759 results on '"Nan G"'
Search Results
52. Area coverage path planning of multiple ASVs based on ECDIS
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Ming MA, Nan GU, Jiawei DONG, Yong YIN, Bing HAN, and Zhouhua PENG
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swarming autonomous surface vehicles ,area coverage path planning ,spanning tree coverage planning ,ecdis ,Naval architecture. Shipbuilding. Marine engineering ,VM1-989 - Abstract
ObjectiveAiming at the area coverage problem of multiple autonomous surface vehicles (ASVs), this paper investigates a coverage path planning (CPP) strategy based on an electronic chart display and information system (ECDIS). MethodFirst, according to the information of sea, land and water depth from ECDIS, an environmental model for the area coverage of ASVs is established based on the grid method. Second, an area division method based on the roulette wheel selection method is proposed to solve the problem of irregular area division in divided areas based on the robots' initial position method, and achieve the reasonable area division of ASVs in the grid map. Finally, a template-based area coverage path planning method is proposed to solve the problem of generating too many turns in paths generated by the spanning tree coverage agorithm.ResultsA human-machine interactive simulation platform for ASVs based on ECDIS is established to verify the effectiveness of the proposed area coverage path planning method based on the roulette wheel method and template method in optimizing the number of turns in the planning path. ConclusionThe proposed area coverage path planning method for ASVs based on ECDIS can be used to achieve coverage path planning in target mission areas at sea.
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- 2024
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53. A high altitude respiration and SpO2 dataset for assessing the human response to hypoxia
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Xi Zhang, Yu Zhang, Yingjun Si, Nan Gao, Honghao Zhang, and Hui Yang
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Science - Abstract
Abstract This report presents the Harespod dataset, an open dataset for high altitude hypoxia research, which includes respiration and SpO2 data. The dataset was collected from 15 college students aged 23–31 in a hypobaric oxygen chamber, during simulated altitude changes and induced hypoxia. Real-time physiological data, such as oxygen saturation waveforms, oxygen saturation, respiratory waveforms, heart rate, and pulse rate, were obtained at 100 Hz. Approximately 12 hours of valid data were collected from all participants. Researchers can easily identify the altitude corresponding to physiological signals based on their inherent patterns. Time markers were also recorded during altitude changes to facilitate realistic annotation of physiological signals and analysis of time-difference-of-arrival between various physiological signals for the same altitude change event. In high altitude scenarios, this dataset can be used to enhance the detection of human hypoxia states, predict respiratory waveforms, and develop related hardware devices. It will serve as a valuable and standardized resource for researchers in the field of high altitude hypoxia research, enabling comprehensive analysis and comparison.
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- 2024
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54. Droplet impact on doubly re-entrant structures
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Navdeep Sangeet Singh, Thanaphun Jitniyom, Miguel Navarro-Cía, and Nan Gao
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Medicine ,Science - Abstract
Abstract Doubly re-entrant pillars have been demonstrated to possess superior static and dynamic liquid repellency against highly wettable liquids compared to straight or re-entrant pillars. Nevertheless, there has been little insight into how the key structural parameters of doubly re-entrant pillars influence the hydrodynamics of impacting droplets. In this work, we carried out numerical simulations and experimental studies to portray the fundamental physical phenomena that can explain the alteration of the surface wettability from adjusting the design parameters of the doubly re-entrant pillars. On the one hand, three-dimensional multiphase flow simulations of droplet impact were conducted to probe the predominance of the overhang structure in dynamic liquid repellency. On the other hand, the numerical results of droplet impact behaviours are agreed by the experimental results for different pitch sizes and contact angles. Furthermore, the dimensions of the doubly re-entrant pillars, including the height, diameter, overhang length and overhang thickness, were altered to establish their effect on droplet repellency. These findings present the opportunity for manipulations of droplet behaviours by means of improving the critical dimensional parameters of doubly re-entrant structures.
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- 2024
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55. The complete mitochondrial genome of Sarcophaga angarosinica (Diptera: Sarcophagidae)
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Ziqi Zhou, Zhiyun Pi, Yuanxing Wang, Shaojiang Guo, Nan Guo, Junbo Yang, Xiangyan Zhang, Changquan Zhang, and Jifeng Cai
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Mitogenome ,sarcophaga angarosinica ,sarcophagidae ,Genetics ,QH426-470 - Abstract
AbstractSarcophaga (Liosarcophaga) angarosinica (Rohdendorf, 1937) (Diptera: Sarcophagidae) is a species of both medical and ecological significance. In this study, the complete mitochondrial genome (mitogenome) of S. angarosinica was sequenced and characterized. The mitogenome has a total length of 15,215 bp, including 13 protein-coding genes, two ribosomal RNAs, 22 transfer RNAs, and an adenine and thymine-rich region. This mitogenome comprises 39.5% adenine, 9.4% guanine, 14.4% cytosine, and 36.8% thymine. Phylogenetic analysis revealed that S. angarosinica is closely related to Sarcophaga similis. This study enriches the genetic data on S. angarosinica and will contribute to establishing the phylogenetic relationships among flesh flies.
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- 2024
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56. Nonlinear Dynamic Observer Design for Uncertain Vehicle Systems With Disturbances
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Nan Gao, Jianliang Tang, Jinghui Lin, Guifen Sheng, and Hao Chen
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Dynamic observer ,nonlinear system ,uncertainty ,LMI ,H-infinity ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
This paper investigates the dynamic observer (DO) design problem for a class of disturbed Lipschitz nonlinear vehicle systems with uncertainties, where the uncertainties are assumed to be in both system matrix and input matrix. The proposed DO has a unified form and the popularly used proportional observer and proportional integral observer can be considered as the particular cases of the proposed DO. Based on the algebraic constraints, the observer design issue is transformed into the asymptotically stability analysis problem. The sufficient criterion of the DO design is derived in terms of linear matrix equality (LMI), by constructing a Lyapunov function to guarantee the H-infinity performance. A numerical example is used to illustrate the performance of the proposed DO.
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- 2024
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57. A decade of love: mapping the landscape of romantic love research through bibliometric analysis
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Yixue Han, Yulin Luo, Zhuohong Chen, Nan Gao, Yangyang Song, and Shen Liu
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History of scholarship and learning. The humanities ,AZ20-999 ,Social Sciences - Abstract
Abstract Given the limited availability of bibliometric and visual analysis on the topic of romantic love, the primary objective of the current study is to fill this gap by conducting a comprehensive visual analysis of relevant literature. Through this analysis, the current study aimed to uncover current research trends and identify potential future directions in the field of romantic love. The current study’s search criteria were met by an impressive 6858 publications found in the Web of Science database for the period between 2013 and 2022. A thorough analysis was conducted on the bibliographic visualization of the authors, organizations, countries, references, and keywords. Over time, there has been a remarkable surge in the number of significant publications. Among the authors in the field of romantic love, Emily A. Impett has emerged as the most prolific. The Journal of Social and Personal Relationships is indeed one of the top journals that has published a significant number of articles on the topic of romantic love. During the preceding decade, the University of California System emerged as a prominent producer of publications centered around romantic love, solidifying the United States’ position as a dominant player in this field. In recent times, there has been a significant surge in the popularity of keywords such as “same-sex,” “conflict resolution,” and “social relationships” within academic literature. These topics have experienced a burst of attention, as evidenced by a substantial increase in references and citations. Through the use of visualization maps and analysis of key publications, the current study offers a comprehensive overview of the key concepts and potential avenues for future research in the field of romantic love. Gaining a deep understanding of the complex dynamics and societal implications of romantic love has been instrumental in formulating policies that embody increased compassion and support. As a result, these policies have played a pivotal role in fostering resilient familial ties and contributing to the enduring stability and prosperity of our social fabric.
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- 2024
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58. Adult stem cell activity in naked mole rats for long-term tissue maintenance
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Shamir Montazid, Sheila Bandyopadhyay, Daniel W. Hart, Nan Gao, Brian Johnson, Sri G. Thrumurthy, Dustin J. Penn, Bettina Wernisch, Mukesh Bansal, Philipp M. Altrock, Fabian Rost, Patrycja Gazinska, Piotr Ziolkowski, Bu’Hussain Hayee, Yue Liu, Jiangmeng Han, Annamaria Tessitore, Jana Koth, Walter F. Bodmer, James E. East, Nigel C. Bennett, Ian Tomlinson, and Shazia Irshad
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Science - Abstract
Abstract The naked mole rat (NMR), Heterocephalus glaber, the longest-living rodent, provides a unique opportunity to explore how evolution has shaped adult stem cell (ASC) activity and tissue function with increasing lifespan. Using cumulative BrdU labelling and a quantitative imaging approach to track intestinal ASCs (Lgr5 + ) in their native in vivo state, we find an expanded pool of Lgr5 + cells in NMRs, and these cells specifically at the crypt base (Lgr5 +CBC ) exhibit slower division rates compared to those in short-lived mice but have a similar turnover as human LGR5 +CBC cells. Instead of entering quiescence (G0), NMR Lgr5 +CBC cells reduce their division rates by prolonging arrest in the G1 and/or G2 phases of the cell cycle. Moreover, we also observe a higher proportion of differentiated cells in NMRs that confer enhanced protection and function to the intestinal mucosa which is able to detect any chemical imbalance in the luminal environment efficiently, triggering a robust pro-apoptotic, anti-proliferative response within the stem/progenitor cell zone.
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- 2023
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59. Numerical study of effect of post injection coupled with EGR on combustion and emission performances of CRDI engine fueled with biodiesel-ethanol blends
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Limin Geng, Hongliang Xiao, Yuxuan Cui, Nan Gao, Qi Li, Hao Chen, and Yuantao Xie
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Post injection ,Exhaust gas recirculation ,Combustion characteristics ,Exhaust emissions ,Biodiesel-ethanol blends ,Transportation engineering ,TA1001-1280 - Abstract
Energy shortage and environmental pollution are becoming more serious, biodiesel is regarded as the most promising alternative fuel for diesel engines due to its environmentally friendly and renewable characteristics. In this study, the biodiesel-ethanol blends were used in a diesel engine, and the purpose of the study was to simultaneously control the NOx and soot emissions of the diesel engine by adjusting the injection strategy and EGR rate. A turbocharged, six-cylinder, common rail direct injection (CRDI) engine model was established using GT-Power. The effects of the main-post injection strategy and post injection coupled with exhaust gas recirculation (EGR) on combustion and emission characteristics were investigated at a maximum torque speed and a medium load. The results show that when the main-post injection strategy is employed, the combustion duration of the main injection is shortened with an increase in the main-post injection interval (MPI). When the MPI increased to more than 18 °CA, the heat release of post injection could be observed clearly from the curve of the heat release rate, NOx emissions decreased by 5.70% and 7.12%, respectively, and soot emissions decreased by 25.56% and 30.20%, respectively. Moreover, with the increasing post injection quantity, the combustion duration of the main injection shortened, and the peak heat release rate (PHRR) of the post injection increased. When the fuel quantity for the post injection increased from 2 to 6 mg, NOx emissions decreased from 2.33% to 9.80%, and soot emissions decreased from 16.10% to 34.97%. The effect of post injection quantity on emissions was more significant than that of the MPI. In addition, with increasing EGR rate, the ignition delay is prolonged, the peak cylinder pressure, PHRR, peak combustion temperature and NOx emissions decrease, whereas soot emissions increase gradually. Main-post injection can improve the NOx-soot trade-off, the optimal EGR rate is 22.86% under a post injection quantity of 4 mg and a MPI of 22 °CA.
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- 2023
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60. Associations between serum electrolyte and short-term outcomes in patients with acute decompensated heart failure
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Kai Zhao, Qun Zheng, Jiang Zhou, Qi Zhang, Xiaoli Gao, Yinghua Liu, Senlin Li, Weichao Shan, Li Liu, Nan Guo, Hongsen Tian, Qingmin Wei, Xitian Hu, Yingkai Cui, Xue Geng, Qian Wang, and Wei Cui
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Serum potassium ,serum sodium ,serum chloride ,serum total calcium ,short-term prognosis ,acute decompensated heart failure ,Medicine - Abstract
AbstractIntroduction There is a dearth of comprehensive studies on the association between serum electrolyte and adverse short-term prognosis of Chinese patients with acute decompensated heart failure (ADHF).Patients and methods A total of 5166 patients with ADHF were divided into four serum electrolyte-related study populations (potassium (n = 5145), sodium (n = 5135), chloride (n = 4966), serum total calcium (STC) (n = 4143)) under corresponding exclusions. Different logistic regression models were utilized to gauge the association between these electrolytes or the number of electrolyte abnormalities and the risk of a composite of all-cause mortality or 30-day heart failure (HF) readmission.Results In multivariable adjusted analysis, patients with potassium below 3.5 mmol/L (odds ratios (ORs) 1.45; 95% confidence interval (CI):1.07–1.95), 4.01–4.50 mmol/L (OR: 1.29, CI: 1.02–1.62), 4.51–5.00 mmol/L (OR: 1.43, CI: 1.08–1.90) and above 5.00 mmol/L (OR: 1.74, CI: 1.21–2.51) had an increased risk of outcome when compared with potassium at 3.50–4.00 mmol/L. Sodium levels were inversely related to the risk of a composite outcome (
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- 2023
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61. Utilization of SYNTAX Score II for Predictive Clinical Outcomes in Patients with Coronary Artery Disease and Chronic Renal Insufficiency Following Percutaneous Coronary Intervention
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Liqiu Yan, Dong Han, Yabin Wang, Sulei Li, Wei Yan, Nan Guo, Ying Mao, Qian Yang, Mengyao Li, Yumeng Lei, Shuaiyong Zhang, and Feng Cao
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percutaneous coronary intervention ,coronary artery disease ,syntax score ,syntax score ii ,chronic renal insufficiency ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background: The SYNTAX score II (SS II) has earned widespread recognition for use on individuals with coronary artery disease (CAD) due to its reliable predictions of 4-year all-cause mortality (ACM). This research focuses on substantiating the prognostic significance of using the SS II for patients experiencing concurrent chronic renal insufficiency (CRI) and CAD who have undergone percutaneous coronary intervention (PCI). Methods: This study retrospectively examined 2468 patients with concurrent CAD and CRI who underwent PCI. Based on their SS II, these participants were sorted into low-, medium-, and high-risk groups and monitored over a median of three years. The evaluation of the predictive precision of different SYNTAX scores for clinical outcomes in patients with CRI after PCI involved using time-dependent receiver operating characteristic (ROC) curves. These included the standard SS (SS), SS II, clinical SS (CSS), and residual SS (rSS). The primary outcomes were ACM and cardiac mortality (CM), while the secondary outcomes covered major adverse cardiovascular and cerebrovascular events (MACCEs), stroke, unplanned revascularization, and myocardial infarction (MI). Results: Higher 5-year cumulative incidences of MACCEs, MI, CM, and ACM were observed significantly in patients in the high SS II category relative to those in the low and medium SS II categories. Multivariable Cox regression analysis confirmed that the SS II independently predicts ACM, CM, MI, and MACCEs as a prognostic marker. Additionally, the analysis of the time-dependent ROC curve demonstrated that the areas under the curve (AUC) for predicting CM and ACM were 0.772 and 0.767, respectively, which are superior to those of other SYNTAX scores (p < 0.05). Conclusions: As an independent predictor, the SS II is notable for its ability to forecast long-term adverse outcomes, including MACCEs, CM, ACM, and MI. For patients with coexisting CAD and CRI undergoing PCI, it provides significantly improved prognostic accuracy for 5-year ACM and CM compared to other SYNTAX scores.
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- 2024
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62. Spatial and Seasonal Variation and the Driving Mechanism of the Thermal Effects of Urban Park Green Spaces in Zhengzhou, China
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Yuan Feng, Kaihua Zhang, Ang Li, Yangyang Zhang, Kun Wang, Nan Guo, Ho Yi Wan, Xiaoyang Tan, Nalin Dong, Xin Xu, Ruizhen He, Bing Wang, Long Fan, Shidong Ge, and Peihao Song
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landscape metrics (LMs) ,land surface temperature (LST) ,urban ecology ,urban parkland ,vegetation characteristic index (VCI) ,urban heat island (UHI) ,Agriculture - Abstract
Greenscaping, a key sustainable practice, helps cities combat rising temperatures and climate change. Urban parks, a pivotal greenscaping element, mitigate the urban heat island (UHI) effect. In this study, we utilized high-resolution remote sensing imagery (GF-2 and Landsat 8, 9) and in situ measurements to analyze the seasonal thermal regulation of different park types in Zhengzhou, China. We calculated vegetation characteristic indices (VCIs) and landscape patterns (LMs) and employed boosted regression tree models to explore their relative contributions to land surface temperature (LST) across different seasons. Our findings revealed that urban parks lowered temperatures by 0.65 °C, 1.41 °C, and 2.84 °C in spring, summer, and autumn, respectively, but raised them by 1.92 °C in winter. Amusement parks, comprehensive parks, large parks, and water-themed parks had significantly lower LSTs. The VCI significantly influenced LST in autumn, with trees having a stronger cooling effect than shrubs. LMs showed a more prominent effect than VCIs on LST during spring, summer, and winter. Parks with longer perimeters, larger and more dispersed green patches, higher plant species richness, higher vegetation heights, and larger canopies were associated with more efficient thermal reduction in an urban setting. The novelty of this study lies in its detailed analysis of the seasonal thermal regulation effects of different types of urban parks, providing new insights for more effective urban greenspace planning and management. Our findings assist urban managers in mitigating the urban surface heat effect through more effective urban greenspace planning, vegetation community design, and maintenance, thereby enhancing cities’ potential resilience to climate change.
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- 2024
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63. The Influence of the Morphological Characteristics of Mining-Induced Ground Fissures on the Spatiotemporal Distribution of Soil Moisture
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Ziheng Song, Jian Zhang, Mingbo Chi, Nan Guo, Shang Yang, Yangnan Guo, Ruimin He, and Ze Gao
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coal mining-induced ground fissure ,fissure morphology ,HYDRUS ,soil moisture content ,Hydraulic engineering ,TC1-978 ,Water supply for domestic and industrial purposes ,TD201-500 - Abstract
In order to study the influence of fissure morphology on soil moisture-content changes under different fissure types, this study established HYDRUS 2.0 numerical models of stepped fissures and planar fissures with different fissure widths and depths based on the experimental condition parameters obtained from physical simulation tests. Then, we simulated the spatial and temporal variation rules of soil moisture around the fissures. The results showed a high level of agreement between the HYDRUS numerical simulations and actual measurements, indicating that the model accurately reflects the movement of soil moisture near fissures. The study found that ground fissures affected the spatial distribution of soil moisture, leading to an increased rate of moisture loss in the deep soil near the fissure walls. Moreover, larger fissures had greater horizontal and vertical effects on soil moisture. The soil moisture content is lower closer to the fissure walls. As the soil depth increased, the influence of the fissures gradually diminished. For planar fissure with a depth of 50 cm, the soil moisture content was 30.6%, 17.8%, and 8.4% lower at depths of 10, 30, and 50 cm, respectively, compared to a fissure with a depth of 10 cm. For a stepped fissure with a depth of 50 cm, the soil moisture content was 29.2%, 20.9%, and 13.9% lower at depths of 10, 30, and 50 cm, respectively, compared to a fissure with a depth of 10 cm. Under the same conditions of fissure width and depth, stepped fissures exhibit faster moisture loss, and the larger the fissure, the more significant the additional moisture loss compared to planar fissures.
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- 2024
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64. Inoculation with Stutzerimonas stutzeri strains decreases N₂O emissions from vegetable soil by altering microbial community composition and diversity
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Nan Gao, Huanhuan Zhang, Chun Hu, Qing Li, Linmei Li, Peng Lei, Hong Xu, and Weishou Shen
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microbial community composition ,nitrogen-cycle functional genes ,nitrous oxide ,plant growth-promoting rhizobacteria (PGPR) ,soil texture ,Microbiology ,QR1-502 - Abstract
ABSTRACTInoculation with plant growth-promoting rhizobacteria (PGPR) strains has promoted plant growth and decreased nitrous oxide (N₂O) emissions from agricultural soils simultaneously. However, limited PGPR strains can mitigate N₂O emissions from agricultural soils, and the microbial ecological mechanisms underlying N₂O mitigation after inoculation are poorly understood. In greenhouse pot experiments, the effects of inoculation with Stutzerimonas stutzeri NRCB010 and NRCB025 on tomato growth and N₂O emissions were investigated in two vegetable agricultural soils with contrasting textures. Inoculation with NRCB010 and NRCB025 significantly promoted tomato growth in both soils. Moreover, inoculation with NRCB010 decreased the N₂O emissions from the fine- and coarse-textured soils by 38.7% and 52.2%, respectively, and inoculation with NRCB025 decreased the N₂O emissions from the coarse-textured soil by 76.6%. Inoculation with NRCB010 and NRCB025 decreased N₂O emissions mainly by altering soil microbial community composition and the abundance of nitrogen-cycle functional genes. The N₂O-mitigating effect might be partially explained by a decrease in the (amoA + amoB)/(nosZI + nosZII) and (nirS + nirK)/(nosZI + nosZII) ratios, respectively. Soil pH and organic matter were key variables that explain the variation in abundance of N-cycle functional genes and subsequent N₂O emission. Moreover, the N₂O-mitigating effect varied depending on soil textures and individual strain after inoculation. This study provides insights into developing biofertilizers with plant growth-promoting and N₂O-mitigating effects.IMPORTANCEPlant growth-promoting rhizobacteria (PGPR) have been applied to mitigate nitrous oxide (N₂O) emissions from agricultural soils, but the microbial ecological mechanisms underlying N₂O mitigation are poorly understood. That is why only limited PGPR strains can mitigate N₂O emissions from agricultural soils. Therefore, it is of substantial significance to reveal soil ecological mechanisms of PGPR strains to achieve efficient and reliable N₂O-mitigating effect after inoculation. Inoculation with Stutzerimonas stutzeri strains decreased N₂O emissions from two soils with contrasting textures probably by altering soil microbial community composition and gene abundance involved in nitrification and denitrification. Our findings provide detailed insight into soil ecological mechanisms of PGPR strains to mitigate N₂O emissions from vegetable agricultural soils.
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- 2024
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65. Multi-axis CNC finishing and surface roughness prediction of TC11 titanium alloy open integral micro impeller
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HaiYue Zhao, Yan Cao, JunDe Guo, Biao Sun, and Nan Geng
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Mechanical engineering and machinery ,TJ1-1570 - Abstract
The titanium alloy open integral micro impeller has a strong material strength and high removal rate in the field of multi-axis CNC machining. The flow channel is tiny and the blades are thin and highly twisted. It is difficult to control the surface accuracy and prone to overcutting and undercutting. The NX2212 software post-processing module plans two distinct blade finishing process routes and verifies them using virtual machine tool simulation, taking into account the technical challenges of micro impeller machining. Following verification, the tool path machining code is imported into MATLAB for data fitting. The workpiece surface working condition is determined based on the simulation findings, the blade surface roughness value is calculated, and a physical simulation model of blade finishing is created in the finite element analysis software. The outcomes demonstrate how well the “segmented and sub-regional cutting” processing method may raise blade accuracy. The leading and trailing edges of the blade both had surface roughness increases of 4.86% and 4.19%. The surface morphology of the micro impeller is measured using a white light interferometer, and it is CNC machined using two distinct process methods. The findings demonstrate that there is a significant difference between the value calculated by the finite element analysis software and the surface roughness value measured experimentally which together make up less than 5%. An investigation of the impact of cutting parameters on the surface roughness of micro-structure components is carried out using a three factor, three-level BBD experiment that is founded on the second-order response surface method. The findings indicate that the feed per tooth influences surface roughness more significantly than cutting depth and cutting speed for a reasonable range of cutting parameters; Surface roughness will rise with lower or higher cutting speeds; Raising the feed per tooth and the cutting speed simultaneously may reduce surface roughness; Surface roughness can be accurately predicted and controlled using the second-order response surface method.
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- 2024
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66. A pipe arrangement structure triboelectric nanogenerator for mechanical energy harvesting and sports training monitoring
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Zhiyuan Duan, Nan Ge, Cho Hong-Kwan, and Song Sin-Young
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Biotechnology ,TP248.13-248.65 ,Physics ,QC1-999 - Abstract
Recently, intelligent wearable sensors applied in the field of smart sports have attracted much attention. Hence, we designed a pipe arrangement structure triboelectric nanogenerator (PA-TENG), and it can obtain mechanical energy and monitor sports motion. The triboelectric materials are composed of a polydimethylsiloxane layer attached to a silicone tube and nylon layer. The conductive copper attached to the silicone tube surface serves as a conductive electrode of the PA-TENG. Meanwhile, the soft silicone tube can endow the PA-TENG device with the ability to sense pressure. The results indicate that this silicone tube substrate can effectively adsorb conductive copper layers, and the conductive electrode layer still maintains good conductivity stability at different bending angles (15°–90°). The PA-TENG can achieve the maximum output power of 1.03 mW (matched load: 6 MΩ). The results indicate that the PA-TENG can attain the open-circuit voltage (Voc) of 190.05 V and the short-circuit current (Isc) of 1.98 μA. The transfer charge (Qsc) of the PA-TENG can arrive at 139.01 nC. The PA-TENG can drive the light-emitting diodes (LEDs), which demonstrates good practicality. Moreover, the PA-TENG can be installed on human joints (fingers, arms, knees, feet, etc.) as a monitoring sensor for various sports training, providing real-time sensing data for training. This research provides a novel pipe arrangement substrate for the wearable sports training sensor.
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- 2024
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67. Augmented Reality Improves Pediatric Mask Induction: A Prospective, Matched Case-Control Study
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Romy Yun MD, Emily M He BS, Michelle Zuniga BS, Nan Guo PhD, Ellen Y Wang MD, Florence Ho MA, CCLS, Molly Pearson CCLS, Samuel T Rodriguez MD, and Thomas J Caruso MD, PhD
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Medicine (General) ,R5-920 - Abstract
Introduction: Pediatric perioperative anxiety is a significant problem during mask induction for general anesthesia. Immersive technologies, such as extended reality headsets, are a promising strategy for alleviating anxiety. Our primary aim was to investigate mask acceptance during inhalational induction utilizing augmented reality (AR). Methods: This was a prospective, matched case-control study at a quaternary academic hospital. Fifty pediatric patients using AR for mask induction were matched to 150 standard-of-care (SOC) controls. The primary outcome was measured with the Mask Acceptance Scale (MAS). Secondary outcomes of cooperation and emergent delirium (ED) were assessed. Results: MAS scores ≥2 occurred at 4% (95% CI [0, 9.4%]) with AR versus 19.3%, (95% CI [13%, 25.7%]) with SOC (RR 0.21, 95% CI [0.05, 0.84], P = .027). Ninety-eight percent of AR patients were cooperative versus 91.3% with SOC ( P = .457). Zero percent had ED with AR versus 0.7% with SOC ( P = 1.000). Conclusions: AR during mask induction improved mask acceptance compared to SOC. No relationship was observed between AR and cooperation or ED. Future research will investigate the integration of AR into clinical practice as a nonpharmacologic intervention.
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- 2024
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68. Improved visualization of median, ulnar nerves, and small branches in the wrist and palm using contrast-enhanced magnetic resonance neurography
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Jiamin Kang, Wenjun Wu, Xiangchuang Kong, Yu Su, Dingxi Liu, Chungao Li, Nan Gao, Youzhi Wang, Chuansheng Zheng, Yuxiong Weng, and Lixia Wang
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Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Background: Magnetic resonance imaging of peripheral nerves in the wrist and palm is challenging due to the small size, tortuous course, complex surrounding tissues, and accompanying blood vessels. The occurrence of carpal palmar lesions leads to edema, swelling, and mass effect, which may further interfere with the display and identification of nerves. Objective: To evaluate whether contrast-enhanced magnetic resonance neurography (ceMRN) improves the visualization of the morphology and pathology of the median, ulnar nerves, and their small branches in the wrist and palm. Design: An observational study. Methods: In total 57 subjects, including 36 volunteers and 21 patients with carpal palmar lesions, were enrolled and underwent ceMRN and non-contrast MRN (ncMRN) examination at 3.0 Tesla. The degree of vascular suppression, nerve visualization, diagnostic confidence, and lesion conspicuity was qualitatively assessed by two radiologists. Kappa statistics were obtained for inter-reader agreement. The signal-to-noise ratio, contrast ratio (CR), and contrast-to-noise ratio (CNR) of the median nerve were measured. The subjective ratings and quantitative measurements were compared between ncMRN and ceMRN. Results: The inter-reader agreement was excellent ( k > 0.8) for all qualitative assessments and visualization assessment of each nerve segment. Compared with ncMRN, ceMRN significantly improved vascular suppression in volunteers and patients (both p
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- 2024
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69. Epigenetic modification: A novel insight into diabetic wound healing
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Cong-Cong Ju, Xiao-Xiao Liu, Li-hua Liu, Nan Guo, Le-wei Guan, Jun-xian Wu, and De-Wu Liu
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Diabetic wound ,Epigenetics ,Histone modification ,DNA methylation ,N6- methyladenosine ,Non-coding RNA ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Wound healing is an intricate and fine regulatory process. In diabetic patients, advanced glycation end products (AGEs), excessive reactive oxygen species (ROS), biofilm formation, persistent inflammation, and angiogenesis regression contribute to delayed wound healing. Epigenetics, the fast-moving science in the 21st century, has been up to date and associated with diabetic wound repair. In this review, we go over the functions of epigenetics in diabetic wound repair in retrospect, covering transcriptional and posttranscriptional regulation. Among these, we found that histone modification is widely involved in inflammation and angiogenesis by affecting macrophages and endothelial cells. DNA methylation is involved in factors regulation in wound repair but also affects the differentiation phenotype of cells in hyperglycemia. In addition, noncodingRNA regulation and RNA modification in diabetic wound repair were also generalized. The future prospects for epigenetic applications are discussed in the end. In conclusion, the study suggests that epigenetics is an integral regulatory mechanism in diabetic wound healing.
