4,929 results on '"Hang Zhang"'
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2. Protection effect of cis 9, trans 11-conjugated linoleic acid on oxidative stress and inflammatory damage in bovine mammary epithelial cells
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Hang Zhang, Ni Dan, Yu-qiong Wang, and Chang-long Gou
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Cis 9, trans 11-conjugated linoleic acid ,Bovine mammary epithelial cells ,Oxidative stress ,Inflammation ,Medicine ,Science - Abstract
Abstract The present study was conducted to observe the protective effects of c9, t11- conjugated linoleic acid (CLA) on oxidative stress and inflammation in bovine mammary epithelial cells (BMECs) exposed to H2O2. The BMECs were treated with different concentrations of H2O2 for 8 h, 600 µmol/L was determined to be the damage concentration. Using different concentrations of c9, t11-CLA to process BMECs for 24 h, 50 and 100 µmol/L were determined to be the effective concentrations for subsequent analyses. Thus, four BMEC groups were established: Control group; H2O2 group; 50 µmol/L c9, t11-CLA + H2O2 group; 100 µmol/L c9, t11-CLA + H2O2 group. We observed that the H2O2 group exhibited significantly lower total antioxidant activity (T-AOC), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) activities and significantly higher secretions of malondialdehyde (MDA), interleukin (IL)-1β, IL-6, IL-8, and tumor necrosis factor (TNF)-α and expressions of IL-1β, IL-6, and IL-8 than the control group (p
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- 2024
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3. Effect of Copper Azole Preservative on the Surface Wettability and Interlaminar Shear Performance of Glulam Treated with Preservative
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Shuyan Wang, Hang Zhang, Jingqiu Xie, Qianning Wang, Ao Zhang, and Xiaojun Yang
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preservative treated glulam ,copper azole preservative ,surface wettability ,shear performances ,Biotechnology ,TP248.13-248.65 - Abstract
The application of copper azole (CA) preservative on glulam can improve the durability of the material. The effect of CA preservative was evaluated relative to the surface bonding quality of laminates with different surface conditions. The surface morphology and wettability of CA preservative-treated laminates were analyzed. A comparison was made on the interlaminar shear strength of preservative-treated glulam under varying environmental conditions. The atomic force microscope (AFM) diagrams showed that CA preservative adhered to the wood fibers’ surface and filled some wood cell cavities, thus reducing the water permeability of the treated laminate. Planing effectively enhanced the surface wettability of the preservative-treated laminate. The tiny particles of CA preservative on the planed laminate surface were distributed relatively uniformly, with a proportion smaller than that of the unplaned laminate. Furthermore, the interlaminar shear strength of preservative-treated glulam using planed laminates was at least 15% higher than that of unplaned laminates. In both hot and humid environments and natural aging tests, preservative-treated glulam bonded with resorcinol formaldehyde (RF) adhesive outperformed those bonded with polyurethane (PUR) adhesive. To ensure reliable quality of preservative-treated glulam, it is recommended to plane the laminate by 0.6 mm and use RF adhesive.
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- 2024
4. Estimation of speed-related car body acceleration limits with quantile regression
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Jianli Cong, Hang Zhang, Zilong Wei, Fei Yang, Zaitian Ke, Tao Lu, Rong Chen, Ping Wang, and Zili Li
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Car body acceleration ,Track status monitoring ,Speed-related acceleration limit ,Quantile regression ,Vehicle ride quality ,Transportation engineering ,TA1001-1280 ,Railroad engineering and operation ,TF1-1620 - Abstract
Purpose – This study aimed to facilitate a rapid evaluation of track service status and vehicle ride comfort based on car body acceleration. Consequently, a low-cost, data-driven approach was proposed for analyzing speed-related acceleration limits in metro systems. Design/methodology/approach – A portable sensing terminal was developed to realize easy and efficient detection of car body acceleration. Further, field measurements were performed on a 51.95-km metro line. Data from 272 metro sections were tested as a case study, and a quantile regression method was proposed to fit the control limits of the car body acceleration at different speeds using the measured data. Findings – First, the frequency statistics of the measured data in the speed-acceleration dimension indicated that the car body acceleration was primarily concentrated within the constant speed stage, particularly at speeds of 15.4, 18.3, and 20.9 m/s. Second, resampling was performed according to the probability density distribution of car body acceleration for different speed domains to achieve data balance. Finally, combined with the traditional linear relationship between speed and acceleration, the statistical relationships between the speed and car body acceleration under different quantiles were determined. We concluded the lateral/vertical quantiles of 0.8989/0.9895, 0.9942/0.997, and 0.9998/0.993 as being excellent, good, and qualified control limits, respectively, for the lateral and vertical acceleration of the car body. In addition, regression lines for the speed-related acceleration limits at other quantiles (0.5, 0.75, 2s, and 3s) were obtained. Originality/value – The proposed method is expected to serve as a reference for further studies on speed-related acceleration limits in rail transit systems.
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- 2024
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5. Long-term Efficacy of Pulmonary Artery Desnervation Treatment in Heart Failure With Preserved Ejection Fraction: A Subgroup Analysis of 3-year Results From the PADN-5 Study
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Hang Zhang, Wande Yu, Mengyu Zhang, Wei Li, Jing Kan, Dujiang Xie, Juan Zhang, and Shaoliang Chen
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Objective:. The Pulmonary Arterial Denervation in Patients With Pulmonary Hypertension Associated With the Left Heart Failure (PADN-5) study proved that pulmonary artery denervation (PADN) is associated with significant improvements in hemodynamic and clinical outcomes in patients with combined pre- and post-capillary pulmonary hypertension (CpcPH). This study aimed to assess the 3-year clinical results of PADN in patients who had heart failure with preserved ejection fraction (HFpEF) developing into CpcPH (HFpEF-CpcPH). Methods:. In this post hoc analysis of the PADN-5 trial, 38 patients with HFpEF were included in screening out of 98 patients with CpcPH who were randomly assigned to treatment with sildenafil and sham PADN (sham PADN (plus sildenafil) group, abbreviated as sham group) or PADN (PADN group). HFpEF in the PADN-5 trial was defined as a left ventricular ejection fraction ≥50%, and CpcPH was defined as a mean pulmonary arterial pressure ≥25 mmHg, a pulmonary arterial wedge pressure >15 mmHg, and a pulmonary vascular resistance >3.0 WU. The changes in the 6-minute walk distance (6-MWD) and the plasma concentration of N-terminal pro-brain natriuretic peptide (NT-proBNP) at 6-month and 3-year follow-up, as well as the clinical endpoint of the occurrence of clinical worsening, defined as cardiopulmonary-related death, rehospitalization, or heart or lung transplantation at 3-year follow-up were examined. Results:. Thirty-eight patients with HFpEF-CpcPH were assigned to the PADN group (n = 19) or the sham group (n = 19). At the 6-month follow-up, 6-MWD (433 (275, 580)m vs. 342 (161, 552)m), and reductions in NT-proBNP (−47% (−99%, 331%) vs. −12% (−82%, 54%)) were significantly improved in the PADN group (all P < 0.05). Over the 3-year follow-up period, PADN treatment resulted in marked increases in 6-MWD (450 (186, 510)m vs. 348 (135, 435)m) and reductions in NT-proBNP (−55% (−99%, 38%) vs. −10% (−80%, 95%)) (all P < 0.05). Clinical worsening was experienced by 12 patients (63%) in the sham group, but by only 5 patients (26%) in the PADN group (hazard ratio = 0.149, 95% confidence interval: 0.038–0.584, P = 0.006). The 6-MWD and PADN treatments were independent predictors of clinical deterioration in patients with HFpEF-CpcPH. Conclusions:. PADN therapy is associated with improvements in exercise capacity and clinical outcomes. PADN therapy may have a potential role in patients with HFpEF-CpcPH for whom current treatment options are limited.
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- 2024
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6. Gender-specific association between circulating serum Klotho and metabolic components in adults
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Zhenzhen Wang, Hang Zhang, Guixia Zheng, Zheng Wang, and Lei Shi
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Klotho ,Aging ,Metabolic syndrome ,Gender difference ,Diseases of the endocrine glands. Clinical endocrinology ,RC648-665 - Abstract
Abstract Background Klotho plays a pivotal role in human aging. Metabolic syndrome (MetS) is composed of multiple conditions that are also risk factors for cardiovascular disease and diabetes. We try to discuss gender-specific differences in Klotho and the associations between Klotho and MetS components. Materials and methods The National Health and Nutrition Examination Survey database from cycle 2015–2016 was analyzed. MetS was defined according to the 2005 updated criteria by the American Heart Association and National Heart Lung and Blood Institute. Gender-specific differences in serum Klotho, and associations between Klotho level and MetS components were examined. Results A total of 2475 participants (40–79 years old) with comprehensive data were included (52% women). In general, lower Klotho was associated with advanced age, male sex, tobacco use, elevated triglycerides, renal insufficiency, inflammation, low estradiol, and low sex hormone-binding globulin (SHBG). The correlation between MetS and Klotho was more obvious in women, mainly in waist circumference and triglyceride. There were no gender-specific differences in the associations between Klotho and renal dysfunction, but multivariate linear regression analysis showed gender differences in other factors associated with Klotho. Estradiol, SHBG, high-density lipoprotein cholesterol (HDL), and high-sensitivity C-reactive protein (CRP) were associated with Klotho levels independent of age and renal function in men, whereas in women, Klotho was independently associated with triglycerides and white blood cell count. Conclusion Klotho levels had gender disparities regardless of age, renal function, and sex hormones. In the current cohort, triglycerides were the major component of MetS that was independently associated with serum Klotho levels, and the association was particularly seen in women. However, HDL was found to be the male-specific MetS component independently associated with Klotho.
