8,806 results on '"Pei Chen"'
Search Results
2. Digital health literacy among undergraduate nursing students in China: associations with health lifestyles and psychological resilience
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Linfeng Liu, Mengxue Fu, Jijun wu, Hongyan Wang, Jiaorong Zhao, Pei Chen, Jun Cao, Wen Zhang, Qin Lin, and Ling Li
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Nursing ,Undergraduates ,Digital health literacy ,Health lifestyles ,Psychological resilience ,Special aspects of education ,LC8-6691 ,Medicine - Abstract
Abstract Background Digital health literacy (DHL) is pivotal for individuals to access trustworthy health information and make informed decisions, closely intertwined with health behaviors and psychological resilience—these factors collectively shape an individual’s approach to health management. Despite extensive research on digital health literacy in broader populations, the specific dynamics of digital health literacy in relation to health behaviors and psychological resilience among undergraduate nursing students in China remain understudied, highlighting a gap that this research endeavors to address. This study aims to assess the levels of digital health literacy among undergraduate nursing students in China, and to explore its association with health lifestyles and psychological resilience, which are considered influential factors. Methods Employing a descriptive cross-sectional research design, eligible Chinese nursing undergraduates were surveyed from June to October 2023. This study recruited a total of 418 undergraduate nursing students. After excluding 11 students on leave, 407 students participated in questionnaire completion and submission. The College Students’ Digital Health Literacy Scale, Healthy Lifestyle Assessment Scale and The Psychological Resilience Scale were used in this study. Results The mean scores for digital health literacy, health lifestyles, and psychological resilience were 74.78 ± 8.44, 127.14 ± 11.22, and 79.21 ± 11.02, respectively. Pearson correlation analysis results indicated that the correlations between digital health literacy and both health lifestyles (r = 0.707, P
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- 2024
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3. A new function of offset response in the primate auditory cortex: marker of temporal integration
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Peirun Song, Haoxuan Xu, Hangting Ye, Xinyu Du, Yuying Zhai, Xuehui Bao, Ishrat Mehmood, Hisashi Tanigawa, Wanqiu Niu, Zhiyi Tu, Pei Chen, Tingting Zhang, Xuan Zhao, and Xiongjie Yu
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Biology (General) ,QH301-705.5 - Abstract
Abstract Offset responses are traditionally viewed as indicators of sound cessation. Here, we investigate offset responses to auditory click trains, examining how they are modulated by inter-click intervals (ICIs) and train duration. Using extracellular recordings and electrocorticography (ECoG) in non-human primates, alongside electroencephalography (EEG) in humans, we show that offset responses are significantly influenced by both ICI and train length, thereby establishing them as markers of temporal integration. We introduce the concept of the ‘Neuronal Integrative Window’ (NIW), defined as the temporal span during which neurons integrate stimuli to produce or modulate the temporal integration signal. Our data reveal that on the neuronal level, the auditory cortex (AC) exhibits a more expansive NIW than the medial geniculate body (MGB), integrating stimuli over longer durations and showing a preference for larger ICIs. Furthermore, our results indicate that offset responses could serve as potential biomarkers for neurological and psychiatric conditions, highlighted by their sensitivity to pharmacological modulation with ketamine. This study advances our understanding of auditory temporal processing and proposes a novel approach for assessing and monitoring brain health.
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- 2024
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4. Application of Alfalfa App in the management of oral anticoagulation in patients with atrial fibrillation: a multicenter randomized controlled trial
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Wenlin Xu, Xinhai Huang, Qiwang Lin, Tingting Wu, Chengfu Guan, Meina Lv, Wei Hu, Hengfen Dai, Pei Chen, Meijuan Li, Feilong Zhang, and Jinhua Zhang
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Atrial fibrillation ,Smartphone app ,Mobile health ,Patient education ,Compliance ,Chronic disease management ,Computer applications to medicine. Medical informatics ,R858-859.7 - Abstract
Abstract Background In recent years, mobile medical technology has made great progress in chronic disease management, but its application in patients with atrial fibrillation (AF) still needs to be clarified. Objective This study aims to determine whether the newly developed smartphone app for patients with AF (Alfalfa App) can improve anticoagulation knowledge, drug treatment compliance, and satisfaction of AF patients. Methods Alfalfa App integrates the functions of patient education, remote consultation, and medication reminder through a simple user interface. From June 2020 to December 2020, patients with AF were recruited in five large tertiary hospitals in China. Patients were randomly divided into the Alfalfa App or routine nursing groups. Patients’ knowledge, medication adherence, and satisfaction with anticoagulation were assessed using validated questionnaires at baseline, 1 month, and 3 months. Results In this randomized controlled trial, 113 patients with AF were included, 57 patients were randomly assigned to the Alfalfa App group, and 56 patients were randomly assigned to the routine nursing group. Forty-eight patients in the Alfalfa App group completed a three-month follow-up, and 48 patients in the routine nursing group completed a three-month follow-up. Basic demographic data were comparable between the two groups. The average age of AF patients was 61.65 ± 11.01 years old, and 61.5% of them were male. With time (baseline to 3 months), the knowledge scores of the Alfalfa App group (P
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- 2024
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5. Factors associated with skeletal muscle mass in middle‐aged men living with HIV
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Yide Xu, Dongdong Wang, Pei Chen, Bufeng Qi, Xiaoting Li, Chunfeng Xie, Jieshu Wu, Lin Li, Gu Gao, Shanshan Geng, and Dandan Yang
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Acquired immunodeficiency syndrome ,Human immunodeficiency virus ,Risk factors ,Skeletal muscle mass ,Diseases of the musculoskeletal system ,RC925-935 ,Human anatomy ,QM1-695 - Abstract
Abstract Background Despite extensive research on muscle loss in people living with HIV (PLWH), the prevalence and contributing factors specifically among middle‐aged men remain unclear. This study aimed to determine the prevalence of low muscle mass within this demographic and to identify associated factors. Methods A total of 378 men living with HIV were enrolled in the study. They were classified into low muscle mass group if they displayed a skeletal muscle index (SMI) 0.5, P
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- 2024
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6. Adaptive anti-jamming scheme based on meta-surface antenna
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GUO Yuze, JIN Liang, XU Xiaoming, MA Keming, and PEI Chen
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meta-surface antenna ,main-lobe jamming ,side-lobe jamming ,DOA estimation ,Telecommunication ,TK5101-6720 ,Technology - Abstract
Aiming at the problem that traditional anti-jamming schemes cannot choose suitable anti-jamming strategies according to different types of jamming forms, an adaptive anti-jamming scheme based on meta-surface antenna was proposed. According to the incident direction of the expected signal and the jamming signal, the type of jamming was determined and the targeted anti-jamming scheme was formulated. Firstly, an improved sparsity adaptive matching pursuit (SAMP) algorithm was designed to estimate the direction of arrival (DOA). The multi-dimensional observation capability of meta-surface antenna could be used to estimate the source number and DOA of coherent signal sources with high precision under little snapshot sampling. Secondly, the DOA information of the signal was used to judge the existence of main-lobe interference and sidelobe interference, while the corresponding anti-jamming strategy was selected. When the main-lobe jamming existing, the multi-dimensional observation capability of the meta-surface antenna was used to configure the improved blocking matrix preprocessing structure on the antenna to achieve the main-lobe jamming suppression. When side-lobe jamming existing, a quadratic inequality linear power minimization algorithm was used to realize anti jamming. When two jamming forms exist at the same time, blocking matrix and beamforming were used to resist jamming. The simulation results show that the proposed scheme has better signal interference noise ratio (SINR) improvement for different jamming types. When both main-lobe and side-lobe jamming exist, the gain can be improved by up to 6 dB compared with the traditional scheme.
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- 2024
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7. Interaction between antiretroviral therapy regimens and body mass index on triglyceride levels in people living with HIV: a cross-sectional and longitudinal study
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Yide Xu, Bufeng Qi, Xiaolu Wu, Chen Lu, Pei Chen, Dongdong Wang, Xiaoting Li, Chunfeng Xie, Jieshu Wu, Caiyun Zhong, Lin Li, Gu Gao, Dandan Yang, Ye Ding, and Shanshan Geng
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Body mass index ,Antiretroviral therapy ,Triglyceride ,Interaction ,Nutritional diseases. Deficiency diseases ,RC620-627 - Abstract
Abstract Objective To investigate how antiretroviral therapy (ART) regimens and body mass index (BMI) interact to affect triglyceride (TG) levels in people living with HIV (PLWH). Methods This research involved 451 men living with HIV for cross-sectional analysis, and 132 underwent follow-up assessments in 2021 and 2023. Multivariate logistic regression identified key factors, while covariance regression models assessed interactions between ART regimens and BMI on TG levels. Results The result of this cross-sectional study indicated that advanced AIDS (acquired immune deficiency syndrome) stage (OR = 2.756, P = 0.003), higher BMI (OR = 1.131, P = 0.003), and waist-hip ratio (WHR, OR = 44.684, P = 0.019) are closely associated with high triglyceride levels. Additionally, regimens containing zidovudine (AZT) (OR = 3.927, P
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- 2024
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8. Harmine acts as a quorum sensing inhibitor decreasing the virulence and antibiotic resistance of Pseudomonas aeruginosa
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Pei Chen, Jiangyue Qin, Helene K. Su, Lianming Du, and Qianglin Zeng
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Pseudomonas aeruginosa ,Harmine ,Quorum sensing inhibitors ,Virtual screening ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background As antimicrobial resistance (AMR) has become a global health crisis, new strategies against AMR infection are urgently needed. Quorum sensing (QS), responsible for bacterial communication and pathogenicity, is among the targets for anti-virulence drugs that thrive as one of the promising treatments against AMR infection. Methods We identified a natural compound, Harmine, through virtual screening based on three QS receptors of Pseudomonas aeruginosa (P. aeruginosa) and explored the effect of Harmine on QS-controlled and pathogenicity-related phenotypes including pyocyanin production, exocellular protease excretion, biofilm formation, and twitching motility of P. aeruginosa PA14. The protective effect of Harmine on Caenorhabditis elegans (C. elegans) and mice infection models was determined and the synergistic effect of Harmine combined with common antibiotics was explored. The underlaying mechanism of Harmine’s QS inhibitory effect was illustrated by molecular docking analysis, transcriptomic analysis, and target verification assay. Results In vitro results suggested that Harmine possessed QS inhibitory effects on pyocyanin production, exocellular protease excretion, biofilm formation, and twitching motility of P. aeruginosa PA14, and in vivo results displayed Harmine’s protective effect on C. elegans and mice infection models. Intriguingly, Harmine increased susceptibility of both PA14 and clinical isolates of P. aeruginosa to polymyxin B and kanamycin when used in combination. Moreover, Harmine down-regulated a series of QS controlled genes associated with pathogenicity and the underlying mechanism may have involved competitively antagonizing autoinducers’ receptors LasR, RhlR, and PqsR. Conclusions This study shed light on the anti-virulence potential of Harmine against QS targets, suggesting the possible use of Harmine and its derivates as anti-virulence compounds.
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- 2024
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9. 0.75% ropivacaine may be a suitable drug in pregnant women undergoing urgent cesarean delivery during labor analgesia period
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Xin Men, Qian Wang, Jia-fu Dong, Pei Chen, Xiao-xiao Qiu, Yin-qiu Han, Wei-long Wang, Jin Zhou, Hong-yan Shou, and Zhen-feng Zhou
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Ropivacaine ,Chloroprocaine ,Urgent cesarean delivery ,Epidural ,Anesthesiology ,RD78.3-87.3 - Abstract
Abstract Background 3% chloroprocaine (CP) has been reported as the common local anesthetic used in pregnant women undergoing urgent cesarean delivery during labor analgesia period. However, 0.75% ropivacaine is considered a promising and effective alternative. Therefore, we conducted a randomized controlled trial to compare the effectiveness and safety of 0.75% ropivacaine with 3% chloroprocaine for extended epidural anesthesia in pregnant women. Methods We conducted a double-blind, randomized, controlled, single-center study from November 1, 2022, to April 30, 2023. We selected forty-five pregnant women undergoing urgent cesarean delivery during labor analgesia period and randomized them to receive either 0.75% ropivacaine or 3% chloroprocaine in a 1:1 ratio. The primary outcome was the time to loss of cold sensation at the T4 level. Results There was a significant difference between the two groups in the time to achieve loss of cold sensation (303, 95%CI 255 to 402 S vs. 372, 95%CI 297 to 630 S, p = 0.024). There was no significant difference the degree of motor block (p = 0.185) at the Th4 level. Fewer pregnant women required additional local anesthetics in the ropivacaine group compared to the chloroprocaine group (4.5% VS. 34.8%, p = 0.011). The ropivacaine group had lower intraoperative VAS scores (p = 0.023) and higher patient satisfaction scores (p = 0.040) than the chloroprocaine group. The incidence of intraoperative complications was similar between the two groups, and no serious complications were observed. Conclusions Our study found that 0.75% ropivacaine was associated with less intraoperative pain treatment, higher patient satisfaction and reduced the onset time compared to 3% chloroprocaine in pregnant women undergoing urgent cesarean delivery during labor analgesia period. Therefore, 0.75% ropivacaine may be a suitable drug in pregnant women undergoing urgent cesarean delivery during labor analgesia period. Clinical trial number and registry URL The registration number: ChiCTR2200065201; http://www.chictr.org.cn , Principal investigator: MEN, Date of registration: 31/10/2022.
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- 2024
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10. Exploring the effects of naringin on oxidative stress-impaired osteogenic differentiation via the Wnt/β-catenin and PI3K/Akt pathways
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Hui Wang, Jun Liang, Yiran Wang, Junyuan Zheng, Ying Liu, Yiyang Zhao, Yixuan Ma, Pei Chen, and Xufang Yang
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Osteoporosis ,Naringin ,Oxidative stress ,Wnt/β-catenin signaling pathway ,PI3K/Akt signaling pathway ,Medicine ,Science - Abstract
Abstract This study aimed to explore naringin’s potential to promote the osteogenic differentiation of MC3T3-E1 under oxidative stress. It delved into Nar’s connection with the Wnt/β-catenin and PI3K/Akt signaling pathways. Initially, 2911 OP-related genes were analyzed, revealing close ties with the PI3K/Akt and Wnt pathways alongside oxidative stress. Nar’s potential targets—ESR1, HSP90AA1, and ESR2—were identified through various databases and molecular docking studies confirmed Nar’s affinity with ESR1 and HSP90AA1. Experiments established optimal concentrations for Nar and H2O2. H2O2 at 0.3 mmol/L damaged MC3T3-E1 cells, alleviated by 0.1 µmol/L Nar. Successful establishment of oxidative stress models was confirmed by DCFH-DA probe and NO detection. Nar exhibited the ability to enhance osteogenic differentiation, counteracting oxidative damage. It notably increased osteoblast-related protein expression in MC3T3-E1 cells under oxidative stress. The study found Nar’s positive influence on GSK-3β phosphorylation, β-catenin accumulation, and pathway-related protein expression, all critical in promoting osteogenic differentiation. The research concluded that Nar effectively promotes osteogenic differentiation in MC3T3-E1 cells under oxidative stress. It achieved this by activating the Wnt/β-catenin and PI3K/Akt pathways, facilitating GSK-3β phosphorylation, and enhancing β-catenin accumulation, pivotal in osteogenesis.
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- 2024
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11. Sleep Disturbances in Health Professional Students During the COVID‐19 Pandemic: A Concept Analysis
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Pei Chen, Yuhao Cao, Wirampa Tanglai, Bingqian Zhu, Anne M. Fink, and Bilgay Izci‐Balserak
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concept analysis ,COVID‐19 ,health professional students ,Rodgers' evolutionary ,sleep disturbances ,Nursing ,RT1-120 - Abstract
ABSTRACT Aim The aim is to delineate the concept of sleep disturbances in health professional students during the COVID‐19 pandemic. Design A concept analysis was conducted. Methods A systematic search was conducted for relevant articles published and performed from inception to July 5, 2024. Electronic databases searched included PubMed, Cumulative Index to Nursing and Allied Health Literature (CINAHL), Embase and Web of Science. Rodgers' method of evolutionary concept analysis was used. Results A total of 50 pertinent articles were included in our analysis. Utilising inductive thematic analysis, this study identified attributes, antecedents and consequences of sleep disturbances. Important attributes included insomnia, disrupted sleep patterns, altered sleep duration/nocturnal sleep duration and poor sleep quality. Antecedents encompassed factors such as gender, age/grade levels, physical activity, screen time of digital production, mental health issues, COVID‐19‐related stressors, financial strain and academic stress. Consequences included both mental and physical health implications. By addressing sleep disturbances and promoting better sleep health among students, we can enhance their learning and performance, which could translate to improved patient care outcomes. Additionally, understanding and mitigating sleep disturbances can contribute to the development of a more resilient and effective health care workforce, capable of providing high‐quality care even during crises like the COVID‐19 pandemic. Patient or Public Contribution No patient or public contribution.
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- 2024
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12. Genome-wide identification and functional characterization of fatty acyl desaturase (fads2) gene in Chinese sturgeon (Acipenser sinensis)
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Haoze Ding, Yacheng Hu, Pei Chen, Xin Zhu, Binzhong Wang, Chao Cheng, Tian Tian, Dezhi Zhang, Shuqi Wang, and Yang Li
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fads2 ,Functional characterization ,LC-PUFAs biosynthesis ,Chinese sturgeon (Acipenser sinensis) ,Chondrichthyans ,Aquaculture. Fisheries. Angling ,SH1-691 - Abstract
Fatty acyl desaturases (Fads) are crucial enzymes that catalyze the rate-limiting step of the desaturation reactions by introducing a double bond into to pre-existing fatty acyl chains. As a group of key enzymes involved in the biosynthesis of long-chain polyunsaturated fatty acids (LC-PUFAs), Fads have been well investigated in teleost fishes but they are still rarely known in chondrichthyans. In this study, we first identified a fatty acyl desaturases gene (fads2) from the Chinese sturgeon (Acipenser sinensis), a critically endangered cartilaginous species in China, by combining with bioinformatic analyses and molecular cloning methods. Then, the spatio-temporal distribution patterns, functional characteristics and transcriptional changes of this gene in response to different nutritional conditions were investigated. The coding sequences of the fads2 gene was 1350 bp in length, encoding a protein of 449 amino acids. Multiple protein sequences alignment, genetic synteny and phylogenetic analyses further suggested that fads2 gene was evolutionary conserved. Functional characterization by heterologous expression in yeast showed that Fads2 exhibited Δ6 and Δ8 bifunctional desaturation activities, and possessed capacities to convert 18:2n-6, 18:3n-3, 20:2n-6 and 20:3n-3–18:3n-6, 18:4n-3, 20:3n-6 and 20:4n-3, respectively. In vivo experiment, diets full with C18 PUFA but not LC-PUFA significantly induced the expression levels of fads2 in Chinese sturgeon brain and liver tissues. Our findings suggest that fads2 is an evolutionary and functionally conserved desaturase in Chinese sturgeon, and which plays important roles in regulation of endogenous LC-PUFAs biosynthesis. In summary, these findings will provide a new insight into the evolutionary history of key enzymes of LC-PUFA biosynthesis in vertebrates.
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- 2024
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13. Protocol for behavioral and neural recording in macaques during a novelty detection task
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Xinyu Du, Peirun Song, Yumei Gong, Yuying Zhai, Haoxuan Xu, Hangting Ye, Xuehui Bao, Qianyue Huang, Zhiyi Tu, Pei Chen, Xuan Zhao, David Pérez-González, Manuel S. Malmierca, and Xiongjie Yu
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Neuroscience ,Cognitive Neuroscience ,Behavior ,Science (General) ,Q1-390 - Abstract
Summary: The neural mechanisms of novelty detection, especially in relation to behavior, are currently poorly understood. Here, we present a protocol for recording neuronal activity in macaque auditory cortex during novelty detection tasks. We describe steps for behavioral training, surgical headpost implantation, MRI-based electrode targeting, and electrophysiological recording. These steps allow direct assessment of the correlation between novelty detection behavior and neuronal activity.For complete details on the use and execution of this protocol, please refer to Gong et al.1 : Publisher’s note: Undertaking any experimental protocol requires adherence to local institutional guidelines for laboratory safety and ethics.