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- 2024
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70. Biofouling resistant materials based on micro‐structured surfaces with liquid‐repellent properties
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Thanaphun Jitniyom, Anvesh Gaddam, Georgia Williams, James Churm, Karl Dearn, Manuel Banzhaf, Felicity de Cogan, Stefan Dimov, and Nan Gao
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anti‐biofouling ,droplet impact ,micro‐porous structure ,polymer ,superhydrophobic surfaces ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
Abstract Adhesion of contaminants on various polymer‐based devices during fluid‐substrate interactions is a common problem that can cause biofouling and corrosion. In this study, hierarchical structures with submicron features on polypropylene (PP), high‐density polyethylene (HDPE), and polycarbonate (PC) are fabricated by femtosecond laser ablation. The effect of the hierarchical structures on surface wettability, droplet impact, and bacterial attachment has been examined. Our results demonstrate that the structured polymeric substrates facilitate large contact angles and minimal interfacial adhesion, allowing droplets to roll off at a low angle of inclination below 5°. Further, rendering the hierarchical structures with a low‐surface‐energy coating can enable the surfaces to exhibit superamphiphobic properties. The low interfacial adhesion properties, as accounted by the large contact angles and small contact angle hysteresis, of such surfaces prevent bacterial attachment and biofilm formation. The findings provide a design principle for creating affordable biofouling resistant surfaces with a submicron topography that can be used for engineering and biomedical devices.
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- 2024
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71. The influence of ventilation modes on oil mist particles diffusion in a machining workshop
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Yilin Li, Shiji Zong, Huaiwang Jing, Nan Gao, Heping Ye, and Jianbo Chen
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Ventilation mode ,Oil mist ,Particles concentration ,Machining workshop ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Mechanical processing and operations are widely involved in modern industry. Large amount of oil mist is tended to be produced and will diffuse in the processing workshop when metalworking fluids are applied on the high temperature workpiece. The ventilation modes and air distributions can influence the air pollutants dilution in machining workshops. Therefore, this paper presents both experimental investigation and simulation study on the oil mist particles diffusion under different ventilation modes. The results identified PM2.5 as the primary component among different oil mist particles generated during a typical machining process. The distribution of oil mist particles in a full-scale machining workshop laboratory was investigated under two ventilation modes: high-sidewall nozzle air supply and low-sidewall air supply. Results revealed obvious influences of both air supply modes on the distribution of oil mist particles. Under the high-sidewall-nozzle air supply mode, the airflow and the oil mist distribution in the workshop was relatively uniform; while the low-sidewall-vent air supply mode led to an uneven distribution of oil mist particles, and the maximum oil mist concentration appeared at the height of 3 m. Under both modes, the attempts to increase the airflow rate are not always successful. Compared with low-sidewall-vent air supply mode, the high-sidewall-nozzle air supply mode presents better performance in achieving lower overall particle concentration level. Overall, the results of this study give useful reference to improve the air quality of industrial plant by properly designing the ventilation mode of machining workshop.
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- 2024
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72. Long-term stability of clinical-grade lentiviral vectors for cell therapy
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Julie K. Jadlowsky, Rachel Leskowitz, Stephen McKenna, Jayashree Karar, Yujie Ma, Anlan Dai, Gabriela Plesa, Fang Chen, Kathleen Alexander, Jennifer Petrella, Nan Gong, Wei-Ting Hwang, Olivia Farrelly, Julie Barber-Rotenberg, Shannon Christensen, Vanessa E. Gonzalez, Anne Chew, Joseph A. Fraietta, and Carl H. June
- Subjects
titer stability ,potency ,transduction efficiency ,lentiviral vector ,cell therapy ,Genetics ,QH426-470 ,Cytology ,QH573-671 - Abstract
The use of lentiviral vectors in cell and gene therapy is steadily increasing, both in commercial and investigational therapies. Although existing data increasingly support the usefulness and safety of clinical-grade lentiviral vectors used in cell manufacturing, comprehensive studies specifically addressing their long-term stability are currently lacking. This is significant considering the high cost of producing and testing GMP-grade vectors, the limited number of production facilities, and lengthy queue for production slots. Therefore, an extended shelf life is a critical attribute to justify the investment in large vector lots for investigational cell therapies. This study offers a thorough examination of essential stability attributes, including vector titer, transduction efficiency, and potency for a series of clinical-grade vector lots, each assessed at a minimum of 36 months following their date of manufacture. The 13 vector lots included in this study were used for cell product manufacturing in 16 different clinical trials, and at the time of the analysis had a maximum storage time at −80°C of up to 8 years. The results emphasize the long-term durability and efficacy of GMP-grade lentiviral vectors for use in ex vivo cell therapy manufacturing.
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- 2024
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73. Continuous wound infusion catheter as part of a multimodal analgesia regimen for post-Caesarean delivery pain: a quality improvement impact study
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Cedar Fowler, Emily Stockert, Dan Hoang, Nan Guo, Edward Riley, Pervez Sultan, and Brendan Carvalho
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local anaesthetic ,opioid usage ,practice change ,quality improvement ,wound infusion ,Anesthesiology ,RD78.3-87.3 - Abstract
Background: The role of continuous wound infusion catheters as part of a multimodal analgesia strategy after Caesarean delivery is unclear. We introduced continuous wound infusion catheters to our multimodal analgesia regimen to evaluate the impact on analgesic outcomes after Caesarean delivery. Methods: After institutional review board (IRB) approval, a 4-month practice change was instituted as a quality improvement initiative. In addition to multimodal analgesia, continuous wound infusion catheters for up to 3 days were offered on alternate weeks for all women undergoing Caesarean deliveries. The primary outcome was postoperative in-hospital opioid consumption. Secondary outcomes were static and dynamic pain scores at 24 and 72 h, time until first analgesic request, opioid-related side-effects, length of stay, satisfaction (0–100%), and continuous wound infusion catheter-related complications. Results: All women scheduled for Caesarean delivery (n=139) in the 4-month period were included in the analysis, with 70 women receiving continuous wound infusion catheters, and 69 in the control group. Opioid consumption (continuous wound infusion catheter group 11.3 [7.5–61.9] mg morphine equivalents vs control group 30.0 [11.3–48.8] mg morphine equivalents), pain scores (except 24 h resting pain scores which were higher in the control group 2 [1–3] vs 1.5 [0–3] in the continous wound infusion catheters group; P=0.05), side-effects, length of stay, and complications were similar between groups. Satisfaction scores at 24 h were higher with continuous wound infusion catheters (100% [91–100%] vs 90% [86–100%]; P=0.003) with no differences at 72 h. One patient demonstrated symptoms of systemic local anaesthetic toxicity which resolved without significant harm. Conclusions: The addition of continuous wound infusion catheters to a multimodal analgesia regimen for post-Caesarean delivery pain management demonstrated minimal clinically significant analgesic benefits. Future studies are needed to explore the use of continuous wound infusion catheters in populations that may benefit most from this intervention.
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- 2024
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74. Histopathologic findings characteristic of CARD14‐associated papulosquamous eruption
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Ring, Nan G., primary, Craiglow, Brittany G., additional, Panse, Gauri, additional, Antaya, Richard J., additional, Ashack, Kurt, additional, Ashack, Richard, additional, Faith, Esteban F., additional, Paller, Amy S., additional, McNiff, Jennifer M., additional, Choate, Keith A., additional, and Ko, Christine J., additional
- Published
- 2019
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75. A 56-Year-Old Woman with Dyspareunia
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Nan G. O’Connell
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business.industry ,Medicine ,business - Published
- 2019
76. Epidemiology of Human Parainfluenza Virus Infections among Pediatric Patients in Hainan Island, China, 2021–2023
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Meifang Xiao, Afreen Banu, Xiangyue Zeng, Shengjie Shi, Ruoyan Peng, Siqi Chen, Nan Ge, Cheng Tang, Yi Huang, Gaoyu Wang, Xiaoyuan Hu, Xiuji Cui, Jasper Fuk-Woo Chan, Feifei Yin, and Meng Chang
- Subjects
human parainfluenza virus ,COVID-19 pandemic ,pediatric patients ,epidemiology ,Hainan Island ,Medicine - Abstract
Human parainfluenza viruses (HPIVs) are the leading causes of acute respiratory tract infections (ARTIs), particularly in children. During the COVID-19 pandemic, non-pharmaceutical interventions (NPIs) significantly influenced the epidemiology of respiratory viruses. This study analyzed 19,339 respiratory specimens from pediatric patients with ARTIs to detect HPIVs using PCR or tNGS, focusing on the period from 2021 to 2023. HPIVs were identified in 1395 patients (7.21%, 1395/19,339), with annual detection rates of 6.86% (303/4419) in 2021, 6.38% (331/5188) in 2022, and 7.82% (761/9732) in 2023. Notably, both the total number of tests and HPIV-positive cases increased in 2023 compared to 2021 and 2022. Seasonal analysis revealed a shift in HPIV prevalence from winter and spring in 2021–2022 to spring and summer in 2023. Most HPIV-positive cases were in children aged 0–7 years, with fewer infections among those aged 7–18 years. Since June 2022, HPIV-3 has been the most prevalent serotype (59.55%, 524/880), whereas HPIV-2 had the lowest proportion (0.80%, 7/880). The proportions of HPIV-1 (24.89%, 219/880) and HPIV-4 (15.45%, 136/880) were similar. Additionally, the incidence of co-infections with other common respiratory pathogens has increased since 2021. This study highlights rising HPIV detection rates post-COVID-19 and underscores the need for continuous surveillance of HPIVs to inform public health strategies for future epidemic seasons.
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- 2024
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77. Maltol Improves Peripheral Nerve Function by Inhibiting Schwann Cell Apoptosis via the PERK/eIF2α/CHOP Pathway and MME Upregulation in Diabetic Peripheral Neuropathy
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Jiawei Li, Quan Liu, Shuainan Liu, Hong Xin, Xuemei Zhang, and Nan Guo
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maltol ,apoptosis ,MME ,ER stress ,Schwann cells ,diabetic peripheral neuropathy ,Medicine ,Pharmacy and materia medica ,RS1-441 - Abstract
Diabetic peripheral neuropathy (DPN) is the most prevalent chronic complication among diabetic patients and a primary risk factor contributing to the deterioration of diabetic foot conditions. The pathogenesis of DPN remains complex and not fully understood, and there are hardly any effective treatment drugs. Maltol (3-hydroxy-2-methyl-4-pyranone) has demonstrated antioxidant and anti-inflammatory properties. However, the potential role of maltol in the treatment of DPN remains unclear. This study aimed to assess maltol’s effects on DPN rats and high glucose (HG)/palmitic acid (PA)-induced rat Schwann cells (RSC96). The results indicated maltol’s capacity to enhance peripheral nerve function in DPN rats. In RSC96 cells stimulated with high HG and PA, maltol treatment reduced DPN markers and apoptosis-related proteins. Functional enrichment analysis of differentially expressed genes revealed that endoplasmic reticulum (ER) stress pathways were involved in this process. Western blot results demonstrated the activation of ER stress pathway in HG/PA-induced RSC96 cells, with maltol attenuating ER stress-related protein expression. Furthermore, the knockdown of Membrane metallo-endopeptidase (MME) reversed maltol’s effects on apoptosis-related protein expression, suggesting a potential therapeutic role for maltol via MME in treating DPN. These findings indicate that maltol may hold promise as a therapeutic agent for DPN treatment.
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- 2024
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78. An Elastic-Plastic Constitutive Model for Unsaturated Structural Loess
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Denghui Gao, Kuanyao Zhao, Yichuan Xing, Nan Guo, and Xiaohui Yang
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intact loess ,unsaturated ,constitutive model ,structure ,mechanical properties ,axisymmetric stress state ,Mathematics ,QA1-939 - Abstract
The water sensitivity and structural characteristics of collapsible loess are two typical factors that significantly influence its mechanical behaviors. This paper presents a simple and practical elastic-plastic model based on the modified Cam-Clay model to well capture the essential behavior of unsaturated intact loess. The model employs deviator stress and spheric stress as the stress variables, with the water content serving as the moisture variable. The critical state surface of the model can be determined by utilizing the shear strength parameters of unsaturated soil under axisymmetric stress conditions. An initial yield surface equation is established by incorporating structural strength into the elliptical yield surface equation, which is used to determine the starting point for elastic-plastic deformation calculations under different humidity and stress combinations. The model comprises several parameters, each of which has a clear physical interpretation and can be conveniently obtained through conventional triaxial tests. The validity of the model for unsaturated intact loess is confirmed through a comparison with the stress–strain relationship of unsaturated intact loess in the axisymmetric stress state. This work has the potential to significantly enhance our ability to predict and mitigate potential geotechnical disasters, such as foundation deformation under axisymmetric conditions and slope stability problems under non-axisymmetric conditions. Ultimately, the application of this model could contribute to the safety and stability of infrastructure and construction projects in loess regions.
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- 2024
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79. Interactions between Inhibitors and 5-Lipoxygenase: Insights from Gaussian Accelerated Molecular Dynamics and Markov State Models
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Yuyang Liu, Kaiyu Wang, Fuyan Cao, Nan Gao, and Wannan Li
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5-lipoxygenase ,Markov state models ,GaMD ,allosteric inhibition ,Biology (General) ,QH301-705.5 ,Chemistry ,QD1-999 - Abstract
Inflammation is a protective stress response triggered by external stimuli, with 5-lipoxygenase (5LOX) playing a pivotal role as a potent mediator of the leukotriene (Lts) inflammatory pathway. Nordihydroguaiaretic acid (NDGA) functions as a natural orthosteric inhibitor of 5LOX, while 3-acetyl-11-keto-β-boswellic acid (AKBA) acts as a natural allosteric inhibitor targeting 5LOX. However, the precise mechanisms of inhibition have remained unclear. In this study, Gaussian accelerated molecular dynamics (GaMD) simulation was employed to elucidate the inhibitory mechanisms of NDGA and AKBA on 5LOX. It was found that the orthosteric inhibitor NDGA was tightly bound in the protein’s active pocket, occupying the active site and inhibiting the catalytic activity of the 5LOX enzyme through competitive inhibition. The binding of the allosteric inhibitor AKBA induced significant changes at the distal active site, leading to a conformational shift of residues 168–173 from a loop to an α-helix and significant negative correlated motions between residues 285–290 and 375–400, reducing the distance between these segments. In the simulation, the volume of the active cavity in the stable conformation of the protein was reduced, hindering the substrate’s entry into the active cavity and, thereby, inhibiting protein activity through allosteric effects. Ultimately, Markov state models (MSM) were used to identify and classify the metastable states of proteins, revealing the transition times between different conformational states. In summary, this study provides theoretical insights into the inhibition mechanisms of 5LOX by AKBA and NDGA, offering new perspectives for the development of novel inhibitors specifically targeting 5LOX, with potential implications for anti-inflammatory drug development.
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- 2024
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80. Comparison of Fractional Flow Reserve and Resting Full-Cycle Ratio in the Functional Assessment of Coronary Artery Stenosis in Patients with Non-ST-Segment Elevation Acute Coronary Syndrome
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Yumeng Lei, Mao Jiang, Xu Liu, Shuaiyong Zhang, Mengyao Li, Yunfei Wang, Ming Chen, Nan Guo, Yongxing Liu, Xufen Cao, and Liqiu Yan
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fractional flow reserve ,resting full-cycle ratio ,acute coronary syndrome ,functional assessment ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background: This study investigated factors influencing discrepancies between fractional flow reserve (FFR) and resting full-cycle ratio (RFR) in the functional assessment of coronary artery stenosis in patients with non-ST-segment elevation acute coronary syndrome (NSTE-ACS). Methods: We included 320 diseased vessels from 253 consecutive patients with NSTE-ACS. Vessels were categorized into four groups based on FFR ≤0.80 and RFR ≤0.89 thresholds: group 1 concordant negative (RFR–/FFR–), group 2 positive RFR and negative FFR (RFR+/FFR–), group 3 negative RFR and positive FFR (RFR–/FFR+), and group 4 concordant positive (RFR+/FFR+). Univariate and multivariate logistic regression analyses were conducted to identify predictors of diagnostic discrepancy between FFR and RFR. Results: Of the 320 diseased vessels, 182 (56.9%) were in group 1 (RFR–/FFR–), 33 (10.3%) in group 2 (RFR+/FFR–), 31 (9.7%) in group 3 (RFR–/FFR+), and 74 (23.1%) in group 4 (RFR+/FFR+). The concordance between FFR and RFR was 80.0%. Notably, left anterior descending artery (LAD) lesions exhibited significantly lower consistency compared to non-LAD lesions (p = 0.001), with distinct differences in FFR and RFR values between these groups (p < 0.001). The presence of a LAD lesion emerged as an independent predictor of diagnostic inconsistency between positive RFR and negative FFR measurements (p = 0.001). Conclusions: LAD involvement independently predicts diagnostic discrepancies between FFR and RFR in evaluating functional coronary artery stenosis in NSTE-ACS patients.
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- 2024
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81. Bearing Health State Detection Based on Informer and CNN + Swin Transformer
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Chunyang Liu, Weiwei Zou, Zhilei Hu, Hongyu Li, Xin Sui, Xiqiang Ma, Fang Yang, and Nan Guo
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infrared image ,fault recognition ,CNN ,swin transformer ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
In response to the challenge of timely fault identification in the spindle bearings of machine tools operating in complex environments, this study proposes a method based on a combination of infrared imaging with an Informer and a CNN + Swin Transformer. The aim is to achieve real-time monitoring of bearing faults, precise fault localization, and classification of fault severity. To accomplish this, an angular contact ball bearing was chosen as the research subject. Initially, an infrared image dataset was constructed, encompassing various fault positions and degrees, by simulating different forms of bearing faults. Subsequently, an Informer-based bearing temperature prediction model was established to select faulty bearing data. Lastly, the faulty data were input into the CNN + Swin Transformer model for bearing fault recognition and classification. The results demonstrate that the Informer model accurately identifies abnormal temperature rises during bearing operation, effectively screening out faulty bearings. Under steady-state conditions, the model achieves a classification accuracy of 97.8%. Furthermore, after employing the Informer screening process, the proposed model exhibits a recognition precision of 98.9%, surpassing other models such as CNN, SVM, and Swin Transformer, which are mentioned in this paper.
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- 2024
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82. Recapitulation of HIV-1 Neutralization Breadth in Plasma by the Combination of Two Broadly Neutralizing Antibodies from Different Lineages in the Same SHIV-Infected Rhesus Macaque
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Yanxin Gai, Nan Gao, Zhaoyang Mou, Chumeng Yang, Libian Wang, Wanshan Ji, Tiejun Gu, Bin Yu, Chu Wang, Xianghui Yu, and Feng Gao
- Subjects
neutralization ,rhesus macaque ,vaccine ,HIV-1 ,simian-human immunodeficiency virus ,broadly neutralizing antibodies ,Biology (General) ,QH301-705.5 ,Chemistry ,QD1-999 - Abstract
Viral infection generally induces polyclonal neutralizing antibody responses. However, how many lineages of antibody responses can fully represent the neutralization activities in sera has not been well studied. Using the newly designed stable HIV-1 Env trimer as hook, we isolated two distinct broadly neutralizing antibodies (bnAbs) from Chinese rhesus macaques infected with SHIV1157ipd3N4 for 5 years. One lineage of neutralizing antibodies (JT15 and JT16) targeted the V2-apex in the Env trimers, similar to the J038 lineage bnAbs identified in our previous study. The other lineage neutralizing antibody (JT18) targeted the V3 crown region in the Env, which strongly competed with human 447-52D. Each lineage antibody neutralized a different set of viruses. Interestingly, when the two neutralizing antibodies from different lineages isolated from the same macaque were combined, the mixture had a neutralization breath very similar to that from the cognate sera. Our study demonstrated that a minimum of two different neutralizing antibodies can fully recapitulate the serum neutralization breadth. This observation can have important implications in AIDS vaccine design.