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- 2024
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7. Study on the Dispersion Characteristics of Coal Complex Resistivity under the Effect of Liquid Nitrogen Cyclic Freeze–Thaw and Evaluation of Permeability Enhancement
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Jian Li, Xiaokai Xu, Yugui Zhang, Hang Zhang, Haihai Hou, Lin Tian, Kuo Jian, Zhengzheng Xue, and Zehua Zhang
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Chemistry ,QD1-999 - Published
- 2024
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8. Intelligent pavement condition survey: Overview of current researches and practices
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Allen A. Zhang, Jing Shang, Baoxian Li, Bing Hui, Hongren Gong, Lin Li, You Zhan, Changfa Ai, Haoran Niu, Xu Chu, Zilong Nie, Zishuo Dong, Anzheng He, Hang Zhang, Dingfeng Wang, Yi Peng, Yifan Wei, and Huixuan Cheng
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Pavement condition survey ,Pavement data collection ,Artificial intelligence ,Machine learning ,Deep learning ,Pavement condition evaluation ,Highway engineering. Roads and pavements ,TE1-450 ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Automated pavement condition survey is of critical importance to road network management. There are three primary tasks involved in pavement condition surveys, namely data collection, data processing and condition evaluation. Artificial intelligence (AI) has achieved many breakthroughs in almost every aspect of modern technology over the past decade, and undoubtedly offers a more robust approach to automated pavement condition survey. This article aims to provide a comprehensive review on data collection systems, data processing algorithms and condition evaluation methods proposed between 2010 and 2023 for intelligent pavement condition survey. In particular, the data collection system includes AI-driven hardware devices and automated pavement data collection vehicles. The AI-driven hardware devices including right-of-way (ROW) cameras, ground penetrating radar (GPR) devices, light detection and ranging (LiDAR) devices, and advanced laser imaging systems, etc. These different hardware components can be selectively mounted on a vehicle to simultaneously collect multimedia information about the pavement. In addition, this article pays close attention to the application of artificial intelligence methods in detecting pavement distresses, measuring pavement roughness, identifying pavement rutting, analyzing skid resistance and evaluating structural strength of pavements. Based upon the analysis of a variety of the state-of-the-art artificial intelligence methodologies, remaining challenges and future needs with respect to intelligent pavement condition survey are discussed eventually.
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- 2024
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9. Microstructure and mechanical properties of extruded Mg–Zn–Mn–Ca alloys
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Sha Sha, Feng Wang, Rongguang Li, Hang Zhang, Wenyuan Cong, Boshu Liu, Shanshan Li, and Yan Tang
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Mg-Zn-Mn-Ca alloy ,Extrusion ,Strength ,Ductility ,Microstructure ,Precipitate ,Mining engineering. Metallurgy ,TN1-997 - Abstract
In this work, the influence of Mn and Ca doping on the microstructure and mechanical properties of Mg–3Zn, Mg–3Zn-0.5Mn, and Mg–3Zn-0.5Mn-1.2Ca alloys is systematically investigated. The addition of Mn elements is shown to exert no obvious effect on the microstructure of as-cast, as-homogenized, and extruded Mg–3Zn alloys. In contrast, the introduction of Ca into the extruded Mg–3Zn-0.5Mn alloy promotes the formation of nano-sized compounds and enhances grain refinement compared to the other two alloys. The extruded Mg–3Zn-0.5Mn alloy exhibits the higher yield strength (YS, 155 MPa) and ultimate tensile strength (UTS, 183 MPa) but the lower elongation (13%) than the extruded Mg–3Zn alloy (YS of 130 MPa, UTS of 175 MPa, and elongation of 25%). The improved strength of the extruded Mg–3Zn-0.5Mn alloy is mainly attributed to the refined grains, while both the lack of twinning deformation and strong texture result in ductility loss. The most optimal combination of strength and ductility is achieved in an extruded Mg–3Zn-0.5Mn-1.2Ca alloy (YS of 180 MPa, UTS of 250 MPa, and elongation of 26%). This suggests that fine grains and high volume fraction of nano-sized MgZn2 compounds contribute mainly to the strength of Mg–3Zn-0.5Mn-1.2Ca alloy. Although the grain refinement also facilitates the suppression of twinning in the extruded Mg–3Zn-0.5Mn-1.2Ca alloy, the weak texture and fine homogeneous grains are conducive to the high ductility.
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- 2024
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10. MiR-200b-3p elevates 5-FU sensitivity in cholangiocarcinoma cells via autophagy inhibition by targeting KLF4
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Feng Peng, Ruizhi He, Yuhui Liu, Yu Xie, Guangbing Xiong, Xu Li, Min Wang, Chunle Zhao, Hang Zhang, Simiao Xu, and Renyi Qin
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miR-200b-3p ,Autophagy ,KLF4 ,Chemosensitivity ,Cholangiocarcinoma ,Genetics ,QH426-470 - Abstract
Cholangiocarcinoma is one of the most lethal human cancers, and chemotherapy failure is a major cause of recurrence and poor prognosis. We previously demonstrated that miR-200 family members are downregulated in clinical samples of cholangiocarcinoma and inhibit cholangiocarcinoma tumorigenesis and metastasis. However, the role of differentially expressed miR-200b-3p in 5-fluorouracil chemosensitivity remains unclear. Here, we examined how miR-200b-3p modulates 5-fluorouracil chemosensitivity in cholangiocarcinoma. We observed that miR-200b-3p was associated with 5-fluorouracil sensitivity in cholangiocarcinoma and increased 5-fluorouracil-induced mitochondrial apoptosis in cholangiocarcinoma cells. Mechanistically, miR-200b-3p suppressed autophagy in cholangiocarcinoma cells to mediate 5-fluorouracil sensitivity. Further, we identified KLF4 as an essential target of miR-200b-3p in cholangiocarcinoma. Notably, the miR-200b-3p/KLF4/autophagy pathway augmented the chemosensitivity of cholangiocarcinoma cells to 5-fluorouracil. Our findings underscore the key role of miR-200b-3p in chemosensitivity to 5-fluorouracil and highlight the miR-200b-3p/KLF4/autophagy axis as a potential therapeutic target for cholangiocarcinoma.
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- 2024
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11. Characteristics of borehole surface deformation and fracture evolution in progressively demaged coal samples containing double circular boreholes
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Hang ZHANG, Tianjun ZHANG, Xiang JI, Bing JI, Bingnan JI, Mingkun PANG, and Hongyu PAN
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progressive damage ,fracture evolution ,pore circumferential displacement ,fracture tension misalignment ,strain energy evolution ,Geology ,QE1-996.5 ,Mining engineering. Metallurgy ,TN1-997 - Abstract
The coordinated arrangement of gas pre-drainage boreholes and anti-impact and pressure relief boreholes can integrate the prevention and control of mine rock burst and gas compound disasters. However, the dense arrangement of these boreholes may lead to the occurrence of phenomena such as string holes and collapse holes, which could potentially impact the efficiency of mine gas extraction. To investigate the deformation around borehole surface and the evolution of fractures during the compression failure process in the coal and rock masses with dual borehole structure, the 3D-DIC observation experiment was conducted on the coal samples containing double circular holes under uniaxial compression conditions using a digital image observation system for coal rock deformation and failure. This experiment yielded some time-series images of sample surface deformation under various stress states. The three-dimensional full-field deformation of the sample surface was calculated using the three-dimensional surface reconstruction technology and VIC3D analysis processing software. Based on the results of strain field analysis, the stress-strain curve was divided into five deformation stages using statistical index analysis methods, providing a detailed description of the deformation and fracture evolution characteristics around the borehole surface. The results show that under uniaxial compression, the grayscale of strain field in the coal samples with double circular holes shifts toward higher gray levels. The proportion of peaks in the strain field gray histogram changes slowly at first and then rapidly, with the peak stress serving as the boundary. The radial displacement curve around the sample holes presents a “从” shape, while the circumferential displacement curve presents a “人” shape. The left hole H1 always accelerates counterclockwise, while the right hole H2 always accelerates clockwise. The fractures around the holes are primarily characterized by counterclockwise dislocation, accompanied by a few instances of clockwise dislocation. The outer zone of strain localization primarily exhibits energy accumulation before the loading peak and energy release after the loading peak. This is accompanied by energy accumulation resulting from partial energy adjustment and transfer. During the loading process of the specimen, the factors such as the stress field environment, the geometry of fracture end, and the length of fracture undergo constant changes. This results in a reduction in the stress intensity factor KⅠ at the tip of the fracture, thereby impeding the expansion of the fracture.
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- 2024
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12. Blockchain-based proxy re-encryption access control method for biological risk privacy protection of agricultural products
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Shaohua Wang, Na Luo, Bin Xing, Zhenzhen Sun, Hang Zhang, and Chuanheng Sun
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Agricultural products biological risk factors ,Privacy protection ,Blockchain ,Re-encryption ,Attribute based access control ,Medicine ,Science - Abstract
Abstract In today’s globalized agricultural system, information leakage of agricultural biological risk factors can lead to business risks and public panic, jeopardizing corporate reputation. To solve the above problems, this study constructs a blockchain network for agricultural product biological risk traceability based on agricultural product biological risk factor data to achieve traceability of biological risk traceability data of agricultural product supply chain to meet the sustainability challenges. To guarantee the secure and flexible sharing of agricultural product biological risk privacy information and limit the scope of privacy information dissemination, the blockchain-based proxy re-encryption access control method (BBPR-AC) is designed. Aiming at the problems of proxy re-encryption technology, such as the third-party agent being prone to evil, the authorization judgment being cumbersome, and the authorization process not automated, we design the proxy re-encryption access control mechanism based on the traceability of agricultural products’ biological risk factors. Designing an attribute-based access control (ABAC) mechanism based on the traceability blockchain for agricultural products involves defining the attributes of each link in the agricultural supply chain, formulating policies, and evaluating and executing these policies, deployed in the blockchain system in the form of smart contracts. This approach achieves decentralization of authorization and automation of authority judgment. By analyzing the data characteristics within the agricultural product supply chain to avoid the malicious behavior of third-party agents, the decentralized blockchain system acts as a trusted third-party agent, and the proxy re-encryption is combined with symmetric encryption to improve the encryption efficiency. This ensures a efficient encryption process, making the system safe, transparent, and efficient. Finally, a prototype blockchain system for traceability of agricultural biological risk factors is built based on Hyperledger Fabric to verify this research method’s reliability, security, and efficiency. The experimental results show that this research scheme’s initial encryption, re-encryption, and decryption sessions exhibit lower computational overheads than traditional encryption methods. When the number of policies and the number of requests in the access control session is 100, the policy query latency is less than 400 ms, the request-response latency is slightly more than 360ms, and the data uploading throughput is 48.7 tx/s. The data query throughput is 81.8 tx/s, the system performance consumption is low and can meet the biological risk privacy protection needs of the agricultural supply chain. The BBPR-AC method proposed in this study provides ideas for achieving refined traceability management in the agricultural supply chain and promoting digital transformation in the agricultural industry.
