With self-designed experiment as its basis,Basic Medical College of Shanghai Jiao Tong University has made teaching reform that is design-oriented and integrative with intent to cultivate students' innovation consciousness and practice ability.As a result,a teaching model of"research-based learning",which aims at bringing forth innovative talents,has been constructed and produced desired effects.

Carbapenems ; pharmacology ; Drug Resistance, Bacterial ; Humans ; Klebsiella Infections ; drug therapy ; microbiology ; Klebsiella pneumoniae ; drug effects

OBJECTIVE:To observe the efficacy and safety of vitamin A acid combined with vitamin A,vitamin E,celecoxib in the treatment of oral leukoplakia. METHODS:104 patients with oral leukoplakia were randomly divided into control group(52 cases) and observation group (52 cases). Control group received 1 Vitamin A soft capsule,3 times a day+1 Vitamin E soft cap-sule,3 times a day+1 Celecoxib capsule,twice a day. Observation group additionally received 1 Vitamin A acid tablet,twice a day. 4-week was regarded as 1 treatment course,it lasted for 3 courses. Clinical efficacy,and leukoplakia number,maximum diam-eter of leukoplakia,immunoglobulin A(IgA),IgM,IgG before and after treatment,and the incidence of adverse reactions in 2 groups were observed. RESULTS:The total effective rate in observation group was significantly higher than control group,the dif-ference was statistically significant(P<0.05). Before treatment,there were no significant differences in leukoplakia number,maxi-mum diameter of leukoplakia,immunoglobulin levels in 2 groups(P>0.05). After treatment,leukoplakia number,maximum diam-eter of leukoplakia,IgA and IgM in 2 groups were significantly lower than before,and observation group was lower than control group,IgG was significantly higher than before,and observation group was higher than control group,the differences were statisti-cally significant (P<0.05). And there was no significant difference in the incidence of adverse reactions in 2 groups (P>0.05). CONCLUSIONS:Vitamin A acid combined with vitamin A,vitamin E,celecoxib shows obvious efficacy in the treatment of oral leukoplakia,it can effectively reduce clinical symptoms,improve immune function,with good safety.

Objective To determine the ability of biofilm formation of Staphylococcus ephtermidis isolates and analyze the correlation between the icaA gene and its expression and biofilm formation. Methods Collecting 205 Staphylococcus epidermidis isolates identified with normal laboratory tests (coagulase-negative, biochemical identification, polymyxin-resistant and novobiocin-sensitive ), the suspected isolates were con-formed with API-Staph. Biofilm production was assessed by incubating the strains on Congo Red Agar (CRA) plates and quantitative biofilm production determined by a 96-well tissue culture plate and biofilm morphous were detected by scanning electron microscope ( SEM ) ; Amplifying partial fragments of icaA genes with PCR; Analyzing the expression levels of icaA gene with RT-PCR through Bio-Rad system and Quantity One software. Results 24 isolates showed positive in CRA tests, 22 isolates were positive in semiquantita- tive adhesion assays and 28 isolates existed icaA gene among 205 isolates of Staphylococcus epidermidis. The icaA-positive strains demonstrated biofilm formation (microcolonies on silica films ) while icaA-negative strains only adhered as individual cells under scanning electron microscope. All 22 strains which showed positive in semiquantitative adhesion assays harbored the icaA gene. The expression levels of icaA gene with RT-PCR in 6 Staphylococcus epidermidis isolates showed a higher tendency in 4 strains which demonstrated positive in semiquantitative adhesion assays than 2 negative strains in semiquantitative adhesion assays. Conclusion The isolations of Staphylococcus epidermidis have the abilities of forming biofilm, and the icaA gene and its normal expression is the important molecular biology foundation of biofilm formation. Other fac-tors maybe involve in the expression of icaA gene in Staphylococcus epidermidis isolates.

Objective To select a matrix modifier,which can effectively eliminate the matrix interference in the determination of chromium in cosmetics by graphite furnace atomic absorption spectrometry(GFAAS).Methods The orthogonal experiment design was used to define the best operation parameter of graphite furnace.Vitamin C,(NH4)H2PO4,(NH4)2HPO4,NH4Cl and Mg(NO3)2 were added respectively as the matrix modifiers.The effect of five matrix modifiers was compared by precision test.Results When(NH4)H2PO4 was taken as the chemical modifier,the determination result was satisfied.The characteristic mass was 5.68?10-12 g,relative standard deviation were from 2.11% to 4.46%.The rate of recovery of two cosmetics samples were 95.2% and 102.01%.Conclusion(NH4)H2PO4 can increase the ashing temperature,decrease the atomization temperature,eliminate the matrix interference and the result has good precision and accuracy.

Physiological pacing has undergone three stages: atrioventricular sequential pacing,chronotropic pacing and cardiac resynchronization therapy.How to make pacing therapy more physiological,so as to meet the physiological needs of patients,is the unremitting pursuit of clinicians.With further understanding of cardiac function and the development of pacemaker manufacturing technology,pacing function will become more and more physiological.At the same time,the newer generation of pacemakers will have more sophisticated program control function,higher automation,simulation of the doctor's thinking,and the pacing parameters can be optimized automatically after implantation allowing pacemaker to operate in the most effective and energy-saving state.From cardiac rhythm managers to heart disease managers,their unique efficacy will make physiological pacing function perfect day by day.In this paper,the research progress in this field is analyzed,which aims to provide the basis for pacing mode,pacing site and pacing interval in the future.

Objective To investigate the clinical pathological features and prognosis of gastric carcinoma with neu-roendocrine differentiation (NED) and mixed gonadal neuroendocrine carcinoma of the stomach (MANECs). Methods A retrospective analysis of 61 cases of gastric carcinoma with NED and 34 cases of MANECs and their histochemistry and im-munohistochemistry were also observed. Prognosis of the 2 groups were compared by the Kaplan-Meiers survival analysis. Prognostic factors associated with patients with gastric cancer were analyzed by COX proportional hazards model. Results Tumor location, distant metastasis and lymph node metastasis were statistically different between these 2 groups (P<0.05). Syn positive expression rate is higher than CgA and CD56 in the gastric carcinoma with NED group;Postoperative survive pe-riod of the gastric carcinoma with NED is shorter than that of MANECs (P<0.05). Lymph node metastasis and distant region-al transfer is obviously correlated with prognosis (P<0.05). Conclusion Immunohistochemistry is important for the diag-nosis of these two tumor. The number of neuroendocrine cells can help to assess prognosis and guide treatment.

We conducted questionnaire for anonymous answers.The sample comprised 388 papers.The results obtained response to inquiry.Based on human dermatoglyphics development,its teaching reform,curriculum construction have been made in this paper.

Based on the analysis of 5-year collected data,our study showed that the teacher and course characteristics influence student ratings significantly.The scientific and rea-sonable evaluation approaches provides fundamental information for teaching capacity enhancement and course improvement.

Legg-Calvé-Perthes disease is one of the most concerned hip diseases in the pediatric orthopaedic field.Although there are many treatments for Legg-Calvé-Perthes disease,new ideas for the therapy of Legg-Calvé-Perthes disease still exist.Moreover,the prognosis of the disease mostly focuses on the studies of the degree of involvement of the epiphyseal plate,age of onset and lateral pillar classification.This contribution summarizes the treatments and prognosis of Legg-Calvé-Perthes disease.