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To investigate whether chronic bacterial prostatitis (CBP) increases oxidative stress and damage in patients with CBP, and to explore its possible mechanism.Eighty patients with CBP and 80 healthy adults as controls were enrolled in a case-control study, in which levels of nitric oxide (NO), vitamin C (VC), and vitamin E (VE) in plasma, as well as malondialdehyde (MDA), activities of superoxide dismutase (SOD), and catalase (CAT) in erythrocytes were determined by spectrophotometry.Compared with the average values of NO, VC, VE, MDA, SOD, and CAT in the healthy control group, those of plasma NO and erythrocyte MDA in the CBP group were significantly increased (P0.001), and those of plasma VC and VE as well as erythrocyte SOD and CAT in the CBP group were significantly decreased (P0.001). Findings from partial correlation analysis for course of the disease and NO, VC, VE, MDA, SOD, and CAT in 80 patients with CBP, adjusted for age, suggested that with prolonged course of the disease, values of NO and MDA were gradually increased (P0.001), and those of VC, VE, SOD, and CAT were gradually decreased (P0.05-0.001). The findings from stepwise regression analysis for course of the disease and NO, VC, VE, MDA, SOD, and CAT in CBP group suggested that the model of stepwise regression was Y = -19.1160 + 0.3112MDA + 0.0337NO, F = 22.1734, P0.001, r = 0.6045, P0.001. The findings from the reliability analysis for VC, VE, SOD, CAT, NO, and MDA in the CBP group showed that the reliability coefficients' alpha (6 items) was 0.7195, P0.0001, and the standardized item alpha was 0.9307, P0.0001.There exist increased oxidative stress and damage induced by chronic bacterial prostatitis in patients, and such a phenomenon is closely related to the course of disease.

The development of a fieldbus based electro-hydraulic converter with functions of non-sensor fault self-diagnostic, fault prediction, fault-tolerant and fault self-removing is described. Non-sensor fault self-diagnostic and fault prediction were implemented through the detection of an oscillation current. The current was selected as the criterion of jam fault. Redundancy construction was adopted to realize the fault-tolerant function. Also, the switching principle of the redundancy construction was discussed. A concept of “electrical hammer” was presented to resolve the jam fault on-line automatically. A CEBus based powerline communication network was developed to fulfill the communication demands of field devices which are normally interconnected by “low voltage” wiring. The effectiveness of the proposed converter was demonstrated through simulations and experiments. It was concluded that the converter has a promising future in engineering applications, especially in turbine governing systems that suffer from jam fault. Keywords : Fault diagnostic, fault predict, fault tolerant, fault self-removing, fieldbus, electro-hydraulic, non-sensor

To evaluate the effect of decoction for invigorating the kidney and improving blood circulation to thrombosis on rabbits blood stasis model.Thirty rabbits were randomly divided into normal group, model group, heavy dose group, slight dose group and xue shuan ning group. Tissue-type plasminogen activator (t-PA), plasminogen activator inhibitor (PAI), fibrinogen (Fbg) and D-dimer (DD) were investigated after those rabbits had been treated. One was selected randomly from each group to observe pathological changes.There was significant difference in t-PA, PAI, Fbg and DD between normal group and other groups (P0.01). Among groups of heavy dose, slight dose, xue shuan ning and model, the statistical differences were significant, as well as among groups of heavy dose, slight dose and xue shuan ning (P0.05). However, there was no statistical difference between heavy dose group and slight dose group (P0.05). The pathological changes in model group were most serious, and those in xue shuan ning were less serious. There were slight pathological change in heavy dose group and light dose group.Models were made successfully. Heavy dose group and slight dose group have stronger effect on thrombosis than xue shuan ning group.

To evaluate the effects of Yi-Shen-Huo-Xue Fang on expression of GMP-140 and cleaning out the oxygenic free radicle on rabbits blood stasis model.Thirty rabbits were divided randomly into five groups as the normal group, model group, large dose of "Yi-Shen-Huo-Xue Fang" group, small dose of "Yi-Shen-Huo-Xue Fang" group and "Xue-Shuan-Xin-Mai-Ning" group. After being treated respectively, granule membrane protein 140(GMP-140), erythrocyte sueroxide dismutase (E-SOD), erythrocyte lipid peroxide(E-LPO), plasma lipid peroxide(P-LPO) were checked up.The GMP-140, E-SOD, E-LPO, P-LPO in normal control were compared with those in model groups, With the difference(P0.01), model control group was compared with large dose group and small dose group (P0.01), with "Xue-Shuan-Xin-Mai-Ning" group(P0.05), large dose group was compared with "Xue-Shuan-Xin-Mai-Ning" group(P0.05), and large dose group were compared with small dose group (P0.05).The model was made successfully. Large dose group, small dose group and "xue-shuan-xin-mai-ning" group can inhibit expression of GMP-140, enhence SOD activity and decrease LPO content on blood stasis rabbit model. Large dose group and small dose group have stronger effect than "xue-shuan-xin-mai-ning" group.

AIM To investigate the potential oxidative stress in children with chronic constipation and to explore its mechanisms. METHODS Seventy children with chronic constipation and 70 age- and sex-matched healthy children were enrolled in a randomized controlled study. Plasma levels of vitamins C and E, activities of superoxide dismutase and catalase and lipoperoxide level in erythrocytes were determined by spectrophotometry. RESULTS Compared with healthy children whose vitamin C, vitamin E, superoxide dismutase, catalase and lipoperoxide were 58.35+/-14.42 micromol/L, 27.15+/-6.55 micromol/L, 2 206+/-171 U/(g.Hb), 327.3+/-82.2 K/(g.Hb) and 19.18+/-4.27 nmol/(g.Hb) respectively, the levels of vitamin C, vitamin E, the activity of superoxide dismutase, and catalase in the children with chronic constipation significantly decreased [46.59+/-11.51 micromol/L, 20.65+/-4.80 micromol/L, 1943+/-147 U/(g.Hb) and 269.3+/-67.8 K/(g.Hb), respectively P