Objective To evaluate the genotoxicity of the organic extracts in the fishpond water containing the sewage. Methods Healthy Kunming mice were randomly divided into 6 groups according to the body weight, 8 mice in each group. The mice were treated with organic extracts through intraperitoneal injection at the doses of 25 L/kg, 12.5 L/kg, 6.25 L/kg, 3.125 L/kg water sample respectively for 3 consecutive days. Genotoxicity induced by organic extracts from the fishpond water containing the sewage was detected by the mice bone marrow micronucleus test and un-fluorescent staining comet assay of mice peripheral blood lymphocytes. Results The frequencies of the micronuclei in PCE cells of mice in the 25 L/kg and 12.5 L/kg groups of the sample were significantly higher than those of the negative control group(P

Aim To develop a sensitive, rapid and ac-curate LC-MSn method for determination of midazolam/1′-hydroxymidazolam and their pharmacokinetic char-acteristics in rat brain. Methods SD rats received in-travenous injection of midazolam ( 5 mg · kg-1 ) via femoral vein, a probe drug of cytochrome P450 3A. The microdialysis ( MD ) samples in situ brain were collected every 8 mins at 2. 0μl·min-1 in 2. 4 hours. Analytes in brain dialysate were quantified by the pro-posed LC-MSn method. Gradient elution was performed on an Agilent Eclipse Plus-C18 column ( 2 . 1 × 50 mm, 3. 5 μm). The mobile phase consisted of 2 mmol ·L-1 ammonium acetate and acetonitrile. The analyte was detected using electrospray ionization ( ESI ) in multiple reaction monitoring ( MRM) modes. The reac-tion selected ions were 326 . 1/291 . 1 m/z for midazo-lam, 342. 1/324. 1 m/z for 1′-hydroxymidazolam and 285. 1/154. 0 m/z for diazepam as internal standard. Result The linear ranges of midazolam and 1′-hydroxymidazolam were 0 . 78~100 and 0 . 195 ~12 . 5μg·L-1 respectively. The lower limit of quantification was 0 . 2 μg · L-1 . The RSD of intra- and inter-batch precisions was less than 7 %. The RSD of accuracy was from -1 . 34 to -8 %. Conclusion This sensi-tive and rapid LC-MSn method is suitable for determi-nation of midazolam/1′-hydroxymidazolam in rat brain dialysate. MD combined with LC-MSn method may give assistance to deep and further studies of drug metabo-lism and CYP3A enzyme in brain.

OBJECTIVE: To establish and a method for determination of allicin and the fingerprints of intravenous emulsion containing garlic oil. METHODS:GC method was applied to determine allicin in preparation and the fingerprints of intravenous emulsion containing garlic oil. The separation was performed on HP-5 (30 m?320 ?m?0.25 ?m) column with the flow rate of 1.0 mL?min-1 and inlet temperature of 250 ℃. The column temperature was 60～220 ℃ and rose by temperature-programmed method with N2 as carrier gas. The temperature of FID detector was 300 ℃ with furan as internal standard. RESULTS: The linear ranges of allicin were 0.05～2.4 mg?mL-1(r=0.999 8). The average recovery were 102.5% (RSD=0.41%,n=9). There were 17 mutual peaks in the fingerprints of intravenous emulsion containing garlic oil. The RSD of intra-day relative retention time and relative peak area were less than 0.05% and 8% respectively. After preparation setting for 48 h at room temperature, the RSD of relative retention time and relative peak areas were less than 0.08% and 15% respectively. The RSD of them in the replicate test were less than 0.04% and 8%, respectively. CONCLUSION: The method is accurate, reliable, simple and available for quality control of intravenous emulsion containing garlic oil

Objective To understand the genotoxicity of organic extracts (OEs) of fishpond water containing sewage.Methods Male Kunming mice were randomly divided into different groups according to the body weight,6 in each group.The OEs were administrated to the mice through peritoneal injection at the doses of 25.00 L/kg,12.50 L/kg and 6.25 L/kg respectively for 3 consecutive days.The negative and positive control groups were treated with DMSO and cyclophosphamide (CP) respectively.The DNA damage was tested by using un-fluorescent staining comet assay.Results The tailed-cells rates and tail length in each OEs treated group were significantly higher than those in the negative control group (P

