26 results on '"Yichen Xu"'
Search Results
2. Photochemical degradation of perfluorooctanoic acid under UV irradiation in the presence of Fe (III)-saturated montmorillonite
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Yutong Zhang, Xinhao Wang, Yichen Xu, Liuqing Huang, Wenran Wang, Cheng Gu, Ming Zhang, and Zhanghao Chen
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Environmental Engineering ,Environmental Chemistry ,Pollution ,Waste Management and Disposal - Published
- 2023
3. Pallidal activities during sleep and sleep decoding in dystonia, Huntington's, and Parkinson's disease
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Zixiao Yin, Yin Jiang, Timon Merk, Wolf-Julian Neumann, Ruoyu Ma, Qi An, Yutong Bai, Baotian Zhao, Yichen Xu, Houyou Fan, Quan Zhang, Guofan Qin, Ning Zhang, Jun Ma, Hua Zhang, Huanguang Liu, Lin Shi, Anchao Yang, Fangang Meng, Guanyu Zhu, and Jianguo Zhang
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Neurology - Published
- 2023
4. Effect of post-rinsing time on the mechanical strength and cytotoxicity of a 3D printed orthodontic splint material
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Yichen Xu, Alexander B. Xepapadeas, Bernd Koos, Jürgen Geis-Gerstorfer, Ping Li, and Sebastian Spintzyk
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Materials science ,Surface Properties ,Scanning electron microscope ,medicine.medical_treatment ,02 engineering and technology ,Surface finish ,Bending ,Methacrylate ,03 medical and health sciences ,0302 clinical medicine ,Flexural strength ,Flexural Strength ,Materials Testing ,medicine ,General Materials Science ,Viability assay ,Composite material ,General Dentistry ,Aqueous solution ,030206 dentistry ,021001 nanoscience & nanotechnology ,Splints ,Mechanics of Materials ,Printing, Three-Dimensional ,0210 nano-technology ,Splint (medicine) - Abstract
Objective Since the post-rinsing time is inconsistently recommended, this study aims to investigate the effect of post-rinsing time on the flexural strength and cytotoxicity of an stereolithographically (SLA) printed orthodontic splint material. Methods SLA-printed specimens were ultrasonically rinsed with isopropanol (IPA) for 5 min, 12 min, 20 min, 30 min, 1 h, and 12 h, respectively. Surface characterization was conducted by scanning electron microscopy and roughness measurements. Flexural strength was evaluated using a three-point bending test. Cytotoxicity was determined by direct contact test and extract test. For both tests, cell viability (live/dead staining) and cell metabolic activity (CCK-8 assay) were evaluated. Additionally, water sorption and water solubility were tested to analyze the mass loss from immersion. Results No apparent surface alterations could be detected on the samples post-rinsed for less than 1 h. In contrast, when the post-rinsing time was prolonged to 12 h, surface fissures could be observed. Flexural strength linearly decreased with increasing post-rinsing time. All post-processed specimens did not show an obvious cytotoxic effect. Significance The removal of cytotoxic methacrylate monomers by post-rinsing with IPA could be achieved in 5 min. Extending post-rinsing time could not improve the cytocompatibility of the SLA-printed orthodontic splint material, and may result in a decrease in flexural strength.
