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  • 2020-2024  (30)
  • 2000-2004  (206)
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  • 11
    Electronic Resource
    Electronic Resource
    Raman-Rayleigh-LIF measurements of temperature and species concentrations in the Delft piloted turbulent jet diffusion flame (2000)
    Springer
    Applied physics 71 (2000), S. 95-111 
    Details
    ISSN: 1432-0649
    Keywords: PACS: 42.62.Fi; 82.40.Py
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We report a series of Raman-Rayleigh-LIF measurements in two turbulent natural-gas jet diffusion flames produced by the Delft piloted jet diffusion flame burner. The main objective of the Raman-Rayleigh-LIF measurements was to obtain detailed information on the major species concentrations in the flames. The measurements provide simultaneous data on temperature, the concentrations of the major species and the radicals OH and NO and mixture fraction. The application of the Raman technique in the undiluted natural-gas flames proves to be very challenging because of the high fluorescence interference levels. The interference contributions to the recorded Raman signals are identified and subtracted using empirical correlations between the Raman signals and the signals on fluorescence interference monitor channels. The calibration and data reduction of the Raman-Rayleigh and LIF signals are discussed in detail. The resulting dataset compares excellently with data from previous experiments. Because the Raman-Rayleigh-LIF data provide quantitative concentrations and accordingly quantitative mixture fractions, they form a valuable and useful extension of the existing database for the Delft piloted jet diffusion flame burner.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003400000278
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    Paper (German National Licenses)
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  • 12
    Electronic Resource
    Electronic Resource
    Fluorescence Quenching of Auramine in Fluid Solutions: A Femtosecond Spectroscopy Study (2000)
    Springer
    Journal of fluorescence 10 (2000), S. 155-155 
    Details
    ISSN: 1573-4994
    Keywords: Fluorescent probe ; ultrafast spectroscopy ; barrierless twisting ; charge shift
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The quenching of Auramine fluorescence in ethanol is studied by two ultrafast spectroscopy techniques. The gain band, probed by transient absorption spectroscopy, vanishes in a few picoseconds, while a transient absorption band rises and the ground-state repopulation is delayed. In up-conversion experiments, nonexponential wavelength-dependent fluorescence decays are observed. The average decay times increase with the wavelength and the reconstructed instantaneous spectrum exhibits a few hundred-wavenumber red shift and a broadening while its intensity drops. The previously proposed relaxation model, involving a barrierless internal twisting motion toward a transient dark state, is further examined. In particular, the extinction coefficients of the transient state are extracted from the differential absorption spectra. The band is found to lie in the same wavelength range as the dimethylaniline cation radical. This result is discussed as a possible support for an internal twisting process involving a charge shift.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009495109948
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  • 13
    Electronic Resource
    Electronic Resource
    Progress in Nature and Culture (2000)
    Springer
    Biology and philosophy 15 (2000), S. 759-772 
    Details
    ISSN: 1572-8404
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Philosophy
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006686012795
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  • 14
    Electronic Resource
    Electronic Resource
    The Engagement of Religion and Biology: A Case Study in the Mediating Role of Metaphor in the Sociobiology of Lumsden & Wilson (2000)
    Springer
    Biology and philosophy 15 (2000), S. 669-698 
    Details
    ISSN: 1572-8404
    Keywords: analogy ; biological systems ; causation ; complexity ; emergent materialism ; hierarchy ; human sociobiology ; information ; metaphor ; methodological reduction ; ontological reduction ; part-whole relations ; physical systems ; religion and science ; self-organization ; social systems ; theory constitution ; theory reduction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Philosophy
    Notes: Abstract I claim that explanations of human behaviour by Edward O. Wilsonand Charles Lumsden are constituted by a religiously functioningmetaphysics: emergent materialism. The constitutive effects areidentified using six criteria, beginning with a metaphorical re-description of dissimilarities between levels of organization interms of the lower level, and consist of conceptual andexplanatory reductions (CER). Wilson and Lumsden practice CER,even though CER is not required by emergent materialism. Theypreconceive this practice by a re-description which conflates thelevels of organization and explain failure of CER in terms oftechnical, not ontological or epistemological reasons. Iinterpret these three practices as a reaction of Wilson againsthis early Christian religious beliefs. Statements by Wilsonindicate this reaction ultimately constitutes his explanations ofsocial, moral and religious behaviour. Tested knowledge about matter at the lower level functions as ametaphysical belief when applied to the higher level becausethere it is untested. I offer twelve criteria for the diagnosisof religious functions of this metaphysical materialism, five ofwhich are satisfied. I show that the constitutive effects of thismaterialism in sociobiology are due to its religious functions,are beneficial for science and do not destroy its public nature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006688908463
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  • 15
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    Molecular biomarkers, UK'37-derived sea surface temperature, δ²H of C37-alkenones and δ¹⁸O-seawater of Globigerinoides ruber from ODP Site 202-1240 (2020)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Description: Down core marine sediment samples from ODP Site 1240 have been used for the analysis of the C28 and C30 1,14-diols, the C37:2 and C37:3 long chain ketones (alkenones) and the 24-methylcholesta-5,22-dien-3β-ol (brassicasterol) as proxies of primary productivity. Alkenones were also used to infer past sea surface temperatures through the unsaturation index UK'37. The C29 n-alkane was measured to obtain information on continental material inputs. δD of C37-alkenones and δ¹⁸O-seawater of Globigerinoides ruber were used as indicators of relative salinity changes. This data has been used for the study of the period between 150 and 110 ka (sediment depth from ca. 13 to 17 m), according to the age model from Rippert et al. (2017).