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- 2024
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14. The mediating role of perceived social support on the relationship between lack of occupational coping self-efficacy and implicit absenteeism among intensive care unit nurses: a multicenter cross‑sectional study
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Qin Lin, Mengxue Fu, Kun Sun, Linfeng Liu, Pei Chen, Ling Li, Yanping Niu, and Jijun Wu
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Perceived social support ,Lack of occupational coping self-efficacy ,Implicit absenteeism ,Nurse ,Intensive care unit ,Management ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Implicit absenteeism is very common among nurses. Poor perceived social support of intensive care unit nurses has a negative impact on their mental and physical health. There is evidence that lack of occupational coping self-efficacy can promote implicit absenteeism; however, the relationship between lack of occupational coping self-efficacy in perceived social support and implicit absenteeism of intensive care unit nurses is unclear. Therefore, this study aimed to evaluate the role of perceived social support between lack of occupational coping self-efficacy and implicit absenteeism of intensive care unit nurses, and to provide reliable evidence to the management of clinical nurses. Methods A cross-sectional study of 517 intensive care unit nurses in 10 tertiary hospitals in Sichuan province, China was conducted, of which 474 were valid questionnaires with a valid recovery rate of 91.6%. The survey tools included the Chinese version of Implicit Absenteeism Scale, the Chinese version of Perceived Social Support Scale, the Chinese version of Occupational Coping Self-Efficacy Scale and the Sociodemographic characteristics. Descriptive analysis and Pearson correlation analysis were performed using SPSS version 22.0, while the mediating effects were performed using AMOS version 24.0. Results The average of intensive care unit nurses had a total implicit absenteeism score of (16.87 ± 3.98), in this study, the median of intensive care unit nurses’ implicit absenteeism score was 17, there were 210 intensive care unit nurses with low implicit absenteeism (44.3%) and 264 ICU nurses with high implicit absenteeism (55.7%). A total perceived social support score of (62.87 ± 11.61), and a total lack of occupational coping self-efficacy score of (22.78 ± 5.98). The results of Pearson correlation analysis showed that implicit absenteeism was negatively correlated with perceived social support (r = -0.260, P
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- 2024
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15. Multiple factor assessment for determining resting metabolic rate in young adults
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Wanqing Zhou, Hong Su, Jiali Tong, Wenwen Du, Bo Wang, Pei Chen, Hua Wan, and Ming Zhou
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Medicine ,Science - Abstract
Abstract Existing formulas cannot fully explain the variation of resting metabolic rate (RMR). This study aims to examine potential influencing factors beyond anthropometric measurements and develop more accurate equations using accessible parameters. 324 healthy adults (230 females; 18–32 years old) participated in the study. Height, fat-free mass (FFM), fat mass (FM) and RMR were measured. Menstrual cycle, stress levels, living habits, and frequency of consuming caffeinated foods were collected. Measured RMR were compared with predictive values of the new equations and previous 11 equations. Mean RMR for men and women was 1825.2 ± 248.8 and 1345.1 ± 178.7 kcal/day, respectively. RMR adjusted for FFM0.66FM0.066 was positively correlated with BMI. The multiple regression model showed that RMR can be predicted in this population with model 1 (with FFM, FM, age, sex and daily sun exposure duration) or model 2 (with weight and height replacing FFM and FM). The accuracy was 75.31% in the population for predictive model 1 and 70.68% for predictive model 2. The new equations had overall improved performance when compared with existing equations. The predictive formula that consider daily sun exposure duration improve RMR prediction in young adults. Additional investigation is required among individuals in the middle-aged and elderly demographic.
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- 2024
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16. Firing feature-driven neural circuits with scalable memristive neurons for robotic obstacle avoidance
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Yue Yang, Fangduo Zhu, Xumeng Zhang, Pei Chen, Yongzhou Wang, Jiaxue Zhu, Yanting Ding, Lingli Cheng, Chao Li, Hao Jiang, Zhongrui Wang, Peng Lin, Tuo Shi, Ming Wang, Qi Liu, Ningsheng Xu, and Ming Liu
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Science - Abstract
Abstract Neural circuits with specific structures and diverse neuronal firing features are the foundation for supporting intelligent tasks in biology and are regarded as the driver for catalyzing next-generation artificial intelligence. Emulating neural circuits in hardware underpins engineering highly efficient neuromorphic chips, however, implementing a firing features-driven functional neural circuit is still an open question. In this work, inspired by avoidance neural circuits of crickets, we construct a spiking feature-driven sensorimotor control neural circuit consisting of three memristive Hodgkin-Huxley neurons. The ascending neurons exhibit mixed tonic spiking and bursting features, which are used for encoding sensing input. Additionally, we innovatively introduce a selective communication scheme in biology to decode mixed firing features using two descending neurons. We proceed to integrate such a neural circuit with a robot for avoidance control and achieve lower latency than conventional platforms. These results provide a foundation for implementing real brain-like systems driven by firing features with memristive neurons and put constructing high-order intelligent machines on the agenda.
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- 2024
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17. Situational simulation teaching effectively improves dental students’ non-operational clinical competency and objective structured clinical examination performance
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Ju-Hui Wu, Pei Chen Lin, Kun-Tsung Lee, Hsin-Liang Liu, Peih-Ying Lu, and Chen-Yi Lee
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Clinical simulation education ,Simulated patient ,Objective structured clinical examination ,Undergraduate dental students ,Special aspects of education ,LC8-6691 ,Medicine - Abstract
Abstract Background Appropriate communication with dental patients enhances treatment outcomes and patient satisfaction. Implementing simulated patient interviews courses can improve patient-centered care and reduce conflict during clerkship training. Therefore, this study explored the relationship among student participation in a situational simulation course (SSC), academic performance, clerkship performance, and objective structured clinical examination (OSCE) performance. Methods This study was conducted with a sample of fifth-year dental students undergoing clerkship training. After implementing a situational simulation course to investigate the relationship among participation in SSC, academic performance, clerkship performance, and OSCE performance, a path analysis model was developed and tested. Results Eighty-seven fifth-year dental students were eligible for the SSC, and most (n = 70, 80.46%) volunteered to participate. The path analysis model revealed that academic performance had a direct effect on OSCE performance (β = 0.281, P = 0.003) and clerkship performance (β = 0.441, P
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- 2024
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18. Glutaminolysis regulates endometrial fibrosis in intrauterine adhesion via modulating mitochondrial function
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Pei Chen, Chaoshuang Ye, Yunke Huang, Bingning Xu, Tianyu Wu, Yuanhang Dong, Yang Jin, Li Zhao, Changchang Hu, Jingxia Mao, and Ruijin Wu
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Glutaminolysis ,Mitochondria ,Endometrial stromal cell ,Endometrial fibrosis ,Intrauterine adhesion ,Biology (General) ,QH301-705.5 - Abstract
Abstract Background Endometrial fibrosis, a significant characteristic of intrauterine adhesion (IUA), is caused by the excessive differentiation and activation of endometrial stromal cells (ESCs). Glutaminolysis is the metabolic process of glutamine (Gln), which has been implicated in multiple types of organ fibrosis. So far, little is known about whether glutaminolysis plays a role in endometrial fibrosis. Methods The activation model of ESCs was constructed by TGF-β1, followed by RNA-sequencing analysis. Changes in glutaminase1 (GLS1) expression at RNA and protein levels in activated ESCs were verified experimentally. Human IUA samples were collected to verify GLS1 expression in endometrial fibrosis. GLS1 inhibitor and glutamine deprivation were applied to ESCs models to investigate the biological functions and mechanisms of glutaminolysis in ESCs activation. The IUA mice model was established to explore the effect of glutaminolysis inhibition on endometrial fibrosis. Results We found that GLS1 expression was significantly increased in activated ESCs models and fibrotic endometrium. Glutaminolysis inhibition by GLS1 inhibitor bis-2-(5-phenylacetamido-1,2,4-thiadiazol-2-yl) ethyl sulfide (BPTES or glutamine deprivation treatment suppressed the expression of two fibrotic markers, α-SMA and collagen I, as well as the mitochondrial function and mTORC1 signaling in ESCs. Furthermore, inhibition of the mTORC1 signaling pathway by rapamycin suppressed ESCs activation. In IUA mice models, BPTES treatment significantly ameliorated endometrial fibrosis and improved pregnancy outcomes. Conclusion Glutaminolysis and glutaminolysis-associated mTOR signaling play a role in the activation of ESCs and the pathogenesis of endometrial fibrosis through regulating mitochondrial function. Glutaminolysis inhibition suppresses the activation of ESCs, which might be a novel therapeutic strategy for IUA.
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- 2024
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19. Edge-based relative entropy as a sensitive indicator of critical transitions in biological systems
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Renhao Hong, Yuyan Tong, Huisheng Liu, Pei Chen, and Rui Liu
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Critical transition of complex disease ,Edge-based relative entropy ,Direct interaction networks ,Edge-biomarker ,Dynamic systems ,Informational entropy ,Medicine - Abstract
Abstract Background Disease progression in biosystems is not always a steady process but is occasionally abrupt. It is important but challenging to signal critical transitions in complex biosystems. Methods In this study, based on the theoretical framework of dynamic network biomarkers (DNBs), we propose a model-free method, edge-based relative entropy (ERE), to identify temporal key biomolecular associations/networks that may serve as DNBs and detect early-warning signals of the drastic state transition during disease progression in complex biological systems. Specifically, by combining gene‒gene interaction (edge) information with the relative entropy, the ERE method converts gene expression values into network entropy values, quantifying the dynamic change in a biomolecular network and indicating the qualitative shift in the system state. Results The proposed method was validated using simulated data and real biological datasets of complex diseases. The applications show that for certain diseases, the ERE method helps to reveal so-called “dark genes” that are non-differentially expressed but with high ERE values and of essential importance in both gene regulation and prognosis. Conclusions The proposed method effectively identified the critical transition states of complex diseases at the network level. Our study not only identified the critical transition states of various cancers but also provided two types of new prognostic biomarkers, positive and negative edge biomarkers, for further practical application. The method in this study therefore has great potential in personalized disease diagnosis.
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- 2024
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20. Advances in the Application of Plant Chromosome Rearrangement in Crop Genetic Improvement
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Jiao XUE, Qingfeng ZHU, Pei CHEN, Yanzhao FENG, and Yang YU
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chromosome rearrangement ,crop ,breeding ,gene editing ,genetic diversity ,genetic improvement ,Agriculture - Abstract
Chromosome rearrangement is a mechanism that can lead to the loss, duplication, translocation and inversion of DNA segments, thereby altering the genomic structure and providing possibilities for creating new variable traits. Accurate identification of plant chromosome rearrangement events contributes to a deeper understanding of the structure and function of the plant genomes as well as their roles in plant evolution and crop breeding. This review delves into the fundamental concepts of plant chromosome rearrangement, presenting both naturally occurring and artificially induced techniques. It elucidates the cytological, molecular genetic and high-throughput sequencing identification methods for plant chromosome rearrangement. We systematically summarize the application of plant chromosome rearrangement techniques in crop genetic breeding, emphasizing the superiority and practical implementation of chromosome rearrangement in increasing genetic diversity, improving essential traits and enhancing environmental adaptability of crops. However, the occurrence probability of chromosome rearrangement is relatively low currently, posing technical challenges that necessitate more precise tools and strategies for the accurate positioning and rearrangement of chromosomal fragments. By comprehensively understanding chromosome rearrangement and its related technologies, researchers and breeders can better leverage the plant genome, providing innovative solutions for global food security and sustainable environmental development. These researches not only open new approach for a deeper understanding of the plant genome but also lay a solid foundation for future innovations in crop breeding. Through tapping into the diversity and plasticity of the plant genome, chromosome rearrangement technology holds the potential to offer more possibilities for cultivating high-yielding, superior-quality and resistant crop varieties, addressing the increasingly critical issues of global food security and climate adaptability.
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- 2024
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21. Intraoperative enteroscopy using a disposable single-use sterile endoscope
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Guanyi Liu, MD, Pei Chen, MD, Shuai Zuo, MD, Yingchao Wu, MD, Wanyin Hou, MD, YunLong Cai, MD, and Long Rong, MD
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Diseases of the digestive system. Gastroenterology ,RC799-869 - Published
- 2024
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22. Materials properties and device applications of semiconducting bismuth oxyselenide
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Menglu Li, Pei Chen, Yan Zhao, Mei Zhao, Huaqian Leng, Yong Wang, Sharafat Ali, Fazal Raziq, Xiaoqiang Wu, Jiabao Yi, Haiyan Xiao, and Liang Qiao
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bismuth oxyselenide ,device applications ,preparation methods ,properties ,two‐dimensional material ,Materials of engineering and construction. Mechanics of materials ,TA401-492 ,Information technology ,T58.5-58.64 - Abstract
Abstract Layered two‐dimensional (2D) materials have garnered marvelous attention in diverse fields, including sensors, capacitors, nanocomposites and transistors, owing to their distinctive structural morphologies and superior physicochemical properties. Recently, layered quasi‐2D materials, especially layered bismuth oxyselenide (Bi2O2Se), are of particular interest, because of their different interlayer interactions from other layered 2D materials. On this basis, this material offers richer and more intriguing physics, including high electron mobility, sizeable bandgap, and remarkable thermal and chemical durability, rendering it an utterly prospective contender for use in advanced electronic and optoelectronic applications. Herein, this article reviews the recent advances related with Bi2O2Se. Initially, its structural characterization, band structure, and basic properties are briefly introduced. Further, the synthetic strategies for the preparation of Bi2O2Se are presented. Furthermore, the diverse applications of Bi2O2Se in the field of electronics and optoelectronics, photocatalytic, solar cells and sensing were summarized in detail. Ultimately, the challenges and future perspectives of Bi2O2Se are included.
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- 2024
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23. The causal relationship between sleep and risk of psychiatric disorders: A two-sample mendelian randomization study
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Pei Chen, Jiuhang Qin, Yueying Wang, Jinjin Yuan, Yang Pan, and Bingqian Zhu
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sleep ,psychiatric disorder ,major depressive disorder ,schizophrenia ,attention-deficit/hyperactivity disorder ,mendelian randomization ,Genetics ,QH426-470 - Abstract
IntroductionSleep is associated with psychiatric disorders. However, their causality remains unknown.MethodsThe study explored the causal relationship between seven sleep parameters (sleep duration, insomnia, sleep apnea, chronotype, daytime dozing, napping during the day, and snoring) and three psychiatric disorders including major depressive disorder (MDD), schizophrenia, and attention-deficit/hyperactivity disorder (ADHD) using two-sample Mendelian randomization (MR). Genome-wide association study (GWAS) summary data for sleep parameters were obtained from the United Kingdom biobank, FinnGen biobank, and EBI databases. MR-Egger, weighted median, inverse-variance weighted (IVW), simple mode, weighted mode, maximum likelihood, penalized weighted median, and IVW(fixed effects) were used to perform the MR analysis. The heterogeneity was detected by Cochran’s Q statistic. The horizontal pleiotropy was detected by MR Egger. The sensitivity was investigated by the leave-one-out analysis.ResultsInsomnia (OR = 2.02, 95%CI = 1.34–3.03, p = 0.001, False-discovery rate (FDR) corrected p-value = 0.011) and napping during the day (OR = 1.81, 95%CI = 1.34–2.44, FDR corrected p-value
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- 2024
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24. Effects of Feeding Strategy on Growth, Digestive Enzymes, and Liver Structure in Juvenile Coreius guichienoti
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Yu ZHAO, Huantao QU, Pei CHEN, Xuebao LU, Baifu GUO, and Zhihao WEN
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coreius guichenoti ,feeding level ,feeding frequency ,growth performance ,digestive enzyme ,liver section ,Aquaculture. Fisheries. Angling ,SH1-691 - Abstract
The rare and endemic largemouth bronze gudgeon (Coreius guichenoti) inhabits the middle and upper reaches of the Yangtze River. It is a typical migratory river fish found in the vicinity of rapids. Over the years, the construction of water conservancy facilities and overfishing by humans have harmed the ecological habitat of this species, resulting in a considerable population decline. Thus, the largemouth bronze gudgeon has emerged as an important conservation objective and artificial stocking target for protecting and restoring the ecological environment in the Yangtze River Basin. Artificial stocking is one of the most effective methods for restoring the population of rare and endangered fish, and it is widely used domestically and abroad. Culturing a healthy and sufficient number of fry is critical to stocking success. In the production of largemouth bronze gudgeon, the formulation of an effective feeding strategy plays an important role. A scientific and reasonable feeding rate and frequency serve as guidelines for improving the production and quality of cultured fry, which directly impact the survival rate, growth performance, and feed consumption of fish. In order to determine the appropriate feeding strategy for improving fry breeding efficiency, an 8-week feeding trial in a 5 × 2 two-factorial design was conducted to investigate the effects of feeding levels (1%, 2%, 3%, 4%, and 5%) and feeding frequency (2 and 3 times/d) on growth, whole-body composition, digestive enzyme activity, and liver structure of juvenile largemouth bronze gudgeons with an initial weight of (4.91±0.11) g. The results were as follows: After 8 weeks of culture, the survival status of largemouth bronze gudgeon in each treatment group was good. Only two fish mortalities were observed, one in each of the two feeding frequency groups at the 5% feeding level. There was no mortality in the other groups. Feeding level, feeding frequency, and the interaction of the two items had significant effects on the weight gain rate (WGR), specific growth rate (SGR), and feed efficiency (FE) of individuals, whereas only the feeding frequency had significant effects on the condition factor (CF) and viscerosomatic index (VSI). WGR and SGR significantly increased with the feeding level. Meanwhile, the FE increased with increasing feeding levels and then stabilized at the 3% feeding level. Fish fed 3 times/d had higher WGR, SGR, and FE than fish fed 2 times/d when feeding levels did not exceed 3%. As feeding frequency increased, the CF and VSI of individuals tended to decrease. Both whole-body moisture content and crude fat content were significantly affected by the feeding level. The increase in feeding level decreased the whole-body moisture content while increasing the whole-body crude fat content. Digestive enzymes in the foregut of individuals were not significantly affected by feeding level, feeding frequency, or their interactions; however, the feeding level had significant effects on hepatic trypsin (TPS) and lipase (LPS) activities. Increasing feeding levels considerably reduced the TPS activity when the feeding levels were higher than 3%, whereas the LPS activity initially increased and then decreased with increasing feeding levels at a feeding frequency of 3 times/d. Hepatic HE staining revealed that the hepatocytes of fish fed 2 times/d continued to increase in size and progressively swelled and vacuolated, exhibiting indications of a fatty liver when the feeding level reached 3% and increased further. Hepatocytes of fish fed 3 times/d were surrounded by a large number of round and ovoid lipid droplets at the 3% and 4% feeding levels, but there were no discernible changes in the structure of the cells. When the feeding level reached 5%, hepatocytes began to enlarge and swell in groups at a feeding frequency of 3 times/d, but to a lesser extent than the groups fed 2 times/d. In conclusion, under the conditions of this experiment, a comprehensive assessment of growth performance, feed utilization efficiency, and hepatic health revealed that feeding juvenile largemouth bronze gudgeons three times daily at a level of 3% body weight was the optimal feeding strategy. The objective of this study was to determine the optimal feeding strategy for the fry culturing process. The findings provide theoretical guidelines for the artificial reproduction of largemouth bronze gudgeon and contribute to the recovery of its native population. Additionally, as a species that inhabits torrential habitats, the largemouth bronze gudgeon possesses distinct digestive and physiological properties. This study lays the foundation and groundwork for future research on the nutritional requirements, feed production, and artificial breeding of these species.
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- 2024
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25. The roles of macrophage migration inhibitory factor in retinal diseases
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Hongbing Zhang, Xianjiao Zhang, Hongsong Li, Bing Wang, Pei Chen, and Jiamin Meng
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diabetic retinopathy ,glaucoma ,macrophage migration inhibitory factor ,migration inhibitory factor receptor ,optic neuropathy ,retinal degeneration ,retinal neovascular ,uveal melanoma ,uveitis ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Macrophage migration inhibitory factor (MIF), a multifunctional cytokine, is secreted by various cells and participates in inflammatory reactions, including innate and adaptive immunity. There are some evidences that MIF is involved in many vitreoretinal diseases. For example, MIF can exacerbate many types of uveitis; measurements of MIF levels can be used to monitor the effectiveness of uveitis treatment. MIF also alleviates trauma-induced and glaucoma-induced optic nerve damage. Furthermore, MIF is critical for retinal/choroidal neovascularization, especially complex neovascularization. MIF exacerbates retinal degeneration; thus, anti-MIF therapy may help to mitigate retinal degeneration. MIF protects uveal melanoma from attacks by natural killer cells. The mechanism underlying the effects of MIF in these diseases has been demonstrated: it binds to cluster of differentiation 74, inhibits the c-Jun N-terminal kinase pathway, and triggers mitogen-activated protein kinases, extracellular signal-regulated kinase-1/2, and the phosphoinositide-3-kinase/Akt pathway. MIF also upregulates Toll-like receptor 4 and activates the nuclear factor kappa-B signaling pathway. This review focuses on the structure and function of MIF and its receptors, including the effects of MIF on uveal inflammation, retinal degeneration, optic neuropathy, retinal/choroidal neovascularization, and uveal melanoma.
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- 2024
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26. Simultaneously Tuning Charge Separation and Surface Reaction Kinetics on ZnIn2S4 Photoanode by P-Doping for Highly Efficient Photoelectrochemical Water Splitting and Urea Oxidation
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Jiamin Sun, Ling Tang, Chenglong Li, Jingjing Quan, Li Xu, Xingming Ning, Pei Chen, Qiang Weng, Zhongwei An, and Xinbing Chen
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charge recombination ,sulfur vacancies ,element doping ,charge transfer ,photoelectrochemical ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
ZnIn2S4 nanosheets are a promising photoanode for driving photoelectrochemical (PEC) hydrogen fuel production; nevertheless, poor charge separation and sluggish surface reaction kinetics hinder its PEC performance to an extreme degree. Herein, a facile element doping strategy (i.e., P element) was developed to obtain the desired photoanode. As a result, the ZnIn2S4-P (ZIS-P5) photoanode exhibits a remarkable photocurrent density of 1.66 mA cm−2 at 1.23 V versus a reversible hydrogen electrode (VRHE) and a much lower onset potential of 0.12 V vs. RHE for water oxidation. Careful electrochemical analysis confirms that the P doping and sulfur vacancies (Sv) not only facilitate the hole transfer, but also boost surface reaction kinetics. Finally, the “killing two birds with one stone” goal can be achieved. Moreover, the optimized photoanode also presents high PEC performance for urea oxidation, obtaining a photocurrent density of 4.13 mA cm−2 at 1.23 V vs. RHE. This work provides an eco-friendly, simple and effective method to realize highly efficient solar-to-hydrogen conversion.
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- 2024
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27. Co-culture of STRO1 + human gingival mesenchymal stem cells and human umbilical vein endothelial cells in 3D spheroids: enhanced in vitro osteogenic and angiogenic capacities
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Yushan Liu, Pei Chen, Tengfei Zhou, Jincheng Zeng, Ziyi Liu, Ruijie Wang, Yiwei Xu, Wuwei Yin, and Mingdeng Rong
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Gingival mesenchymal stem cells ,human umbilical Vein endothelial cells ,STRO1 ,three-dimensional culture ,stem cell spheroids ,osteogenic differentiation ,Biology (General) ,QH301-705.5 - Abstract
Stem cell spheroid is a promising graft substitute for bone tissue engineering. Spheroids obtained by 3D culture of STRO1+ Gingival Mesenchymal Stem Cells (sGMSCs) (sGMSC spheroids, GS) seldom express angiogenic factors, limiting their angiogenic differentiation in vivo. This study introduced a novel stem cell spheroid with osteogenic and angiogenic potential through 3D co-culture of sGMSCs and Human Umbilical Vein Endothelial Cells (HUVECs) (sGMSC/HUVEC spheroids, GHS). GHS with varying seeding ratios of sGMSCs to HUVECs (GHR) were developed. Cell fusion within the GHS system was observed via immunofluorescence. Calcein-AM/PI staining and chemiluminescence assay indicated cellular viability within the GHS. Furthermore, osteogenic and angiogenic markers, including ALP, OCN, RUNX2, CD31, and VEGFA, were quantified and compared with the control group comprising solely of sGMSCs (GS). Incorporating HUVECs into GHS extended cell viability and stability, initiated the expression of angiogenic factors CD31 and VEGFA, and upregulated the expression of osteogenic factors ALP, OCN, and RUNX2, especially when GHS with a GHR of 1:1. Taken together, GHS, derived from the 3D co-culture of sGMSCs and HUVECs, enhanced osteogenic and angiogenic capacities in vitro, extending the application of cell therapy in bone tissue engineering.
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- 2024
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28. Feeding frequency affects liver health in largemouth bronze gudgeon Coreius guichenoti: Implications for lipid metabolism, oxidative stress, and inflammation response
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Jian Zhu, Yu Zhao, Jing Yang, Yang Li, Pei Chen, and Huantao Qu
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Largemouth bronze gudgeon ,Feeding frequency ,Glycolipid metabolism ,Oxidative stress ,Inflammatory response ,Aquaculture. Fisheries. Angling ,SH1-691 - Abstract
In artificial breeding, feeding frequency is crucial for maintaining the liver health status in largemouth bronze gudgeon (Coreius guichenoti). Nevertheless, the underlying mechanism governing this relationship remains unclear. The present study aimed to elucidate the effects of feeding frequencies (2 T/D, 2 times day-1; 3 T/D, 3 times day-1) on the liver health of Coreius guichenoti. Groups of juveniles (60 fish group-1) with an initial body weight of 4.91 ± 0.11 g were randomly assigned to 6 tanks. Fish were fed with 2 T/D and 3 T/D for 8 weeks at a feeding rate of 3%. The results showed that the SGR and FER of the 3 T/D were higher than those of the 2 T/D (P
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- 2024
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29. Corrigendum: Distinct characteristics and prognosis of IgA nephropathy patients with nephrotic syndrome: a propensity score-matched cohort study
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Yuanyuan Jiang, Pei Chen, Wenjing Zhao, Lijun Liu, Sufang Shi, Jicheng Lv, and Hong Zhang
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IgA nephropathy ,nephrotic syndrome ,proteinuria ,hypoalbuminemia ,complement ,Medicine (General) ,R5-920 - Published
- 2024
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30. Heterozygous mutations in factor H aggravate pathological damage in a stable IgA deposition model induced by Lactobacillus casei cell wall extract
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Jingyi Li, Yaping Dong, Feifei Chen, Hongyu Yang, Pei Chen, Hongyu Li, Sufang Shi, Xujie Zhou, Li Zhu, Yuemiao Zhang, Lijun Liu, Xinfang Xie, Feng Yu, Jing Jin, Jicheng Lv, and Hong Zhang
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IgA nephropathy ,complement factor H ,mouse model ,the alternative complement pathway ,proteinuria ,Immunologic diseases. Allergy ,RC581-607 - Abstract
IntroductionActivation of complement through the alternative pathway (AP) has a key role in the pathogenesis of IgA nephropathy (IgAN). We previously showed, by intraperitoneal injection of Lactobacillus casei cell wall extract (LCWE), C57BL/6 mice develop mild kidney damage in association with glomerular IgA deposition. To further address complement activity in causing glomerular histological alterations as suggested in the pathogenesis of IgAN, here we used mice with factor H mutation (FHW/R) to render AP overactivation in conjunction with LCWE injection to stimulate intestinal production of IgA.MethodsDose response to LCWE were examined between two groups of FHW/R mice. Wild type (FHW/W) mice stimulated with LCWE were used as model control.ResultsThe FHW/R mice primed with high dose LCWE showed elevated IgA and IgA-IgG complex levels in serum. In addition to 100% positive rate of IgA and C3, they display elevated biomarkers of kidney dysfunction, coincided with severe pathological lesions, resembling those of IgAN. As compared to wild type controls stimulated by the same high dose LCWE, these FHW/R mice exhibited stronger complement activation in the kidney and in circulation.DiscussionThe new mouse model shares many disease features with IgAN. The severity of glomerular lesions and the decline of kidney functions are further aggravated through complement overactivation. The model may be a useful tool for preclinical evaluation of treatment response to complement-inhibitors.
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- 2024
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31. The relationship between daytime napping and glycemic control in people with type 2 diabetes
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Jinjin Yuan, Jinle Wang, Yingdan Chen, Min Zhang, Aimei Zhao, Jing Du, Jiahui Zhang, Fan Liu, Yueying Wang, Pei Chen, and Bingqian Zhu
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diabetes ,nap ,sleep ,glycemic control ,HbA1c ,Diseases of the endocrine glands. Clinical endocrinology ,RC648-665 - Abstract
AimTo examine the association between napping characteristics and glycemic control in people with type 2 diabetes.DesignThis study used a cross-sectional design.MethodsA convenience sample of people with type 2 diabetes (N=226) were included. Glycemic control was indicated by HbA1c which was measured by A1C Now®+. Napping characteristics including napping frequency, duration, timing, and type were measured by validated questionnaires. Other variables, such as insomnia, cognitive impairment, and depression were measured by the Insomnia Severity Index, Montreal Cognitive Assessment, and Patient Health Questionnaire-9, respectively. Multivariate linear regression analyses were performed.ResultsThe sample consisted of 122 women (54.0%), with a median age of 67 years. Their median HbA1c was 6.8%. No significant relationship was found between napping frequency and HbA1c. Among nappers, after controlling for covariates, long napping duration (≥60 min) and morning napping were both associated with poorer glycemic control. Compared with appetitive napping, restorative napping was associated with better glycemic control.ConclusionDaytime napping (e.g., duration and type) is an important modifiable factor for glycemic control in people with type 2 diabetes. This study provides new insights into the relationship between napping and glucose management among people with diabetes.
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- 2024
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32. Neural correlates of novelty detection in the primary auditory cortex of behaving monkeys
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Yumei Gong, Peirun Song, Xinyu Du, Yuying Zhai, Haoxuan Xu, Hangting Ye, Xuehui Bao, Qianyue Huang, Zhiyi Tu, Pei Chen, Xuan Zhao, David Pérez-González, Manuel S. Malmierca, and Xiongjie Yu
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CP: Neuroscience ,Biology (General) ,QH301-705.5 - Abstract
Summary: The neural mechanisms underlying novelty detection are not well understood, especially in relation to behavior. Here, we present single-unit responses from the primary auditory cortex (A1) from two monkeys trained to detect deviant tones amid repetitive ones. Results show that monkeys can detect deviant sounds, and there is a strong correlation between late neuronal responses (250–350 ms after deviant onset) and the monkeys’ perceptual decisions. The magnitude and timing of both neuronal and behavioral responses are increased by larger frequency differences between the deviant and standard tones and by increasing the number of standard tones preceding the deviant. This suggests that A1 neurons encode novelty detection in behaving monkeys, influenced by stimulus relevance and expectations. This study provides evidence supporting aspects of predictive coding in the sensory cortex.
