Search Results - (Author, Cooperation:G. McMahon)

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  1. 1
    C. A. Rietveld ; S. E. Medland ; J. Derringer ; J. Yang ; T. Esko ; N. W. Martin ; H. J. Westra ; K. Shakhbazov ; A. Abdellaoui ; A. Agrawal ; E. Albrecht ; B. Z. Alizadeh ; N. Amin ; J. Barnard ; S. E. Baumeister ; K. S. Benke ; L. F. Bielak ; J. A. Boatman ; P. A. Boyle ; G. Davies ; C. de Leeuw ; N. Eklund ; D. S. Evans ; R. Ferhmann ; K. Fischer ; C. Gieger ; H. K. Gjessing ; S. Hagg ; J. R. Harris ; C. Hayward ; C. Holzapfel ; C. A. Ibrahim-Verbaas ; E. Ingelsson ; B. Jacobsson ; P. K. Joshi ; A. Jugessur ; M. Kaakinen ; S. Kanoni ; J. Karjalainen ; I. Kolcic ; K. Kristiansson ; Z. Kutalik ; J. Lahti ; S. H. Lee ; P. Lin ; P. A. Lind ; Y. Liu ; K. Lohman ; M. Loitfelder ; G. McMahon ; P. M. Vidal ; O. Meirelles ; L. Milani ; R. Myhre ; M. L. Nuotio ; C. J. Oldmeadow ; K. E. Petrovic ; W. J. Peyrot ; O. Polasek ; L. Quaye ; E. Reinmaa ; J. P. Rice ; T. S. Rizzi ; H. Schmidt ; R. Schmidt ; A. V. Smith ; J. A. Smith ; T. Tanaka ; A. Terracciano ; M. J. van der Loos ; V. Vitart ; H. Volzke ; J. Wellmann ; L. Yu ; W. Zhao ; J. Allik ; J. R. Attia ; S. Bandinelli ; F. Bastardot ; J. Beauchamp ; D. A. Bennett ; K. Berger ; L. J. Bierut ; D. I. Boomsma ; U. Bultmann ; H. Campbell ; C. F. Chabris ; L. Cherkas ; M. K. Chung ; F. Cucca ; M. de Andrade ; P. L. De Jager ; J. E. De Neve ; I. J. Deary ; G. V. Dedoussis ; P. Deloukas ; M. Dimitriou ; G. Eiriksdottir ; M. F. Elderson ; J. G. Eriksson ; D. M. Evans ; J. D. Faul ; L. Ferrucci ; M. E. Garcia ; H. Gronberg ; V. Guethnason ; P. Hall ; J. M. Harris ; T. B. Harris ; N. D. Hastie ; A. C. Heath ; D. G. Hernandez ; W. Hoffmann ; A. Hofman ; R. Holle ; E. G. Holliday ; J. J. Hottenga ; W. G. Iacono ; T. Illig ; M. R. Jarvelin ; M. Kahonen ; J. Kaprio ; R. M. Kirkpatrick ; M. Kowgier ; A. Latvala ; L. J. Launer ; D. A. Lawlor ; T. Lehtimaki ; J. Li ; P. Lichtenstein ; P. Lichtner ; D. C. Liewald ; P. A. Madden ; P. K. Magnusson ; T. E. Makinen ; M. Masala ; M. McGue ; A. Metspalu ; A. Mielck ; M. B. Miller ; G. W. Montgomery ; S. Mukherjee ; D. R. Nyholt ; B. A. Oostra ; L. J. Palmer ; A. Palotie ; B. W. Penninx ; M. Perola ; P. A. Peyser ; M. Preisig ; K. Raikkonen ; O. T. Raitakari ; A. Realo ; S. M. Ring ; S. Ripatti ; F. Rivadeneira ; I. Rudan ; A. Rustichini ; V. Salomaa ; A. P. Sarin ; D. Schlessinger ; R. J. Scott ; H. Snieder ; B. St Pourcain ; J. M. Starr ; J. H. Sul ; I. Surakka ; R. Svento ; A. Teumer ; H. Tiemeier ; F. J. van Rooij ; D. R. Van Wagoner ; E. Vartiainen ; J. Viikari ; P. Vollenweider ; J. M. Vonk ; G. Waeber ; D. R. Weir ; H. E. Wichmann ; E. Widen ; G. Willemsen ; J. F. Wilson ; A. F. Wright ; D. Conley ; G. Davey-Smith ; L. Franke ; P. J. Groenen ; M. Johannesson ; S. L. Kardia ; R. F. Krueger ; D. Laibson ; N. G. Martin ; M. N. Meyer ; D. Posthuma ; A. R. Thurik ; N. J. Timpson ; A. G. Uitterlinden ; C. M. van Duijn ; P. M. Visscher ; D. J. Benjamin ; D. Cesarini ; P. D. Koellinger
