Search results for "COPP"
showing 10 items of 3147 documents
Contamination of soil by copper affects the dynamics, diversity, and activity of soil bacterial communities involved in wheat decomposition and carbo…
2009
ABSTRACT A soil microcosm experiment was conducted to evaluate the influence of copper contamination on the dynamics and diversity of bacterial communities actively involved in wheat residue decomposition. In the presence of copper, a higher level of CO 2 release was observed, which did not arise from greater wheat decomposition but from a higher level of stimulation of soil organic matter mineralization (known as the priming effect). Such functional modifications may be related to significant modifications in the diversity of active bacterial populations characterized using the DNA stable-isotope probing approach.
Differential copper impact on density, diversity and resistance of adapted culturable bacterial populations according to soil organic status
2010
International audience; The effect of copper on the abundance, diversity and resistance of viable heterotrophic and copper resistant bacterial populations (CuR) was evaluated in soils differing only by their amount and type of organic matter. These soils have been obtained using a vineyard soil that had been subjected to three different organic matter managements (Not Amended (NA) or amended with Straw (S) or Conifer Compost (CC)) in a long term field experiment. Soil microcosms were artificially contaminated with copper (250 mg Cu kg−1 of soil) and incubated for 35 days. Throughout the incubation, a differential copper impact on viable heterotrophic and CuR bacterial enumeration was demons…
The dynamics of soil bacterial community structure in response to yearly repeated agricultural copper treatments
2008
International audience; The annual dynamics of soil bacterial community structure, including early, dose-dependent and transient modifications, was observed consecutively at different levels of copper contamination (high: 48 kg Cu ha−1, low: 16 kg Cu ha−1) repeated yearly over a three-year field experiment. Repeated low-level Cu contamination led to an increase in community stability to metal stress without a long-term shift in the population structure, whereas repeated high-level Cu contamination induced a novel and stable bacterial community structure. Furthermore, field experimentation highlighted that episodic climatic stress can modulate copper impact by enhancing community stability.
Influence of hydrogen cations on kinetics and equilibria of heavy-metal sorption by algae-sorption of copper cations by the alga
2012
The influence of hydrogen cations on kinetics and equilibria of sorption of copper cations by the marine alga Palmaria palmata (Linnaeus) Weber & Mohr was studied under static conditions. The competitive effect of the H+ cations is described, which influenced the uncertainty of evaluation of the alga sorption capacity. Under static conditions, the variation of the Cu2+/H+ concentration ratio during sorption was found nonmonotonic. The Langmuir isotherm model was used to determine the sorption capacity of the alga, namely 12.4 mg g−1 of dry algae mass. A similar value was determined from the kinetic parameters of the ionic exchange which is considered a pseudo-second-order chemical reaction.…
The southernmost beech (Fagus sylvatica) forests of Europe (Mount Etna, Italy): ecology, structural stand-type diversity and management implications
2013
The southernmost European beech forests are located in the upper forest vegetation belt on Mount Etna volcano. Their standstructural patterns were analysed to assess the effects of the site-ecological factors and previous management practices on the forest structure. Five main structural-silvicultural types were identified among the main beech forest types: coppice, highmountain coppice (HMCo), high forest, coppice in conversion to high-forest and non-formal stand. A detailed standstructural analysis was carried out through measured dendrometric parameters and derived structural characters linked to both the horizontal and the vertical profiles. Plant regeneration processes were also assess…
CCDC 1422372: Experimental Crystal Structure Determination
2016
Related Article: Sarah Keller, Antonio Pertegás, Giulia Longo, Laura Martínez, Jesús Cerdá, José M. Junquera-Hernández, Alessandro Prescimone, Edwin C. Constable, Catherine E. Housecroft, Enrique Ortí, Henk J. Bolink|2016|J.Mater.Chem.C|4|3857|doi:10.1039/C5TC03725E
CCDC 2081394: Experimental Crystal Structure Determination
2021
Related Article: Marco Meyer, Lorenzo Mardegan, Daniel Tordera, Alessandro Prescimone, Michele Sessolo, Henk J. Bolink, Edwin C. Constable, Catherine E. Housecroft|2021|Dalton Trans.|50|17920|doi:10.1039/D1DT03239A
CCDC 1581155: Experimental Crystal Structure Determination
2018
Related Article: Sarah Keller, Fabian Brunner, José M. Junquera‐Hernández, Antonio Pertegás, Maria‐Grazia La‐Placa, Alessandro Prescimone, Edwin C. Constable, Henk J. Bolink, Enrique Ortí, Catherine E. Housecroft|2018|ChemPlusChem|83|217|doi:10.1002/cplu.201700501
CCDC 1407214: Experimental Crystal Structure Determination
2016
Related Article: Alejandro Pascual-Álvarez, Tamara Topala, Francisco Estevan, Francisca Sanz and Gloria Alzuet-Piña|2016|Eur.J.Inorg.Chem.||982|doi:10.1002/ejic.201501469
CCDC 802648: Experimental Crystal Structure Determination
2011
Related Article: R.D.Costa, D.Tordera, E.Orti, H.J.Bolink, J.Schonle, S.Graber, C.E.Housecroft, E.C.Constable, J.A.Zampese|2011|J.Mater.Chem.|21|16108|doi:10.1039/c1jm12607e