本文研究了不同浓度的CuSO_4对55-65代松江鲈肾细胞系的毒性效应。采用MTT法测得CuSO_424 h LC_(50)为154.34μmol/L。酶活力测定的结果显示:超氧化物歧化酶(SOD)和谷胱甘肽-S-转移酶(GST)的活性在CuSO_4浓度为0~300μmol/L时,随浓度的...本文研究了不同浓度的CuSO_4对55-65代松江鲈肾细胞系的毒性效应。采用MTT法测得CuSO_424 h LC_(50)为154.34μmol/L。酶活力测定的结果显示:超氧化物歧化酶(SOD)和谷胱甘肽-S-转移酶(GST)的活性在CuSO_4浓度为0~300μmol/L时,随浓度的升高逐渐升高,在300μmol/L时达到最大值;谷胱甘肽过氧化物酶(GSH-Px)的活性在CuSO_4浓度为100μmol/L时达到最大值,随后随着CuSO_4浓度的降低逐渐降低。微核率随CuSO_4浓度增加而增加,最高达14.33‰,彗星实验发现在半致死浓度条件下松江鲈肾细胞拖尾率为54.00%、迁移长度18.41±2.94μm,与对照组差异显著(p<0.05)。认为CuSO_4会引起细胞氧化酶活性的改变以及细胞核DNA损伤。松江鲈肾细胞系可以作为Cu2+污染的监测指标。展开更多
This paper presents a new method of surface modification on LaNi5 hydr ogen storage alloy. The hydrogen alloy was treated in the acid CuSO4 solution co ntaining HF. The effect of HF on surface state of alloy was studi...This paper presents a new method of surface modification on LaNi5 hydr ogen storage alloy. The hydrogen alloy was treated in the acid CuSO4 solution co ntaining HF. The effect of HF on surface state of alloy was studied and the elec trochemical properties of modified alloy were investigated. Electrochemical impe dance spectra (EIS) was also applied to analyze the resistance property of alloy electrode after modification. SEM and XRD results showed that HF had corrosive effect on hydrogen alloy, which help copper grain to precipitate on alloy surfac e. EIS analysis showed that modified alloy had lower contact resistance and elec trochemical polarization, which resulted in a higher conductivity and electroche mical activation. Electrochemical testing showed modified alloy had better activ ation behavior and excellent large current discharge ability. Thus it could well satisfy the requirement of the application as power sources on electric vehicle s.展开更多
文摘本文研究了不同浓度的CuSO_4对55-65代松江鲈肾细胞系的毒性效应。采用MTT法测得CuSO_424 h LC_(50)为154.34μmol/L。酶活力测定的结果显示:超氧化物歧化酶(SOD)和谷胱甘肽-S-转移酶(GST)的活性在CuSO_4浓度为0~300μmol/L时,随浓度的升高逐渐升高,在300μmol/L时达到最大值;谷胱甘肽过氧化物酶(GSH-Px)的活性在CuSO_4浓度为100μmol/L时达到最大值,随后随着CuSO_4浓度的降低逐渐降低。微核率随CuSO_4浓度增加而增加,最高达14.33‰,彗星实验发现在半致死浓度条件下松江鲈肾细胞拖尾率为54.00%、迁移长度18.41±2.94μm,与对照组差异显著(p<0.05)。认为CuSO_4会引起细胞氧化酶活性的改变以及细胞核DNA损伤。松江鲈肾细胞系可以作为Cu2+污染的监测指标。
文摘This paper presents a new method of surface modification on LaNi5 hydr ogen storage alloy. The hydrogen alloy was treated in the acid CuSO4 solution co ntaining HF. The effect of HF on surface state of alloy was studied and the elec trochemical properties of modified alloy were investigated. Electrochemical impe dance spectra (EIS) was also applied to analyze the resistance property of alloy electrode after modification. SEM and XRD results showed that HF had corrosive effect on hydrogen alloy, which help copper grain to precipitate on alloy surfac e. EIS analysis showed that modified alloy had lower contact resistance and elec trochemical polarization, which resulted in a higher conductivity and electroche mical activation. Electrochemical testing showed modified alloy had better activ ation behavior and excellent large current discharge ability. Thus it could well satisfy the requirement of the application as power sources on electric vehicle s.