Search Results - (Author, Cooperation:K. Tucker)

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  1. 1
    Staff View
    Publication Date:
    2013-06-15
    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:
    Bone and Bones/microbiology ; DNA, Bacterial/chemistry/genetics/isolation & purification ; Denmark ; Endemic Diseases/history ; *Evolution, Molecular ; Genome, Bacterial/*genetics ; Great Britain ; History, Medieval ; Humans ; Leprosy/epidemiology/history/*microbiology ; Mycobacterium leprae/*classification/*genetics/isolation & purification ; Mycolic Acids/chemistry ; Phylogeny ; Sweden ; Tooth/microbiology
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2018-12-06
    Publisher:
    Institute of Physics (IOP)
    Electronic ISSN:
    1367-2630
    Topics:
    Physics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Staff View
    Publication Date:
    2011-09-10
    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:
    Adolescent ; Adult ; Animals ; Antibodies, Protozoan/blood/immunology ; Antigens, Protozoan/immunology ; CD8-Positive T-Lymphocytes/*immunology ; Humans ; Injections, Intravenous ; Injections, Subcutaneous ; Interferon-gamma/biosynthesis/immunology ; Liver/*immunology ; Macaca mulatta ; Malaria Vaccines/administration & dosage/adverse effects/*immunology ; Malaria, Falciparum/*prevention & control ; Mice ; Middle Aged ; Plasmodium falciparum/*immunology ; Rabbits ; Sporozoites/*immunology ; Vaccines, Attenuated/administration & dosage/adverse effects/immunology ; Young Adult
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Sage, R. B. ; Tucker, K.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1998
    Staff View
    ISSN:
    1439-0329
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes:
    Insect samples were collected from the canopy of 24 willow short rotation coppice (SRC) sites on farmland in Britain and Ireland in 1995. The blue willow beetle Phratora (= Phyllodecta) vulgatissima (L.) (Coleoptera: Chrysomelidae), previously identified as the main defoliating pest of this crop, was recorded from 13 of these at varying levels of abundance. Data describing aspects of the environment at each site were also collected. These data were used to create potential explanatory variables for a regression analysis of beetle abundance. This analysis indicated that P. vulgatissima were most likely to occur and were more abundant at older willow sites on clay soils and at sites that bad certain free-living willow species growing nearby. Within sites, most willow clones sampled contained P. vulgatissima, although two, Salix burjatica‘Germany’ (‘Aquatica Gigantea’) and Salix mollissima‘Q83’ (Salix triandra × Salix viminalis), were avoided. Chrysomelid pest avoidance and clonal resistance could form part of an integrated pest management strategy for SRC crops.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  5. 5
    LEAN, J. B. ; TUCKER, K. J. ; HOLLAND, B. O. ; THOMSON, T. R.

    [s.l.] : Nature Publishing Group
    Published 1960
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] In contrast to prior investigations3, roast reduction treatments much above 650 C. have led to lower rates of reduction, lower recoveries of magnetite, and less apparent cracking. One reason for this, other than the effect of increased temperature in reducing the tendency of quartz to crack and ...
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  6. 6
    Tucker, K. ; Sanjur, D.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0277-9536
    Keywords:
    Panama ; dietary intake ; maternal employment ; preschool nutrition ; time use
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  7. 7
    Staff View
    ISSN:
    0277-9536
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  8. 8
    Staff View
    ISSN:
    1572-9761
    Keywords:
    Landscape classification ; land cover ; National Vegetation Classification ; spatial scale ; geographical information systems ; environmental impact assessment
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Abstract This paper describes a model which links four levels in an ecological hierarchy using a series of matrices. The four levels are landscape, land cover type, community and species. Each matrix quantifies the probabilistic associations between entities in two adjacent levels in the hierarchy. A landscape classification (1 km resolution) provides a spatial element to the model enabling the distributions of species to be predicted and presented as maps within a geographical information system (GIS). Implementation of the model in Northern England is described. The distributions of 579 species of plants were predicted and compared with data from independent field surveys. The predicted distributions were found to be accurate for 59 % of species. The distributions of rare and non-native (introduced) species of plant were relatively poorly predicted. The potential of this approach to model plant species distributions is discussed.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  9. 9
    Staff View
    ISSN:
    1432-2218
    Keywords:
    Key words: Laparoscopy — Splenectomy — Accessory spleen — Scintigraphy
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract. The recent advent of laparoscopic splenectomy for the treatment of refractory idiopathic thrombocytopenic purpura (ITP) has been embraced by surgeons and hematologists in many institutions. However, the occurrence of accessory splenic tissue in a proportion of such splenectomies, either concurrently or later, raises the question of how to deal with this problem when it arises. We report that the laparoscopic approach, facilitated by lateral positioning, can be successfully used for the treatment of an accessory spleen causing recurrent ITP. The use of intraoperative nuclear imaging can greatly aid the localization and provide confirmation of complete excision of the nuclear focus, especially for a very small accessory spleen.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  10. 10
    Priede, M. A. ; Vanags, J. J. ; Viesturs, U. E. ; Tucker, K. G. ; Bujalski, W. ; Thomas, C. R.

