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"Si, Hongyu"
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Investigation of job stability and influencing factors for graduates of public health-related majors in Jiangxi Province, China
Background
Public health graduates play a crucial role in disease prevention, yet China is experiencing significant workforce attrition. Jiangxi Province illustrates this problem, with a public health workforce density of 7.31 per 10,000 population, which falls short of national standards, and ongoing difficulties in recruitment and retention. This study explores turnover intention and its predictors among public health graduates in Jiangxi to provide evidence for improving retention strategies.
Methods
A cross-sectional survey was conducted among 546 graduates, yielding a 91% response rate, using convenience sampling. Multivariable logistic regression and structural equation modeling (SEM) were applied to identify predictors of turnover intention and psychological contract dimensions.
Results
Factors associated with lower turnover intention included being older than 30 years (
OR
= 0.169), holding senior professional titles (
OR
= 0.131), working in administrative roles (
OR
= 0.157), and having permanent employment status (
OR
= 0.265). SEM analysis showed that all dimensions of the psychological contract (normative, developmental, and relational) were negatively associated with turnover intention, with relational contracts exerting the strongest influence (
β
= −0.620).
Conclusion
Strengthening job stability through measures such as career advancement opportunities and fulfillment of psychological contracts is essential for retaining public health professionals in under-resourced provinces like Jiangxi.
Journal Article
Effects of fitness qigong and tai chi on middle-aged and elderly patients with type 2 diabetes mellitus
Currently, qigong and tai chi exercises are the two most common preventive as well as therapeutic interventions for chronic metabolic diseases such as type 2 diabetes mellitus (T2DM). However, the quantitative evaluation of these interventions is limited. This study aimed to evaluate the therapeutic efficacy of qigong and tai chi intervention in middle-aged and older adults with T2DM. The study included 103 eligible participants, who were randomized to participate for 12 weeks, in one of the following intervention groups for the treatment of T2DM: fitness qigong, tai chi, and control group. Three biochemical measures, including fasting plasma glucose (FPG), glycated hemoglobin (HbA1C), and C-peptide (C-P) levels, assessed at baseline and 12 weeks, served as the primary outcome measures. During the training process, 16 of the 103 participants dropped out. After the 12-week intervention, there were significant influences on HbA1C ( F 2,83 = 4.88, p = 0.010) and C-P levels ( F 2,83 = 3.64, p = 0.031). Moreover, significant reduction in C-P levels was observed after 12-week tai chi practice ( p = 0.004). Furthermore, there was a significant negative correlation between the duration of T2DM and the relative changes in FPG levels after qigong intervention, and the relative changes in HbA1C levels were positively correlated with waist-to-height ratio after tai chi practice. Our study suggests that targeted qigong exercise might have a better interventional effect on patients with a longer duration of T2DM, while tai chi might be risky for people with central obesity. Trial registration: This trial was registered in Chinese Clinical Trial Registry. The registration number is ChiCTR180020069 . The public title is “Health-care qigong · study for the prescription of chronic diabetes intervention.”
Journal Article
Association of retinal microvascular abnormalities with all-cause and specific-cause mortality among U.S. adults
Background
Retinal microvascular abnormalities (RMA) reflect cumulative microvascular damage from systemic diseases and aging. However, little is known about the association between RMA and long-term survival outcomes. This study aimed to examine the relationships between RMA and the risk of all-cause and specific-cause mortality among U.S. adults.
Methods
Individuals aged
≥
40 years were included from the U.S. National Health and Nutrition Examination Survey, 2005–2008. RMA and its subtypes, including retinopathy, arteriovenous nicking (AVN), focal arteriolar narrowing (FAN) and Hollenhorst plaque (HP), were manually graded from retinal photographs. Associations between RMA and the risk of all-cause and cause-specific mortality were examined with Cox regression analysis.
Results
This cohort study of 5775 adults included 2881 women (weighted proportion, 52.6%) and 2894 men (weighted, 47.4%), with a weighted mean (SE) age of 56.6 (0.4) years. RMA were present in 1251 participants (weighted, 17.9%), of whom 710 (weighted, 9.8%) had retinopathy, 635 (weighted, 9.3%) had AVN, 64 (weighted, 1.0%) had FAN, and 21 (weighted, 0.3%) had HP. During a median of 12.2 years (range, 0.1–15.0 years) of follow-up, 1488 deaths occurred, including 452 associated with cardiovascular disease (CVD), 341 associated with cancer, and 695 associated with other causes. After adjusting confounding factors, the presence of any RMA and retinopathy at baseline was associated with higher risk of all-cause mortality (HR, 1.26; 95%CI, 1.07–1.47; HR, 1.36; 95%CI, 1.09–1.71, respectively), CVD mortality (HR, 1.36; 95%CI, 1.06–1.73; HR, 1.53; 95%CI, 1.04–2.26, respectively) and other-cause mortality (HR, 1.33; 95%CI, 1.06–1.67; HR, 1.55; 95%CI, 1.20–2.01, respectively). Additionally, FAN was significantly associated with an increased risk of other-cause mortality (HR, 2.06; 95%CI, 1.16–3.65). Although AVN was not associated with mortality in the whole population, it was significantly related to higher risks of all-cause and CVD death in those with obesity (HR, 1.68; 95%CI, 1.12–2.52; HR, 1.96; 95%CI, 1.23–3.13, respectively).
