Objective To study the effect of Qi - Xiong mixture on neurotransmitter in AD rats. Methods Assessments were carried out with diving platform and light - electricity contrasting color. Results As compared with model group,the prevented and treated rats showed longer period of time in getting electric shock ( P

Objective To investigate the retinal pigment epithelium cells(RPE) and makeit the base of clinical application for transplantation.Methods The cultured RPE cells labeled by BrdU was injected into the host's subretinal space by external transcleral.The structure and ultrastructure of the transplanted RPE cells were observed by microscope and transmission electron microscope.Results The transplanted cells had the normal structure as the host's cells.They attached to Bruch's membrane with basal infoldings and forming microvill on the surface of the cells.Conclusion The external transcleral is a practical method for RPE transplatation.The transplanted cells can vitalize and form some normal ultrastrcture.

Objective:To develop an evidence-based nursing program for a patient with oral complications of dysphagia due to cerebral infarction.Methods:According to the principle of PICO, and the problem of patients' clinical manifestations, using the method of combining subject words and free words, the database of Uptodate, NICE, SIGN. RNAO, medical pulse guide network, BMJ, Cochranc library, PubMed, EMbase, CINAHL, China National Knowledge Infrastructure were searched and collected the clinical guidelines, systematic evaluation and randomized controlled trial of oral complications in patients with dysphagia of cerebral infarction.Results:Totally 1 clinical decision, 5 clinical guidelines, 4 expert consensus, 2 systematic evaluations, 1 Meta-analysis, 3 randomized controlled trial (RCT) were included. Based on the search results and the patient′s condition and wishes, nurses performed swallowing function tests every two days according to the Standard Swallowing function rating Scale (SSA), raised the head of the bed 40°~45° and holded it for 1 hour. Three times a day, the teeth were brushed with chlorhexidine oral care solution under negative pressure. Sputum scab was removed by mechanical scrubbing. The back of tongue was scrubbed by 6x tongue scraping technique every night. After the infection was controlled, the teeth were washed twice a day with 0.9% sodium chloride solution. Oral condition and swallowing function were evaluated daily. High flow humidification oxygen therapy and mask spray atomization inhalation were used. Swallowing training was performed on the third day after admission. Seven days after the evidence was applied to clinical practice, the oral mucosa was moist without peculiar smell and sputum scab, and the swallowing function was changed from grade IV to grade II.Conclusion:Nursing cerebral infarction patients with dysphagia, nurses should timely assess the patient's oral cavity and swallowing function, the application of chlorhexidine and 0.9% sodium chloride solution oral care solution mechanical scrubbing method and negative pressure washing brushing method can effectively remove sputum scab, use 6x tongue scraping technology to scrub the back of tongue, can reduce micro organisms, reduce halitosis; the application of nasal mask high flow humidification oxygen therapy and spray atomization inhalation humidification effect is obvious Therefore, early swallowing training can reduce the incidence of oral complications.

Objective:To investigate the relationship between surface hydrogen form and the bioactivity of titanium.Methods:Sandblast titanium was etched with the combination of sulfuric and hydrochloric acids(SLA group,n=3 ).Then etched titanium was heat at 450 ℃in air(SLA+HT group,n=3).Surface topography,roughness,hydrophility,surface chemical texture were observed. Finally,the titanium samples were soaked in body simulate fluid for 3 days,the mineral deposition properties were observed by X-ray diffraction.Results:Titanium hydride was formed on the titanium surface after etching.After heat treatment,surface texture and roughness were not changed,titanium hydride decomposed and hydrophility increased.More hydroxyapatite was found on the surface of the samples treated by SLA+HT and followed by SBF.Conclusion:Titanium hydride can not improve the bioactivity of titanium, heat treatment may increase the mineralization.

