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  • 2020-2024  (15)
  • 2010-2014  (6)
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  • 1
    Keywords: Forschungsbericht ; Biosensor ; Bedside-Methode ; Mikrofluidik ; Mikroelektronik ; Sensortechnik ; Infektion ; Graphen ; Biomarker ; Schnelltest ; Blut ; Impedanzmessung
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (41 Seiten, 2,40 MB) , Illustrationen, Diagramme
    Language: German , English
    Note: Förderkennzeichen BMBF 16ES0792K , Verbundnummer 01182217 , Paralleltitel dem englischen Berichtsblatt entnommen , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Sprachen der Zusammenfassungen: Deutsch, Englisch
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  • 2
    Keywords: Hochschulschrift ; Forschungsbericht ; Gewitter ; Radarmeteorologie ; Gewitter ; Radarmeteorologie
    Type of Medium: Book
    Pages: V, 128 S. , Ill., graph. Darst.
    Edition: Als Ms. gedr.
    Series Statement: Forschungsbericht / Deutsches Zentrum für Luft- und Raumfahrt 2010,31
    DDC: 681.2
    RVK:
    Language: English
    Note: Mit dt. u. engl. Zsfassung , Zugl.: München, Univ., Diss., 2010
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  • 3
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    PANGAEA
    In:  Supplement to: Contreras-Rosales, Lorena Astrid; Jennerjahn, Tim C; Tharammal, Thejna; Meyer, Vera D; Lückge, Andreas; Paul, André; Schefuß, Enno (2014): Evolution of the Indian Summer Monsoon and terrestrial vegetation in the Bengal region during the past 18 ka. Quaternary Science Reviews, 102, 133-148, https://doi.org/10.1016/j.quascirev.2014.08.010
    Publication Date: 2023-03-03
    Description: The Indian Summer Monsoon (ISM) is a major global climatic phenomenon. Long-term precipitation proxy records of the ISM, however, are often fragmented and discontinuous, impeding an estimation of the magnitude of precipitation variability from the Last Glacial to the present. To improve our understanding of past ISM variability, we provide a continuous reconstructed record of precipitation and continental vegetation changes from the lower Ganges-Brahmaputra-Meghna catchment and the Indo-Burman ranges over the last 18,000 years (18 ka). The records derive from a marine sediment core from the northern Bay of Bengal (NBoB), and are complemented by numerical model results of spatial moisture transport and precipitation distribution over the Bengal region. The isotopic composition of terrestrial plant waxes (dD and d13C of n-alkanes) are compared to results from an isotope-enabled general atmospheric circulation model (IsoCAM) for selected time slices (pre-industrial, mid-Holocene and Heinrich Stadial 1). Comparison of proxy and model results indicate that past changes in the dD of precipitation and plant waxes were mainly driven by the amount effect, and strongly influenced by ISM rainfall. Maximum precipitation is detected for the Early Holocene Climatic Optimum (EHCO; 10.5-6 ka BP), whereas minimum precipitation occurred during the Heinrich Stadial 1 (HS1; 16.9-15.4 ka BP). The IsoCAM model results support the hypothesis of a constant moisture source (i.e. the NBoB) throughout the study period. Relative to the pre-industrial period the model reconstructions show 20% more rain during the mid-Holocene (6 ka BP) and 20% less rain during the Heinrich Stadial 1 (HS1), respectively. A shift from C4-plant dominated ecosystems during the glacial to subsequent C3/C4-mixed ones during the interglacial took place. Vegetation changes were predominantly driven by precipitation variability, as evidenced by the significant correlation between the dD and d13C alkane records. When compared to other records across the ISM domain, precipitation and vegetation changes inferred from our records and the numerical model results provide evidence for a coherent regional variability of the ISM from the Last Glacial to the present.
    Keywords: Center for Marine Environmental Sciences; Leibniz Centre for Tropical Marine Research; MARUM; ZMT
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 4
    Publication Date: 2023-04-22
    Description: Compound-specific radiocarbon dating often requires working with small samples of 〈 100 µg carbon (µgC). This makes the radiocarbon dates of biomarker compounds very sensitive to biases caused by extraneous carbon of unknown composition, a procedural blank, which is introduced to the samples during the steps necessary to prepare a sample for radiocarbon analysis by accelerator mass spectrometry (i.e., isolating single compounds from a heterogeneous mixture, combustion, gas purification and graphitization). Reporting accurate radiocarbon dates thus requires a correction for the procedural blank. We present our approach to assess the fraction modern carbon (F14C) and the mass of the procedural blanks introduced during the preparation procedures of lipid biomarkers (i.e. n-alkanoic acids) and lignin phenols. We isolated differently sized aliquots (6-151 µgC) of n-alkanoic acids and lignin phenols obtained from standard materials with known F14C values. Each compound class was extracted from two standard materials (one fossil, one modern) and purified using the same procedures as for natural samples of unknown F14C. There was an inverse linear relationship between the measured F14C values of the processed aliquots and their mass, which suggests constant contamination during processing of individual samples. We used Bayesian methods to fit linear regression lines between F14C and 1/mass for the fossil and modern standards. The intersection points of these lines were used to infer F14Cblank and mblank and their associated uncertainties. We estimated 4.88±0.69 μgC of procedural blank with F14C of 0.714±0.077 for n-alkanoic acids, and 0.90±0.23 μgC of procedural blank with F14C of 0.813±0.155 for lignin phenols. These F14Cblank and mblank can be used to correct AMS results of lipid and lignin samples by isotopic mass balance. This method may serve as a standardized procedure for blank assessment in small-scale radiocarbon analysis.
