两面针抗性生理的测定

利用两面针试管苗及其野生苗,研究其过氧化氢酶(CAT)和过氧化物酶(POD)和电导率(EC)的变化.实验结果表明:两面针试管苗的过氧化物酶活性、过氧化氢酶活性都比野生两面针苗的强,电导率大于野生苗,从生理生化角度阐明培养环境对两面针试管苗影响.     

NaCl胁迫对苎麻叶片中SOD、POD及CAT活性的影响

在NaCl胁迫下，研究苎麻超氧化物歧化酶（SOD）、过氧化物酶（POD）和过氧化氢酶（CAT）活性的变化。结果表明。苎麻叶片中SOD和CAT活性均在NaCl浓度为9g／L时活性达到最大值，随后有所下降。苎麻叶片中POD活性在NaCl浓度6g／L时活性达到最大值。     

运动对小鼠自由基代谢及衰老的影响

通过对造衰小鼠进行12周不同负荷的游泳训练,观察血清和组织线粒体中的丙二醛、超氧化物歧化酶和过氧化氢酶以及脑组织中的脂褐素的变化结果发现不同负荷运动对抗氧化酶的活性和丙二醛的含量以及脑组织中的脂褐素的水平影响不同。     

江蓠藻膳食纤维对衰老小鼠脂质过氧化的影响

研究江蓠藻膳食纤维的抗脂质过氧化作用.将小鼠随机分为空白对照组、模型对照组、燕麦膳食纤维组,以及江蓠藻膳食纤维高、中、低剂量组.在给药的同时,除空白对照组外,其余各组小鼠每天颈背皮下注射10%的D半乳糖0.25mL,连续给药40 d后,测定小鼠脾指数、胸腺指数,以及血清、心、肝、肾、脑中过氧化氢酶(CAT)、超氧化物岐...     

人红细胞衰老过程抗氧化酶活性的研究

本文以新鲜及保存不同时间的献血员血液为研究材料,分别测定混匀、年老、年青三种状况 RBC 中的 GSH-PX、CAT 和 SOD 活性,获得了随血液保存期延长而三种酶活性皆显示逐周下降的结果。并且观察到年老 RBC 中三种酶活性比年青 RBC 中的酶活性更低、差别显著。我们的结果提示,RBC 衰老过程与这些抗氧化酶活性下降密切有关。     

Chronic hydrogen peroxide intake and peroxide metabolizing enzyme activities in some tissues of mice and rats

Summary Chronic daily intake of 0.5% H₂O₂ in drinking water decreased Se-dependent glutathione peroxidase (Se-GSHPx) activity in rat skeletal muscle, kidney and liver. Non-Se GSHPx activity decreased in kidney. Deprivation of drinking water decreased Se-GSHPx activity in kidney and non-Se GSHPx activity in kidney and liver. H₂O₂ intake decreased activity of catalase in rat skeletal muscle. H₂O₂ intake or water deprivation caused no changes in these enzyme activities in mice.     

Role of active oxygen species in diethyldithiocarbamate-induced gastric ulcer in the rat

Summary Diethyldithiocarbamate, an inhibitor of Cu,Zn-superoxide dismutase, was recently found to be ulcerogenic in the rat stomach, and active oxygen species were found to be responsible for its ulcerogenicity. To clarify which active oxygen species play a role in ulcerogenesis, the effects of various scavengers and iron-chelators were studied. As superoxide dismutase and catalase reduced the ulcerogenesis induced by diethyldithiocarbamate, the superoxide radical and hydrogen peroxide were considered to play a pathogenic role in this ulcer model.     

Cu,Cd对小麦幼苗生长代谢及2种酶活性的影响

通过水培试验研究Cu,Cd对小麦幼苗生长代谢及植物过氧化氢酶和淀粉酶活性的影响.结果表明,培养10 d的小麦幼苗对Cu,Cd的富集量是随着重金属胁迫浓度的增大而增大,重金属胁迫浓度较低时,对小麦幼苗的株高和生物量影响不大,随着浓度增加,小麦幼苗生长明显受抑制;同时小麦幼苗中的过氧化氢酶活性随重金属胁迫浓度增加而上升,淀粉酶活性则先上升后降低.