Objective To investigate the correlation between the insertion torque values and primary stability of dental implants using different insertion torque values ,and search for the best insertion torque values that can acquire good primary stability. Methods Six male pure beagles were selected, and the first molars and four premolars of bilateral mandibulars were extracted. Three months later, a total of 48 XIVE dental implants were inserted. All implants were divided into group A, group B, group C, and group D based on the insertion torque value (ITV): group A, 0 < ITV < 20Ncm; group B, 20 ≤ ITV < 40Ncm; group C,40Ncm ≤ ITV < 60Ncm;group D,ITV≥60Ncm The dental implant stability was measured by Resonance frequency analysis when implanrs were placed immediately. Results No complications occured.There was significant difference between group A and grop B (P=0.012), group A and grop C (P=0.037), group A and grop D (P=0.001). There are no ignificant difference among group B,group C and grop D(P>0.05). Conclusion With the limitations of the study, it was concluded the primary stability does not simply depend on the insertion torque;When the insertion torque value was no less than 20Ncm, the dental implant can acquire good primary stability.

Aim To study the apoptotic inducing effects of deguelin on SH-SY5Y cells.Methods SH-SY5Y cells were treated with 0,0.625,1.25,2.5,5,10 and 20 μmol·L-1 deguelin for different time(24,48,72 h);cell viability was detected by CCK-8 assay.SH-SY5Y cells were treated with 0,8,20,50 μmol·L-1 deguelin for 24 h;light microscope and AO/EB double stained method were employed for observing the morphology and apoptotic morphology of treated cells.Apoptotic rate of treated cells was determined by flow cytometry.Cells were stained by DCFH-DA,and the whole reactive oxygen species(ROS)was determined by flow cytometry.Spectrophotometry was employed to determine the activation degree of caspase-3.Results Deguelin inhibited cell growth in a time-and dose-dependent manner,and the IC50 value of deguelin was(26.07±2.18),(18.33±0.94),(12.5±1.49)μmol·L-1 when treated with 24,48,72 h respectively.After treated with 8,20,50 μmol·L-1 deguelin for 24 h,cell apoptotic rate,ROS and activation rate of caspase-3 increased markedly(P<0.05),all of which performed a dose related effect.Conclusion Deguelin can inhibit SH-SY5Y cell proliferation and induce cell apoptosis,and the mechanism may be concerned with the elevated ROS and activated caspase-3.

Objective:To analyze the relationship between the clinical medical college students' time investment (including study, activities, entertainment and exercise) and general self-efficacy (GSE) in a medical university in Liaoning province, China.Methods:The first-year medical students were asked to participate the survey. Their GSE was measured by using general self-efficacy scale (GSES) in 2018. One year later, the independent variable table was used to investigate the extracurricular activity time, and 683 valid questionnaires were collected. Ordered logistic regression method was used to analyze the correlation between students' extracurricular activities and GSE.Results:Medical students' GSE was positively associated with their time in extracurricular study ( OR = 1.94, 95%CI = 1.49-2.54), volunteer activities ( OR=1.36, 95%CI = 1.01-1.83), and physical activities ( OR = 1.37, 95%CI = 1.01-1.85). However, there was no significant correlation with the time in activities organized by students ( OR = 1.09, 95%CI = 0.79-1.50) or activities organized by school ( OR = 1.15, 95%CI = 0.84-1.59). Furthermore, compared with clinical students of "5+3" year program, the 5-year program clinical students had a stronger correlation between medical students' GSE and the input of extracurricular study time. Conclusion:There is a positive correlation between medical students' GSE and their extracurricular time investment, which indicates that increasing medical students' GSE could be an effective method to improve their extracurricular time investment and eventually improve their comprehensive quality.