    Keywords: AWI_Envi; Center for Marine Environmental Sciences; MARUM; Polar Terrestrial Environmental Systems @ AWI
    Type: Dataset
    Format: application/zip, 2.5 MBytes
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  • 5
    Publication Date: 2023-04-22
    Keywords: AWI_Envi; Compounds; Event label; Fraction modern carbon; Fraction modern carbon, standard deviation; Laboratory code/label; Mass; Mass, standard deviation; Messel_oil_shale; Messel, Germany; OUTCROP; Outcrop sample; Polar Terrestrial Environmental Systems @ AWI; Type
    Type: Dataset
    Format: text/tab-separated-values, 205 data points
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  • 6
    Publication Date: 2023-06-27
    Description: The dataset comprises contents and mass-accumulation rates of lignin phenols in sediment cores from the Bering Sea (cores SO202/1_18-3 and SO202/1_18-6). Eight lignin-derived phenols were analyzed in our study. They can be classified into three groups according to their plant sources and structures: Vanillyl phenols (V) consisting of vanillin (Vl), acetovanillone (Vn) and vanillic acid (Vd). 2. Syringyl phenols (S), comprising syringealdehyde (Sl), acetosyringone (Sn) and syringic acid (Sd). 3. Cinnamyl phenols (C) that include p-coumaric acid (p-Cd) and ferulic acid (Fd). Besides, we also included some other oxidation products that do not necessarily originate from lignin, such as 3,5-dihydroxybenzoic acid (3,5Bd). Contents are calculated relative to total organic carbon contents and to the dry weight of the sediment. Indicators for vegetation development (S/V and C/V), wetland extent (3,5Bd/V) and degree of organic matter degradation ((Ad/Al)s and (Ad/Al)v) are given. Moreover, TOC and dry bulk density of the two sediment cores are also shown in this dataset.
    Keywords: 3,5-dihydroxybenzoic acid/vanillyl phenols ratio; 3,5-dihydroxybenzoic acid per unit mass organic carbon; 3,5-dihydroxybenzoic acid per unit sediment mass; Accumulation rate, lignin per year; Accumulation rate per year; Acetosyringone per unit mass organic carbon; Acetosyringone per unit sediment mass; Acetovanillone per unit mass organic carbon; Acetovanillone per unit sediment mass; AGE; Amur Basin; Bering Sea; Carbon, organic, total; Cinnamyl phenols/vanillyl phenols ratio; Cinnamyl phenols per unit mass organic carbon; Deglaciation; Density, dry bulk; DEPTH, sediment/rock; Event label; Ferulic acid per unit mass organic carbon; Ferulic acid per unit sediment mass; INOPEX; KAL; Kasten corer; KL; Latitude of event; Lignin per unit sediment mass; lignin phenols; Lignin phenols per unit mass organic carbon; Longitude of event; p-Coumaric acid per unit mass organic carbon; p-Coumaric acid per unit sediment mass; Piston corer (BGR type); Sample ID; Sample mass; Sea surface temperature; Sedimentation rate; SO202/1; SO202/1_18-3; SO202/1_18-6; Sonne; Syringaldehyde per unit mass organic carbon; Syringaldehyde per unit sediment mass; Syringic acid/syringaldehyde ratio; Syringic acid per unit mass organic carbon; Syringic acid per unit sediment mass; Syringyl phenols/vanillyl phenols ratio; Syringyl phenols per unit mass organic carbon; Terrestrial Organic Matter; Vanillic acid/vanillin ratio; Vanillic acid per unit mass organic carbon; Vanillic acid per unit sediment mass; Vanillin per unit mass organic carbon; Vanillin per unit sediment mass; Vanillyl phenols per unit mass organic carbon; Vegetation change; Yukon Basin
    Type: Dataset
    Format: text/tab-separated-values, 1712 data points
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  • 7
    Publication Date: 2023-06-27
    Description: The dataset comprises contents and mass-accumulation rates of lignin phenols in sediment core from the Okhotsk Sea (core SO178-13-6). Eight lignin-derived phenols were analyzed in our study. They can be classified into three groups according to their plant sources and structures: Vanillyl phenols (V) consisting of vanillin (Vl), acetovanillone (Vn) and vanillic acid (Vd). 2. Syringyl phenols (S), comprising syringealdehyde (Sl), acetosyringone (Sn) and syringic acid (Sd). 3. Cinnamyl phenols (C) that include p-coumaric acid (p-Cd) and ferulic acid (Fd). Besides, we also included some other oxidation products that do not necessarily originate from lignin, such as 3,5-dihydroxybenzoic acid (3,5Bd). Contents are calculated relative to total organic carbon contents and to the dry weight of the sediment. Moreover, indicators for vegetation development (S/V and C/V), wetland extent (3,5Bd/V) and degree of organic matter degradation ((Ad/Al)s and (Ad/Al)v) are given.
