Die Definitionen von Grauwacke,Arkose und Ton     

Wilhelm Salomon 《International Journal of Earth Sciences》1916,6(7-8):398-404

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Bücher- und Zeitschriftenschau     

Rudolf Leutelt  Leuchs  Wilckens  W. Salomon  Chudoba  L. Rüger  Otto Wilckens 《International Journal of Earth Sciences》1929,20(4-5):371-383

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Ein geologischer Querschnitt durch den Vogelsberg von Gießen bis Stockhausen bei Lauterbach     

Wilhelm Schottler 《International Journal of Earth Sciences》1931,22(3-4):161-168

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Bücher- und Zeitschriftenschau     

Hummel  J. Sölch  Wcks  Salomon  L. Kober  St.  H. Cl 《International Journal of Earth Sciences》1924,15(1):87-96

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Die Bildung der Dreikanter     

San.-Rat Dr. Wilhelm Pfannkuch 《International Journal of Earth Sciences》1913,4(5-6):311-318

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Gas concentration cells for the conversion of ocean wave energy     

R.E. Salomon  S.M. Harding 《Ocean Engineering》1979,6(3):317-327

The concept of using electrochemical gas concentration cells to convert the mechanical potential energy of ocean waves to electricity using a taut-moored buoy is analyzed. Several idealized embodiments are discussed and one of these is shown to have particular merit. Some results obtained in an experimental program aimed at developing such a system are described. In particular, an electrochemical cell employing the protonically conducting synthetic polymer Nafion, bounded by platinum electrodes, has been studied in a manner which simulates the operation of such a device within a taut-moored buoy subject to ocean waves. It is shown that with some modest engineering advances, this system is indeed capable converting a significant fraction of ocean wave energy into electricity.  相似文献   

Physiological changes in the coastal marine cyanobacterium Synechococcus sp. PCC 7002 exposed to low ferric ion levels     

Charles G. Trick  Steven W. Wilhelm 《Marine Chemistry》1995,50(1-4)

Cyanobacteria are ubiquitous in marine waters. These prokaryotic cells are of particular interest in areas of the ocean where the availability of iron may be limiting for cell growth since these organisms commonly excrete iron-specific organic ligands (siderophores) in response to low levels of iron. It is generally considered that the production of siderophores provides a competitive advantage over the competing microorganisms that do not produce these ligands.In order to ascertain the influence of iron availability on the physiology of picoplanktonic cyanobacteria we performed a series of experiments on the coastal coccoid cyanobacterium, Synechococcus sp. PCC 7002. Physiological responses were examined in cells grown in a continuous cuture system with influx media containing a range of iron concentrations (from 4.2 × 10⁻⁵ to 5.1 × 10⁻⁹ M FeCl₃). Steady-state growth rates, combined with growth data from batch cultures demonstrated a non-linear response between iron availability and cell proliferation: cell yields were considerably higher in the lowest-iron chemostats than predicted based on the yields in the higher-iron chemostats. The higher yields during low-iron growth corresponded with the production of the extracellular siderophores and the induction of the specific iron-siderophore membrane transport proteins. A comparison of iron transport and carbon acquisition rates between the low-iron grown cells and the high-iron grown cells indicates that under low-iron growth conditions, iron and carbon acquisition meets the growth demands of the cells, whereas growth at higher iron levels enabled excessive (luxury) carbon acquisition and storage. We conclude that cyanobacteria are efficiently adapted to grow in low-iron environments (providing sufficient light for photosynthesis is available) and the luxury-uptake of carbon may serve as the source material for the extracellular ligands released by these cells. Since the release of siderophores was at iron levels in excess of the levels that induce the siderophore-mediated transport of iron, cyanobacteria growing in an environment with varying levels of iron may contribute substantial amounts of their stored carbon reserves into the DOC as iron-specific ligands.  相似文献   

Decoding dispossession: Eviction and urban regeneration in Johannesburg's dark buildings          下载免费PDF全文

