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  • Wiley  (46)
  • Oxford University Press  (13)
  • American Chemical Society (ACS)  (11)
  • PANGAEA
  • Institute of Electrical and Electronics Engineers (IEEE)
  • Springer Science + Business Media
  • 2015-2019  (38)
  • 2010-2014  (37)
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  • 1
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    PANGAEA
    In:  Supplement to: Mangelsdorf, Kai; Zink, Klaus-Gerhard; di Primio, Rolando; Horsfield, Brian (2011): Microbial lipid markers within and adjacent to Challenger Mound in the Belgica carbonate mound province, Porcupine Basin, offshore Ireland (IODP Expedition 307). Marine Geology, 282(1-2), 91-101, https://doi.org/10.1016/j.margeo.2010.05.007
    Publication Date: 2023-06-27
    Description: During the Integrated Ocean Drilling Program (IODP) Expedition 307 for the first time a cold-water coral carbonate mound was drilled down through its base into the underlying sediments. In the current study, sample material from within and below Challenger Mound, located in the Belgica carbonate mound province in the Porcupine Basin offshore Ireland, was investigated for its distribution of microbial communities and gas composition using biogeochemical and geochemical approaches to elucidate the question on the initiation of carbonate mounds. Past and living microbial populations are lower in the mound section compared to the underlying sediments or sediments of an upslope reference site. A reason for this might be a reduced substrate feedstock, reflected by low total organic carbon (TOC) contents, in the once coral dominated mound sequence. In contrast, in the reference site a lithostratigraphic sequence with comparatively high TOC contents shows higher abundances of both past and present microbial communities, indicating favourable living conditions from time of sedimentation until today. Composition and isotopic values of gases below the mound base seem to point to a mixed gas of biogenic and thermogenic origin with a higher proportion of biogenic gas. Oil-derived hydrocarbons were not detected at the mound site. This suggests that at least in the investigated part of the mound base the upward flow of fossil hydrocarbons, being one hypothesis for the initiation of the formation of carbonate mounds, seems to be only of minor significance.
    Keywords: 307-U1317A; 307-U1317D; 307-U1318A; 307-U1318B; DRILL; Drilling/drill rig; Exp307; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Porcupine Basin Carbonate Mounds
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 2
    Publication Date: 2023-06-27
    Keywords: 307-U1317A; 307-U1317D; C1/(C2+C3) hydrocarbon ratio; Carbon dioxide; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Ethane; Event label; Exp307; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Isobutane; Isobutane/n-Butane ratio; Joides Resolution; Methane; n-Butane; Porcupine Basin Carbonate Mounds; Propane; Sample code/label; δ13C, methane; δ Deuterium, methane
    Type: Dataset
    Format: text/tab-separated-values, 158 data points
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  • 3
    Publication Date: 2023-06-27
    Keywords: 307-U1318A; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Exp307; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Phosphatidylethanolamine, per unit mass total organic carbon; Phosphatidylethanolamine, per unit sediment dry mass; Phosphatidylglycerol, per unit mass total organic carbon; Phosphatidylglycerol, per unit sediment dry mass; Phospholipids, per unit mass total organic carbon; Phospholipids, per unit sediment dry mass; Porcupine Basin Carbonate Mounds; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 54 data points
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  • 4
    Publication Date: 2023-11-30
    Keywords: 307-U1317A; 307-U1317D; Carbon, organic, total; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Exp307; Hopane, alpha/beta, per unit sediment dry mass; Hopane, alpha/beta, per unit sediment dry mass on a carbonate free base; Hopane, alpha/beta, total organic carbon; Hopane, beta/beta, per unit sediment dry mass; Hopane, beta/beta, per unit sediment dry mass on a carbonate free base; Hopane, beta/beta, total organic carbon; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; n-Alkane C23-35, per unit sediment dry mass; n-Alkane C23-35, per unit sediment dry mass on a carbonate free base; n-Alkane C23-35, total organic carbon; Porcupine Basin Carbonate Mounds; Sample code/label; Total hopanoids, per unit sediment dry mass; Total hopanoids, per unit sediment dry mass on a carbonate free base; Total hopanoids, total organic carbon; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 318 data points
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  • 5
    Publication Date: 2023-11-30
    Keywords: 307-U1318A; 307-U1318B; Carbon, organic, total; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Exp307; Hopane, alpha/beta, per unit sediment dry mass; Hopane, alpha/beta, per unit sediment dry mass on a carbonate free base; Hopane, alpha/beta, total organic carbon; Hopane, beta/beta, per unit sediment dry mass; Hopane, beta/beta, per unit sediment dry mass on a carbonate free base; Hopane, beta/beta, total organic carbon; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Mass spectrometer Finnigan Delta-E; n-Alkane C23-35, per unit sediment dry mass; n-Alkane C23-35, per unit sediment dry mass on a carbonate free base; n-Alkane C23-35, total organic carbon; Porcupine Basin Carbonate Mounds; Sample code/label; Total hopanoids, per unit sediment dry mass; Total hopanoids, per unit sediment dry mass on a carbonate free base; Total hopanoids, total organic carbon; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 180 data points
