The impact of salt concentration on the mineral nutrition of Tetragonia tetragonioides

The purpose of the experiment was to study the e ect of salinity (NaCl) on growth, biomass production (total yield), mineral composition (macro- and micronutrient contents in leaves and the soil in which the plant is grown) of Tetragonia tetragonioides during the vegetation period. The experimental work was conducted in the greenhouse at the University of Lille 1, France, from 2 November 2015 to 25 January 2016. Three salinity treatments (T1 (50 mM NaCl), T2 (100 mM NaCl), T3 (200 mM NaCl)) and a control treatment (T0 (0 mM NaCl)) were applied. Analysis of the results showed that the total yield of the crop had low variation between the salinity treatments and the control treatment. The salt concentrations had an e ect on the macro- and micronutrient contents in leaves and soil. In conclusion, T. tetragonioides exhibited good potential for use as a species to remove salt. This is the main important finding of this research.Erasmus Mundus Euro-Asian CEA project for support of the European Joint Doctorate Program; JST CREST Grant Number JPMJCR17O2info:eu-repo/semantics/publishedVersio

Analyse mécanique et thermique des adhésifs et des joints collés

Mechanical and thermal analysis of adhesives bonded joints : a review -- Proposal of a torsion shear fixture for bonded joints -- The effect of filler content on the mechanical properties of epoxy based adhesives -- Moisture absorption effect of adhesive filled bonded joints

Effects of salinity on the Macro- and Micronutrient contents of a Halophytic Plant Species (Portulaca oleracea L.)

The main purpose of the two consecutive experimental studies presented here was to compare the effect of salinity on nutrients in leaves of the halophytic plant species Portulaca oleracea L. and in soil. The first experiment was conducted to study the effect of salinity on plant growth, biomass accumulation, yield, root layer development, salt accumulation, and the dynamics of changes in mineral substances in plants and soil. In the second experiment, P. oleracea seeds were sown directly into salinized soil (treated immediately before plant growth) to determine the nutrient levels in leaves and soil. Three salinity treatments (saline water solution with NaCl: T1, 5 dS m−1 ; T2, 9.8 dS m−1 ; and T3, 20 dS m−1 ) and a control treatment (T0, 1 dS m−1 ) were used in the first experiment. The soil in the second experiment was used in a previous study (performed immediately before P. oleracea growth) (salinized soil: T1, 7.2 dS m−1 ; T2, 8.8 dS m−1 ; T3, 15.6 dS m−1 ; T0, 1.9 dS m−1 ). The plants were irrigated with tap water at amounts in the range of 0.25–0.50 L/pot. Analysis of the experimental results showed that P. oleracea is resistant to salinity, is able to remove ions (400–500 kg ha−1 NaCl), and can be grown in saline soil. The results indicated that P. oleracea is able to grow in high-salinity soil. This finding was confirmed by the dry matter obtained under high-salinity conditions. Salinity stress affected nutrient uptake in leaves and soil.Erasmus Mundus European Joint Doctorate Programinfo:eu-repo/semantics/publishedVersio

Potential risks of metal toxicity in contaminated sediments of Deûle river in Northern France

International audienceThe aim of this paper was to evaluate the potential sediment cumulative damage and toxicity due to metal contamination in a polluted zone of Deûle river (in northern France) from nearby two smelters. Metal-enrichment factors and geoaccumulation indices measured with sediment depth revealed that - compared to background levels either in local reference soils or in world rivers sediments/suspended particulate matter - Cd contributed to the highest pollution levels, followed by Zn, Pb and to a much lesser extent Cu and Ni. A comparison of the vertical distribution of AVS (acid volatile sulfides), SEM (simultaneously extracted metals), TMC (total metal concentrations), TOC (total organic carbon) and interstitial water-metal concentrations in the sediment allowed us to highlight the extent of toxicity caused by Cd, Pb, Zn, Ni and Cu and to raise the possibility of their association with certain geochemical phases. To assess the actual environmental impacts of these metals in Deûle river, numerical sediment quality guidelines were further used in the present work. Sedimentary Pb, Zn, and Cd contents largely exceeded PEC (probable effect concentration) values reported as consensus-based sediment quality guidelines for freshwater ecosystems. As for risks of toxicity from pore waters, metal concentrations reached their maxima at the surficial layers of the sediment (1-3. cm) and IWCTU (Interstitial Water Criteria Toxicity Unit) observed for Pb and to a lesser extent Cd, violated the corresponding water quality data recommended by USEPA