Matthew Wilhelm‐Solomon 《Singapore journal of tropical geography》2016,37(3):378-395

In January 2012 the residents of an inner‐city tenement building in Doornfontein, Johannesburg, were evicted on a court order. The building was situated in a post‐industrial neighbourhood in which thousands of South Africans and foreign nationals, many blind or disabled, live in unlawfully occupied buildings without access to water, basic sanitation, electricity and waste management services. Such buildings are known in policy discourse as ‘bad buildings’, and informally as ‘dark buildings’, invoking both a sense of developmental failure and spiritual insecurity. In this paper I analyse how urban renewal policies created social divisions and alliances not only among the residents of Chambers, which were channelled along nationalist lines, but also between the able‐bodied and disabled, and produced new social alliances. In particular, I document how a group of blind Zimbabweans experienced threats of violence and accusations of betrayal, as they were offered alternate accommodation by the evicting company because of their disability. I argue here that the pressures of private‐sector housing developments intersected with the insecurities and divisions of inner‐city social spaces and also fostered new alliances. Following the work of Deleuze and Guattari, I invoke the concept of ‘decoding dispossession’, proposing that ongoing evictions and dispossessions are characterized by simultaneous movements of ‘decoding and deterritorialization’ and ‘overcoding‐reterritorialization’.  相似文献   

Geothermal evolution of the Astrakhan Arch region of the Pricaspian basin     

Alik Ismail-Zadeh  Helmut Wilhelm  Yuri Volozh 《International Journal of Earth Sciences》2008,97(5):1029-1043

The Astrakhan Arch region contains one of the largest sub-salt structures of the Pricaspian basin, where perspectives for hydrocarbon generation and accumulation in the Devonian to Carboniferous deposits are considered to be high. The paper addresses the problem of structural and geothermal evolution of the region deformed by salt movements. Initially, we developed a model of the regional structural evolution along a geological profile using the volume-balancing and back-stripping methods and geological constraints on the sedimentation, erosion, and paleo-water depths. Then we developed geothermal models (along the study profile) associated with the regional structural evolution. The models were constrained by the temperatures measured in four deep boreholes along the profile. We show that the present temperatures and heat flux are influenced by the presence of salt diapirs. Since the Early Carboniferous and till Middle Permian times, the temperatures predicted by the models vary significantly due to the regional transgression and the presence of seawater. The temperature of Devonian–Carboniferous carbonates increases since the Late Permian (time of post-salt deposition) and attains its maximum values in the SW-part of the profile. If the model assumptions concerning the constant vertical and zero lateral heat fluxes are valid, we can conclude that hydrocarbons are most likely to be generated in the SW-part of the region for the post-Early Permian time.  相似文献   

Seismic rupture during the 1960 Great Chile and the 2010 Maule earthquakes limited by a giant Pleistocene submarine slope failure     

Jacob Geersen  David Völker  Jan H. Behrmann  Dirk Kläschen  Wilhelm Weinrebe  Sebastian Krastel  Christian Reichert 《地学学报》2013,25(6):472-477

Determining factors that limit coseismic rupture is important to evaluate the hazard of powerful subduction zone earthquakes such as the 2011 Tohoku‐Oki event (Mw = 9.0). In 1960 (Mw = 9.5) and 2010 (Mw = 8.8), Chile was hit by such powerful earthquakes, the boundary of which was the site of a giant submarine slope failure with chaotic debris subducted to seismogenic zone depth. Here, a continuous décollement is absent, whereas away from the slope failure, a continuous décollement is seismically imaged. We infer that underthrusting of inhomogeneous slide deposits prevents the development of a décollement, and thus the formation of a thin continuous slip zone necessary for earthquake rupture propagation. Thus, coseismic rupture during the 1960 and 2010 earthquakes seems to be limited by underthrusted upper plate mass‐wasting deposits. More generally, our results suggest that upper plate dynamics and resulting surface processes can play a key role for determining rupture size of subduction zone earthquakes.  相似文献