BACKGROUND:Calcaneal fractures are often accompanied with a height reduction in the calcaneus. Compared to the intra-articular fracture with much specific operation indications, there is no standard to the reduction of calcaneal height that needs a surgery in extra-articular fractures. Therefore, it is necessary to find a more quantitative operation indication. OBJECTIVE:To explore the changes in calcaneus stress distribution along with the varying calcaneal height through finite element analysis. METHODS:A three-dimensional finite element model of the normal ankle was developed. Four finite element models with the calcaneus height decrease in 5, 10, 15 and 20 mm were developed based on the normal ankle model. And the VonMises distribution of the calcaneus, the maximal stress and its location were respectively analyzed. RESULTS AND CONCLUSION:In the normal ankle model, the stress concentration was found in the posterior inner part of the posterior articular surface, the anterior inner part of the posterior articular facet and the calcaneocuboid articular surface. And the maximal stress was 16.608 MPa, which appeared in the posterior inner part of the posterior articular surface. The stress concentration in the calcaneocuboid articular surface disappeared when the calcaneal height decreased, and the maximal stress of the model with the calcaneal height decrease of 5, 10, 15 and 20 mm was 18.325, 19.674, 22.491 and 25.694 MPa, respectively. The results suggest that the VonMises of calcaneus concentrates and increases obviously when the calcaneal height changes. It seems that the calcaneal height should be restored to the normal level. When the reduction of the fracture is difficult, the decrease of the calcaneal height should be limited within 10 mm.

HP450 has thecharacteristic of cytochrome P450 and sensitivity to antihistmine drugs.With distinct raiiable regularity in the diverse disease modes of the rat,and some relativity to the development of liver disease,the expression and transcription of the HP450s gene have all changed in the course of the liver cancer. HP450 is possibly regarded as a new index of diagnosing liver cancer and a new target site of preventing and treating liver cancer

In this paper 100 cases of renal space-occupying lesions which had been examined before operation by sonography and verified by surgery and pathology were analysed retrospectively. Results showed 99 cases of renal space-occupying lesions and 1 case of retroperitoneal tumor. There were 2 eas-es of false negative and 1 case of false positive for the localization by ultrasound.Nephromas were found to be 92.92%(92/99)totally.in which rnalignant and benign tumors were 86.96%(80/92)and 13.04%(12/92)respectively.5 cases of misdiagnosis and 2 cases of pitfall in qualitative analysis were iden-dried by pathology.The rate of accuracy was 92%(92/100).

The IR determination of phospholipid content in Semen Zizyphi Spinosae and Fructus Psoraleae, both of which are tonics,was reported for the first time.In this method,using PC as standard sample, chloroform as solvent and the absorption band of P-O-C bond as measurement wavelength,the ab- sorptive degree was linear for concentration in ranging from 0.6mg/ml to 4.0mg/ml.The standard deviation was 0.0682.CV was 1。69%。Compared with the result obtained by colorimetric assay, this method was simpler,its result was more stable.

Objective:To study the soft tissue inflammation of percutaneous implants using bacteria investigation method, so as to provide basic data for further clinical study of percutaneous implants. Methods: Implants were surgically placed into tibias of the goats. The inflammatory secretion from the peri-implant soft tissue was taken to perform bacteria test on 4, 6 and 9 weeks post-operation. Meanwhile, the soft tissue inflammatory reaction was also observed weekly. Results: 5 of the 16 implants were infected. The soft tissue showed tumefaction and ulceration 2 months post-surgery. As to bacteria investigation, the number of G.Streptococci increased when the inflammation was getting more severe. Conclusion: The extent of the soft tissue inflammation of percutaneous implants probably has positive correlation with the infection of G.Streptococci.