    American Association for the Advancement of Science (AAAS)
    Published 2013
    Staff View
    Publication Date:
    2013-06-01
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Cognition ; *Educational Status ; Endophenotypes ; Female ; Genetic Loci ; *Genome-Wide Association Study ; Humans ; Male ; Multifactorial Inheritance ; *Polymorphism, Single Nucleotide
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    J. R. Perry ; F. Day ; C. E. Elks ; P. Sulem ; D. J. Thompson ; T. Ferreira ; C. He ; D. I. Chasman ; T. Esko ; G. Thorleifsson ; E. Albrecht ; W. Q. Ang ; T. Corre ; D. L. Cousminer ; B. Feenstra ; N. Franceschini ; A. Ganna ; A. D. Johnson ; S. Kjellqvist ; K. L. Lunetta ; G. McMahon ; I. M. Nolte ; L. Paternoster ; E. Porcu ; A. V. Smith ; L. Stolk ; A. Teumer ; N. Tsernikova ; E. Tikkanen ; S. Ulivi ; E. K. Wagner ; N. Amin ; L. J. Bierut ; E. M. Byrne ; J. J. Hottenga ; D. L. Koller ; M. Mangino ; T. H. Pers ; L. M. Yerges-Armstrong ; J. Hua Zhao ; I. L. Andrulis ; H. Anton-Culver ; F. Atsma ; S. Bandinelli ; M. W. Beckmann ; J. Benitez ; C. Blomqvist ; S. E. Bojesen ; M. K. Bolla ; B. Bonanni ; H. Brauch ; H. Brenner ; J. E. Buring ; J. Chang-Claude ; S. Chanock ; J. Chen ; G. Chenevix-Trench ; J. M. Collee ; F. J. Couch ; D. Couper ; A. D. Coviello ; A. Cox ; K. Czene ; P. D'Adamo A ; G. Davey Smith ; I. De Vivo ; E. W. Demerath ; J. Dennis ; P. Devilee ; A. K. Dieffenbach ; A. M. Dunning ; G. Eiriksdottir ; J. G. Eriksson ; P. A. Fasching ; L. Ferrucci ; D. Flesch-Janys ; H. Flyger ; T. Foroud ; L. Franke ; M. E. Garcia ; M. Garcia-Closas ; F. Geller ; E. E. de Geus ; G. G. Giles ; D. F. Gudbjartsson ; V. Gudnason ; P. Guenel ; S. Guo ; P. Hall ; U. Hamann ; R. Haring ; C. A. Hartman ; A. C. Heath ; A. Hofman ; M. J. Hooning ; J. L. Hopper ; F. B. Hu ; D. J. Hunter ; D. Karasik ; D. P. Kiel ; J. A. Knight ; V. M. Kosma ; Z. Kutalik ; S. Lai ; D. Lambrechts ; A. Lindblom ; R. Magi ; P. K. Magnusson ; A. Mannermaa ; N. G. Martin ; G. Masson ; P. F. McArdle ; W. L. McArdle ; M. Melbye ; K. Michailidou ; E. Mihailov ; L. Milani ; R. L. Milne ; H. Nevanlinna ; P. Neven ; E. A. Nohr ; A. J. Oldehinkel ; B. A. Oostra ; A. Palotie ; M. Peacock ; N. L. Pedersen ; P. Peterlongo ; J. Peto ; P. D. Pharoah ; D. S. Postma ; A. Pouta ; K. Pylkas ; P. Radice ; S. Ring ; F. Rivadeneira ; A. Robino ; L. M. Rose ; A. Rudolph ; V. Salomaa ; S. Sanna ; D. Schlessinger ; M. K. Schmidt ; M. C. Southey ; U. Sovio ; M. J. Stampfer ; D. Stockl ; A. M. Storniolo ; N. J. Timpson ; J. Tyrer ; J. A. Visser ; P. Vollenweider ; H. Volzke ; G. Waeber ; M. Waldenberger ; H. Wallaschofski ; Q. Wang ; G. Willemsen ; R. Winqvist ; B. H. Wolffenbuttel ; M. J. Wright ; D. I. Boomsma ; M. J. Econs ; K. T. Khaw ; R. J. Loos ; M. I. McCarthy ; G. W. Montgomery ; J. P. Rice ; E. A. Streeten ; U. Thorsteinsdottir ; C. M. van Duijn ; B. Z. Alizadeh ; S. Bergmann ; E. Boerwinkle ; H. A. Boyd ; L. Crisponi ; P. Gasparini ; C. Gieger ; T. B. Harris ; E. Ingelsson ; M. R. Jarvelin ; P. Kraft ; D. Lawlor ; A. Metspalu ; C. E. Pennell ; P. M. Ridker ; H. Snieder ; T. I. Sorensen ; T. D. Spector ; D. P. Strachan ; A. G. Uitterlinden ; N. J. Wareham ; E. Widen ; M. Zygmunt ; A. Murray ; D. F. Easton ; K. Stefansson ; J. M. Murabito ; K. K. Ong
    Nature Publishing Group (NPG)
    Published 2014
    Staff View
    Publication Date:
    2014-09-19
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Adolescent ; Age Factors ; *Alleles ; Body Mass Index ; Breast Neoplasms/genetics ; Cardiovascular Diseases/genetics ; Child ; Diabetes Mellitus, Type 2/genetics ; Europe/ethnology ; Female ; Genetic Loci/*genetics ; Genome-Wide Association Study ; Genomic Imprinting/genetics ; Humans ; Hypothalamo-Hypophyseal System/physiology ; Intercellular Signaling Peptides and Proteins/genetics ; Male ; Membrane Proteins/genetics ; Menarche/*genetics ; Obesity/genetics ; Ovary/physiology ; *Parents ; Polymorphism, Single Nucleotide/genetics ; Potassium Channels, Tandem Pore Domain/genetics ; Proteins/genetics ; Quantitative Trait Loci/genetics ; Receptors, GABA-B/metabolism ; Receptors, Retinoic Acid/metabolism ; Ribonucleoproteins/genetics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    A. Okbay ; J. P. Beauchamp ; M. A. Fontana ; J. J. Lee ; T. H. Pers ; C. A. Rietveld ; P. Turley ; G. B. Chen ; V. Emilsson ; S. F. Meddens ; S. Oskarsson ; J. K. Pickrell ; K. Thom ; P. Timshel ; R. de Vlaming ; A. Abdellaoui ; T. S. Ahluwalia ; J. Bacelis ; C. Baumbach ; G. Bjornsdottir ; J. H. Brandsma ; M. Pina Concas ; J. Derringer ; N. A. Furlotte ; T. E. Galesloot ; G. Girotto ; R. Gupta ; L. M. Hall ; S. E. Harris ; E. Hofer ; M. Horikoshi ; J. E. Huffman ; K. Kaasik ; I. P. Kalafati ; R. Karlsson ; A. Kong ; J. Lahti ; S. J. van der Lee ; C. deLeeuw ; P. A. Lind ; K. O. Lindgren ; T. Liu ; M. Mangino ; J. Marten ; E. Mihailov ; M. B. Miller ; P. J. van der Most ; C. Oldmeadow ; A. Payton ; N. Pervjakova ; W. J. Peyrot ; Y. Qian ; O. Raitakari ; R. Rueedi ; E. Salvi ; B. Schmidt ; K. E. Schraut ; J. Shi ; A. V. Smith ; R. A. Poot ; B. St Pourcain ; A. Teumer ; G. Thorleifsson ; N. Verweij ; D. Vuckovic ; J. Wellmann ; H. J. Westra ; J. Yang ; W. Zhao ; Z. Zhu ; B. Z. Alizadeh ; N. Amin ; A. Bakshi ; S. E. Baumeister ; G. Biino ; K. Bonnelykke ; P. A. Boyle ; H. Campbell ; F. P. Cappuccio ; G. Davies ; J. E. De Neve ; P. Deloukas ; I. Demuth ; J. Ding ; P. Eibich ; L. Eisele ; N. Eklund ; D. M. Evans ; J. D. Faul ; M. F. Feitosa ; A. J. Forstner ; I. Gandin ; B. Gunnarsson ; B. V. Halldorsson ; T. B. Harris ; A. C. Heath ; L. J. Hocking ; E. G. Holliday ; G. Homuth ; M. A. Horan ; J. J. Hottenga ; P. L. de Jager ; P. K. Joshi ; A. Jugessur ; M. A. Kaakinen ; M. Kahonen ; S. Kanoni ; L. Keltigangas-Jarvinen ; L. A. Kiemeney ; I. Kolcic ; S. Koskinen ; A. T. Kraja ; M. Kroh ; Z. Kutalik ; A. Latvala ; L. J. Launer ; M. P. Lebreton ; D. F. Levinson ; P. Lichtenstein ; P. Lichtner ; D. C. Liewald ; A. Loukola ; P. A. Madden ; R. Magi ; T. Maki-Opas ; R. E. Marioni ; P. Marques-Vidal ; G. A. Meddens ; G. McMahon ; C. Meisinger ; T. Meitinger ; Y. Milaneschi ; L. Milani ; G. W. Montgomery ; R. Myhre ; C. P. Nelson ; D. R. Nyholt ; W. E. Ollier ; A. Palotie ; L. Paternoster ; N. L. Pedersen ; K. E. Petrovic ; D. J. Porteous ; K. Raikkonen ; S. M. Ring ; A. Robino ; O. Rostapshova ; I. Rudan ; A. Rustichini ; V. Salomaa ; A. R. Sanders ; A. P. Sarin ; H. Schmidt ; R. J. Scott ; B. H. Smith ; J. A. Smith ; J. A. Staessen ; E. Steinhagen-Thiessen ; K. Strauch ; A. Terracciano ; M. D. Tobin ; S. Ulivi ; S. Vaccargiu ; L. Quaye ; F. J. van Rooij ; C. Venturini ; A. A. Vinkhuyzen ; U. Volker ; H. Volzke ; J. M. Vonk ; D. Vozzi ; J. Waage ; E. B. Ware ; G. Willemsen ; J. R. Attia ; D. A. Bennett ; K. Berger ; L. Bertram ; H. Bisgaard ; D. I. Boomsma ; I. B. Borecki ; U. Bultmann ; C. F. Chabris ; F. Cucca ; D. Cusi ; I. J. Deary ; G. V. Dedoussis ; C. M. van Duijn ; J. G. Eriksson ; B. Franke ; L. Franke ; P. Gasparini ; P. V. Gejman ; C. Gieger ; H. J. Grabe ; J. Gratten ; P. J. Groenen ; V. Gudnason ; P. van der Harst ; C. Hayward ; D. A. Hinds ; W. Hoffmann ; E. Hypponen ; W. G. Iacono ; B. Jacobsson ; M. R. Jarvelin ; K. H. Jockel ; J. Kaprio ; S. L. Kardia ; T. Lehtimaki ; S. F. Lehrer ; P. K. Magnusson ; N. G. Martin ; M. McGue ; A. Metspalu ; N. Pendleton ; B. W. Penninx ; M. Perola ; N. Pirastu ; M. Pirastu ; O. Polasek ; D. Posthuma ; C. Power ; M. A. Province ; N. J. Samani ; D. Schlessinger ; R. Schmidt ; T. I. Sorensen ; T. D. Spector ; K. Stefansson ; U. Thorsteinsdottir ; A. R. Thurik ; N. J. Timpson ; H. Tiemeier ; J. Y. Tung ; A. G. Uitterlinden ; V. Vitart ; P. Vollenweider ; D. R. Weir ; J. F. Wilson ; A. F. Wright ; D. C. Conley ; R. F. Krueger ; G. Davey Smith ; A. Hofman ; D. I. Laibson ; S. E. Medland ; M. N. Meyer ; M. Johannesson ; P. M. Visscher ; T. Esko ; P. D. Koellinger ; D. Cesarini ; D. J. Benjamin
    Nature Publishing Group (NPG)
    Published 2016
    Staff View
    Publication Date:
    2016-05-27
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Staff View
    Publication Date:
    2011-07-02
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  5. 5
    McMahon, G.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0047-2727
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Economics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0047-2727(90)90046-K