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- 2021
5. De Novo CD5+ Diffuse Large B-Cell Lymphoma: Biology, Mechanism, and Treatment Advances
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Wenjie Sun, Fei Li, and Yichen Xu
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0301 basic medicine ,Cancer Research ,Vincristine ,business.industry ,Hematology ,medicine.disease ,Transplantation ,03 medical and health sciences ,Leukemia ,030104 developmental biology ,0302 clinical medicine ,International Prognostic Index ,Oncology ,immune system diseases ,hemic and lymphatic diseases ,030220 oncology & carcinogenesis ,medicine ,Cancer research ,Vindesine ,Rituximab ,business ,Diffuse large B-cell lymphoma ,medicine.drug ,Lenalidomide - Abstract
Despite its low frequency in all variants of diffuse large B-cell lymphoma (DLBCL), CD5+ DLBCL has gradually gained the attention it deserves, the result of its poorer outcomes compared to DLBCL without the CD5 signature. CD5+ DLBCL is classified as activated B-cell-like (ABC)/non-germinal-center B-cell-like (GCB) DLBCL with elusive genetic features, and patients are frequently characterized as being older and female, and as having Eastern Cooperative Oncology Group performance status > 1, high International Prognostic Index score, tendency to develop B symptoms, and advanced-stage disease with high central nervous system relapse and bone marrow involvement rate. The mechanism underlying the poor prognosis in CD5+ DLBCL has not been fully explored, and we summarize the reported potential mechanisms, including CD5-mediated B-cell receptor (BCR)-dependent and -independent pathways. The former involves the inhibition of BCR signaling, and the latter involves the BCR-independent overexpression of interleukin 10, Bcl-2 (antiapoptotic B-cell leukemia/lymphoma 2), cyclin D2, and CXCR4 (C-X-C motif chemokine receptor 4). The efficacy of traditional regimen R-CHOP (rituximab plus cyclophosphamide, doxorubicin, vincristine, and prednisone) is currently not satisfied in CD5+ DLBCL. Therapies of larger doses, such as R-DA-EPOCH (etoposide, prednisone, vincristine, cyclophosphamide, and doxorubicin plus rituximab), R-ACVBP (rituximab plus doxorubicin, cyclophosphamide, vindesine, bleomycin, and prednisone), R-DA-EPOCH plus central nervous system prophylaxis, can improve the overall survival in CD5+ DLBCL patients, while allogeneic hematopoietic stem-cell transplantation still remains controversial as a salvage treatment. In addition, some novel drugs, such as lenalidomide, CXCR4 antagonists, Bruton tyrosine kinase inhibitors, Bcl-2 inhibitors, and immunotherapy, have been reported to have encouraging results and may improve the outcomes of these patients. In the present review, we comprehensively summarize the biology, mechanism, and treatment of CD5+ DLBCL.
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- 2020
6. Peel bond strength between 3D printing tray materials and elastomeric impression/adhesive systems: A laboratory study
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Christine Schille, Yichen Xu, Sebastian Spintzyk, Jürgen Geis-Gerstorfer, Ernst Schweizer, and Fabian Huettig
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Dental Impression Technique ,Materials science ,Scanning electron microscope ,Dental Cements ,Fused filament fabrication ,02 engineering and technology ,Surface finish ,Elastomer ,03 medical and health sciences ,0302 clinical medicine ,Tensile Strength ,Materials Testing ,General Materials Science ,Composite material ,General Dentistry ,Bond strength ,Dental Impression Materials ,Dental Bonding ,030206 dentistry ,021001 nanoscience & nanotechnology ,Impression ,Tray ,Mechanics of Materials ,Printing, Three-Dimensional ,Adhesive ,0210 nano-technology - Abstract
The present study aimed to evaluate the bonding between three 3D printed custom tray materials and three elastomeric impression/adhesive systems using the peel test.Test blocks were 3D printed by three different technologies using Dental LT, FREEPRINT tray, and polylactide (PLA) tray materials. The reference test blocks were conventionally fabricated with Zeta Tray LC, a light-curing resin. The surface topographies of the four tray materials were investigated by scanning electron microscopy (SEM) analyses and roughness measurements. The peel bond strength between the four tray materials and three impression/adhesive systems, vinylsiloxanether (VSXE), vinyl polysiloxane (VPS), and polyether (PE), was measured (n=12 per group). The peeling failure modes and rupture sites were identified microscopically.The four tray materials featured different surface topographies. The peel bond strength was not significantly different with VSXE and PE, but PLA and the reference showed higher peel bond strength with VPS than the Dental LT and FREEPRINT tray (p0.05). The rupture site of adhesive failure in all groups was partly at the adhesive-impression material interface and partly within the adhesive but never at the adhesive-tray material interface.The 3D printed tray materials can achieve satisfactory chemical compatibility with the adhesives of VSXE, VPS, and PE. Surface topographies generated by the 3D printing technologies may affect bonding. Generally, 3D printed tray materials can provide clinically adequate bond strength with the elastomeric impression/adhesive systems. PLA is recommended for bonding with VPS when severe impression removal resistance is detected.
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- 2020
7. A Phase II Randomized Controlled Trial of Renshen Yangrong Tang Herbal Extract Granules for Fatigue Reduction in Cancer Survivors
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Tsun Hsuan Chen, Yanzhi Chen, Xin Shelley Wang, Ping-ping Li, Qiuling Shi, and Yichen Xu
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China ,medicine.medical_specialty ,Panax ,Time to effect ,Traditional Chinese medicine ,Intervention group ,Context based ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,Cancer Survivors ,Randomized controlled trial ,law ,Neoplasms ,Internal medicine ,Humans ,Medicine ,030212 general & internal medicine ,Medicine, Chinese Traditional ,Fatigue ,General Nursing ,business.industry ,Cancer ,Symptom reduction ,medicine.disease ,Anesthesiology and Pain Medicine ,030220 oncology & carcinogenesis ,Toxicity ,Neurology (clinical) ,business - Abstract
Based on the traditional Chinese medicine theory, Renshen Yangrong Tang (RSYRT), which is a mixture of 12 herbs, was commonly used as a pharmacological option in China for fatigue management by correcting Qi deficiency.This randomized controlled Phase II trial investigated the efficacy of RSYRT for reducing cancer-related fatigue.Cancer survivors with moderate or severe fatigue (rated ≥4 on a 0-10 scale) for more than two months were randomized to take herbal extract granules of RSYRT or a low dose of a single herb (huangqi) twice a day for six weeks. Patient-reported fatigue was measured using the MD Anderson Symptom Inventory. Efficacy of RSYRT was evaluated using mixed model to test the differences over time among groups. We also conducted responder analyses and examined time to effect of symptom reduction.None of the 83 evaluable patients (control group 42; intervention group 41) had discomfort or Grade 3 or 4 toxicity. We observed a significantly greater MD Anderson Symptom Inventory-fatigue score reduction in the intervention group than that in the control group (time-by-group interaction: estimate = -0.61 [0.10]; P 0.0001). More patients in the intervention group had a two-point reduction on fatigue than that of the control group (90.2% vs. 52.4%). By Week 4, between-group differences of fatigue reduction on mean severity reached large effect size (intervention group vs. control group: -2.66 vs. -1.36; Cohen's d = 1.0; P 0.0001).Compared with control therapy, RSYRT therapy elicits a statistical and clinical improvement of fatigue severity and functioning. The effectiveness of RSYRT in managing cancer-related fatigue warrants further study in the real world.
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- 2020
8. On the Ε → Τ Phase Transformation and Twinning in L1 0-MnAl Alloys
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Yuxiao Jia, Hanlin Ding, Yuye Wu, Jingmin Wang, Haichen Wu, Tianyu Ma, Shiteng Zhao, Konstantin Skokov, Alex Aubert, Fernando Maccari, Oliver Gutfleisch, Yichen Xu, Jiejue Niu, Boying Qiao, Shuang Zhao, and Chengbao Jiang
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History ,Polymers and Plastics ,Business and International Management ,Industrial and Manufacturing Engineering - Published
- 2022
9. Roadmap Towards Optimal Magnetic Properties in Rare-Earth-Free L1 0-MnAl Permanent Magnets
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Yuxiao Jia, Yuye Wu, Yichen Xu, Ruixiao Zheng, Shiteng Zhao, Konstantin Skokov, Fernando Maccari, Alex Aubert, Oliver Gutfleisch, Jingmin Wang, Hui Wang, Jianxin Zou, and Chengbao Jiang
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History ,Polymers and Plastics ,Business and International Management ,Industrial and Manufacturing Engineering - Published
- 2022
10. Vitamin C Regulates the Profibrotic Activity of Myofibroblasts In In Vitro Replica Settings of Myocardial Infarction
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Yichen Xu, Huabo Zheng, Pakhwan Nilcham, Octavian Bucur, Elisa Anamaria Liehn, and Mihaela Rusu
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- 2022
11. Decay of fallen wood and elevation affects soil fungal community assembly and indirectly controls community diversity
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Yichen Xu, Yazhen Chen, Peng Dang, Xingjian Jiang, Wei Zheng, Junjie Lei, and Wende Yan
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Ecology ,Soil Science ,Agricultural and Biological Sciences (miscellaneous) - Published
- 2023
12. Roadmap towards optimal magnetic properties in L10-MnAl permanent magnets
