OBJECTIVE: To observe the effects of ginkgolide (GL) on the cerebral blood flow in dogs. METHODS: Dogs anesthetized with sodium pentobarbital were randomly divided into 5 groups, with 4 dogs in each group. Ginkgolide of 4.86, 14.6 and 43.7 mg/kg and Xingling Granule of 0.22 g/kg were administered by gavage to the dogs in each of 4 groups. The dogs in the other group were administered with edible oil (1 ml/kg) as control group. The cerebral blood flow, systolic blood pressure, diastolic blood pressure, mean arterial blood pressure and electro-cardiogram of the dogs were measured at different times after the administration. RESULTS: Ginkgolide of 4.86, 14.6 and 43.7 mg/kg had no obvious effects on the blood pressure and the heart rate. Ginkgolide of 14.6 and 43.7 mg/kg increased the cerebral blood flow 90 minutes after administration, and ginkgolide of 43.7 mg/kg obviously decreased the cerebral vascular resistance 150 minutes after administration. CONCLUSION: Ginkgolide can increase the cerebral blood flow and decrease the cerebral vascular resistance, and it has no obvious effects on blood pressure and heart rate in dogs.

AIM: To study the therapeutical effects of salvianolic acid B (Sal B) on myocardial infarction(MI) in dogs. METHODS : The models of myocardial infarction were produced by ligation of the left anterior descending (LAD) coronary artery in the anaesthetized dogs. The extent of myocardial ischemia was detected by epicardial-electrocardiogram and the extent of infarction was determhled by N-BT staining method. The parameter of lactate dehydrogenase was determined in the serums of dogs. RESULTS : It was indicated that the adminstration of Sal B(1、3 and 10mg/kg) by the way of intravenous injection reduced the extent of myocardial infarction (N-ST) ( P

BACKGROUND: The upward attack of drug-heat is a special type of syndromes of coexistence of cold and heat, it influence the treatment and conversion of the primary disease.OBJECTIVE: To investigate the pathophysiological basis of upward attack of drug-heat.DESIGN: A randomized and controlled observation. SETTING: Department of Traditional Chinese Medicine (TCM) of the People' s Central Hospital of Huizhou City.PARTICIPANTS: Totally 427 patients with cold syndrome, visiting on Department of TCM of the People's Central Hospital of Huizhou City from January 1996 to December 2001, were given warm-heat remedy. Among them 66 cases, 30 males and 36 females, got upward attack of drug-heat during the process of treatment were enrolled. All these subjects, according to their visiting order, at a ratio of 2:1, were chosen as treatment group (44 cases) and control group (22 cases).METHODS: For the patients in treatment group: Rhubarb 6 g was added boiling water 100 mL and soaked for 8 minutes, then the soaking solution was given to the patients, once a day, for 3 days successively. For patients in control group: Table salt 6 g was added boiling water 100 mL for soaking for 8 minutes, after the salt was completely dissolved, the solution was given to the patients, once a day for 3 days successively. The patients of the two groups were at the same time given remedy to treat cold syndrome. The changes of free triiodothyronine (FT3), free thyronine (FT4), high sensitizing thyroid-stimulating hormone (HS-TSH) and cortisol of the patients were detected before and after administration of warm-heat remedy, before and after medication with rhubarb. MAIN OUTCOME MEASURES: ① The changes of the relevant hormones of the patients with upward attack of drug-heat before and after ad ministration of warm-heat remedy. ② The changes of the relevant hormones of the patients with upward attack of drug-heat before and after ad ministration of rhubarb. ③ Comparison of the therapeutic effects in the two groups.RESULTS: All 66 patients involved entered the final result analysis. ①The changes of the relevant hormones of the patients with upward attack of drug-heat before and after administration of warm-heat remedy: FT3 and FT4 were decreased as compared with those before treatment [(2.51±1.20),(6.50±2.30); (10.01±3.21), (15.50±6.31) pmol/L], but HS-TSH and cortisol were increased as compared with those before treatment [(8.25 ±3.75),(4.11±1.75) mU/L; (0.56±0.17), (0.43±0.10) μmol/L]. ② The changes of the relevant hormones of the patients with upward attack of drug-heat before and after administration of rhubarb: FT3 and FT4 ywere increased as compared with those before treatment[(4.71 ±1.56), (2.45±1.25); (14.21 ±4.61),(10.21±3.52) pmol/L], but HS-TSH and cortisol were decreased as compared with those before treatment [(6.24±2.25), (8.35±3.51) mU/L; (0.48±0.10),(0.60±0.17) μmol/L]. ③ Comparison of the therapeutic effects in the two groups: The rate of excellenly effect in treatment group was obviously higher than that in control group (33%, 5%).CONCLUSION: The pathophysiological basis of upward attack of drug heat is stress state of the body, the secretions of the pituitary-thyroid axis play a role of physiological protection, the adrenocortical function is hyperactive, and rhubarb can control this stress state through inhibiting the metabolism of the body.