    Articles: DFG German National Licenses
  6. 6
    McMahon, G. ; Landau, J.V.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0167-4781
    Keywords:
    (E. coli) ; Pressure effect ; Protein synthesis ; Ribosomal protein ; Streptomycin ; Translation
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0167-4781(83)90035-0

    Articles: DFG German National Licenses
  7. 7
    McMahon, G.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0304-3878
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Political Science
    Economics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0304-3878(89)90016-3

    Articles: DFG German National Licenses
  8. 8
    McMahon, G.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0305-750X
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Geography
    Political Science
    Sociology
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0305-750X(88)90022-8

    Articles: DFG German National Licenses
  9. 9
    McMahon, G. ; Alsina, J.L. ; Levy, S.B.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0014-4827
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1016/0014-4827(85)90131-4

    Articles: DFG German National Licenses
  10. 10
    McMahon, G.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0738-0593
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Education
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0738-0593(91)90043-8

    Articles: DFG German National Licenses
  11. 11
    Staff View
    ISSN:
    1572-9451
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Electrical Engineering, Measurement and Control Technology
    Notes:
    Abstract In this paper we demonstrate success with an implementation of a genetic algorithm, integrated with linear programming, for solving a minimum cost network synthesis problem. The problem is formulated to include a number of practical constraints and the technique applied to moderately large networks (50 nodes). The associated linear program may be large but successful methods have been developed with very small population sizes for the genetic algorithm.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1023/A:1019102930443

    Articles: DFG German National Licenses
  12. 12
    McMahon, G. ; Harned, D. A.
    Springer
    Published 1998
    Staff View
    ISSN:
    1432-1009
    Keywords:
    KEY WORDS: Environmental setting; Water quality; Watershed management; Nutrients; Sediment
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s002679900156

    Articles: DFG German National Licenses
  13. 13
    McMahon, G. ; Carpenter, G. J. C. ; Malis, T. F.
    Springer
    Published 1991
    Staff View
    ISSN:
    1573-4803
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes:
    Abstract The microstructure of SiC whiskers has been studied through analytical electron microscopy. The whiskers were found to contain discrete regions of high and low planar defect density. These regions of low defect density were identified as 3C beta-SiC, whereas the regions of high defect density were consistent with a mixture of SiC polytypes, with the 3C and the 6H polytypes being the most predominant as a result of the formation of a high density of microtwins on the (1 1 1) planes perpendicular to the 〈1 1 1〉 growth direction. A growth mechanism is suggested based on observations of (a) outer layers of SiC on vapour-liquid-solid catalysts and (b) C∶Si variations between the regions of high and low densities of planar defects. It appears that there is some degree of stoichiometric control over the microstructure of the SiC whiskers in that slight carbon enrichments seem to promote the growth of relatively defect-free regions of beta-SiC whiskers.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00553671

