使用商品化弗罗里硅土小柱对废水中的Aroclor进行净化。比较了不同极性洗脱溶剂和洗脱体积下弗罗里硅土小柱的净化效果。采用1 g/6 m L的弗罗里硅土小柱净化时,洗脱液体积大于8.0 m L,洗脱完全,未有目标物质被检出。淋洗溶剂的极性改变...使用商品化弗罗里硅土小柱对废水中的Aroclor进行净化。比较了不同极性洗脱溶剂和洗脱体积下弗罗里硅土小柱的净化效果。采用1 g/6 m L的弗罗里硅土小柱净化时,洗脱液体积大于8.0 m L,洗脱完全,未有目标物质被检出。淋洗溶剂的极性改变,对初始洗脱体积(0~3.0 m L)的洗脱效率会产生一定影响。随着极性的增加,目标物的回收率随之增加,但是共流出的干扰物也随之增加。展开更多
Aim: To evaluate the effect of polychlorinated biphenyls (PCB) and vitamin C on ventral prostatic antioxidant system in adult male rats. Methods: A group of 20 adult male rats were administered ip Aroclor 1254 in corn...Aim: To evaluate the effect of polychlorinated biphenyls (PCB) and vitamin C on ventral prostatic antioxidant system in adult male rats. Methods: A group of 20 adult male rats were administered ip Aroclor 1254 in corn oil at a dose of 2 mg·kg-1·day-1 for 30 days. Ten control rats were administered only the vehicle. After 30 days the treated rats were divided at random into 2 sub-groups of 10 animals each. One sub-group received vitamin C at a dose of 500 mg·kg-1·day-1 for 10 days. The other group was maintained as Aroclor 1254 control. Twenty-four hours after the last treatment the rats were killed by decapitation. Ventral prostatic homogenate was prepared and used for the estimation of enzymatic antioxidants, including superoxide dismutase (SOD), catalase (CAT) and glutathione-S-transferase (GST) and hydrogen peroxide (H2O2), lipid peroxidation (LPO) and prostatic acid phosphatase. The serum levels of total T3, total T4, TSH, testosterone and estradiol were also assayed. Results: The body weight and ventral prostatic weight were reduced in PCB treated rats. The activities of SOD, CAT, GST and acid phosphatase were decreased while the levels of H2O2 and lipid peroxidation were increased in the ventral prostate of PCB treated rats. Administration of vitamin C restored these parameters. Serum levels of thyroid hormones, estradiol and testosterone were decreased in PCB treated animals. Administration of vitamin C restored the thyroid hormone levels. Conclusion: PCB induces oxidative stress and decreases the antioxidant enzymes in the ventral prostate of adult male rats; the effects could be reversed by the administration of vitamin C.展开更多
Objective:To evaluate the dose and duration dependent cytotoxicity of aroclor 1254 on mice testis.Methods: The study tests the hypothesis that in vivo exposure of very low dose aroclor 1254, comparable to that of poss...Objective:To evaluate the dose and duration dependent cytotoxicity of aroclor 1254 on mice testis.Methods: The study tests the hypothesis that in vivo exposure of very low dose aroclor 1254, comparable to that of possible human exposure from different environmental sources, will provoke dose and duration dependent histological damage in the mice testis. Male mice were orally administered with the two doses 0.1 and 1 mg/kg b.w /d. of aroclor 1254 for 7, 14, 21 and 28 days.Results:Results showed the degenerative changes in the testis of mice, namely, atrophied seminiferous tubules, expanded space in interstitial and necrosis in the germinal epithelial cells of seminiferous tubules, of the seminiferous tubules and deceleration of spermatogenesis.Conclusions: Therefore, the results of the present study suggested that the sub-acute exposure of very low doses of aroclor 1254, can subsequently mediate the cytoskeleton dysfunction in the testis of mice.展开更多
To assess the neurotoxic effects and redoxresponses of Aroclor 1254 （A1254） on perinatallyexposed rat offspring, A1254 was administered bygavage from gestational day （GD） 6 to postnatal day（PND） 21. Neurobehavio...To assess the neurotoxic effects and redoxresponses of Aroclor 1254 （A1254） on perinatallyexposed rat offspring, A1254 was administered bygavage from gestational day （GD） 6 to postnatal day（PND） 21. Neurobehavioral development,antioxidant enzyme activities, lipid peroxidation（LPO）, nitric oxide （NO）, and NO synthase （NOS）levels were analyzed in the offspring.Neurobehavioral development analysis revealeddelayed appearance of the righting reflex, negativegeotaxis, and cliff drop test responses in A1254exposed group. Developmental A1254 exposurealso caused oxidative stress in the brain of PND 22offspring via reductions in the activity of SOD andGSH-Px, and by promoting a rise in the levels of NOand NOS.展开更多
