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  • 1
    Publication Date: 2013-06-11
    Description: Author(s): M. Y. Pustylnik, L. Hou, A. V. Ivlev, L. M. Vasilyak, L. Couëdel, H. M. Thomas, G. E. Morfill, and V. E. Fortov An influence of a high-voltage (3–17 kV) 20 ns pulse on a weakly-ionized low-pressure (0.1–10 Pa) capacitively coupled radiofrequency (RF) argon plasma is studied experimentally. The plasma evolution after pulse exhibits two characteristic regimes: a bright flash, occurring within 100 ns after the p... [Phys. Rev. E 87, 063105] Published Mon Jun 10, 2013
    Keywords: Plasma Physics
    Print ISSN: 1539-3755
    Electronic ISSN: 1550-2376
    Topics: Physics
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  • 2
    Publication Date: 2014-12-09
    Description: The magnetic configuration of Mn 2 NiAl ribbon has been investigated. In contrast to Ni 2 MnAl, the compound Mn 2 NiAl with considerable disorder does exhibit ferromagnetism and, due to exchange interaction competition, both ferromagnetic and antiferromagnetic moment orientations can coexist between nearest neighbor Mn atoms. This is unexpected in Heusler alloys. Regarding the mechanism of the martensitic transformation in Mn 50 Ni 50− x Al x , it is found that increasing the Al content results in an unusual change in the lattice constant, a decrease of the transformation entropy change, and enhancement of the calculated electron localization. These results indicate that the p-d covalent hybridization between Mn (or Ni) and Al atoms gradually increases at the expense of the d-d hybridization between Ni and Mn atoms. This leads to an increased stability of the austenite phase and a decrease of the martensitic transformation temperature. For 11 ≤  x  ≤ 14, Mn 50 Ni 50− x Al x ferromagnetic shape memory alloys are obtained.
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
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  • 3
    Publication Date: 2014-01-23
    Description: The large-scale practical application of fuel cells cannot come true if the high-priced Pt-based electrocatalysts for oxygen reduction reaction (ORR) cannot be replaced by other efficient, low-cost, and stable electrodes. Here, based on density functional theory (DFT), we exploited the potentials of layered SiC sheets as a novel catalyst for ORR. From our DFT results, it can be predicted that layered SiC sheets exhibit excellent ORR catalytic activity without CO poisoning, while the CO poisoning is the major drawback in conventional Pt-based catalysts. Furthermore, the layered SiC sheets in alkaline media has better catalytic activity than Pt(111) surface and have potential as a metal-free catalyst for ORR in fuel cells. Scientific Reports 4 doi: 10.1038/srep03821
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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  • 4
    Publication Date: 2011-12-10
    Description: Author(s): L. Ma (马丽), W. H. Wang (王文洪), C. M. Zhen (甄聪棉), D. L. Hou (侯登录), X. D. Tang (唐晓丹), E. K. Liu (刘恩克), and G. H. Wu (吴光恒) [Phys. Rev. B 84, 224404] Published Fri Dec 09, 2011
    Keywords: Magnetism
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 5
    Publication Date: 2014-09-10
    Description: The paracellular pathway through the tight junction provides an important route for transepithelial chloride reabsorption in the kidney, which regulates extracellular salt content and blood pressure. Defects in paracellular chloride reabsorption may in theory cause deregulation of blood pressure. However, there is no evidence to prove this theory or to...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 6
    Publication Date: 2014-09-13
    Description: In Mn 50 Ni 41− x Sn 9 Co x ribbons, the exchange bias field is very sensitive to the Co content. Based on both theoretical and experimental studies, it has been found that with increasing Co content, the pinned phase (ferromagnetic phase) remains almost unchanged while the pinning phase is changed from a canonical spin glass to a cluster spin glass and finally to a ferromagnetic phase. Changing the Co content in Mn 50 Ni 41− x Sn 9 Co x alloys has been proven to be an effective way of tuning the magnetic anisotropy and the phase structure of the pinning phase. With different Co contents, a continuous tuning of the exchange bias field from 345 Oe to 3154 Oe is realized.
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
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  • 7
    Publication Date: 2012-10-07
    Description: Environmental Science & Technology DOI: 10.1021/es301979r
    Print ISSN: 0013-936X
    Electronic ISSN: 1520-5851
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
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  • 8
    Publication Date: 2018-10-12
    Description: Surface coarse structure is one of key factors affecting the superhydrophobicity, yet it’s not very clear that what kind of structure is the best for hydrophobicity. Herein in order to study the effect of surface coarse structure, eight kinds of spherical SiO 2 (20 nm, 60 nm, 200 nm, 500 nm, 1 μm, 2 μm, 5 μm and 10 μm) were taken as raw material respectively to explore the effect of particle size on the hydrophobic performance. SiO 2 was deposited on the glass substrate layer by layer using the electrostatic assembly method based on the reaction of amino and epoxy groups. The sample’s structure and properties were characterized respectively by scanning electron microscopy and contact angle measuring instrument. The relationship between SiO 2 particle size and surface hydrophobicity was explored and the superhydrophobic stability were tested. The results show that the surface of SiO 2 film layers are stacked together and arranged tightly, a...
