Aim To investigate the effects and possible mechanisms of kaemperol in the rats with chronic cere-bral ischemia.Methods Chronic cerebral hypoperfu-sion model was produced by permanent occlusion of bi-lateral common carotid arteries (2VO)in rats.After KAE treatment,the rats underwent Morris water maze and prehensile traction test.Neuronal morphology was observed using Nissl and HE staining.The activity of SOD and the content of MDA in brain tissue were de-termined.The DJ-1 protein expression was assayed by Western blot.Results Compared with 2VO model group,KAE significantly improved learning and memo-ry and the grasping ability.In addition,KAE signifi-cantly reduced brain tissue pathological injury induced by 2VO. Furthermore, KAE significantly increased SOD activity and enhanced antioxidant protein DJ-1 ex-pression in brain tissue.Conclusions KAE could sig-nificantly attenuate the cognitive impairment,limb bal-ance dysfunction and pathological injury in rats with chronic cerebral ischemia.The mechanism may be re-lated to improving the antioxidant system in vivo.

OBJECTIVE:To explore drug quality dynamic evaluation mechanism based on analysis of drug quality announce-ment data. METHODS:The sorts and types of drugs,places of origin,quantity of production enterprises and frequency distribu-tion of being mentioned were analyzed on the basis of drug quality announcement issued by CFDA and provincial administration in 2013. RESULTS & CONCLUSIONS:Frequency of TCM being mentioned (0.75%) was higher than that of chemical drug (0.30%). Among drugs mentioned more than 10 times,the most chemical drugs were injection (70%) and the most TCM were tablet(66.7%). Among all types,drug types produced by more than 100 enterprises accounted for 62.5%,and those produced by more than 50 enterprises accounted for 93.75%,which indicated the frequency of problems was in relatively direct proportion to the quantity of drug manufacturing enterprises. Top 10 provinces in the list of the number of drug quality announcements showed different characteristics of problem type distribution. In compassion,the quality problems of TCM in Jilin,Guangxi,Mongolia,Si-chuan were prominent,and reference number proportion of involved TCM were 85%,80%,97% and 69%,respectively;the quality problems of chemical drugs in Henan,Shanxi,Jiangsu,Guangdong,Anhui,Shandong should be paid attention,and refer-ence number proportion of involved chemical drugs were 62%,61%,95%,57%,86% and 65%,respectively. It is suggested that the government should carry out the dynamic risk assessment system based on data of drug quality announcement,and strength-en standard management of data collection of local drug quality announcement.

The stability of marginal bone level is an important factor in ensuring long-term good clinical efficacy of implantation.The design of implant-abutment interface(IAI)is of considerable importance,including whether undergoing multiple abutment disconnection,whether platform switching is used,connection type,connection torque,and connection material differences.These fac-tors can affect the micro gap and micro movement of the connection interface,which change the size of micro leakage and mechanical stability,thereby affecting the long-term clinical efficacy of implants.This article presents a detailed review of the progress of research on different designs in implant-abutment interface,in order to provide a theoretical basis for the selection and operation of abutments in clinical diagnosis and treatment.