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- 2024
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33. Automated and reusable deep learning (AutoRDL) framework for predicting response to neoadjuvant chemotherapy and axillary lymph node metastasis in breast cancer using ultrasound images: a retrospective, multicentre studyResearch in context
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Jingjing You, Yue Huang, Lizhu Ouyang, Xiao Zhang, Pei Chen, Xuewei Wu, Zhe Jin, Hui Shen, Lu Zhang, Qiuying Chen, Shufang Pei, Bin Zhang, and Shuixing Zhang
- Subjects
Breast cancer ,Ultrasound ,Deep learning ,Neoadjuvant chemotherapy ,Lymph node metastasis ,Medicine (General) ,R5-920 - Abstract
Summary: Background: Previous deep learning models have been proposed to predict the pathological complete response (pCR) and axillary lymph node metastasis (ALNM) in breast cancer. Yet, the models often leveraged multiple frameworks, required manual annotation, and discarded low-quality images. We aimed to develop an automated and reusable deep learning (AutoRDL) framework for tumor detection and prediction of pCR and ALNM using ultrasound images with diverse qualities. Methods: The AutoRDL framework includes a You Only Look Once version 5 (YOLOv5) network for tumor detection and a progressive multi-granularity (PMG) network for pCR and ALNM prediction. The training cohort and the internal validation cohort were recruited from Guangdong Provincial People’s Hospital (GPPH) between November 2012 and May 2021. The two external validation cohorts were recruited from the First Affiliated Hospital of Kunming Medical University (KMUH), between January 2016 and December 2019, and Shunde Hospital of Southern Medical University (SHSMU) between January 2014 and July 2015. Prior to model training, super-resolution via iterative refinement (SR3) was employed to improve the spatial resolution of low-quality images from the KMUH. We developed three models for predicting pCR and ALNM: a clinical model using multivariable logistic regression analysis, an image model utilizing the PMG network, and a combined model that integrates both clinical and image data using the PMG network. Findings: The YOLOv5 network demonstrated excellent accuracy in tumor detection, achieving average precisions of 0.880–0.921 during validation. In terms of pCR prediction, the combined modelpost-SR3 outperformed the combined modelpre-SR3, image modelpost-SR3, image modelpre-SR3, and clinical model (AUC: 0.833 vs 0.822 vs 0.806 vs 0.790 vs 0.712, all p
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- 2024
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34. Variability and determinants of secondary metabolite profiles in cranberry (Vaccinium macrocarpon) from Wisconsin and New Jersey
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Ping Geng, James M. Harnly, Jianghao Sun, James Polashock, Nicholi Vorsa, and Pei Chen
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Factorial multivariate analysis of variance ,PCA ,Citric acid ,Quinic acid ,Flavonoid ,Iridoid ,Agriculture (General) ,S1-972 ,Nutrition. Foods and food supply ,TX341-641 - Abstract
A comprehensive analysis was conducted on 112 fruit samples harvested in 2019 from six different cultivars of cranberry (Vaccinium macrocarpon Ait.). These cranberry crops were cultivated in both New Jersey and Wisconsin, under the management of diverse growers. The six cultivars investigated include Stevens (ST), Crimson Queen (CQ), Demoranville (DM), Mullica Queen (MQ), Welker (WE), and Haines (HA). This study delved into the variability and determinants of secondary metabolite profiles in cranberry. Fuzzy chromatograph mass spectrometry (FCMS) and ultra-high performance liquid chromatography high-resolution accurate-mass multistage mass spectrometry (UHPLC-HRAM-MSn) were used for analysis. Factorial multivariate analysis of variance (MANOVA)-principal component analysis (PCA) was employed to assess six experimental factors, including cultivar, cranberry growing state, grower, harvest times, and both analytical and biological replicates. The most substantial influence on the overall variability was observed with respect to cultivars and cultivation states. Specifically, the factor “cultivar” contributed 16.3 % to the total variance in the polar chemical profile, while the factor “state” contributed 31.5 %. Similarly, in the less polar chemical profile, the contributions were 29.0 % for “cultivar” and 22.3 % for “state” to the total variance. Consequently, the primary objective of this study was to examine the variations in the relative contents of secondary metabolite among cranberries cultivated in New Jersey and Wisconsin. The findings revealed that geographic factors exerted a significant effect on the levels of certain organic acids, flavonol glycosides, and iridoids even within the same cranberry cultivar.
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- 2024
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35. A new method for restoration of sedimentary paleogeomorphology based on lithofacies and geochemistry: A case study of the Qixia Formation in central Sichuan
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Shiyi Rao, Meiyan Fu, Hucheng Deng, Dong Wu, Wang Xu, Pei Chen, and Hengwei Guo
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sedimentary paleogeomorphology ,qixia formation ,sedimentary sequences ,lithofacies ,geochemistry ,Geology ,QE1-996.5 ,Engineering geology. Rock mechanics. Soil mechanics. Underground construction ,TA703-712 - Abstract
Objective The sedimentary palaeogeomorphology of the Permian Qixia Formation in Sichuan Basin has key influence over the distribution and evolution of carbonate reservoirs. Restoring and characterizing the sedimentary palaeogeomorphology of Gaoshiti area can gain further understanding of the distribution of favorable sedimentary facies and predict the distribution of high-quality reservoirs. Methods Based on the division of the third-order sequence, the high-resolution sequence stratigraphic framework was established by using geochemical proxies, petrological markers and logging markers. Two kinds of sedimentary microfacies, i.e. beach core and beach wing, were also identified. In addition, this study has calculated the difference of layer thicknesses in the sequence, and has identified different types of sedimentary sequences. A number of values including the beach core/beach wing value, Fe/Mn and MgO/Al2O3 ratios and other geochemical parameters were also calculated. The characteristics of the above parameters on the plane are analyzed and re-evaluated, which are all used to restore the palaeogeomorphic characteristics of the sedimentary period of the Qixia Formation in the study area. Results The result of research shows that the palaeogeomorphic characteristics of the 1st Member of Qixia are higher in the northwest and south, lower in the middle, and the palaeogeomorphic drop is obvious. Our new results show that the palaeogeomorphic highlands of the 2nd Member of Qixia are distributed in the middle of the study area, that the western palaeogeomorphology is low, and that the overall difference of palaeogeomorphology is small. Conclusion According to the results of ancient landform restoration, Gaoshiti-Moxi area forms a shallow water ring zone in the northeast-southwest direction where granular shoals are developed. Local micro-positive structures and granular shoals are developed in the south. However, the distribution of micro-positive structures is so limit that the extension range of granular shoals is limit. This study highlights that future exploration and development should focus on the development area of granular shoals in the northeast-southwest direction.
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- 2023
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36. Effects of Feeding Rates on Growth Performance and Liver Glucose Metabolism in Juvenile Largemouth Bronze Gudgeon (Coreius guichenoti)
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Pei Chen, Huantao Qu, Jing Yang, Yu Zhao, Xu Cheng, and Wei Jiang
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largemouth bronze gudgeon ,growth performance ,glycolysis ,gluconeogenesis ,glycogen ,Veterinary medicine ,SF600-1100 ,Zoology ,QL1-991 - Abstract
The experiment was conducted to investigate the effects of feeding rates on growth performance, liver glycolysis, gluconeogenesis, glycogen synthesis, and glycogen decomposition in juvenile largemouth bronze gudgeon (Coreius guichenoti). A total number of 600 fish were randomly distributed into 12 cylindrical plastic tanks with 50 fish per tank and triplicate tanks per treatment. Fish were fed with 2%, 3%, 4%, and 5% feeding rates (body weight per day) three times day−1 for 8 w. The results indicated that the feeding rates significantly increased the body weight, weight gain rate, and specific growth rate (p < 0.05), while showing no significant effects on the condition factor and survival rate (p > 0.05). The feed conversion ratio was significantly enhanced by the feeding rate (p < 0.05), although no significant differences were observed when the feeding rate exceeded 3% (p > 0.05). The plasma glucose levels in the 4% and 5% groups were significantly higher than those in the 2% and 3% groups. Compared with other groups, the 5% group significantly increased the crucial rate-limiting enzyme activities and mRNA levels of glycolysis (PFKL and PK) (p < 0.05), while showing no significant differences on enzyme activities (PC, PEPCK, and G6P) and mRNA (pepck and g6p) levels of gluconeogenesis (p > 0.05). In addition, the mRNA levels of hepatic glut2 and glut4 in the 5% group reached the highest levels (p < 0.05). When the feeding rate exceeded 3%, hepatic glycogen and lipid accumulation were significantly increased, leading to a fatty liver phenotype. Meanwhile, the mRNA level of liver glycogen synthetase (gysl) was significantly increased (p < 0.05), while no significant difference was observed in glycogen phosphorylase (pygl) (p > 0.05). In summary, under the conditions of this study, a feeding rate exceeding 3% significantly accelerated hepatic glycogen and lipid accumulation, which ultimately induced fatty liver formation.
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- 2024
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37. Investigation into the Synergistic Effect of the Zinc Peroxide/Peroxymonosulfate Double-Oxidation System for the Efficient Degradation of Tetracycline
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Shefeng Li, Yong Zhang, Siyu Ding, Xuli Li, Wei Wang, Ningning Dong, Miaomiao Nie, and Pei Chen
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zinc peroxide ,peroxymonosulfate ,double-oxidation system ,tetracycline degradation ,synergistic activation mechanism ,Organic chemistry ,QD241-441 - Abstract
The increasingly severe antibiotic pollution has become one of the most critical issues. In this study, a zinc peroxide/peroxymonosulfate (ZnO2/PMS) double-oxidation system was developed for tetracycline (TC) degradation. A small amount of ZnO2 (10 mg) and PMS (30 mg) could effectively degrade 82.8% of TC (100 mL, 50 mg/L), and the degradation process could be well described by the pseudo-second-order kinetic model. Meanwhile, the ZnO2/PMS double-oxidation system showed high adaptability in terms of reaction temperature (2–40 °C), initial pH value (4–12), common inorganic anions (Cl−, NO3−, SO42− and HCO3−), natural water source and organic pollutant type. The quenching experiment and electron paramagnetic resonance (EPR) characterization results confirmed that the main reactive oxygen species (ROS) was singlet oxygen (1O2). Moreover, three possible pathways of TC degradation were deduced according to the analyses of intermediates. On the basis of comparative characterization and experiment results, a synergistic activation mechanism was further proposed for the ZnO2/PMS double-oxidation system, accounting for the superior degradation performance. The released OH− and H2O2 from ZnO2 could activate PMS to produce major 1O2 and minor superoxide radicals (•O2−), respectively.
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- 2024
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38. Molecular Identification and Functional Characterization of LC-PUFA Biosynthesis Elongase (elovl2) Gene in Chinese Sturgeon (Acipenser sinensis)
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Haoze Ding, Xuetao Shi, Zhengyong Wen, Xin Zhu, Pei Chen, Yacheng Hu, Kan Xiao, Jing Yang, Tian Tian, Dezhi Zhang, Shuqi Wang, and Yang Li
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elovl2 ,functional characterization ,LC-PUFAs biosynthesis ,Chinese sturgeon (Acipenser sinensis) ,chondrichthyans ,Veterinary medicine ,SF600-1100 ,Zoology ,QL1-991 - Abstract
Elongases of very-long-chain fatty acids (Elovls) are critical rate-limiting enzymes that are involved in LC-PUFA biosynthesis through catalyzing the two-carbon elongation of a pre-existing fatty acyl chain. Thus far, several Elovls have been extensively studied in teleost. However, the functional and physiological roles of Elovls in chondrichthyans have rarely been reported. In this study, we identified and characterized elovl2 from the endangered Chinese sturgeon (Acipenser sinensis) by whole genome scanning. The results show that the coding sequence of elovl2 was 894 bp in length, for a putative protein of 297 amnio acids. Comparative genomic analyses indicated that Chinese sturgeon elovl2 was evolutionarily conserved. Functional characterization in yeast demonstrated that the Chinese sturgeon Elovl2 could efficiently elongate C20 (ARA and EPA) and C22 (22:4n-6 and 22:5n-3) substrates, confirming its critical roles in LC-PUFA biosynthesis. Spatial and temporal expression analyses showed high elovl2 mRNA levels were detected in the liver and brain and showed an increase trend both in embryonic and post-hatching stages. Interestingly, diets with vegetable oils as lipid sources could significantly induce the high expression of elovl2 in Chinese sturgeon, implying that the endogenous LC-PUFA biosynthesis pathway was stimulated by lack of LC-PUFA in their diets. Our findings will enhance our understanding about the evolutionary and functional roles of elovl2 and provide novel insights into the LC-PUFA biosynthesis mechanism in vertebrates.
