Search results for " natural environment"
showing 6 items of 6 documents
Crude oil exposures reveal roles for intracellular calcium cycling in haddock craniofacial and cardiac development.
2016
AbstractRecent studies have shown that crude oil exposure affects cardiac development in fish by disrupting excitation-contraction (EC) coupling. We previously found that eggs of Atlantic haddock (Melanogrammus aeglefinus) bind dispersed oil droplets, potentially leading to more profound toxic effects from uptake of polycyclic aromatic hydrocarbons (PAHs). Using lower concentrations of dispersed crude oil (0.7–7 μg/L ∑PAH), here we exposed a broader range of developmental stages over both short and prolonged durations. We quantified effects on cardiac function and morphogenesis, characterized novel craniofacial defects, and examined the expression of genes encoding potential targets underly…
«I molteplici casi della sorte». Disastri della guerra e della natura in Tucidide
2018
Il capitolo 23 del primo libro di Tucidide conclude il proemio e ricapitola gli elementi chiave della visione storiografica dello storico ateniese. Sopo aver connesso il primato della guerra alla sua durata e ad un impressionante elenco di sofferenze (pathemata) Tucidide aggiunge un secondo elenco di disastri naturali (terremoti, eclissi, la peste). Questo contributo si propone di indagare il rapporto tra le due serie di disastri nel quadro della più ampia visione tucididea sulla guerra e sulla condotta umana. Accostando ai pathemata l’elenco dei disastri naturali, lungi dal volere individuare nella straordinaria sovversione dell’ambiente naturale un effetto delle decisioni umane o un annun…
New insights into the surface functionalities and adsorption evolution of water molecules on silica gel surface: A study by second derivative near in…
2010
Accepted version of an article in the journal: Vibrational Spectroscopy. Published version available on Science Direct: http://dx.doi.org/10.1016/j.vibspec.2010.06.003 Surface functionalities and adsorption evolution of water molecules on silica gel samples were studied by second derivative near infrared spectroscopy. Four different silica gel samples with varying surface area were used in this experiment. Each of the dry samples was allowed to equilibrate with surrounding air and the near infrared spectra were accumulated at different time intervals using reflectance technique. The evolved spectra were analysed using second derivative technique to study the adsorption evolution of water mo…
The Fate of Phthalates in Surface Waters During Humus Removal by Precipitation
2010
Published version of an article from the journal:International Journal of Arts and Sciences. Also available from the publisher:http://www.openaccesslibrary.org/images/XEW117_Alfred_A._Christy_I_.pdf. Open Access Phthalates are esters of aromatic 1,2 di-carboxylic acids and are widely found in surface waters and their removal is necessary because of their effects on human health. Humic material in water can adsorb phthalates and may be precipitated along with phthalates. The fate of phthalates in surface waters during humus removal by precipitation has been investigated in the laboratory with well characterised humic substances from the ?NOM typing project? (Natural Organic Matter typing pro…
Water Chemistry in the Confluence Zone Downstream a Limestone Treated Lake and an Acid Tributary: Principal Component Analyses Including Warm and Col…
2010
Published version of an article from the journal:International Journal of Arts and Sciences. Also available from the publisher: http://www.openaccesslibrary.org/images/XEW244_Alfred_A._Christy_II_.pdf. Open Access Extensive limestone treatment of lakes and watercourses has been carried out especially in Norway and Sweden to counteract effects of acidification. Lakes have been the most commonly treated part of the water systems. However, treatment of lakes upstream acid tributaries may introduce downstream toxic mixing zones for fish. To sort this out the outlet of a treated lake, a downstream acid tributary and two sites in the confluence zone were intensely monitored during a period of 28 …
Krimināllikuma 102. panta piemērošana ūdens piesārņojuma novēršanai: praktiskās problēmas
2015
Krimināllikuma 102.pants paredz kriminālatbildību par noziedzīgiem nodarījumiem pret dabas vidi, taču praksē nākas saskarties ar problēmām noziedzīga nodarījuma sastāva kvalifikācijā. Vainīgās personas netiek sauktas pie kriminālatbildības, kā arī nav iespējams pierādīt personas vainu izdarītajā nodarījumā. Darbā tiek izstrādāti priekšlikumi likumdošanas pilnveidei ar mērķi izstrādāt vienotus kritērijus pēc kuriem būtu iespējams noteikt un paredzēt kaitīgo seku iestāšanos saistībā ar ūdens piesārņojumu, novēršot gadījumus, kad vainīgās personas netiek sauktas pie kriminālatbildības, jo nav iespējams konstatēt noziedzīga nodarījuma sastāvu. Atslēgvārdi: Krimināllikuma 102.pants; noziedzīgi n…