OBJECTIVE To study the antimicrobial activity of antimicrobial plastics and its depressing effect to biofilm on the plastics′s surface. METHODS Test tube dilution method was adopted to study the antimicrobial activity and spectrum of antimicrobial plastics. Plate live bacterial recording method and scanning electron microscope(SEM) were introduced to study the formation of biofilm. RESULTS Wide inhibiting spectrum to pathogenic microbe such as Pseudomonas aeruginosa,Staphylococcus aureus,and Escherichia coli was confirmed,and the biofilm was formed after four stages,ie deposit,adhesion,propagation and biofilm formation,and propagation of microbe was found to be inhibited greatly in the surface of antimicrobial plastics,so that the formation of biofilm in the surface of antimicrobial plastics was held back,and the observation of SEM also confirmed that no biofilm was formed in the antimicrobial plastics′s surface. CONCLUSIONS Antimicrobial plastics could inhibit pathogenic microbe remarkably with wide inhibiting spectrum,and it could also depress the formation of biofilm in the surface,which indicated that it is a promising approach to prevent catheter related infections by adopting antimicrobial catheters.

OBJECTIVE To investigate the inhibiting effect of Pingyangmycin on cultured vein endothelial cells in vitro and illustrate the mechanism of Pingyangmycin on treatment cavernous hemangioma of head and neck. METHODS By MTT assay,the inhibiting rates of cultured Ecv-304 cells which were managed with Pingyangmycin for 24h and 48h were compared respectively. The changes in the cell cycle,apoptosis,and Caspase 3 protein expression of the cells managed with Pingyangcin for 24h were examined by flow cytometry(FCM). RESULTS The results showed that the inhibiting rate of Ecv-304 was dependent on the concentration of Pingyangmycin. However,in the same concentration,the inhibiting effect for 24h was stronger than that for 48h. The percentage of G1 phase cells increased while the S phase decreased,but the percentage of G2 phase cells remained unchanged after managed with Pingyangcin for 24h. An apoptosis peak appeared before G1 phase. The apoptosis rate was also concentration-dependant. The expression of caspase 3 increased in every group of different concentration. CONCLUSION Pingyangmycin can possibly arrest the growth of Ecv-304 in the G1 phase through the mechanism of inducing apoptosis. Caspase 3 may play an important role in the induced apoptosis.

OBJECTIVE:To investigate the effects of glutamine on neurological and gastrointestinal function of severe organo-phosphate poisoning patients. METHODS:46 patients with severe organic phosphorus poisoning in our hospital were enrolled and ran-domly divided into control group and observation group,with 23 cases in each group. Control group was given antidote atropine,en-ergy recovery agent pralidoxime chloride,blood perfusion and other symptomatic treatment. Observation group was additionally given Glutamine dipeptide injection 0.5 g/kg,ivgtt,qd,on the basis of control group. Both groups received the treatment for consecutive 3 d. The time of poisoning symptom disappearance,the time of blood cholinesterase recovery,hospitalization time,neurological and gastrointestinal function indexes were compared between 2 groups. RESULTS:The time of poisoning symptom disappearance,the time of blood cholinesterase recovery and hospitalization time of observation group were significantly shorter than those of control group,with statistical significance (P<0.05). After treatment,serum diamine oxidase and lactulose/mannitol of observation group were significantly lower than those of control group,while the serum content of citrulline was higher than in control group,with sta-tistical significance (P<0.05). After treatment,MCV and SCV of observation group were significantly higher than those of control group,while F wave latency was significantly shorter than control group,with statistical significance(P<0.05). CONCLUSIONS:Glutamine dipeptide is helpful to promote remission,improve gastrointestinal and neurological function.

