电子阅览室的微环境质量现状及控制与预防措施

本文针对目前电子阅览室的微环境质量的现状,介绍了造成电子阅览室微环境污染的污染物来源、类型和对人体的危害及控制与预防措施,以引起人们对电子阅览室微环境质量的关注。参考文献3。     

刺五加对甲醛致运动大鼠心肌氧化损伤的保护作用研究

目的:通过实验观察甲醛对运动大鼠心肌组织抗氧化系统的影响及服用刺五加后的作用。方法:采用人为模拟不同程度甲醛染毒环境进行动式染毒,甲醛剂量分别为0.8mg/m3,2.4mg/m3。每天染毒30min,每周6次,连续4周,刺五加的灌胃剂量为104.17mg/kg,测定运动大鼠心肌组织的超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、过氧化氢酶(CAT)的活力和丙二醛(MDA)的含量。结果:染毒组与对照组相比,2.4mg/m3剂量染毒运动组大鼠心肌组织CAT、GSH-PX、SOD活性明显低于对照组(P0.01),MDA含量明显高于对照组(P0.01)。服药染毒运动组与染毒运动组相比,0.8mg/m3剂量染毒服药组大鼠心肌组织CAT、GSH-PX、SOD活性明显高于染毒运动组(P0.01),MDA含量明显低于染毒运动组(P0.01)。结论:甲醛可以降低染毒大鼠心肌组织抗氧化酶的活性,造成心肌组织氧化性损伤,而灌服中药刺五加可以有效缓解其毒性。     

Immunogenicity of formaldehyde and binary ethylenimine inactivated infectious bursal disease virus in broiler chicks

Infectious bursal disease virus （IBDV） was inactivated by two different chemicals-formaldehyde and binary ethylenimine （BEI）. Formaldehyde was used at 0. 1% and 0.2%, while BEI was used at concentrations of 0.001 and 0.002 mol/L. These four vaccines were tested for their efficiency in generating humoral immune response in different groups of broiler chicks. Both BEI-inactivated vaccines gave relatively higher antibody titers and were almost twice as efficient as formaldehyde-inactivated ones.