    New York, NY [u.a.] : Wiley-Blackwell
    Published 1995
    Staff View
    ISSN:
    0006-3592
    Keywords:
    Fusarium moniliforme ; hydrodynamics ; image analysis ; kinetic energy ; morphology stirred bioreactor ; Chemistry ; Biochemistry and Biotechnology
    Source:
    Wiley InterScience Backfile Collection 1832-2000
    Topics:
    Biology
    Process Engineering, Biotechnology, Nutrition Technology
    Notes:
    The influence of two mixing geometries (at the same scale) with different flow energy distributions on the performance of the gibberellic acid fermentation and on the morphology of the producing fungus Fusarium moniliforme was investigated. Fermentations were performed using a turbine mixing system (TMS) and a counterflow mixing system (CMS), which were high and low power number mixing systems, respectively. Different agitator speed rate profiles were maintained to obtain equal specific power inputs to both mixing systems. Substantial differences in morphology and productivity of F. moniliforme were found. To investigate the causes of these differences, local values and spectra of the kinetic energy of flow fluctuations were measured during the fermentations using a stirring intensity measuring device (SIMD) and a frequency spectrum analyzer. Biomass and gibberellic acid concentrations were found to be higher in the TMS, where the energy distribution was less even, and Vi/here the main part of the energy was at small frequencies (large eddies). An automated image analysis method was used for quantitative characterization of F. moniliforme freely dispersed mycelia and clump morphology. A higher proportion of clumped mycelia with clumps of larger area, perimeter, and roughness was observed in the TMS. A correlation between the morphology and productivity was found, and TMS favored the development of more productive mycelia with longer and thinner hyphae. Introduced power was not a good parameter to characterize different impellers, even at a given scale. © 1995 John Wiley & Sons, Inc.
    Additional Material:
    10 Ill.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  11. 11
    Olsvik, E. ; Tucker, K. G. ; Thomas, C. R. ; Kristiansen, B.

    New York, NY [u.a.] : Wiley-Blackwell
    Published 1993
    Staff View
    ISSN:
    0006-3592
    Keywords:
    fungus ; rheology ; morphology ; continuous culture ; Chemistry ; Biochemistry and Biotechnology
    Source:
    Wiley InterScience Backfile Collection 1832-2000
    Topics:
    Biology
    Process Engineering, Biotechnology, Nutrition Technology
    Notes:
    Aspergillus niger was grown in a 7-L chemostat at biomass levels of 7 to 9 gL-1; dilution rates of 0.03, 0.05, 0.075, and 0.009 h-1; and dissolved oxygen tensions of 7%, 12%, and 40% of air saturation. Broth rheological measurements were made on-line, while off-line image analysis was used to measure mycelial morphology, including characterization of mycelial aggregates (clumps). Under all conditions, more than 87% of the hyphase were in clumps, the shape of which determined the rheological characteristics of the broth. In particular, the power law consistency index could be correlated with the biomass concentration and the roughness factor of the clumps, which describes their hairiness. A decrease in specific growth rate decreased roughness, possibly due to changes in the amount of clump breakup. However, decreases of roughness with increasing dissolved oxygen tension might rather imply some effect on hyphal-hyphal interactions within the clumps. © 1993 John Wiley & Sons, Inc.
    Additional Material:
    4 Ill.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses