Microbial denitrification is a major pathway for nitrogen removal from water bodies. However, denitrification is often difficult to continue when there is a lack of microbially available organic matter in the water body to serve as electron donors. In recent years, studies have shown that some denitrifying bacteria can directly utilize photoelectrons generated by sunlight-excited semiconductor minerals or natural organic matter for denitrification without the need for bioavailable organic matter as electron donors. This process is defined as microbial photoelectrotrophic denitrification. The discovery of microbial photoelectrotrophic denitrification phenomenon reshapes the previous knowledge about the chemoheterotrophic mode of denitrifying bacteria and broadens the pathway of nitrogen removal by the new photoelectrotrophic metabolism, which is of great significance to our understanding and exploration of sunlight-driven nitrogen cycling process. In this paper, we comprehensively sort out the existing research reports in the field of microbial photoelectrotrophic denitrification, systematically summarize the principle and the current research progress of microbial photoelectrotrophic denitrification, deeply analyze the problems and challenges faced by this technology, and make an outlook on the future research directions and application prospects of this technology, providing a reference for the further research and application of this technology.
Denitrification/physiology* ; Nitrogen/isolation & purification* ; Bacteria/metabolism* ; Sunlight ; Phototrophic Processes

Objective:To explore the expert opinions on the revision of the Diagnosis of Occupational Arsenic Poisoning (GBZ 83-2013) .Methods:In March 2023, the improved Delphi expert consultation method was adopted, in the first round of consultation, a pre-survey was conducted on 20 experts, and the questionnaire was improved according to the experts' opinions. Then, a second round of expert consultation questionnaire was formed to conduct a questionnaire survey and consultation of 50 experts engaged in occupational disease diagnosis and related work. The feedback of experts was collected and analyzed.Results:The average score for the scientificity and progressiveness of the main technical content of the original standard was 3.33, and the average score for the rationality and operability of the main technical content of the original standard was 3.25. The importance of individual indicators with specific connotations were ranged from 4.20 to 4.45, with coefficients of variation <0.25, and the experts' opinions were relatively concentrated. The experts have provided feedback indicating that the original standard had issues such as lack of continuity in diagnostic gradation, the need to integrate biomarkers with urinary and hair arsenic levels, a scarcity of objective diagnostic indicators, the removal of exposure response from the main text, and a low level of consistency in standard usage. These issues need to be revised urgently.Conclusion:The Diagnosis of Occupational Arsenic Poisoning (GBZ 83-2013) should be revised based on experts' feedback and suggestions to meet the current real demand for occupational arsenic poisoning diagnosis.

Objective:To explore the expert opinions on the revision of the Diagnosis of Occupational Arsenic Poisoning (GBZ 83-2013) .Methods:In March 2023, the improved Delphi expert consultation method was adopted, in the first round of consultation, a pre-survey was conducted on 20 experts, and the questionnaire was improved according to the experts' opinions. Then, a second round of expert consultation questionnaire was formed to conduct a questionnaire survey and consultation of 50 experts engaged in occupational disease diagnosis and related work. The feedback of experts was collected and analyzed.Results:The average score for the scientificity and progressiveness of the main technical content of the original standard was 3.33, and the average score for the rationality and operability of the main technical content of the original standard was 3.25. The importance of individual indicators with specific connotations were ranged from 4.20 to 4.45, with coefficients of variation <0.25, and the experts' opinions were relatively concentrated. The experts have provided feedback indicating that the original standard had issues such as lack of continuity in diagnostic gradation, the need to integrate biomarkers with urinary and hair arsenic levels, a scarcity of objective diagnostic indicators, the removal of exposure response from the main text, and a low level of consistency in standard usage. These issues need to be revised urgently.Conclusion:The Diagnosis of Occupational Arsenic Poisoning (GBZ 83-2013) should be revised based on experts' feedback and suggestions to meet the current real demand for occupational arsenic poisoning diagnosis.

