Search Results - (Author, Cooperation:A. Zink)

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  1. 1
    Staff View
    Publication Date:
    2016-01-09
    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:
    Asia ; Chromosome Mapping ; DNA, Bacterial/genetics/isolation & purification ; Europe ; Genome, Bacterial/*genetics ; Helicobacter Infections/*microbiology ; Helicobacter pylori/*genetics/isolation & purification ; Human Migration ; Humans ; *Hybridization, Genetic ; Ice Cover/microbiology ; Mummies/microbiology ; Phylogeny ; Phylogeography ; Sequence Analysis, DNA ; Stomach/*microbiology
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    P. Abbot ; J. Abe ; J. Alcock ; S. Alizon ; J. A. Alpedrinha ; M. Andersson ; J. B. Andre ; M. van Baalen ; F. Balloux ; S. Balshine ; N. Barton ; L. W. Beukeboom ; J. M. Biernaskie ; T. Bilde ; G. Borgia ; M. Breed ; S. Brown ; R. Bshary ; A. Buckling ; N. T. Burley ; M. N. Burton-Chellew ; M. A. Cant ; M. Chapuisat ; E. L. Charnov ; T. Clutton-Brock ; A. Cockburn ; B. J. Cole ; N. Colegrave ; L. Cosmides ; I. D. Couzin ; J. A. Coyne ; S. Creel ; B. Crespi ; R. L. Curry ; S. R. Dall ; T. Day ; J. L. Dickinson ; L. A. Dugatkin ; C. El Mouden ; S. T. Emlen ; J. Evans ; R. Ferriere ; J. Field ; S. Foitzik ; K. Foster ; W. A. Foster ; C. W. Fox ; J. Gadau ; S. Gandon ; A. Gardner ; M. G. Gardner ; T. Getty ; M. A. Goodisman ; A. Grafen ; R. Grosberg ; C. M. Grozinger ; P. H. Gouyon ; D. Gwynne ; P. H. Harvey ; B. J. Hatchwell ; J. Heinze ; H. Helantera ; K. R. Helms ; K. Hill ; N. Jiricny ; R. A. Johnstone ; A. Kacelnik ; E. T. Kiers ; H. Kokko ; J. Komdeur ; J. Korb ; D. Kronauer ; R. Kummerli ; L. Lehmann ; T. A. Linksvayer ; S. Lion ; B. Lyon ; J. A. Marshall ; R. McElreath ; Y. Michalakis ; R. E. Michod ; D. Mock ; T. Monnin ; R. Montgomerie ; A. J. Moore ; U. G. Mueller ; R. Noe ; S. Okasha ; P. Pamilo ; G. A. Parker ; J. S. Pedersen ; I. Pen ; D. Pfennig ; D. C. Queller ; D. J. Rankin ; S. E. Reece ; H. K. Reeve ; M. Reuter ; G. Roberts ; S. K. Robson ; D. Roze ; F. Rousset ; O. Rueppell ; J. L. Sachs ; L. Santorelli ; P. Schmid-Hempel ; M. P. Schwarz ; T. Scott-Phillips ; J. Shellmann-Sherman ; P. W. Sherman ; D. M. Shuker ; J. Smith ; J. C. Spagna ; B. Strassmann ; A. V. Suarez ; L. Sundstrom ; M. Taborsky ; P. Taylor ; G. Thompson ; J. Tooby ; N. D. Tsutsui ; K. Tsuji ; S. Turillazzi ; F. Ubeda ; E. L. Vargo ; B. Voelkl ; T. Wenseleers ; S. A. West ; M. J. West-Eberhard ; D. F. Westneat ; D. C. Wiernasz ; G. Wild ; R. Wrangham ; A. J. Young ; D. W. Zeh ; J. A. Zeh ; A. Zink
    Nature Publishing Group (NPG)
    Published 2011
    Staff View
    Publication Date:
    2011-03-25
    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:
    *Altruism ; Animals ; *Biological Evolution ; Cooperative Behavior ; Female ; Game Theory ; *Genetic Fitness ; Genetics, Population ; Heredity ; Humans ; Male ; *Models, Biological ; Phenotype ; Reproducibility of Results ; *Selection, Genetic ; Sex Ratio
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Ret;Michael F. Allen, Thomas A. Zink