文摘使用商品化弗罗里硅土小柱对废水中的Aroclor进行净化。比较了不同极性洗脱溶剂和洗脱体积下弗罗里硅土小柱的净化效果。采用1 g/6 m L的弗罗里硅土小柱净化时,洗脱液体积大于8.0 m L,洗脱完全,未有目标物质被检出。淋洗溶剂的极性改变,对初始洗脱体积(0~3.0 m L)的洗脱效率会产生一定影响。随着极性的增加,目标物的回收率随之增加,但是共流出的干扰物也随之增加。
文摘Aim: To evaluate the effect of polychlorinated biphenyls (PCB) and vitamin C on ventral prostatic antioxidant system in adult male rats. Methods: A group of 20 adult male rats were administered ip Aroclor 1254 in corn oil at a dose of 2 mg·kg-1·day-1 for 30 days. Ten control rats were administered only the vehicle. After 30 days the treated rats were divided at random into 2 sub-groups of 10 animals each. One sub-group received vitamin C at a dose of 500 mg·kg-1·day-1 for 10 days. The other group was maintained as Aroclor 1254 control. Twenty-four hours after the last treatment the rats were killed by decapitation. Ventral prostatic homogenate was prepared and used for the estimation of enzymatic antioxidants, including superoxide dismutase (SOD), catalase (CAT) and glutathione-S-transferase (GST) and hydrogen peroxide (H2O2), lipid peroxidation (LPO) and prostatic acid phosphatase. The serum levels of total T3, total T4, TSH, testosterone and estradiol were also assayed. Results: The body weight and ventral prostatic weight were reduced in PCB treated rats. The activities of SOD, CAT, GST and acid phosphatase were decreased while the levels of H2O2 and lipid peroxidation were increased in the ventral prostate of PCB treated rats. Administration of vitamin C restored these parameters. Serum levels of thyroid hormones, estradiol and testosterone were decreased in PCB treated animals. Administration of vitamin C restored the thyroid hormone levels. Conclusion: PCB induces oxidative stress and decreases the antioxidant enzymes in the ventral prostate of adult male rats; the effects could be reversed by the administration of vitamin C.
文摘Objective:To evaluate the dose and duration dependent cytotoxicity of aroclor 1254 on mice testis.Methods: The study tests the hypothesis that in vivo exposure of very low dose aroclor 1254, comparable to that of possible human exposure from different environmental sources, will provoke dose and duration dependent histological damage in the mice testis. Male mice were orally administered with the two doses 0.1 and 1 mg/kg b.w /d. of aroclor 1254 for 7, 14, 21 and 28 days.Results:Results showed the degenerative changes in the testis of mice, namely, atrophied seminiferous tubules, expanded space in interstitial and necrosis in the germinal epithelial cells of seminiferous tubules, of the seminiferous tubules and deceleration of spermatogenesis.Conclusions: Therefore, the results of the present study suggested that the sub-acute exposure of very low doses of aroclor 1254, can subsequently mediate the cytoskeleton dysfunction in the testis of mice.
基金supported by the National Natural Science Foundation of China(No.21177087)
文摘To assess the neurotoxic effects and redoxresponses of Aroclor 1254 （A1254） on perinatallyexposed rat offspring, A1254 was administered bygavage from gestational day （GD） 6 to postnatal day（PND） 21. Neurobehavioral development,antioxidant enzyme activities, lipid peroxidation（LPO）, nitric oxide （NO）, and NO synthase （NOS）levels were analyzed in the offspring.Neurobehavioral development analysis revealeddelayed appearance of the righting reflex, negativegeotaxis, and cliff drop test responses in A1254exposed group. Developmental A1254 exposurealso caused oxidative stress in the brain of PND 22offspring via reductions in the activity of SOD andGSH-Px, and by promoting a rise in the levels of NOand NOS.