Objective To improve the diagnosis and treatment of renal inflammatory pseudotumor (RIP). Methods 10 cases of RIP treated from 1970 to 1999 were reviewed and the diagnosis and treatment were discussed. Results The main clinical manifestation of RIP were fever,lumbago and hematuria.6 of 10 underwent nephrectomy because of the suspicion of kidney cancer whereas the other 4 were cured by antibiotics without recurrence on following up for 1～5 years. Conclusions RIP is rare,the diagnosis being based on clinical symptoms together with dynamic B ultrasound and CT scan.Needle biopsy is indicated to establish the diagnosis if necessary.Antibiotics is usually effective.

Objective The transgenic Atractylodes macrocephala resistance to Rhizoctonia solani was obtained by gene engineering. Methods On the base of the efficient regeneration system of Baizhu via shoot organogenesis, the rice chitinase gene (RCH10) and the alfalfa ?-1, 3-glucanase gene (AGLU) were tandem-inserted into the transformation vector pB101, which was transformed into A. macrocephala with gene gun. Transformants were confirmed by PCR, GUS assay, and disease resistant. Results Twenty-five independent transformants possessed desired genes were observed by PCR detection, and among them five transformants exhibiting resistance to Rhizoctonia solani. Conclusion The disease resistant variety has been obtained by transformation, which provides a shorten avenue for the direct introduction of novel traits into A. macrocephala through genetic engineering without the need for numerous back-crossing in breeding programs that slow down cultivar improvement, meanwhile it improves disease resistant gene pool.

Since the beginning of 973 plans and major scientific research programs,the ministry of science and technology has organized the implementation of a number of major projects under the principle guidance of top-level design,co-ordinate arrangements,advantage integration and dynamic adjustment.Prominent advance of technology and expansion of innovation capacity has become possible with the success of those major projects.As a dominant force of basic science research,universities took part in the designing and implementing of most of 973 major scientific research programs.In this paper,participating universities,such as Peking University,Tsinghua University,Fudan University,Zhejiang University,Shanghai Jiaotong University,University of Science and Technology of China,Nanjing University,were analyzed in their roles played in those projects,and the questions of how universities should make the adjustment to their planning and management to meet the requirements of future national research programs were discussed.

Acute Disease ; Animals ; Charcoal ; therapeutic use ; Enema ; Milk ; Paraquat ; toxicity

Objective:To optimize the extraction process of Hegan Lidan granules. Methods:In order to choose the optimal tech-nological parameters, the content of baicalin was determined by HPLC. An orthogonal method was utilized with solvent volume, extrac-tion time and extraction times as the impacting factors and the content of baicalin and extraction rate as the indices. Results:The opti-mal parameters were as follows:using 8-fold water as the solvent, the raw material was extracted three times with 2 h for each. Con-clusion:The process is steady and feasible, and can be used in the extraction of Hegan Lidan granules.

Objective To observe the clinical effect of modified Zhisou powder and Symbicort Turbuhaler simultaneously on patients with Cough Variant Asthma. Methods 120 patients with Cough Variant Asthma were randomly recurited into two groups. 60 patients in the treatment group were treated with modified Zhisou powder and Symbicort Turbuhaler; 60 patients in the control group were treated with Symbicort Turbuhaler. 4 weeks was a therapeutic course in both group. Results The markedly controlled rate (MCR) (clinical control+excenence)of the treatment group was 83.3%, obviously surpassed the control group (70.0%) (P＜0.05); There was obvious improvement of cough, expectoration, breath lessness and throaty pruritus after the therapy in both groups, but it was much better in the treatment group than the control group(P＜0.05). The pulmonary function was significantly improved after treatment in both groups(FEV1, FEV1% and PEF, P＜0.05). The improvement showed significant difference between the two groups(P＜0.05). There was obvious decrease of EOS, IL-5 and ECP in both groups. The decrease of ECP and IL-5 in the treatment group was greater than the control group(P＜0.01). Conclusion The therapy of modified Zhisou powder and Symbicort Turbuhaler has advantage over pure western therapy.