{"refrec":{"BRefID":261920,"RR":"<b>Barradas, C.; Pèqueux, A.</b> (1996). Uptake of mercury by the gills of the fresh water Chinese crab <i>Eriocheir sinensis</i> (Milne-Edwards). <i>Comp. Biochem. Physiol. C-Toxicol. Pharmacol. 113(2)</i>: 157-160. <a href=\"https://dx.doi.org/10.1016/0742-8413(95)02082-9\" target=\"_blank\">https://dx.doi.org/10.1016/0742-8413(95)02082-9</a>","BEntID":253938,"PublicFlag":1,"CheckedFlag":1,"wosflag":0,"vabbflag":0,"RefStringPartII":". <i>Comp. Biochem. Physiol. C-Toxicol. Pharmacol. 113(2)</i>: 157-160. <a href=\"https://dx.doi.org/10.1016/0742-8413(95)02082-9\" target=\"_blank\">https://dx.doi.org/10.1016/0742-8413(95)02082-9</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Barradas, C.; Pèqueux, A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Barradas, C.; Pèqueux, A.","Englishabstract":"An <i>in vitro</i> perfused preparation of gills isolated from the euryhaline Chinese crab <i>Eriocheir sinensis</i> has been used to investigate the uptake of mercury. The results show that mercury crosses the epithelio-cuticular complex of the anterior respiratory gills and of the posterior salt-transporting gills. Mercury passes down its concentration gradient and it may reasonably be concluded that the heavy metal enters the crab <i>via</i> diffusion. However, the mercury influx through the epithelio-cuticular complex is significantly increased when the concentration gradient of mercury is nullified by the addition of mercury to the internal perfusion medium. A mechanism such as exchange-diffusion could then be involved in the transepithelial movements of mercury in crab gills, but this remains a matter of speculation. It is also demonstrated that the metabolic inhibitor 2,4-dinitrophenol, applied in the perfusion medium, drastically and immediately inhibits the influx of mercury through the anterior gills, substantiating the idea that a mechanism requiring metabolic energy is involved in the transepithelial movements of mercury. 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