This study investigated the effect of a chitosan oligosaccharide-Ca complex (COS-Ca) on the depuration of cadmium (Cd) from Chlamys ferrari. After exposure to 0.5 mg L-1 CdCl2 for 3 or 7 d, the scallops were treated b...This study investigated the effect of a chitosan oligosaccharide-Ca complex (COS-Ca) on the depuration of cadmium (Cd) from Chlamys ferrari. After exposure to 0.5 mg L-1 CdCl2 for 3 or 7 d, the scallops were treated by COS-Ca prior to determina-tion of Cd, calcium (Ca) and zinc (Zn) contents, Cd distribution in organs, malondialdehyde (MDA) content and antioxidant variables. Results showed that COS-Ca reduced Cd content in the viscera of the scallops, with highest Cd depuration rate (47%) observed on day 3. The COS-Ca concentration substantially affected Cd depuration, and the exposure to 8.75 mg L-1 COS-Ca led to significantly higher Cd depuration rate compared with those of lower COS-Ca concentrations (1.75, 3.5, 5.25, and 7.00 mg L-1). Distribution analysis of Cd in scallop organs indicated that COS-Ca significantly reduced Cd content in the kidney throughout the 5-d experiment, as well as in the gill during the early stage of Cd depuration. In addition, COS-Ca treatment decreased glutathione peroxidase (GSH-Px) activity and MDA content while increasing superoxide dismutase (SOD) and catalase (CAT) activities on different days. Our work suggested COS-Ca complex treatment as an effective method for acceleration of Cd depuration from Cd-contaminated bivalves.展开更多
能与世界顶级奢华的Vertu相提并论的品牌并不算多，法拉利是其中的一个。作为庆贺2007年法拉利60周年华诞的贺礼，Vertu特别与法拉利的设计团队密切合作，推出了这款全新的Vertu Ascent Ferrari 1947限量版手机。这款手机的设计灵感源...能与世界顶级奢华的Vertu相提并论的品牌并不算多，法拉利是其中的一个。作为庆贺2007年法拉利60周年华诞的贺礼，Vertu特别与法拉利的设计团队密切合作，推出了这款全新的Vertu Ascent Ferrari 1947限量版手机。这款手机的设计灵感源于法拉利经典的GT顶级跑车，采用了手工抛光的钛金外壳，机身覆盖着与法拉利跑车遥相呼应的红色与黑色真皮，前盖上镌刻着帅气的法拉利跃马标志，展开更多
基金supported by grants of the National Key Technology Research and Development Program in the 11th Five-Year Plan of China (2008BAD94B\09)the National Natural Science Foundation of China (Grant No. 30972289)
文摘This study investigated the effect of a chitosan oligosaccharide-Ca complex (COS-Ca) on the depuration of cadmium (Cd) from Chlamys ferrari. After exposure to 0.5 mg L-1 CdCl2 for 3 or 7 d, the scallops were treated by COS-Ca prior to determina-tion of Cd, calcium (Ca) and zinc (Zn) contents, Cd distribution in organs, malondialdehyde (MDA) content and antioxidant variables. Results showed that COS-Ca reduced Cd content in the viscera of the scallops, with highest Cd depuration rate (47%) observed on day 3. The COS-Ca concentration substantially affected Cd depuration, and the exposure to 8.75 mg L-1 COS-Ca led to significantly higher Cd depuration rate compared with those of lower COS-Ca concentrations (1.75, 3.5, 5.25, and 7.00 mg L-1). Distribution analysis of Cd in scallop organs indicated that COS-Ca significantly reduced Cd content in the kidney throughout the 5-d experiment, as well as in the gill during the early stage of Cd depuration. In addition, COS-Ca treatment decreased glutathione peroxidase (GSH-Px) activity and MDA content while increasing superoxide dismutase (SOD) and catalase (CAT) activities on different days. Our work suggested COS-Ca complex treatment as an effective method for acceleration of Cd depuration from Cd-contaminated bivalves.
文摘能与世界顶级奢华的Vertu相提并论的品牌并不算多，法拉利是其中的一个。作为庆贺2007年法拉利60周年华诞的贺礼，Vertu特别与法拉利的设计团队密切合作，推出了这款全新的Vertu Ascent Ferrari 1947限量版手机。这款手机的设计灵感源于法拉利经典的GT顶级跑车，采用了手工抛光的钛金外壳，机身覆盖着与法拉利跑车遥相呼应的红色与黑色真皮，前盖上镌刻着帅气的法拉利跃马标志，