    Keywords: 3,5-dihydroxybenzoic acid/vanillyl phenols ratio; 3,5-dihydroxybenzoic acid per unit mass organic carbon; 3,5-dihydroxybenzoic acid per unit sediment mass; Accumulation rate, lignin per year; Accumulation rate per year; Acetosyringone per unit mass organic carbon; Acetosyringone per unit sediment mass; Acetovanillone per unit mass organic carbon; Acetovanillone per unit sediment mass; AGE; Amur Basin; Carbon, organic, total; Cinnamyl phenols/vanillyl phenols ratio; Cinnamyl phenols per unit mass organic carbon; Deglaciation; DEPTH, sediment/rock; Ferulic acid per unit mass organic carbon; Ferulic acid per unit sediment mass; KOL; KOMEX; Latitude of event; Lignin per unit sediment mass; lignin phenols; Lignin phenols per unit mass organic carbon; Longitude of event; p-Coumaric acid per unit mass organic carbon; p-Coumaric acid per unit sediment mass; Piston corer (Kiel type); Sakhalin shelf and slope; Sample ID; Sample mass; Sea surface temperature; SO178; SO178-13-6; Sonne; Syringaldehyde per unit mass organic carbon; Syringaldehyde per unit sediment mass; Syringic acid/syringaldehyde ratio; Syringic acid per unit mass organic carbon; Syringic acid per unit sediment mass; Syringyl phenols/vanillyl phenols ratio; Syringyl phenols per unit mass organic carbon; Terrestrial Organic Matter; Vanillic acid/vanillin ratio; Vanillic acid per unit mass organic carbon; Vanillic acid per unit sediment mass; Vanillin per unit mass organic carbon; Vanillin per unit sediment mass; Vanillyl phenols per unit mass organic carbon; Vegetation change; Yukon Basin
    Type: Dataset
    Format: text/tab-separated-values, 1683 data points
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  • 8
    Publication Date: 2023-05-02
    Description: The dataset comprises contents and mass-accumulation rates of lignin in sediment cores from the Bering Sea (core SO202-18-3/6) and the Okhotsk Sea (cores SO178-13-6). These data have been obtained on these two cores: SO202-18-3/6 for the dry bulk density, sedimentation rate, and sea surface temperatures; lignin phenols concentrations are available for both cores. Moreover, contents of 3,5-dihydroxybenzoic acid are given. Contents are calculated relative to total organic carbon contents and to the dry weight of the sediment.
    Keywords: Amur Basin; Deglaciation; lignin phenols; Sea surface temperature; Terrestrial Organic Matter; Vegetation change; Yukon Basin
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 9
    Publication Date: 2023-06-27
    Keywords: Age, 14C; Age, 14C calibrated, CALIB 5.0.2 (Stuiver et al., 2005); Age, dated; Age, dated, range, maximum; Age, dated, range, minimum; Age, dated standard deviation; Bay of Bengal; Bengal Sea Level; Center for Marine Environmental Sciences; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; KL; Laboratory code/label; Leibniz Centre for Tropical Marine Research; MARUM; Piston corer (BGR type); SO188/2; SO188/2_342; Sonne; ZMT
    Type: Dataset
    Format: text/tab-separated-values, 72 data points
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  • 10
    Publication Date: 2024-03-18
    Keywords: 77; African Humid Period; Age, calculated calendar years; Age, maximum/old; Age, mean; Age, median; Age, minimum/young; Carbon isotopes; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Eastern Mediterranean, Continental slope off Israel; GeoB7702-3; Gravity corer (Kiel type); hydroclimate; Hydrogen isotopes; leaf-wax biomarkers; M52/2; MARUM; Meteor (1986); Nile River; SL; Westerlies
    Type: Dataset
    Format: text/tab-separated-values, 2328 data points
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