The paper is to explore the goals and models of Orthodontic teaching in eight-year medical students. It tries to design some teaching goals, teaching models and standards of examination to train medical students according to the eight-year program characteristics, and discuss the problems of eight-year program orthodontic teaching.

Objective To explore the protective effects of lycium barbarum polysaccharides(LBP) on fibroblast in vitro irradiated by ultraviolet A(UVA). Methods Taking the primary cultured fibroblast as objects, the fibroblast was irradiated by UVA ( irradiation intensity: 2.4 J/cm2). The fibroblast was randomly divided into six groups, control group, UVA radiated group and four protective groups(0.1 mg/ml LBP, 0.2 mg/ml LBP, 0.4 mg/ml LBP and 0.8 mg/ml LBP). The activities of cell proliferation were measured by MTT methods. The contents of MDA, the activities of SOD in the fibroblasts, and the activities of LDH in the supernatants of fibroblasts were determined by biochemical methods. Results The fibroblasts were irradiated by UVA (irradiation intensity: 2.4 J/cm2),the activities of cell proliferation was decreased,the activities of SOD was decreased too, the content of MDA and LDH increased. Compared with UVA irradiated group,in the given concentration,LBP could improve the activities of cell’s proliferation,improve the activities of SOD and decrease the contents of MDA in the cell, and decrease the content of LDH in the supernatants of cells significantly (P

0.05).The AI of tumor cells was(9.7?0.9)% in mice treated with endostatin compared to that (1.9?0.4)% in the group of control ( P

Objective To better understand the pathogenicity and evolution of Yersinia pestis, we carried out the whole genome sequencing of human-avirulent Yersinia pestis strain 91001, which was isolated from a species of rodent-Microtus brandti. Methods We utilized “whole genome shotgun” approach to get the genome sequence of 91001. Based on the finished and annotated genome sequence of 91001, as well as the previously published genome sequences of CO92 and KIM, we performed detailed comparative genomics analysis on their chromosomes and plasmids. Results The genome of 91001 consisted of one chromosome and four plasmids (pPCP1, pCD1, pMT1 and pCRY). The pPCP1 plasmid of 9 609bp was almost identical with its counterparts from reference strains, which possessed 10 CDS. Plasmid pCD1 was found to be a plasmid of the type III secretory apparatus, and its length was 70 159bp. Although its CDS are quite similar to those of the reference plasmids, there were obvious rearrangements which produced certain differences in structure among them. Another plasmid was pMT1, a 106 642bp plasmid, which showed slightly different architecture compared with the reference ones. There was no mutation in virulent-related genes of pMT1 and pMT1 of 91001, which seemed to have retained more fragments of an ancestor plasmid. pCRY was a novel plasmid discovered in this work. It was 21 742bp long and harbored a group of gene encoding type IV secretory system. pCRY seemed to be able to replicate. The length of chromosome of 91001 was 4 595 065bp, and among its 4 037 predicted CDS (coding sequences), 141 were possibly pseudogenes. There were many IS in the chromosome. Due to the rearrangments mediated by IS, the structure of 91001 chromosome showed significant differences compared with CO92 and KIM. According to the results of comparative genomics analysis, we deduced the genetic mechanisms of nitrate reduction, glycerol fermentation, arabinose and milibiose utilization in 91001. Conclusion According to the analysis of plasmids structure, pseudogenes distribution, nitrate reduction negative mechanism, gene comparison and chromosome architecture, we conclude that 91001 and other strains isolated from Microtus brandti and Microtus fuscus evolved from ancestor Y. pestis and then developed into a different lineage. The deletion of large genome fragments from 91001 chromosome and pseuogenes might contribute to its unqiue pathogenicity and host-specificity.

Objective To establish reliable proteomics analysis models for Yersinia pestis and obtain the basic proteomics data of this pathogen. Methods The human-avirulent Y. pestis strain 91001 was cultured as an experimental strain, and the proteins of which were extracted and divided into three parts fractionally according to their solubility. Then three different methods (Shotgun-LC-MS-MS, 1D-LC-MS-MS and 2D-MS) were used to analyze the extracted proteins. The obtained data were compared with the theoretical protein database of strain 91001 so as to identify the expressed protein of Y.pestis strain 91001 in this study. Results 971 proteins were identified by shotgun-LC-MS-MS method, accounting for 23.4% of the predicted proteins of strain 91001 (971/4 143). 915 proteins were identified by 1D-LC-MS-MS method, accounting for 22.1% of the predicted proteins of strain 91001 (915/4 143). However, with 2D-MS only 5.62% of the predicted proteins (233/4 143) were identified. Altogether 1 193 proteins were identified when the results of the 3 methods added together, accounting for 28.7% of all the predicted CDS in 91001. Conclusion The kind and quantity of proteins identified by various proteomics methods differ from each other dramatically, therefore it is necessary to utilize multiple methods to get more reliable protein profiles of Y. pestis.

