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  • 1
    Electronic Resource
    Electronic Resource
    Exact mass determinations under FAB conditions
    Amsterdam : Elsevier
    International Journal of Mass Spectrometry and Ion Physics 46 (1983), S. 371-374 
    Details
    ISSN: 0020-7381
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0020-7381(83)80129-6
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fast atom bombardment for peptide sequencing - a comparison with conventional ionization techniques
    Amsterdam : Elsevier
    International Journal of Mass Spectrometry and Ion Physics 46 (1983), S. 403-406 
    Details
    ISSN: 0020-7381
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0020-7381(83)80137-5
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Investigation of an LC/MS interface for EI-, CI- and FAB-ionization
    Amsterdam : Elsevier
    International Journal of Mass Spectrometry and Ion Physics 46 (1983), S. 185-188 
    Details
    ISSN: 0020-7381
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0020-7381(83)80084-9
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Combination and positional distribution of fatty acids in lipids from blue-green algae (1978)
    Springer
    Archives of microbiology 119 (1978), S. 157-162 
    Details
    ISSN: 1432-072X
    Keywords: Galactolipids ; Sulfolipids ; Phosphatidylglycerol ; Mass spectrometry ; Diglyceride species ; Chain length pairing ; Microcystis ; Anabaena ; Nostoc ; Oscillatoria ; Tolypothrix
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The main glycerolipids (monogalactosyl-, digalactosyl-, sulphoquinovosyl diacylglycerol, phosphatidylglycerol) from five blue-green algae (Microcystis, Anabaena, Nostoc, Oscillatoria, Tolypothrix) were analyzed for fatty acid composition, occurrence of diglyceride species and positional distribution of fatty acids between thesn-1- andsn-2-position of glycerol. In contrast to eucaryotic plants biosynthetically closely related lipids (monogalactosyl-, digalactosyl-, trigalactosyl diacylglycerol) show nearly identical diglyceride moieties, whereas sulphoquinovosyl diacylglycerol and phosphatidylglycerol are separated from galactolipids by composition as well as occurrence of fatty acids. On the other hand the positional distribution of fatty acids in all lipids is controlled exclusively by chain length and not by degree of unsaturation with C18-fatty acids at thesn-1- and C16-fatty acids at thesn-2-position. These results show that in procaryotic organisms the diversity in diglyceride portions of lipids is reduced as compared to eucaryotic organisms, but nevertheless does exist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00964267
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Massenspektroskopische Fragmentierungsreaktionen: VI Für V. Mitteilung, siehe Lit. 1.-Produktstabilität oder ‘lokalisierte Ladung’ als Konzept zur Deutung der Bruchstückbildung? (1974)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 9 (1974), S. 861-877 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: By using alkyl amines ω-substituted with a second functional group (O, S, Se) it is shown that charge migration after ionisation below the ionisation potential of primary amines towards the N atom (which finally results in the formation of [CH2=NH2]+) does not occur via the σ-bonds, but by special interactions of the functional groups. In addition, the fragmentation behaviour of simple methyl alkyl selenides is described.
    Notes: An Hand von Alkylaminen, die ω-ständig eine zweite funktionelle Gruppe (O, S, Se) tragen, wird gezeigt, daß bei Ionisierung unterhalb des Ionisierungspotentials primärer Amine Ladungswanderung zum N, die schließlich zur Bildung von CH2=NH2+ führt, nicht generell über die σ-Bindungen, sondern über spezielle Mechanismen erfolgen kann. Zusätzlich wird das Fragmentierungsverhalten einfacher Methyl-alkyl-selenide beschrieben.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210090906
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  • 6
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    MarGIS: Characterisation of provinces at the seafloor of the North Sea by GIS and geostatistical techniques (2005)
    In:  EPIC3Internationale GV-DGG-Tagung: Das System Erde. Universität Erlangen. 24.-29. September 2005.
