Search results for "SOI"

Photoreduction of carbon dioxide to formic acid in aqueous suspension: a comparison between phthalocyanine/TiO2 and porphyrin/TiO2 catalysed processes

2014

Composite materials prepared by loading polycrystalline TiO2 powders with lipophilic highly branched Cu(II)- and metal-free phthalocyanines or porphyrins, which have been used in the past as photocatalysts for photodegradative processes, have been successfully tested for the efficient photoreduction of carbon dioxide in aqueous suspension affording significant amounts of formic acid. The results indicated that the presence of the sensitizers is beneficial for the photoactivity, confirming the important role of Cu(II) co-ordinated in the middle of the macrocycles. A comparison between Cu(II) phthalocyanines and Cu(II) porphyrins indicated that the Cu(II)- phthalocyanine sensitizer was more e…

Estimation of the degrading genetic potential of soil bacterial communities: a new tool for evaluating and predicting soil contamination by organic m…

2007

During the last two centuries, industrialisation has led to increasing contamination of the environment by xenobiotics, notably aromatic compounds (i.e. PAHs, pesticides). These widespread pollutants are a major threat affecting soil quality and human health. In this context, numerous policies have been drawn up notably in Europe, to monitor the threats of pollution to ecosystems and to detect and implement measures to counterbalance the damage. Nevertheless, the European Commission and scientific community are still confronted with a lack of appropriate tools to monitor biodiversity in relation to environmental processes affecting global warming and soil protection. This study proposes too…

Le contentieux de la rupture abusive de relations d'affaires établies entre dans le champ d'application de la clause compromissoire stipulée dans le …

2012

International audience; (Civ. 1re, 8 juillet 2010, n° 09-67.013, D. 2010. 2884, obs. X. Delpech, note M. Audit et O. Cuperlier ; ibid. 2540, obs. Centre de droit de la concurrence Yves Serra ; ibid. 2933, obs. T. Clay ; Rev. crit. DIP 2010. 743, note D. Bureau et H. Muir Watt ; cette Revue 2011. 667, obs. P. Delebecque ; Rev. arb. 2010. 513, note R. Dupeyré)

Le compromis d'arbitrage n'est pas une clause susceptible d'être déclarée abusive

2012

International audience; (Civ. 1re, 25 février 2010, Guichard c/ Association générale de prévoyance militaire vie, D. 2010. 651 ; ibid. 2933, obs. T. Clay ; ibid. 2011. 974, obs. H. Aubry, E. Poillot et N. Sauphanor-Brouillaud ; RTD civ. 2010. 323, obs. B. Fages ; RTD com. 2010. 774, obs. B. Bouloc ; Rev. arb. 2011. 139, note J. El Adhab ; RDC 2010. 886, obs. N. Sauphanor- Brouillaud)

Psoriātiska artrīta pacientu terapijas izvērtējums P.Stradiņa KUS Reimatoloģijas centrā

2016

Tēmas aktualitāte: pēdējos gados zinātniskās literatūras dati norāda par pētījumiem par NLR, PLR, MPV, CRO lietošanu psoriātiskā artrīta (PsA) pacientu slimības aktivitātes un terapijas efektivitātes novērtēšanā (Kim D.S. et all 2015), (Fu H. et all 2015), (Kisacik B. et all 2008), (Yazici S. et all 2010). Pētījuma mērķis: Izvērtēt PsA pacientu CRO, EGĀ, NLR, PLR un MPV rādītāju noteikšanas nepieciešamību ārstēšanas laikā. Metodes un materiāli: Pētījums izstrādāts P. Stradiņa KUS Reimatoloģijas centrā. Pētījumā iekļauti 39 pacienti, kuriem bija diagnosticēts PsA. PsA pacienti tika sadalīti divās grupās – pēc slimošanas ilguma, un pēc saņemtās terapijas. Šo grupu ietvaros analizējām CRO, EGĀ…

BOTANICAL CONTRIBUTION TO ARCHAEOLOGICAL LAND EVALUATION IN THE FP7 MEMOLA PROJECT

2014

Assessing Hydrus-2D model to investigate the effects of different on-farm irrigation strategies on potato crop under subsurface drip irrigation

2019

The objective of this paper was to assess the performance of Hydrus-2D model to simulate the effects of different on-farm irrigation strategies applied on potato crop. The ability of the model to simulate the stress coefficient (Ks), obtained as the ratio between actual and maximum transpiration, and to define the productive function of potato crop under the semi-arid conditions of central Tunisia were also evaluated. Experiments were carried out on potato crop under full (FI) and deficit irrigation (DI) and two different water qualities supplied by means of a subsurface drip irrigation system. Results evidenced that the model, despite some discrepancies locally observed, can fairly accurat…

Ultrasound-assisted sequential extraction method for the evaluation of mobility of toxic elements in contaminated soils

2005

A method for the fast sequential extraction of toxic elements in contaminated soil samples using an ultrasonic water bath, followed by determination with inductively coupled plasma optical emission spectrometry (ICP-OES), was developed and compared with other methods introduced in the literature. The five-step sequential extraction (Tessier scheme) was shortened using ultrasound-assisted sequential extraction (UASE). The optimization of the five-step sequential extraction was based on the analysis of SRM 2710 using Tessiers’s method as a reference. Several extracting solutions with different sonication times and temperatures were tested in the optimization procedure. Concentrations of arsen…

Sorption of thallium(I) ions by peat.

2013

The increasing industrial use of thallium has raised the need for removal of this highly toxic element from wastewater. Thallium is more toxic than cadmium, copper, zinc, lead and mercury and as it is easily accumulated in humans, animals and plants, it poses a threat to both the environment and human health. Peat has been used as an effective, relatively cheap and easily available sorbent to treat waters containing heavy metals. In this study, peat was characterized and used as sorbent for the removal of Tl(I) ions from aqueous solution. The effect of initial Tl(I) concentration, pH, contact time, temperature and ionic strength was studied in batch mode. The maximum sorption capacity of pe…

Mineralogy and geochemistry of Terra Rossa soils, western Sicily: insights into heavy metal fractionation and mobility

1996

Abstract The distribution of heavy metals in typical Terra Rossa soils and their partitioning in specific soil phases are estimated on the basis of the comparative evaluation of bulk contents, results from sequential chemical extraction procedure (SEP) and scanning electron microscopy/energy dispersive X-ray analysis ( SEM EDX ). A general natural enrichment of heavy metals with respect to average soil is observed. Cadmium proves to be remarkably high (up to 2.4 ppm). Large amounts of Fe, Cr, Cu, Ni, Pb, and Zn occur in the ‘residual’ fraction. The results indicate selective accumulation of the heavy metals in Fe oxides, present as hematite, goethite and maghemite. There is good evidence th…