Objective:To explore the relationship between development of social skills and executive function and theory of mind in children and adolescents with autism.Methods:Forty-six children and adolescents with autism aged 6 to 17 years were recruited.The diagnosis was made according to the Diagnostic and Statistical Manual of Mental Disorder,Fourth Edition(DSM-Ⅳ),and severe mental disorders were excluded by the screening of the Schedule for Affective Disorders and Schizophrenia for School-Age children (K-SADS).The Rey Complex Figure Test (RCFT),Trail-Making Test,Verbal Fluency Test,Stroop Color-word Task,the First-Order Belief Test and the Second-Order Belief Test were used to assess executive function and theory of mind,and Social Response Scale (SRS) was used to assess social skills.The correlation between results of Executive Function and SRS was analyzed.The SRS scores between groups passing and without passing of First-Order Belief Test and Second-Order Belief were compared.Results:In the aspect of Executive Function,RCFT scores were positively correlated with autistic behavior factor score of SRS (r =0.31-0.41,Ps ＜ 0.05),meanwhile,immediate recall structure scores of RCFT were positively correlated with social motivation factor scores of SRS (r =0.30,P ＜ 0.05),delayed recall structure scores of RCFT were positively correlated with SRS total scores(r =0.34,P ＜ 0.05).In Stroop Colorword Task,errors of the first task were positively correlated with social cognitive factor scores of SRS (r =0.32,P ＜ 0.05).There were no correlation between other Executive Function results and SRS scores (r =-0.21-0.24,Ps ≥0.05).In the aspect of Theory of Mind,there was no significant difference in SRS scores between groups passing or without passing (t =-0.68-1.73,Ps ≥ 0.05).Conclusion:The development of social skill in children and adolescents with autism may have relationship withexecutive function,but have no relationship with the theory of mind.

Objective:Colorectal cancer screening was performed on a general population with age ranging between 40 and 74 years old to evaluate the screening effects of questionnaire survey, fecal occult blood (FOB) test, and colonoscopy, as well as to provide some implications of colorectal cancer screening strategies. Methods: Two-step screening model of questionnaire survey combined with FOB test was applied for the screening. Colonoscopy was conducted in a high-risk population identified through preliminary screening as final diagnosis. Results:Based on the 2,117,304 cases screened, the screening compliance was 39.72%, and 126,118 cases (5.96%) were identified as high risk. Colonoscopies were performed on 25,837 cases, of which 8,095, 1,236, 134, 112, and 336 were identified as adenoma, advanced adenoma, severe dysplasia lesions, early cancer, and advanced cancer, respectively. The early stage di-agnostic rate was 81.52%. Conclusion:The colorectal cancer screening method performed in Tianjin can significantly concentrate on the high-risk population with colorectal cancer, increase the positivity rate of total colonoscopy, and economize medical resources.

Objective To study the impact of preoperative nutritional support on the clinical outcomes in patients with malnutrition who underwent transcatheter arterial chemoembolization (TACE) for hepatocellular carcinoma.Methods 46 patients with malnutrition underwent TACE after operation for primary liver cancer were randomly divided into the experimental group (n =23) and the control group (n =23).The patients in the experimental group received preoperative nutritional support,but patients in the control group did not receive preoperative nutrition support.The preoperative and postoperative nutritional status,the incidences of postoperative complication,the liver function,the lengths of hospital stay,the costs of nutrition support and the costs of hospitalization were compared between the two groups.Results On the day before the operation,on postoperative day 1,day 7,and one month,the levels of serum albumin,and on the postoperative day 7 and one month,the levels of pre-albumin were significantly higher in the experimental group than in the control group,and the differences were significantly different [(38.4 ± 1.5) g/L vs.(32.8±0.8) g/L,(37.6±1.3) g/Lvs.(31.4±0.9) g/L,(39.0±1.6) g/L vs.(32.0±0.7) g/L,(39.8±2.2) g/L vs.(33.0±2.0) g/L,respectively,P＜0.05],[(160.0±14.6) mg/L vs.(131.0 ± 16.5) mg/L,(163.0 ± 17.7) mg/L vs.(135.0 ± 17.1) mg/L,respectively,P ＜0.05].The incidences of complication were significantly lower in the experimental group than that of the control group (52.2％ vs.91.3％,P ＜0.05).The length of hospital stay in the experimental group was shorter than that of the control group [(19.9 ± 2.0) d vs.(24.8 ± 2.7) d,P ＜ 0.05].The cost in the experimental group was significantly lower than that in the control group [(20 108.9 ± 1 142.4) yuan vs.(23 174.1 ± 1 128.5) yuan,P ＜ 0.05].The cost in nutrition support in the experimental group was similar to that of the control group (P ＞ 0.05).Conclusions Preoperative nutritional support was helpful in reducing the incidence of postoperative complications,in shortening the length of hospital stay and in reducing medical costs.Nutritional support improved the nutritional status of the patients with primary hepatocellular carcinoma after surgery and TACE.