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  • 6
    Publication Date: 2013-09-18
    Description: Journal of the American Chemical Society DOI: 10.1021/ja407331n
    Print ISSN: 0002-7863
    Electronic ISSN: 1520-5126
    Topics: Chemistry and Pharmacology
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  • 7
    Publication Date: 2015-05-24
    Description: We demonstrate that tidal evolution of the inner planet (‘e’) of the system orbiting the star 55 Cancri could have led to passage through two secular resonances with other planets in the system. The consequence of this evolution is excitation of both the planetary eccentricity and inclination relative to the original orbital plane. The large mass ratio between the innermost planet and the others means that these excitations can be of substantial amplitude and can have dramatic consequences for the system organization. Such evolution can potentially explain the large observed mutual inclination between the innermost and outermost planets in the system, and implies that tidal heating could have substantially modified the structure of planet e, and possibly reduced its mass by Roche lobe overflow. Similar inner secular resonances may be found in many multiple planet systems and suggest that many of the innermost planets in these systems could have suffered similar evolutions.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
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  • 8
    Publication Date: 2013-02-07
    Description: Accounts of Chemical Research DOI: 10.1021/ar3000986
    Print ISSN: 0001-4842
    Electronic ISSN: 1520-4898
    Topics: Chemistry and Pharmacology
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  • 9
    Publication Date: 2012-04-15
    Description: The optical and resonance Raman spectra of the 2,2′: 6′,2″:6″,6-trioxytriphenyl-amine cation are measured and interpreted. This molecule contains two simultaneous types of coupling between three chromophores and two types of bridging atoms. The first and conventional coupling involves a single nitrogen bridge that couples all three aryl groups. The second is provided by the three oxygen atoms, each of which bridges two adjacent aryl groups. There are two bands in the visible region of the optical absorption spectrum; their assignment and the interpretation of the contributing orbitals and electronic states are described in terms of the neighboring orbital model that explains the effects of the two types of coupling. The bonding changes that take place in the excited electronic states are probed by resonance Raman spectroscopy intensities and analyzed using the time-dependent theory of resonance Raman spectroscopy. The optical absorption spectrum was fit using the measured vibrational frequencies and excited state distortions. The distortions correlate well with the bonding changes predicted by the neighboring orbital model. The resonance Raman data and neighboring orbital model analysis reveal that the two optical absorption bands correspond to charge transfers from aryl groups with different nodal structures in their pi orbitals. Copyright © 2012 John Wiley & Sons, Ltd. The three-chromophore cation (left) has a symmetric charge distribution in its ground state and three equivalent charge-bearing units in its lowest excited state. Coupling between the three units occurs through the central nitrogen and pair-wise through the oxygen. The effects of the coupling on the electronic and resonance Raman spectra are interpreted using the neighboring orbital model.
    Print ISSN: 0894-3230
    Electronic ISSN: 1099-1395
    Topics: Chemistry and Pharmacology , Physics
    Published by Wiley
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  • 10
    Publication Date: 2012-04-16
    Description: The nuclear positioning of mammalian genes often correlates with their functional state. For instance, the human cystic fibrosis transmembrane conductance regulator (CFTR) gene associates with the nuclear periphery in its inactive state, but occupies interior positions when active. It is not understood how nuclear gene positioning is determined. Here, we investigated trichostatin A (TSA)-induced repositioning of CFTR in order to address molecular mechanisms controlling gene positioning. Treatment with the histone deacetylase (HDAC) inhibitor TSA induced increased histone acetylation and CFTR repositioning towards the interior within 20 minutes. When CFTR localized in the nuclear interior (either after TSA treatment or when the gene was active) consistent histone H3 hyperacetylation was observed at a CTCF site close to the CFTR promoter. Knockdown experiments revealed that CTCF was essential for perinuclear CFTR positioning and both, CTCF knockdown as well as TSA treatment had similar and CFTR-specific effects on radial positioning. Furthermore, knockdown experiments revealed that also A-type lamins were required for the perinuclear positioning of CFTR. Together, the results showed that CTCF, A-type lamins and an active HDAC were essential for perinuclear positioning of CFTR and these components acted on a CTCF site adjacent to the CFTR promoter. The results are consistent with the idea that CTCF bound close to the CFTR promoter, A-type lamins and an active HDAC form a complex at the nuclear periphery, which becomes disrupted upon inhibition of the HDAC, leading to the observed release of CFTR. J. Cell. Biochem. © 2012 Wiley Periodicals, Inc.
    Electronic ISSN: 0091-7419
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Published by Wiley
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