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 16
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    δ13C values of long-chain diols in 13C bicarbonate incubation experiments with Lake Geneva water (2021)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Keywords: BUCKET; Bucket water sampling; DATE/TIME; DEPTH, water; Long chain diol, C28 1,13-diol, δ13C; Long chain diol, C28 1,13-diol, δ13C, standard deviation; Long chain diol, C30 1,13-diol, δ13C; Long chain diol, C30 1,13-diol, δ13C, standard deviation; Long chain diol, C30 1,15-diol, δ13C; Long chain diol, C30 1,15-diol, δ13C, standard deviation; Long chain diol, C32 1,15-diol, standard deviation; Long chain diol, C32 1,15-diol, δ13C; SHL 2; SHL-2
    Type: Dataset
    Format: text/tab-separated-values, 76 data points
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  • 17
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    Concentration of the long-chain diols in Lake Geneva during the period of October 2017 and June 2018 (2021)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Keywords: BUCKET; Bucket water sampling; DATE/TIME; DEPTH, water; Long chain diol, C28 1,13-diol; Long chain diol, C28 1,14-diol; Long chain diol, C30 1,13-diol; Long chain diol, C30 1,14-diol; Long chain diol, C30 1,15-diol; Long chain diol, C30 1,16-diol; Long chain diol, C32:1 1,15-diol; Long chain diol, C32 1,15-diol; SHL 2; SHL-2; Sum long chain diols
    Type: Dataset
    Format: text/tab-separated-values, 42 data points
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  • 18
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    Diol concentration and stable isotopes incubation experiment in Lake Geneva (2021)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Description: Long-chain diols (LCDs) have been measured on suspended particulate matter from the surface of Lake Geneva (France/Switzerland) during a year (August 2017 to June 2018). LCD have been extracted from the filter (~20L of water) by acid and base hydrolysis followed by an aluminum oxide column (eluted with dichloromethane:methanol, 1:1, v/v). They have been quantified on a GC-MS (gas chromatograph mass spectrometer) on single ion monitoring mode. In addition, 40L of water have been incubated with 13C-labeled bicarbonate and the LCD have been extracted as above plus their 13C-ratio has been determined after silylation using a gas chromatograph isotope ratio mass spectrometer.
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 19
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    Lithology description, textural and structural observations, and indications for ground ice of sediment core CRP-2 (Table 1-4) (2000)
    PANGAEA
    In:  Supplement to: van der Meer, Jaap (2000): Microscopic observations on the frist 300 metres of CRP-2/2A, Victoria Land Basin, Antarctica. Terra Antartica, 7(3), 339-348, hdl:10013/epic.28271.d001
    Details
    Publication Date: 2023-07-14
    Description: From the upper 300 m of CRP-2/2A, twenty-six samples of diamicts and deformation structures have been thin sectioned. These have been analysed for texture, structure, diagenesis and plasmic fabric. The combination of certain microstructures (e.g. turbate and linear) and plasmic fabric development is indicative of grounded ice. Clear evidence for two grounded ice events (three samples) was found in the upper Oligocene part of the core. The interpretation of ten more samples is less certain, but as for CRP-1, is taken to point to grounded ice as well. There is a strong correlation between these indications for grounded ice and the basal part of cycles in the sequence stratigraphy.
    Keywords: 14.2 km at 096° true from Cape Roberts; Cape Roberts Project; Clast shape; Core wireline system; CRP; CRP-2; CRP-2A; CWS; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Diagenesis; Distribution; Event label; Fabric; Interpretation; Lithologic unit/sequence; Lithology/composition/facies; off Cape Roberts, Ross Sea, Antarctica; Sample code/label; Sampling/drilling from ice; Sequence identifier; Size; Structure
    Type: Dataset
    Format: text/tab-separated-values, 581 data points
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  • 20
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    Concentrations of monoanhydrous sugars (firemarkers) in Hala Hu sediment core H11 (2021)
    PANGAEA
    Details
    Publication Date: 2023-10-18
    Description: Concentrations of monoanhydrous sugars (firemarkers) were analysed in core H11 from Hala Hu, China. The lake is located on the northern margin of the Tibetan Plateau (97.24 - 97.47°E, 38.12 - 38.25°N, 4,078 m above sea level), along the modern marginal zone between the Asian Summer Monsoon (ASM) and westerlies influences. The core was drilled at the deepest point (65 m) of the lake and extends from 0 to 212 cm sediment depth. According to the age-model (Yan et al., 2020) the covered time period is modern - 9216 cal yr BP. Compounds were quantified by means of ion chromatography (IC Dionex ICS 5000, Thermo Scientific, Waltham, USA), coupled with a single quadrupole mass spectrometer (MSQ Plus™, Thermo Scientific), which was equipped with a CarboPac MA1™ column (Thermo Scientific, 2 mm x 250 mm) and an Amino Trap column (2 mm x 50 mm).
    Keywords: Biomarker; Calendar age; Calendar age, maximum/old; Calendar age, minimum/young; China; DEPTH, sediment/rock; Galactosan, error; Galactosan per unit sediment mass; H11; Hala_Hu_2011-H11; Hala Hu; Ion chromatography Mass Spectrometry (IC-MS); Levoglucosan, error; Levoglucosan per unit sediment mass; Mannosan, error; Mannosan per unit sediment mass; Niederreiter Piston corer; NPC; Paleoclimate; Sediment core; Sum monoanhydrous sugars, error; Sum monoanhydrous sugars per unit sediment mass; Tibetan Plateau
    Type: Dataset
    Format: text/tab-separated-values, 1194 data points
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