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Yuxiao Jia, Yuye Wu, Yichen Xu, Ruixiao Zheng, Shiteng Zhao, Konstantin P. Skokov, Fernando Maccari, Alex Aubert, Oliver Gutfleisch, Jingmin Wang, Hui Wang, Jianxin Zou, and Chengbao Jiang
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Polymers and Plastics ,Metals and Alloys ,Ceramics and Composites ,Electronic, Optical and Magnetic Materials - Published
- 2023
13. Preparation of polymer composites with high thermal conductivity by constructing a 'double thermal conductive network' via electrostatic spinning
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Zirui Wang, Li Fan, Runlai Li, Yichen Xu, and Qiang Fu
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Polymers and Plastics ,Mechanics of Materials ,Materials Chemistry ,Ceramics and Composites - Published
- 2022
14. Perception of urban population characteristics through dietary taste patterns based on takeout data
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Yichen Xu, Linshu Hu, Song Gao, Mengxiao Wang, Jiale Ding, Yining Qiu, Feng Zhang, Zhenhong Du, and Renyi Liu
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Urban Studies ,Sociology and Political Science ,Tourism, Leisure and Hospitality Management ,Development - Published
- 2022
15. Hierarchical micro/nano/porous structure PVDF/hydrophobic GO photothermal membrane with highly efficient anti-icing/de-icing performance
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Yi Tian, Yichen Xu, Zongting Zhu, Yibin Liu, Junjian Xie, Baoliang Zhang, Hepeng Zhang, and Qiuyu Zhang
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Colloid and Surface Chemistry - Published
- 2022
16. Experimental studies of low-velocity impact behavior on hybrid metal wire net/woven carbon-fiber reinforced composite laminates
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Yun Wan, Jian Yao, Hao Li, Yonghu Huang, Peiyu You, Yichen Xu, and Zuxiang Lei
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Polymers and Plastics ,Mechanics of Materials ,Materials Chemistry ,Ceramics and Composites - Published
- 2022
17. On the ε → τ phase transformation and twinning in L10−MnAl alloys
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Yuxiao Jia, Hanlin Ding, Yuye Wu, Jingmin Wang, Haichen Wu, Tianyu Ma, Shiteng Zhao, Konstantin P. Skokov, Alex Aubert, Fernando Maccari, Oliver Gutfleisch, Yichen Xu, Jiejue Niu, Boying Qiao, Shuang Zhao, and Chengbao Jiang
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Polymers and Plastics ,Metals and Alloys ,Ceramics and Composites ,Electronic, Optical and Magnetic Materials - Published
- 2022
18. HNRNPA2B1 inhibited SFRP2 and activated Wnt-β/catenin via m6A-mediated miR-106b-5p processing to aggravate stemness in lung adenocarcinoma
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Liang, Rong, Yichen, Xu, Kai, Zhang, Lei, Jin, and Xiaobei, Liu
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Gene Expression Regulation, Neoplastic ,MicroRNAs ,Lung Neoplasms ,Heterogeneous-Nuclear Ribonucleoprotein Group A-B ,Humans ,Membrane Proteins ,Adenocarcinoma of Lung ,Cell Biology ,beta Catenin ,Pathology and Forensic Medicine - Abstract
Cancer stem cells (CSCs) exhibit strong self-renewal capability to contribute to tumorigenesis in lung adenocarcinoma (LUAD). N6-methyladenosine (m6A) methylation is confirmed as a key mechanism for stemness acquisition and tumor growth. Heterogeneous nuclear ribonucleoprotein A2B1 (HNRNPA2B1) is a known m6A reader and is reported to participate in LUAD progression, but its relation with stemness of LUAD cells is unknown. Thus, this study aimed to uncover the effect of HNRNPA2B1 in stemness of LUAD cells. The association of HNRNPA2B1 with LUAD prognosis was analyzed via Gene Expression Profiling Interactive Analysis (GEPIA). Sphere formation, cytometry flow analysis and western blot of stemness-related genes were performed to examine the stemness of LUAD cells. m6A modification was investigated by RNA immunoprecipitation. Results depicted that HNRNPA2B1 was upregulated in LUAD CSCs. HNRNPA2B1 knockdown repressed cell stemness, proliferation, migration, and tumor growth of LUAD. As to mechanism, HNRNPA2B1 read the m6A site on primary microRNA-106b (pri-miR-106b) to facilitate the maturing of miR-106b-5p, so that miR-106b-5p targeted secreted frizzled-related protein 2 (SFRP2), activating Wnt/β-catenin signaling. In conclusion, HNRNPA2B1 inhibits SFRP2 and activates Wnt-β/catenin via m6A-mediated maturing of miR-106b-5p to aggravate stemness and LUAD progression, which potentially offered HNRNPA2B1 as a potential marker in CSCs-targeted treatment for LUAD.
