OBJECTIVE:To establish an HPLC method for the assaying of silybin in Gantai capsule.METHODS:The assay was performed on Diamonsil C18 column.The mobile phase consisted of potassium dihydrogen phosphate solution-methanol(45:55)with a flow rate at 1.0ml/min,detection wavelength at 288nm,column temperature at(25?2)℃.The sample size was 20?l and the internal standard was kaempferol.RESULTS:There was a good linear relationship within the concentration range of 0.126～1.26 mg/ml(r=0.9 998)for silybin.The average recovery was 102.9%(RSD=1.50%).CONCLUSION:The method was simple,accurate and reproducible,and suitable for the assaying of silybin in Gantai capsule.

This study sought to evaluate the effect of steep pulsed electric fields (SPEFs) on the immune response of Wistar mice inoculated with Walker256 sarcoma. Thirty mice were randomly divided into three groups: control group (group A, inoculated with Walker256 sarcoma, not treated), treatment group (group B, inoculated with Walker256 sarcoma, treated by SPEFs), and normal control group (group C, inoculated with normal saline, not treated). Tumor size was measured before and every 3 days after treatment by vernier caliper. MTT methods were used to assess the lymphocytes proliferation and the natural killer (NK) cells activity. TNF-a activity was measured by ELISA. Statistical analysis was performed utilizing the SPSS10.0 software package. The experiment results revealed that tumor growth was significantly inhibited in group B as compared with group A (P < 0.01), and that lymphocytes proliferation, NK cells activity and TNF-a activity in group B were not significantly different from those in group C (P = 0.953, P = 0.130, P = 0.080, respectively) but markedly higher than those in group A (P < 0.05). The results also showed that SPEFs could not only kill tumor cells but also induce antitumor immune response and improve the immune function of the host efficiently.
Animals ; Carcinoma 256, Walker ; immunology ; pathology ; therapy ; Electromagnetic Fields ; Female ; Killer Cells, Natural ; immunology ; Leukocytes ; immunology ; Lymphocyte Activation ; Male ; Mice ; Neoplasm Transplantation ; Pulse ; Random Allocation ; Spleen ; cytology ; Tumor Necrosis Factor-alpha ; biosynthesis

Objective:To investigate the current situation of children′s awareness of disaster prevention and self-rescue ability in Mianyang area, provide reference for the development of scientific training programs on children′s disaster knowledge, and improve children′s survival ability during the disaster occurence.Methods:Through literature review and expert consultation, the questionnaire was designed by ourselves.Multi-stage sampling method was used to investigate 2 162 cases from county (city) high school, junior high school and primary school in Mianyang area.Results:8.3% of children had weak disaster awareness.Children had a good understanding of disaster related knowledge, with the highest alarm call awareness rate of 91.8%, fire, flood, earthquake escape and earthquake warning score of 86.5%, 84.2%, 84.2%, 83.0%.Cardiopulmonary resuscitation and fire hydrant operation awareness rate was very low (58.8%, 57.4%). Even some children still chose improper escape behavior.The scores of early warning knowledge and first aid skill were correlated with gender and age.In knowledge of disaster precursors, using of fire extinguishers and hydrants, and first aid skills, the scores of boys were significantly higher than those of girls ( P<0.001). Except for fire-related knowledge, gas leakage escape and shelter awareness rate, the older the children were, the higher the scores were ( P<0.05). The scores of early warning, escape knowledge and first aid skills were correlated with the location of home, and the differences were significant ( P>0.001). More than 80.0% of children chose flashlights, food and water, and emergency kits, while 65.0% to 75.0% children thought it was not necessary to prepare a radio, telephone directory, and cash. Conclusion:Children′s awareness of disaster reduction and self-rescue ability are generally good, but there are still insufficient first-aid skills and improper choice of escape behavior.The education of disaster awareness and self-rescue ability should be strengthened in children′s basic education so as to reduce the casualties of children caused by disasters.