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  • 2000-2004  (312)
  • 1970-1974  (18)
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  • 1
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    Integration of two simple models in a geographical information system to evaluate salinization risk in irrigated land of the Valencian Community, Spain (2004)
    Wiley
    Details
    Publication Date: 2004-09-01
    Print ISSN: 0266-0032
    Electronic ISSN: 1475-2743
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Wiley on behalf of British Society of Soil Science.
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  • 2
    Electronic Resource
    Electronic Resource
    Integration of two simple models in a geographical information system to evaluate salinization risk in irrigated land of the Valencian Community, Spain (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 20 (2004), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. Salt affected soil is one of the main problems decreasing the productivity of irrigated agriculture in the Mediterranean area. Simulation models in combination with geographical information systems (GISs) could be used to evaluate the risk of salinization at a regional scale. In this study, two logical models (Pla and Riverside) were combined in a GIS to evaluate the risk of soil salinity and sodicity in the irrigated agriculture of the Valencian Community, Spain. Simple models were chosen so that they could be used at a regional scale. Before running them in a GIS framework, a soil and irrigation water survey was conducted to validate the models with observed data. The Pla model fitted observed data better than Riverside guidelines, probably because parameters of water quality, soil and climate were considered by the Pla model. The resulting maps indicated that the soils most affected by salts are those located in the south of study area, owing to the arid climate, and those areas near the coast due to saline intrusion. Close to 42% of the irrigated area was predicted to be somewhat affected by salinization. The regional-scale soil salinity assessment presented here for the Valencian Community is the first to be made for this region and will be useful in targeting critical areas that may require special management.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.2004.tb00378.x
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  • 3
    Electronic Resource
    Electronic Resource
    Entry and Managerial Incentives: A Note (2000)
    Oxford, UK and Boston, USA : Blackwell Publishers Ltd
    Bulletin of economic research 52 (2000), S. 0 
    Details
    ISSN: 1467-8586
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: This note reinforces the results in a paper by Sen (International Journal of Industrial Organization, vol. 11, 1993, pp. 123–37). It is shown that his assumption that the incentive schemes in a two-period model are the same for the two periods is not necessary for the results: only the long-term nature of contracts with managers matters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1467-8586.00102
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  • 4
    Electronic Resource
    Electronic Resource
    Surface Tension Observation in Distilled and Saline Water Interface (1970)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 9 (1970), S. 509-511 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i160035a036
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  • 5
    Electronic Resource
    Electronic Resource
    α-Amino alcohols as products of a reductive side reaction of denatured collagen with sodium borohydride (1970)
    s.l. : American Chemical Society
    Biochemistry 9 (1970), S. 2123-2127 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00812a014
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  • 6
    Electronic Resource
    Electronic Resource
    Activity development leadership and geographic areas in Spain (2000)
    Bradford, West Yorkshire [u.a.] : Emerald
    Journal of property investment & finance 18 (2000), S. 371-398 
    Details
    ISSN: 1463-578X
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Economics
    Notes: Theory and empirical research show how building cycles' behaviour has substantial differences within countries among its different geographical areas. There is evidence of the existence of specific area leadership regarding development activity and how this influence is transmitted to the rest of the country as a locomotive effect in residential construction. This means that the aggregate building cycle could strongly depend on cycles in specific areas. This paper follows this approach and investigates the relationship between geographic areas' intensity in housing construction, showing how activity development in some of these areas is influencing the rest of the country. This process is analysed in Spain during the 1990s, using information on house licenses of construction given by regional areas and applying cointegration methodology to identify leading areas in building activity. Some leadership effect is found in the Levante area attracting building activity from the rest of the country during this period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/14635780010339262
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  • 7
    Electronic Resource
    Electronic Resource
    The role of social capital in today's economy: Empirical evidence and proposal of a new model of intellectual capital (2004)
    Bingley : Emerald
    Journal of intellectual capital 5 (2004), S. 556-574 
    Details
    ISSN: 1469-1930
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Economics