Objective:To evaluate the effect of five-element acupuncture on clinical symptoms, brain metabolism and immunoglobulin level in patients with chronic fatigue syndrome.Methods:It was a randomized controlled trial. A total of 94 patients with chronic fatigue syndrome in our hospital from January 2021 to January 2022 were selected and divided into two groups according to the random number table method, with 47 in each group. The conventional western medicine group was treated with conventional western medicine, and the five-element acupuncture group was treated with five-element acupuncture on the basis of the conventional western medicine group. Both groups were treated for 4 weeks. Before and after treatment, the serum levels of interferon-γ (IFN-γ), corticosterone (CORT), IL-2 and 5-hydroxytryptamine (5-HT) were detected by ELISA; the levels of natural killer (NK) cells, CD4 +, CD8 +, IgG and IgM were detected by flow cytometry; the whole body superconducting MRI scanner was used to scan T2 Flair, T2WI and TlWI sequences of the hippocampus, and the spectral curves and the areas under the peak of N-acetylaspartic acid (NAA), creatine (Cr) and choline (Cho) were obtained, and the ratios of Cho/Cr and NAA/Cr were calculated. the fatigue Scale-14 (FS-14) and Fatigue Severity Scale (FSS) were used to evaluate the fatigue state of the patients, and the Depression-Anxiety-Stress Scale-21 (DASS-21) and Beck Anxiety Inventory (BAI) were used to evaluate the anxiety state of the patients. Symptom Checklist 90 (SCL-90) and Somatic and Mental Health Report Score (SPHERE) were used to evaluate the quality of life of patients. And the clinical efficacy was evaluated. Results:After treatment, the levels of IgG, CD4 + and NK in the five-element acupuncture group were significantly higher than those in the conventional western medicine group ( t values were 4.76, 3.65, 6.42, respectively, P<0.01), and the level of IgM, CD8 + was significantly lower than that in the conventional western medicine group ( t values were 7.30, 4.79, P<0.01); the levels of IFN-γ, IL-2 and 5-HT in the observation group were significantly higher than those in the conventional western medicine group ( t values were 7.60, 4.05, 2.79, respectively, respectively, P<0.01), and the level of CORT was significantly lower than that in the conventional western medicine group ( t=6.72, P<0.01); the NAA/Cr levels in the left [(1.10±0.04) vs. (1.05±0.03), t=6.86] and right [(1.18±0.02) vs. (1.21±0.03), t=8.23] hippocampus of the experimental group were significantly higher than those in the conventional western medicine group ( P<0.01), and the Cho/Cr levels in the left [(1.08±0.04) vs. (1.03±0.03), t=5.70] and right [(1.17±0.02) vs. (1.20±0.03), t=5.71] hippocampus of the experimental group were significantly lower than those of the conventional western medicine group ( P<0.01). After treatment, the scores of physical fatigue, mental fatigue and FSS in the five-element acupuncture group were significantly lower than those in the conventional western medicine group ( t values were 8.08, 9.08 and 7.07, respectively, P<0.01). The scores of DASS-21, BAI, SCL-90 and SPHERE in the conventional western medicine group were significantly lower than those in the conventional western medicine group ( t values were 3.63, 5.77, 8.74, 5.92, respectively, P<0.01).The total effective rate was 95.74% (45/47) in the five-element acupuncture group and 82.98% (39/47) in the conventional western medicine group, and there was no significant difference between the two groups ( χ2=2.80, P=0.094). Conclusion:Five-elements acupuncture can improve the expression of T lymphocytes, increase the levels of immunoglobulin and NK, reduce the level of CORT, regulate the brain metabolism of NAA in the left and right hippocampus, improve the clinical symptoms and negative emotions, and improve the clinical efficacy and quality of life in patients with chronic fatigue syndrome.

