Objective:To explore and analyze detection rate of lung lesions of 16 slice spiral CT low dose of TLC technique and conventional radiography. Methods: Selected 120 lung disease patients in our hospital , they were randomly divided into 16 layers of low dose spiral CT examination examination group and conventional thin chest lung examination group, each group had 60 patients,compared two groups’ detection rate of contrast. Results:16 thin layer of low-dose spiral CT technology inspection found 8 pulmonary fibrosis patients, including 6 emphysema patients, 5 tuberculosis patients, 2 lung cancer;there were 21(35%.00) lung disease in total.While conventional chest X-ray examination revealed 2 pulmonary fibrosis, 1 man tuberculosis, 2 lung cancer.There were 5(8.33%) lung disease in total. The detection rates of 16 slice spiral CT low dose of TLC examination of lung and conventional radiography examination of lung lesion had differences (x2=12.5696, P<0.05). Conclusion:16 slice spiral CT low dose of TLC inspection has higher detection rate compared with the conventional chest X-ray examination on lung lesions ,it can exam lung disease effectively, its radiation damage on physical examination and medical staff is small, and can be widely applied, it is worth to popularize.

The present thesis analyzes and discusses the concept of medical service strategy and its relation to medical equipment researches theoretically According to the prediction of future war,the author puts forward the idea and method of present strategy as well as developing strategy for medical equipment researches.And it also showes the critical points of them.

Objective To know the lavatory improvement in the rural areas in Shandong Province in 2005 and to present the data for the decision of the lavatory improvement in countryside in the future. Methods In 2005, 164 villages in 45 counties were chosen and questionaire was used to conduct the investigation. Results 15 338 different type lavatories were constructed, of which the indoor toilets occupied 71.70%, the outdoor toilets occupied 28.30%. About 11.19 million yuan RMB was spent on the program, the average cost of each lavatory was 729.60 yuan RMB. Conclusion The program of lavatory improvement in the rural areas has been finished in Shandong Province in 2005, the data are satisfactory.

Objective: To evaluate the influence of fusing conditions on the surface structure and morphology of the SP1 SiO2. Methods:The SP1 SiO2 samples were sintered under 500, 650, 800, 950 and 1 100 ℃ at a rate of 250 ℃/h and maintained for 10, 30 min, 3 h respectively. The surface structure was characterized by FT-IR. Results:The characteristic peak of Si-OH bond at 958 cm-1 took off gradually with the rising temperature and prolonged time. Under the conditions of 950 ℃ maintained for 10 min and 30 min, and 650 ℃ maintained for 3 h, it disappeared completely. The particles of the SP1 SiO2 became larger while the size distribution became narrow. Conclusion: Fusing conditions can affect the Si-OH content and the size of the SP1 SiO2, as well as the size of distribution.[

Objective To study the expression of CD105 in laryngeal carcinoma and to evaluate the clinical significance of microvessel density(MVD).Methods Pathologic paraffin-embedded sections and clinical data from 40 patients with primary squmamous cell carcinoma of larynx were studied through immunohistochemistry.Microvessel density(MVD) highlighted by CD105 and CD34 were counted.Results CD105 expression in tumour tissue was significantly higher than normal health mucosa.The mean CD105-MVD value of T3 and T4 tumours showed a significantly deeper staining than T1 and T2;The mean CD105-MVD value of tumours with metastasis was also markedly higher than tumours with no metastasis;The diffenerce of mean CD105-MVD value between in 16 patients with recurred laryngeal carcinoma and in 20 patients with unrecurred laryngeal carcinoma for two years of follow-up was markedly significant(P

Aim: To study the synthesis and anti-platelet aggregation activities of ferulic acidic esters so as to search for novel antithrombus agents. Methods: Based on prodrug strategy and combination principles, monoesters were first synthesized by reaction of ferulic acid with alcohols, and then the monoesters were coupled with aspirin to afford bis-esters. The target compounds were assayed for anti-platelet aggregation activities in vitro. Results: Sixteen target compounds and eight sideproducts including 15 new compounds were synthesized and their struc-tures were determined by IR, MS and ~1H NMR. The results demonstrated that some tested compounds exhibited potential anti-platelet aggregation activities. Conclusion: The bis-esters of ferulic esters coupling with aspirin with 4 to 5 carbons in side chain might be used as lead compounds for further study in searching for novel antithrom-bus agents.