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- 2024
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13. Treatment of secondary uterine malignancy following radiotherapy for cervical cancer: a study based on the SEER database
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Xiaojing Tong, Yunyun Xiao, Haozhen Li, Hang Zhang, and Jiawen Li
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Radiotherapy ,Second uterine malignancy ,Treatment ,Cervical cancer ,SEER database ,Gynecology and obstetrics ,RG1-991 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Radiotherapy is one of the main treatments for cervical cancer. Long-term complications of radiation exposure include the emergence of secondary tumors. This is a retrospective study based on an American population. We discuss the optimal treatment modality for patients with radiation-induced secondary uterine malignancy based on the Surveillance, Epidemiology, and End Results database. Methods The study included patients with a definitive pathological diagnosis of cervical cancer who were diagnosed with a uterine malignant tumor ≥ 1 year later. Patients in whom cervical cancer was not the first tumor or patients with missing data were excluded. Univariate and multivariate analyses were performed using the COX regression model to screen independent prognostic factors affecting overall survival. Kaplan-Meier survival curves were analyzed using the R software package. Results We screened 142 patients with a secondary uterine malignancy after cervical cancer treatment, 115 patients with a secondary uterine malignancy after radiotherapy, and 27 patients with a secondary uterine malignancy who did not receive radiotherapy. The average latency period for developing a secondary tumor was 8 years, and 57.04% of the patients had a second tumor at ≥ 60 years of age. In patients with a secondary uterine malignancy after radiotherapy, surgery improved the prognosis [hazard ratio (HR), 0.374; 95% confidence interval (CI), 0.229–0.612], whereas radiotherapy and chemotherapy did not reduce the risk of death. In the subgroup analysis, the surgery plus chemotherapy group had a significantly better survival prognosis than the other groups (HR, 0.251; 95% CI, 0.122–0.515). Conclusions The results suggest that the treatment modality in patients with secondary uterine malignancy after radiotherapy for cervical cancer has a significant impact on survival. The survival outcomes of patients receiving surgery combined with chemotherapy are superior to those of patients receiving other treatments.
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- 2024
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14. Sharp-peaked lanthanide nanocrystals for near-infrared photoacoustic multiplexed differential imaging
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Kang Yong Loh, Lei S. Li, Jingyue Fan, Yi Yiing Goh, Weng Heng Liew, Samuel Davis, Yide Zhang, Kai Li, Jie Liu, Liangliang Liang, Minjun Feng, Ming Yang, Hang Zhang, Ping’an Ma, Guangxue Feng, Zhao Mu, Weibo Gao, Tze Chien Sum, Bin Liu, Jun Lin, Kui Yao, Lihong V. Wang, and Xiaogang Liu
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Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
Abstract Photoacoustic tomography offers a powerful tool to visualize biologically relevant molecules and understand processes within living systems at high resolution in deep tissue, facilitated by the conversion of incident photons into low-scattering acoustic waves through non-radiative relaxation. Although current endogenous and exogenous photoacoustic contrast agents effectively enable molecular imaging within deep tissues, their broad absorption spectra in the visible to near-infrared (NIR) range limit photoacoustic multiplexed imaging. Here, we exploit the distinct ultrasharp NIR absorption peaks of lanthanides to engineer a series of NIR photoacoustic nanocrystals. This engineering involves precise host and dopant material composition, yielding nanocrystals with sharply peaked photoacoustic absorption spectra (~3.2 nm width) and a ~10-fold enhancement in NIR optical absorption for efficient deep tissue imaging. By combining photoacoustic tomography with these engineered nanocrystals, we demonstrate photoacoustic multiplexed differential imaging with substantially decreased background signals and enhanced precision and contrast.
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- 2024
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15. Tree-based ensemble machine learning models in the prediction of acute respiratory distress syndrome following cardiac surgery: a multicenter cohort study
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Hang Zhang, Dewei Qian, Xiaomiao Zhang, Peize Meng, Weiran Huang, Tongtong Gu, Yongliang Fan, Yi Zhang, Yuchen Wang, Min Yu, Zhongxiang Yuan, Xin Chen, Qingnan Zhao, and Zheng Ruan
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Acute respiratory distress syndrome ,Cardiac surgery ,Machine learning ,Prediction model ,SHAP value ,Medicine - Abstract
Abstract Background Acute respiratory distress syndrome (ARDS) after cardiac surgery is a severe respiratory complication with high mortality and morbidity. Traditional clinical approaches may lead to under recognition of this heterogeneous syndrome, potentially resulting in diagnosis delay. This study aims to develop and external validate seven machine learning (ML) models, trained on electronic health records data, for predicting ARDS after cardiac surgery. Methods This multicenter, observational cohort study included patients who underwent cardiac surgery in the training and testing cohorts (data from Nanjing First Hospital), as well as those patients who had cardiac surgery in a validation cohort (data from Shanghai General Hospital). The number of important features was determined using the sliding windows sequential forward feature selection method (SWSFS). We developed a set of tree-based ML models, including Decision Tree, GBDT, AdaBoost, XGBoost, LightGBM, Random Forest, and Deep Forest. Model performance was evaluated using the area under the receiver operating characteristic curve (AUC) and Brier score. The SHapley Additive exPlanation (SHAP) techinque was employed to interpret the ML model. Furthermore, a comparison was made between the ML models and traditional scoring systems. ARDS is defined according to the Berlin definition. Results A total of 1996 patients who had cardiac surgery were included in the study. The top five important features identified by the SWSFS were chronic obstructive pulmonary disease, preoperative albumin, central venous pressure_T4, cardiopulmonary bypass time, and left ventricular ejection fraction. Among the seven ML models, Deep Forest demonstrated the best performance, with an AUC of 0.882 and a Brier score of 0.809 in the validation cohort. Notably, the SHAP values effectively illustrated the contribution of the 13 features attributed to the model output and the individual feature's effect on model prediction. In addition, the ensemble ML models demonstrated better performance than the other six traditional scoring systems. Conclusions Our study identified 13 important features and provided multiple ML models to enhance the risk stratification for ARDS after cardiac surgery. Using these predictors and ML models might provide a basis for early diagnostic and preventive strategies in the perioperative management of ARDS patients.
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- 2024
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16. Bruton’s tyrosine kinase inhibition ameliorated neuroinflammation during chronic white matter ischemia
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Lu-Lu Xu, Sheng Yang, Luo-Qi Zhou, Yun-Hui Chu, Xiao-Wei Pang, Yun-Fan You, Hang Zhang, Lu-Yang Zhang, Li-Fang Zhu, Lian Chen, Ke Shang, Jun Xiao, Wei Wang, Dai-Shi Tian, and Chuan Qin
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Chronic cerebral hypoperfusion ,Tolebrutinib ,Microglia ,Inflammation ,Ferroptosis ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Abstract Chronic cerebral hypoperfusion (CCH), a disease afflicting numerous individuals worldwide, is a primary cause of cognitive deficits, the pathogenesis of which remains poorly understood. Bruton’s tyrosine kinase inhibition (BTKi) is considered a promising strategy to regulate inflammatory responses within the brain, a crucial process that is assumed to drive ischemic demyelination progression. However, the potential role of BTKi in CCH has not been investigated so far. In the present study, we elucidated potential therapeutic roles of BTK in both in vitro hypoxia and in vivo ischemic demyelination model. We found that cerebral hypoperfusion induced white matter injury, cognitive impairments, microglial BTK activation, along with a series of microglia responses associated with inflammation, oxidative stress, mitochondrial dysfunction, and ferroptosis. Tolebrutinib treatment suppressed both the activation of microglia and microglial BTK expression. Meanwhile, microglia-related inflammation and ferroptosis processes were attenuated evidently, contributing to lower levels of disease severity. Taken together, BTKi ameliorated white matter injury and cognitive impairments induced by CCH, possibly via skewing microglia polarization towards anti-inflammatory and homeostatic phenotypes, as well as decreasing microglial oxidative stress damage and ferroptosis, which exhibits promising therapeutic potential in chronic cerebral hypoperfusion-induced demyelination.
