Objective:To evaluate the biological safety of commercial pure Ti (cpTi),Ti alloy Ti6Al4V and stainless steel 316L.Methods:According to the GB/T16886.5-2003 and YY/T0127.2-2009 standards,the extraction of the 3 materials was respectively prepared,cck-8 assay was used to test their cytotoxicity,single cell gel electrophoresis was used to test their genotoxicity,and in vivo test was used to test their acute systemic toxicity.Results:The cytotoxicity of 100％ extractions of 316L,Ti6Al4V and cpTi was graded to 2,1 and 0,the olive tal moment(OTM) 10.79 ±0.39,9.84 ± 1.78 and 0.92 ± 1.43,the percentage of tail DNA (1.22 ±0.06) ％,(0.92 ± 0.43) ％ and (0.43 ± 0.01) ％ respectively.No systemic toxicity and no body weight change was observed in the acute systemic toxicity test in mice.Conclusion:cpTi has better biologic safety than Ti6Al4V and 316L.

Objective To explore the cause,classification,incidence rate,diagnosis and treatment of pulmonary sequestration.MethodsThe data of 22 cases was analysed and the literatures were reviewed.ResultsThere were 22 cases of sequestration that confirmed by pathology after resected in our department from 1997 to 2007,of which 16 cases(72.7%)were confirmed before operation.The incidence rate was 5.7% comparing with the same time lobectomy.There were 20 cases(91%) of intralobar type and 2 cases(9%) of extralobar type.In intralobar type,18 cases were accompanied with infection and 2 cases with hemoptysis.2 cases had no symptom in extralobartype.ConclusionPulmonary sequestration is not an rare disease.The diagnosis mainly depends on X-ray.Sometimes,bronchography,retrograde arteriography or CT can also help making the diagnosis correctly.Operation is the main treatment method.Special attention should be paid to avoiding injure to the vessels during operation.

Objective To approach the cause,radiologic images feature and clinical diagnostic technique in pulmonary aspergillosis.Methods We retrospectively evaluated the clinical presentation,symptoms,x-ray film and radiologic images,and clinical diagnostic methods of 36 cases with pulmonary aspergillosis.Results All cases were cured though operation and conformed by pathologic diagnosis.28 cases were diagnose as pulmonary aspergillosis,4 cases as lung cancer,3 casses as pulmonary tuberculosis,1 case as pneumonia.Conclusion Pulmonary aspergillosis was usual secondary to pulmonary tuberculosis,radiologic images feature was contribute to diagnosis,pathologic proof and fungus isolation in infected pulmonary tissue were gold standard.

BACKGROUND:The development of tissue engineering techniques provides new methods and ideas for the repair and functional reconstruction of articular cartilage defects.
OBJECTIVE:To summarize the research progress in the application of mesenchymal stem cel s, as seed cel s, in articular cartilage tissue engineering.
METHODS:A computer-based retrieval was performed to search articles describing articular cartilage tissue engineering and mesenchymal stem cel s published between January 1st, 2000 and September 30th, 2014 in PubMed database with the key words of“articular cartilage defects;cartilage tissue engineering;mesenchymal stem cel s”in English. Seventy articles were retrieved initial y, and only 49 were included in further analysis.
RESULTS AND CONCLUSION:The ability of the articular cartilage for defect self-repair is limited, and current clinical treatments cannot be satisfactory. Development of tissue engineering provides a new idea for problem-solving. In the selection of seed cel s, chondrocyte is limited to dedifferentiate, and embryonic stem cel is restricted by ethical, legal and other aspects. Autologous mesenchymal stem cel s, which are easy to be amplified
and exhibit excel ent cartilage differentiation potential, have gained widespread attention. But there is stil some controversy on the current application of tissue engineering techniques for repair of articular cartilage defects, including a certain gap between the long-term effects and the clinical applications. So the effect of mesenchymal stem cel s on biological structure and mechanical function stil needs further studies.

Teacher portfolio is originally used for teacher assessment.The role of a teacher portfolio includes strengthening teaching ethics for improving faculty's quality of professional ethics,finding faculty's disadvantages and problems,enhancing faculty's training,providing the basis for faculty assessment,promotion and the appointment,and developing clinical teachers' teaching and research capacity.