The importance of training programs in the improvement of the performance of employees in the petroleum companies"- Case of Sonatrach company - The Regional Directorate of BERKAOUI (Ouargla- Algeria)

The training of the workers in the enterprises allows the development in the skills and knowledge of the employees. As the other Enterprises, the training programs in the petroleum companies got a great importance, which became more cleared through this study. Through the case study on Sonatrach subsidiary employees, and based on self-questionnaire our paper aims to analyze the training programs contribution in the improvement of the unit productivity level, and on the upgrading of the profitability and efficiency of the workers. Nevertheless, the importance of the training contribution appears undoubtedly in minimizing the lost days caused by the work accidents, which is a huge costs organization must cover Although the luck in decreasing in the rates of this accidents

The importance of training programs in the improvement of the performance of employees in the petroleum companies"- Case of Sonatrach company - The Regional Directorate of BERKAOUI (Ouargla- Algeria)

The training of the workers in the enterprises allows the development in the skills and knowledge of the employees. As the other Enterprises, the training programs in the petroleum companies got a great importance, which became more cleared through this study. Through the case study on Sonatrach subsidiary employees, and based on self-questionnaire our paper aims to analyze the training programs contribution in the improvement of the unit productivity level, and on the upgrading of the profitability and efficiency of the workers. Nevertheless, the importance of the training contribution appears undoubtedly in minimizing the lost days caused by the work accidents, which is a huge costs organization must cover Although the luck in decreasing in the rates of this accidents

The importance of training programs in the improvement of the performance of employees in the petroleum companies"- Case of Sonatrach company - The Regional Directorate of BERKAOUI (Ouargla- Algeria)

The training of the workers in the enterprises allows the development in the skills and knowledge of the employees. As the other Enterprises, the training programs in the petroleum companies got a great importance, which became more cleared through this study. Through the case study on Sonatrach subsidiary employees, and based on self-questionnaire our paper aims to analyze the training programs contribution in the improvement of the unit productivity level, and on the upgrading of the profitability and efficiency of the workers. Nevertheless, the importance of the training contribution appears undoubtedly in minimizing the lost days caused by the work accidents, which is a huge costs organization must cover Although the luck in decreasing in the rates of this accidents

Metal pollutants in Indian continental coastal marine sediment along a 3,700 km transect: An Electron Paramagnetic Resonance spectroscopic study

We report the analysis and geographical distribution of anthropogenically impacted marine surficial sediments along a 3700 km transect around the continental shelf of India. Sediments have been studied using a mixed analytical approach; high sensitivity electron paramagnetic resonance (EPR), chemical analysis and environmental magnetism. Indian coastal marine deposits are heavily influenced bymonsoon rains flushing sediment of geological and anthropogenic origin out of the subcontinental river systems. That is, climatic, hydro-, geo- and anthropogenic spheres couple strongly to determine the nature of Indian coastal sediments. Enrichment of Ni, Cu and Cr is observed in shelf sediments along both east and west coasts associated with industrialised activities in major urban areas. In the Gulf of Cambay and the Krishna and Visakhapatnam deltaic regions, levels of Ni and Cr pollutants (≥80 and ≥120 ppmrespectively) are observed, sufficient to cause at least mediumadverse biological effects in the marine ecosystem. In these areas sediment EPR spectra differ in characteristic from those of less impacted ones. Modelling enables deconvolution of EPR spectra. In conjunction with environmental magnetism techniques, EPR has been used to characterise species composition in coastal depositional environments. Paramagnetic species can be identified and their relative concentrations determined. EPR g-values provide information about the chemical and magnetic environment of metals. We observe g-values of up to 5.5 and large g-shifts indicative of the presences of a number of para and ferrimagnetic impurities in the sediments. EPR has enabled the characterisation of species composition in coastal depositional environments, yielding marine sediment environmental ‘fingerprints’. The approach demonstrates the potential of EPR spectroscopy in the mapping and evaluation of the concentration and chemical speciation in paramagnetic metals in sediments from marine shelf environments and their potential for source apportionment and environmental impact assessment