ve To explore the methods for sanitary safety test of water purifier. Methods The water purifiers using active carbon, KDF and molecular sieve as absorptive materials and hollow fibers as filter materials were collected for sanitary safety test. The water purifiers were irrigated by pure water continuously for 15, 30, 45 and 60 min respectively first, and then were immersed continuously for 24 h by pure water, the variations of turbid-ity, pH value, total dissolved solid and chemical oxygen demand (COD), etc, of the immersing water were observed. The water purifiers were also irrigated continuously for 1 h at first, and then were immersed continuously for 5, 15, 24, 48, 72 h and 1 week by pure water respectively, in the end, the variations of those 4 sanitary indexes mentioned above were also detected. Results Significant differences were observed in those 4 indexes between the immering water samples obtained after 15 min-irrigation and 30 min-irrigation, 30 min-irrigation and 45 min-irrigation (P

AIM:To establish a method for determining menthol, methyl salicylate,cinnamal dehyde and engenol simultaneously in Baicao Oil by GC. METHODS: A separation was performed on a large bore capillary column(30m?0.53mm) with PEG-20M as the stationary phase of GC.The method was carried out with FID as the detector without split stream sampling.A programmed temperature was employed.Benzyl alcohol was selected as the internal standard substance. RESULTS: An excellent seperation of menthol,methyl salicylate,cinnamal and engenol in Baicao Oil was gained.The good linear relationships of menthol (62.7?10~3-2.01?10~3 ?g/mL),methyl salicylate (119?10~3-3.81?10~3 ?g/mL),cinnamal dehyde (0.42-205 ?g/mL),engenol (19.9-636 ?g/mL) were observed.All correlation coefficients were greater than (0.999 2).The average recovery of menthol,methyl salicylate,cinnamal and engenol were between(98.6%)～100.3%,and RSD was less than 2.4%. CONCLUSION: The method is simple,accurate and suitable for quality control of Baicao Oil.

Objective To investigate the effect of tourniquet compression on axonal transport in sciatic nerve of rats.Methods Twenty-four 12-week old male SD rats weighing 250-300 g were randomly divided into 4groups according to the duration of tourniquet compression(n=6 each):1,2,4 and 12 h.The tourniquet was applied to the middle 1/3 of thigh.In each animal whether the left or right thigh was compressed was determined by a flip of coin.The tourniquet was released for 10 min after every hour of compression.A 3-cm segment of sciatic nerve was removed at the end of tourniquet compression(1.5 cm proximal and 1.5 cm distal to the site of compression).Immuno-histochemistry was used to measure the expression of insulin-like growth factor-1(IGF-1)in the sciatic nerve.The ratio of average optic density of the compressed sciatic nerve to that of control was used to estimate the degree of IGF-1 accumulation.The regression equation of the interaction between the duration of compression and accumulation of IGF-1 was analyzed.Results There was significant accumulation of IGF-1 in the sciatic nerve proximal to the compressed site.The accumulation increased with the duration of compression.There was no significant accumulation of IGF-1 in the sciatic nerve distal to the compressed site.The regression equation of the interaction between the duration of compression(X)and accumulation of IGF-1(Y)was Y=0.422X+0.887.Conclusion Tourniquet compression of sciatic nerve can inhibit axonal transport.The accumulation increases with the duration of compression.

Object To perform detail studies on different species of Ligusticum L (Uumbelliferae) currently prescribing in Yunnan Province for the purpose to clarify the claotic state of its clinical use Methods By literature retrieval, field and market center inspection and pharmacognostic identification in comparison with those documented in classical literatures to arrive at a reasonable evaluation Results Two varieties of Ligusticum L., the Huanggaoben and Heigaoben were currently in common use in Yunnan Province Huanggaoben, the yellow ligusticum, was originated from Sinodielsia yunnanensis Wolff and Ligusticum delavayi Franch Heigaoben, the balck ligusticum, was oringinated from Ligusticum pteridophyllum Franch Conclusion The study may provide references for the further study and clinical use of this medicinal plant

