Objective:To evaluate the importance of the items on dynamic behavior investigation in the expert interview for Air Force′s psychological selection of flying cadets, so as to provide the basis of optimization and improvement of expert interview platform for the selection.Methods:Flying cadet selection experts were asked to fill in the Importance Rating Scale of Items in the Psychological Selection for Flying Cadets. The content included: ①importance ranking of items; ②importance score of each item; ③capability factors investigated by each item. A descriptive analysis of the evaluation results taken from flying cadet selection experts was performed with statistical analysis software SPSS 23.0. Results:A total of 49 flying cadet selection experts participated in this evaluation, and the average time of their participation in the recruitment was 2.73 years. Imitation exercise was considered as the most important item, with the importance score of 9.04±1.58, and the difference was statistically significant as compared with other items ( P<0.01). From the evaluation results of experts, the capability factors of imitation exercise investigated included imitation, memory, acceptance, reaction, etc.. Conclusions:Most experts have reached a consensus that imitation exercise is the most important item in dynamic behavior investigation, and it is a comprehensive investigation item that can simultaneously examine many capability factors such as imitation, memory, acceptance, and reaction. The optimization and improvement of the interview platform of the psychological selection for flying cadets can focus on imitation exercise, and overcome the main problems of the expert interview platform by applying new technologies.

Objective:To evaluate the importance of the items on dynamic behavior investigation in the expert interview for Air Force′s psychological selection of flying cadets, so as to provide the basis of optimization and improvement of expert interview platform for the selection.Methods:Flying cadet selection experts were asked to fill in the Importance Rating Scale of Items in the Psychological Selection for Flying Cadets. The content included: ①importance ranking of items; ②importance score of each item; ③capability factors investigated by each item. A descriptive analysis of the evaluation results taken from flying cadet selection experts was performed with statistical analysis software SPSS 23.0. Results:A total of 49 flying cadet selection experts participated in this evaluation, and the average time of their participation in the recruitment was 2.73 years. Imitation exercise was considered as the most important item, with the importance score of 9.04±1.58, and the difference was statistically significant as compared with other items ( P<0.01). From the evaluation results of experts, the capability factors of imitation exercise investigated included imitation, memory, acceptance, reaction, etc.. Conclusions:Most experts have reached a consensus that imitation exercise is the most important item in dynamic behavior investigation, and it is a comprehensive investigation item that can simultaneously examine many capability factors such as imitation, memory, acceptance, and reaction. The optimization and improvement of the interview platform of the psychological selection for flying cadets can focus on imitation exercise, and overcome the main problems of the expert interview platform by applying new technologies.

Free radicals are the intermediates of metabolism,widely exist in the human bodies.Under normal circumstances,the free radicals play an important role in the metabolic process on human body,cell signal pathway,gene regulation,induction of cell proliferation and apoptosis,so as to maintain the normal growth and development of human body and to inhibit the growth of bacteria,virus and cancer.However,when organic lesion occurs affected by external factors or when equilibrium of the free radicals is tipped in the human body,the free radicals will respond integratedly with lipids,protein or nucleic acid which may jeopardize the health of human bodies.This paper summarizes the research progress of the free radicals conducted in recent years,in relations to the perspective of the types,origins,test methods of the free radicals and their relationship with human's health.In addition,the possible mechanisms of environmental pollutants (such as polycyclic aromatic hydrocarbons) mediating oxidative stress and free radicals scavenging in the body were also summarized.

Objective To investigate the brain glucose metabolism with 18 F?FDG microPET/CT in mouse models of intracerebral hemorrhage (ICH). Methods A total of 12 healthy adult male mice were randomly divided into sham operation group (group A, n=6) and ICH model group (group B, n=6) by simple random sampling method. The animal models were established by injecting collagenase Ⅳ into the caudate nucleus of mice. Thereafter (5.5±0.3) MBq of 18F?FDG was injected into caudal vein at 6 h, 24 h, 48 h and 3 d, 5 d, 8 d, 14 d, respectively, following anesthesia. 18 F?FDG microPET/CT scans were ac?quired 30 min after the trace injection. SUV in the perihematomal brain tissue of ICH was measured and an?alyzed. Two?sample t test was used to compare SUV between groups. Results ( 1) Some mice had mild neurologic deficit after the sham operation in group A, while all mice had a marked neurologic deficit in group B, especially at 24 h after 18 F?FDG injection. ( 2) After 6 h, FDG uptake in perihematomal brain tis?sue decreased(SUV=0.80±0.04), which significantly lower than that in the opposite side(SUV=1.10± 0?04;t=2.69, P<0.05) and decreased to the minimum at 24 h(SUV=0.50±0.05). 18F?FDG uptake in perihematomal brain tissue began to increase at 3 d(SUV=1.20±0.05) and kept increasing during the 14 d observation. Compared with the group A, glucose metabolism in group B was significantly lower at each time point(t=37.67-86.60, all P<0.05). Conclusions 18 F?FDG microPET/CT may dynamically reflect the changes of brain glucose metabolism in ICH mouse models. The FDG uptake in the center of ICH may disap?pear and the volume of hematoma with decreased uptake may shrink during the observation period.