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- 2022
19. High lithium ionic conductivity of garnet-type oxide Li7+xLa3Zr2-xSmxO12 (x = 0–0.1) ceramics
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Yichen Xu, Xishu Wang, Xibin Yu, Yin Rui, Liang Zhao, Jie Liu, and Yonghua Cui
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Materials science ,Mechanical Engineering ,Analytical chemistry ,Sintering ,chemistry.chemical_element ,02 engineering and technology ,Electrolyte ,Conductivity ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,Metal ,Lithium ion transport ,chemistry ,Mechanics of Materials ,visual_art ,visual_art.visual_art_medium ,Fast ion conductor ,Ionic conductivity ,General Materials Science ,Lithium ,0210 nano-technology - Abstract
Li7La3Zr2O12 (LLZO) garnet is one of the most promising Lithium-ion solid electrolytes in all-solid-state Lithium-ion batteries, due to its higher chemical stability to Li metal and relatively higher lithium-ion conductivity. To further increase the electrical conductivity of LLZO, Sm3+ is doped into the Zr4+ site of LLZO so that excess Li occupies the position of the octahedral. Thereby lithium ion transport and increasing ionic conductivity are promoted. The optimal addition of Sm3+ is 0.06. Li7+xLa3Zr2-xSmxO12 (LLZSO, x = 0.06) electrolyte with cubic phase is obtained with sintering at 1200 °C for only 3 h. It has higher relative density and better ionic conductivity than the pristine LLZO. Its bulk and total ionic conductivity are ∼6.4 × 10−4 S·cm−1 and 2.46 × 10−4 S·cm−1 at 20 °C, respectively.
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- 2018
20. SiC foam with a hollow skeleton and microporous strut wall used as a membrane contactor for the liquid-liquid extraction of Ce3+ and Pr3+
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Yong Gao, Peng Wang, Ye Zhang, Jinsong Zhang, Zhenming Yang, and Yichen Xu
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Materials science ,Extraction (chemistry) ,Filtration and Separation ,Microporous material ,Biochemistry ,Membrane ,Ceramic membrane ,Chemical engineering ,Liquid–liquid extraction ,Hollow fiber membrane ,Mass transfer ,General Materials Science ,Physical and Theoretical Chemistry ,Porosity - Abstract
Membrane contactors have received considerable attention for extraction due to non-dispersive mass transfer through porous membranes. The past decades have seen the rapid development of organic hollow fiber membrane contactors, but very few studies have explored the applications of inorganic membranes in extraction, possibly due to their high costs. In this work, a novel SiC foam material with a hollow skeleton and microporous strut wall was used as a ceramic membrane contactor (HS-FCMC) for rare earths extraction. The foam's structure was characterized by scanning electron microscopy (SEM), X-ray micro-computed tomography (micro-CT), and mercury intrusion porosimetry (MIP). The flow and concentration fields inside and outside the foam cell were simulated by computational fluid dynamics (CFD), and the mass transfer through the ceramic membrane was analyzed. Based on the nitric acid–Ce3+/Pr3+–P507–kerosene chemical system, the extraction efficiency of Pr3+ and Ce3+ using the HS-FCMC reached 96.13% and 92.86%, respectively. A comparison study with poly tetra fluoroethylene (PTFE) hollow fibers was also conducted. The results indicate that the HS-FCMC is suitable for rare earths extraction due to the multiscale porous structure and chemical stability of the hollow-skeleton SiC foam. This research advances the knowledge of inorganic membrane extraction methods.