OBJECTIVE:To investigate clinical efficacy and safety of linezolid in the treatment of intracranial infection after neurosurgery operation. METHODS:Medical information of 39 intracranial infection patients receiving linezolid in Xijing Hospital of Air Force Medical University during Jul. 1st,2015-Aug. 29th,2016 were analyzed retrospectively. The clinical efficacy andsafety of linezolid in the treatment of intracranial infection after neurosurgery operation were evaluated according to indexes of intracranial infection patient,such as symptoms,signs,lab indexes test and bacterial culture results. RESULTS:Total response rate of 39 intracranial infection patients after neurosurgery operation was 79.49％ after linezolid treatment. After treatment,the patients' body temperature,white blood cell,neutrophil absolute value,white blood cell in cerebrospinal fluid and cerebrospinal fluid protein level were all significantly lower than before treatment,with statistical significance(P<0.05). Of 39 patients,cerebrospinal fluid of 27 patients were cultured before treatment,and 8 cases(29.6％)of which were positive,among which there were 6 cases (75.0％) of Gram-positive bacteria such as Staphylococcus and Enterococcus. No obvious ADR related to linezolid was found in patients. CONCLUSIONS:Linezolid can effectively control the intracranial infection caused by Gram-positive bacteria such as Staphylococcus and Enterococcus with good safety.

Objective:To investigate the clinical value of radiomics based on computed tomography (CT) examination in preoperative differential diagnosis of pancreatic serous cystadenoma (SCA) and mucinous cystadenoma (MCA).Methods:The retrospective case-control study was conducted. The clinicopathological and imaging data of 154 patients with pancreatic cystic neoplasms who were admitted to the First Affiliated Hospital, Zhejiang University School of Medicine from January 2012 to December 2019 were collected. There were 24 males and 130 females, aged (50±13)years. Of the 154 patients, 99 cases were diagnosed as SCA and 55 cases were diagnosed as MCA. All the 154 patients underwent plain and enhanced CT scan of pancreas before operation. The clinical characteristics, radiology features and radiomics features of all patients were collected to construct the clinical characteristics model, radiology model, radiomics model and fused model. The receiver operating characteristic (ROC) curve of each model was drawn, and those constructed models were evaluated by area under the curve (AUC), accuracy, sensitivity, specificity, positive predictive value and negative predictive value. Based on the optimal model, the nomogram was constructed. Observation indicators: (1) establishment and validation of clinical characteristics model; (2) establishment and validation of radiology model; (3) establishment and validation of radiomics model; (4) establishment and validation of fused model; (5) nomogram of fused model. Measurement data with normal distribution were represented as Mean± SD, and comparison between groups was analyzed using the Mann-Whitney U test. Count data were described as absolute numbers or percentages, and comparison between groups was analyzed using the chi-square test or Fisher exact probability. Results:(1) Establishment and validation of clinical characteristics model: 3 clinical characteristics, including age, symptoms and preoperative serum CA19-9, were selected using multinomial logistic linear regression analysis to construct the clinical characteristics model. Result of the multinomial logistic linear regression analysis was expressed by formula ①: clinical characteristics model score=0.635-0.007×age+0.054×clinical symptoms+0.108×preoperative serum CA19-9. The ROC curve for the test dataset of clinical characteristics model was drawn. The AUC, accuracy, sensitivity, specificity, positive predictive value and negative predictive value of clinical characteristics model were 0.611(95% confidence interval as 0.488?0.734, P<0.05), 56.6%, 66.7%, 56.3%, 41.5%, 78.4% for the training dataset and 0.771(95% confidence interval as 0.624?0.919, P<0.05), 77.8%, 63.1%, 88.5%, 80.1%, 76.7% for the test dataset, respectively. (2) Establishment and validation of radiology model: 5 radiology characteristics, including tumor location, the number of tumors, tumor diameter of cross section, lobulated tumor and polycystic tumor (more than 6), were selected using multinomial logistic linear regression analysis to construct the radiology model. Result of the multinomial logistic linear regression analysis was expressed by formula ②: radiology model score=?0.034+0.300×tumor location+0.202×the number of tumors+0.014×tumor diameter of cross section?0.251×lobulated tumor?0.170×polycystic tumor (more than 6). The ROC curve for the test dataset of radiology model was drawn. The AUC, accuracy, sensitivity, specificity, positive predictive value and negative predictive value of radiology model were 0.862(95% confidence interval as 0.791?0.932, P<0.05), 78.8%, 81.8%, 77.5%, 62.8%, 90.2% for the training dataset and 0.853(95% confidence interval as 0.713?0.994), P<0.05), 88.9%, 89.4%, 88.5%, 85.0%, 92.0% for the test dataset, respectively. (3) Establishment and validation of radiomics model: 4 categories of a total 1 067 radiomics features were extracted from 154 patients with pancreatic cystic neoplasms, including 7 first-order histogram features, 53 texture features, 848 wavelet features and 159 local binary pattern features. A total of 896 stable radiomics features were retained to construct the model, based on the condition of intraclass correlation coefficient >0.9. After selected by variance threshold and correlation coefficient threshold, 350 radiomics features were retained. Fifty synthetic radiomics features were constructed based on the original features in order to obtain potential radiomics features, and the total number of radiomics features was 400. After analyzed by the five-fold recursive feature elimination, 22 radiomics features were screened out, including 13 wavelet features, 7 synthetic radiomics features and 2 local binary pattern features. The support vector machine algorithm was used to construct the radiomics model. The penalty coefficient 'C' and parameter 'γ' of the radiomics model were 35.938 and 0.077, respectively. The kernel function of the radiomics model was 'radial basis function kernel'. The ROC curve of radiomics model using 5-fold cross validation was drawn. The average AUC, accuracy, sensitivity, specificity, positive predictive value and negative predictive value of the radiomics model were 0.870 ( P<0.05), 83.1%, 81.8%, 83.8%, 73.8% and 89.2%, respectively. (4) Establishment and validation of fused model: the fused model was constructed after selecting the tumor location and lobulated tumor of radiology characteristics and radiomics score. Result of the multinomial logistic linear regression analysis was expressed by formula ③: fused model socre=?0.154+0.218×tumor location?0.223×lobulated tumor+0.621×radiomics score. The ROC curve for the test dataset of fused model was drawn. The AUC, accuracy, sensitivity, specificity, positive predictive value and negative predictive value of fused model were 0.893(95% confidence interval as 0.828?0.958, P<0.05), 83.7%, 81.8%, 84.5%, 71.1%, 90.9% for the training dataset and 0.966(95% confidence interval as 0.921?0.999, P<0.05), 91.1%, 84.2%, 96.2%, 94.1%, 89.3% for the test dataset, respectively. (5) Nomogram of fused model: the nomogram of fused model was illustrated with the Youden index of 0.416. Conclusion:The prediction model based on the radiomics signature and radiological features extracted from preoperative CT examination can make the differential diagnosis of pancreatic SCA from MCA.