Objective To establish a method for determining VOCs in drinking water by headspace gas chromatography. Methods VOCs in the water were extracted by headspace technology, then analyzed with Rtx-WAX capillary column, in the same time, VOCs was determined with GC by controlling the temperature and the speed of nitrogen. The retention time of the peaks was used for qualitative analysis, external standard method was used for quantitative analysis. Results The linear ranges of dichloromethane, benzene, toluene, 1, 2-dichloroethane, ethylbenzene, p-xylene, m-xylene, o-xylene, isopropylbenzene, chlorobenzene, styrene were 6.2-311.2, 2.0-100.0, 1.6-81.5, 5.7-282.8, 1.9-93.4, 1.7～85.4, 1.7-87.2, 2.1-103.2, 1.5-76.3, 2.2-107.3 and 1.9-96.0 ?g/L respectively. The lowest determination limit were 0.5-5.9 ?g/L, the rate of recovery were 88.8%-109.6% and RSDs were 2.2%-5.9%. Conclusion This method is simple, rapid, sensitive and can efficiently separate and accurately determine 11 kinds of VOCs in drinking water.

Objective To analyze correlation between female HIV prevalence and policy resources invested for the prevention of mother-tochild transmission(PMTCT).Methods Local policy documents concerning PMCTC published in different periods of time were collected from 4 HIV endemic counties in China,and their main components were analyzed in terms of their correlation with the recent infection rate in local women in general and single and married women of child bearing age in particular.Results The policy resources invested for PMTCT by the county governments had a logarithmic correlation with the female HIV infection rates.Conclusion With the rise of female HIV infection rates,policy resources invested for PMTCT has been increased,but after a rapid increase,recent female HIV infection has exerted little influence on the investment of policy resources.

Objective To establish a method for simultaneous determination of kelthane and pyrethroid pesticide residues in water.Methods Kelthane and pyrethroid pesticide residues in the water were extracted by liquid-liquid,then analyzed with DB-1 capillary column.In the same time,they were determined with GC by controlling the temperature.Retention time of the peaks was used for qualitative analysis,while external standard method was used for quantitative analysis.Results The linear ranges of Kelthane,Bifenthrin,Fenpropanate,Lambda cyhalothrin,Permethrin,Beta cyfluthrin,Alphacypermethrin,Fenvalerate were 0.24-31.1,0.21-27.2,0.20-26.0,0.21-26.5,0.20-25.7,0.21-26.4,0.22-29.0 and 0.22-27.4 ?g/L,r≥0.999 0.The lowest determination limits were 0.20,0.33,0.30,0.13,0.36,0.26,0.33 and 0.30 ?g/L,the rate of recovery was 86.0%-111.7% and RSD was 3.8%-11.8%.Conclusion This method can separate efficiently and determine 8 kinds of pyrethroid pesticide residues in the water and only needs 23 minutes.It's simple,rapid and sensitive.