Objective:To analyze the disease burden of chronic kidney disease (CKD) in the Belt and Road countries and its change trend.Methods:It was a cross-sectional epidemiological study based on surveillance data. Data on age-standardized prevalence rate (ASPR) and age-standardized mortality rate (ASMR) of CKD were derived from the 2019 Global Burden of Disease Study. The annual percentage change (APC) was calculated to evaluate the ASPR trend of CKD from 1990 to 2019.Results:In 2019, the number of CKD cases and deaths in the Belt and Road countries was 426 million and 798 000, respectively, accounting for 61.1% and 55.9% of CKD cases and deaths worldwide. The ASPR and ASMR of CKD in China were 8.1% and 11.2 per 100 000 population, slightly lower than the global average. Countries in North America and Oceania had a higher burden of CKD, and European countries had a lower burden. In the etiology, hypertension and diabetes-related CKD morbidity and mortality accounted for 23.7% and 68.8% of total CKD morbidity and mortality, respectively. From 1990 to 2019, the ASPR of CKD increased in 150 countries (98.0%) and the fastest increase was observed in Morocco ( APC=1.52%). The hotspots with high ASPR of CKD were located in Belt and Road countries from Asia, South/North America and Oceania, and the hotspots with high ASMR were distributed in countries from Africa, South/North America and Oceania. The sociodemographic index and life expectancy were positively correlated with the ASPR of CKD ( r=0.409, P<0.001; r=0.361, P<0.001) , and negatively correlated with the ASMR of CKD ( r=-0.317, P<0.001; r=-0.391, P<0.001). Conclusions:Belt and Road countries have substantial disease burdens of CKD, and the prevalence rate of CKD is rising fast. Health cooperation among member states should be strengthened to jointly address the challenges posed by chronic diseases such as CKD.

OBJECTIVES: Firefighters are prone to suffer from psychological trauma and post-traumatic stress disorder (PTSD) in the workplace, and have a poor prognosis after PTSD. Reliable models for predicting PTSD allow for effective identification and intervention for patients with early PTSD. By collecting the psychological traits, psychological states and work situations of firefighters, this study aims to develop a machine learning algorithm with the aim of effectively and accurately identifying the onset of PTSD in firefighters, as well as detecting some important predictors of PTSD onset. METHODS: This study conducted a cross-sectional survey through convenient sampling of firefighters from 20 fire brigades in Changsha, which were evenly distributed across 6 districts and Changsha County, with a total of 628 firefighters. We used the synthetic minority oversampling technique (SMOTE) to process data sets and used grid search to finish the parameter tuning. The predictive capability of several commonly used machine learning models was compared by 5-fold cross-validation and using the area under the receiver operating characteristic curve (ROC-AUC), accuracy, precision, recall, and F1 score. RESULTS: The random forest model achieved good performance in predicting PTSD with an average AUC score at 0.790. The mean accuracy of the model was 90.1%, with an F1 score of 0.945. The three most important predictors were perseverance, forced thinking, and reflective deep thinking, with weights of 0.165, 0.158, and 0.152, respectively. The next most important predictors were employment time, psychological power, and optimism. CONCLUSIONS PTSD onset prediction model for Changsha firefighters constructed by random forest has strong predictive ability, and both psychological characteristics and work situation can be used as predictors of PTSD onset risk for firefighters. In the next step of the study, validation using other large datasets is needed to ensure that the predictive models can be used in clinical setting.
Humans ; Stress Disorders, Post-Traumatic/diagnosis* ; Firefighters/psychology* ; Cross-Sectional Studies ; Algorithms ; Machine Learning

