Is the polychaete, Perinereis rullieri (Pilato 1974), a reliable indicator of PCB and PAH contaminants in coastal sediments?
ABSTRACT A field survey in a transitional environment (lagoon of Venice, Italy) and a laboratory exposure experiment were carried out to validate the use of polychaetes, Perinereis rullieri, as indicators of PCB and PAH contaminants in the sediments. Results from the field study showed that PCBs, predominantly the hexa- and hepta-chlorinated biphenyls, were promptly bioaccumulated in the tissues of P. rullieri, whereas PAH levels were generally low and fluctuating among seasons.Organisms experimentally exposed to natural polluted sediments bioaccumulated all the examined PCB congeners, whereas those exposed to the reference sediments were able to reduce them, at least to some extent. A PAH depletion was always observed, although the time variations for the single compounds differed from each other.The biomarker malondialdehyde (MDA), evaluated both in native and in treated organisms, was helpful as a supporting parameter in elucidating their oxidative stress condition, although depending on numerous natural confounding factors.
Full-textDOI: · Available from: Luisa Da Ros, Mar 04, 2015
SourceAvailable from: Angelo Malachias[Show abstract] [Hide abstract]
ABSTRACT: The present study investigated the effect of the 6-monodeoxy-6-monoamine-β-cyclodextrin(Am-β-CD)/DNA (Am-β-CD/DNA) complex, as well as of culture medium components and proteins, at pH 7.4 and 5.0, on membranes of anionic and pH-sensitive liposomes comprised of DOPE–CHEMS, using energy dispersive X-ray diffraction (EDXD). At pH 7.4, the Am-β-CD/DNA complex induced the appearance of lamellar and hexagonal phases of DOPE. However, at pH 5.0, only non-lamellar phases could be observed. The presence of biological components led to a disruption of lipid order, but the pH-sensitivity of liposomes was maintained.Chemical Physics Letters 04/2011; 506(1):66-70. DOI:10.1016/j.cplett.2011.02.050 · 1.99 Impact Factor
American journal of men's health 01/2010; 7(3):307-307. · 1.15 Impact Factor
Chapter: Assessing Biological Effects01/2014: pages 131-175; Springer.