Search results for " Community"

Genetic potential, diversity and activity of an atrazine-degrading community enriched from a herbicide factory effluent

2008

Aims:  To characterize an atrazine-degrading bacterial community enriched from the wastewater of a herbicide factory. Methods and Results:  The community mineralized 81·4 ± 1·9% of [14C-ring]atrazine and 31·0 ± 1·8% of [14C-ethyl]atrazine within 6 days of batch cultivation in mineral salts medium containing atrazine as the sole nitrogen source. Degradation activity of the community towards different chloro- and methylthio-substituted s-triazine compounds was also demonstrated. Restriction analysis of amplified 16S rDNA revealed high diversity of bacterial populations forming the community, with Pseudomonas species dominating in the clone library. Atrazine-degrading genetic potential of the …

Spatial and temporal dynamics of bacterioplankton community composition in a subtropical dammed karst river of southwestern China.

2018

Abstract River damming influences the hydro‐physicochemical variations in karst water; however, such disruption in bacterioplankton communities has seldom been studied. Here, three sampling sites (city‐river section, reservoir area, and outflow area) of the Ca2+–Mg2+–HCO 3 −–SO 4 2− water type in the dammed Liu River were selected to investigate the bacterioplankton community composition as identified by high‐throughput 16S rRNA gene sequencing. In the dammed Liu River, thermal regimes have been altered, which has resulted in considerable spatial‐temporal differences in total dissolved solids (TDSs), oxidation‐reduction potential (Eh), dissolved oxygen (DO), and pH and in a different microe…

Molecular analysis of the catechol-degrading bacterial community in a coal wasteland heavily contaminated with PAHs

2010

International audience; A PCR-based molecular tool was developed to estimate the diversity of the catechol-degrading bacterial community in a coal wasteland heavily contaminated with PAHS. A degenerate primer pair specific to catA sequences was designed by multiple alignment of known sequences coding a key intermediate of the β-ketoadiapate pathway degrading catechol, namely catechol 1,2-dioxygenase. The specificity of this primer pair was assessed in 21 pure strains by PCR and sequencing. Comparison of the 16S rDNA and catA phylogenies revealed an absence of congruence between these two genes. The primer set was able to amplify catA sequences in DNA extracts from an industrial soil highly …

Integrating Decomposers, Methane-Cycling Microbes and Ecosystem Carbon Fluxes Along a Peatland Successional Gradient in a Land Uplift Region

2021

AbstractPeatlands are carbon dioxide (CO2) sinks that, in parallel, release methane (CH4). The peatland carbon (C) balance depends on the interplay of decomposer and CH4-cycling microbes, vegetation, and environmental conditions. These interactions are susceptible to the changes that occur along a successional gradient from vascular plant-dominated systems to Sphagnum moss-dominated systems. Changes similar to this succession are predicted to occur from climate change. Here, we investigated how microbial and plant communities are interlinked with each other and with ecosystem C cycling along a successional gradient on a boreal land uplift coast. The gradient ranged from shoreline to meadows…

BioTIME: A database of biodiversity time series for the Anthropocene

2018

Abstract Motivation The BioTIME database contains raw data on species identities and abundances in ecological assemblages through time. These data enable users to calculate temporal trends in biodiversity within and amongst assemblages using a broad range of metrics. BioTIME is being developed as a community-led open-source database of biodiversity time series. Our goal is to accelerate and facilitate quantitative analysis of temporal patterns of biodiversity in the Anthropocene. Main types of variables included The database contains 8,777,413 species abundance records, from assemblages consistently sampled for a minimum of 2 years, which need not necessarily be consecutive. In addition, th…

Italian Sign Language and Spoken Italian in contact: an analysis of interactions between Deaf Parents and Hearing Children

1999

This study explores the outcome of the contact between sign language and spoken italian

Una prospettiva storica e pedagogica sulle Lingue dei Segni: riflessioni psicolinguistiche

2021

Da oltre 50 anni, da quando W. Stokoe negli anni '60 individuò in USA i parametri di articolazione delle lingue dei Segni (cfr. Stokoe, 1981), si assiste ad un sempre maggiore interesse nei confronti delle lingue visivo-gestuali delle comunità di sordi, grazie anche agli sviluppi nel campo della psicolinguistica, delle neuroscienze, e delle nuove tecnologie che consentono indagini sul linguaggio e sul funzionamento cerebrale impensabili sino a qualche tempo fa. Può forse sorprendere che, in una prospettiva storica, all'interno del dibattito linguistico-filosofico si può riscontrare un analogo interesse per i sordi e le loro forme di comunicazione soltanto nella seconda metà del sec. XVIII e…

Heritage and knowledge: apparatus, logic and strategies in the formation of heritage

2016

Heritage as a category reflects diverse political positions. All heritagisation processes imply the creation of hierarchies, selection, ranking, and categorization of what is worthy or unworthy of being heritage, and all heritage creation involves certain disciplinary processes that confer legitimacy. As a modern invention, heritage was built on two closely-related cornerstones: the distinction between nature and culture and the difference between normalized knowledge and marginal knowledge. As a result, refining processes were applied which became strategies to legitimise political domination. In this paper the constituent process of heritage creation and its links to normative knowledge a…

2019

Abstract This study addresses the crucial relationship between theory and practice as a key feature of professional learning in initial teacher education. The context for the study is an EU-funded intensive programme drawing on different dimensions of insideness and outsideness and arts-based pedagogies in response to the diversity of education today. The data for the study comes from self-selected pages from preservice teacher participants’ reflective sketchbooks. As a methodological approach that unifies the sensuous and cognitive this study suggests that reflective sketchbooks document the dialogic encounters of students whilst also providing a material space that can itself become a for…

Libertà di circolazione, divieto di discriminazioni fondate sulla nazionalità e norme sportive sulla cittadinanza

2018

This paper investigates the right of movement and residence of persons in the European Community and the prohibition of discrimination based on nationality, also in the framework of the relations between community law and sports law. In this perspective, after preliminary analysis of the european and domestic rules referred to the above mentioned right of movement, attention will be held to the important topic of Welfare tourism. The investigation proceeds with the examination of the “Sporting Exception” which allows that european rules on right of movement and prohibition of discrimination based on nationality yeld before the international and State’s sport technical rules.