Background Epithelial-mesenchymal transition (EMT) is one of the pathogenesis mechanisms of posterior capule opcification (PCO).Studying EMT is of important significance for the prevention and treatment of PCO.However,EMT model is lack.Objective This study was to establish an in vitro EMT model for the study of human PCO.Methods In vitro mimic cataract enucleation was performed on 40 donor eyes,including anterior capsulorhexis,nucleus hydroexpression,and aspiration of lens fibers.The capsular bag of lens was dissected free during the surgery and pinned flat on a plastic culture dish with DMEM/F12 supplemented containing 10％ fetal bovine serum for 4 weeks.The proliferation of LECs on the capsular bag was observed by phase-contrast and dark-field microscope in 0,3,7,14 and 28 days after culture.The capsular bag tissues were collected in cultured 0,3,7 and 28 days for the preparation of sections and hematoxylin-eosin stain,and the growth and morphology of LECs were examined with optical microscope.The expression and location of α-SMA,E-cadherin and Vimentin were assessed by immunochemistry.The expression levels of α-SMA,E-cadherin and Vimentin mRNA and proteins were detected by using real-time fluorescnce quantitative PCR and Western blot in different time points.Results No LECs were seen on the uncultured capsular bag.LECs appeared in cultured day 3 on the periphery capsular bag and grew toward the center and covered the posterior capsule 7 days after cultured,with a cobblestone-like appearance.Wrinkles occurred and extended gradually along with the enhancement of bag tension.Immunochestry showed that the expression intensity of E-cadherin in the capsular bag gradually weakened,and that of α-SMA or Vimentin was gradually enhanced during the culture duration.The relative expression levels of E-cadherhin mRNA at 0,3,7,14 and 28 days after culture were 3.35±0.13,1.47±0.20,1.13±0.14,1.00±0.85 and 0.23±0.03,and relative expression levels of Vimentin mRNA were 1.00 ± 0.73,1.05 ± 0.14,2.24 ± 0.43,2.84 ± 0.34 and 8.57 ± 0.40,and those of α-SMA mRNA were 1.00 ± 0.06,2.68 ± 0.28,4.24 ± 0.05,2.05 ± 0.90 and 15.30 ± 0.19,showing significant differences among different time points (E-cadherhin mRNA:F =23.430,P =0.000;Vimentin mRNA F =8.915,P =0.002;α-SMA mRNA:F =103.500,P =0.000),with the lowest expression levels in the E-cadherhin mRNA and the highest expression levels in the Vimentin mRNA and α-SMA mRNA at 28 days during the culture period (all at P＜0.01).The gray values of E-cadherin protein expression were 1.443 ± 0.017,1.023 ± 0.003 and 0.568 ± 0.018,and those of Vimentin protein were 0.565±0.012,1.156±0.007 and 1.241±0.009,and those of α-SMA protein were 0.195±0.045,0.693±0.036 and 1.501±0.005 at 0,3 and 28 days,with significnant differences among various time points (E-cadherin:F =2 787.000,P =0.000;Vimentin:F =4 488.000,P =0.000;α-SMA:F =1 173.000,P =0.000).The expression levels were significantly declined in E-cadherhin protein and elevated in Vimentin and α-SMA proteins at 3 and 28 days after culture in comparison with before culture.Conclusions A novel in vitro EMT model of LECs is established in this study.This model can mimic a natural EMT procedure after extracapsular cataract enucleation and therefore is a useful model for the further research of the mechanism and prevention and treatment of PCO.

Objective To investigate the effect of minimally invasive surgery in patients with midge-upper advanced gastric cancer (AGC). Methods 167 patients with middle-upper AGC underwent total gastrectomy+D2 lymph node dissection from January 2009 to December 2013 were enrolled in the study and divided into laparoscopic assisted total gastrectomy (LATG) group (n = 57) and open total gastrectomy (OTG) group (n = 110). Baseline data, operative, postoperative data and follow-up result were compared between the two groups. Results There were no significant differences in baseline data between the two groups (P > 0.05); The intraoperative blood loss and incision length in LATG group were significantly lower than that in OTG group (P < 0.05). There were no significant differences in operation time, ratio of intraoperative blood transfusion, distance between the upper margin and the tumor, the number of lymph node dissection between two groups (P > 0.05); Postoperative first aerofluxus time, ecovery liquid diet time, postoperative hospitalization days and VAS score of pain in 3 d after operation in LATG group were significantly lower than that in OTG group (P < 0.05). There was no significant differences in incidences of postoperative complication between two groups (P > 0.05); There was no patient dying within 30 d after surgery.The median follow-up time was 38.2 months (1~58 months). Postoperative 1, 3 year overall survival rates in LATG group and OTG group were 87.7% and 83.6%, 71.9% and 64.5%, and there were no significant differences between the two groups (P > 0.05). Conclusion For patients with middle-upper AGC, LATG+D2 lymph node dissection has lots of advantages including less intraoperative blood loss, shorter incision, faster postoperative recovery, shorter hospital stay and so on, which is safe and effective, and their short-and long-term results are satisfactory.