    Articles: DFG German National Licenses
  14. 14
    McMahon, G. ; Carpenter, G. J. C. ; Malis, T. F.
    Springer
    Published 1991
    Staff View
    ISSN:
    1573-4803
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes:
    Abstract The microstructure of SiC whiskers has been studied through analytical electron microscopy. The whiskers were found to contain discrete regions of high and low planar defect density. These regions of low defect density were identified as 3C beta-SiC, whereas the regions of high defect density were consistent with a mixture of SiC polytypes, with the 3C and the 6H polytypes being the most predominant as a result of the formation of a high density of microtwins on the (1 1 1) planes perpendicular to the 〈1 1 1〉 growth direction. A growth mechanism is suggested based on observations of (a) outer layers of SiC on vapour-liquid-solid catalysts and (b) C∶Si variations between the regions of high and low densities of planar defects. It appears that there is some degree of stoichiometric control over the microstructure of the SiC whiskers in that slight carbon enrichments seem to promote the growth of relatively defect-free regions of beta-SiC whiskers.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02403970

    Articles: DFG German National Licenses
  15. 15
    McMahon, G. ; Erb, U.
    Springer
    Published 1989
    Staff View
    ISSN:
    1573-4811
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01730163

    Articles: DFG German National Licenses
  16. 16
    Staff View
    ISSN:
    1572-9540
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract Using the 93.31 keV Mössbauer transition in67Zn we have investigated hyperfine interactions and lattice-dynamic effects of nanostructured hexagonal (wurtzite) ZnO. The nanocrystals with particle sizes between 3 and 30 ran were produced by a reactive-gas sublimation method and were subsequently compacted into solid bodies under external pressure. The nanocrystalline materials were used as sources in Mössbauer emission experiments. A drastic increase of the asymmetry parameter was found fromη=0 (single crystal) toη≈0.5 (nanostructured material). Our theoretical Hartree-Fock cluster calculations show that displacements of the Zn atoms off the hexagonal symmetry axis as small as 0.005 Å can lead to such enhancedη parameters. The Lamb-Mössbauer factorf drastically drops when the particle size is reduced below ∼ 10 nm. Two lattice-dynamic models are discussed which successfully describe this behavior.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02146317

    Articles: DFG German National Licenses
  17. 17
    McMahon, G. ; Malis, T.

    New York, NY [u.a.] : Wiley-Blackwell
    Published 1995
    Staff View
    ISSN:
    1059-910X
    Keywords:
    Preparation technique ; Artefacts ; Sectioning-induced texture ; Life and Medical Sciences ; Cell & Developmental Biology
    Source:
    Wiley InterScience Backfile Collection 1832-2000
    Topics:
    Natural Sciences in General
    Notes:
    The methodology and one of the first attempts to produce transmission electron microscopic (TEM) specimens of nanocrystalline metals, alloys and ceramics by ultramicrotomy are presented. Samples of the pure elements Co, Pd; alloys of Y-12 at.% Fe, Al-7 at.% Ag and W-30 at.% Ga; and ZnO ceramic, were found to section successfully to varying degrees. Advantages of sections prepared through ultramicrotomy over ion beam methods include extensive electron-transparent regions of uniform thickness and absence of ion beam damage. Typical artefacts were observed (knife marks, tearing, pull-out, shear lamellae, section curling, and anodic dissolution) but did not impede TEM analysis significantly. A potentially important effect observed was that of a texture development upon sectioning of the Co and Pd samples. It is thought that this unusual phenomenon results from the extremely fine scale of the microstructure and the purity of the Co and Pd samples, and may be enhanced by frictional heating effects and the state of the knife edge. © 1995 Government of Canada.Exclusive worldwide publication rights in the article have been transferred to Wiley-Liss, Inc., in perpetuity.
    Additional Material:
    12 Ill.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1002/jemt.1070310403

    Articles: DFG German National Licenses