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  • Carbon sequestration
  • Egypt
  • Springer  (81)
  • American Association for the Advancement of Science  (2)
  • Alexandria: National Institute of Oceanographic and Fisheries  (1)
  • 1
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    The Kamil Crater in Egypt (2010)
    American Association for the Advancement of Science
    Details
    Publication Date: 2020-12-21
    Description: BREVIA
    Description: We report on the discovery in southern Egypt of an impact crater 45 m in diameter with a pristine rayed structure. Such pristine structures have been previously observed only on atmosphereless rocky or icy planetary bodies in the Solar System. This feature and the association with an iron meteorite impactor and shock metamorphism provides a unique picture of small-scale hypervelocity impacts on the Earth's crust. Contrary to current geophysical models, ground data indicate that iron meteorites with masses of the order of tens of tons can penetrate the atmosphere without significant fragmentation.
    Description: Published
    Description: 804
    Description: 1.8. Osservazioni di geofisica ambientale
    Description: 3.8. Geofisica per l'ambiente
    Description: JCR Journal
    Description: open
    Keywords: Impact crater ; Egypt ; geophysical exploration ; ataxite ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
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    Assessment of some heavy metals, major cations and organic matter in the recent sediments of Bardawil Lagoon, Egypt (2006)
    Alexandria: National Institute of Oceanographic and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: This journal is published by National Institute of Oceanography and Fisheries, Alexandria, Egypt
    Description: The aim of the present study is to gather detailed information on the distribution and concentration levels of some heavy metals (Fe, Mn, Zn, Cu, Pb & Cd), major cations (Ca,Mg, Na & K), in addition to organic matter in the Bardawil lagoon sediments during four successive seasons during (2001-2002). The different metals concentrations could be arranged in descending order as follows: - Ca〉 Na〉 Fe〉 Mg〉 K〉 Mn〉 Cu〉 Zn〉 Pb〉 Cd.
    Description: NIOF- Alexandria
    Description: Published
    Keywords: Sediments ; Egypt ; Bardawil Lake ; Abiotic factors ; Heavy metals
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
    Format: 28381 bytes
    Format: 270534 bytes
    Format: application/pdf
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  • 3
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    Revisiting carbon flux through the ocean's twilight zone (2010)
    American Association for the Advancement of Science
    Details
    Publication Date: 2017-01-04
    Description: Citation only. Published in Science 316: 567-570, doi: 10.1126/science.1137959
    Description: Funding was obtained primarily through the NSF, Ocean Sciences Programs in Chemical and Biological Oceanography, with additional support from the U.S. Department of Energy, Office of Science, Biological and Environmental Research Program, and other national programs, including the Australian Cooperative Research Centre program and Australian Antarctic Division.
    Keywords: Carbon flux ; Carbon sequestration ; Biological pump
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 4
    Electronic Resource
    Electronic Resource
    Identification of four components from the female sex pheromone of the lima-bean pod borer, Etiella zinckenella (1989)
    Springer
    Entomologia experimentalis et applicata 51 (1989), S. 107-112 
    Details
    ISSN: 1570-7458
    Keywords: sex pheromone ; lima-bean pod borer ; Etiella zinckenella ; Lepidoptera ; Phycitidae ; (Z)-11-tetradecenyl acetate ; (E)-11-tetradecenyl acetate ; (Z)-9-tetradecenyl acetate ; tetradecyl acetate ; Hungary ; Egypt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé A partir de femelles d'E. zinckenella d'origines hongroise et égyptienne, nous avons isolé quatre composés par chromatographie en phase gazeuse avec ionisation de flamme et électroantennographie (EAD): l'acétate de tétradécanyl, l'acétate (Z)-11-tétradécényl, l'acétate (E)-11-tétradécényl et l'acétate (Z)-11-tétradécényl. Les acétates monoinsaturés donnent les meilleures réponses en EAG parmi une série d'acétates tétradécényls et de tétradécénols. Les quatre composés mélangés dans les mêmes proportions que dans l'extrait de la phéromone ont attiré un nombre significatif de mâles tant en Egypte qu'en Hongrie. Dans un test préliminaire de soustraction, la meilleure capture a été réalisée par le mélange ternaire d'acétates monoinsaturés.
