Objective To investigate whether acute dipterex poisoning (ADP) may cause oxidative stress and free radical damage in the bodies of acute dipterex poisoning patients (ADPPs), and to explore the mechanisms by which ADP...Objective To investigate whether acute dipterex poisoning (ADP) may cause oxidative stress and free radical damage in the bodies of acute dipterex poisoning patients (ADPPs), and to explore the mechanisms by which ADP may cause oxidative stress and free radical damage. Methods Fifty ADPPs and fifty healthy adult volunteers (HAVs) whose ages, gender and others were matched with the ADPPs were enrolled in a randomized controlled study, in which concentrations of nitric oxide (NO), vitamin C (VC), vitamin E (VE) and P-carotene (P-CAR) in plasma as well as concentration of lipoperoxide (LPO), and activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX) and acetylcholinesterase (AChE) in erythrocytes were determined by spectrophotometric analytical methods. Results Compared with the average values of experimental parameters in the HAVs group, the average values of plasma NO and erythrocyte LPO in the ADPPs group were significantly increased (P<0.0001), while those of plasma VC, VE and P-CAR as well as erythrocyte SOD, CAT, GPX and AChE in the ADPPs group were significantly decreased (P<0.0001). Bivariate correlation analysis and partial correlation analysis suggested that when NO and LPO values were increased, and VC, VE, β-CAR, SOD, CAT and GPX values were decreased in the ADPPs, AChE value was decreased gradually in the ADPPs (P<0.001-0.0001). Reliability analysis of experimental parameters reflecting oxidative stress and free radical damage in the ADPPs showed that the reliability coefficient (8 items) alpha=0.6909, and the standardized item alpha=0.8574. Conclusion The findings in the present study suggest that ADP can cause oxidative stress and free radical damage, and inhibit markedly erythrocyte acetylcholinesterase activity in ADPPs.展开更多
A TiO2 thin film electrode deposited on porous nickel net （TiO2/Ni） was prepared by the sol-gel method, and the surface morphology, crystal structure features and the grain size were characterized by Field emission ...A TiO2 thin film electrode deposited on porous nickel net （TiO2/Ni） was prepared by the sol-gel method, and the surface morphology, crystal structure features and the grain size were characterized by Field emission scan electron microscopy （FESEM） and X-ray diffraction （XRD）. The photoelectrocatalytic system was set up using a UV high-pressure mercury lamp as the light source, TiO2 coated on foamed nickel as photo anode, Pt sheet as counter electrode and the pesticide dipterex in synthetic wastewater. Various factors that influence the photoelectrocatalytic decomposition of dipterex pesticide have been studied, such as degradation time, the type of electrolyte, current density, original pH value and different degradation methods. The prepared catalysts were employed to photoelectrocatalytically degrade the pesticide dipterex under UV irradiation, comparing the results with photocatalytic degradation and electrochemical oxidation. The results indicated that under the optimal conditions of 0.02 mol/L NaC1 as the supporting electrolyte, current density = 2.5 mA/cm^2, pH 6.0 and dipterex pesticide 40 mg/L, and reaction time 2 hr, dipterex chemical oxygen demand （COD） removal rate and organophosphorous conversion of up to 82.6% and 83.5% were achieved, respectively. The method of photoelectrocatalytic degradation is more efficient than photocatalysis and electrochemical oxidation. The possible roles of the electrolytes on the reactions and probable mechanisms were also discussed.展开更多