Objective To determine the trend of emergency department (ED)mortality of a tertiary general hospital from 2004 to 2014 in order to find the factors that may impact on ED mortality.Methods Mortality in ED was estimated according to the ratio of ED visiting patients to ED deaths.And the data of all ED deaths in 2004,2009 and 2014 were collected.Variance analysis and chi-square test were used for data analysis.Results During the past decade,ED visiting patients was increased significantly by 38.0% in 2014,compared with those in 2004,and the mortality was also increased accordingly from 0.7% in 2004, to 0.9% in 2009,to 1.2% in 2014 (P <0.01).Finally,a total of 1,091 deaths occurred in these three years were included for further evaluation.There were no significant changes in average age and gender distribution,and the average age was 61.9 and the male /female ratio was 1.36∶1 during past decade.The number of adults under 40 years old (18 -39)increased from 7.5% in 2004,to 10.6% in 2009,to 14.4% in 2014 (P <0.05).Both the facilities were upgraded and the number of staffs in ED increased markedly.The cardiovascular illness,cerebrovascular diseases,and sudden death were the leading causes of ED death during past decade.The incidences of trauma and tumor remained unchanged.Average time consumed from onset of illness to arrival to ED didn’t vary significantly during past decade.The study showed no changes in use of ambulance,but remarkable increases in number of non-compliant patients or their family from 18.3% in 2004,to 25.6% in 2009,to 38.3% in 2014 (P <0.01).The percentage of patients in the night time was higher,but there were no significant changes in number of emergency patients in the night time and during holidays in the past decade,but the mean ED stay time increased obviously from 22.4 h in 2004 to 53.3 h in 2014 (P <0.05 ).Conclusions During the past decade,although ED facilities and number of staffs have been improved apparently,ED mortality rate still keeps on escalating. The increase in ED mortality rate may be related to the severely ill patients presenting to ED,the obvious decrease in compliance of patients and the prolonged ED stay time.

Algorithms ; Carrier Proteins ; chemistry ; Crystallography, X-Ray ; Humans ; Magnetic Resonance Spectroscopy ; Molecular Dynamics Simulation ; Nuclear Proteins ; chemistry ; Principal Component Analysis ; Protein Structure, Tertiary ; Proteins ; chemistry ; Scattering, Small Angle ; X-Ray Diffraction ; methods

Objective To discuss the clinical value of IL-6 combined with CA125 and HE4 as a new association marker in the diagnosis of early ovarian cancer.Methods The expression of IL-6, CA125 and HE4 in 21 cases of early ovarian cancer (stageⅠ-Ⅱ), 36 cases of advanced ovarian cancer (stageⅢ-Ⅳ), 40 cases of benign ovarian tumor and 40 healthy women were measured by the Roche automatic chemiluminescence analyzer (electrochemiluminescence).The sensitⅣity, specificity, positive predictive value, negative predictive value and ROC curves were used to evaluate the diagnostic value.Results The serum levels of IL-6, CA125 and HE4 in patients with ovarian cancer were significantly higher than those in the benign ovarian tumor and the healthy control (P＜0.05).The sensitⅣity, specificity, positive predictive value and negative predictive value of IL-6 combined with CA125 and HE4 were respectively 85.7％, 90％, 81.8％, 92.3％in the diagnosis of early ovarian cancer (stageⅠ-Ⅱ) patients and respectively 94.4％, 97.5％, 97.1％and 95.1％for advanced ovarian cancer (stageⅢ-Ⅳ) patients.For IL-6 combined with CA125 and HE4, the ROC AUC was respectively 0.955 4 and 0.974 0 for early ovarian cancer (stageⅠ-Ⅱ) patients and advanced ovarian cancer (stageⅢ-Ⅳ) patients.It performed significantly better than any single test of IL-6, CA125 and HE4 and the 2-marker combination of CA125+HE4.Conclusion The marker panel, IL-6, CA125 and HE4, shows higher sensitⅣity, positive predictive value and ROC AUC.It is an ideal serum marker combination for the diagnosis of early ovarian cancer (stageⅠ-Ⅱ) patients, which can improve the diagnostic efficiency of early ovarian cancer.

Objective To design water-equivalent plastic scintillator detector for the measurement of absorbed dose in tumor radiotherapy.Methods The concentration of ZrO2to be doped in polystyrene was estimated according to the empirical formula,and then the Monte Carlo program Geant 4(GEometry And Tracking 4)was used to simulate the energy deposition and transport process of X-rays with different energies in water,solid water RW34(composed of 2.1 wt％TiO2doping polystyrene)and different concentrations of ZrO2particles doped in polystyrene.The dose and attenuation coefficients were compared among different materials at different depths of water.Results The doses at different depths and the attenuation coefficient of polystyrene(doped with about 0.4 wt％ZrO2nanoparticles)were much more consistent with those of water and even exhibit much better water-equivalence than RW34.Conclusions The simulation results provide the basis for the development of water-equivalent scintillator.