the massless Dirac fermions. Here, we report high-resolution scanning tunneling microscopy studies of a TCI, Pb(1-x)Sn(x)Se that reveal the coexistence of zero-mass Dirac fermions protected by crystal symmetry with massive Dirac fermions consistent with crystal symmetry breaking. In addition, we show two distinct regimes of the Fermi surface topology separated by a Van-Hove singularity at the Lifshitz transition point. Our work paves the way for engineering the Dirac band gap and realizing interaction-driven topological quantum phenomena in TCIs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Okada, Yoshinori -- Serbyn, Maksym -- Lin, Hsin -- Walkup, Daniel -- Zhou, Wenwen -- Dhital, Chetan -- Neupane, Madhab -- Xu, Suyang -- Wang, Yung Jui -- Sankar, R -- Chou, Fangcheng -- Bansil, Arun -- Hasan, M Zahid -- Wilson, Stephen D -- Fu, Liang -- Madhavan, Vidya -- New York, N.Y. -- Science. 2013 Sep 27;341(6153):1496-9. doi: 10.1126/science.1239451. Epub 2013 Aug 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physics, Boston College, Chestnut Hill, MA 02467, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23989954" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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