研究了5种常用水产药物对白斑狗(Esox Lucius Linnaeus)鱼幼鱼的急性毒性。使用常温静水试验法,探讨了溴氯海因、高锰酸钾、氯化钠、敌百虫和氯氰菊酯5种常用水产药物对白斑狗鱼幼鱼的急性毒性效应,分别在试验24h、48h和96h后记录白斑...研究了5种常用水产药物对白斑狗(Esox Lucius Linnaeus)鱼幼鱼的急性毒性。使用常温静水试验法,探讨了溴氯海因、高锰酸钾、氯化钠、敌百虫和氯氰菊酯5种常用水产药物对白斑狗鱼幼鱼的急性毒性效应,分别在试验24h、48h和96h后记录白斑狗鱼幼鱼的死亡尾数和试验药液的安全质量浓度。结果表明,5种药物的安全浓度分别为1.10mg·L-1、1.37mg·L-1、3309mg·L-1、0.57mg·L-1和0.0080mg·L-1,这5种药物对白斑狗鱼幼鱼毒性依次顺序为氯氰菊酯>敌百虫>溴氯海因>高锰酸钾>氯化钠。展开更多
文摘Objective To investigate whether acute dipterex poisoning (ADP) may cause oxidative stress and free radical damage in the bodies of acute dipterex poisoning patients (ADPPs), and to explore the mechanisms by which ADP may cause oxidative stress and free radical damage. Methods Fifty ADPPs and fifty healthy adult volunteers (HAVs) whose ages, gender and others were matched with the ADPPs were enrolled in a randomized controlled study, in which concentrations of nitric oxide (NO), vitamin C (VC), vitamin E (VE) and P-carotene (P-CAR) in plasma as well as concentration of lipoperoxide (LPO), and activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX) and acetylcholinesterase (AChE) in erythrocytes were determined by spectrophotometric analytical methods. Results Compared with the average values of experimental parameters in the HAVs group, the average values of plasma NO and erythrocyte LPO in the ADPPs group were significantly increased (P<0.0001), while those of plasma VC, VE and P-CAR as well as erythrocyte SOD, CAT, GPX and AChE in the ADPPs group were significantly decreased (P<0.0001). Bivariate correlation analysis and partial correlation analysis suggested that when NO and LPO values were increased, and VC, VE, β-CAR, SOD, CAT and GPX values were decreased in the ADPPs, AChE value was decreased gradually in the ADPPs (P<0.001-0.0001). Reliability analysis of experimental parameters reflecting oxidative stress and free radical damage in the ADPPs showed that the reliability coefficient (8 items) alpha=0.6909, and the standardized item alpha=0.8574. Conclusion The findings in the present study suggest that ADP can cause oxidative stress and free radical damage, and inhibit markedly erythrocyte acetylcholinesterase activity in ADPPs.
基金supported by the National Natural Science Foundation of China (No. 21002018)the Fundamental Research Funds for the Central Universities (No.DL12BB01)
文摘A TiO2 thin film electrode deposited on porous nickel net （TiO2/Ni） was prepared by the sol-gel method, and the surface morphology, crystal structure features and the grain size were characterized by Field emission scan electron microscopy （FESEM） and X-ray diffraction （XRD）. The photoelectrocatalytic system was set up using a UV high-pressure mercury lamp as the light source, TiO2 coated on foamed nickel as photo anode, Pt sheet as counter electrode and the pesticide dipterex in synthetic wastewater. Various factors that influence the photoelectrocatalytic decomposition of dipterex pesticide have been studied, such as degradation time, the type of electrolyte, current density, original pH value and different degradation methods. The prepared catalysts were employed to photoelectrocatalytically degrade the pesticide dipterex under UV irradiation, comparing the results with photocatalytic degradation and electrochemical oxidation. The results indicated that under the optimal conditions of 0.02 mol/L NaC1 as the supporting electrolyte, current density = 2.5 mA/cm^2, pH 6.0 and dipterex pesticide 40 mg/L, and reaction time 2 hr, dipterex chemical oxygen demand （COD） removal rate and organophosphorous conversion of up to 82.6% and 83.5% were achieved, respectively. The method of photoelectrocatalytic degradation is more efficient than photocatalysis and electrochemical oxidation. The possible roles of the electrolytes on the reactions and probable mechanisms were also discussed.
文摘研究了5种常用水产药物对白斑狗(Esox Lucius Linnaeus)鱼幼鱼的急性毒性。使用常温静水试验法,探讨了溴氯海因、高锰酸钾、氯化钠、敌百虫和氯氰菊酯5种常用水产药物对白斑狗鱼幼鱼的急性毒性效应,分别在试验24h、48h和96h后记录白斑狗鱼幼鱼的死亡尾数和试验药液的安全质量浓度。结果表明,5种药物的安全浓度分别为1.10mg·L-1、1.37mg·L-1、3309mg·L-1、0.57mg·L-1和0.0080mg·L-1,这5种药物对白斑狗鱼幼鱼毒性依次顺序为氯氰菊酯>敌百虫>溴氯海因>高锰酸钾>氯化钠。