    Notes: Abstract Four compounds, tetradecyl acetate, (Z)-9-tetradecenyl acetate, (E)-11-tetradecenyl acetate and (Z)-11-tetradecenyl acetate were identified from female sex pheromone extracts of Hungarian and Egyptian lima-bean pod borers (Etiella zinckenella Tr., Lepidoptera: Phycitidae) by gas chromatography with flame ionization (FID) and electroantennographic (EAD) detection. In EAG studies these monoun-saturated acetates gave the best responses in a series of other tetradecenyl acetates and tetradecenols. The four component blend of the identified components in similar ratios as in the pheromone extract attracted significant numbers of male lima-bean pod borers in both Hungary and Egypt. In a preliminary subtraction test best capture was achieved by the ternary mixture of the monounsaturated acetates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00186727
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  • 5
    Electronic Resource
    Electronic Resource
    The Cultural Specificity of Management Constructs: An Empirical Examination (1997)
    Springer
    International journal of value-based management 10 (1997), S. 247-271 
    Details
    ISSN: 1572-8528
    Keywords: Egypt ; culture ; management ; job satisfaction ; organizational commitment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract The management literature reports on numerous studies examining relationships among the variables of job satisfaction and organizational commitment, and more recently organizational character, organizational citizenship behavior, and propensity for participative decision making. The present study empirically examines relationships among these constructs among Egyptian managers. Although general support was demonstrated for the previously validated scales, the evidence suggests that these constructs are culturally specific and must be redefined, especially in emerging countries. Further, findings support some, but not all of the conclusions typically reached in existing studies of Western managers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007701229378
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  • 6
    Electronic Resource
    Electronic Resource
    Mitigation of atmospheric CO2 concentrations by increased carbon sequestration in the soil (1998)
    Springer
    Biology and fertility of soils 27 (1998), S. 230-235 
    Details
    ISSN: 1432-0789
    Keywords: Key words Carbon dioxide ; Carbon sequestration ; Climate change ; Greenhouse gases ; Mitigation options
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  The International Panel on Climate Change distinguished three main options for the mitigation of atmospheric CO2 concentrations by the agricultural sector: (1) reduction of agriculture-related emissions, (2) creation and strengthening of C sinks in the soil, and (3) production of biofuels to replace fossil fuels. Options for sustained sequestration of C in the soil through adapted management of land resources are reviewed in the context of the ongoing discussion on the need to reduce greenhouse gas concentrations in the atmosphere. Enhanced sequestration of atmospheric CO2 in the soil, ultimately as stable humus, may well prove a more lasting solution than (temporarily) sequestering CO2 in the standing biomass through reforestation and afforestation. Such actions will also help to reverse processes of land degradation, thus contributing to sustained food productivity and security for the people in the regions concerned.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050425
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  • 7
    Electronic Resource
    Electronic Resource
    Regional estimates of carbon sequestration potential: linking the Rothamsted Carbon Model to GIS databases (1998)
    Springer
    Biology and fertility of soils 27 (1998), S. 236-241 
    Details
    ISSN: 1432-0789
    Keywords: Key words Soil organic carbon ; Geographical Information Systems ; Modelling ; Carbon sequestration ; Hungarian soils
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  Soil organic matter (SOM) represents a major pool of carbon within the biosphere. It is estimated at about 1400 Pg globally, which is roughly twice that in atmospheric CO2. The soil can act as both a source and a sink for carbon and nutrients. Changes in agricultural land use and climate can lead to changes in the amount of carbon held in soils, thus, affecting the fluxes of CO2 to and from the atmosphere. Some agricultural management practices will lead to a net sequestration of carbon in the soil. Regional estimates of the carbon sequestration potential of these practices are crucial if policy makers are to plan future land uses to reduce national CO2 emissions. In Europe, carbon sequestration potential has previously been estimated using data from the Global Change and Terrestrial Ecosystems Soil Organic Matter Network (GCTE SOMNET). Linear relationships between management practices and yearly changes in soil organic carbon were developed and used to estimate changes in the total carbon stock of European soils. To refine these semi-quantitative estimates, the local soil type, meteorological conditions and land use must also be taken into account. To this end, we have modified the Rothamsted Carbon Model, so that it can be used in a predictive manner, with SOMNET data. The data is then adjusted for local conditions using Geographical Information Systems databases. In this paper, we describe how these developments can be used to estimate carbon sequestration at the regional level using a dynamic simulation model linked to spatially explicit data. Some calculations of the potential effects of afforestation on soil carbon stocks in Central Hungary provide a simple example of the system in use.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050426
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  • 8
    Electronic Resource
    Electronic Resource
    Age and tectonic setting of granitoid gneisses in the Eastern Desert of Egypt and south-west Sinai (1994)
    Springer
