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  • 1
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    Biogeography of key mesozooplankton species in the North Atlantic and egg production of Calanus finmarchicus (2015)
    Earth System Science Data
    In:  EPIC3Earth System Science Data, Earth System Science Data, 7(2), pp. 223-230, ISSN: 1866-3508
    Details
    Publication Date: 2017-01-20
    Description: Here we present a new, pan-North-Atlantic compilation of data on key mesozooplankton species, including the most important copepod, Calanus finmarchicus. Distributional data of eight representative zooplankton taxa, from recent (2000-2009) Continuous Plankton Recorder data, are presented, along with basin-scale data of the phytoplankton colour index. Then we present a compilation of data on C. finmarchicus, including observations of abundance, demography, egg production and female size, with accompanying data on temperature and chlorophyll.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 2
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    The North Atlantic Ocean as habitat for Calanus finmarchicus: environmental factors and life history traits (2014)
    PERGAMON-ELSEVIER SCIENCE LTD
    In:  EPIC3Progress In Oceanography, PERGAMON-ELSEVIER SCIENCE LTD, 129(Part B), pp. 244-284, ISSN: 0079-6611
    Details
    Publication Date: 2014-12-10
    Description: Here we present a new, pan-Atlantic compilation and analysis of data on Calanus finmarchicus abundance, demography, dormancy, egg production and mortality in relation to basin-scale patterns of temperature, phytoplankton biomass, circulation and other environmental characteristics in the context of understanding factors determining the distribution and abundance of C. finmarchicus across its North Atlantic habitat. A number of themes emerge: (1) the south-to-north transport of plankton in the northeast Atlantic contrasts with north-to-south transport in the western North Atlantic, which has implications for understanding population responses of C. finmarchicus to climate forcing, (2) recruitment to the youngest copepodite stages occurs during or just after the phytoplankton bloom in the east whereas it occurs after the bloom at many western sites, with up to 3.5 months difference in recruitment timing, (3) the deep basin and gyre of the southern Norwegian Sea is the centre of production and overwintering of C. finmarchicus, upon which the surrounding waters depend, whereas, in the Labrador/Irminger Seas production mainly occurs along the margins, such that the deep basins serve as collection areas and refugia for the overwintering populations, rather than as centres of production, (4) the western North Atlantic marginal seas have an important role in sustaining high C. finmarchicus abundance on the nearby coastal shelves, (5) differences in mean temperature and chlorophyll concentration between the western and eastern North Atlantic are reflected in regional differences in female body size and egg production, (6) regional differences in functional responses of egg production rate may reflect genetic differences between western and eastern populations, (7) dormancy duration is generally shorter in the deep waters adjacent to the lower latitude western North Atlantic shelves than in the east, (8) there are differences in stage-specific daily mortality rates between eastern and western shelves and basins, but the survival trajectories for cohort development from CI to CV are similar, and (9) early life stage survival is much lower in regions where C. finmarchicus is found with its congeners, C. glacialis and/or C. hyperboreus. This compilation and analysis provides new knowledge for evaluation and parameterisation of population models of C. finmarchicus and their responses to climate change in the North Atlantic. The strengths and weaknesses of modeling approaches, including a statistical approach based on ecological niche theory and a dynamical approach based on knowledge of spatial population dynamics and life history, are discussed, as well as needs for further research.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 3
    Electronic Resource
    Electronic Resource
    A variable narrow bandpass optically stimulated luminescence system for quaternary geochronology
    Amsterdam : Elsevier
    Radiation Measurements 23 (1994), S. 533-535 
    Details
    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)90094-9
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  • 4
    Electronic Resource
    Electronic Resource
    Gamma Globulin Production and Antibody Synthesis in Chickens bursectomized as Embryos (1968)
    [s.l.] : Nature Publishing Group
    Nature 217 (1968), S. 358-360 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In these experiments with embryonic bursoctomy, we show that the role of the bursa in development of a competent immunoglobul in -producing cell system is a sequential process in a qualitative way: bursal support of development of capacity for 7S immunoglobul in synthesis occurs after the integrity ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/217358a0
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  • 5
    Electronic Resource
    Electronic Resource
    The susceptibility to Armillaria mellea of different Prunus species used as stone fruit rootstocks
    Amsterdam : Elsevier
    Scientia Horticulturae 46 (1991), S. 43-54 
    Details
    ISSN: 0304-4238
    Keywords: Armillaria ; almond ; fruit trees ; peach ; root rots of trees ; root stocks
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0304-4238(91)90091-C
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  • 6
    Electronic Resource
    Electronic Resource
    Duration of Embryonic Hypersensitivity and its Relation to the Level of Differentiation of the Chick (1964)