Objective To investigate the influence of three kinds of different Ca~(2+) concentration of dialysate on serum calcium,calcium-phosphorus product,serum PTH and CRP in maintenance hemodialysis patients.Methods 45 patients of maintenance hemodialysis with ages ≥18 years were selected.They were divided randomly three groups,and be given three different kinds of Ca~(2+) concentration of dialysate to carry out hemodialysis with 3 months.Then the patients' variation of blood pressure and whether there were low calcium spasm or ostealgia were abserved during hemodialysis whole range.In addition,changes of their serum calcium、phosphorus、iPTH and CRP at pretherapy and three months after reatment were also detected.Results After three months of hemodialysis,serum iPTH in patients with low Ca~(2+) concentration dialysate increased obviously,and the serum CRP decreased significantly(P0.05),and serum CRP increase notably(P

Objective To evaluate the effect of sevoflurane postconditioning on the expression of CCAAT/enhancer-binding protein homologous protein (CHOP) in a rat model of hemorrhagic shock and resuscitation.Methods Thirty-six healthy adult male Sprague-Dawley rats,weighing 300-350 g,were divided into 3 groups (n=12 each) using a random number table:sham operation group (group S),hemorrhagic shock and resuscitation group (group HSR) and sevoflurane postconditioning group (group SP).Hemorrhagic shock was induced by withdrawing 40% of the total blood volume from the right carotid artery over an interval of 30 min,and 1 h later the removed blood was reinfused via the left jugular vein for resuscitation.Group SP inhaled 2.4% sevoflurane for 30 min starting from the onset of reinfusion.Mean arterial pressure was monitored and recorded at a 10 min interval.Before withdrawing blood (T0),immediately after the end of withdrawing blood(T1), at 1 h after the end of withdrawing blood(T2) and immediately after the end of reinfusion (T3),blood samples were collected from the common carotid artery for blood gas analysis.At 4 days after reinfusion,6 rats of each group were selected to detect spatial learning and memory ability by using Morris water maze test.The animals were then sacrificed,brains were removed for determination of neuronal apoptosis in hippocampal CA1 area using TUNEL.The rest 6 rats in each group were sacrificed at 72 h after reinfusion,and the hippocampus was isolated to detect the expression of CHOP by Western blot.Results Compared with group S,mean arterial pressure was significantly decreased,and lactic acid concentrations were increased at T1,2 in HSR and SP groups,and the escape latency was significantly prolonged,the percentage of time staying at the target quadrant was decreased,the number of apoptotic neurons in hippocampal CA1 area was increased,and the expression of CHOP was up-regulated in group HSR (P<0.05).Compared with group HSR,the escape latency was significantly shortened,the percentage of time staying at the target quadrant was increased,the number of apoptotic neurons in hippocampal CA1 area was decreased,and the expression of CHOP was down-regulated in group SP (P<0.05).Conclusion The mechanism by which sevoflurane postconditioning improves cognitive function is related to down-regulation of CHOP expression and inhibition of apoptosis in hippocampal neurons in a rat model of hemorrhagic shock and resuscitation.

Tumor invasion and metastasis are regarded as main reasons for the failure of therpy and the reason of patients death.The mechnism of tumor metastasis is still uncertain.The pre-metastatic niche hypothesis provides us with new ideas to discover the mechnism.Numerous materials are involved in the formation of the pre-metastatic niche according to this hypothesis,including bone marrow-derived cells,microvesicles,exosomes,CD44,and so on.A further research on this hypothesis helps to deeply understand the nature of metastasis and leads clinical doctors to explore novel targets for clinical diagnoses and therapies.

Objective To compare the sedative and analgesic effects of remifentanil combined with propofol administered by target-controlled infusion(TCI)and intravenous infusion during local anesthesia.Methods Sixty ASA Ⅰ or Ⅱ patients,aged 18-55 yr,with body mass index ＜ 30 kg/m2,scheduled for plastic surgery under local anesthesia,were equally and randomly divided into TCI group(group T)and intravenous infusion group (group V).Remifentanil(the initial target plasma concentration 1.0 ng/ml)and propofol(the initial target plasma concentration 1.0 ng/ml)were given by TCI before local anesthesia in group T.Remifentanil was infused at a rate of 0.05 μg·kg-1 ·min-1 after a loading dose of 0.25 μg/kg and propofol was infused at a rate of 3 mg·kg-1 ·h-1 after a loading dose of 0.5 mg/kg in group V.The target plasma concentration or infusion rate was adjusted to maintain the modified OAA/S score of 2 or 3.Hypoxemia,bradypnea and/or apnea were recorded during operation.The total amount of remifentanil and propofol consumed was calculated.Results Compared with group V,the incidence of hypoxemia,bradypnea and/or apnea were significantly decreased during operation,and the total amount of remifentanil and propofol consumed was significantly reduced in group T(P ＜ 0.05).Conclusion The sedative and analgesic effects of remifentanil combined with propofol given by TCI are superior to those given by intravenous infusion during local anesthesia,with better safety.