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- 2024
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17. Hysteresis mechanism of supercritical CO2 desorption in coal and its implication for carbon geo-sequestration
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Cao LIU, Jiangwei YAN, Chunhui ZHAO, Fuping ZHONG, Tianrang JIA, Xiaolei LIU, and Hang ZHANG
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co2 geo-sequestration ,supercritical co2 ,desorption hysteresis ,residual trapping ,capillary pressure ,quantitative model for carbon geo-sequestration ,Geology ,QE1-996.5 ,Mining engineering. Metallurgy ,TN1-997 - Abstract
Sequestration of CO2 in the unmineable coal seams is not only one of the most ideal options for reducing greenhouse gas effects, but also the only way for the coal industry to reduce CO2 emissions and achieve low carbonization sustainable development. However, the key unresolved issues regarding the CO2 geo-sequestration in coal seams is: “how long does CO2 injected into a coal seam remain in the seam?”. In this regard, on the basis of clarifying the hysteresis law of CO2 desorption in coals, this paper reveals the mechanism of supercritical CO2 desorption hysteresis, establishes a quantitative model for the geological storage of CO2, and explores the use of desorption hysteresis to achieve a long-term safe storage of CO2 in coal seams. The study results shows that the degree of desorption hysteresis of supercritical CO2 in coal is greater than that of subcritical CO2, and a stable hysteresis characteristic similar to a “parallel line” in the supercritical phase is formed between the adsorption and desorption isotherm. The fundamental reason for the desorption hysteresis is that the micro and nano sized pores in coal form curved surfaces due to their hydrophilicity, which generate strong capillary pressure following the Laplace’s equation, absorb liquid water, truncate and fix the supercritical CO2 fluid, and ultimately form CO2 residual trapping. For example, the cylindrical inorganic pores with a diameter of 40–10 nm in coal can generate a capillary pressure of 7.30–29.12 MPa, which is sufficient to block supercritical CO2. Taking the desorption isotherm of Jiulishan coal as an example, using the quantitative model for the geological storage of CO2 established in this study, it has been estimated that the total trapping capacity of the No.21 coal seam at depths of 900–1 500 m is stable at 35–37 m3/t. Among them, the adsorption trapping capacity accounts for about 80%, residual trapping capacity accounts for about 15%, and structural trapping capacity only accounts for 5%. Desorption hysteresis suggests that some measures should be taken to increase the proportion of CO2 residual trapping in coal seams as much as possible, the reason is that the residual CO2 sealed by capillary blockage is safer and has no risk of leakage compared to the free and adsorbed CO2 sealed by surrounding rock. The physical parameters such as ash content, moisture content, pore size, and morphology of coal seams are the main factors affecting the residual trapping efficiency.
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- 2024
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18. A new method of magnetic pulse welding of dissimilar metal plates using a uniform pressure electromagnetic actuator based on pre-deformation
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Hang Zhang, Hongfa Ding, Xiaoxiang Li, and Quanliang Cao
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Magnetic pulse welding ,Uniform pressure electromagnetic actuator ,Pre-deformation ,Welding quality ,Wavy composite interface ,Medicine ,Science - Abstract
Abstract The magnetic pulse welding method using a uniform pressure electromagnetic actuator can effectively weld dissimilar metal plates. However, the existing uniform pressure welding method leads to serious thinning of the plate at the chamfer, lack of welding at the center, and bulging of the welded sample, which seriously affects the quality of the welded joint. To solve these problems and improve the quality of welded joints, a new uniform pressure welding method of dissimilar metal plates based on pre-deformation was developed in this work. In this study, using the welding of an AA1060 aluminum plate and an SS304 steel plate with a thickness of 1 mm as an example, it was confirmed through numerical simulation and experimental research that the pre-deformation of the flyer plate controlled the impact angle of the central area of the plate, and it effectively suppressed central non-welding and serious bulge issues. Further, the welding method also reduced the height of the cushion blocks on both sides, thus mitigating aluminum plate thinning at the chamfer, ultimately improving the tensile strength of the joint. Additionally, a microscopic observation showed that the welding interface formed a wavy composite interface, and the connection strength was good. This welding method can also be extended to welding other dissimilar metal plates.
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- 2024
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19. Unidirectional guided-wave-driven metasurfaces for arbitrary wavefront control
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Shiqing Li, Kosmas L. Tsakmakidis, Tao Jiang, Qian Shen, Hang Zhang, Jinhua Yan, Shulin Sun, and Linfang Shen
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Science - Abstract
Abstract Metasurfaces are capable of fully reshaping the wavefronts of incident beams in desired manners. However, the requirement for external light excitation and the resonant nature of their meta-atoms, make challenging their on-chip integration. Here, we introduce the concept and design of a fresh class of metasurfaces, driven by unidirectional guided waves, capable of arbitrary wavefront control based on the unique dispersion properties of unidirectional guided waves rather than resonant meta-atoms. Upon experimentally demonstrating the feasibility of our designs in the microwave regime, we numerically validate the introduced principle through the design of several microwave meta-devices using metal-air-gyromagnetic unidirectional surface magneto-plasmons, agilely converting unidirectional guided modes into the wavefronts of 3D Bessel beams, focused waves, and controllable vortex beams. We, further, numerically demonstrate sub-diffraction focusing, which is beyond the capability of conventional metasurfaces. Our unfamiliar yet practical designs may enable full, broadband manipulation of electromagnetic waves on deep subwavelength scales.
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- 2024
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20. A nomogram for predicting hemorrhagic shock in pediatric patients with multiple trauma
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Nan Lin, Jingyi Jin, Sisi Yang, Xiaohui Zhong, Hang Zhang, Yichao Ren, Linhua Tan, Hongzhen Xu, Daqing Ma, Jinfa Tou, Qiang Shu, and Dengming Lai
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Pediatric ,Multiple trauma ,Hemorrhagic shock ,Prediction nomogram ,Medicine ,Science - Abstract
Abstract The timely detection and management of hemorrhagic shock hold paramount importance in clinical practice. This study was designed to establish a nomogram that may facilitate early identification of hemorrhagic shock in pediatric patients with multiple-trauma. A retrospective study was conducted utilizing a cohort comprising 325 pediatric patients diagnosed with multiple-trauma, who received treatment at the Children's Hospital, Zhejiang University School of Medicine, Zhejiang, China. For external validation, an additional cohort of 144 patients from a children's hospital in Taizhou was included. The model's predictor selection was optimized through the application of the Least Absolute Shrinkage and Selection Operator (LASSO) regression. Subsequently, a prediction nomogram was constructed using multivariable logistic regression analysis. The performance and clinical utility of the developed model were comprehensively assessed utilizing various statistical metrics, including Harrell's Concordance Index (C-index), receiver operating characteristic (ROC) curve analysis, calibration curve analysis, and decision curve analysis (DCA). Multivariate logistic regression analysis identified systolic blood pressure (ΔSBP), platelet count, activated partial thromboplastin time (APTT), and injury severity score (ISS) as independent predictors for hemorrhagic shock. The nomogram constructed using these predictors demonstrated robust predictive capabilities, as evidenced by an impressive area under the curve (AUC) value of 0.963. The model's goodness-of-fit was assessed using the Hosmer–Lemeshow test (χ2 = 10.023, P = 0.209). Furthermore, decision curve analysis revealed significantly improved net benefits with the model. External validation further confirmed the reliability of the proposed predictive nomogram. This study successfully developed a nomogram for predicting the occurrence of hemorrhagic shock in pediatric patients with multiple trauma. This nomogram may serve as an accurate and effective tool for timely and efficient management of children with multiple trauma.
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- 2024
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21. Thymoquinone as an electron transfer mediator to convert Type II photosensitizers to Type I photosensitizers
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Jiahao Zhuang, Guobin Qi, Yecheng Feng, Min Wu, Hang Zhang, Dandan Wang, Xianhe Zhang, Kok Chan Chong, Bowen Li, Shitai Liu, Jianwu Tian, Yi Shan, Duo Mao, and Bin Liu
- Subjects
Science - Abstract
Abstract The development of Type I photosensitizers (PSs) is of great importance due to the inherent hypoxic intolerance of photodynamic therapy (PDT) in the hypoxic microenvironment. Compared to Type II PSs, Type I PSs are less reported due to the absence of a general molecular design strategy. Herein, we report that the combination of typical Type II PS and natural substrate carvacrol (CA) can significantly facilitate the Type I pathway to efficiently generate superoxide radical (O2 –•). Detailed mechanism study suggests that CA is activated into thymoquinone (TQ) by local singlet oxygen generated from the PS upon light irradiation. With TQ as an efficient electron transfer mediator, it promotes the conversion of O2 to O2 –• by PS via electron transfer-based Type I pathway. Notably, three classical Type II PSs are employed to demonstrate the universality of the proposed approach. The Type I PDT against S. aureus has been demonstrated under hypoxic conditions in vitro. Furthermore, this coupled photodynamic agent exhibits significant bactericidal activity with an antibacterial rate of 99.6% for the bacterial-infection female mice in the in vivo experiments. Here, we show a simple, effective, and universal method to endow traditional Type II PSs with hypoxic tolerance.
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- 2024
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22. Anomalous Polarons in Two‐Dimensional Organometallic Perovskite Ferroelectric
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Junhong Yu, Yadong Han, Yunfan Yang, Hang Zhang, Yi Liu, Jinlong Xu, Zhihua Sun, and Jianbo Hu
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macroscopic polarizations ,perovskite ferroelectric ,photophysics ,polarons ,transient absorptions ,Science - Abstract
Abstract The concept of ferroelectric polarons is proposed to partially explain the exceptional optoelectronic properties observed in lead halide perovskites (LHPs). It is intriguing but unclear how this proposal, which involves local or transient polarizations, applies in general to 2D LHPs with long‐range ferroelectricity. Here, this work presents a pioneering time‐domain experimental investigation of polarons in ferroelectric (IA)2(MA)2Pb3Br10 (IMPB; IA is isoamylammonium and MA is methylammonium) using transient absorption spectroscopy. Compared to non‐ferroelectric LHPs, IMPB exhibits several distinct polaronic properties closely associated with macroscopic polarizations of ferroelectricity, including a prolonged polaron formation time (≈1.1 ps), a Stark splitting of the bleaching (≈63 meV), and a giant polaron Mott density (≈7.6 × 1018 cm−3). These findings broaden the realm of 2D polaron systems and reveal the decisive role of static/unidirectional polarizations on polaron physics in 2D LHPs.
