One hundred and fifty to one hundred and eighty days after an intraperitoneal injection of diethynitrosamine to mice, the activity of r-GT in the liver and small intestine of the mice was found to have increased significantly, which suggests the occurrence of cancerous degeneration of the cells of the 2 organs. No significant change of r-GT activity was found in the lungs and stomach.

BACKGROUND: Disturbance of lipid metabolism is responsible for many kinds of diseases, and to screen safe and effective prescription for lipid reduction has clinical significance.OBJECTIVE: To study the influence of puerarin-arginine composition on lipid metabolism in rats.DESIGN: Comparative observing study based on animal model.SETTING: Experimental animal center and department of biochemistry in a military hospital of Chinese PLA.MATERIALS: This study was carried out at the Experimental Animal Center and Department of Biochemistry of the General Military Hospital of Chinese PLA between May and August 2004. Eighty Wistar rats were randomly divided into high dosage, middle dosage, low dosage group and control group with 10 male and 10 female rats each.METHODS: Rats took food freely, and experimental groups were supplemented with puerarine-arginine composition of different dosage (0, 0.93,1.39 and 1.85 g/kg) for observing the influence on rats.MAIN OUTCOME MEASURES:① blood parameters; ② change of body mass and utilization rate of food; ③ parameters of vital organs;④histopathological changes.RESULTS: From onset of the second week, body mass of both male and female rats in experimental groups were found obviously lower than those in control group. The levels of blood cholesterol in female rats were(1.63 ±0.20) and (1.29 ±0.23) mmol/L in 0.93 g/kg dosage group and control group respectively, and were(1.75 ±0. 13) and(1.31 ±0. 19) mmol/L in male rats,and both have statistical significance( F = 6.43, 6. 58, P ＜ 0. 05).Fatty parameters of the three experimental groups were found obviously lower as comparing with those of control group.CONCLUSION: Such composition has been proved to be able to exert function in lipid reduction by decreasing body mass, and improving utilization rate of food and proportion of cholesterol and organic fat.

OBJECTIVETo investigate the noise hazards in open quarries and to provide a basis for further control of noise hazards.

METHODSAn investigation was performed during 2010 to 2011 among all open quarries in Deqing County of Zhejiang Province, China. The investigation included basic information of the quarries, the occupational health situation and noise intensity at the workplace, and the hearing loss of workers exposed to noise in quarry enterprises. The hearing test results were evaluated based on the Diagnostic criteria of occupational noise-induced hearing loss (GBZ 49-2007).

RESULTSA total of 25 enterprises with open quarries were investigated, of which only 30.4% (17/56) workplaces met the national standard. The median noise level was 92.5 dB (A). Fifty-four (10.6%) out of 508 workers in the 25 enterprises were diagnosed with binaural hearing loss in the initial physical examination, with 18.3% (93/508) under surveillance. The rate of normal hearing among crushing workers, mechanists, drilling workers, and blasting workers ranged between 27.6% and 41.4%, which was significantly lower than that among workers exposed to slight noise hazards (80.0%) or other workers (63.7%) (P < 0.05). With increasing working years, the binaural hearing loss of crushing workers became serious.

CONCLUSIONSerious occupational noise hazards existed in most jobs in open quarries, with crushing workers, mechanists, drilling workers, and blasting workers most seriously jeopardized. Among crushing workers, those working in the first-line or unprotected second?line positions suffered more than the others. Further measures should be taken by the supervision department and the enterprises to control the noise hazards in open quarries.

The back of rats was immersed in 95℃ water for 10 seconds to produce 10% and 30% TBSA full thickness burn injury. Malondialdehyde (MDA) level in plasma, erythrocytes, the liver and the lungs, the activity of superoxide dismutase (SOD), glutathione peroxidase (GSSG-Px), and catalase (CAT) in the blood, liver and lungs, and the activity of liver xanthine oxidase (XO) were determined 4 hours postburn. It was found that MDA level and SOD activity in rat tissues, XO and CAT activity in the liver, and GSSG-Px activity in the lungs and blood increased significantly aftfe injury. The severity of these changes positively correlated with the area of scalding except the SOD activity in the liver and lungs which showed no significant difference in those animals with 10% and 30% TBSA scalding. However the CAT activity in the blood and lungs decreased postburn and the liver GSSG-Px activity in 10% and 30%TBSA scalding-injured rats was higher and lower than that of the control respectively.The results imply that when scalding involves less area of body surface, the function of anti-peroxidation system of the body will be enhanced by inducing the synthesis of antioxidases; when severe scalding covers larger body surface, the induction of enzyme synthesis will be deficient in some tissues of the body.