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- 2024
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39. Commuting Behavior Changes at Different Stages of Localized COVID-19 Outbreak: Evidence from Nanjing, China
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Pei Chen, Tao Wu, Yurui Yin, and Xinwei Ma
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commuting ,mode shift ,sequential analysis ,turbulence ,localized COVID-19 outbreak ,Systems engineering ,TA168 ,Technology (General) ,T1-995 - Abstract
Commuting behaviors have been changed by the COVID-19 pandemic. To investigate the impacts at different stages of sudden and localized COVID-19 outbreak, this paper carries out an online survey to obtain data, targeting the residents in Nanjing China, where there had been COVID-19 outbreaks and proposes a sequential analysis method to calculate the complexity of commuting behavior changes. The Tobit model is used to explore the factors that influence the complexity of commuting behavior changes. Results show that commuters using public transportation drop significantly when sudden outbreaks occur, with 43.5% of them switching to private cars or working from home. The number of residents working from home increases by 14 times. While an outbreak gradually subsides, commuting modes tend to recover, but does not immediately return to the state before the outbreak. Regression model results indicate that commuters aged 40–60 tend to maintain their commuting habits, while younger workers are more flexible on their commuting options. Middle-income commuters, or those living in low-risk areas or near a subway within 800 m prefer to change commuting modes, opting for what they perceive to be safer ways to commute. For commuters living in medium- or high-risk areas and those who are living with people who have non-green health codes, they tend to adjust their commuting modes in real time based on the color change in the health codes and the risk level of the areas they live. The research findings contribute to our understanding of commuting behaviors and targeted management needs during local outbreaks, and can help the government formulate a comprehensive and more effective pandemic prevention policy.
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- 2024
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40. Abnormal expression of fission and fusion genes and the morphology of mitochondria in eutopic and ectopic endometrium
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Chaoshuang Ye, Pei Chen, Bingning Xu, Yang Jin, Yongchao Pan, Tianyu Wu, Yongjiang Du, Jingxia Mao, and Ruijin Wu
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Endometriosis ,Mitochondria ,Fission ,Fusion ,Mitochondrial morphology ,Cristae ,Medicine - Abstract
Abstract Mitochondria play a pivotal role in physiological and metabolic function of the cell. Mitochondrial dynamics orchestrate mitochondrial function and morphology, involving fission and fusion as well as ultrastructural remodeling. Mounting evidence unravels the close link between mitochondria and endometriosis. However, how mitochondrial architecture changes through fission and fusion in eutopic and ectopic tissues of women with ovarian endometriosis remains unknown. We detected the expression of fission and fusion genes and the morphology of mitochondria in eutopic and ectopic endometrium in ovarian endometriosis. The results showed that the expression of DRP1 and LCLAT1 was upregulated in eutopic endometrial stromal cells (ESCs), and the expression of DRP1, OPA1, MFN1, MFN2, and LCLAT1 was significantly downregulated in ectopic ESCs, and reduced number of mitochondria, wider cristae width and narrower cristae junction width was observed, but there was no difference in cell survival rate. The altered mitochondrial dynamics and morphology might, respectively, provide an advantage for migration and adhesion in eutopic ESCs and be the adaptive response in ectopic endometrial cells to survive under hypoxic and oxidative stress environment.
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- 2023
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41. Cognitive Impairment in Chronic Kidney Disease Is Associated with Glymphatic System Dysfunction
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Shuqin Xu, Jiuqi Wang, Kedi Sun, Lin Meng, Chi Qin, Renyi Feng, Yiming Tian, Yanping Zhai, Dongxiao Liang, Rui Zhang, Haiyan Tian, Han Liu, Yongkang Chen, Yu Fu, Pei Chen, Qingyong Zhu, Junfang Teng, and Xuejing Wang
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glymphatic system ,perivascular spaces ,magnetic resonance imaging ,chronic kidney disease ,cognitive impairment ,Internal medicine ,RC31-1245 - Abstract
Introduction: This study was designed to explore the associations between impaired cognition in chronic kidney disease (CKD) patients and the dysfunction of the glymphatic system. Method: Data were obtained from 77 CKD patients and 50 age-matched healthy control individuals from the First Affiliated Hospital of Zhengzhou University. CKD patients were stratified into with and without impaired cognitive function. T2-weighted magnetic resonance imaging results were used to assess area ratios for the perivascular space and ventricles in participants, while the Montreal Cognitive Assessment and the Mini-Mental State Examination were employed to measure cognitive function. Correlations between the perivascular space or ventricle area ratios and cognitive impairment were assessed in CKD patients. Results: Significant increases in the burden of enlarged perivascular spaces in the frontal cortex and basal ganglia were observed in CKD patients with cognitive impairment relative to those without such impairment, with a concomitant increase in analyzed ventricle area ratios. Enlarged perivascular spaces in the frontal cortex, basal ganglia and increased area ratios of lateral ventricles and 4th ventricle exhibited relatively high sensitivity and specificity as means of differing between the CKD patients with and without cognitive impairment. Conclusion: These results indicate that the burden of enlarged perivascular spaces in the frontal cortex and basal ganglia and increases in ventricle area ratio values may offer utility as biomarkers that can aid in detection of even mild cognitive decline in individuals with CKD. The dysfunction of the glymphatic system may play a key role in the pathogenesis of CKD-related cognitive impairment.
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- 2023
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42. Predicting post-operative vault and optimal implantable collamer lens size using machine learning based on various ophthalmic device combinations
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Xi Chen, Yiming Ye, Huan Yao, Chang Liu, Anqi He, Xiangtao Hou, Keming Zhao, Zedu Cui, Yan Li, Jin Qiu, Pei Chen, Ying Yang, Jing Zhuang, and Keming Yu
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Implantable collamer lens ,Machine learning ,Multi-device data ,Vault prediction ,Size selection ,Medical technology ,R855-855.5 - Abstract
Abstract Background Implantable Collamer Lens (ICL) surgery has been proven to be a safe, effective, and predictable method for correcting myopia and myopic astigmatism. However, predicting the vault and ideal ICL size remains technically challenging. Despite the growing use of artificial intelligence (AI) in ophthalmology, no AI studies have provided available choices of different instruments and combinations for further vault and size predictions. This study aimed to fill this gap and predict post-operative vault and appropriate ICL size utilizing the comparison of numerous AI algorithms, stacking ensemble learning, and data from various ophthalmic devices and combinations. Results This retrospective and cross-sectional study included 1941 eyes of 1941 patients from Zhongshan Ophthalmic Center. For both vault prediction and ICL size selection, the combination containing Pentacam, Sirius, and UBM demonstrated the best results in test sets [R 2 = 0.499 (95% CI 0.470–0.528), mean absolute error = 130.655 (95% CI 128.949–132.111), accuracy = 0.895 (95% CI 0.883–0.907), AUC = 0.928 (95% CI 0.916–0.941)]. Sulcus-to-sulcus (STS), a parameter from UBM, ranked among the top five significant contributors to both post-operative vault and optimal ICL size prediction, consistently outperforming white-to-white (WTW). Moreover, dual-device combinations or single-device parameters could also effectively predict vault and ideal ICL size, and excellent ICL selection prediction was achievable using only UBM parameters. Conclusions Strategies based on multiple machine learning algorithms for different ophthalmic devices and combinations are applicable for vault predicting and ICL sizing, potentially improving the safety of the ICL implantation. Moreover, our findings emphasize the crucial role of UBM in the perioperative period of ICL surgery, as it provides key STS measurements that outperformed WTW measurements in predicting post-operative vault and optimal ICL size, highlighting its potential to enhance ICL implantation safety and accuracy.
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- 2023
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43. Gut-immunity-joint axis: a new therapeutic target for gouty arthritis
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Pei Chen, Zhiqiang Luo, Chengyin Lu, Gonghui Jian, Xinyu Qi, and Hui Xiong
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gouty arthritis ,gut microbes ,immune response ,macrophage ,inflammation ,pain mechanism ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Gouty arthritis (GA) is an inflammatory disease characterized by pain. The primary goal of current treatment strategies during GA flares remains the reduction of inflammation and pain. Research suggests that the gut microbiota and microbial metabolites contribute to the modulation of the inflammatory mechanism associated with GA, particularly through their effect on macrophage polarization. The increasing understanding of the gut-joint axis emphasizes the importance of this interaction. The primary objective of this review is to summarize existing research on the gut-immune-joint axis in GA, aiming to enhance understanding of the intricate processes and pathogenic pathways associated with pain and inflammation in GA, as documented in the published literature. The refined comprehension of the gut-joint axis may potentially contribute to the future development of analgesic drugs targeting gut microbes for GA.