Objective:To explore the changes and influencing factors of psychological distress in patients with primary acute myocardial infarction (AMI) in different periods, and to provide reference for the management of psychological distress in patients with primary AMI.Methods:This was a longitudinal, prospective, observational study. From June 2021 to September 2022, 118 patients with primary AMI in Peking Union Medical College Hospital and Peking University First Hospital were selected as the research objects. The psychological distress level of patients was investigated on the points of 24 hours after illness (T 1), before discharge (T 2), 1 month after discharge (T 3), 3 months after discharge (T 4), 6 months after discharge (T 5) and 12 months after discharge (T 6), and the influencing factors were analyzed. Results:The detection rate of psychological distress in 6 follow-up survey nodes was 66.95% (79/118), 48.31% (57/118), 29.66% (35/118), 24.58% (29/118), 19.49% (23/118) and 15.25% (18/118) respectively. Education level, family per capita income and disease awareness had significant effects on the psychological distress of patients with primary AMI at the time points from T 1 to T 6 ( β values were - 1.262 to - 0.212, all P<0.05). Conclusions:The level of psychological distress in primary AMI patients decreased with time. Nursing staff should pay attention to the trajectory and influencing factors of psychological pain, and formulate targeted intervention measures to reduce the level of psychological pain and promote the comprehensive rehabilitation of patients.

Objective:To assess the ultrasonographic features and potential diseases of fetal abnormal sylvian fissure(SF), and to explore the value of whole-genome sequencing (WGS) in prenatal detection.Methods:A total of 28 fetuses with a sonographic diagnosis of abnormal SF in Shenzhen Maternal and Child Health Hospital Affiliated to Southern Medical University between October 2018 and October 2020 were prospectively included. The fetal brain was evaluated by neuroultrasound and intrauterine MRI in detail. Amniotic fluid/cord blood obtained by amniocentesis or tissue samples from umbilical cord after birth were collected for WGS. Pregnancy outcomes and postnatal MRI were recorded, and neurodevelopment of live-born infants was followed up for more than 24 months after delivery.Results:During the study period, 28 fetuses with abnormal SF were identified, with a gestational age of 21.3-30.0 (24.8±2.0) weeks. Abnormal SF presented in MCD ( n=15, 53.6%), chromosomal anomalies ( n=3, 10.7%) or single-gene genetic syndromes ( n=3, 10.7%) with the affected fetuses showing developmental delay, hydrocephalus or leukomalacia ( n=4, 14.2%), corpus callosal agenesis with large interhemispheric cysts ( n=1, 3.6%), benign subarachnoid space enlargement with arachnoid cysts ( n=1, 3.6%), and multiple malformations ( n=1, 3.6%). Among the 15 cases with MCD, the most common pathology was lissencephaly/pachygyria, followed by schizencephaly, severe microcephaly, hemimegalencephaly with paraventricular heterotopia, and polymicrogyria. Abnormal SF presented bilaterally in 23 fetuses and unilaterally in 5. All cases were categorized into six types depending on SF morphology in the transthalamic section: no plateau-like or a small insula, linear type, irregular corrugated SF, Z-shaped, and cyst occupying type. In addition to abnormal SF, associated anomalies or mild variations were identified in all fetuses. There were 17 cases underwent intrauterine MRI, and 13 cases underwent postnatal MRI examination.And 25 pregnancies were terminated; 3 were born alive, and 2 had typical syndromic changes with poor neurodevelopmental prognosis. A related pathogenic genetic variant was detected in 57.1% (16/28) fetus, and the incidence of single nucleotide variants(SNVs) was 42.9% (12/28), among which de novo SNVs accounted for 91.7% (11/12). Conclusions:Fetal abnormal SF could be classified based on the ultrasonographic features of transthalamic section. Fetal abnormal SF may indicate MCD, some chromosomal abnormalities or single-gene genetic syndromes that may lead to poor neurodevelopmental outcomes, and may be affected by extra-cortical factors. It is suggested to carry out targeted prenatal genetic diagnosis for fetuses with abnormal SF.

This paper reviews the definition, status quo, assessment tools, influencing factors and intervention measures of psychological pain in patients with acute myocardial infarction (AMI), aiming to improve the nursing staff 's attention to psychological pain in patients with acute myocardial infarction and provide a basis for the formulation of psychological pain intervention measures.