Objective: To detect the optimal fusing temperature, the fusing time and the best filler ratio of α-Si3N4 and SP1SiO2, and to clarify their influence in the properities of dental resin composites. Methods: The α-Si3N4 crystalline were mixed with SP1SiO2 particle at the ratio of5:l (Wt%), and then were sintered under 500°C, 650°C, 800°C, 950°C and 1 100°C at a rise rate of 250 · h-1 and maintained for 10 min, 30 min and 3 h, respectively (used as α-Si3N4-SP1SiO2 groups). SP1SiO2 particle, α-Si3N4 crystalline, mixed and non-fused α-Si3N4 and SP1SiO2 (mixed) groups were set up, and two commercially available resin composites were selected and used as control groups. And they were fully mixed with the resin matrix in 60% (Wt%) after the treatment of cyclohexane solution to make the samples. The flexural strength of specimen was tested and the morphology of section under SEM was analyzed. Then α-Si3N4 was mixed with SP1SiO2 in a ratio of 2; 1. It was fused under the optimal fusing conditions. After the treatment of cyclohexane solution, it was mixed and polymerized with the resin matrix in the proportions of 20%, 40%, 60%, 70% and 75% (Wt%), and two kinds of commercially available resin composites were selected and used as control groups. The flexural strength of specimens was tested and the morphology of section under SEM was analyzed. Results: The maximum flexural strength value in α-Si3N1-SP1SiO2 groups was at 800°C and 30 min (P>0. 05); the flexural strength value was significantly higher than those in SP1SiO2 group, α-Si3N1 crystalline group, mixed group and two control groups (P<0. 05), and the morphology of section SEM was consistent with the mechanical properties. The flexural strengths of resin composites were increased gradually with the increasing of filler ratios of α-Si3N4 and SP1SiO2 fusion from 20% to 60% (P<0. 05); the flexural strength values of resin composites with the proportion of 60%-70% were not increased significantly, the flexural strength values of resin composites with the proportion of 70%-75% were decreased, and the flexural strength values of the resin composites with the proportion of 60% and 70% were significantly higher than those of resin composites with the proportions of 20%, 40%, 75% and control groups; the morphology of section under SEM was consistent with the mechanical properties. Conclusion: The optimum fusing condition for α-Si3N4 and SP1SiO2 is 800°C for 30 min, and the best filler ratio of α-Si3N4 and SP1SiO2 is 70%.

Following the development of clinical trials, the methodology of clinical trials has developed a great deal, including randomization method and blinding method, etc. The method of randomization includes simple randomization, stratification randomization, etc. Dynamic randomization is also considered as a method of randomization. Two dynamic randomization methods are introduced in this paper, including a method considering the balance of numbers in each group and a method considering prognostic factors. This paper also demonstrates the procedure of dynamic randomization of the above two methods by simulations and actual examples.

Objective:To explore the mechanism of renal injury in severe acute pancreatitis(SAP).Methods:54 SD rats were randomly divided into sham operation group(n=24) and SAP group(n=30).SAP model was induced by injection of 5% sodium taurocholate solution into bilo-pancreatic duct.Rats from each group were killed and the serum and ascite were collected at 6h,12h,24h after operation.Tumor necrosis factor-?(TNF-?)level of serum and ascite were measured by enzyme linked immuno-sorbent assay (ELISA).The expressions of TNF-? mRNA were assessed by RT-PCR analysis.The serum and ascites that had been collected at 24h after development were injected into medium of NRK cell,then the levels of TNF-? secreted by NRK cell were measured after injection 6h,12h,24h,and the cell apoptosis were also evaluated after injection 24h.NRK cell apoptosis were evaluated by flow cytometry (FCM).Results:①The serum and ascites levels of TNF-? were signficantly elevated in SAP groups compared with sham operation groups at any time point(P