    [s.l.] : Nature Publishing Group
    Nature 204 (1964), S. 797-798 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In order to determine if the tissue-bound hapto-antibodies possessed this anaphylactogenic property transiently or permanently, the following experiments were carried out. Embryonic chicks were injected intravenously with 4 mg of human y-globulin. One group was injected with antigen on the 12th ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/204797a0
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  • 7
    Electronic Resource
    Electronic Resource
    Amerikaansche Spoorwegen (1888)
    Springer
    De economist 37 (1888), S. 549-576 
    Details
    ISSN: 1572-9982
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02213340
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  • 8
    Electronic Resource
    Electronic Resource
    Influence de la structure et de la longueur des chaines d'alcools sur les propriétés plastifiantes des phtalates correspondants (1974)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 38 (1974), S. 167-189 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Ausgehend von Alkoholen verschiedener Struktur und veränderlicher Kettenlänge wurde eine Serie von Phthalaten hergestellt. Ein Teil dieser Alkohole wurde durch selektive Hydroformylierung synthetisiert.Die für die Synthese dieser Alkohole gewählten Strukturparameter beziehen sich auf die Art der Verzweigung des Kohlenstoffskeletts: Einerseits die Länge und die Anzahl der Seitenketten, andererseits die Stellung dieser Ketten bezogen auf die Alkoholfunktion. Die Anzahl der Kohlenstoffatome der dargestellten Ketten variiert zwischen 6 und 13.Die physikalisch-chemischen Eigenschaften (spezifisches Volumen, Übergang in den Glaszustand, Viskosität) der aus diesen Alkoholen erhaltenen symmetrischen Diphthalate werden in Abhängigkeit von der Konfiguration der Ketten interpretiert.Das visko-elastische Verhalten des mit verschiedenen Mengen dieser Phthalate weichgemachten Polyvinylchlorids wurde im Übergangsgebiet beobachtet. Die thermisch-isochronen Veränderungen des Elastizitätsmoduls G(0) wurden in Abhängigkeit von der Struktur interpretiert und auf den Weichmachereffekt der Phthalate als Funktion der Verzweigung der Alkylketten zuriickgefuhrt.
    Notes: A series of phthalates has been synthetised from primary alcohols with variable chain dimension and structure. The structural parameters of phthalates are those of alcohol chain: length of alkyl segment and branching factor i. e. the number, length and position of branches relatively to functional group. The number of carbon atoms in the alcohol skeleton varies from 6 to 13.The physico-chemical properties of phthalates (specific volume, glass transition, viscosity, and sol-gel transition) are interpreted in function of the chain configuration.The visco-elastic behaviour of plasticized PVC is examined for each phthalate in the glass transition range. The creep modulus has been measured by the conventional Clash and Berg method and correlated with structure and molecular weight of the alcohol chain.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1974.050380115
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  • 9
    Electronic Resource
    Electronic Resource
    Copolymerization of tetrahydrofuran with propylene oxide. III. 1,2,3-propanetriol as cocatalyst (1972)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 10 (1972), S. 399-412 
    Details
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The cationic copolymerization of tetrahydrofuran with propylene oxide was investigated with the use of boron trifluoride etherate, 1,2,3-propanetriol, and ethylene chloride as catalyst, cocatalyst, and solvent, respectively. The reactions were carried out in the liquid phase under a blanket of dry nitrogen at atmospheric pressure and in the temperature range from -10° to +20°C. Comonomer consumption was followed by vapor-phase chromatography, while the products were analyzed by gel-permeation chromatography, nuclear magnetic resonance, vapor-pressure osmometry, and chemical endgroup analysis (phthalation). The investigation was directed towards the elucidation of the influence of the initial cocatalyst content, the initial mole fraction of the comonomer, and the temperature of reaction, on the kinetics of the reaction (rates of disappearance of comonomers, reactivity ratios, comonomer conversions and product yields) and on the characteristics of the products formed (composition, molecular weight, and primary and secondary hydroxyl content). An attempt is made to interpret the results reported in the paper.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1972.150100207
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  • 10
    Electronic Resource
    Electronic Resource
    Kinetic aspects of the copolymerization of tetrahydrofuran with alkylene oxides (1971)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 9 (1971), S. 3547-3554 
    Details
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cationic (BF3) copolymerizations and terpolymerizations of 1,2-butylene oxide (BO), propylene oxide (PO), and tetrahydrofuran (THF), have been carried out at 0°C in ethylene dichloride under dry inert conditions. Reactivity ratios of THF-BO, THF-PO and BO-PO systems have been determined with the use successively of 1,2-propanediol and 1,2,3-propanetriol (glycerine) as cocatalysts. Terpolymer compositions established experimentally compare well with those predicted by calculations with the reactivity rations determined in the binary systems. With the triol as cocatalyst, the existence of a ternary azeotrope was confirmed. Its composition is: M1(THF) = 0.125; M2(BO) = 0.205; and M2(PO) = 0.670.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1971.150091212
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