Conclusions
This study revealed that the presence of RMA is independently associated with greater risks of all-cause, CVD and other-cause mortality in adults aged 40 years or older.
Journal Article
Relationship Between the Practice of Tai Chi for More Than 6 Months With Mental Health and Brain in University Students: An Exploratory Study
To study whether Tai Chi (TC) practice can improve the brain connectivity of prefrontal lobe of college students, the positive psychological capital questionnaires and resting EEG signals were acquired from 50 college students including 25 TC practitioners and 25 demographically matched TC healthy controls. The results showed that the score of positive psychological capital questionnaire of TC group was significantly higher than that of the control group, and the node degree of frontal lobe and temporal lobe of both groups was positively correlated with the score of positive psychological capital questionnaire. In addition, the response time of TC group under auditory stimulation was significantly shorter than that of the control group, and there was a significant positive correlation between response time and its characteristic path length, and a significant negative correlation with global efficiency. Meanwhile, during the selected range of sparsity, the difference of global network parameters between two groups is significant in alpha band. Under all single sparsity, the clustering coefficient, global efficiency and local efficiency of TC group has a higher trend, while the characteristic path length tended to be shorter. In the analysis of the local characteristics of the resting brain functional network, it was found that the node degree of the frontal lobe and temporal lobe of the TC group was higher, and the difference was significant in some nodes. These results all point to the fact that TC practice has a certain impact on specific brain areas of the brain.
Journal Article
High-performance supercapacitor poplar catkin Ag/carbon fibers composites
An efficient method is described to fabricate carbonized wood fibers (CWF)-based electrode materials decorated with Ag particles (CWF-Ag) through electroless plating, and further carbonization from natural biomass poplar catkin and poplar fiber. Intrinsic physical advantages of poplar catkin fibers provide a chance of evenly dispersed Ag layer in addition to successful modulation of porosity and conductivity. However, the separation process resulted in cross-linked structures defect of poplar fibers, which impeded Ag particles to uniformly disperse. CWF-Ag from poplar catkin (CWF-Ag-poplar catkin) displays well-defined electrochemical performance for supercapacitors on account of its large specific surface area (745 m
2
/g), and hierarchical porous structure. Remarkably, CWF-Ag-poplar catkin achieves a high specific capacitance of 250 F/g at a current density of 1 A/g in 1 M KOH electrolyte that is about 1.3 times higher than CWF-Ag-poplar fiber (190 F/g). The result is due to uniform loading of silver on fibers. CWF-Ag-poplar catkin shows good rate capability and outstanding cycling stability up to 5000 times (only 5% loss of capacitance). The present study provides a simple and efficient approach (electroless plating) to design a high capacitance and stable supercapacitor electrode from natural biomass without treatment.
Graphic abstract
The present study provides a simple and efficient approach (electroless plating) to design a high capacitance and stable supercapacitor electrode from natural biomass, poplar catkin.
Journal Article
Dietary iron intake is nonlinearly associated with the risk of diabetic retinopathy in adults with type 2 diabetes
Objective
To elucidate the association between dietary iron intake and diabetic retinopathy (DR) in type 2 diabetes (T2D) patients.
Methods
Participants from the National Health and Nutrition Examination Survey (NHANES) 2005–2008 aged over 40 years with T2D were included. Dietary iron intake was estimated from standardised questionnaires. The presence of DR and vision-threatening DR (VTDR) was determined through retinal imaging. We used logistic regression to assess the relationship between iron intake and DR, and restricted cubic splines to reveal nonlinear links.
Results
The study enrolled 1172 T2D adults. We found significant nonlinear associations between dietary iron intake and DR among females (
P
= 0.023), but not in males (
P
= 0.490). Compared with the lowest quartile of iron intake, the third quartile (13.2–18.1 mg/d) yielded significantly lower odds of developing DR (odds ratio [OR], 0.59; 95% CI, 0.39–0.90) and VTDR (OR, 0.42; 95% CI, 0.19–0.94). Stratified logistic analyses showed that medium-high iron intake was associated with lower risks of DR in females (OR, 0.44; 95% CI, 0.24–0.81), non-Hispanic Blacks (OR, 0.38; 95% CI, 0.17–0.85), and individuals with obesity (OR, 0.45; 95% CI, 0.25–0.82), high HbA1c (OR, 0.56; 95% CI, 0.34–0.93), long diabetes duration (OR, 0.40; 95% CI, 0.21–0.76) or low blood haemoglobin (OR, 0.17; 95% CI, 0.05–0.60).
Conclusion
Dietary iron intake was nonlinearly negatively associated with the prevalence of DR and VTDR, showing protective effect against retinopathy of medium-high iron intake in T2D patients. Such associations significantly vary by multiple factors such as age, ethnicity, obesity and glycaemic control.
