Abstract. A Nationwide Nitrogen Deposition Monitoring Network (NNDMN) containing 43 monitoring sites was established in China to measure gaseous NH3, NO2, and HNO3 and particulate NH4+ and NO3− in air and/or precipitation from 2010 to 2014. Wet/bulk deposition fluxes of Nr species were collected by precipitation gauge method and measured by continuous-flow analyzer; dry deposition fluxes were estimated using airborne concentration measurements and inferential models. Our observations reveal large spatial variations of atmospheric Nr concentrations and dry and wet/bulk Nr deposition. On a national basis, the annual average concentrations (1.3–47.0 μg N m−3) and dry plus wet/bulk deposition fluxes (2.9–83.3 kg N ha−1 yr−1) of inorganic Nr species are ranked by land use as urban > rural > background sites and by regions as north China > southeast China > southwest China > northeast China > northwest China > Tibetan Plateau, reflecting the impact of anthropogenic Nr emission. Average dry and wet/bulk N deposition fluxes were 20.6 ± 11.2 (mean ± standard deviation) and 19.3 ± 9.2 kg N ha−1 yr−1 across China, with reduced N deposition dominating both dry and wet/bulk deposition. Our results suggest atmospheric dry N deposition is equally important to wet/bulk N deposition at the national scale. Therefore, both deposition forms should be included when considering the impacts of N deposition on environment and ecosystem health.

Abstract. Global reactive nitrogen (Nr) deposition to terrestrial ecosystems has increased dramatically since the industrial revolution. This is especially true in recent decades in China due to continuous economic growth. However, there are no comprehensive reports of both measured dry and wet Nr deposition across China. We therefore conducted a multiple-year study during the period mainly from 2010 to 2014 to monitor atmospheric concentrations of five major Nr species of gaseous NH3, NO2 and HNO3, and inorganic nitrogen (NH4+ and NO3−) in both particles and precipitation, based on a Nationwide Nitrogen Deposition Monitoring Network (NNDMN, covering 43 sites) in China. Wet deposition fluxes of Nr species were measured directly; dry deposition fluxes were estimated using airborne concentration measurements and inferential models. Our observations reveal large spatial variations of atmospheric Nr concentrations and dry and wet Nr deposition. The annual average concentrations (1.3–47.0 μg N m−3) and dry plus wet deposition fluxes (2.9–75.2 kg N ha−1 yr−1) of inorganic Nr species ranked by region as North China > Southeast China > Southwest China > Northeast China > Northwest China > the Tibetan Plateau or by land use as urban > rural > background sites, reflecting the impact of anthropogenic Nr emission. Average dry and wet N deposition fluxes were 18.5 and 19.3 kg N ha−1 yr−1, respectively, across China, with reduced N deposition dominating both dry and wet deposition. Our results suggest atmospheric dry N deposition is equally important to wet N deposition at the national scale and both deposition forms should be included when considering the impacts of N deposition on environment and ecosystem health.

Background: Rosacea is recognized as a chronic inflammatory cutaneous disorder associated with multiple systemic illnesses. However, the association between rosacea and cardiometabolic disease (CMD) remains controversial. Objective: To evaluate the association between rosacea and CMD by a systematic review and meta-analysis. Methods: A comprehensive search of studies published before October 16, 2019, was performed in databases of PubMed, Embase, Cochrane Library, and Web of Science. The pooled risk ratios or standardized mean differences were calculated. Results: Thirteen studies were included, representing 50,442 patients with rosacea. Patients with rosacea had higher prevalence of dyslipidemia, higher prevalence of hypertension, higher total cholesterol, higher low-density lipoprotein, higher triglycerides, higher systolic blood pressure, higher diastolic blood pressure, and higher fasting blood glucose. Rosacea was not associated with ischemic heart disease, stroke, diabetes, and high-density lipoprotein. Limitations: No subgroup analysis could be performed according to the subtypes and severity of rosacea. Conclusions: Rosacea showed a correlation with hypertension and dyslipidemia but not with ischemic heart disease, stroke, or diabetes. We advocate screening for CMD indicators among patients with rosacea, which may be helpful for diagnosis and appropriate treatment at an early stage of disease.