Objective To establish a test method of dichloromethane,1,1-dichloroethylene,1,2-dichloroethylene,1,2-dichloroethane in drinking water with headspace gas chromatography.Methods Halogenated alkane hydrocarbon in the water was extracted by headspace technique,then analyzed with DB-624 capillary column.In the same time,determined with GC by controlling the temperature.Retention time of the peaks was used for qualitative analysis,while external standard method was used for quantitative analysis.Results The linear ranges for dichloromethane,1,1-dichloroethylene,1,2-dichloroethylene,trans-1,2-dichloroethylene,1,2-dichloroethane were 0.85-168,0.07-12.1,0.40-77.8,0.53-119 and 1.2-265 ?g/L respectively,the determination limits were 0.83,0.07,0.40,0.53 and 1.10?g/L respectively,r≥0.999 5,the rate of recovery were 102.5%-113.8%,and RSDs were 5.5%-11.8%.Conclusion This method is simple,rapid and sensitive,can efficiently separate and accurately determine 5 kinds of halogenated alkane hydrocarbon in the water and only takes 5.2 minutes.

Objective To establish the method of acetaldehyde and acraldehyde in water with headspace gas chromatography. Methods Acetaldehyde and acraldehyde in the water samples were extracted by headspace technology,then analyzed with DB-624 capillary column. In the same time,they were determined with GC by controlling the temperature. Retention time of the peaks was used for qualitative analysis,while external standard method was used for quantitative analysis. Results In 3.0-250 ?g/L, the regression equation for acetaldehyde was y=406.83 x+0.847,r=0.999 9,the lowest detection limit was 1.0 ?g/L. In 6.2-500 ?g/L, the regression equation for acraldehyde was y=207.53 x-0.450,r=0.999 8,the lowest detection limit was 3.3 ?g/L. The rates of recovery were 90.0%-95.5%,and RSDs were 2.1%-3.7%. Conclusion This method is simple,rapid,sensitive and is applicable to the determination of acetaldehyde and acraldehyde in water.

Objective To develop a method of determining benzene hydrocarbon and halogenated alkane hydrocarbon in the air of workplaces with the capillary gas chromatography of carbon disulphide desorption. Methods Benzene hydrocarbon and halogenated alkane hydrocarbon in the air of workplace were collected by active carbon sampling cuvette, then separated by hydrogen flames detector gas chromatography machine after carbon disulphide desorption. Benzene hydrocarbon and halogenated alkane hydrocarbon were determined quantitively by retention time and quantitatively by apex area. Results The linear ranges of benzene, toluene, p-xylene, m-xylene, o-xylene, ethyl benzene, styenl, chlorobenzene, acetone, carbontetrachloride, dichloromethanl, trichloromethane, 1, 2-dichloroethane, naphth alene were 0.019-81.600, 0.018-91.200, 0.018-88.800, 0.018-56.8, 0.011-92.000, 0.012-63.200, 0.018-93.200, 0.449-2298.400, 0.252-1287.000 and 0.076-390.000 mg/m3 respectively. The recovery rates were 88.4%-98.6% and RSD were 1.0%-6.0%. Conclusion This method can separate efficiently and determine accurately benzene hydrocarbon and halogenated alkane hydrocarbon in the air with a good precision. It is suitable for the determination of the toxicants in the air.

Objective To study epicanthus anatomy in cadavers in order to explore a more ideal technique for the correction of epicanthus. Methods On the basis of epicanthus anatomic dissection in 6 adult cadavers, canthoplasty and a new fixation technique for correcting epicanthus was performed clinically in the following procedures: incising the epicanthal fold and partial inner canthus ligament, pulling the new canthus medially and fixing it on the lateral nasal aponeurosis. Results Anatomic dissection showed that the epicanthus was caused by malposition of the orbicularis oculi muscule. More than 200 patients with epicanthus had been operated on by this technique and 165 of them were available for postoperative follow up for 6 months to 4 years with better cosmetic results. Conclusions This technique has less tissue damage and more favorable postoperative scar. It is a simple and reliable surgical approach for correction of epicanthus.