    International journal of earth sciences 83 (1994), S. 502-513 
    Details
    ISSN: 1437-3262
    Keywords: Eastern Desert ; Egypt ; Granitoid gneisses ; Single zircon dating
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Strongly deformed and locally migmatized gneisses occur at several places in the southern Eastern Desert of Egypt and in Sinai and have variously been interpreted as a basement to Pan-african (≈900 to 600 Ma) supracrustal and intrusive assemblages. A suite of grabbroic to granitic gneisses was investigated in the Hafafit area, which constitutes an I-type calc-alkaline intrusive assemblage whose chemistry suggests emplacement along an active continental margin and whose granitoid members can be correlated with the so-called ‘Older Granites’ of Egypt.207Pb/206Pb single zircon evaporation from three samples of the Hafafit gneisses yielded protolith emplacement ages between 677 ± 9 and 700 ± 12 Ma and document granitoid activity over a period of about 23 Ma. A migmatitic granitic gneiss from Wadi Bitan, south-west of Ras Banas, has a zircon age of 704 ± 8 Ma, and its protolith was apparently generated during the same intrusive event as the granitoids at Hafafit. Single zircons from a dioritic gneiss from Wadi Feiran in south-west Sinai suggest emplacement of the protolith at 796 ± 6 Ma and this is comparable with ages for granitoids in north-east Sinai and southern Israel. None of the above gneisses is derived from remelting of older continental crust, but they are interpreted as reflecting subduction-related calc-alkaline magmatism during early Pan-african magmatic arc formation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01083223
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  • 9
    Electronic Resource
    Electronic Resource
    Phanerozoic evolution of the basins of Northern Egypt and adjacent areas (1994)
    Springer
    International journal of earth sciences 83 (1994), S. 728-742 
    Details
    ISSN: 1437-3262
    Keywords: Basin dynamics ; Biostratigraphy ; Well data ; Geophysical data ; Egypt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The results of integrating geological well data and geophysical information from the subsurface of northern Egypt are presented in terms of basin dynamics. Recent biostratigraphic data from wells and scarce outcrops are shown to be critical to an understanding of syndepositional tectonics. Six tectonostratigraphic phases of basin evolution are recognized to span the Phanerozoic. These phases initially record the development of intracratonic subsidence, controlled by deep crustal strike-slip tectonics, as Nubian continental and Tethyan marine influences competed across the northern margin of Gondwanaland. Evidence is also presented for the formation of the present day continental margin to northern Egypt. After a phase of crustal stretching, oceanic rifting focused on the western margin of the Arabian Platform, propagating progressively westwards during the Early-Mid-Jurassic. Thereafter, the effects of passive subsidence on the continental margin were disturbed by discrete phases of intracratonic strike-slip, associated ‘Syrian Arc’ folding, and the formation of deep basins in the opening Red Sea and Gulf of Suez. Three structural fabrics persisted throughout Phanerozoic basin evolution, the result of repeated extensional reactivation and inheritance from Pan-African basement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00251071
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  • 10
    Electronic Resource
    Electronic Resource
    A structural synthesis of the Proterozoic Arabian-Nubian Shield in Egypt (1994)
    Springer
    International journal of earth sciences 83 (1994), S. 484-501 
    Details
    ISSN: 1437-3262
    Keywords: Arabian-Nubian Shield ; Egypt ; Pan-African orogeny ; Proterozoic ; Extensional collapse ; Thrust tectonics ; Transpression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Detailed structural geological and related studies were carried out in a number of critical areas in the Proterozoic basement of eastern Egypt to resolve the structural pattern at a regional scale and to assess the general characteristics of tectonic evolution, orogeny and terrane boundaries. Following a brief account of the tectonostratigraphy and timing of the orogenic evolution, the major structural characteristics of the critical areas are presented. Collisional deformation of the terranes ended about 615-600 Ma ago. Subsequent extensional collapse probably occurred within a relatively narrow time span of about 20 Ma (575 – 595 Ma ago) over the Eastern Desert and was followed by a further period of about 50 Ma of late to post-tectonic activity. The regional structures originated mainly during post-collisional events, starting with those related to extensional collapse (molasse basin formation, normal faulting, generation of metamorphic core complexes). Subsequent NNW-SSE shortening is documented by large-scale thrusting (towards the NNW) and folding, distributed over the Eastern Desert, although with variable intensity. Thrusts are overprinted by transpression, which was localized to particular shear zones. Early transpression produced, for example, the Allaqi shear zone and final transpression is documented in the Najd and Wadi Kharit-Wadi Hodein zones. Two terrane boundaries can be defined, the Allaqi and South Hafafit Sutures, which are apparently linked by the high angle sinistral strike-slip Wadi Kharit-Wadi Hodein shear zone with a tectonic transport of about 300 km towards the W/NW. In general, the tectonic evolution shows that extensional collapse is not necessarily the final stage of orogeny, but may be followed by further compressional and transpressional tectonism. The late Pan-African high angle faults were reactivated during Red Sea tectonics both as Riedel shears and normal faults, where they were oriented favourably with respect to the actual stress regime.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00194156
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