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  • Prodinra, Archive Ouverte  (31)
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Year
  • 1
    Language: English
    In: Proceedings of the National Academy of Sciences of the United States of America, 04 April 2017, Vol.114(14), pp.E2802-E2803
    Description: In their recent article, Coyte et al. (1) use an innovative combination of microfluidic experiments, mechanistic models, and game theory to study the impact of physical microenvironments on the activity of bacteria in porous media. The authors find that hydrodynamics can profoundly affect...
    Keywords: Biological Evolution ; Environment
    ISSN: 00278424
    E-ISSN: 1091-6490
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  • 2
    Language: English
    In: International Journal of Nursing Studies, December 2016, Vol.64, pp.96-97
    Description: In a recent article in this journal, Duffy et al. (2016) present a well thought-out list of points to pay attention to in order to maximize the chances that a manuscript, submitted for publication, sail through the review process and eventually get printed. There is no doubt that this thorough...
    Keywords: Nursing
    ISSN: 0020-7489
    E-ISSN: 1873-491X
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  • 3
    Language: English
    In: Journal of Hydrology, December 2017, Vol.555, pp.253-256
    Description: In the last decade, X-ray computed tomography (CT) has become widely used to characterize the geometry and topology of the pore space of soils and natural porous media. Regardless of the resolution of CT images, a fundamental problem associated with their use, for example as a starting point in simulation efforts, is that sub-resolution pores are not detected. Over the last few years, a particular type of modeling method, known as "Grey" or "Partial Bounce Back" Lattice-Boltzmann (LB), has been adopted by increasing numbers of researchers to try to account for sub-resolution pores in the modeling of water and solute transport in natural porous media. In this short paper, we assess the extent to which Grey LB methods indeed offer a workable solution to the problem at hand. We conclude that, in spite of significant computational advances, a major experimental hurdle related to the evaluation of the penetrability of sub-resolution pores, is blocking the way ahead. This hurdle will need to be cleared before Grey LB can become a credible option in the microscale modeling of soils and sediments. A necessarily interdisciplinary effort, involving both modelers and experimentalists, is needed to clear the path forward.
    Keywords: Computer Modeling ; Transport Processes ; Image Resolution ; Measurement ; Interdisciplinary Research ; Geography
    ISSN: 0022-1694
    E-ISSN: 1879-2707
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  • 4
    Language: English
    In: Science of the Total Environment, 15 July 2018, Vol.630, pp.146-153
    Description: Thallium (Tl) is a toxic trace metal, whose geochemical behavior and biological effects are closely controlled by its chemical speciation in the environment. However, little tends to be known about this speciation of Tl in soil and plant systems that directly affect the safety of food supplies. In this context, the objective of the present study was to elaborate an efficient method to separate and detect Tl(I) and Tl(III) species for soil and plant samples. This method involves the selective adsorption of Tl(I) on microcolumns filled with immobilized oxine, in the presence of DTPA (diethylenetriaminepentaacetic acid), followed by DTPA-enhanced ultrasonic and heating-induced extraction, coupled with ICP-MS detection. The method was characterized by a LOD of 0.037 μg/L for Tl(I) and 0.18 μg/L for Tl(III) in 10  mL samples. With this method, a second objective of the research was to assess the speciation of Tl in pot and field soils and in green cabbage crops. Experimental results suggest that DTPA extracted Tl was mainly present as Tl(I) in soils (〉95%). Tl in hyperaccumulator plant green cabbage was also mainly present as Tl(I) (〉90%). With respect to Tl uptake in plants, this study provides direct evidence that green cabbage mainly takes up Tl(I) from soil, and transports it into the aboveground organs. In soils, Tl(III) is reduced to Tl(I) even at the surface where the chemical environment promotes oxidation. This observation is conducive to understanding the mechanisms of Tl isotope fractionation in the soil-plant system. Based on geochemical fraction studies, the reducible fraction was the main source of Tl getting accumulated by plants. These results indicate that the improved analytical method presented in this study offers an economical, simple, fast, and sensitive approach for the separation of Tl species present in soils at trace levels.