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- 2024
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83. Research on Temperature Rise Characteristics Prediction of Main Shaft Dual-Rotor Rolling Bearings in Aircraft Engines
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Kai Xu, Hao Hu, Nan Guo, Xiqiang Ma, and Xiaoping Li
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aero-engine bearing ,temperature rise prediction ,grease lubrication ,temperature rise characteristic ,Science - Abstract
Traditional aero-engine bearings rotate simultaneously with their inner and outer rings, which makes the temperature rise prediction model computationally large with low accuracy, and it cannot be accurately verified due to the means of testing. This paper presents a method for predicting the temperature rise characteristics of aero-engine bearings under composite load conditions. Firstly, the local method is used to calculate the heat generation from heat sources such as bearing spin, lubricant drag, and the differential sliding of steel ball and collar, respectively, then finite element modelling and steady-state thermal analysis are carried out for aero-engine bearings under the simultaneous action of axial and radial external loads, a double-rotor test setup is designed and the predictive model is validated, and finally, the influences of rotational speed and load on the temperature rise characteristics of the bearings are investigated. The study shows that the aero-engine bearing prediction model proposed in this paper has high accuracy; with the increase in the rotational speed of the inner ring of the bearing, the temperatures of both the inner and outer rings of the bearing increase significantly; the temperatures of the inner and outer rings of the bearing increase with the increase in the axial load, and the effect of the radial load on the temperature of the bearing is not obvious.
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- 2024
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84. An Experimental Study on the Frictional Behavior of Ultrathin Metal Sheets at Elevated Temperatures
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Yuhang Xia, Zeran Hou, Jinjun Tan, Wenyao Wang, Nan Guo, and Junying Min
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ultrathin metal sheets ,high temperature ,frictional behavior ,dynamic measurement ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
Hot forming is an effective approach for improving the formability of ultrathin metal sheets, such as those made of stainless steel and pure titanium. However, the increased friction coefficient between the tool and the high-temperature metal sheet negatively affects material flow during hot forming, potentially resulting in severe local thinning or even cracking. This study explores the frictional behavior of 0.1 mm thick ferritic stainless steel (FSS) and commercially pure titanium (CP-Ti) sheets at elevated temperatures. A friction testing apparatus was developed to measure the friction coefficients of these metal sheets from room temperature (25 °C) up to 600 °C. The friction coefficient of the FSS sheet increased monotonically with temperature, whereas that of the CP-Ti sheet first increased and then decreased. Post-friction testing microscopic examination demonstrated that built-up edges formed on the surfaces of the friction blocks when rubbed against the stainless steel, contributing to the higher friction coefficients. This study provides a foundation for understanding frictional behavior during the hot forming of ultrathin metal sheets.
- Published
- 2024
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85. Dynamic Behavior Analysis of Wax Crystals during Crude Oil Gelation
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Hang Dong, Runze Ma, Jian Zhao, Nan Guo, and Zhihua Wang
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Chemistry ,QD1-999 - Published
- 2023
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86. Genetic and ultrasonographic analyses of fetuses with 1q21.1q21.2 microdeletion/microduplication: a retrospective study
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Nan Guo, Huili Xue, Bin Liang, Hailong Huang, Meiying Cai, and Liangpu Xu
- Subjects
1q21.1q21.2 microdeletion/microduplication ,Genetic analysis ,Ultrasonographic analysis ,Chromosomal microarray analysis ,Penetrant genetic mutation ,Internal medicine ,RC31-1245 ,Genetics ,QH426-470 - Abstract
Abstract Background 1q21.1q21.2 microdeletions/microduplications are rare and incompletely penetrant genetic mutations, and only a few reports regarding their prenatal diagnosis are currently available. Here, we analyzed the ultrasonographic phenotypic characteristics of fetuses with these mutations to improve the understanding, diagnosis, and screening of these mutations during gestation. Methods We retrospectively analyzed 8700 cases of pregnant women who underwent invasive prenatal screening by karyotyping and chromosomal microarray analysis (CMA) between November 2016 and November 2021. Results CMA revealed copy number changes in the 1q21.1q21.2 region of eleven fetuses, of which five had microdeletions and six had microduplications. These eleven fetuses exhibited variable ultrasonographic phenotypes. Of the five fetuses with the microdeletion, one exhibited a right-dominant heart, permanent right umbilical vein, and mild tricuspid regurgitation, another showed thickened nuchal translucency, and the remaining three had normal ultrasound phenotypes. Two of the six cases with 1q21.1q21.2 microduplication had structural malformations; one of them had a bilateral subependymal cyst, neck mass, and enlarged cardiothoracic ratio, while the other had right ventricular hypoplasia. Of the remaining four cases, two exhibited nasal bone dysplasia, one showed measurement slower than that during menopause and mild tricuspid regurgitation, and another did not show any notable abnormality in ultrasound examination. Among the eleven cases of 1q21.1q21.2 microdeletion/microduplication, only the parents of two fetuses underwent pedigree verification. The parents of these two fetuses with 1q21.1q21.2 microdeletion syndrome chose to continue the pregnancy, and all aspects of postnatal follow-up were normal. The parents of the other nine fetuses refused pedigree verification; of these cases, four cases terminated, and five cases continued the pregnancies. The five continued pregnancies were followed up after birth; no abnormalities were found. Conclusions Fetuses with 1q21.1q21.2 microdeletion/microduplication show different ultrasound characteristics and may have congenital heart disease, thickened nuchal translucency, and nasal bone dysplasia or show no notable abnormalities in an ultrasound examination. Our study highlights that CMA as a powerful diagnostic tool for these diseases can provide an accurate genetic diagnosis, while improving prenatal diagnosis standards.
- Published
- 2023
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87. Two microRNAs of plasma-derived small extracellular vesicles as biomarkers for metastatic non-small cell lung cancer
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Nan Geng, Yaopu Qi, Wenwen Qin, Si Li, Hao Jin, Yifang Jiang, Xiuhuan Wang, Shanna Wei, and Ping Wang
- Subjects
Non-small cell lung cancer ,Small extracellular vesicles ,Gene Ontology ,Kyoto Encyclopedia of genes and genomes ,miRNA enrichment analysis and annotation tool ,ClueGO analysis ,Diseases of the respiratory system ,RC705-779 - Abstract
Abstract Background MicroRNAs (miRNAs) of plasma-derived small extracellular vesicles (sEVs) have been proven to be associated with metastasis in several types of cancer. This study aimed to detect miRNAs of plasma-derived sEVs as potential biomarkers for metastatic non-small cell lung cancer (NSCLC). Methods We assessed the miRNA profiles of plasma-derived sEVs from healthy individuals as the control group (CT group), NSCLC patients without distant organ metastasis as the NM-NSCLC group and patients with distant organ metastasis as the M-NSCLC group. Next-generation sequencing (NGS) was performed on samples, and differentially expressed miRNAs (DEMs) of the three groups were screened. Kyoto Encyclopedia of Genes and Genomes (KEGG) and ClueGO were used to predict potential pathways of DEMs. MiRNA enrichment analysis and annotation tool (miEAA) was used to understand changes in the tumour microenvironment in NSCLC. Quantitative reverse transcription polymerase chain reaction (qRT‒PCR) analysis was used to validate target miRNAs. Result NGS was performed on 38 samples of miRNAs of plasma-derived sEVs, and DEMs were screened out between the above three groups. Regarding the distribution of DEMs in the NM-NSCLC and M-NSCLC groups, KEGG pathway analysis showed enrichment in focal adhesion and gap junctions and ClueGO in the Rap1 and Hippo signaling pathways; miEAA found that fibroblasts were over-represented. From our screening, miRNA-200c-3p and miRNA-4429 were found to be predictive DEMs among the CT, NM-NSCLC and M-NSCLC groups, and qRT‒PCR was applied to verify the results. Finally, it was revealed that expression levels of miR-200c-3p and miR-4429 were significantly upregulated in M-NSCLC patients. Conclusion This study identified miRNA-200c-3p and miRNA-4429 as potential biomarkers for NSCLC metastasis.
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- 2023
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88. Effects of multiple laser shock peening impacts on microstructure and wear performance of wire-based laser directed energy deposition 17-4PH stainless steel
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Nan Li, Qiang Wang, Wenjuan Niu, Liucheng Zhou, Peng Han, Yu Han, Jiaxu Li, Pu Song, Ning Hu, Nan Guo, Shenao Li, and Xinlei Pan
- Subjects
Laser shock peening ,Laser directed energy deposition ,Wear ,Residual stress ,Microhardness ,Mining engineering. Metallurgy ,TN1-997 - Abstract
As an advanced surface-strengthening technology, laser shock peening (LSP) is suitable for strengthening high-energy beam additive manufacturing components by improving the uneven temperature distribution and mechanical anisotropy problems. The present study investigated the influence of multiple LSP impacts on the microstructure evolution and wear performance of wire-based laser directed energy deposition (LDED) 17-4 PH stainless steel. Results showed that with the increase of LSP impacts, the average grain size of the wire-based LDED layer decreases and the dislocation density increases. Meanwhile, the residual stress was completely converted from tensile state to compressive state, and reaches the maximum value of 424 ± 15 MPa. In addition, the significant improvement of microhardness and wear resistance after 3 LSP impacts is attributed to the combined effects of grain refinement and dislocation strengthening.
