PCBs in sediments of the Great Lakes – Distribution and trends, homolog and chlorine patterns, and in situ degradation

International Union of Basic and Clinical Pharmacology. XCIX. Angiotensin Receptors: Interpreters of Pathophysiological Angiotensinergic Stimuli

“…Accumulation of neuropeptides when AngIV binds to IRAP has been suggested as a mechanism for cognitive enhancement. In a recent study it State of the Angiotensin Receptors was shown that the increase of extracellular dopamine concentration and the anticonvulsant effect of AngIV could be inhibited by a somatostatin receptor antagonist administered in the rat striatum (Li et al, 2009a). Accumulation of somatostatin to mediate these effects may be one possible mechanism for the observed phenomenon, although somatostatin cleavage by IRAP was not confirmed.…”

Historically and Currently Used Dechloranes in the Sediments of the Great Lakes

“…South-to-north and east-to-west log-linear decreasing gradients have been reported for PCBs and PBDEs in the sediments of the Great Lakes. 13,17 As shown in Figure 2, the inventory of mirex in sediment is a strong function of the latitude and longitude of the sampling locations. The surface concentration and flux are also dependent on the latitude and longitude but with slightly weaker statistics (SI Table S4).…”

“…The northward EHDs are 125 km, 150 km, and 110 km for PCBs, BDE47, and BDE209, respectively, similarly derived in our previous project but with Lake Ontario included. 13,17 These differences may result from the stronger impact of the single, dominant point source for DP and Dec602 than for the others, as well as the chronological differences in the commencements of manufacturing and use among the chemicals. The finding of this work hints that DP could have a lower long-range transport potential than PCBs and PBDEs, at least within the time period of the past four decades.…”

Historical Changes in Levels of Organic Pollutants in Sediment Cores from Brno Reservoir, Czech Republic

“…A detailed study of the congener pattern, e.g., by comparing PCB of different degree of chlorination, might be a helpful tool to evaluate changes in PCB application or changes in environmental conditions (Li et al 2009). Three predominant congeners in all cores were PCB 138, 153, and 180.…”

“…A great number of papers published during the past decade present valuable data on the pollutant distribution in surface sediments and cores (e.g., Dsikowitzky et al 2002;Yunker et al 2002;Navarro et al 2006;Li et al 2009). In many papers, however, there is a limited analysis of the sedimentological features of the pollutant distribution, which may play a key role in distinguishing among the different sources, transport processes, and state of preservation of the contaminants in the specific environment (Eyre and McConchie 1993;Pereira et al 1999;Lüder et al 2006).…”