    Cambridge, MA, USA : Blackwell Publishing Inc
    Published 1998
    Staff View
    ISSN:
    1526-100X
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Biology
    Notes:
    The effectiveness of organic mulch as a simple means of enhancing the restoration of disturbed lands by providing a competitive edge to native perennials, such as Artemisia californica (California sagebrush), over exotic annuals, such as Avena fatua (wild oat), was studied by investigating the effect of organic amendments on microbial activity and nitrogen immobilization through both soil analysis and aboveground plant growth. The addition of organic amendment resulted in an increase in microbial activity, a parallel increase in nitrogen immobilization, and no significant differences in total soil nitrogen. It is likely that nitrogen was gradually being removed from its more available form of nitrate and being immobilized in the tissues of the increasing microbial biomass. The survival rate of planted native perennial seedlings of A. californica in organic amended plots was almost double that of control-plot seedlings, and plant volume was significantly higher. When the availability of nitrogen was reduced through increased immobilization, amended plots established an environment more conducive to native perennial shrubs, allowing them to outcompete exotic annuals for water and nutrients. This simple procedure could have major implications for enhancing the restoration of disturbed lands.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1046/j.1526-100x.1998.00617.x

    Articles: DFG German National Licenses
  4. 4
    Staff View
    Publication Date:
    2018-09-06
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Electronic ISSN:
    2375-2548
    Topics:
    Natural Sciences in General
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  5. 5
    HÖFELMANN, M. ; HARTMANN, J. ; ZINK, A. ; SCHREIER, P.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1985
    Staff View
    ISSN:
    1750-3841
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Process Engineering, Biotechnology, Nutrition Technology
    Notes:
    A qualitative screening revealed the occurrence of lipase, esterase, protease, amylase, endo-1,4-β-D-glucanase, xylanase, pectinmethylesterase, polygalacturonase, catalase, β-D-glucosidase and β-D-galactosidase activities in the technical Aspergillus niger enzyme under study (Lipase 2212 D, Röhm). The isolation and purification of lipolytic activities were performed by combination of DEAE-Trisacryl M ion exchange chromatography, Sephadex G 50 gel filtration and hydrophobic chromatography using Phenylsepharose CL-4B. The individual purification steps were checked by specific enzyme visualization in ultrathin agar gels after ultrathin-layer isoelectric focusing (UIEF). Two UIEF homogeneous lipase isoenzymes (I and II) were isolated and characterized by the following parameters: isoelectric points (I: 4.0; II. 3.5); molecular weights (I: 31000 daltons; II: 19000 daltons); carbohydrate contents (I: 6%; II: 9%) and compositions; pH optima (I, II: 5-6); substrate specificities and various effectors.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1365-2621.1985.tb10574.x

    Articles: DFG German National Licenses
  6. 6
    Staff View
    ISSN:
    0303-7207
    Keywords:
    Adenylate cyclase ; C-cell ; Calcitonin secretion ; Cytosolic calcium ; G-protein ; Pertussis toxin ; Somatostatin
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0303-7207(92)90146-W

    Articles: DFG German National Licenses
  7. 7
    Staff View
    ISSN:
    0898-6568
    Keywords:
    Calcitonin secretion ; G-proteins ; calcium channels ; cytosolic calcium ; medullary thyroid carcinoma ; pertussis toxin ; rat ce line rMTC 44-2 ; somatostatin
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0898-6568(92)90009-W

