The objective of this study is to obtain a comprehensive understand the view of inservice education master degree program students on their supervisors' performance in teaching and research in Peking University Health Science Centre.on their.This study was conducted by using the questionnaire-based survey which includes questions regarding research quality,research conditions and scientific spirit etc.We concluded that Peking University Health Science Center,by formulating practical regulations and adopting relevant policies,managed to keep the capacity building for the supervisors and will further improve quality of the in-service graduate program.

Objective To investigate the clinical effects and operation key-points of interphalangeal joint replacement arthroplasty for the treatment of traumatic arthritis.Methods From March 2005 to December 2010,5 patients with post-traumatic arthritis undergoing interphalangeal joint replacement arthroplasty in our hospital were selected.The operation indications,treatment of intraoperative flexor and extensor tendon lesion and postoperative rehabilitation were evaluated.Results Operative incisions of 5 cases were primary healing in class I grade A.Stitches were taken out 2 weeks after the operation.Patients were followed up for 1.5 years.The range of interphalangeal joint motion was 0 to 90 (extension/flexion) with no pain at end of follow-up.The hand function was excellent in 3 cases and good in 2 cases according to total active motion (TAM)hand function evaluation.Conclusions Interphalangeal joint replacement arthroplasty is an effective treatment for traumatic arthritis.Preoperative indications evaluation and postoperative rehabilitation should be focused on the treatment.

Objective To investigate the influence of ozagrel sodium (OS) on cerebral ischemic tolerance in rat induced by focal ischemic preconditioning (IPC) and on expression of nuclear factor ?B (NF ?B) in rats Methods Fourty five rats were divided into 3 groups The animals were subjected to 2 h middle cerebral artery occlusion (MCAO) 3 days after 10 min IPC, IPC+OS and sham surgery (SS) respectively. After 22 h reperfusion, the rats were killed and the infarct volume, brain water content and NF ?B immunoreactivity were compared among 3 groups. Results Compared with IPC+ MCAO group, there were a furtber decrements in farct volume (93 75?13 40 vs 130 92?14 59, P

Actual research on brain-computer interface system is analyzed.The basic structure and operational principle of this system are set forth.Methods of signal collection,feature extraction and selection classification of system signals are concluded.Latest analysis methods and existing defects of feature extraction and selection classification are introduced in detail.Problems existing in brain-computer interface system are also analyzed.Great advantages on feature extraction of wavelet transform & wavelet packet decomposition and wide prospects on selection classification of neural network are pointed out at last.

Estrogen receptor(ER),an important transcription factor belonging to the nuclear receptor superfamily,comprises two subtypes ER?and ER?.Estrogen receptor is expressed in prostate cancer and ladder cancer and has a compacted relationship with them.In this review,we summarized the structure,distri- bution,function of different estrogen receptor subtypes and progress in study on relationship between different estrogen receptor subtypes and prostate or bladder cancer.

Objective To longitudinally analyze the unit costs and technical efficiency of the model of male circumcision in the different kinds of persons .Methods Unit costs were calculated by the person and period using longitudinal data from 3 kinds of persons ,and then technical efficiency and Malmquist indices were measured with an approach to data envelopment analysis . Results Theunit costs for changing the willingness to accept surgery changed dramatically ,decreasing from 7 166 .67 yuan(mean) to 737 .31 yuan ,while the costs for changing the ratio of the surgery increased from 666 .64 yuan (mean) to 744 .58 yuan ,and its technical efficiency was averaging between 0 .95-0 .96 .Conclusion The time series of unit costs for changing the willingness to ac-cept surgery dramatically dropped ,while changing the ratio of the surgery formed a U-shape curve with an inflection point before which unit costs dramatically dropped and another inflection point beyond which unit costs went up .These findings can inform pro-gram managers of the changing unit costs when extending or expanding the program .

Objective To detect the level of IL-10 and IL-21 in serum of patients with psoriasis and explore its significance of judge the extent of serious condition and treatment of psoriasis.Methods According to clinical dermatology edited by Zhao Bian diagnostic criteria,selected 65 cases of patients with psoriasis during the period from March to September in 2014 ad-mitted to Department of Dermatology of out-patient and hospitalization.25 cases were progressive stage (group A),20 pa-tients with stable stage (group B),20 patients were in recovery period (group C),and 25 cases of control group (group D). With ELISA method detect the expression level of IL-10 and IL-21 in serum of each group respectively.PASI score will take to all psoriasis patients meanwhile.Results The expressionlevels of IL-21 in serum of A (127.59 ± 16.09 pg/ml),B (105.74±21.08 pg/ml)two groups were significantly higher than that in D group (85.46±14.25 pg/ml),and the differ-ence were statistically significant (t=5.174,4.863,both P <0.01),while the expression levels of IL-10 in A (10.64±3.23 pg/ml)and B (12.27±2.18 pg/ml)were both lower than D group (20.29±2.51 pg/ml),and the difference were statisti-cally significant (t=2.031,2.027,both P <0.05).The expression of IL-21 (94.03±8.90 pg/ml)in C group was higher than that in D group,and the difference was statistically significant (t=2.033,P <0.05).The level of IL-21 in A group was higher than that in group C,and the difference was statistically significant (t=2.352,P <0.05),while the expression level of IL-10 was lower than that in C group (19.69±1.54 pg/ml),and the difference was statistically significant (t=2.071,P<0.05).The expression level of IL-21 in the serum of patients with psoriasis and PASI score was positively correlated (r=0.508,P =0.027),while the expression level of IL-10 and PASI score was negatively correlated (r=-0.413,P =0.039). Conclusion The progression of psoriasis is related to the increasion of IL-21 or the decreasion of IL-10.The detection of IL-21 and IL-10 was beneficial to judge the severity and efficacy evaluation of psoriasis.

We surveyed the graduate students at Peking University Health Science Center for the difficulties during their study. The result showed that the major difficulties were job pressure, completing studies and economic burden. Some students were also bothered by love affairs, health conditions and interpersonal relationship. Suggestions were made for future work to help these students to cope with such difficulties to complete their study smoothly.

Objective To observe any changes in spinal cord hemodynamics after spinal cord injury and to investigate their mechanism. Methods Twenty female Sprague-Dawley rats were divided into a control group and a moderate injury group,10 rats in each group.A rat model of spinal cord injury caused by moderate compression was established using Nystrom's method.Changes in the velocity and volume of blood flow and in the diameters of vessels of the spinal cord were monitored for 6 hours using laser speckle imaging. Results No changes in the velocity or volume of blood flow or in the diameter of vessels were observed in the control group,but all of these indices diminished significantly in the injury group. Conclusions Laser speckle imaging can be used to monitor changes in spinal cord hemodynamics.Such changes after acute spinal cord injury indicate progressive post-injury ischemia.The occlusion of veins may be an important contributor to post-injury ischemia.

Comet Assay