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- 2024
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23. Amentoflavone for treating cardiocerebrovascular diseases and neurological disorders
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Hang Zhang, Yin-mei Ban, De-mei Li, Gang Wang, Juan Gu, and Lei Zhu
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amentoflavone ,cardiovascular diseases ,cerebrovascular diseases ,neurological diseases ,pharmacological effects ,anti-inflammatory agents ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Amentoflavone (AME) is a flavonoid compound found in over 120 plants. Its extensive pharmacological activity for treating cardiocerebrovascular diseases and neurological disorders have attracted the attention of researchers in recent years. However, owing to the poor solubility and low bioavailability of AME, it has not been developed as a drug for treating these diseases. This review focuses on two aspects of AME: First, it provides a detailed summary and introduction to AME based on its chemical structure, physicochemical properties, plant sources, extraction and purification methods, administration systems, and pharmacokinetic properties. Second, it summarizes the effects of AME on cardiocerebrovascular diseases and neurological disorders, and its specific pharmacological mechanisms. This review aims to promote the use of AME for treating cardiocerebrovascular diseases and neurological disorders. AME exhibits multiple activities, indicating its potential as a natural drug for treating these diseases. Further studies on its pharmacokinetics and toxicology are required to ensure its safety and efficacy.
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- 2024
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24. Evaluating the Sensitivity of Wearable Devices in Posttranscatheter Aortic Valve Implantation Functional Assessment
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Jinghui An, Fengwu Shi, Huajun Wang, Hang Zhang, and Su Liu
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Information technology ,T58.5-58.64 ,Public aspects of medicine ,RA1-1270 - Published
- 2024
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25. Clarifying the Impact of Electrode Material Heterogeneity on the Thermal Runaway Characteristics of Lithium‐Ion Batteries
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Chenran Du, Kun Yan, Xueling Shen, Yi Cui, Xiaobing Li, Jingjing Li, Ran Xu, Xiaoli Ma, Qian Huang, Yanyan Fang, and Hang Zhang
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heterogeneous microstructures ,lithium‐ion batteries ,multiphysics models ,thermal runaways ,Environmental technology. Sanitary engineering ,TD1-1066 ,Renewable energy sources ,TJ807-830 - Abstract
The safety and efficiency of lithium‐ion batteries (LIBs) suggest a promising future for this technology, particularly in the automobile industry. However, thermal runaway—wherein a LIB undergoes an uncontrollable increase in temperature that may result in smoke, fire, or explosion—represents an important and widely studied failure type. Since the electrodes of LIBs are manufactured from porous composite materials, their heterogeneity can significantly influence the effective material characteristics and microscale behaviors of LIBs during operation. Microstructure geometric and electrochemical–thermal models are typically used to investigate these impacts. Herein, a microstructure geometric model is constructed of LIB's electrodes. A virtual multiphysics model is used to simulate the overcharging thermal runaway condition. The model's accuracy is validated through real‐world experiments. The model shows greater accuracy compared to the result from a conventional homogeneous geometric model and better reflects the heterogeneous internal phenomenon. The model is applied to a variable analysis in order to investigate how the varying heterogeneity of the cathode's porosity impacts the cell during overcharging thermal runaway behavior. Our results indicate that decreasing porosity heterogeneity at the cathode may delay thermal runaway, owing to the heterogeneous impact on particle diffusion behaviors and the side reaction rate.
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- 2024
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26. Advanced characterization techniques for phosphate cathodes in aqueous rechargeable zinc‐based batteries
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Li‐Feng Zhou, Jia‐Yang Li, Jian Peng, Li‐Ying Liu, Hang Zhang, Yi‐Song Wang, Yameng Fan, Jia‐Zhao Wang, and Tao Du
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advanced characterization techniques ,aqueous zinc‐ion battery ,cathodes ,mechanism ,phosphates ,Production of electric energy or power. Powerplants. Central stations ,TK1001-1841 - Abstract
Abstract Aqueous zinc‐based batteries are emerging as highly promising alternatives to commercially successful lithium‐ion batteries, particularly for large‐scale energy storage in power stations. Phosphate cathodes have garnered significant research interest owing to their adjustable operation potential, electrochemical stability, high theoretical capacity, and environmental robustness. However, their application is impeded by various challenges, and research progress is hindered by unclear mechanisms. In this review, the various categories of phosphate materials as zinc‐based battery cathodes are first summarized according to their structure and their corresponding electrochemical performance. Then, the current advances to reveal the Zn2+ storage mechanisms in phosphate cathodes by using advanced characterization techniques are discussed. Finally, some critical perspectives on the characterization techniques used in zinc‐based batteries and the application potential of phosphates are provided. This review aims to guide researchers toward advanced characterization technologies that can address key challenges, thereby accelerating the practical application of phosphate cathodes in zinc‐based batteries for large‐scale energy storage.
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- 2024
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27. Virological characteristics of SARS-CoV-2 Omicron BA.5.2.48
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Wenqi Wang, Qiushi Jin, Ruixue Liu, Wentao Zeng, Pengfei Zhu, Tingting Li, Tiecheng Wang, Haiyang Xiang, Hang Zhang, Qin Chen, Yun Gao, Yana Lai, Fang Yan, Xianzhu Xia, Jianmin Li, Xuefeng Wang, and Yuwei Gao
- Subjects
SARS-CoV-2 ,Omicron ,BA.5 ,spike ,pathogenicity ,animal models ,Immunologic diseases. Allergy ,RC581-607 - Abstract
With the prevalence of sequentially-emerged sublineages including BA.1, BA.2 and BA.5, SARS-CoV-2 Omicron infection has transformed into a regional epidemic disease. As a sublineage of BA.5, the BA.5.2.48 outbroke and evolved into multi-subvariants in China without clearly established virological characteristics. Here, we evaluated the virological characteristics of two isolates of the prevalent BA.5.2.48 subvariant, DY.2 and DY.1.1 (a subvariant of DY.1). Compared to the normal BA.5 spike, the double-mutated DY.1.1 spike demonstrates efficient cleavage, reduced fusogenicity and higher hACE2 binding affinity. BA.5.2.48 demonstrated enhanced airborne transmission capacity than BA.2 in hamsters. The pathogenicity of BA.5.2.48 is greater than BA.2, as revealed in Omicron-lethal H11-K18-hACE2 rodents. In both naïve and convalescent hamsters, DY.1.1 shows stronger fitness than DY.2 in hamster turbinates. Thus regional outbreaking of BA.5.2.48 promotes the multidirectional evolution of its subvariants, gaining either enhanced pathogenicity or a fitness in upper airways which is associated with higher transmission.
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- 2024
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28. Developing an annual global Sub-National scale economic data from 1992 to 2021 using nighttime lights and deep learning
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Hang Zhang, Guanpeng Dong, Bing Li, Zunyi Xie, Changhong Miao, Fan Yang, Yang Gao, Xiaoyu Meng, Dongyang Yang, Yong Liu, Hongjuan Zhang, Leying Wu, Fanglin Shi, Yulong Chen, Wenjie Wu, Edyta Laszkiewicz, Yutian Liang, Binbin Lu, Jing Yao, and Xuecao Li
- Subjects
GDP per capita ,Economic assessment ,Nighttime lights ,Multi-layer perceptron ,Spatial spillover ,Scale effects ,Physical geography ,GB3-5030 ,Environmental sciences ,GE1-350 - Abstract
The Gross Domestic Product (GDP) per capita is one of the most widely used socioeconomic indicators, serving as an integral component for climate change impact analysis. However, a national scale assessment may induce considerable bias because it conceals any internal variations within a country. The lack of a long-term sub-national scale GDP data is a substantive hinderance. Leveraging the close relationship between nighttime lights and GDP, we address this gap by developing a novel methodological framework in two steps. First, under the modeling philosophy of spatial statistics, we developed a novel approach based on deep and machine learning techniques to establish a complex mapping between two inconsistent nighttime lights (NTL) datasets: the Defense Meteorological Satellite Program’s Operational Linescan System (DMSP) and the National Polar-Orbiting Partnership’s Visible Infrared Imaging Radiometer Suite (VIIRS). The models achieve accuracies ranging from 0.945 to 0.980 (correlation coefficients). By taking the estimations ensemble of the two techniques, the time series of DMSP data was extended to 2021. Next, a novel modeling strategy based on multi-layer perceptron was developed to derive the non-linear relationship between NTL and GDP per capita at sub-national scale to alleviate scale effects at this granularity, while explicitly capturing regional heterogeneity effect. The trained models achieve average accuracies of 0.967, 0.959, and 0.959 on the training, validation, and test sets, respectively. We evaluate the developed dataset at the global, national, and sub-national scales from various perspective, and the results offer solid evidence on the reliability of the estimated economic data. By linking to historical global climate change data, we quantify global economic losses attributed to extreme heat to demonstrate how the estimated GDP data can be useful in the climate change impact analysis.
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- 2024
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29. Pannexins in the musculoskeletal system: new targets for development and disease progression
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Yan Luo, Shengyuan Zheng, Wenfeng Xiao, Hang Zhang, and Yusheng Li
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Biology (General) ,QH301-705.5 ,Physiology ,QP1-981 - Abstract
Abstract During cell differentiation, growth, and development, cells can respond to extracellular stimuli through communication channels. Pannexin (Panx) family and connexin (Cx) family are two important types of channel-forming proteins. Panx family contains three members (Panx1-3) and is expressed widely in bone, cartilage and muscle. Although there is no sequence homology between Panx family and Cx family, they exhibit similar configurations and functions. Similar to Cxs, the key roles of Panxs in the maintenance of physiological functions of the musculoskeletal system and disease progression were gradually revealed later. Here, we seek to elucidate the structure of Panxs and their roles in regulating processes such as osteogenesis, chondrogenesis, and muscle growth. We also focus on the comparison between Cx and Panx. As a new key target, Panxs expression imbalance and dysfunction in muscle and the therapeutic potentials of Panxs in joint diseases are also discussed.