    Articles: DFG German National Licenses
  8. 8
    Visocekas, R. ; Spooner, N.A. ; Zink, A. ; Blanc, P.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    1350-4487
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Electrical Engineering, Measurement and Control Technology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/1350-4487(94)90067-1

    Articles: DFG German National Licenses
  9. 9
    Staff View
    ISSN:
    0303-7207
    Keywords:
    Calcitonin receptor, internalization ; Chloroquine ; Monensin ; T"47D cell
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0303-7207(88)90048-2

    Articles: DFG German National Licenses
  10. 10
    Zink, A.
    Springer
    Published 1937
    Staff View
    ISSN:
    1432-2307
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Zusammenfassung Es wird ein Fall von trichterförmiger Tricuspidalklappe bei einem 19jährigen Manne beschrieben, 5 ähnliche bisher veröffentlichte Fälle angeführt und ihre gemeinsamen Merkmale herausgestellt. Daraus ergibt sich, daß wir es mit einer Mißbildung zu tun haben dürften, der eine ganz bestimmte Entwicklungsmechanik zugrunde liegt. Nach Darlegung der verschiedenen Ansichten über die Entwicklung der Tricuspidalis wird der Versuch einer Deutung im Sinne derSpitzerschen Theorie unternommen.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02084472

    Articles: DFG German National Licenses
  11. 11
    DONALDSON, J. ; MAGNUSON, K. ; McHUGH, L. ; NINER, R. ; WATT, F. ; WILLIAMS, B. ; ZINK, A.

    Provincetown, Mass., etc. : Periodicals Archive Online (PAO)
    Published 1959
    Staff View
    ISSN:
    0022-3980
    Topics:
    Psychology
    URL:
    http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:1140-1959-000-00-000017

    Articles: DFG German National Licenses
  12. 12
    Kunz, R. ; Zink, A.
    Springer
    Published 2000
    Staff View
    ISSN:
    0340-1855
    Keywords:
    Schlüsselwörter Bias –¶Confounding – Studiendesign –¶kontrollierte klinische Studie –¶Beobachtungsstudie ; Key words Bias – confounding –¶study design –¶controlled clinical trial –¶observational studies
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Description / Table of Contents:
    Summary The validity of clinical patient-oriented research is always threatened by the influence of bias, confounding factors or random effects that might distort the results. However, the susceptibility to distortion varies between different study designs. The best protection against spurious relationships or distorted results are specific focused research questions and rigorous integration of sound study methodology during the design and performance phase.
    Notes:
    Zusammenfassung Bei der klinischen Patienten-orientierten Forschung spielen bekannte und unbekannte Faktoren, die durch Bias, Confounding und Zufall Einfluß auf das Ergebnis nehmen können, eine nicht unerhebliche Rolle. Die gängigen Studientypen sind dieser Gefahr in unterschiedlichem Maße ausgesetzt. Nur durch die Bearbeitung fokusierter Fragestellungen und eine konsequente Integration methodischer Regeln aus der klinisch-epidemiologischen Forschung in der Planungs- und Durchführungsphase läßt sich falschen Ergebnissen angemessen vorbeugen.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s003930050006

    Articles: DFG German National Licenses
  13. 13
    Zink, A.
    Springer
    Published 1998
    Staff View
    ISSN:
    0340-1855
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s003930050098

    Articles: DFG German National Licenses
  14. 14
    Listing, J. ; Zink, A. ; Brauer, D.
    Springer
    Published 1998
    Staff View
    ISSN:
    0340-1855
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s003930050103

    Articles: DFG German National Licenses
  15. 15
    Staff View
    ISSN:
    0340-1855
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s003930050106