Objective To explore the value of the variation of clinical pulmonary infection score (CPIS) and serum procalcitonin (PCT) in diagnosis and treatment evaluation in patients suffering from active pulmonary tuberculosis with complication of ventilator-associated pneumonia (VAP).Methods A retrospective analysis was carried out in 58 VAP patients from June 1,2009 to December 30,2014 in the respiratory intensive care unit.According to the patient suffering from tuberculosis or not,patients were divided into two groups.The PCT and CPIS score changes were observed in the two groups of patients with intra-tracheal intubation 1,3 and 7 days after VAP onset.Comparisons of CPIS and PCT scores were carried out between two groups at different intervals after VAP onset.Data were statistically processed by SPSS 19.0.Count data were tested by x2,and measurement data were expressed by mean ± standard deviation (x-±s).The comparison within the groups was made by t test,whereas the comparison between the groups was by means of repeated measure analysis of variance and Bonferroni test;Pearson linear correlation analysis was used,and P ＜ 0.05 was considered statistically significant.Results At the same observation interval in two groups of patients with VAP,there was no significant difference in the serum levels of PCT and CPIS score (P ＞ 0.05);there were significant differences in PCT and CPIS scores between VAP occurred at the first day,the third day and at time of intra-tracheal intubation in two groups (P ＜ 0.05).However,comparison of PCT and CPIS scores at the seventh day,the differences were not statistically significant (P ＞ 0.05).In addition,at the 7 days the correlation coefficient between PCT and survival patients' mechanical ventilation,days in ICU and total length of hospital stay were 0.92,0.83,and 0.71,respectively,yet the 7-day CPIS score correlation coefficients were 0.83,0.74 and 0.70,(both P ＜ 0.05).Conclusions Early monitoring of serum PCT and CIPS score of pulmonary tuberculosis patients can judge the incidence of VAP,and the variations of PCT and CIPS score can predict the severity and prognosis of the disease as well.

Objective To study the effect of DNA damage induced by H2 O2 on the micronucleus frequency in lymphocytes. Methods Resting lymphocytes were treated with different levels of H2 O2 (10,50,100,1 000 μmol/L).1 000 μmol/L H2 O2 was added into mitogen-stimulated lymphocyte cultures at different time intervals.Then micronucleus rate was examined by the conven-tional culture method.Results There was no significant change of the micronucleus frequency in the experimental groups.Conclu-sion H2 O2 could induce lymphocyte DNA damage rapidly,but exerts no effect on the formation of micronuclei,which may be relat-ed to the type of DNA damage and rapid DNA repair.

OBJECTIVETo investigate the distribution and drug-resistance of bacteria in the lower respiratory tract in patients with tuberculosis and severe pneumonia receiving invasive mechanical ventilation.

METHODSThe clinical data, lower respiratory tract infection pathogens and bacterial drug sensitivity were analyzed in 208 patients receiving invasive mechanical ventilation for tuberculosis and severe pneumonia.

RESULTSA total of 355 pathogenic microbial strains were obtained from the patients, among which 281 (79.2%) strains were Gram-negative bacteria, 62 (17.5%) were fungi, and 12 (3.4%) were Gram-positive bacteria. Mixed infections were found in 68 cases (19.2%). The sensitivity rates of meropenem, imipenem and amikacin were over 60% for Gram-negative bacteria, and those of teicoplanin, vancomycin, and fusidic acid were 100% for Gram-positive bacteria.

CONCLUSIONThe main pathogenic bacteria are Gram-negative bacteria, fungi and Gram-positive bacteria in the lower respiratory tract of patients with tuberculosis and severe pneumonia receiving mechanical ventilation. Meropenem, imipenem and amikacin are effective antibiotics for lower respiratory tract infections, and multi-drug resistance is frequent in these patients, which urges appropriate use of the antibiotics.

Anti-Bacterial Agents ; pharmacology ; Drug Resistance, Bacterial ; Gram-Negative Bacteria ; isolation & purification ; Gram-Positive Bacteria ; isolation & purification ; Humans ; Microbial Sensitivity Tests ; Pneumonia, Bacterial ; microbiology ; Respiration, Artificial ; Respiratory Tract Infections ; microbiology ; Tuberculosis ; microbiology

OBJECTIVE:To evaluate the analgesic efficacy and safety of tramadol im.on pain after thoracic surgery.MET_ HODS:34cases after thoracic surgery were given tramadol im.in a dose of1.5mg/kg.The analgesic effect and adverse effect were observed.RESULTS:The significant effective rate of pain relief was41.2%and effective rate was38.2%with a total effective rate of79.4%.Some adverse effects including temporary nausea,vomiting,perspiration,dysuria were observed in a part of the patients.No respiratory inhibition was found.CONCLUSION:Tramadol(1.5mg/kg)im.is safe and effective in treatment of the pain after thoracic surgery.

OBJECTIVE:To investigate the effects of urapidil on the hemodynamics of the right heart in patients with rheumatic heart disease and secondary pulmonary hypertension METHODS:34 patients with rheumatic heart disease and varying degrees of secondary pulmonary hypertension were included in the study In all patients,the hemodynamic parameters and pressure of systemic circulation were determined before and 20,40,60 min after urapidil intraverous injection in a dose of 0 4mg/kg RESULTS:Pulmonary artery pressure,pulmonary vascular resistance,pulmonary capillary wedge pressure and systemic artery pressure were decreased after urapidil injection The reduction of resistance in the pulmonary vascular bed was greater than that in the systemic circulation There were no significant alterations in heart rate and cardic output No serious side-effects were observed in the study CONCLUSION:Urapidil may be a promising drug in the treatment of patients with pulmonary hypertension due to rheumatic heart disease