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- 2024
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30. Mechanism and deterioration pattern of sandstone surrounding rock voiding at bottom of heavy-haul railway tunnel
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Zi-qiang Li, Shi-jian Yang, Jian-wen Feng, Hang Zhang, Wei-wei Huang, and Zheng Li
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Heavy-haul railway tunnel ,Sandstone surrounding rock ,Voiding mechanism ,Deterioration patterns ,Discrete element method ,Medicine ,Science - Abstract
Abstract This study combines laboratory experiments and discrete element simulation methods to analyze the mechanism and deterioration patterns of sandstone surrounding rock voiding the bottom of a heavy-haul railway tunnel. It is based on previously acquired measurement data from optical fiber grating sensors installed in the Taihangshan Mountain Tunnel of the Wari Railway. By incorporating rock particle wastage rate results, a method for calculating the peak strength and elastic modulus attenuation of surrounding rock is proposed. Research indicates that the operation of heavy-haul trains leads to an instantaneous increase in the dynamic water pressure on the bottom rock ranging 144.4–390.0%, resulting in high-speed water flow eroding the rock. After 1–2 years of operation, the bottom water and soil pressures increase by 526.5% and 390.0%, respectively. Focusing on sandstone surrounding rock with high observability, laboratory experiments were conducted to monitor the degradation stages of infiltration, particle loss, and voiding of rock under the action of dynamic water flow. The impact of water flow on the “cone-shaped” bottom rock deformation was also clarified. The extent of rock deterioration and voiding was determined using miniature water and soil pressure sensors in conjunction with discrete element numerical simulations. The measured rock particle loss was used as a criterion. Finally, a fitting approach is derived to calculate the peak strength and elastic modulus attenuation of surrounding rock, gaining insight into and providing a reference for the maintenance and disposal measures for the bottom operation of heavy-haul railway tunnels.
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- 2024
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31. Seismic geological characteristics and gas reservoir distribution of Changxing Formation biological bio-reef reservoir in the Longhuichang-Tieshan area, northeastern Sichuan Basin, China
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Hu Zhao, Juncheng Yi, Hang Zhang, Rongrong Zhao, Jiewei Zhang, Jingyun Dai, Le Lü, and Hongyi An
- Subjects
Northeastern Sichuan area ,Changxing Formation ,Bio-reef reservoir ,Analysis of gas reservoir relationship ,Gas industry ,TP751-762 - Abstract
This research aims to address the ambiguity surrounding the extent of development of Changxing Formation bio-reef reservoirs in the Longhuichang-Tieshan area of the northeastern Sichuan Basin, China, and to elucidate the relationship between these reservoirs and gas distribution. Utilizing drilling and logging data, this study provides a comprehensive summary of the seismic geological characteristics of bio-reef reservoirs. Furthermore, it investigates the effects of reservoir parameters, structural location, and strike-slip faults on the development of bio-reef gas reservoirs. The research shows that bio-reef reservoirs in the area predominantly manifest vertical development in the middle and upper parts of the Changxing Formation, with horizontal expansion occurring along the platform margin and local highland areas. Notably, potential exploration areas are identified, particularly the western wing of the Longhuichang structure and the southwestern side of the Tieshannan structure. By comparing and analyzing the relationship between bio-reef gas reservoirs in the study area, the study aims to clarify the controlling effects of reservoir parameters, structural location, strike-slip faults, and other pertinent factors on the development of bio-reef gas reservoirs. It is observed that while these factors do not exhibit a clear strong linear relationship, they have a comprehensive effect on the development of gas reservoirs. The enrichment mode and failure mode of favorable gas reservoirs in the study area have been analyzed and established, providing crucial technical support to facilitate further exploration of Changxing Formation bio-reef gas reservoirs in the northeastern Sichuan Basin.
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- 2024
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32. A single-cell atlas of lung homeostasis reveals dynamic changes during development and aging
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Hao Jia, Yuan Chang, Yulin Chen, Xiao Chen, Hang Zhang, Xiumeng Hua, Mengda Xu, Yixuan Sheng, Ningning Zhang, Hao Cui, Lei Han, Jian Zhang, Xiaodong Fu, and Jiangping Song
- Subjects
Biology (General) ,QH301-705.5 - Abstract
Abstract Aging is a global challenge, marked in the lungs by function decline and structural disorders, which affects the health of the elderly population. To explore anti-aging strategies, we develop a dynamic atlas covering 45 cell types in human lungs, spanning from embryonic development to aging. We aim to apply the discoveries of lung’s development to address aging-related issues. We observe that both epithelial and immune cells undergo a process of acquisition and loss of essential function as they transition from development to aging. During aging, we identify cellular phenotypic alternations that result in reduced pulmonary compliance and compromised immune homeostasis. Furthermore, we find a distinctive expression pattern of the ferritin light chain (FTL) gene, which increases during development but decreases in various types of lung cells during the aging process.
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- 2024
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33. Design of Janus Nanoparticles for Mobility Control in Heterogeneous Reservoirs
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Long Zang, Miaomiao Hu, Jie Cao, Yun Cheng, Pengpeng Li, Jintang Guo, and Hang Zhang
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Chemistry ,QD1-999 - Published
- 2024
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34. Thermodynamic driving forces in contact electrification between polymeric materials
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Hang Zhang, Sankaran Sundaresan, and Michael A. Webb
- Subjects
Science - Abstract
Abstract Contact electrification, or contact charging, refers to the process of static charge accumulation after rubbing, or even simple touching, of two materials. Despite its relevance in static electricity, various natural phenomena, and numerous technologies, contact charging remains poorly understood. For insulating materials, even the species of charge carrier may be unknown, and the direction of charge-transfer lacks firm molecular-level explanation. Here, we use all-atom molecular dynamics simulations to investigate whether thermodynamics can explain contact charging between insulating polymers. Based on prior work suggesting that water-ions, such as hydronium and hydroxide ions, are potential charge carriers, we predict preferred directions of charge-transfer between polymer surfaces according to the free energy of water-ions within water droplets on such surfaces. Broad agreement between our predictions and experimental triboelectric series indicate that thermodynamically driven ion-transfer likely influences contact charging of polymers. Furthermore, simulation analyses reveal how specific interactions of water and water-ions proximate to the polymer-water interface explain observed trends. This study establishes relevance of thermodynamic driving forces in contact charging of insulators with new evidence informed by molecular-level interactions. These insights have direct implications for future mechanistic studies and applications of contact charging involving polymeric materials.
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- 2024
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35. Failure Behavior and Fracture Evolution Mechanism of Coal with Fissures around Holes
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Zehua Wang and Hang Zhang
- Subjects
Chemistry ,QD1-999 - Published
- 2024
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36. PRKCB methylation: a potential biomarker of MDD with childhood chronic stress, a cross-sectional study in drug-naive, first-episode adolescent MDD
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Yuanmei Tao, Meijiang Jin, Hang Zhang, Maojia Ran, Hanmei Xu, Shoukang Zou, Fang Deng, Lijuan Huang, Hong Zhang, Xiaolan Wang, Yanping Wang, Huijin Hou, Shufang Liang, Xiaohong Ma, and Li Yin
- Subjects
Adolescent MDD ,childhood chronic stress ,PRKCB ,DNA methylation ,Genetics ,QH426-470 - Abstract
The purpose of this study was to investigate the relationship between childhood chronic stress(CCS), Protein kinase C beta (PRKCB) methylation and adolescent major depressive disorder (MDD). After recruiting 100 adolescents with MDD and 50 healthy controls (HCs), we evaluated the severity of CCS. PRKCB methylation was assessed by pyrosequencing using whole blood-derived DNA. To explore the relationship between CCS, PRKCB and adolescent MDD, we conducted correlation analysis and regression analysis, and constructed multiplicative interaction models and generalized linear models. PRKCB methylation and CCS were both found to be associated with MDD, and CCS was associated with PRKCB methylation. No significant CCS-PRKCB methylation interactions were observed. However, we found the interaction of CCS and MDD on PRKCB methylation. Our results found that PRKCB methylation was influenced by CCS and the disease itself, and PRKCB methylation was significantly positively associated with MDD severity, suggesting that PRKCB methylation may be a potential biomarker for adolescent MDD. This study is a cross-sectional observational study, which cannot draw the conclusion of causality. Prospective cohort studies are needed to further examine the relationship between CCS, adolescent MDD, and PRKCB methylation.
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- 2024
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37. Genetic variation and recombination analysis of PRRSV-2 GP3 gene in China from 1996 to 2023
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Chen Lv, Yajie Zheng, Kexin Liu, Gan Li, Qin Luo, Hang Zhang, Huiyang Sha, Ruining Wang, Weili Kong, and Mengmeng Zhao
- Subjects
PRRSV ,GP3 gene ,genetic variation ,genetic recombination ,phylogeny ,Microbiology ,QR1-502 - Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) has become widespread in China particularly the highly pathogenic porcine reproductive and respiratory syndromes (HP-PRRSV), NADC30, and NADC34 strains, and has posed a threat to the swine industry for over 20 years. To monitor genetic variation in PRRSV-2 GP3 strains in China, we analyzed 618 strains isolated between 1996 to 2023 and constructed phylogenetic trees. Additionally, 60 selected strains were used to analyze nucleotide and amino acid homology. PRRSV GP3 gene exhibited nucleotide identity ranging from 78.2% to 100.0% and amino acid similarity ranging from 74.9% to 99.6%. The GP3 gene in the 60 selected strains consisted of 254 amino acids, and amino acid mutations in the strains primarily occurred in B-cell epitopes, T-cell epitopes, and highly variable regions. The glycosylation sites of the strains used for amino acid sequence comparisons remained unaltered, except for the N29 site in the GD20220303-2022 strain. PRRSV-2 strains in China belong to lineages 1, 3, 5, and 8. Recombination analysis detected two recombination events, involving lineages 1 and 8. In conclusion, this study investigated multiple strains of the PRRSV-2 GP3 gene to explore the prevalence and genetic diversity of the GP3 gene in China from a gene family perspective. The results of the analyses provide a basis for clinical prevention strategies and vaccine development.