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- 2021
21. Giant heterogeneous magnetostriction induced by charge accumulation-mediated nanoinclusion formation in dual-phase nanostructured systems
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Chengbao Jiang, Yu Xiao, Zhongheng Fu, Jingmin Wang, Ruifeng Zhang, Yichen Xu, Yijun Chen, and Yuye Wu
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010302 applied physics ,Work (thermodynamics) ,Materials science ,Polymers and Plastics ,Condensed matter physics ,Doping ,Metals and Alloys ,Magnetostriction ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Magnetocrystalline anisotropy ,01 natural sciences ,Electronic, Optical and Magnetic Materials ,Tetragonal crystal system ,Phase (matter) ,Lattice (order) ,0103 physical sciences ,Ceramics and Composites ,0210 nano-technology ,Softening - Abstract
The fundamental origin of giant magnetostriction in dual-phase nanostructured systems is still under debate in recent years. Previous studies have revealed that the formation of tetragonal nanoinclusions induced the enlargement in local magnetocrystalline anisotropy, leading to a strengthened magneto–elastic coupling coefficient, which was considered to promote magnetostriction. Another key factor of magnetostriction, the influence of the nanoinclusions on the elastic constants of the lattices is, however, still not clear. In this work, we propose a mechanism based on the experimental and theoretical results of binary and rare-earth (RE) doped FeGa single-crystals. Doping traces of RE atoms effectively increase the density of nanoinclusions in the A2 matrix, due to the high selectivity of RE atoms they possess stronger bonding interaction with Fe atoms rather than Ga atoms. As a consequence, the elastic constant c 12 significantly increases with the rising density of tetragonal nanoinclusions as opposed to the constant c 11 , resulting in a remarkable enhancement in magnetostriction due to the immediate relevance between magnetostriction ( λ 001 ) and c 11 − c 12 . A superior magnetostriction of 390 ppm is obtained in the RE-doped single-crystal due to lattice softening induced by the nanoinclusions. This uncovered mechanism sheds light onto the contribution of RE atoms on the magnetostriction in FeGa single-crystals, and establishes a foundation for developing new-generation dual-phase magnetostrictive materials with unprecedented levels of magnetostriction.
- Published
- 2021
22. Study on performance of wave-plate mist eliminator with porous foam layer as enhanced structure. Part I: Numerical simulation
- Author
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Yichen Xu, Zhenming Yang, and Jinsong Zhang
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Pressure drop ,Materials science ,Computer simulation ,business.industry ,Turbulence ,Applied Mathematics ,General Chemical Engineering ,Mist ,02 engineering and technology ,General Chemistry ,Computational fluid dynamics ,021001 nanoscience & nanotechnology ,Industrial and Manufacturing Engineering ,020401 chemical engineering ,Shear stress ,0204 chemical engineering ,Composite material ,0210 nano-technology ,business ,Porosity ,Layer (electronics) ,Simulation - Abstract
Wave-plate mist eliminator with porous foam layers as enhanced structures on vanes to improve separation efficiency for tiny droplets was proposed in this paper. Overall separation efficiency, grade separation efficiency and pressure drop of the mist eliminators were systematically studied by using Computational Fluid Dynamics (CFD) method. The Shear Stress Transport (SST) k-ω turbulence model and Discrete Phase Model (DPM) were adopted to describe the motion of gas phase and liquid phase, respectively. The computational field was simplified by introducing an assumption that the real 3D structure of porous foam can be equivalent to 2D layout with randomly arranged circles. The CFD results showed that the separation efficiency was enhanced by increasing the foam layer thickness. Moreover, a gradual increase in the foam porosity at fixed PPI (pores per inch) value made the separation efficiency increased to a maximum value, then fall to a lower level, while by decreasing the PPI value of the foam at fixed porosity, the separation efficiency increased. Pressure drop was increased both with the increase in the foam layer thickness and PPI value as well as the decrease of the porosity. Furthermore, the flow field and the droplet trajectories were also analyzed.
