Electromagnetic Fields ; adverse effects ; Humans ; Radiologic Health

Object To study the technological conditions of refining ?-linolenic acid by short-path distillation (SPD). Methods According to the characteristic of SPD, the effect of the operating parameters, such as the distillation temperature, the system pressure, the feeding rate, and the agitating speed, were studied on the purity of ?-linolenic acid. Results The appropriate process conditions for the purification of ?-linolenic acid by SPD are: distillation temperature 90 ℃—120 ℃, pressure 0.3 Pa, feeding temperature 60 ℃, feeding rate 90—100 mL/h, and rotating speed 150 r/min. Conclusion Refining ?-linolenic acid by SPD is a simple and convenient method. It is easy to achieve industrialization.

Objective:To establish a system for quantitatively measuring alveolar bone density and to test its precision and validity. Methods: With the aid of computer technique, the system measured the average gray level intensity of regions of interest (ROIs) on standardized exposed direct digital periapical radiograph. To correct the variation resulting from exposure condition, an aluminum stepwedge was exposed simultaneously. By referring the image of aluminum stepwedge on each radiograph the equivalent aluminum thickness(EAT)and corrected gray level intensity(CGL)of the ROIs could be calculated as indicators of alveolar bone density. Nineteen specimens containing different amounts of hydroxy-phosphorite were radiographed. The precision of the system was tested by repeatedly measuring 2 of the specimens. The set of specimens was exposed under two different exposure time in order to test the system's validity to correct the gray level difference caused by different exposure time. Results: After repeated measurement of specimens, we found the Relative Standard Deviation(RSD) of EAT and CGL was between 0.83%-2.15%; At the level of 95%, if the difference of EAT between the two ROIs was larger than 0.05 mm or the difference of CGL was larger than 3, the content of hydroxy-phosphorite in them was different; The two sets of data during different exposure time were processed with Wilcoxon Signed Ranks Test, and the result showed effective correction of the variation caused by different exposure time. Conclusion:The precision and validity of the quantitative alveolar bone density measuring system are acceptable. The system can be used to compare alveolar bone density longitudinally and cross-sectionally.

Objective:To explore the influencing factors on patients' health seeking behavior in rural China by employing the theory of planned action.Methods:Data from cross-sectional household-based health survey carried out in 2008 were used in the study.Correlations between outcomes and explanatory variables were studied by Logistic regression.Results:The studying population included 19 389 adult patients over the age of 15.Illness awareness,medical experience and structural restriction factors had strong effect on whether the patients chose medical service.Pepople in different socioeconomical status suffered different influences.Conclusion:Responding to the changing trend of health service demand among rural residents,we should recognize the differentiation and allocate the healthcare resources more rationally.

At present,in the opinions of the domestic and foreign scholars,the only hope of long-term survival even cure of hilar cholangiocarcinoma was obtained by radical resection(ie R0 resection).The application of preoperative assessment with appropriate and comprehensive strategies can judge the respectability and Intraoperative safety accurately to the tumor,thereby it can improve the radical resection rate and safety of patients with hilar cholangiocarcinoma.In this paper,preoperative assessment strategies are reviewed.

Objective To analyse the relationship between the diagnosis of disseminated intravascular coagulation(DIC) and the level of Thrombomodumin(TM),thrombin-antithrombin(TAT) and D-dimer in plasma from 67 patients with disseminated intravascular coagulation(DIC).Methods The levels of TM,TAT and D-dimer were measured by a two antibody sandwich enzyme linked immunosorbent assay and a latex aggregation assay.Results The levels of TM,TAT and D-dimer in plasma of patients with DIC were higher than those in control group(P

Objective The clinical effect of Allitride as disinfectant in infective root canal of deciduous teeth was studied. Methods 40 teeth were put into the cotton thist with Allitride juice in root canals,sealed by zno for a week. FC CP were used in the contrast groups with consist of 38 teeth. Results The effect of 24 teeth in the Allitride group were excellent, 13 teeth were benign, The efficiency was 92 percent. In CP group, 8 teeth were excellent, 5 teeth were benign, The efficiency was 72 percent. 11 excellent effect and 7 benign effect were in FC group. The efficiency was 90 percent. There are significant difference between Allitrade group and GP group(P0.05). The Allitride effect have not significant relation with age, tooth position.Conclusions Allitride is a good disinfectant adapt to infective root canal of deciduous teeth.

Objective To observe the clinical cure effect of Zhilong Tongluo Decoction on chronic obstructive pulmonary disease in acute exacerbation(AECOPD). [Method] Take prospective research method to randomly divide 70 cases of AECOPD into 2 groups, the control one(35 cases) take routine western medicine(WM) for treatment, the treatment group(35), added with Zhilong Tongluo Decoction on the basis of control one. After being treated for 14d, compare their PH value, PaO2, PaCO2, HCT, ESR, CRP and clinical effect and side effects before and after treatment. [Result] The comparison of both groups had no difference of statistical meaning on PH,PaO2,PaCO2,HCT,ESR,CRP; after treatment, the PH and PaO 2 markedly increased, PaCO2 obviously decreased(P<0.05), so did HCT,ESR,CRP(P<0.05,P<0.01); the treatment group was much better than control one on improvement, so was the effective rate. Both had no marked side effects. [Conclusion] Zhilong Tongluo Decoction controls inflammation and improves ventilation and blood flow with its Tongluo(stretch col aterals), having obvious effect on AECOPD.

[Objective]To evaluate the application of sonographic measurements of the thickness of transverse carpal ligaments in CTS(carpal tunnel syndrome) patients.[Methods]Fifty-two wrists from 40 patients with CTS confirmed by surgery and 32 wrists from 20 healthy individuals(control group) underwent sonographic examination of the thickness of transverse carpal ligaments at the level of pisiform bone and the hook of the hamate bone in transverse plane by the same operator.[Results]The thickness of transverse carpal ligaments in CTS patients was(0.41?0.10) cm at hamate hook level and(0.35?0.11) cm at pisiform level versus(0.28?0.11) cm and(0.20?0.08) cm in the control group.There was significant difference in the mean value of thickness of transverse carpal ligaments hetween the two groups at the two levels.[Conclusion]Ultrasonography examination of the thickness of transverse carpal ligaments is a new and valuable technique in the diagnosis of carpal tunnel syndrome and is much helpful to choose operation methods.

0.05), and there was significant differences in the negative score of PANSS (t=6.13, P