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 7
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    MarGIS Marine Geo-Information System for Visualisation and Typology of Marine Geodata. (2005)
    In:  EPIC3Conference Proceedings EnviroInfo 2005, pp. 165-174
    Details
    Publication Date: 2019-07-17
    Description: MarGIS intends the combination of Geographical Information Systems (GIS), research data, and multivariate geostatistical techniques for characterisation and identification of distinct provinces at the seafloor of the North Sea. Such a typological approach, the analysis of classification based on types, is one prerequisite for management issues related to coastalseafloor. It provides a framework for improved application of large environmental data sets, allows enhanced visualisation of multiple information layers, and supports modeling of temporal and spatial interrelations of coastal and ocean regions. To tackle the problem of presentation of large data sets MarGIS uses a web-based viewer which allows a clear visualisation of the information for the general public. The viewer allows a dynamic actualisation and access to metadata and additional information.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 8
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    Spatial analysis of marine categorical information using indicator kriging applied to georeferenced video mosaics of the deep-sea Håkon Mosby Mud Volcano. (2006)
    In:  EPIC3Ecological Informatics, 1(4), pp. 391-406, ISSN: 1574-9541
    Details
    Publication Date: 2019-07-17
    Description: The exact area calculation of irregularly distributed data is in the focus of all territorial geochemical balancing methods or definition of protection zones. Especially in the deep sea environment the interpolation of measurements into surfaces represents an important gain of information, because of cost- and time-intensive data acquisition.The geostatistical interpolation method indicator kriging therefore is applied for an accurate mapping of the spatial distribution of benthic communities following a categorical classification scheme at the deep-sea submarine Håkon Mosby Mud Volcano. Georeferenced video mosaics were obtained during several dives by the Remotely Operated Vehicle Victor6000 in a water depth of 1260 m. Mud volcanoes are considered as significant source locations for methane indicated by unique chemoautotrophic communities as Beggiatoa mats and pogonophoran tube worms. For the detection and quantification of their spatial distribution 2840 georeferencedvideo mosaics were analysed by visual inspection. Polygons, digitised on the georeferenced images within a GIS, build the data basis for geostatistically interpolated mono-parametric surface maps. Indicator kriging is applied to the centroids of the polygons calculating surfacemaps.The quality assessment of the surface maps is conducted by leave-one-out cross-validation evaluating the fit of the indicator kriging variograms by using statistical mean values. Furthermore, the estimate was evaluated by a validation dataset of the visual inspection of 530 video mosaics not included within the interpolation, thus, proving the interpolated surfaces independently. With regard to both validating mechanisms, we attained satisfying results and we provided each category applied for the identification of biogeochemical habitats with apercentage probability value of occurrence.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 9
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    Using decision trees to predict benthic communities within and near the German Exclusive Economic Zone (EEZ) of the North Sea (2008)
    In:  EPIC3Environmental Monitoring and Assessment, 136(1-3)325, 313, ISBN: 0167-6369 (Print) 15
    Details
    Publication Date: 2016-07-08
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 10
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    GIS-BASED SUITABILITY MODELLING FOR THE EUROPEAN OYSTER WITHIN THE GERMAN EXCLUSIVE ZONE OF THE NORTH SEA (2022)
    In:  EPIC3gis.Science - Die Zeitschrift fur Geoinformatik, 2022(2), pp. 47-62, ISSN: 1869-9391
    Details
    Publication Date: 2023-06-21
    Description: Oyster reefs are ecologically important habitats that have been suffering from anthropogenic stressors and severe damages over the past century. More than 85 % of the world's oyster reefs have already been destroyed, have disappeared or their existence is under severe and immediate threat. Due to their central ecological importance for benthic and bentho-pelagic systems and processes associated with important ecosystem functions and services, the restoration of oyster reefs is a focus of marine conservation measures worldwide. In the context of marine spatial planning and complex land use conflicts, and aimed at maximising the ecological success of such restoration measures, GIS-based habitat suitability analyses for oyster reintroduction have been conducted. The aim of the present study was to model and identify suitable habitats for the European oyster within the marine protected areas of Borkum Reefground and Sylt Outer Reef in the German Bight for which the restoration of biogenic reefs, namely native oyster reefs is a designated measure. For this purpose, a multi-criteria decision analysis was designed and applied. Based on geodata of the ecological habitat preferences of the European oyster and relevant logistic factors (contraindicated uses), suitable large- scale areas were successfully identified for which a reintroduction of the formerly native species is favourable. Both suitable and unsuitable habitats could therefore successfully be identified for both nature reserves. Due to the large impact of different standardisation procedures for the suitability variables applied, corresponding results may differ quite severely. Hence four different classifications were applied on the most important factor, ground fisheries accounting for a relative weighting of ca. 30% in the derived suitability formula. The results undermine the necessity of well-grounded scientific and practical reasons to decide on a suitable classification procedure in the multicriteria analysis.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , NonPeerReviewed
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