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- 2024
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38. miR-19a-3p promotes the growth of hepatocellular carcinoma by regulating p53/SOX4
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Hang Zhang, Jiajun Zhu, Jingjun Zhang, Ying Liu, Baicheng Zhao, Xiaoyi Yang, Wenhan Zhou, Bozhou Chen, Shuangshuang Zhang, Ruotong Huang, and Shuying Chen
- Subjects
Hepatocellular carcinoma ,miR-19a-3p ,p53 ,SOX4 ,Mechanism ,Clinical target ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Objective: This study aims to investigate the potential functions of miR-19a-3p in HCC. Method: We collected serum samples to analyze miR-19a-3p expression. We utilized CCK8 and Transwell assays to access miR-19a-3p′s influence on HCC cells malignancy. We used dual-luciferase reporter and western blotting to validate the impact of p53/miR-19 on miR-19/SOX4. Results: The results demonstrated that miR-19a-3p was highly expressed in pre-operative serum samples and HCC cells, which can promote cell proliferation, migration and invasion in HCC under in vitro conditions. Additionally, there was a p53 binding site on the upstream of miR-19a-3p, which was inhibited by p53. SOX4 was the direct gene targeted by miR-19a-3p. The imbalance of p53-miR-19-SOX4 loop was one reason for the progress of HCC. Conclusion: Our findings validate the mechanisms of miR-19a-3p and highlight its potential as a therapeutic target in HCC.
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- 2024
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39. Colonization of microbiota derived from Macaca fascicularis, Bama miniature pigs, beagle dogs, and C57BL/6J mice alleviates DSS-induced colitis in germ-free mice
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Yapeng Yang, Zeyue Zhang, Yuqing Wang, Junhua Rao, Jing Sun, Zhimin Wu, Jinhui He, Xiang Tan, Lifeng Liang, Qian Yu, Zhifeng Wu, Huicong Zou, Hang Zhang, Miaomiao Dong, Jixia Zheng, Shuaifei Feng, Wei Cheng, and Hong Wei
- Subjects
fecal microbiota transplantation ,inflammatory bowel disease ,metagenome ,effective microbe ,Microbiology ,QR1-502 - Abstract
ABSTRACT Fecal microbiota transplantation (FMT) is an innovative and promising treatment for inflammatory bowel disease (IBD), which is related to the capability of FMT to supply functional microorganisms to improve recipient gut health. Numerous studies have highlighted considerable variability in the efficacy of FMT interventions for IBD. Several factors, including the composition of the donor microorganisms, significantly affect the efficacy of FMT in the treatment of IBD. Consequently, identifying the functional microorganisms in the donor is crucial for enhancing the efficacy of FMT. To explore potential common anti-inflammatory bacteria with therapeutic implications for IBD, germ-free (GF) BALB/c mice were pre-colonized with fecal microbiota obtained from diverse donors, including Macaca fascicularis (MCC_FMT), Bama miniature pigs (BP_FMT), beagle dogs (BD_FMT), and C57BL/6 J mice (Mice_FMT). Subsequently, mice were treated with dextran sodium sulfate (DSS). As expected, the symptoms of colitis were alleviated by MCC_FMT, BP_FMT, BD_FMT, and Mice_FMT, as demonstrated by the prevention of an elevated disease activity index in mice. Additionally, the utilization of distinct donors protected the intestinal barrier and contributed to the regulation of cytokine homeostasis. Metagenomic sequencing data showed that the microbial community structure and dominant species were significantly different among the four groups, which may be linked to variations in the anti-inflammatory efficacy observed in the respective groups. Notably, Lactobacillus reuteri and Flavonifractor plautii were consistently present in all four groups. L. reuteri exhibited a significant negative correlation with IL-1β, and animal studies further confirmed its efficacy in alleviating IBD, suggesting the presence of common functional bacteria across different donors that exert anti-inflammatory effects. This study provides essential foundational data for the potential clinical applications of FMT.IMPORTANCEDespite variations in efficacy observed among donors, numerous studies have underscored the potential of fecal microbiota transplantation (FMT) for managing inflammatory bowel disease (IBD), indicating the presence of shared anti-IBD bacterial species. In the present study, the collective anti-inflammatory efficacy observed across all four donor groups prompted the identification of two common bacterial species using metagenomics. A significant negative correlation between Lactobacillus reuteri and IL-1β was revealed. Furthermore, mice gavaged with L. reuteri successfully managed the colitis challenge induced by dextran sodium sulfate (DSS), suggesting that L. reuteri may act as an efficacious bacterium mediating shared anti-inflammatory effects among variable donors. This finding highlights the utilization of variable donors to screen FMT core bacteria, which may be a novel strategy for developing FMT applications.
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- 2024
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40. Dual mass spectrometry imaging and spatial metabolomics to investigate the metabolism and nephrotoxicity of nitidine chloride
- Author
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Shu Yang, Zhonghua Wang, Yanhua Liu, Xin Zhang, Hang Zhang, Zhaoying Wang, Zhi Zhou, and Zeper Abliz
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Nitidine chloride ,Nephrotoxicity ,Mass spectrometry imaging ,Spatial metabolomics ,Toxicokinetics ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Evaluating toxicity and decoding the underlying mechanisms of active compounds are crucial for drug development. In this study, we present an innovative, integrated approach that combines air flow-assisted desorption electrospray ionization mass spectrometry imaging (AFADESI-MSI), time-of-flight secondary ion mass spectrometry (ToF-SIMS), and spatial metabolomics to comprehensively investigate the nephrotoxicity and underlying mechanisms of nitidine chloride (NC), a promising anti-tumor drug candidate. Our quantitive AFADESI-MSI analysis unveiled the region specific of accumulation of NC in the kidney, particularly within the inner cortex (IC) region, following single and repeated dose of NC. High spatial resolution ToF-SIMS analysis further allowed us to precisely map the localization of NC within the renal tubule. Employing spatial metabolomics based on AFADESI-MSI, we identified over 70 discriminating endogenous metabolites associated with chronic NC exposure. These findings suggest the renal tubule as the primary target of NC toxicity and implicate renal transporters (organic cation transporters, multidrug and toxin extrusion, and organic cation transporter 2 (OCT2)), metabolic enzymes (protein arginine N-methyltransferase (PRMT) and nitric oxide synthase), mitochondria, oxidative stress, and inflammation in NC-induced nephrotoxicity. This study offers novel insights into NC-induced renal damage, representing a crucial step towards devising strategies to mitigate renal damage caused by this compound.
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- 2024
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41. Understanding the treatment response and resistance to targeted therapies in non-small cell lung cancer: clinical insights and perspectives
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Hang Zhang, Yingying Zhang, Yingying Zhu, Tian Dong, and Zheng Liu
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non-small cell lung cancer ,targeted therapy ,treatment response ,drug resistance ,tyrosine kinase inhibitor ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Lung cancer remains the leading cause of mortality worldwide. Non-small cell lung cancer (NSCLC) is the most common subtype of lung cancer with a generally poor prognosis. In recent years, advances in targeted therapy and sequencing technology have brought significant improvement in the therapeutic outcomes of patients with advanced NSCLC. Targeted inhibitors directed against specific mutated or rearranged oncogenes, such as epidermal growth factor receptor (EGFR), anaplastic lymphoma kinase (ALK), and receptor tyrosine kinase ROS proto-oncogene 1(ROS1) among others, exhibit promising anti-tumor activity. Unfortunately, some patients develop acquired resistance and disease progression soon after initial remission. Despite the continuous development of new drugs and strategies to overcome drug resistance, it is still a major challenge in the treatment of NSCLC. The landscape of targeted therapy for NSCLC is evolving rapidly in response to the pace of scientific research. This study aimed to provide a comprehensive review of tumor target antigens and agents related to targeted therapy in NSCLC.
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- 2024
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42. Effects of nano-alumina on Portland concrete at low temperatures (5 ℃)
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Chunqing Li, Guoyu Li, Qingsong Du, Xuyang Wu, Fei Wang, Juncen Lin, Jianwei Yue, Hang Zhang, Liyun Tang, and Hailiang Jia
- Subjects
Concrete ,Nano-alumina ,Low temperature ,Curing condition ,Compressive strength ,Microstructure ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
The purpose of this research is to solve the problem of concrete performance deterioration caused by low temperatures in cold regions. Based on the theoretical method of improving the performance of concrete with nanomaterials, the effect of nano-alumina (NA) on the properties of concrete under low- temperature curing is studied from the macro and micro scales. Through the compressive strength test, it is found that low-temperature curing reduces the compressive strength of concrete by more than 15%. Additionally, the incorporation of NA can make up for the adverse effects of low temperatures. Nevertheless, with the increase in the amount of inclusion, the compensation effect is decreasing, and 1% is the optimal amount of NA in concrete. Microscopic test methods such as mercury intrusion porosimetry (MIP), X-ray diffractometry (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) are used to explore the improvement mechanism of NA on concrete. The test results show that under low-temperature curing conditions, NA can still reduce the total porosity of the mortar in concrete, promote the hydration reaction of cement, consume more calcium hydroxide, generate more calcium silicate hydrate, thereby optimizing the microstructure and improving the performance of the concrete. In the future, the results and methodology of this study will provide guidance and reference for the scientific construction of concrete engineering in cold region environments.
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- 2024
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43. A 30‐year overview of sodium‐ion batteries
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Yun Gao, Hang Zhang, Jian Peng, Lin Li, Yao Xiao, Li Li, Yang Liu, Yun Qiao, and Shu‐Lei Chou
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commercial application ,electrode ,electrolyte ,sodium‐ion full cell ,strategies ,Production of electric energy or power. Powerplants. Central stations ,TK1001-1841 - Abstract
Abstract Sodium‐ion batteries (NIBs) have emerged as a promising alternative to commercial lithium‐ion batteries (LIBs) due to the similar properties of the Li and Na elements as well as the abundance and accessibility of Na resources. Most of the current research has been focused on the half‐cell system (using Na metal as the counter electrode) to evaluate the performance of the cathode/anode/electrolyte. The relationship between the performance achieved in half cells and that obtained in full cells, however, has been neglected in much of this research. Additionally, the trade‐off in the relationship between electrochemical performance and cost needs to be given more consideration. Therefore, systematic and comprehensive insights into the research status and key issues for the full‐cell system need to be gained to advance its commercialization. Consequently, this review evaluates the recent progress based on various cathodes and highlights the most significant challenges for full cells. Several strategies have also been proposed to enhance the electrochemical performance of NIBs, including designing electrode materials, optimizing electrolytes, sodium compensation, and so forth. Finally, perspectives and outlooks are provided to guide future research on sodium‐ion full cells.
