为研究青蛤(Cyclina sinensis)对重金属Cu^(2+)的蓄积作用及免疫机能的影响,开展了Cu^(2+)对青蛤的急性毒性实验,观察青蛤在96 h Cu^(2+)半致死浓度和安全浓度胁迫下,不同组织的蓄积趋势,及血淋巴液中SOD、CAT和ACP活性的变化。结果显示...为研究青蛤(Cyclina sinensis)对重金属Cu^(2+)的蓄积作用及免疫机能的影响,开展了Cu^(2+)对青蛤的急性毒性实验,观察青蛤在96 h Cu^(2+)半致死浓度和安全浓度胁迫下,不同组织的蓄积趋势,及血淋巴液中SOD、CAT和ACP活性的变化。结果显示:Cu^(2+)的半致死浓度为0.807 mg/L,安全浓度为0.00807 mg/L。鳃和内脏团组织中蓄积的Cu^(2+)浓度与处理时间呈正相关;在半致死和安全浓度胁迫下,鳃组织中Cu^(2+)蓄积速度均快于内脏团;在半致死浓度胁迫下血淋巴液中SOD、CAT和ACP活性呈现先诱导再抑制的趋势,安全浓度下无明显变化,但均高于对照组水平。展开更多
I am twelve years old. I'm in No. 2 middle school. I have very great desire. That is I want to study in No.1 Senior Middle School, because it's a very famous school. It may be a dream for me, for I am not a to...I am twelve years old. I'm in No. 2 middle school. I have very great desire. That is I want to study in No.1 Senior Middle School, because it's a very famous school. It may be a dream for me, for I am not a top student, but I will study hard from now on and make the dream come true. When I am not a student any longer, I want to become an artist. I like drawing very much and I展开更多
文摘I am twelve years old. I'm in No. 2 middle school. I have very great desire. That is I want to study in No.1 Senior Middle School, because it's a very famous school. It may be a dream for me, for I am not a top student, but I will study hard from now on and make the dream come true. When I am not a student any longer, I want to become an artist. I like drawing very much and I
