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  • 1
    Keywords: Gnosticism, History. ; Hermetism, History.
    Pages: x, 402 p.
    ISBN: 0-585-04363-9
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  • 2
    Keywords: computer tomography; X-ray analysis
    Description / Table of Contents: Applications of X-ray computed tomography in the geosciences / F. Mees, R. Swennen, M. Van Geet and P. Jacobs / Geological Society, London, Special Publications, 215, 1-6, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.01 --- Applications of high-resolution X-ray computed tomography in petrology, meteoritics and palaeontology / W. D. Carlson, T. Rowe, R. A. Ketcham and M. W. Colbert / Geological Society, London, Special Publications, 215, 7-22, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.02 --- Computed tomography in petroleum engineering research / S. Akin and A. R. Kovscek / Geological Society, London, Special Publications, 215, 23-38, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.03 --- Study of the microgeometry of porous materials using synchrotron computed microtomography / K. W. Jones, H. Feng, W. B. Lindquist, P. M. Adler, J. F. Thovert, B. Vekemans, L. Vincze, I. Szaloki, R. Van Grieken, F. Adams and C. Riekel / Geological Society, London, Special Publications, 215, 39-49, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.04 --- Porosity measurements of sedimentary rocks by means of microfocus X-ray computed tomography (μCT) / M. Van Geet, D. Lagrou and R. Swennen / Geological Society, London, Special Publications, 215, 51-60, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.05 --- Quantitative characterization of fracture apertures using microfocus computed tomography / K. Vandersteen, B. Busselen, K. Van Den Abeele and J. Carmeliet / Geological Society, London, Special Publications, 215, 61-68, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.06 --- Three-dimensional visualization of fractures in rock test samples, simulating deep level mining excavations, using X-ray computed tomography / E. Sellers, A. Vervoort and J. Van Cleynenbreugel / Geological Society, London, Special Publications, 215, 69-80, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.07 --- Geostatistics and the representative elementary volume of gamma ray tomography attenuation in rock cores / J. R. Vogel and G. O. Brown / Geological Society, London, Special Publications, 215, 81-93, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.08 --- Porosity and fluid flow characterization of granite by capillary wetting using X-ray computed tomography / Y. Géraud, F. Surma and F. Mazerolle / Geological Society, London, Special Publications, 215, 95-105, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.09 --- Direct imaging of fluid flow in fault-related rocks by X-ray CT / T. Hirono, M. Takahashi and S. Nakashima / Geological Society, London, Special Publications, 215, 107-115, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.10 --- Rock drying tests monitored by X-ray computed tomography — the effect of saturation methods on drying behaviour / B. Rousset-Tournier, F. Mazerolle, Y. Géraud and D. Jeannette / Geological Society, London, Special Publications, 215, 117-125, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.11 --- Characterization by X-ray computed tomography of water absorption in a limestone used as building stone in the Oviedo Cathedral (Spain) / V. G. Ruiz de Argandoña, A. Rodriguez-Rey, C. Celorio, L. Calleja and L. M. Suárez del Rio / Geological Society, London, Special Publications, 215, 127-134, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.12 --- Estimation of porosity and hydraulic conductivity from X-ray CT-measured solute breakthrough / S. H. Anderson, H. Wang, R. L. Peyton and C. J. Gantzer / Geological Society, London, Special Publications, 215, 135-149, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.13 --- Assessment of soil structure using X-ray computed tomography / H. Rogasik, I. Onasch, J. Brunotte, D. Jegou and O. Wendroth / Geological Society, London, Special Publications, 215, 151-165, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.14 --- 3D soil image characterization applied to hydraulic properties computation / J. F. Delerue, E. Perrier, A. Timmerman and R. Swennen / Geological Society, London, Special Publications, 215, 167-176, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.15 --- Evaluation of local porosity changes in limestone samples under triaxial stress field by using X-ray computed tomography / C. O. Karacan, A. S. Grader and P. M. Halleck / Geological Society, London, Special Publications, 215, 177-189, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.16 --- Monitoring void ratio redistribution during continuous undrained triaxial compression by X-ray computed tomography / P. R. Thomson and R. C. K. Wong / Geological Society, London, Special Publications, 215, 191-198, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.17 --- The use of X-ray computed tomography in the investigation of the settlement behaviour of compacted mudrock / M. A. O’Neill, A. K. Goodwin and W. F. Anderson / Geological Society, London, Special Publications, 215, 199-204, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.18 --- Industrial X-ray computed tomography studies of lake sediment drill cores / A. Flisch and A. Becker / Geological Society, London, Special Publications, 215, 205-212, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.19 --- Analysis of analogue models by helical X-ray computed tomography / G. Schreurs, R. Hänni, M. Panien and P. Vock / Geological Society, London, Special Publications, 215, 213-223, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.20 --- Preliminary microfocus X-ray computed tomography survey of echinoid fossil microstructure / S. R. Stock and A. Veis / Geological Society, London, Special Publications, 215, 225-235, 1 January 2003, https://doi.org/10.1144/GSL.SP.2003.215.01.21
    Pages: Online-Ressource (243 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 9781862394636
    Language: English
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  • 3
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: 9α-Hydroxylation of 4-androstene-3,17-dione (AD) and 1,4-androstadiene-3,17-dione (ADD) is catalysed by 3-ketosteroid 9α-hydroxylase (KSH), a key enzyme in microbial steroid catabolism. Very limited knowledge is presently available on the KSH enzyme. Here, we report for the first time the identification and molecular characterization of genes encoding KSH activity. The kshA and kshB genes, encoding KSH in Rhodococcus erythropolis strain SQ1, were cloned by functional complementation of mutant strains blocked in AD(D) 9α-hydroxylation. Analysis of the deduced amino acid sequences of kshA and kshB showed that they contain domains typically conserved in class IA terminal oxygenases and class IA oxygenase reductases respectively. By definition, class IA oxygenases are made up of two components, thus classifying the KSH enzyme system in R. erythropolis strain SQ1 as a two-component class IA monooxygenase composed of KshA and KshB. Unmarked in frame gene deletion mutants of parent strain R. erythropolis SQ1, designated strains RG2 (kshA mutant) and RG4 (kshB mutant), were unable to grow on steroid substrates AD(D), whereas growth on 9α-hydroxy-4-androstene-3,17-dione (9OHAD) was not affected. Incubation of these mutant strains with AD resulted in the accumulation of ADD (30–50% conversion), confirming the involvement of KshA and KshB in AD(D) 9α-hydroxylation. Strain RG4 was also impaired in sterol degradation, suggesting a dual role for KshB in both sterol and steroid degradation.
