Objective To explore the relevant relationship and specificity between the implicit and explicit loyalty of military cadets in order to provide a theoretical basis and objective indicators for a more comprehensive and objective assessment for individual loyalty.Methods E-Prime 2.0,a classic implicit association paradigm was employed to construct an implicit association loyalty test for 64 military cadets.Simultaneously,an explicit loyalty measurement was conducted using the Chinese Military Personnel Loyalty Scale.Results ① Significant implicit effect was observed in the loyalty assessment of military cadets,indicating a general tendency to perceive higher levels of personal loyalty and lower levels of loyalty to external entities.② Explicit loyalty assessment revealed that the participants had the highest loyalty score towards the Party,the Nation,and the People(4.79±0.34),followed by the loyalty score to their profession(4.38±0.53),and the relatively lower loyalty score towards the unit and leaders(4.03±0.83).Among the 3 dimensions of loyalty,the normative loyalty score ranked highest,while continuance loyalty score took lower.③ There were no correlations among the scores of loyalty to the Party,the Nation,and the People(r=-0.030,P=0.823),to the profession(r=-0.047,P=0.728),to the unit(r=0.050,P=0.710),or to the leaders(r=0.043,P=0.749).Conclusion The implicit effect in the loyalty assessment is significant in military cadets,and there is no significant correlation between explicit and implicit loyalty measurements.Thus,we cannot rely solely on explicit measurements to assess their loyalty attitudes.

Objective To explore the causal relationship between family resilience and mental health in military personnel population.Methods A total of 204 military personnel were recruited from an army unit stationed in Western China with cluster convenience sampling.Family Resilience Scale(FRS)and Symptom Checklist 90(SCL-90)were used to survey them twice,in an interval of 4 months.Amos 26.0 was applied to construct a cross-lag model and analyze the data.Results After controlling mental symptoms from the first survey,family resilience in the first measure significantly predicted mental symptoms in the second measure(β=-0.14,P＜0.05).After controlling for family resilience from the first survey,mental symptoms in the first measure significantly predicted family resilience in the second measure(β=-0.13,P＜0.05).Conclusion The relationship between family resilience and mental health is mutually causal in military personnel,and one predicts the other one.Our findings highlight the key dimensions of the relationship between the two.

Objective To explore the characteristics and influencing factors of family resilience among Chinese PLA Army personnel.Methods A total of 8 094 military personnel subjected with cluster sampling were surveyed with family resilience scale(FRS)and self-designed questionnaire for basic information on military families.Independent sample t test,one-way analysis of variance and step-up regression analysis were employed to analyze the family resilience.Results ① The results of demographic variable analysis showed that there were significant differences in family resilience among the personnel with different marital status,from one-child family or not,birth in rural/urban areas,personnel category,age and education level(P＜0.05).② Family factors analysis indicated that different family structure,different family relationships,family rearing styles,recent separation from family members,and frequency of contacting family members had certain effects on family resilience(P＜0.05).③ When family relationship,family rearing styles,frequency of contacting family members,birth place,recent separation from family,personnel category,from one-child family,and education level entered the regression equation,the resilience level of army personnel'families was increased by 8.197 for every 1 unit increase in family relationship,and the level of family resilience was increased by 4.688 for every 1 unit increase in family contact frequency(F=202.168,P＜0.05).Conclusion The overall level of family resilience of army personnel is good.The risk factors for family resilience are recent separation from their families for ≥1 year,officers,not from only-children family,and the protective factors are harmonious relationship with their families,democratic family rearing style,contacting with their families weekly,urban birth,and bachelor degree or above.

Objective To explore the features of sleep quality and its relationship with perceived stress and occupational stress in military personnel serving in high-altitude regions.Methods Cross-sectional study design was adopted in this study.In February 2023,self-designed demographic data questionnaire,Pittsburgh sleep quality index(PSQI),perceived stress scale(PSS-10)and job content questionnaire(JCQ)were applied to survey 3 784 soldiers from a unit stationing in plateau subjected by cluster sampling.Results The total score of PSQI was 5.37±2.78 in the participants,and the total score and the scores of each dimension of PSQI were significantly higher than the national norms for Chinese(P＜0.001).There were significant differences in PSQI scores among different age,length of military service,nationality,length of stationing in plateau,education level and family structure(P＜0.001).The low perceived stress group had significantly lower PSQI scores than the high perceived stress group(t=-12.108,P＜0.001).Regulatory effect analysis showed that the length of stationing in plateau,work autonomy,work psychological requirements,and social support in the work environment could modulate the relationship between perceived stress and sleep quality(t=8.326,-3.788,-2.145,-6.656,P＜0.05),and explained 14.6％,7.6％,7.0％and 7.9％of the variance of sleep quality,respectively.Conclusion The military personnel serving in high-altitude regions have a poor sleep quality.Age,time of military service,time of stationing in plateau,nationality,family structure,education level,perceived stress,and occupational stress are important factors affecting their sleep quality.The length of stationing in plateau time and occupational stress,can modulate the relationship between perceived stress and sleep quality.