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
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  • 9
    Publication Date: 2009-10-02
    Description: The early evolution of the major groups of derived non-avialan theropods is still not well understood, mainly because of their poor fossil record in the Jurassic. A well-known result of this problem is the 'temporal paradox' argument that is sometimes made against the theropod hypothesis of avian origins. Here we report on an exceptionally well-preserved small theropod specimen collected from the earliest Late Jurassic Tiaojishan Formation of western Liaoning, China. The specimen is referable to the Troodontidae, which are among the theropods most closely related to birds. This new find refutes the 'temporal paradox'1 and provides significant information on the temporal framework of theropod divergence. Furthermore, the extensive feathering of this specimen, particularly the attachment of long pennaceous feathers to the pes, sheds new light on the early evolution of feathers and demonstrates the complex distribution of skeletal and integumentary features close to the dinosaur-bird transition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hu, Dongyu -- Hou, Lianhai -- Zhang, Lijun -- Xu, Xing -- England -- Nature. 2009 Oct 1;461(7264):640-3. doi: 10.1038/nature08322.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Paleontological Institute, Shenyang Normal University, 253 North Huanghe Street, Shenyang 110034, China. hudongyu@synu.edu.cn〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19794491" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; *Birds/anatomy & histology/classification ; Calibration ; China ; Dinosaurs/*anatomy & histology/*classification ; Feathers/*anatomy & histology ; Flight, Animal ; Foot/anatomy & histology ; *Fossils ; Metatarsus/*anatomy & histology ; Phylogeny
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 2005-07-16
    Description: Whole-genome sequencing of the protozoan pathogen Trypanosoma cruzi revealed that the diploid genome contains a predicted 22,570 proteins encoded by genes, of which 12,570 represent allelic pairs. Over 50% of the genome consists of repeated sequences, such as retrotransposons and genes for large families of surface molecules, which include trans-sialidases, mucins, gp63s, and a large novel family (〉1300 copies) of mucin-associated surface protein (MASP) genes. Analyses of the T. cruzi, T. brucei, and Leishmania major (Tritryp) genomes imply differences from other eukaryotes in DNA repair and initiation of replication and reflect their unusual mitochondrial DNA. Although the Tritryp lack several classes of signaling molecules, their kinomes contain a large and diverse set of protein kinases and phosphatases; their size and diversity imply previously unknown interactions and regulatory processes, which may be targets for intervention.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉El-Sayed, Najib M -- Myler, Peter J -- Bartholomeu, Daniella C -- Nilsson, Daniel -- Aggarwal, Gautam -- Tran, Anh-Nhi -- Ghedin, Elodie -- Worthey, Elizabeth A -- Delcher, Arthur L -- Blandin, Gaelle -- Westenberger, Scott J -- Caler, Elisabet -- Cerqueira, Gustavo C -- Branche, Carole -- Haas, Brian -- Anupama, Atashi -- Arner, Erik -- Aslund, Lena -- Attipoe, Philip -- Bontempi, Esteban -- Bringaud, Frederic -- Burton, Peter -- Cadag, Eithon -- Campbell, David A -- Carrington, Mark -- Crabtree, Jonathan -- Darban, Hamid -- da Silveira, Jose Franco -- de Jong, Pieter -- Edwards, Kimberly -- Englund, Paul T -- Fazelina, Gholam -- Feldblyum, Tamara -- Ferella, Marcela -- Frasch, Alberto Carlos -- Gull, Keith -- Horn, David -- Hou, Lihua -- Huang, Yiting -- Kindlund, Ellen -- Klingbeil, Michele -- Kluge, Sindy -- Koo, Hean -- Lacerda, Daniela -- Levin, Mariano J -- Lorenzi, Hernan -- Louie, Tin -- Machado, Carlos Renato -- McCulloch, Richard -- McKenna, Alan -- Mizuno, Yumi -- Mottram, Jeremy C -- Nelson, Siri -- Ochaya, Stephen -- Osoegawa, Kazutoyo -- Pai, Grace -- Parsons, Marilyn -- Pentony, Martin -- Pettersson, Ulf -- Pop, Mihai -- Ramirez, Jose Luis -- Rinta, Joel -- Robertson, Laura -- Salzberg, Steven L -- Sanchez, Daniel O -- Seyler, Amber -- Sharma, Reuben -- Shetty, Jyoti -- Simpson, Anjana J -- Sisk, Ellen -- Tammi, Martti T -- Tarleton, Rick -- Teixeira, Santuza -- Van Aken, Susan -- Vogt, Christy -- Ward, Pauline N -- Wickstead, Bill -- Wortman, Jennifer -- White, Owen -- Fraser, Claire M -- Stuart, Kenneth D -- Andersson, Bjorn -- AI045039/AI/NIAID NIH HHS/ -- AI45038/AI/NIAID NIH HHS/ -- AI45061/AI/NIAID NIH HHS/ -- R01 AI031077/AI/NIAID NIH HHS/ -- R01 AI031077-11/AI/NIAID NIH HHS/ -- U01 AI045038/AI/NIAID NIH HHS/ -- U01 AI045039/AI/NIAID NIH HHS/ -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2005 Jul 15;309(5733):409-15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Parasite Genomics, Institute for Genomic Research, Rockville, MD 20850, USA. nelsayed@tigr.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16020725" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chagas Disease/drug therapy/parasitology ; DNA Repair ; DNA Replication ; DNA, Mitochondrial/genetics ; DNA, Protozoan/genetics ; Genes, Protozoan ; *Genome, Protozoan ; Humans ; Meiosis ; Membrane Proteins/chemistry/genetics/physiology ; Multigene Family ; Protozoan Proteins/chemistry/*genetics/physiology ; Recombination, Genetic ; Repetitive Sequences, Nucleic Acid ; Retroelements ; *Sequence Analysis, DNA ; Signal Transduction ; Telomere/genetics ; Trypanocidal Agents/pharmacology/therapeutic use ; Trypanosoma cruzi/chemistry/*genetics/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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