Objective To acquaint the condition of learning burnout of medical students and to explore the relationship of learning burnout with professional commitment and social support. Methods 610 medical students were evaluated with Learning Burnout Scale, professional commitment scale and social support scale. Results ①In general, learning burnout index of medical students was 2.84±0.49; in terms of gender difference, male students [(2.83±0.65) and (3.08±0.61)] were higher than females[(2.70±0.63) and (2.96±0.60)] at the level of emotional turndown and behavioral unsuitableness, the difference was statistically significant( P <0.05); in terms of grades, medical students'learning burnout of different grades was significant( F =4.244,P <0.01); there was no difference in profession. ②Learning burnout was significantly negative correlation with professional commitment and social support( P <0.01). ③Multiple regression analysis showed that affective commitment and family support had significant predications on learning burnout of medical students( P <0.01). Conclusion Medical students'learning burnout level is comparatively high, learning burnout closely relates to professional commitment and social support.

Objective To evaluate the clinical effects of continuous spinal anesthesia (CSA) with sufentanil for labor analgesia when compared with the effects of combined spinal-epidural analgesia (CSEA) and continuous epidural analgesia (CEA).Methods One hundred ASA Ⅰ or Ⅱ nulliparous patients who were at full term and who requested labor epidural analgesia,were randomly divided into 3 groups (n =40 each):continuous spinal analgesia group (group S),combined spinal-epidural analgesia group (group C) and continuous epidural analgesia group (group E).Labor analgesia was performed when the cervical dilation was 2-3 cm.In group S,the spinal catheter was placed at L3,4 interspace,and patient-controlled analgesia (PCA) with sufentanil was performed after a loading dose of sufentarnil 8 μg.PCA solution contained sufentanil 100 μg in 100 ml of normal saline.The PCA pump was set up with a 2 ml bolus dose,a 10 min lockout interval (volume was limited to 14 ml/h) and background infusion at a rate of 2 ml/h.In group C,CSEA was performed at L2,3 interspace,the patients received intrathecal sufentanil 8 μg via a spinal needle,the PCA solution contained 0.1％ ropivacaine 200 mg and 0.5 μg/ml sufentanil 100 μg in 200 ml of normal saline.The CSEA pump was set up with a 6 ml bolus dose,a 10 min lockout interval (volume was limited to 40 ml/h) and background infusion at a rate of 6 ml/h.In group E,CEA was performed at L2,3 interspace and the method was the same as in group C.The systolic pressure,diastolic pressure,HR,fetal heart rate (FHR) and intensity of uterine contraction were recorded beforeanalgesia and 5,10,15,30,60 and 120 min after beginning of analgesia,when the cervical dilation was 7-8 cm,and when the uterine cervix dilated absolutely.The side effects were recorded.Bromage scale was assessed at 10 min of analgesia.Apgar scores of the neonates were recorded at 1,5 and 10 min after birth.The analgesic effect was evaluated 24 h after birth.Results In group S,the hemodynamic parameters,FHR and intensity of uterine contraction were within the normal range,the analgesic effect was excellent or good,Bromage scale was 0,two cases had post-dural puncture headache,the incidence of pruritus was 42 ％ and pruritus was mild,Apgar scores of the neonates were 9.1 ± 0.4,9.6 ± 0.4 and 10 at 1,5 and 10 min after birth,respectively,no cardiovascular events occurred.There was no significant difference in the parameters mentioned above between groups C and S and between groups E and S (P ＞ 0.05).Conclusion CSA with sufentail is effective and suitable for labor analgesia and the efficacy is comparable with that of CSEA and CEA.

Objective To explore the relationship among personality,job burnout and knowledge sharing behavior of the enterprise employees.Methods The 44 items big five inventory(BFI) ,knowledge sharing inventory and job burnout inventory were administrated to 635 employees online.Results ( 1 ) Agreeableness had a significant main effect on knowledge sharing ( β =0.135, P＜0.01); (2)Cynicism( β = -0.140, P＜0.01) and reduced personal accomplishment( β = -0.125, P＜0.01 ) had a significant effect on knowledge sharing behavior and its two dimensions; (3) Job burnout partially mediated the relationship between agreeableness and knowledge sharing behavior(P＜0.01).Conclusion Enterprise employees' personality had different effects on knowledge sharing behavior,and job burnout was an important mediating role in the relationship above.