Objective:To estimate and analyze the levels of occupational exposure of aircrews in China, and to provide scientific basis for strengthening occupational health management.Methods:Through the FlightAware website, the flight data were collected of a total of 104 routes flying between airports with large passenger volume in China. Four kinds of cosmic radiation dose estimation programs CARI, SIEVERT, PCAIRE, and JISCARD-EX were compared and analyzed from the aspects of covering the number of airports in China, program user experience and example calculation of airline effective dose. Based on route logs, CARI-7A was applied to estimate the levels of occupational exposure of Chinese aircrews to cosmic radiation.Results:The difference in the effective doses calculated by use of these four cosmic radiation dose estimation programs for the routes with different solar activity levels was statistically significant ( M=7.52-180.98, P<0.05). The annual effective dose estimated by PCAIRE for 68 routes from 2014 to 2021 was significantly higher than that estimated by CARI-7A ( Z=2.52, P<0.05). Based on CARI-7A, the annual effective doses from cosmic radiation to aircrews in China from 2014 to 2021 were estimated, being 1.26 (0.57-2.35) mSv for flight attendants and 1.03 (0.47-1.92) mSv for pilots. The effective dose from cosmic radiation to aircrews on a single flight on some high-frequency routes in China ranged from 0.57 to 6.88 μSv. Conclusions:The level of occupational exposure of Chinese aircrews to cosmic radiation meets the requirements of national standards, but is higher than that of occupational exposure from medical and industrial applications of radiation, so it is still necessary to further strengthen the mamagememt of occupational exposure and occupational health of aircrews.

Hydrogels/therapeutic use* ; Tissue Engineering ; Gelatin ; Intervertebral Disc/surgery* ; Methacrylates ; Tissue Scaffolds

Objective:To evaluate the effect of dexmedetomidine-based anesthesia on cerebral oxygen saturation in the patients undergoing total laparoscopic hysterectomy.Methods:Fifty American Society of Anesthesiologists Physical Status classificationⅠorⅡpatients, aged 20-64 yr, undergoing elective total laparoscopic hysterectomy, were divided into 2 groups ( n=25 each) using a random number table method: conventional group (C group) and dexmedetomidine group (D group). Bilateral regoinal oxygen saturation (rSO 2) was monitored using a cerebral oxygen saturation monitor. In D group, dexmedetomidine was intravenously infused as a bolus of 0.5 μg/kg before anesthesia induction, and 10 min later dexmedetomidine was then given by an infusion of 0.5 μg·kg -1·h -1 until 30 min before the end of operation. The equal volume of normal saline was given instead in C group. The remaining anesthesia regimen was the same in two groups. The maximum (LrSO 2max, RrSO 2max) and minimum (LrSO 2min, RrSO 2min) of bilateral rSO 2 were recorded from entry to 2 min after induction (D 1), from >2 min after induction to completion of tracheal intubation (D 2), from completion of tracheal intubation to the end of skin incision (D 3), from skin incision to completion of pneumoperitoneum (D 4), from pneumoperitoneum to completion of Trendelenburg position (D 5), within 20 min of Trendelenburg position (D 6), >20-40 min of Trendelenburg position (D 7), >40-60 min of Trendelenburg position (D 8), and from >60 min of Trendelenburg position to 10 min after return to supine position (D 9). The occurrence of 60% baseline value 0.05). Compared with C group, the LrSO 2min, LrSO 2max, RrSO 2min, and RrSO 2max were significantly increased in D 4-D 8 periods in D group ( P<0.05). No bilateral rSO 2 <75% baseline value was found in group D. Conclusions:Dexmetomidine-based anesthesia can elevate intraoperative rSO 2 in the patients undergoing total laparoscopic hysterectomy.