Induced pluripotent stem cells (iPSCs) are derived from differentiated somatic cells through reprogramming in vitro.Similarly to embryonic stem cells (ESCs),iPSCs have the ability of unlimited selfrenewal and multiple differentiation potential.But they are without the constraints of immunology and ethics and acquire conveniently.Patient-specific iPSCs provide an invaluable resource for disease modeling,drug discovery,regenerative therapy,immune therapy and cellular delivery vehicle in cancer therapy.Nowadays,the application of iPSCs technology has made some progress in the treatment of tumors.

Objective To investigate health behavior level and self-efficacy in patients underwent coronary artery stent implantation,and to discuss the relationship between health behavior and self-efficacy and to offer proof to the intervention strategy of health behavior.Methods HPLP Ⅱ,self-efficacy questionnaire were used as main tools.106 patients underwent coronary artery stent implantation were investigated.Statistics analyses were performed using the Statistical Package for Social Science(SPSS)13.0.Results (1)The score of total HPLPⅡwas 130.08±21.25,the range of that was 84～180.The health behavior level of47.2%patients was general or worse,and that of 52.8%patients was good or better.(2)The score of self-efficacy was 71.37±16.32,the range of thatwas 38～110.(3)There were significant positive relationship in the scores of total HPLP Ⅱ and the six elements,and self-efficacy.The correlation coefficient was 0.389～0.916(P＜0.01).Conclusion The health behavior level of patients underwent coronary artery stent implantation was not in an ideal state.Self-efficacy has a positive effect on health behavior.The importance motivating factor should be attached to nursing practice and education by medical staff,and medical staff should establish and supervise to carry out corresponding intervention measure.

In this article, we applied single multiple factor analysis and paired iron supplement test to determine the effect of IDA on mental development in 6-36 months infants and children.333 infants and children aged from 6 to 36 months in kindergarten were selected for the experiment. The social environment, physical condition, developmental quotient (DQ), and so on were investigated. The results showed that the DQ in IDA infants (95.32, 9.47) was lower than that of the normal (101.62,10.28) P

Objective To investigate the clinical pathology characteristics of the p27 and C-myc protein expression in lung squamous cell carcinoma and adenecarcinoma as well as the correlation between the expressions of them. Method The expressions of p27 and C-mye protein in tumor tissue of 35 cases excised during pulmonectomy for lung squamous cell carcinoma and adenocarcinoma patients were examined using immunochemical method,and compared with 10 cases of normal lung tissue. Results The total positive rate of p27 protein was 17.1%(6/35 ) in 35 eases of tumor tissue, but 90.0%(9/10) in normal lung tissue, and there was significant difference (P< 0.05 ). Between high-moderate and low differentiated tissue,the positive rate had significant difference (P = 0.005). There was no significant difference of p27 protein expression in patients with different tumor size and histology types, as well as with or without lymph nodes metastasis (P > 0.05 ). The total positive rate of C-myc protein was 85.7% (30/35) in tumor tissue, but no expression existed in normal lung tissue (P < 0.05). There was significant difference of C-myc expressions between the tissue with and without lymph nodes metastasis (P =0.013),but there was no significant difference in various tumor size, differentiated degree, as well as histology type(P> 0.05). The expression of p27 and C-myc in lung squamous cell carcinoma and adenecareinoma showed negative correlation.Conclusions The expression of p27 protein is positive in normal lung tissue, but shows outstanding decrease in lung squamous cell carcinoma and adenocarcinoma tissue. Its expression correlates with the differentiated degree. The expression of C-myc is negative in normal lung tissue but shows significant increase in lung squamous cell carcinoma and adenocareinoma tissue and its expression correlates with lymph nodes metastasis. C-myc may be a valuable marker in evaluating prognosis.

Objective To study the effect of loop electrosurgical excision procedure(LEEP) and colposcope in diagnosis and treatment for cervical intraepithelial neoplasia.Methods A prospective randomized control trail was performed in 116 cervical in traepithelial neoplasia(CIN) patients wederwent LEEP.In 60 patients in the study group,the colposcope definitude locality and distributing of CIN before LEEP.In 56 patients the control group,spread Iodin solution on cervical definitude locality and distributing of CIN before LEEP.Then,follow-up was performed postoperatively in 1,3,6 months respectively.The operation time,the bleeding volume,the rate of residual were compared between the two groups,follow-up CIN.Results The rate of residual in the study group (4/60)6.67 ％ was lower than that in the control group(10/56) 17.86％.There was statistical difference between them(P =0.018).There was no statistical difference between them in the operation time and the bleeding volume( P ＞ 0.05 ).Conclusion With colposcope,Can reduce the rate of residual.