Isoflavones as a kind of phytoestrogen exist in soy plant widely. With the advantages of estrogen, they can regulate endocrine function of the human body, reduce blood cholesterol, decrease the incidence of coronary heart disease, prevent osteoporosis, inhibit tumor growth, and relieve pain. This article summarized the investigations on the medical value of isoflavones in recent years.

Hepatocellular carcinoma is the fifth malignant tumor in the world.Most patients who have been diagnosed have been in advanced stage,so mortality of hepatocellular carcinoma is thirdly in malignant tumor of digestive cancers.The effective tumor marks are the main method of early diagnosis or treatment and raising survival rate.This articles reviewed the several tumor marks which have been found in the past few years.

Cataract ; genetics ; Diabetic Retinopathy ; genetics ; Eye Diseases ; genetics ; therapy ; Genetic Therapy ; Glaucoma, Open-Angle ; genetics ; Humans ; Macular Degeneration ; genetics

Spermatogenesis is a process consisting of spermatogonial proliferation, spermatocytic meiosis, and spermiogenesis, and is also considered to be a process in which heterochromatins gradually aggregate and finally reach a highly condensed formation in the sperm head. Recent studies show that epigenetic regulation plays a key role in spermatogenesis. This review discusses the mechanisms of epigenetic regulation in spermatogenesis in three aspects, DNA methylation, histone modification, and noncoding RNAs. These factors are essential for spermatogenesis, fertilization, and embryogenesis by mutual regulation as well as by gene expression regulation, transposon activation, sex chromosome inactivation, and genome imprinting.
DNA Methylation ; Embryonic Development ; Epigenesis, Genetic ; physiology ; Genomic Imprinting ; Humans ; Male ; Meiosis ; Spermatogenesis ; genetics ; Spermatogonia ; cytology ; physiology

Teaching method is important to carry through the content of the course and guarantee the teaching quality.We have proceeded some reforms and research in the Obstetrics and Gynecology teaching and have obtained the good result by intergroting teaching conteut and teaching resoures,selecting high-level teaching team,case teaching,PBL teaching and multi-media teaching.

Relevant projects carried out within the Yangtze River economic belt on the impact of schistosomiasis epidemic and transmission are important issues for ecological priority in the process of implementing the strategy. The key problems of schistosomiasis epidemic risk,epidemic happening repeatedly,difficulty of rehabilitating Oncomelania hupensis snail control and schistosomiasis prevention forest,lag of evaluation system and platform construction,lack of basic research,et al. were ana-lyzed in the Yangtze River economic belt taking ecological priority as the basis in this paper. Then corresponding countermea-sures to these challenges were put forward so as to provide the reference for the national forestry schistosomiasis control pro-grams,which include:execution of the comprehensive prevention and control strategy,scheming of the new round of forestry schistosomiasis control programs,strengthening schistosomiasis prevention and control,promoting productivity in existing forest-ry to consolidate and improve the achievements of previous forestry schistosomiasis control programs,and promoting the intensi-ty of technological innovation to improve the technological level of forestry schistosomiasis control programs.

Objective:To study the transdermal permeability of Psoralen (Pro) and Isopsoralen (Isopro). Methods:V C two compartment was adopted to research the permeability deferences between Pso and Isopso in nude mouse skin in vitro, and investigated the effect of penetration enhancers, such as EtOH, azone and glycerol on the permeability of them. Results: Pso and Isopso are suitable compounds for transdermal delivery system and the permeability coeffient of Isopso is larger than that of Pso. 10% EtOH-1% Azone greatly increased the permeability coefficient. Conclusion: The results can offer reference for Psoralea corylifolia TDS.