    Keywords: Tl Speciation ; Extraction ; Soil ; Green Cabbage ; Geochemical Fraction ; Tl Bioavailability ; Environmental Sciences ; Biology ; Public Health
    ISSN: 0048-9697
    E-ISSN: 1879-1026
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  • 5
    Language: English
    In: Ecosystem Services, April 2017, Vol.24, pp.47-49
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.ecoser.2017.02.006 Byline: Philippe C. Baveye Abstract: * Actual measurements of ecosystem services are virtually lacking. * To obtain measurements, the concept of ecosystem may be an impediment. * Measurement techniques exist at other, well-defined physical scales. * A focus on measurements may actually help in transition to applications. Article History: Received 22 August 2016; Revised 2 February 2017; Accepted 4 February 2017
    Keywords: Ecology
    ISSN: 2212-0416
    E-ISSN: 2212-0416
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  • 6
    Article
    Article
    Language: English
    In: Spanish Journal of Soil Science, 2017, Vol.7(2), pp.146-148
    Description: Letter to the Editor
    Keywords: Scholarly Publishing ; Soil Science ; Bibliometrics
    ISSN: 2253-6574
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  • 7
    Language: English
    In: Revista Brasileira de Ciência do Solo, 01 June 2015, Vol.39(3), pp.637-642
    Description: In recent years, many researchers have claimed that world reserves of rock phosphate were getting depleted at an alarming rate, putting us on the path to scarcity of that essential resource within the next few decades. Others have claimed that such alarmist forecasts were frequent in the past and have always been proven unfounded, making it likely that the same will be true in the future. Both viewpoints are directly relevant to the level of funding devoted to research on the use of phosphate fertilizers. In this short essay, it is argued that information about future reserves of P or any other resource are impossible to predict, and therefore that the threat of a possible depletion of P reserves should not be used as a key motivation for an intensification of research on soil P. However, there are other, more compelling reasons, both geopolitical and environmental, to urgently step up our collective efforts to devise agricultural practices that make better use of P than is the case at the moment.
    Keywords: Reservas de Fósforo ; Disponibilidade de Fósforo ; Depleção de Fósforo ; Segurança Alimentar
    ISSN: 1806-9657
    Source: Directory of Open Access Journals (DOAJ)
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  • 8
    Language: English
    In: Geoderma, 01 June 2016, Vol.271, pp.254-255
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.geoderma.2015.11.025 Byline: Philippe C. Baveye, Magdeline Laba Article History: Received 18 September 2015; Accepted 19 November 2015
    Keywords: Proximal Sensing ; Spatial Variability ; Soil Contamination ; Remediation ; Toxicology ; Agriculture
    ISSN: 0016-7061
    E-ISSN: 1872-6259
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  • 9
    Language: English
    In: Frontiers in Environmental Science, 01 June 2016, Vol.4
    Description: Over the last few years, considerable attention has been devoted in the scientific literature and in the media to the concept of ecosystem services of soils. The monetary valuation of these services, demanded by many governments and international agencies, is often depicted as a necessary condition for the preservation of the natural capital that soils represent. This focus on soil services is framed in the context of a general interest in ecosystem services that allegedly started in 1997, and took off in earnest after 2005. The careful analysis of the literature proposed in this article shows that, in fact, interest in the multifunctionality of soils emerged already in the mid-60s, at a time when hundreds of researchers worldwide were trying, and largely failing, to figure out how to put price tags meaningfully on nature's services. Soil scientists, since, have tried to better understand various functions/services of soils, as well as their possible relation with key soil characteristics, like biodiversity. They have also tried to make progress on the challenging quantification of soil functions/services. However, researchers have shown very little interest in monetary valuation, undoubtedly in part because it is not clear what economic and financial markets might do with prices of soil functions/services, even if we could somehow come up with such numbers, and because there is no assurance at all, based on neoclassical economic theory, that markets would manage soil resources optimally. Instead of monetary valuation, focus in the literature has been put on decision-making methods, like Multi-Criteria Decision Analysis (MCDA) and Bayesian Belief Networks (BBN), which do not require the systematic monetization of soil functions/services and easily accommodate deliberative approaches involving a variety of stakeholders. A prerequisite to progress in such public deliberations is that participants be very cognizant of the extreme relevance of soils to many aspects of their daily life. We argue that, as long as this prerequisite is satisfied, the combination of deliberative decision-making methods and of a sound scientific approach to the quantification of soil functions/services is a very promising avenue to manage effectively and ethically the priceless heritage that soils constitute.
    Keywords: Decision Making ; Sustainability ; Valuation ; Commodification ; Land Use and Management ; Ecosystem Services ; Environmental Sciences
    E-ISSN: 2296-665X
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  • 10
    Language: English
    In: Frontiers in Environmental Science, 01 November 2018, Vol.6
    Description: [...]Shelef et al. review the value of native plants and local production as a means to promote food diversity and agricultural resilience. [...]Chedraoui et al. review in detail the literature devoted to Capparis spinosa (L.), a xerophilous species with a broad range of benefits and potentialities for...
    Keywords: Agroecology ; Best Management Practices ; Biotic and Abiotic Stresses ; Environmental Sustainability ; Native Plants ; Environmental Sciences
    E-ISSN: 2296-665X
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