    Articles: DFG German National Licenses
  16. 16
    Zink, A.
    Springer
    Published 1936
    Staff View
    ISSN:
    1432-1750
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Zusammenfassung In Versuchen, die den biologischen und klimatischen Bedingungen weitgehendst angepaßt waren, konnte nachgewiesen werden, daß in einem auf die Straße gespuckten und der Sonne ausgesetztem, ungewöhnlich infektiösem Sputum nach frühestens 2, längstens 5 Stunden keine wachstumsfähigen Tuberkelbacillen mehr nachzuweisen sind. Im Durchschnitt wuchsen auf dem beimpften Nährboden nach 4 Stunden keine Kolonien mehr. Die baktericide Kraft der Sonnenstrahlung konnte in erster Linie auf die Ultraviolettstrahlen zurückgeführt werden, wie durch Kühlung sowie Versuche in größerer Höhe und unter der Quecksilberdampflampe dargetan werden konnte. Diese Wirkung wird erheblich verstärkt durch die von Sand und Makadam in der Sonne aufgespeicherte Wärme. Es konnte ferner bewiesen werden, daß insbesondere bei höheren Temperaturen (etwa ab 55°C) die Tuberkelbacillen durch die feuchte Hitze wesentlich schneller abgetötet werden, ehe noch die ultraviolette Strahlung zur vollen baktericiden Wirkung kommen kann. Die Strahlung im Hochgebirge zeichnet sich durch ihre besonders günstige keimtötende Wirkung aus, bedingt vor allem durch ihre größere Intensität und ihren größeren Gehalt an Ultraviolett und kurzwelligen Strahlen.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02139535

    Articles: DFG German National Licenses
  17. 17
    Zink, A. G. ; Pelikane, P. J. ; Shuler, C. E.
    Springer
    Published 1994
    Staff View
    ISSN:
    1432-5225
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes:
    Summary The ultrastructural characteristics of fracture surfaces from southern pine and Douglas-fir specimens tested in tension at various angles to grain were examined. The fracture surace morphology was inspected using scanning electron microscopy. Three anatomical failure types were recognized: intercell failure, transwall failure, and intrawall failure. Certain failure characteristics were ascribed as a function of the magnitudes of paralleland perpendicular-tograin tension and parallel-to-grain shear present in the specimen. In specimens tested in paralleland perpendicular-to-grain tension, the thick-walled latewood cells were found to fail in a combination of transwall and intrawall failure. The intrawall failures were usually at the S1–S2 interface. The more thin-walled earlywood cells were more likely to exhibit abrupt, transwall failures. At intermediate angles of load to grain, surfaces indicative of the type found in pure shear tests were predominant. Perpendicularto-grain tension failures resulted in mostly intercell failures. Ray cells consistently exhibited transwall failures. The failure surface frequently changed planes in all loading modes. This path transfer was inevidably associated with material discontinuities in the wood. When the path did transfer, all three failure types were observed. No significant species effect was observed.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00195280

    Articles: DFG German National Licenses
  18. 18
    Zink, A. G. ; Pellicane, P. J. ; Anthony, R. W.
    Springer
    Published 1995
    Staff View
    ISSN:
    1432-5225
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes:
    Summary A simple model, based on the use of transformations of second-order tensors, is presented in this paper to predict the failure mode of wood members stressed in various degrees of parallel-and perpendicular-to-grain tension and parallel-to-grain shear. This type of loading is indicative of structural wood members with cross grain or grain deviations in the vicinity of knots subjected to bending or tension. The model is based on the assumptions that failure is dictated by the presence of any of the aforementioned stresses that exceed the clear wood strength in that mode and that failure does not result from stress interactions. The magnitudes of the applied stresses are normalized relative to the wood strength in that mode. The ratio of applied stress to material strength that is greatest at any particular angle of load to grain is presumed to be the failure mode at that angle. To verify model predictions, optical and microscopic analyses of surfaces of failed specimens loaded in uniaxial tension at angles between 0° and 90° to grain were compared to previously obtained, or otherwise known, surfaces of specimens tested in tension and shear. Specimens tested at various angles to grain demonstrated failed surfaces very much like those associated with specimens loaded in the modes predicted by the model.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00195265

    Articles: DFG German National Licenses