- Published
- 2017
23. Study on performance of wave-plate mist eliminator with porous foam layer as enhanced structure. Part II: Experiments
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Jinsong Zhang, Yichen Xu, and Zhenming Yang
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Pressure drop ,Materials science ,Computer simulation ,Applied Mathematics ,General Chemical Engineering ,Mist ,02 engineering and technology ,General Chemistry ,021001 nanoscience & nanotechnology ,Industrial and Manufacturing Engineering ,020401 chemical engineering ,Volume (thermodynamics) ,Demister ,Outflow ,0204 chemical engineering ,Composite material ,0210 nano-technology ,Porosity ,Layer (electronics) ,Simulation - Abstract
In this paper, a new kind of wave-plate mist eliminator using open-celled porous silicon carbide foam layers as enhanced structure has been firstly proposed. The effects of foam layer geometry parameters (foam layer thickness, porosity, PPI) on droplet performance (separation efficiency and pressure drop) were experimentally investigated. Re-entrainment mechanism influenced by flooding state in the foam layer was also discussed. Downstream droplet diameter distribution under the re-entrainment conditions were also investigated by color-developing method. The results show that the sample with smaller foam pore size has larger volume mean diameter of secondary droplets in the outflow, due to its weaker liquid drainage ability. Comparisons between the experiment and our earlier numerical simulation demonstrate the average relative errors of the separation efficiency and the pressure drop are within 10%, meanwhile trends relating demister performance to foam geometry parameters are the same between the two sets of results, indicating the validity of the simulation method. In addition, two empirical correlations were obtained by fitting the experimental data, which can be used for predicting separation efficiency and pressure drop in the selected experiment conditions.
- Published
- 2017
24. Proteome-wide dataset supporting functional study of tyrosine kinases in breast cancer
- Author
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Yichen Xu, Justin Stebbing, Nicos Angelopoulos, Georgios Giamas, and Hua Zhang
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Proteomics ,0301 basic medicine ,Cell signaling ,Quantitative proteomics ,Biology ,lcsh:Computer applications to medicine. Medical informatics ,SILAC ,03 medical and health sciences ,Breast cancer ,0302 clinical medicine ,RNA interference ,Stable isotope labeling by amino acids in cell culture ,lcsh:Science (General) ,Data Article ,Multidisciplinary ,Tyrosine kinases ,Cell biology ,030104 developmental biology ,030220 oncology & carcinogenesis ,Proteome ,lcsh:R858-859.7 ,Tyrosine kinase ,Function (biology) ,lcsh:Q1-390 - Abstract
Tyrosine kinases (TKs) play an essential role in regulating various cellular activities and dysregulation of TK signaling contributes to oncogenesis. However, less than half of the TKs have been thoroughly studied. Through a combined use of RNAi and stable isotope labeling with amino acids in cell culture (SILAC)-based quantitative proteomics, a global functional proteomic landscape of TKs in breast cancer was recently revealed highlighting a comprehensive and highly integrated signaling network regulated by TKs (Stebbing et al., 2015) [1]. We collate the enormous amount of the proteomic data in an open access platform, providing a valuable resource for studying the function of TKs in cancer and benefiting the science community. Here we present a detailed description related to this study (Stebbing et al., 2015) [1] and the raw data have been deposited to the ProteomeXchange Consortium via the PRIDE partner repository with the identifier http://www.ebi.ac.uk/pride/archive/projects/PXD002065. Keywords: Breast cancer, Cell signaling, Proteomics, SILAC, Tyrosine kinases
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- 2016
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25. Characterization of the Tyrosine Kinase-Regulated Proteome in Breast Cancer by Combined use of RNA interference (RNAi) and Stable Isotope Labeling with Amino Acids in Cell Culture (SILAC) Quantitative Proteomics
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Nicos Angelopoulos, Justin Stebbing, Hua Zhang, Yichen Xu, A. Grothey, Paul Ajuh, Georgios Giamas, National Institute for Health Research, and Cancer Research UK
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Proteomics ,DYNAMICS ,Biochemistry & Molecular Biology ,Proteome ,INVASION ,Quantitative proteomics ,Cell Culture Techniques ,Breast Neoplasms ,Computational biology ,Biology ,THERAPY ,Biochemistry ,Biochemical Research Methods ,Analytical Chemistry ,DRUG-SENSITIVITY ,RNA interference ,Cell Line, Tumor ,Stable isotope labeling by amino acids in cell culture ,MD Multidisciplinary ,Humans ,Gene silencing ,Amino Acids ,Molecular Biology ,IN-VIVO ,GENE-EXPRESSION ,Genetics ,Science & Technology ,IDENTIFICATION ,Research ,DNA-REPLICATION ,Protein-Tyrosine Kinases ,NETWORKS ,Gene Expression Regulation, Neoplastic ,Doxorubicin ,Drug Resistance, Neoplasm ,Isotope Labeling ,MCF-7 Cells ,Female ,RNA Interference ,SCREEN ,Signal transduction ,Life Sciences & Biomedicine ,Tyrosine kinase ,Signal Transduction ,Regular Articles - Abstract
Tyrosine kinases (TKs) are central regulators in cellular activities and perturbations of TK signaling contribute to oncogenesis. However, less than half of the TKs have been thoroughly studied and a global functional analysis of their proteomic portrait is lacking. Here we conducted a combined approach of RNA interference (RNAi) and stable isotope labeling with amino acids in cell culture (SILAC)-based quantitative proteomics to decode the TK-regulated proteome and associated signaling dynamics. As a result, a broad proteomic repertoire modulated by TKs was revealed, upon silencing of the 65 TKs expressed in MCF7 breast cancer cells. This yielded 10 new distinctive TK clusters according to similarity in TK-regulated proteome, each characterized by a unique signaling signature in contrast to previous classifications. We provide functional analyses and identify critical pathways for each cluster based on their common downstream targets. Analysis of different breast cancer subtypes showed distinct correlations of each cluster with clinical outcome. From the significantly up- and down-regulated proteins, we identified a number of markers of drug sensitivity and resistance. These data supports the role of TKs in regulating major aspects of cellular activity, but also reveals redundancy in signaling, explaining why kinase inhibitors alone often fail to achieve their clinical aims. The TK-SILACepedia provides a comprehensive resource for studying the global function of TKs in cancer.
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- 2015
26. Nuclear TARBP2 Drives Oncogenic Dysregulation of RNA Splicing and Decay
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Henrik Molina, Yichen Xu, Davide Ruggero, Steven Zhang, Hoang C.B. Nguyen, Brian D. Dill, Bruce Culbertson, Lisa Fish, Hamed S. Najafabadi, Claudio R. Alarcón, Hani Goodarzi, Myles Hochman, Albertas Navickas, and Ross A. Okimoto
- Subjects
Lung Neoplasms ,RNA Stability ,Cell Cycle Proteins ,RNA-binding protein ,Mice, SCID ,m(6)A ,intron retention ,Medical and Health Sciences ,splicing regulation ,Mice ,0302 clinical medicine ,Mice, Inbred NOD ,Gene expression ,2.1 Biological and endogenous factors ,RNA, Neoplasm ,Aetiology ,Lung ,Cancer ,TARBP2 ,0303 health sciences ,Tumor ,Lung Cancer ,RNA-Binding Proteins ,Forkhead Transcription Factors ,Biological Sciences ,nuclear RNA decay ,Neoplasm Proteins ,Cell biology ,RNA splicing ,Biotechnology ,RNA methylation ,RNA Splicing ,Biology ,SCID ,Article ,Cell Line ,03 medical and health sciences ,breast cancer ,Cell Line, Tumor ,Genetics ,metastasis ,Animals ,Humans ,Molecular Biology ,Post-transcriptional regulation ,030304 developmental biology ,Nucleoprotein TPR ,Intron ,Cell Biology ,Trans-Activators ,Inbred NOD ,RNA ,Neoplasm ,ATP-Binding Cassette Transporters ,Generic health relevance ,030217 neurology & neurosurgery ,post-transcriptional regulation ,Developmental Biology - Abstract
Post-transcriptional regulation of RNA stability is a key step in gene expression control. We describe a regulatory program, mediated by the RNA binding protein TARBP2, that controls RNA stability in the nucleus. TARBP2 binding to pre-mRNAs results in increased intron retention, subsequently leading to targeted degradation of TARBP2-bound transcripts. This is mediated by TARBP2 recruitment of the m(6)A RNA methylation machinery to its target transcripts, where deposition of m(6)A marks influences the recruitment of splicing regulators, inhibiting efficient splicing. Interactions between TARBP2 and the nucleoprotein TPR then promote degradation of these TARBP2-bound transcripts by the nuclear exosome. Additionally, analysis of clinical gene expression datasets revealed a functional role for TARBP2 in lung cancer. Using xenograft mouse models, we find that TARBP2 impacts tumor growth in the lung, and that this is dependent on TARBP2-mediated destabilization of ABCA3 and FOXN3. Finally, we establish ZNF143 as an upstream regulator of TARBP2 expression.
- Published
- 2019
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