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- 2023
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89. Comparative pharmacokinetics of polymyxin B in critically ill elderly patients with extensively drug-resistant gram-negative bacteria infections
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Juan Zeng, Bing Leng, Xiaoyan Guan, Shuangyan Jiang, Maoyu Xie, Wenying Zhu, Yue Tang, Lin Zhang, Jing Sha, Tengfei Wang, Min Ding, Nan Guo, and Jinjiao Jiang
- Subjects
polymyxin B ,pharmacokinetics ,elderly ,critical care ,total body weight ,renal function ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Introduction: Elderly patients are more prone to develop acute kidney injury during infections and polymyxin B (PMB)-associated nephrotoxicity than young patients. The differential response to PMB between the elderly and young critically ill patients is unknown. We aimed to assess PMB exposure in elderly patients compared with young critically ill patients, and to determine the covariates of PMB pharmacokinetics in critically ill patients.Methods: Seventeen elderly patients (age ≥ 65 years) and six young critically ill patients (age < 65 years) were enrolled. Six to eight blood samples were collected during the 12 h intervals after at least six doses of intravenous PMB in each patient. PMB plasma concentrations were quantified by high-performance liquid chromatography-tandem mass spectrometry. The primary outcome was PMB exposure as assessed by the area under the concentration-time curve over 24 h at steady state (AUCss, 0–24 h).Results and Discussion: The elderly group had lower total body weight (TBW) and higher Charlson comorbidity scores than young group. Neither AUCss, 0–24 h nor normalized AUCss, 0–24 h (adjusting AUC for the daily dose in mg/kg of TBW) was significantly different between the elderly group and young group. The half-life time was longer in the elderly patients than in young patients (11.21 vs 6.56 h respectively, p = 0.003). Age and TBW were the covariates of half-life time (r = 0.415, p = 0.049 and r = −0.489, p = 0.018, respectively). TBW was the covariate of clearance (r = 0.527, p = 0.010) and AUCss, 0–24 h (r = −0.414, p = 0.049). Patients with AUCss, 0–24 h ≥ 100 mg·h/L had higher baseline serum creatinine levels and lower TBW than patients with AUCss, 0–24 h < 50 mg·h/L or patients with AUCss, 0–24 h 50–100 mg·h/L. The PMB exposures were comparable in elderly and young critically ill patients. High baseline serum creatinine levels and low TBW was associated with PMB overdose.Trial registration: ChiCTR2300073896 retrospectively registered on 25 July 2023.
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- 2024
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90. EUS-guided interventional therapies for pancreatic diseases
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Rongmin Xu, Kai Zhang, Nan Ge, and Siyu Sun
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EUS ,pancreatic diseases ,treatment ,drainage ,ablation ,celiac plexus neurolysis ,Medicine (General) ,R5-920 - Abstract
Endoscopic ultrasound (EUS) is an integrated diagnostic technique merging endoscope and ultrasound to examine the digestive system. EUS has emerged as a primary diagnostic method for pancreatic diseases due to its distinctive benefits. Over the past four decades, EUS has undergone a transformation, shifting its role from primarily diagnostic to increasingly therapeutic. Additionally, in recent years, EUS has emerged as an increasingly prominent adjunctive or alternative approach to conventional surgical interventions. This review provides a comprehensive analysis of current technological approaches in the treatment of pancreatic diseases. The dynamic interplay with diverse therapeutic approaches has reinvigorated EUS and shaped its trajectory in the management of pancreatic diseases.
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- 2024
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91. Lactobacillus rhamnosus GG Stimulates Dietary Tryptophan-Dependent Production of Barrier-Protecting MethylnicotinamideSummary
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Panan Suntornsaratoon, Jayson M. Antonio, Juan Flores, Ravij Upadhyay, John Veltri, Sheila Bandyopadhyay, Rhema Dadala, Michael Kim, Yue Liu, Iyshwarya Balasubramanian, Jerrold R. Turner, Xiaoyang Su, Wei Vivian Li, Nan Gao, and Ronaldo P. Ferraris
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Metabolome ,Probiotic ,Transcriptome ,Tight Junction ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Background & Aims: Lacticaseibacillus rhamnosus GG (LGG) is the world’s most consumed probiotic but its mechanism of action on intestinal permeability and differentiation along with its interactions with an essential source of signaling metabolites, dietary tryptophan (trp), are unclear. Methods: Untargeted metabolomic and transcriptomic analyses were performed in LGG monocolonized germ-free mice fed trp-free or -sufficient diets. LGG-derived metabolites were profiled in vitro under anaerobic and aerobic conditions. Multiomic correlations using a newly developed algorithm discovered novel metabolites tightly linked to tight junction and cell differentiation genes whose abundances were regulated by LGG and dietary trp. Barrier-modulation by these metabolites were functionally tested in Caco2 cells, mouse enteroids, and dextran sulfate sodium experimental colitis. The contribution of these metabolites to barrier protection is delineated at specific tight junction proteins and enterocyte-promoting factors with gain and loss of function approaches. Results: LGG, strictly with dietary trp, promotes the enterocyte program and expression of tight junction genes, particularly Ocln. Functional evaluations of fecal and serum metabolites synergistically stimulated by LGG and trp revealed a novel vitamin B3 metabolism pathway, with methylnicotinamide (MNA) unexpectedly being the most robust barrier-protective metabolite in vitro and in vivo. Reduced serum MNA is significantly associated with increased disease activity in patients with inflammatory bowel disease. Exogenous MNA enhances gut barrier in homeostasis and robustly promotes colonic healing in dextran sulfate sodium colitis. MNA is sufficient to promote intestinal epithelial Ocln and RNF43, a master inhibitor of Wnt. Blocking trp or vitamin B3 absorption abolishes barrier recovery in vivo. Conclusions: Our study uncovers a novel LGG-regulated dietary trp-dependent production of MNA that protects the gut barrier against colitis.
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- 2024
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92. Exploring KRAS-mutant pancreatic ductal adenocarcinoma: a model validation study
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Fan Yang, Yanjie He, Nan Ge, Jintao Guo, Fei Yang, and Siyu Sun
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pancreatic ductal adenocarcinoma ,KRAS mutations ,risk prediction model ,ferroptosis ,immune microenvironment ,potential drugs screening ,Immunologic diseases. Allergy ,RC581-607 - Abstract
IntroductionPancreatic ductal adenocarcinoma (PDAC) has the highest mortality rate among all solid tumors. Tumorigenesis is promoted by the oncogene KRAS, and KRAS mutations are prevalent in patients with PDAC. Therefore, a comprehensive understanding of the interactions between KRAS mutations and PDAC may expediate the development of therapeutic strategies for reversing the progression of malignant tumors. Our study aims at establishing and validating a prediction model of KRAS mutations in patients with PDAC based on survival analysis and mRNA expression.MethodsA total of 184 and 412 patients with PDAC from The Cancer Genome Atlas (TCGA) database and the International Cancer Genome Consortium (ICGC), respectively, were included in the study.ResultsAfter tumor mutation profile and copy number variation (CNV) analyses, we established and validated a prediction model of KRAS mutations, based on survival analysis and mRNA expression, that contained seven genes: CSTF2, FAF2, KIF20B, AKR1A1, APOM, KRT6C, and CD70. We confirmed that the model has a good predictive ability for the prognosis of overall survival (OS) in patients with KRAS-mutated PDAC. Then, we analyzed differential biological pathways, especially the ferroptosis pathway, through principal component analysis, pathway enrichment analysis, Gene Ontology (GO) enrichment analysis, and gene set enrichment analysis (GSEA), with which patients were classified into low- or high-risk groups. Pathway enrichment results revealed enrichment in the cytokine-cytokine receptor interaction, metabolism of xenobiotics by cytochrome P450, and viral protein interaction with cytokine and cytokine receptor pathways. Most of the enriched pathways are metabolic pathways predominantly enriched by downregulated genes, suggesting numerous downregulated metabolic pathways in the high-risk group. Subsequent tumor immune infiltration analysis indicated that neutrophil infiltration, resting CD4 memory T cells, and resting natural killer (NK) cells correlated with the risk score. After verifying that the seven gene expression levels in different KRAS-mutated pancreatic cancer cell lines were similar to that in the model, we screened potential drugs related to the risk score.DiscussionThis study established, analyzed, and validated a model for predicting the prognosis of PDAC based on risk stratification according to KRAS mutations, and identified differential pathways and highly effective drugs.
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- 2024
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93. Comparative efficacy of different Chinese patent medicines in preventing restenosis after percutaneous coronary intervention: a systematic review and Bayesian network meta-analysis of randomized clinical trials
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Jiasai Fan, Tianli Li, Fenglan Pu, Nan Guo, Jing Wang, Yuqian Gao, Hongbing Zhao, Xian Wang, and Haiyan Zhu
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Chinese patent medicines ,restenosis ,percutaneous coronary intervention ,efficacy ,Bayesian network meta-analysis ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Background: Chinese patent medicines (CMPs) have curative effectiveness in preventing coronary restenosis. However, the relative efficacy between different CPMs has not been sufficiently investigated.Methods: Randomized clinical trials were searched from electronic databases including PubMed, Web of Science, Cochrane Library, Embase, CNKI, VIP, WanFang, SinoMed, Chinese Clinical Trial Registry, and ClinicalTrials.gov. Bayesian network meta-analysis was performed to analyze CPMs’ efficacy in preventing angiographic restenosis, recurrence angina, acute myocardial infarction, and target lesion revascularization after percutaneous coronary intervention.Results: This network meta-analysis included 47 trials with 5,077 patients evaluating 11 interventions. Regarding angiographic restenosis, the efficacy of CPMs (except Xuezhikang capsule) combined with standard treatment (Std) was superior to Std alone, and Guanxin Shutong capsule plus Std reduced the risk of angiographic restenosis by 76% (relative risk 0.24, 95% confidence interval 0.11–0.45, and very low to moderate certainty of evidence), most likely the best intervention. Fufang Danshen dripping pill combined with Std showed superiority over other interventions for relieving recurrence angina, which can reduce the risk by 83% (RR 0.17, 95% CI 0.04–0.51, very low to moderate certainty of evidence) compared to Std alone. In acute myocardial infarction after percutaneous coronary intervention, compared with Std alone, Danhong injection plus Std displayed a significant effect (RR 0.11, 95% CI 0.00–0.69, very low to moderate certainty of evidence) and was the best treatment probably. Chuanxiongqin tablet plus Std was the most effective treatment for reducing target lesion revascularization by 90% (RR 0.10, 95% CI 0.00–0.60, very low to moderate certainty of evidence) compared with Std alone.Conclusion: The results indicated that CPMs combined with Std reduced the risk of coronary restenosis after percutaneous coronary intervention. However, the results should be interpreted cautiously due to significant data limitations.