Journal Article
Enhanced activity of Ru-based catalysts for ammonia decomposition through nitrogen doping of hierarchical porous carbon carriers
Activated carbon (AC) materials, renowned for their high specific surface area, excellent conductivity, and customizable functional groups, are widely employed as catalyst carriers. However, enhancing the activity of Ru-based catalysts supported on AC (Ru/AC) for ammonia decomposition remains a challenge. In this study, commercial AC was utilized as a substrate, with glucose and urea employed as modifiers. Specifically, the surface of the AC was modified via a hydrothermal pyrolysis method, resulting in the successful post-treatment in situ co-doping of nitrogen (AC-GN). Experimental results revealed that Ru/AC-GN exhibited a hydrogen production rate 46% higher than that of Ru/AC at 475 °C, indicating improved activity and stability. The characterization of AC-GN demonstrated that nitrogen doping primarily occurred on the external surface and macropores of the AC, increasing the nitrogen content in the carrier, particularly pyrrolic nitrogen content, while preserving the original structural and morphological integrity of the AC. The enhanced dispersion of Ru, combined with the improved electronic transmission capabilities and strengthened interactions between the metal and the modified carrier, were identified as pivotal factors contributing to the enhanced low-temperature efficacy of Ru/AC-GN. This paper presents a novel direction for the large-scale preparation of efficient catalysts for ammonia decomposition.
Journal Article
Distribution characteristics and ecotoxicity assessment of polycyclic aromatic hydrocarbons (PAHs) in hydrothermal carbonization products of corn stalks
Hydrothermal carbonization (HTC) of corn straw causes hydrolysis and pyrolytic reorganization of the carbon skeleton, leading to the formation of polycyclic aromatic hydrocarbons (PAHs). When used as a soil amendment, hydrothermal carbon can lead to soil contamination, increased biotoxicity, and potential harm to ecosystem health. To systematically evaluate PAHs formation mechanisms, single-factor experiments were carried out by treating corn straw under varying temperatures (180 to 300 °C) and durations (2 to 6 h) in a closed batch reactor. PAHs were quantified via gas chromatography-mass spectrometry (GC-MS) with deuterated internal standards. Results revealed that total PAHs concentrations increased by 409%, 66.5%, and 68.3% at 180 °C, 210 °C, and 240 °C (4 h and 2 h), respectively, attributed to intensified dehydration and aromatization reactions under subcritical conditions. Conversely, PAHs levels decreased by 80.4% and 78.1% at 270 °C and 300 °C (4 h and 2 h), likely due to thermal cracking of PAHs macromolecules into low-molecular-weight fragments. Prolonged treatment (6 h and 4 h) reduced PAHs by 62.9 to 70.8% at ≤240 °C, suggesting oxidative degradation pathways dominate over pyrolysis under extended residence time. Mechanistic analysis indicated that optimizing HTC at 270 °C for 4 h achieves a critical balance between carbonization efficiency and PAHs suppression, providing a feasible strategy to mitigate ecotoxicological risks of hydrothermal carbon in soil remediation.
Journal Article
Visual analysis of hot spots and trends in research of meteorology and hemorrhagic fever with renal syndrome: a bibliometric analysis based on CiteSpace and VOSviewer
Objective: We here displayed the global research trends of meteorology and hemorrhagic fever with renal syndrome (HFRS) as a visual knowledge map by using bibliometrics and revealed the research directions, hotspots, trends, and frontiers in this field. Methods: Using Web of Science core collection as the data source and with CiteSpace and VOSviewer software, we collected and analyzed the annual number of papers, cooperative relationships (countries, institutions, authors, etc.), citations (literature citation, literature co-citation, literature publication, etc.), keywords (emergence, clustering, etc.) of meteorology, and HFRS-related research data for the past 30 years, and drew a visual map. Results: In total, this study included 313 papers investigating the relationship between meteorology and HFRS. The first paper was published in 1992. Globally, United States had the largest number of publications in this field, and the Chinese Center for Disease Control and Prevention was the most influential institution conducting related research (20 articles published, and the mediation centrality was 0.24). Several small author cooperation clusters were formed; however, the number of papers published by the same scholar and the co-citation frequency were low. Cazelles Bernard (7 articles) published the highest number of articles in this field, and Gubler DJ was the author with the most co-citations (55 times). The most frequently cited journal was Emerging Infectious Diseases . In this field, the top three high-frequency keywords were “hemorrhagic fever,” “transmission,” and “temperature.” According to keyword cluster analysis, the top three themes were dengue, dechlorane plus, and bank voles. The timeline spectrum exhibited that dengue clustering had a good temporal continuity. The trend analysis of emergent words revealed that the research on “temperature,” “meteorological factors” and “ Puumala hantavirus ” has gradually appeared in recent years. Conclusion: This study represents the first comprehensive exploration of global trends, hotspots, frontiers, and developments in the relationship between meteorology and HFRS, utilizing CiteSpace and VOSviewer software. The findings of this study are crucial for elucidating the influence of climate change on disease transmission patterns and offering novel insights for forthcoming epidemiological research and public health interventions.
Journal Article