A method for the infrared spectrophotometric determination of total ph-ospholipids in seed of Juglans regia and acinus of Citrullus vulgaris was reported. The average recovery of total phospholipid in this test was 97.2%, the CV was 1.66%. The contents of total phospholipid in seed of Juglans regia and acinus of Citrullus vulgaris were 438.46-528.85mg% and 241.78 -247.47mg% respectively. The rapid quantitative analysis of the distribution of various phospholipid components in these two specimens was carried out by using thin layer chromatographic scanning and the corrective method of absorbance proportional coefficient. The results showed that the main phospholipid components in both specimens were PC and PE. The fatty acid composition of the total phospholipids of both specimens were analysed by GC-MS-DS (gas chromatography-mass spectrometry-data system).

Objective To assess the prediction value of Pmax and Pd on idiopathic paroxysmal atrial fibrillation(IPAF) and the possible mechanism of amiodrone preventing the recurrence of IPAF.Methods Pmax and Pd were measured in 60 patients with IPAF and 60 healthy control subjects by 12-lead surface electrocardiography. 30 of patients with IPAF were assigned to treatment with amiodrone for 6 months. Pd?Pmax and recurrence of IPAF were observed and compared with control group during the treatment.Results Pmax and Pd were found to be significantly higher in patients with IPAF than in healthy subjects[(126?17)ms vs(102?11)ms; (50?9)vs(29?8)ms,P

Objective: To analyse the composition and content of the fatty acid and unsaponifiable matters in both tartary buckwheat seed oil and buckwheat seed oil. Methods: Fatty acids were obtained by the methods of KOH-EtOH(95%) saponification and treatment of inorganic acid. They were analyzed and determined by gas chromatography and GC/MS chromatography respectively. Results: 4-5 kinds of fatty acid were determined in both oils, and the content of unsaturated fatty acids in tatary buckwheat oil was 83.2% ( oleic acid 47.1%, linoleic acid 36.1%), buckwheat oil was 81.8% ( oleic acid 35.8% , linoleic acid 40.2% and linolenic acid 5.8%). The content of unsaponifiable matters in tartary buckwheat seed oil was 6.56%(?-sitosterol 54.37%), and in buckwheat seed oil was 21.90%(?-sitosterol 57.29%,?-tocopherol 1.41%). Conclusion: Both buckwheat oils were functional vegetable oils.

Purpose:To study the mutual relationships between apoptosis,cell proliferation correlative gene PCNA and tumor suppressor gene P27 Kip1 as well as to investigate if they have something to do with the occurrence,development,and prognosis in esophagus squamous cell carcinoma.Methods:47 cases of primary esophagus squamous cell carcinoma were put into investigative group whose tumor samples from operation resection were studied. 20 cases with normal esophagus cell mucous membrane tissue were put into the control group. Expression level of PCNA,P27 Kip1 was detected by immunohistochemistry method (S-ABC) in both groups. Apoptotic index was detected by TdT mediated deoxyuridylic acid(dUMP)nicking end labeling (TUNEL method) in both groups.Results:①In the group of 47 cases of esophagus squamous cell carcinoma,there were 17 cases of positive expression in P27 Kip1 ,and the positive rate was 36.17% , average proliferation index(PI) was 45.86?19.11%,average apoptotic index is 1.05%?0.59%,ratio of PI/AI is 57.37? 45.17 ,all of which were statistically significant for difference between normal tissue and carcinoma in esophagus squamous cell (P

Objective:To study the feasibility of repair of partial maxillary defect by distraction osteogenesis(DO) in zygoma.Methods:Segmental maxilla- zygoma defect was made in 3 dogs. A submerged DO distractor was anchoraged on the zygoma and maxilla across the defect,the zygoma was distracted with a rate of 1.0 mm/d for ten days,the process of bone formation was examined by X-ray.Results:All dogs were in health condition within the experimental period.New bone formation was observed 2~4 weeks after operation. Complete repair of the defects was observed 8 weeks after the completion of distraction.Conclusion:The partial maxillary defect may be repaired by DO in zygoma.