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- 2024
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94. Diagnostic value of endoscopic ultrasound in groove pancreatitis
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Yu Mo She and Nan Ge
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Computerized tomography ,endoscopic ultrasound ,groove pancreatitis ,magnetic resonance imaging ,Medicine - Abstract
AbstractAim: Groove pancreatitis (GP) is a rare type of chronic pancreatitis characterized by varying degrees of thickening and scarring of the duodenal wall, duodenal lumen stenosis, mucosal hypertrophy with plicae and cyst formation. GP is primarily observed in middle-aged male patients with a history of alcohol consumption. Clinical symptoms are usually non-specific, and there is currently no unified diagnostic standard. However, imaging methods, particularly endoscopic ultrasound (EUS), are useful for diagnosis. EUS-guided biopsy can provide a strong basis for the final diagnosis. This review summarizes the value of EUS and its derivative technologies in the diagnosis, differential diagnosis and treatment of GP.Methods: After searching in PubMed and Web of Science databases using ‘groove pancreatitis (GP)’ and ‘endoscopic ultrasonography (EUS)’ as keywords, studies related were compiled and examined.Results: EUS and its derivative technologies are of great significance in the diagnosis, differential diagnosis, and treatment of GP, but there are still limitations that need to be comprehensively applied with other diagnostic methods to obtain the most accurate results.Conclusion: EUS has unique value in both the diagnosis and treatment of GP. Clinicians need to be well-versed in the advantages and limitations of EUS for GP diagnosis to select the most suitable imaging diagnostic method for different cases and to reduce the unnecessary waste of medical resources.
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- 2023
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95. The vascular and morphological characteristics of tumors under narrow-band imaging as predictors for the grade and stage of bladder cancer: a prospective and multi-center study
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Hao Liang, Qingya Yang, Hui Sun, Yang Xu, Jin Wang, Wei Huang, Nan Ge, Qiang Fu, Tongxiang Diao, Xuewen Jiang, Shouzhen Chen, Yan Li, Nianzhao Zhang, Benkang Shi, and Jun Chen
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Cystoscopy ,narrow-band imaging ,bladder cancer ,vascular morphology ,risk factor ,Medicine - Abstract
AbstractThe vascular and morphological features of tumors are important predictors of the nature, grade, and stage of various cancers. However, this association has not been tested in bladder cancer. The aim of our study was to investigate the correlation between the morphological characteristics of tumor vessels and the nature, stage and grade of bladder cancer. Between November 2021 and March 2023, we prospectively collated clinical information and cystoscopy information from a series of patients with bladder cancer. Univariate and multivariate logistic regression analysis were used to identify independent risk factors for the nature, grade and stage of bladder cancer. Our analysis showed that cauliflower-like tumors, dotted vessels, and circumferential vessels were independent risk factors for bladder cancer. Reticular vessels were an independent risk factor for high-grade bladder cancer. Thick branching vessels in bladder tumors, along with a wide base, were independent risk factors for the invasion of bladder cancer into the lamina propria. Primary diagnosis, lesion location (beside the left ureteral orifice) and obscure lesion boundaries were all identified as independent risk factors for muscle invasive bladder cancer.
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- 2023
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96. Electronic State Engineering in Perovskite‐Cerium‐Composite Nanocrystals toward Enhanced Triplet Annihilation Upconversion
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Nan Gong, Runchen Lai, Shiyu Xing, ZhengZheng Liu, Junyao Mo, Tao Man, Zicheng Li, Dawei Di, Juan Du, Dezhi Tan, Xiaofeng Liu, Jianrong Qiu, and Beibei Xu
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electronic state engineering ,triplet energy transfer ,triplet‐triplet annihilation ,upconversion ,Science - Abstract
Abstract Wavelength conversion based on hybrid inorganic–organic sensitized triplet–triplet annihilation upconversion (TTA‐UC) is promising for applications such as photovoltaics, light‐emitting‐diodes, photocatalysis, additive manufacturing, and bioimaging. The efficiency of TTA‐UC depends on the population of triplet excitons involved in triplet energy transfer (TET), the driving force in TET, and the coupling strength between the donor and acceptor. Consequently, achieving highly efficient TTA‐UC necessitates the precise control of the electronic states of inorganic donors. However, conventional covalently bonded nanocrystals (NCs) face significant challenges in this regard. Herein, a novel strategy to exert control over electronic states is proposed, thereby enhancing TET and TTA‐UC by incorporating ionic‐bonded CsPbBr3 and lanthanide Ce3+ ions into composite NCs. These composite‐NCs exhibit high photoluminescence quantum yield, extended single‐exciton lifetime, quantum confinement, and uplifted energy levels. This engineering strategy of electronic states engendered a comprehensive impact, augmenting the population of triplet excitons participating in the TET process, enhancing coupling strength and the driving force, ultimately leading to an unconventional, dopant concentration‐dependent nonlinear enhancement of UC efficiency. This work not only advances fundamental understanding of hybrid TTA‐UC but also opens a door for the creation of other ionic‐bonded composite NCs with tunable functionalities, promising innovations for next‐generation optoelectronic applications.
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- 2023
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97. Clinical application and follow-up of electrocautery-enhanced lumen-apposing metal stents for endoscopic ultrasonography-guided interventions
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Yu Mo She and Nan Ge
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Clinical application ,electrocautery-enhanced lumen-apposing metal stents ,endoscopic ultrasound ,long term follow-up ,Medicine - Abstract
AbstractAim: The lumen-apposing metal stent (LAMS) is a new device that expands the scope of gastrointestinal intervention under endoscopy. LAMS was initially used for the treatment of pancreatic fluid collections (PFCs), but is increasingly being used off-label. The electrocautery system simplifies the deployment of LAMS, making it more suitable for off-label situations. The short-term results of electrocautery-enhanced lumen-apposing metal stents (ECE-LAMS) are satisfactory; however, the long-term follow-up results must be evaluated. The aim of this article is to review the expanded clinical application of ECE-LAMS, the clinical value of on-label and off-label use, and follow-up results.Methods: After searching in PubMed and Web of Science databases using ‘electrocautery-enhanced lumen-apposing metal stents’ and ‘endoscopic ultrasonography (EUS) -guided interventions’ as keywords, studies related were compiled and examined.Results: ECE-LAMS are widely used for on-label and off-label situations. The short-term and long-term results of ECE-LAMS are satisfactory, but there are still some studies that do not agree with this viewpoint.Conclusion: The clinical application of ECE-LAMS is relatively safe and reliable but more well-designed randomized trials and prospective studies are needed to evaluate the impact of this technology on therapeutic EUS, to improve the safety and success rate of EUS-guided LAMS implantation, and to expand its application in other indications.
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- 2023
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98. 'A proof of life' through transition from hospital to home after a stroke in a Portuguese setting - a multi-perspective, longitudinal qualitative study
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Carla Mendes Pereira, Nan Greenwood, and Fiona Jones
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stroke ,caregivers ,adaptation ,home transition ,rehabilitation ,Medicine (General) ,R5-920 - Abstract
Purpose The impact of a stroke is particularly evident during the transition home, with reported unmet needs. However, little is known about post-stroke adaptation in Portugal. This study aimed to understand how Portuguese people with stroke and their informal carers/family adapt over time, and how health professionals support their adaptation. Methods A multi-perspective, longitudinal qualitative study was conducted using in-depth semi-structured interviews one and six months after inpatient discharge. A purposive sample of 24 participants (8 triads) participated. Thematic and narrative analysis strategies were used. Results Three themes were identified: Managing change over time; Balancing support over time; Changing priorities. These suggest the importance of time and gradual adjustment of health professionals’ approach throughout the rehabilitation process tailored to people with stroke’ and carers’ needs. Both valued positive thoughts and support from others to adjust life goals and find a balance between a mutual/bidirectional support and time for themselves. Conclusions Findings show that the manner in which changes after a stroke are approached may be positively transformed to provide strength. As a result of the deeper understanding gained from this study, health professionals may be better placed to acknowledge the needs of people with stroke and carers and find effective ways of supporting them.
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- 2023
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99. The future direction of China's cross-border insolvency laws, related issues and potential problems
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Parry, R and Nan, G
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The enactment of China's bankruptcy laws in 2006 was a necessary step in the development of its economy. This law represented a significant modernisation of the insolvency framework, supporting the transforming economy, but it was also a law of political expediency, for the enhancement of external relations. One aspect of the enhancement of external relations was the provision of cross-border insolvency rules. However this complex area of law was addressed in only one article, which was only a starting point, leaving many details unaddressed, and further reforms are required. In particular, it is desirable that the law provides a greater level of predictability as to the likely outcomes of cross-border insolvencies, to encourage inward trade and investment, as well as encourage external trade. Both inbound and outbound business dealings are important to China's continued economic development. \ud \ud It is clear also, however, that insolvency law and practice is still a developing area for China. The establishment of a modern and unified system of insolvency laws was a big step for China, representing a sacrifice of tight controls on insolvencies, but the impact of this law in practice is only recently developing, with a loosening of state controls, after a very slow start. The establishment of a cross-border insolvency framework represents a further challenge; one that is likely to beset with considerable difficulties, as any further development of this law would potentially entail some further loss of control over proceedings, not least in outbound cases, and resistance may be anticipated. In keeping with China’s historical approach to law-making in the area of bankruptcy law, it is likely that the cross-border insolvency framework will develop gradually and with caution. This article assesses the way forward in respect of cross-border insolvency laws, contending that an incremental approach over a period of years, in three broad stages, is required, with more developed and country specific approaches providing a link, or interim stage, between the clarification of the Article 5 and the formal adoption of the UNCITRAL Model Law in China.
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- 2018
100. Abstract A051: Melanoma displays an evolutionarily conserved resistance to upregulation of prophagocytic signals and to CD47 blockade
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Anderson, Katie L., primary, Snyder, Kristin M., additional, Ito, Daisuke, additional, Lins, Debra C., additional, Mills, Lauren J., additional, Weiskopf, Kipp, additional, Ring, Nan G., additional, Ring, Aaron M, additional, Shimizu, Yoji, additional, Mescher, Matthew F., additional, Weissman, Irving L., additional, and Modiano, Jaime F., additional
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- 2019
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