    Notes: The rapid and well-known evolution - considered by many observers to be revolutionary - from industrial society to knowledge society, defined by the importance of knowledge creation processes, is showing the relevance of the social capital of organizations. This study seeks to contribute to the development of this new concept. First, presents the theoretical background of social capital. Second, based on an intellectual capital approach, tests the situation of social capital in some Spanish companies, with a reference to the international landscape. The findings of the research support the convenience of the development of an integral framework for the management of intangibles that create future benefits, considering the relations with several social agents. Concludes by proposing a model of intellectual capital that expressly includes social capital.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/14691930410567013
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  • 8
    Electronic Resource
    Electronic Resource
    Determinants of housing prices in Spanish cities (2003)
    Bradford, West Yorkshire [u.a.] : Emerald
    Journal of property investment & finance 21 (2003), S. 109-135 
    Details
    ISSN: 1463-578X
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Economics
    Notes: Residential price levels in Spain vary broadly among markets. Real estate theory explains that prices depend on market characteristics such as vacancy level, land availability, construction supply elasticity to respond to high or low speed to changes on the demand, as well as potential for economic growth, industrial and services activities located inside urban areas, etc. An analysis of prices in Spanish main cities shows that tensions appear to exist in some of them where economic activity shows different dynamism and price level appears to be independent of it. This paper tries to find evidence of the existing relationship between residential prices and economic and demographic factors that are demand determinants such as wages, migrations and productive structure, among others, to explain price formation in Spanish cities. It uses panel data and GLS methodology applied to 71 main Spanish province capitals and cities with more than 100,000 inhabitants. The results show evidence of determinants of housing prices and how some relationships appear to exist between price levels and families' waged income as well as with population and productive structure in Spanish cities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/14635780310469102
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  • 9
    Electronic Resource
    Electronic Resource
    Proliferating cell nuclear antigen expression in maize seed development and germination: Regulation by phytohormones and its association with putative cell cycle proteins (2000)
    Copenhagen : Munksgaard International Publishers
    Physiologia plantarum 110 (2000), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The proliferating cell nuclear antigen (PCNA) plays a fundamental role in DNA replication and repair and recently, it has been found associated to proteins that control the G1 phase of the cell cycle, such as cyclin D. Maize PCNA cDNA has been cloned and overexpressed in order to raise antibodies. The expression of PCNA has been followed during seed development and seed germination using the homologous antibodies. The protein was found at a constant level during seed development up to 48 days after pollination (DAP) and then the amount declined to very low levels, similar to those found in dry seeds. Upon germination, PCNA levels rose gradually reaching a peak by 20 h germination. Imbibition in the presence of cytokinins (Benzyladenine, BA) produced a sharp increase in amount during the first 3–6 h germination, whereas imbibition in the presence of abscisic acid (ABA) did not alter the pattern of expression as compared with control seeds. Immunoprecipitation experiments showed that PCNA was associated to a putative cyclin D protein during germination and this association was altered by phytohormones. While the complex PCNA-cyclin D-like protein was present along the first 15 h of germination under control conditions, it was dissociated after 6 h if embryo axes germinated in the presence of BA or ABA. However, complex dissociation in the presence of BA was due to degradation of the putative cyclin D protein while in the presence of ABA the putative cyclin D was still present. These results are discussed in the context of seed germination and the cell cycle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1399-3054.2000.110117.x
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  • 10
    Electronic Resource
    Electronic Resource
    Activation of Pozzolanic Reaction of Hydrated Portland Cement Fly Ash Pastes in Sulfate Solution (2002)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 85 (2002), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The activation of the pozzolanic reaction of fly ash in portland cement paste immersed in sulfate solution has been studied. Mixtures of two Spanish fly ashes (ASTM class F) with 0%, 15%, and 35% replacement of portland cement by fly ash were immersed in Na2SO4 solution, of 2880 ppm SO42− concentration, for a period of 90 days. The resistance of the different mixtures to the sulfate attack was evaluated using the Koch-Steinegger test. The results showed that all of the mixtures were sulfate resistant, despite the high Al2O3 content of the fly ash. The diffusion of SO42− and Na+ ions through the pore solution activated the pozzolanic reactivity of the fly ashes, causing microstructural changes, which were characterized by X-ray diffraction (XRD), mercury intrusion porosimetry (MIP), and scanning electron microscopy (SEM). As a result, the flexural strength of the mixtures increased, principally for the fly ash of a lower particle size and 35% of addition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2002.tb00581.x
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