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- W2367403724 abstract "Objective To study the effects of lanthanum and cadmium in combination on growth rate and antioxidases of Daphnia pulex. Methods The D. Pulex were randomly divided into control group(double distilled water) and low(1/8 LC50,0.012 5 mg/L),moderate(1/4 LC50,0.025 mg/L),high(1/2 LC50,0.05 mg/L) cadmium exposure group and low,moderate, high cadmium+lanthanum exposure group(the ratio of La3+to Cd2+was 1∶1). The growth rate of D. pulex was determined at the 2nd,3rd,5th and 7th day. The activities of T-SOD and CAT were determined at the 12th, 24th, 48th and 72th hour respectively. Results The growth rate of D. pulex increased in 0.012 5 mg/L cadmium exposure group at the 2nd day after exposure and decreased significantly in 0.025 and 0.05 mg/L cadmium exposure group during the 2nd-7th day of exposure compared with the control group(P0.05); The growth rates of D. pulex increased in different degrees in 0.012 5 and 0.025 mg/L cadmium+lanthanum exposure group and decreased in 0.05 mg/L cadmium+lanthanum exposure group compared with the corresponding cadmium exposure group(P0.05). The T-SOD and CAT activities of D. pulex increased in 0.012 5 and 0.025 mg/L cadmium exposure group in different degrees and decreased in 0.05 mg/L cadmium exposure group compared with the control group(P0.05); The T-SOD and CAT activities increased in 0.012 5 and 0.025 mg/L cadmium+lanthanum exposure groups compared with the corresponding cadmium exposure groups(P 0.05). The CAT activities in 0.05 mg/L cadmium + lanthanum exposure group increased after 12 h-exposure, decreased after 48-72 h-exposure, and was still lower compared with the control group. Conclusion Lanthanum no more than 0.025 mg/L may enhance the antioxidases activities and the growth rate of D. pulex,reduce the stress from the same concentration of cadmium, while lanthanum of 0.05 mg/L not reduce the stress from the same concentration of cadmium." @default.
- W2367403724 created "2016-06-24" @default.
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- W2367403724 date "2013-01-01" @default.
- W2367403724 modified "2023-09-27" @default.
- W2367403724 title "Joint effects of lanthanum and cadmium on growth and antioxidases of Daphnia pulex" @default.
- W2367403724 hasPublicationYear "2013" @default.
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