Objective To study the effects of motor imagery therapy on functional performance of upper ex- tremity in stroke patients.Methods Sixty cases of stroke were divided into a treatment group(n=30) and a con- trol group(n=30).The control group was treated with routine rehabilitation training,while the treatment group was treated with motor imagery therapy in addition to the routine rehabilitation training.The Fugl-Meyer Assessment (FMA),upper extremity function test(UEFT)and simple test for evaluating hand function(STEF)were used to as- sess the upper extremity function before and after six months of treatment.Results After treatment,patients in both groups scored significantly better with the FMA scales,UEFT scales and STEF scales when compared to their scores obtained before the treatment(P

BACKGROUND: Continuous oxygen inhalation of high concentration may improve antioxidase and simultaneously injure the lung in rats.OBJECTIVE: To observe the effect of intermittent high concentration oxygen on antioxidase activity and pulmonary tissue in rats.DESIGN: Complete randomized control experiment.SETTING: Department of Geriatric Cardiology and Department of Biochemistry, General Hospital of Chinese PLA. MATERIALS: The experiment was performed in Department of Hyperbaric Oxygen of Navy General Hospital and Department of Biochemistry of General Hospital of Chinese PLA from January 2002 to May 2002, in which, 10 healthy Wister rats were employed, mass weighted varied from 200 to 250 g, of either sex and randomized into two groups, 5 rats in each.METHODS: In the control, the rats were bred in the room environment for 7 days. In hyperoxic preconditioning (HP) group, the rats were placed in hyperbaric oxygen chamber and inhaled oxygen of 80％ to 85％ (101. 325 kPa) everyday for 6 hours, continuously for 7 days. At the end of experiment, the lung was collected to measure lung wet mass. 0.4 g pulmonary tissue was collected to prepare homogenate in freezing bath and its upper clear solution was collected to determine the activities of superoxide dismutase (SOD), glutathione peroxidase (GTTP) and catalase with chemiluminescence method successively. Pulmonary tissue was fixed with 30 g/L glutaradldehyde and prepared into sections to be observed the microstructure of lung under electron microscope.MAIN OUTCOME MEASURES: ① Comparison of lung wet mass and activities of SOD, glutathione peroxidase and catalase in pulmonary tissue in two groups. ② Alternation on microstructure of pulmonary tissue.RESULTS: Ten rats were all entered result analysis. ① Activities of SOD,GTTP and catalase in pulmonary tissue: Those in HP group were all higher remarkably than the control [(185.10±1.92) ％/g, (90.50±4.17) nkat/g,(4.38±0.18) k/g; (95.15±1.43) ％/g, (20.17±2.17) nkat/g, (1.10±0.19) K/g,t= -84.016, -33.488, -28.023, P ＜ 0.01]. ② Lung wet mass: That in HP group was near to the control [(1.32±0.07), (1.30±0.03) g, P ＞ 0.05], explaining that the fluid in the lung of HP group was not increased. ③ Microstructure of pulmonary tissue: In HP group, the basement membrane of pulmonary tissue was integrative and thickness was even, vascular endothelial cell was integrative and Ⅰ-type epithelial cell was not destroyed.CONCLUSION: Intermittent high concentration oxygen improves antioxidase activity in the lung of rat and does not injure the lung obviously.

Otoneurological operations were performed in 96 patients through the retrosigmoidal approach. The anatomical structures in the cerebello-pontine angle can be clearly exposed with this procedure. The approach has the advantage that it is of convenience in manipulation with only gentle trauma, and that some drawbacks of suboccipital or retrolabyrimhine approach may be overcome. On the other hand, operation indications can be extended and operation complications reduced. It is an ideal approach which enters the cerebello-pontine angle. The surgical technique and clinical experience have been reported in detail in this paper.

Objective To contrastively analyze the performance of two kinds of blood cell separators for apheresis platelets . Methods 80 blood donors were selected from 4 234 healthy apheresis platelet donors and their data before and after apheresis platelets were respectively collected by using two kinds of different blood cell separators Trima and Amicus .The product quality during the collection process ,residual WBC and RBC count ,acquisition time ,collection efficiency ,scrapping situation and safety were performed the comparative analysis between the two kinds of blood cell separator .Results In the case of the difference of the basic parameters before apheresis platelet having no statistical significance ,the two kinds of blood cell separator had no differences in the aspects of product quality ,processing blood amount and the use amount of anticoagulants(P>0 .05);but there were statisti‐cal differences in the aspects of acquisition time ,collection efficiency and pipeline residual blood amount (P<0 .05) .Conclusion Two kinds of blood cell separators have their own advantages and disadvantages during the use process ,so the blood cell separator should be selected according to the physical quality and their own characteristics of blood donors .

Objective Serological characteristic analysis for patients with autoimmune hemolytic anemia(AIHA)who has cold and warm auto‐antibody when undergoing blood type and cross‐matching .Methods Choosed 3 donors of red blood cells of group O to absorb autoantibodies of the patient′s serum(by using the methods of cold absorption) and used 2‐mercaptoethanol(2‐Me) to de‐stroyed the IgM antibody .Results The patient of AIHA blood type was B+ .There was cold and warm auto‐antibody in the pa‐tient′s serum ,and the result of cross‐matching is incompatible .Conclusion The patient′s serum contains cold and warm auto‐anti‐body which interferes blood type and cross‐matching .In emergency ,considering the patients condition ,blood transfusion combined with the drug treatment could achieve good effects .