On the basis of summarizing association rules algorithm and algorithm optimization,the paper explores the rules of prescription compatibility in the scheme for apoplexy diagnosis and treatment through Traditional Chinese Medicine (TCM),establishes the TCM Electronic Medical Records (EMR) database,processes and analyzes the data based on the classical association rule-Apriori algorithm,introduces the parameter optimization mining results of correlated measurement parameters Kulc and IR,eliminates pseudo strong association principle,gets the drug compatibility with strong correlation and theoretical significance,and provides theoretical guidance and reference for apoplexy medication through TCM.

According to current situation of the undergraduates'scientific research,proposal of establishing the systematic research capacity training program was given,and this program's effects on undergraduates at our school were analyzed.

This study run through the process of developing behavioral medicine discipline in a general hospital with action research method,based on the balanced scorecard (BSC) framework.The four perspectives of the behavioral medicine BSC covered the main areas in hospital discipline development,including patients and community,healthy financial disciplines,clinical service process and efficiency,and research,innovation and growth.By the implementation of the discipline BSC,this hospital clarified its discipline development strategy,provided a communication platform,determined the objective and monitored the discipline effectively,and provided a mode which can integrate the discipline development and providing clinical services.The hospital set up the first neurology behavioral medicine clinic in Jinan Region though the exploration of the path and methods for developing behavioral medicine discipline,which had practical guiding significance for behavioral medicine development and services.

This paper introduces a new method which controls discharge energy accurately. It is achieved by calculating target voltage based on transthoracic impedance and accurately controlling charging voltage and discharge pulse width. A new defibrillator is designed and programmed using this method. The test results show that this method is valid and applicable to all kinds of external defibrillators.
Defibrillators ; standards ; Equipment Design

Objective To evaluate efficacy in detecting lung nodules at low-dose CT(LDCT) by nodule enhanced viewing(NEV).Methods One hundred and twenty seven patients who were referred to undergo low-dose CT (LDCT) for the evaluation of pulmonary metastasis or screening lung cancer were selected randomly.Two radiologists with at least 10 years experience read the images with normal clinical reading speed to find actionable nodules ≤ 2.0 cm in maximum diameter,and their consensus result was referred as Standard.NEV was adopted to detect the pulmonary nodules.Two residents with experience of less than three years read first detected suspicious nodules and recorded reading time,first consensus and mean time were recorded.Then,they made second decisions on the images with the help of NEV and the results and the reading time were recorded and analyzed by using wilcoxon test.The sensitivity and accuracy of NEV,residents and residents with NEV were analyzed.Results Standard,resident,NEV and resident with NEV detected 570,404,768 and 593 lung nodules ≤2.0 cm in maximum diameter,respectively.More than 60％ nodules were less than 0.5 cm in maximum diameter.The performance of NEV in detecting nodules ≤2.0 cm as well as nodules ＜ 0.5 cm in maximum diameter was significantly higher than that of the resident(Z =-6.887,P ＜0.01 and Z =-7.235,P ＜0.01),and the performance of resident with NEV indetecting nodules ≤2.0 cm as well as nodules ＜ 0.5 cm in maximum diameter was significantly higher than that of resident without NEV (Z =-6.606,P ＜ 0.01 and Z =-6.657,P ＜ 0.01).The resident,NEV and the resident with NEV detected nodules ＜ 20 mm in maximum diameter with sensitivities of 61.4％,86.3％ and 95.3％,and with accuracy of 56.1％,58.1％ and 87.6％,respectively.The resident achieved sensitivities of 51.4％,88.1％ and 94.8％,and accuracy of 47.0％,56.9％ and 87.5％ for nodules ＜5 mm in maximum diameter,respectively.The resident,NEV and resident with NEV spent 120-444 s,85-262 s and 131-1512 s per case to read the CT scans,respectively.The reading time of resident with NEV in was significantly higher than that of resident without NEV(Z =-9.781,P ＜ 0.01).The resident spent 23 s per NEV mark.Conclusion NEV considerable improves the resident's performance in lung nodule detection,especially in maximum diameter ＜ 0.5 cm nodule detection.