Polycyclic aromatic hydrocarbons in sediments and mussels of Corral Bay, south central Chile

2004 ◽  
Vol 6 (3) ◽  
pp. 229 ◽  
Author(s):  
Hern�n Palma-Fleming ◽  
Adalberto J. Asencio P. ◽  
Elena Gutierrez
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Central Chile ◽  
South Central ◽  
Polycyclic Aromatic

Sources of polycyclic aromatic hydrocarbons (PAHs) in sediments of the Biobio River in south central Chile

2008 ◽  
Vol 7 (2) ◽  
pp. 133-139 ◽  
Author(s):  
Ricardo Barra ◽  
Roberto Quiroz ◽  
Katia Saez ◽  
Alberto Araneda ◽  
Roberto Urrutia ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Central Chile ◽  
South Central ◽  
Polycyclic Aromatic

Levels and spatial distribution of polycyclic aromatic hydrocarbons (PAHs) in sediments from Lenga Estuary, central Chile

2011 ◽  
Vol 62 (7) ◽  
pp. 1572-1576 ◽  
Author(s):  
Karla Pozo ◽  
Guido Perra ◽  
Valentina Menchi ◽  
Roberto Urrutia ◽  
Oscar Parra ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Central Chile ◽  
Polycyclic Aromatic

scholarly journals Assessment of the independent and combined effects of copper and polycyclic aromatic hydrocarbons on gametogenesis and sporophyte development of the kelp Lessonia spicata (Phaeophyceae, Ochrophyta)

2021 ◽  
Author(s):  
Camila Espinoza-González ◽  
Andrés Meynard ◽  
Alejandra Núñez ◽  
Francisco Castañeda ◽  
Carolina Oyarzo-Miranda ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Exposure Period ◽  
International Standards ◽  
In Vitro Cultivation ◽  
Combined Effects ◽  
Central Chile ◽  
Polycyclic Aromatic ◽  
Sporophyte Development

AbstractCoastal shores near the industrial park of Quintero Bay in central Chile exhibit increasing concentrations of copper (Cu) and polycyclic aromatic hydrocarbons (PAHs), well above international standards. This raises concern about their combined toxic effects on early development stages of kelps. Accordingly, we aimed to assess more accurately the independent and combined effects of Cu and PAHs on gametogenesis and sporophyte development in the kelp Lessonia spicata from central Chile by in vitro cultivation. Independent Cu and PAH trials were performed using increasing nominal concentrations of Cu and PAHs in the ranges 0.8–200 µg L−1 and 0.05–100 µg L−1, respectively. Cu and PAH median effective concentrations (EC50) on gametogenesis and early sporophyte formation were calculated using DRC in the R environment. Then, combined EC50 Cu + PAH trials were conducted to determine their effects on gametogenesis and sporophyte formation. Cu EC50 values on gametogenesis and sporophyte formation were up to three orders of magnitude lower than EC50 reported previously on spore germination in kelps. The gametogenesis (EC50 = 1.39 µg L−1) was more sensitive to Cu than sporophyte formation (EC50 = 11 µg L−1). Inversely, sporophyte formation (EC50 = 0.04 µg L−1) was more sensitive to PAHs (EC50 = 0.11 µg L−1). Considering the entire exposure period, the combined EC50 Cu + PAH exposure was the most harmful and rapid for L. spicata microscopic stages, especially the synergistic effect on early sporophytes. This highlights the need to acquire an integrated knowledge of the seasonal variation of pollutants and their combination on highly intervened coasts.

The Assessment of Contamination and Source of Polycyclic Aromatic Hydrocarbons from the Sediments of the Someş River

2019 ◽  
Vol 64 (1) ◽  
pp. 55-67
Author(s):  
Vlad Pӑnescu ◽  
◽  
Mihaela Cӑtӑlina Herghelegiu ◽  
Sorin Pop ◽  
Mircea Anton ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic

1,1’-Biaceanthrylene and 2,2'-Biaceanthrylene: Models for Linking Larger Polycyclic Aromatic Hydrocarbons via Five-Membered Rings

2019 ◽  
Author(s):  
Yachu Du ◽  
Kyle Plunkett
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Electronic Properties ◽  
Aromatic Hydrocarbons ◽  
Model Systems ◽  
Redox Potentials ◽  
Dimer Model ◽  
Optical And Electronic Properties ◽  
Polycyclic Aromatic

We show that polycyclic aromatic hydrocarbon (PAH) chromophores that are linked between two five-membered rings can access planarized structures with reduced optical gaps and redox potentials. Two aceanthrylene chromophores were connected into dimer model systems with the chromophores either projected outward (2,2’-biaceanthrylene) or inward (1,1’-biaceanthrylene) and the optical and electronic properties were compared. Only the planar 2,2’-biaceanthrylene system showed significant reductions of the optical gaps (1 eV) and redox potentials in relation to the aceanthrylene monomer.<br>

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