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- 2024
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44. Distinct characteristics and prognosis of IgA nephropathy patients with nephrotic syndrome: a propensity score-matched cohort study
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Yuanyuan Jiang, Pei Chen, Wenjing Zhao, Lijun Liu, Sufang Shi, Jicheng Lv, and Hong Zhang
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IgA nephropathy ,nephrotic syndrome ,proteinuria ,hypoalbuminemia ,complement ,Medicine (General) ,R5-920 - Abstract
IntroductionIgA nephropathy (IgAN) is the most prevalent primary glomerulonephritis globally. While nephrotic syndrome (NS) is uncommon in IgAN, its significance remains unclear.MethodsWe conducted a retrospective analysis of 170 IgAN patients, classifying them into NS (n = 85) and non-NS (n = 85) groups. Our study aims to compare their clinical characteristics, treatment responses, and prognoses. Patients were selected based on renal biopsy from 2003 to 2020. Propensity score matching ensured comparability. Clinical, pathological, and immunological data were analyzed. Composite endpoints were defined as end-stage kidney disease (ESKD) or a 30% decline in estimated glomerular filtration rate (eGFR).ResultsNS patients showed higher eGFR (74.3 ± 36.8 vs. 61.5 ± 33.6 mL/min.1.73 m2, p = 0.02), severe hematuria (35.0 (4.7,147.5) vs. 4.0 (1.8,45,0) cells/μl, p
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- 2024
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45. Uncovering the Pre-Deterioration State during Disease Progression Based on Sample-Specific Causality Network Entropy (SCNE)
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Jiayuan Zhong, Hui Tang, Ziyi Huang, Hua Chai, Fei Ling, Pei Chen, and Rui Liu
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Science - Abstract
Complex diseases do not always follow gradual progressions. Instead, they may experience sudden shifts known as critical states or tipping points, where a marked qualitative change occurs. Detecting such a pivotal transition or pre-deterioration state holds paramount importance due to its association with severe disease deterioration. Nevertheless, the task of pinpointing the pre-deterioration state for complex diseases remains an obstacle, especially in scenarios involving high-dimensional data with limited samples, where conventional statistical methods frequently prove inadequate. In this study, we introduce an innovative quantitative approach termed sample-specific causality network entropy (SCNE), which infers a sample-specific causality network for each individual and effectively quantifies the dynamic alterations in causal relations among molecules, thereby capturing critical points or pre-deterioration states of complex diseases. We substantiated the accuracy and efficacy of our approach via numerical simulations and by examining various real-world datasets, including single-cell data of epithelial cell deterioration (EPCD) in colorectal cancer, influenza infection data, and three different tumor cases from The Cancer Genome Atlas (TCGA) repositories. Compared to other existing six single-sample methods, our proposed approach exhibits superior performance in identifying critical signals or pre-deterioration states. Additionally, the efficacy of computational findings is underscored by analyzing the functionality of signaling biomarkers.
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- 2024
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46. Improved metabolomic approach for evaluation of phytochemicals in mustard, kale, and broccoli microgreens under different controlled environment agriculture conditions
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Yanfang Li, Bin Zhou, Zi Teng, Mengliang Zhang, Liangli Yu, Yaguang Luo, Pei Chen, and Jianghao Sun
- Subjects
Metabolomics ,Microgreen ,Controlled environment agriculture (CEA) ,Image-based normalization ,Chemometrics ,Agriculture (General) ,S1-972 ,Nutrition. Foods and food supply ,TX341-641 - Abstract
The fast-growing field of controlled environment agriculture (CEA) offers unprecedented opportunities for targeted improvement in concentrations of bioactive compounds in fresh produce achieved through precise modulation of production conditions. To gain full sight of the phytochemical profiles of vegetables grown under different conditions, a rapid analytical strategy is needed for the evaluation of different CEA growing conditions. In this study, Brassica microgreens including ruby streaks mustard (B. juncea), red kale (B. oleracea), and broccoli (B. oleracea) were used as model plants for the evaluation of CEA conditions. Analysis of two first leaves (cotyledons) in microgreens with minimum sample extraction and ultra-high performance liquid chromatography-high-resolution mass spectrometry (UHPLC-HRMS) based metabolomic approach was applied for phytochemical analysis for evaluation of the brassica microgreens grown under four different light sources, namely white (W), dark (D), white and far-red (WF) and far-red (F) and fertilizer conditions (CaCl2 and K2SO4). An image-based normalization method using leaf area coupled with chemometrics-based strategies including principal component analysis (PCA) and partial least squares-discriminant analysis (PLS-DA) was performed for the post-acquisition data analysis. The method successfully distinguished between Brassica microgreens grown under different CEA settings in a shortened cycle with less organic solvent and labor, which is more environmentally friendly and sustainable. Marker compounds that are responsible for differentiating the Brassica microgreens under various CEA conditions were tentatively identified. Among the tentatively identified marker compounds, gingerglycolipid A was first reported in red kale and broccoli. The results from the present study may serve as a scientific foundation for the rapid and simple assessment to optimize CEA conditions.
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- 2023
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47. Changes in the epidemiological characteristics of prehospital emergency services before and during the COVID-19 pandemic, Chengdu, 2016–2021
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Bihua Zhang, Wenchao Kang, Shiqiang Xiong, Xia Huang, Pei Chen, Jinmin Huang, Yufei Hou, Lin Ma, and Tao Xiang
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Medicine ,Science - Abstract
Abstract The coronavirus disease 2019 (COVID-19) brought a healthy crisis all around the world. It’s not only affected healthcare utilization, but also some disease’s incidence. We collected pre-hospital emergency data in Chengdu from January 2016 to December 2021, and studied the demand for emergency medical services (EMSs), emergency response times (ERTs), and the disease spectrum in the city proper of Chengdu as a whole. A total of 1,122,294 prehospital emergency medical service (EMS) instances met the inclusion criteria. Under the influence of COVID-19, notably in 2020, the epidemiological characteristics of prehospital emergency services in Chengdu were considerably altered. However, as the pandemic was brought under control, they returned to normal or even earlier in 2021.The COVID-19 pandemic had an effect on people's medical care-seeking behavior and the performance of prehospital emergency services. Although the indicators associated with prehospital emergency services eventually recovered as the epidemic was brought under control, they remained marginally different from before the outbreak.
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- 2023
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48. Identification of miR-671-5p and Its Related Pathways as General Mechanisms of Both Form-Deprivation and Lens-Induced Myopia in Mice
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Zedu Cui, Yuke Huang, Xi Chen, Taiwei Chen, Xiangtao Hou, Na Yu, Yan Li, Jin Qiu, Pei Chen, Keming Yu, and Jing Zhuang
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miRNA ,form-deprivation myopia ,lens-induced myopia ,animal models ,Biology (General) ,QH301-705.5 - Abstract
Animal models have been indispensable in shaping the understanding of myopia mechanisms, with form-deprivation myopia (FDM) and lens-induced myopia (LIM) being the most utilized. Similar pathological outcomes suggest that these two models are under the control of shared mechanisms. miRNAs play an important role in pathological development. Herein, based on two miRNA datasets (GSE131831 and GSE84220), we aimed to reveal the general miRNA changes involved in myopia development. After a comparison of the differentially expressed miRNAs, miR-671-5p was identified as the common downregulated miRNA in the retina. miR-671-5p is highly conserved and related to 40.78% of the target genes of all downregulated miRNAs. Moreover, 584 target genes of miR-671-5p are related to myopia, from which we further identified 8 hub genes. Pathway analysis showed that these hub genes are enriched in visual learning and extra-nuclear estrogen signaling. Furthermore, two of the hub genes are also targeted by atropine, which strongly supports a key role of miR-671-5p in myopic development. Finally, Tead1 was identified as a possible upstream regulator of miR-671-5p in myopia development. Overall, our study identified the general regulatory role of miR-671-5p in myopia as well as its upstream and downstream mechanisms and provided novel treatment targets, which might inspire future studies.
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- 2023
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49. Chemical Composition of Turmeric (Curcuma longa L.) Ethanol Extract and Its Antimicrobial Activities and Free Radical Scavenging Capacities
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Huan Wu, Zhihao Liu, Yaqiong Zhang, Boyan Gao, Yanfang Li, Xiaohua He, Jianghao Sun, Uyory Choe, Pei Chen, Ryan A. Blaustein, and Liangli Yu
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turmeric ,UHPLC-MS/MS ,antimicrobial activity ,antioxidant ,curcumin ,demethoxycurcumin ,Chemical technology ,TP1-1185 - Abstract
Turmeric (Curcuma longa L.) is a perennial tuberous plant from the genus Curcuma (Zingiberaceae) and has been widely used in foods for thousands of years. The present study examined the ethanol extract of turmeric for its chemical composition, antimicrobial activity, and free radical scavenging properties. UHPLC-MS/MS analysis tentatively identified eight compounds in the turmeric extract. Potential antimicrobial effects of 0.1, 1.0, and 10 mg turmeric equivalents (TE)/mL were evaluated in vitro against a variety of Gram-negative bacteria (i.e., Escherichia coli, Klebsiella pneumoniae, and Pseudomonas sp.) and Gram-positive bacteria (i.e., Enterococcus faecalis, Listeria innocua, and Staphylococcus aureus). Concentrations of 0.1 and 1.0 mg TE/mL inhibited the growth of S. aureus and significantly suppressed that of Pseudomonas sp., E. faecalis, and L. innocua. The growth of all strains, including E. coli, was inhibited by 10 mg TE/mL. Moreover, free radical scavenging capacities were determined using HO●, ABTS●+, and DPPH● (HOSC, ABTS, and RDSC, respectively) radicals. The turmeric ethanol extract had a TPC value of 27.12 mg GAE/g, together with HOSC, RDSC, and ABTS values of 1524.59, 56.38, and 1.70 μmol TE/g, respectively. Our results suggest that turmeric extract has potential applications for use in functional foods to reduce microbial burdens and oxidative stress-related health problems.
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- 2024
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50. The Effects of Tillage and the Combined Application of Organic and Inorganic Fertilizers on the Antioxidant Enzyme Activity and Yield of Maize Leaves
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Guangming Xie, Min Liang, Pei Chen, Chang Zhang, Mingyuan Fan, Chuangyun Wang, and Li Zhao
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farming practices ,fertilizer application ,yield ,antioxidant enzymes ,Agriculture - Abstract
The aim of this study was to explore the characteristics of the combined application of organic fertilizer and inorganic fertilizer using different tillage methods to delay the senescence of maize leaves. The yield and activities of GDH, CAT, APX, GR, and GSH enzymes in maize leaves were measured at different growth stages by using two tillage methods, three organic and inorganic combined applications (P1, P2, and P3), and four control treatments. (1) During the growth period, the R + S and R treatments were P1 treatments, with the highest enzyme activities noted for GDH, CAT, APX, GR, and GSH, which were 36.79–103.22% higher than those of CK. (2) The average yield of all R + S treatments was higher than that of R treatments, and the average yield of P1 treatment was the highest under R + S, which was 13,663.79 kg hm−2, which was 6.39%, 7.90%, and 14.67% higher than that of P2, P3, and CK, respectively, which was lower than that of R. The yield of P1 treatment was 2.53% higher. (3) There was a significant positive correlation between APX activity, CAT activity, GR activity, GDH activity, GSH activity, grain number per ear, ear length, and 100-grain weight of maize leaves at the grain filling stage, and a significant negative correlation between bald tip length and yield. The treatment details had the strongest enzyme activity and the highest yield when using the rotary tillage + subsoiling (R + S) P1 method, which was the most suitable tillage method and the best fertilizer ratio combination, which could be demonstrated and popularized in a large area in the dry farming area of spring maize in Shanxi Province.
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- 2024
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