Objective:To collect the Internet news about "sudden death", analyze its characteristics and resuscitation effects, so as to provide reference for formulating intervention strategies.Methods:The Internet was used to search for "sudden death" and "cardiac arrest" on "Baidu" and "360" websites. Reports of sudden death events were collected from January 2013 to December 2022. The age, gender, characteristics of sudden death, implementation characteristics of cardiopulmonary resuscitation (CPR), and pre-hospital and final clinical outcomes of sudden death patients were recorded and analyzed. Subgroup analyses were performed for pre-hospital and final clinical outcomes. Unconditional multivariate Logistic regression analysis was used to screen the related factors affecting the pre-hospital and final clinical outcomes in patients with sudden death.Results:177 news reports were finally confirmed, involving 177 sudden death patients, including 152 males (85.9%) and 25 females (14.1%), aged (37.27±16.82) years old, and 53.1% in the 16-45 years old group. Triggering factors included strenuous exercise (29.9%), heart disease history (7.9%), overwork (6.2%), staying up late and insomnia (4.0%), activation of emotion (2.8%), and no obvious inducement (48.0%). After on-site first aid, 104 cases (58.8%) achieved restoration of spontaneous circulation (ROSC) before hospital admission, and 18 cases (10.2%) recovered consciousness. After clinical treatment, 109 cases (61.6%) achieved ROSC, 86 cases (48.6%) recovered consciousness, and 22 cases (12.4%) did not report the final outcome. Subgroup analysis showed that compared with patients who achieved pre-hospital ROSC ( n = 104), sudden death in non-ROSC patients ( n = 73) mainly occurred during sleep, in residence and without immediate CPR, full CPR, or automated external defibrillator (AED); and patients who ultimately did not recover consciousness clinically ( n = 91) showed similar characteristics compared with patients who recovered consciousness ( n = 86). Multifactorial Logistic regression analysis showed that immediate CPR [pre-hospital ROSC: odds ratio ( OR) = 8.06, 95% confidence interval (95% CI) was 2.36-27.46; final recovery of consciousness: OR = 9.10, 95% CI was 2.46-33.68] and AED defibrillation (pre-hospital ROSC: OR = 36.31, 95% CI was 4.53-291.19; final recovery of consciousness: OR = 3.53, 95% CI was 1.45-8.61) facilitated pre-hospital achievement of sudden death patients ROSC and final recovery of consciousness. Conclusions:Out-of-hospital sudden death mainly occurs in young people, and vigorous exercise is one of the potential factors for out-of-hospital sudden death, with nearly half having no obvious cause. Immediate and rapid CPR and defibrillation are the simplest and most effective on-site first aid methods. Strengthening public CPR and defibrillation education and training, and advocating healthy lifestyle are effective ways to improve the survival rate of sudden death and reduce the occurrence of sudden death. Based on practical clinical rescue experience, the implementation of bystander CPR by medical personnel is also a factor that cannot be ignored in affecting the clinical outcomes of sudden death patients.

Objective:To explore the effects of scutellarein on the cell proliferation and migration of cervical cancer cell line HCC94 through miRNA-496 (miR-496) and stromal cell-derived factor 1 (SDF-1).Methods:HCC94 cells in the logarithmic growth phase were taken as objects, and 20 μmol/L scutellarin solution (scutellarin group) and dimethyl sulfoxide (DMSO) (control group) were added respectively. The CCK-8 method and Transwell experiment were used to detect the proliferation and migration ability of the two groups of HCC94 cells. The relative expression levels of miR-496 and SDF-1 mRNA were detected by real-time quantitative polymerase chain reaction (qRT-PCR). The target gene of miR-496 was predicted by the bioinformatics software TarBase and verified by the dual-luciferase reporter gene assay. Western blot was used to detect the expression of related proteins.Results:Compared with the control group, the proliferation ability of HCC94 cells in the scutellarin group was decreased on the 3rd, 4th and 5th day of culture (all P < 0.05). The number of HCC94 cells in the scutellarin group and the control group were 25±5 and 134±19, respectively, and the cell migration ability of the scutellarin group was lower than that of the control group ( t = 5.61, P < 0.01). The relative expressions of miR-496 in the control group and the scutellarin group were 1.07±0.12 and 11.24±2.75, respectively, and the difference was statistically significant ( t = 3.68, P < 0.01). The dual-luciferase reporter gene assay confirmed that SDF-1 was the downstream targeted gene of miR-496. The relative expressions of SDF-1 mRNA in the scutellarin group and the control group were 0.29±0.05 and 1.01±0.07, respectively, and the difference was statistically significant ( t = 7.22, P < 0.01). Compared with the control group, after scutellarin promoted the expression of miR-496, the expressions of SDF-1 protein, the cell proliferation protein cyclin-dependent kinase 3 (CDK3) and the cell migration proteins Slug and Zeb-2 were decreased. Conclusions:Scutellarin could inhibit the proliferation and migration of cervical cancer HCC94 cells through the miR-496-SDF-1 axis.