Objective: To explore the effectiveness of healthy school canteen intervention on nutritional literacy, food consumption, as well as attitude towards school canteen. Methods: A primary school in Taizhou City was selected as the intervention school, and another comparable primary school was selected as the control one. A total of 320 students (163 in the intervention group and 157 in the control group) received a comprehensive intervention based on the construction of a healthy school canteen in the school,incluling healthy dining environment,food impravement,chef training,nutrition and health education, while the control group did not receive any intervention. Questionnaires survey was administered to both groups before and after the intervention. Results: Before the intervention, no significant differences were found in the total scores of skills and nutrition literacy, frequency of food intake, behaviors and attitudes related to canteen construction between the two groups( P >0.05). Daily intake of vegetables, dairy products, fish/poultry/eggs/lean meat increased by 19.63, 15.95 and 19.63 percentage point respectively ( χ 2=15.25，9.14，13.93， P <0.01). The proportion of students reporting have read related intervention materials in the intervention group(95.71%) was higher than the control group(84.71%) ( χ 2= 11.04, P < 0.01 ). The students in favor of low salt, low oil and low sugar dishes in the intervention group (74.85%) was higher than in the control group(48.41%) ( χ 2=23.73, P <0.01). Conclusion Based on the comprehensive intervention of nutrition and health canteens can improve students nutrition literacy and dietary structure. It is recommended to adopt the form of "home school linkage" to carry out the construction of large sample, multi regional and long term nutrition and health canteens.