Objective To explore the promising use of mesenchymal stem cells (MSCs) for ulcerative colitis (UC). Methods Studies reporting MSC treatment on UC were searched on five databases. Methodological quality was assessed based on the SYRCLE’s Risk of Bias (RoB) tool and MINORS tool. Data analysis was conducted using Engauge Digitizer 10.8 and Stata 14.0. Results A total of 15 studies met the inclusion criteria including 8 animal ( n = 132) and 7 human ( n = 216) trials. In animal studies, mice treated with MSCs had significantly lower disease activity index (DAI) than that in the control group: the 1st day (standardized mean difference (SMD) − 0.753, p = 0.027), the 3rd day (SMD − 1.634, p = 0.000), the 5th day (SMD − 2.124, p = 0.000), the 7th day (SMD − 5.327, p = 0.000), the 9th day (SMD − 2.979, p = 0.000), and the 14th day (SMD − 5.032, p = 0.000). Lower histopathological score (HS) (SMD − 5.15, p < 0.05) and longer colon length (SMD 2.147, p = 0.001) in mice treated with MSCs were also indicated. The main outcome in clinical trials showed, compared with control group, healing rate of patients accompanied by MSC therapy elevated obviously: MSCs vs 5-aminosalicylic acids (5-ASA) (RR = 2.317, p = 0.000) and MSCs + 5-ASA vs placebo + 5-ASA (RR = 5.118). The analytical data in 4 trials conducted with single-arm studies also demonstrated increased healing rate (0.787) after MSC treatment ( p = 0.000). Conclusion Our meta-analysis results supported that MSCs could be an underlying method of treating UC. Electronic supplementary material The online version of this article (10.1186/s13287-019-1336-4) contains supplementary material, which is available to authorized users.

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Background: Previous investigations have suggested a significant association between inflammatory bowel disease (IBD) and atopic dermatitis (AD). Yet, outcomes published remain inconsistent. Objective: To explore the association between IBD and AD by a systematic review and meta-analysis. Methods: A comprehensive search of studies published from March 1, 1968, to July 26, 2019, was performed in electronic databases as follows: PubMed, Embase, Cochrane Library, and Web of Science. Methodological quality was assessed based on the Newcastle-Ottawa Scale. Data analysis was conducted using R version 3.6.1 (meta package version 4.9-7). Results: A total of 14 studies were eligible for exploring the association between IBD and AD. Statistically significant differences were found on the risk of AD comorbidity among patients with IBD (risk ratio [RR] 1.83, 95% CI 1.39-2.40), Crohn's disease (CD; RR 2.06, 95% CI 1.61-2.64), and ulcerative colitis (UC; RR 1.66, 95% CI 1.23-2.24). Compared with non-AD subjects, patients with AD were 48% (p = 0.019), 44% (p = 0.002), and 38% (p = 0.000) more likely to exhibit IBD, CD as well as UC, respectively. Discussion: Our evidence supported a significant bidirectional association between IBD and AD. Future prospective studies are warranted to explore underlying mechanisms linking them.

Emotional labor plays an essential role in school leadership and teaching, as principals and teachers undergo complex interactions with students, colleagues, and parents. Although researchers have realized the influence of leaders' behaviors on followers' emotions in management and educational contexts, the relationship between leadership behaviors, teachers' emotional labor, and related organizational outcomes has been underexplored. As leadership and emotional labor are situated and influenced by cultural contexts, the current study focused on the relationship between teachers' emotional labor strategies, multidimensional teacher commitment, and paternalistic leadership, a unique leadership type rooted in Confucianism. Paternalistic leadership is a style that combines strong authority with fatherly benevolence, which is prevalent in East Asia and the Middle East. A sample of 419 teachers was randomly selected to participate in a survey. The results showed that principals' authoritarian leadership behaviors had negative influences on teachers' commitment to the profession and commitment to the school. Benevolent leadership had positive effects on teachers' commitment to students, commitment to the profession, and commitment to the school. Teachers' deep acting played positive mediating effects, while surface acting was a negative mediator. The results imply that school leaders could properly exert parent-like leadership practices to facilitate teacher commitment through managing teachers' emotions.

Objective This study aims to evaluate the efficacy and safety of three bismuth‐based quadruple regimens for eradication of Helicobacter pylori (H pylori) infection in a large number of H pylori‐positive patients with or without previous eradication therapy. Methods Consecutive adult patients with H pylori infection, regardless of previous eradication therapy, were eligible for the present study. Three bismuth‐based quadruple regimens were selected according to the past history of antibiotics use: (A) esomeprazole, amoxicillin, clarithromycin, and colloidal bismuth tartrate; (B) esomeprazole, amoxicillin, furazolidone, and colloidal bismuth tartrate; and (C) esomeprazole, doxycycline, furazolidone, and colloidal bismuth tartrate. All patients received a 14‐day course of treatment, and 13C/14C urea breath test was utilized at four weeks after the completion of treatment to determine the H pylori eradication. Then, the eradication rates were calculated in terms of intention‐to‐treat (ITT) and per‐protocol (PP) analyses. Adverse events (AEs) were recorded during the treatment. Results Overall, 1,226 patients were recruited, and 331, 57, and 838 patients were allocated to receive regimens A, B, and C, respectively. The H pylori eradication rates were 84.0%, 82.5%, and 82.9% (ITT) and 94.6%, 92.2%, and 93.7% (PP), respectively, in regimens A, B, and C. However, there was no significant difference among these three regimens. The incidence of AEs was 4.6% for all patients during the study, that is, 3.3%, 10.5%, and 4.7% for regimens A, B, and C, respectively. All AEs were mild and recovered at the follow‐up visit. Conclusion All three bismuth‐based quadruple regimens based on the previous antibiotic use can achieve satisfactory eradication rates for H pylori infection and are safe.