    Type of Medium: Electronic Resource
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  • 4
    Publication Date: 2016-03-08
    Description: We study the star formation properties of 59 void galaxies as part of the Void Galaxy Survey (VGS). Current star formation rates are derived from H α and recent star formation rates from near-UV imaging. In addition, infrared 3.4, 4.6, 12 and 22 μm Wide-field Infrared Survey Explorer emission is used as star formation and mass indicator. Infrared and optical colours show that the VGS sample displays a wide range of dust and metallicity properties. We combine these measurements with stellar and $\rm {H\,\small {I}}$ masses to measure the specific SFRs (SFR/ M * ) and star formation efficiencies ( $\rm {SFR/{\it M }_{H\,\small {I}}}$ ). We compare the star formation properties of our sample with galaxies in the more moderate density regions of the cosmic web, ‘the field’. We find that specific SFRs of the VGS galaxies as a function of stellar and $\rm {H\,\small {I}}$ mass are similar to those of the galaxies in these field regions. Their SFR α is slightly elevated than the galaxies in the field for a given total $\rm {H\,\small {I}}$ mass. In the global star formation picture presented by Kennicutt–Schmidt, VGS galaxies fall into the regime of low average star formation and correspondingly low $\rm {H\,\small {I}}$ surface density. Their mean $\rm {SFR\,\alpha /{\it M}_{H\,\small {I}}}$ and SFR α/ M * are of the order of 10 – 9.9 yr – 1 . We conclude that while the large-scale underdense environment must play some role in galaxy formation and growth through accretion, we find that even with respect to other galaxies in the more mildly underdense regions, the increase in star formation rate is only marginal.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
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  • 5
    Publication Date: 2016-03-08
    Description: We study the star formation properties of 59 void galaxies as part of the Void Galaxy Survey (VGS). Current star formation rates are derived from H α and recent star formation rates from near-UV imaging. In addition, infrared 3.4, 4.6, 12 and 22 μm Wide-field Infrared Survey Explorer emission is used as star formation and mass indicator. Infrared and optical colours show that the VGS sample displays a wide range of dust and metallicity properties. We combine these measurements with stellar and $\rm {H\,\small {I}}$ masses to measure the specific SFRs (SFR/ M * ) and star formation efficiencies ( $\rm {SFR/{\it M }_{H\,\small {I}}}$ ). We compare the star formation properties of our sample with galaxies in the more moderate density regions of the cosmic web, ‘the field’. We find that specific SFRs of the VGS galaxies as a function of stellar and $\rm {H\,\small {I}}$ mass are similar to those of the galaxies in these field regions. Their SFR α is slightly elevated than the galaxies in the field for a given total $\rm {H\,\small {I}}$ mass. In the global star formation picture presented by Kennicutt–Schmidt, VGS galaxies fall into the regime of low average star formation and correspondingly low $\rm {H\,\small {I}}$ surface density. Their mean $\rm {SFR\,\alpha /{\it M}_{H\,\small {I}}}$ and SFR α/ M * are of the order of 10 – 9.9 yr – 1 . We conclude that while the large-scale underdense environment must play some role in galaxy formation and growth through accretion, we find that even with respect to other galaxies in the more mildly underdense regions, the increase in star formation rate is only marginal.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
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  • 6
    Publication Date: 2013-11-19
    Keywords: peer-reviewed
    Type: paper
    Format: application/pdf
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  • 7
  • 8
    Publication Date: 2018-02-06
    Type: paper
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  • 9
    Publication Date: 2019-01-21
    Type: report
    Format: application/pdf
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  • 10
    Publication Date: 2015-01-12
    Type: paper
    Format: application/pdf
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