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- 2024
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44. Multifaceted roles of IKZF1 gene, perspectives from bench to bedside
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Lin Feng, Hang Zhang, and Ting Liu
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IKZF1 gene ,IKAROS ,BCP-ALL ,Ph+ALL ,transcription factor ,MRD ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
The IKZF1 gene encodes a transcription factor that belongs to the family of zinc-finger DNA-binding proteins associated with chromatin remodeling. The protein product, IKAROS, had been proved to regulate lymphopoiesis. Subsequent mouse model studies have further confirmed its regulating role in lymphopoiesis as well as in hematopoiesis; besides, it associates with immune function, certain immune disorders like common variable immunodeficiency and dysgammaglobulinemia have been proved to be associated with germline IKZF1 mutations. Dysfunction of IKAROS also bears paramount significance in leukemic transformation and alterations of IKZF1 gene predicts a poor prognosis in hematological malignancies. As an independent prognostic marker, IKZF1 has been incorporated in the risk stratification of BCP-ALL and stratification-guided therapy has also been generated. In this review, we provide a concise and comprehensive overview on the multifaceted roles of IKZF1 gene.
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- 2024
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45. A new evaluation system for drug–microbiota interactions
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Tian‐Hao Liu, Chen‐Yang Zhang, Hang Zhang, Jing Jin, Xue Li, Shi‐Qiang Liang, Yu‐Zheng Xue, Feng‐Lai Yuan, Ya‐Hong Zhou, Xiu‐Wu Bian, and Hong Wei
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drug metabolism ,drug–microbiota interactions ,genetic and environmental factors ,gut microbiota ,Computer applications to medicine. Medical informatics ,R858-859.7 - Abstract
Abstract The drug response phenotype is determined by a combination of genetic and environmental factors. The high clinical conversion failure rate of gene‐targeted drugs might be attributed to the lack of emphasis on environmental factors and the inherent individual variability in drug response (IVDR). Current evidence suggests that environmental variables, rather than the disease itself, are the primary determinants of both gut microbiota composition and drug metabolism. Additionally, individual differences in gut microbiota create a unique metabolic environment that influences the in vivo processes underlying drug absorption, distribution, metabolism, and excretion (ADME). Here, we discuss how gut microbiota, shaped by both genetic and environmental factors, affects the host's ADME microenvironment within a new evaluation system for drug–microbiota interactions. Furthermore, we propose a new top‐down research approach to investigate the intricate nature of drug–microbiota interactions in vivo. This approach utilizes germ‐free animal models, providing foundation for the development of a new evaluation system for drug–microbiota interactions.
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- 2024
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46. Occurrence Mechanism of the Abnormal Gelation Phenomenon of High Temperature Cementing Slurry Induced by a Polycarboxylic Retarder
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Xiujian Xia, Hang Zhang, Yongjin Yu, Junxing Li, Yun Cheng, Pu Xu, Miaomiao Hu, and Jintang Guo
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Chemistry ,QD1-999 - Published
- 2024
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47. Structure and Ionic Conductivity of Ga and Nb Dual Doped LLZO Synthesized by Sol-Gel Method
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Jun LI, Fuzhong WANG, Leichao MENG, Tao GAO, Bo LIANG, Hang ZHANG, Meili CUI, Xinxin LU, Ying CAO, and Jiyong CHEN
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solid state electrolyte ,dual doped ,conductivity ,sol gel ,Mining engineering. Metallurgy ,TN1-997 - Abstract
More and more attention has been focused on Li7La3Zr2O12 (LLZO) because of the high ionic conductivity and excellent chemical stability. It is great significance to find suitable dopants for locking cubic LLZO and improving the conductivity of Li+ ions. The uniform nano powder can be obtained by the sol gel synthetic method, which is conducive to maintaining high sintering activity. In this work, Ga and Nb dual doped LLZO solid electrolyte powders were synthesized via sol gel method, and Ga and Nb dual doped LLZO solid electrolyte ceramic were obtained via traditional solid state sintering method. The phase and microstructure of Ga and Nb co-doped LLZO solid electrolyte were analyzed by combine X-ray diffraction with scanning electron microscope. The impedance of Ga and Nb dual doped LLZO (Li6.8-3xGaxLa3Zr1.8Nb0.2O12 (0≤x≤0.3)) solid electrolyte was measured by the electrochemical workstation, and then the conductivity was calculated. The results show that when the doping amount of Ga is x=0.2, it is a pure cubic LLZO structure with the highest conductivity value of 3.7×10-4 S cm-1 (tested at room temperature) due to the sample has a high relative density and reaches the optimal Li+ vacancy concentration.
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- 2024
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48. Countering AC Load Redistribution Attacks in Smart Grids: The Role of Moving Target Defense in a Defense-Attack Game
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Bo Liu, Hongyu Wu, and Hang Zhang
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AC load redistribution attacks ,moving target defense ,zero-sum game ,optimal strategy ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Load redistribution attacks (LRAs) are a type of false data injection attack that disrupts the normal operation of the power grid by redistributing load. While most LRAs in the literature are based on the DC model, this paper proposes an LRA in the AC model using incomplete network information. To defend against the proposed LRA, the paper proposes using Moving Target Defense (MTD) to actively invalidate the attackers’ knowledge. A zero-sum defense-attack game is formulated between MTD and LRA to select an MTD operating range optimally, considering the trade-off between attack detection effectiveness and the extra operation cost. The paper defines a new payoff function as an expected incremental operation cost, consisting of the defense cost, attack cost, and attack mitigation capability. A Nash Equilibrium of the game provides optimal strategies for selecting the MTD operating range. Simulation results on the modified IEEE 14-bus system demonstrate the effectiveness of MTD in detecting the proposed LRA. The paper shows that MTD not only detects ongoing LRAs but also prevents the construction of such attacks by using the proposed game theoretical framework. The proposed approach highlights the role of MTD in enhancing the cybersecurity of power grids against LRAs.
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- 2024
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49. Dynamic monitoring of UBA1 somatic mutations in patients with relapsing polychondritis
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Suying Duan, Haiyang Luo, Yunchao Wang, Dongbin Jiang, Jiajia Liu, Jiaqi Li, Honglin Zheng, Taiqi Zhao, Chenyang Liu, Hang Zhang, Chengyuan Mao, Lei Zhang, and Yuming Xu
- Subjects
Droplet digital PCR ,UBA1 ,Somatic mutations ,Relapsing polychondritis ,Dynamic monitoring ,VEXAS ,Medicine - Abstract
Abstract Background Commonly clinically diagnosed with relapsing polychondritis (RP), vacuoles, E1 enzyme, X-linked, autoinflammatory, somatic syndrome (VEXAS) is a recently identified autoinflammatory disease caused by UBA1 somatic mutations. The low frequency and dynamic changes challenge the accurate detection of somatic mutations. The present study monitored these mutations in Chinese patients with RP. We included 44 patients with RP. Sanger sequencing of UBA1 was performed using genomic DNA from peripheral blood. Droplet digital polymerase chain reaction (ddPCR) was performed to screen low-prevalence somatic variants. Results Multiple ddPCR detections were performed using available blood samples collected at different follow-up time points. Three male patients were UBA1 somatic mutation carriers. Sanger sequencing detected the somatic UBA1 variant c.122T > C (p.Met41Thr) in two male patients. Initial ddPCR confirmed the variant in the two patients, with allele fractions of 73.75% and 88.46%, respectively, while yielding negative results in other patients. Subsequent ddPCR detected the somatic variant (c.122T > C) with low prevalence (1.02%) in another male patient from blood samples collected at a different time point, and confirmed dynamically fractional abundance in one patient with VEXAS, with allele fractions of 73.75%, 61.28%, 65.01%, and 73.75%. Nine patients assessed by ddPCR at different time points remained negative. Conclusion We report UBA1 variants in patients with RP in the Chinese population for the first time. Multiple ddPCR detections from samples collected at different time points can enhance sensitivity and should be considered for patients with initial negative ddPCR results.
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- 2024
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50. A Hybrid Method for Identifying the Feeding Behavior of Tilapia
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Yingying Cao, Shuangyin Liu, Mingyan Wang, Wenjun Liu, Tonglai Liu, Liang Cao, Jianjun Guo, Dachun Feng, Hang Zhang, Shahbaz Gul Hassan, and Longqin Xu
- Subjects
Tilapia ,deep learning ,ResNet34 ,feeding behavior ,migration learning ,CBAM ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
In aquaculture, quantifying the real-time feeding behaviour of fish is essential for making feeding decisions. However, most existing methods for assessing fish appetite are inefficient and subjective. To address these issues, this study proposes an improved tilapia feeding level classification model with ResNet34. First, we introduce the attention module CBAM into the ResNet34 model to adjust the attention of the model according to the importance of different channel features and enhance the effective extraction of important features. We then used migration learning to transfer the knowledge learned from the source data (ImageNet dataset) to the tilapia ingestion image dataset, which allowed us to train the tilapia ingestion behaviour classification model faster while retaining the pre-trained model. Experimental results showed that the improved ResNet34 model in this study achieved an accuracy of 99.72%, an improvement of 7.84 percentage points over the original model. In addition, the model outperformed models such as MobileNetV2, AlexNet, VGG11, ShuffleNet_v2_x0_5 and ResNet18 in terms of accuracy, precision, recall and F1 scores.These results suggest that the proposed method can accurately identify feeding behavior of fish and provide a scientific basis for determining feeding amounts.
- Published
- 2024
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