Search results for "POLLUTION"
showing 10 items of 2765 documents
Temporal dynamic of biofilms enhances the settlement of the central-Mediterranean reef-builder Dendropoma cristatum (Biondi, 1859).
2021
Abstract Research on marine invertebrate settlement provides baseline knowledge for restoration technique implementation, especially for biogenic engineers with limited dispersion ability. Previously, we determined that the maturity of a biofilm strongly enhances the settlement of the vermetid reef-builder Dendropoma cristatum. To elucidate settlement-related biofilm features, here we analyse the structure and composition of marine biofilms over time, through microscopic observations, eukaryotic and prokaryotic fingerprinting analyses and 16S rDNA Illumina sequencing. The vermetid settlement temporal increase matched with the higher biofilm coverage on the substratum and the reduction of th…
2019
Abstract. The cumulative occurrence of heavy precipitation and flood events during recent years in various Central European locations emphasises the urgent need to improve extreme rainfall observations and forecasts. Precipitation gauges based on a weighing system allow the recording of intense short-term precipitation events with a very high temporal resolution (down to 1 min). In this study, observational data that were collected during the period 2000 to 2016 for 126 stations of two corresponding measuring networks in the Central German state of Hesse were investigated for the first time to answer the following questions: (1) Are the recorded high-resolution precipitation data plausible …
Lead concentrations in feathers and blood of common blackbirds (Turdus merula) and in earthworms inhabiting unpolluted and moderately polluted urban …
2006
9 pages; International audience; Despite the dramatic decrease of atmospheric lead (Pb) concentrations in urban areas of most industrialised countries, we hypothesised that urban common blackbirds (Turdus merula) may still be contaminated by Pb concentrations of toxicological concern due to transfer from soil through the food chain. We sampled blackbirds and earthworms, one of their main preys, in Besan?, a middle-size city of Eastern France (where atmospheric Pb concentrations decreased from 0.5 microg/m(3) in 1987 to nearly 0 in 2002) and in a rural reference site. Lead concentrations were determined in the tissues of the different functional groups of earthworms (anecic, epigeous and end…
SARS-CoV-2 RNA in wastewater anticipated COVID-19 occurrence in a low prevalence area
2020
Preprint disponible en http://hdl.handle.net/10261/209125
Profiles and seasonal distribution of airborne fungi in indoor and outdoor environments at a French hospital
2009
International audience; A one-year prospective survey of fungal air contamination was conducted in outdoor air and inside two haematological units of a French hospital. Air was sampled with a portable Air System Impactor. During this period of survey, the mean viable fungal load was 122.1 cfu/m(3) in outdoor air samples, and 4.1 and 3.9 cfu/m(3) in samples from adult and pediatric haematology units, respectively. In outdoor samples, Cladosporium was the dominant genus (55%) while in the clinical units, Penicillium sp. (23 to 25%), Aspergillus sp. (15 to 23%) and Bjerkandera adusta (11 to 13%) were the most frequently recovered airborne fungi. The outdoor fungal load was far higher in autumn…
Occurrence of selected antibiotics and antiretroviral drugs in Nairobi River Basin, Kenya.
2015
In this paper, we investigated the occurrence of three antibiotics (sulfamethoxazole, trimethoprim and ciprofloxacin) and three antiretroviral (lamivudine, nevirapine and zidovudine) drugs in the Nairobi River Basin, Kenya. The analytical procedure involved extraction using solid phase extraction followed by liquid chromatography-electrospray ionization tandem mass spectrometry (SPE-LC-ESI-MS/MS). In this study, 40 sites were selected for sampling, including 38 sites along the rivers and 2 wastewater treatment effluent sites. All the studied compounds were detected with sulfamethoxazole having the highest detection frequency of 97.5% and ciprofloxacin had the lowest at 60%. The results show…
Trokšņa līmeņa novērtējums iekštelpās
2017
Bakalaura darba “Trokšņa līmeņa novērtējums iekštelpās” ietvaros veikti trokšņa līmeņa mērījumi daudzdzīvokļu māju dzīvojamās telpās dažādās Rīgas apkaimēs - Bolderājā, Vecrīgā un Maskavas forštatē. Novērtējums veikts izmantojot tiešo mērījumu metodi ar kalibrētu iekārtu PCE-322A. Iegūtie rezultāti apkopoti izvērtējot diennakts cikliskumu, mainību nedēļas laikā, ārējo faktoru ietekmi, kopā veiktas 8 mērījumu kampaņas. Iegūtie rezultāti liecina par normatīviem atbilstošu akustiskā trokšņa līmeni dzīvojāmo ēku telpās, kas nozīmē, ka tiek nodrošināta cilvēku aizsardzība pret akustiskā trokšņa nelabvēlīgo iedarbību.
Aerosolu piesārņojuma un trokšņa līmeņa novērtējums bērnu rotaļu laukumos Rīgas centrā
2019
Bakalaura darbā “Aerosolu piesārņojuma un trokšņa līmeņa novērtējums bērnu rotaļu laukumos Rīgas centrā” veikts piecu Rīgas centra bērnu laukumu cieto daļiņu gaisa piesārņojuma un trokšņa līmeņa izvērtējums 2019. gada pavasara periodā laika posmā no marta līdz maijam. Pētījuma ietvaros veikti mērījumi ar lāzera optisko daļiņu skaitītāju un trokšņa līmeņa mērierīci. Iegūtie rezultāti liecina, ka ar minētajiem aspektiem saistītā vides kvalitāte Rīgas bērnu laukumos ir apmierinoša, būtu jāstrādā ar trokšņa līmeņa samazināšanu. Atslēgas vārdi: bērnu laukumi, aerosolu gaisa piesārņojums, trokšņa līmenis.
La fabrique de l’éclairage public. De la lumière planifiée aux territorialités nocturnes.
2018
International audience; L’éclairage urbain, s’il a amélioré la qualité de vie dans nos sociétés, n’est pas exempt de coûts écologiques et sanitaires que, depuis une trentaine d’années, plusieurs champs scientifiques relayés par des mouvements associatifs et politiques ont mis en évidence. À telle enseigne qu’en France, suite au Grenelle de l’Environnement, l’éclairage urbain est désormais appréhendé en termes de nuisance, voire de pollution. Ce changement de qualification signe le passage d’une approche fonctionnaliste de l’éclairage public définie par les professionnels élus et non élus de la fabrique de la ville à une approche sociotechnique de l'éclairage qui donne sa place aux usagers d…
The role of natural science collections in the biomonitoring of environmental contaminants in apex predators in support of the EU’s zero pollution am…
2022
Movalli, Paola et al.