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Raviol J, Plet G, Hasegawa R, Yu K, Kosukegawa H, Ohta M, Magoariec H, Pailler-Mattei C. Towards the mechanical characterisation of unruptured intracranial aneurysms: Numerical modelling of interactions between a deformation device and the aneurysm wall. J Mech Behav Biomed Mater 2024; 153:106469. [PMID: 38402693 DOI: 10.1016/j.jmbbm.2024.106469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/13/2024] [Accepted: 02/15/2024] [Indexed: 02/27/2024]
Abstract
Intracranial aneurysm is a critical pathology related to the arterial wall deterioration. This work is an essential aspect of a large scale project aimed at providing clinicians with a non-invasive patient-specific decision support tool regarding the rupture risk assessment. A machine learning algorithm links the aneurysm shape observed and a database of UIA clinical images associated with in vivo wall mechanical properties and rupture characterisation. The database constitution is derived from a device prototype coupled with medical imaging. It provides the mechanical characterisation of the aneurysm from the wall deformation obtained by inverse analysis based on the variation of luminal volume. Before performing in vivo tests of the device on small animals, a numerical model was built to quantify the device's impact on the aneurysm wall under natural blood flow conditions. As the clinician will never be able to precisely situate the device, several locations were considered. In preparation for the inverse analysis procedure, artery material laws of increasing complexity were studied (linear elastic, hyper elastic Fung-like). Considering all the device locations and material laws, the device induced relative displacements to the Systole peak (worst case scenario with the highest mechanical stimulus linked to the blood flow) ranging from 375 μm to 1.28 mm. The variation of luminal volume associated with the displacements was between 0.95 % and 4.3 % compared to the initial Systole volume of the aneurysm. Significant increase of the relative displacements and volume variations were found with the study of different cardiac cycle moments between the blood flow alone and the device application. For forthcoming animal model studies, Spectral Photon CT Counting, with a minimum spatial resolution of 250 μm, was selected as the clinical imaging technique. Based on this preliminary study, the displacements and associated volume variations (baseline for inverse analyse), should be observable and exploitable.
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Affiliation(s)
- J Raviol
- Laboratoire de Tribologie et Dynamique des Systèmes, CNRS UMR 5513, Université de Lyon, École Centrale de Lyon, France
| | - G Plet
- Laboratoire de Tribologie et Dynamique des Systèmes, CNRS UMR 5513, Université de Lyon, École Centrale de Lyon, France
| | - R Hasegawa
- Graduate School of Engineering, Tohuku University, 980-8579, Sendai Miyagi, Japan; Institute of Fluid Science, Tohuku University, 980-8577, Sendai Miyagi, Japan
| | - K Yu
- Institute of Fluid Science, Tohuku University, 980-8577, Sendai Miyagi, Japan
| | - H Kosukegawa
- Institute of Fluid Science, Tohuku University, 980-8577, Sendai Miyagi, Japan
| | - M Ohta
- Institute of Fluid Science, Tohuku University, 980-8577, Sendai Miyagi, Japan; ElyT MaX, CNRS UMI 3537, Université de Lyon, Tohoku University, France, Japan
| | - H Magoariec
- Laboratoire de Tribologie et Dynamique des Systèmes, CNRS UMR 5513, Université de Lyon, École Centrale de Lyon, France
| | - C Pailler-Mattei
- Laboratoire de Tribologie et Dynamique des Systèmes, CNRS UMR 5513, Université de Lyon, École Centrale de Lyon, France; ISPB-Faculté de Pharmacie, Université Claude Bernard Lyon 1, Université de Lyon, France.
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Yang X, Yu K, Li K, Wang Z, Ji F, Li M. Research on mechanical properties of concrete by nano-TiC-BF-fly ash. Sci Rep 2024; 14:4800. [PMID: 38413719 PMCID: PMC10899179 DOI: 10.1038/s41598-024-55553-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 02/25/2024] [Indexed: 02/29/2024] Open
Abstract
Ultra-high-rise buildings require high concrete bearing capacity. Ordinary concrete often fails to meet the project requirements. Admixture of admixtures in concrete is a means of solution. Currently, studies on the incorporation of basalt fiber (BF) and fly ash (FA) in concrete are relatively mature. However, research on incorporating nano-Titanium Carbide (nano-TiC) in concrete is still relatively scarce, which has a lot of room for development. To further improve the mechanical properties of concrete, BF, and FA synergized with nano-TiC were incorporated into concrete to produce TBF concrete in this study. And Response Surface Methodology (RSM) was used to optimize the mechanical properties of concrete. The collapse and compressive deformation damage characteristics of concrete were analyzed. The microstructure of the cement matrix was analyzed by the SEM (Scanning Electron Microscope). An optimization model of the TBF concrete craving function was developed. Optimized ratios with compressive, split tensile, and flexural strengths as response objectives were obtained, and the accuracy of the optimized ratios was investigated using the same experimental conditions. The results of the study showed that FA increased the collapse of concrete, while nano-TiC and BF decreased the collapse of concrete. Under uniaxial compression, nano-TiC, FA, and BF together incorporated into concrete can improve its compressive damage state. Moderate amounts of nano-TiC, BF, and FA could improve the mechanical properties of concrete. Their optimal mixing ratio admixtures were 0.88%, 0.24%, and 5.49%, respectively. And the measured values under the same conditions were compared with the predicted values. The maximum difference in compressive strength was 6.09%. The maximum difference in split tensile strength was 7.14%. The maximum difference in flexural strength was 8.45%. This indicated that the accuracy of the RSM optimization model was good. A moderate amount of nano-TiC, FA, and BF could improve the densification of concrete.
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Affiliation(s)
- Xin Yang
- College of Water Resources and Electricity, Heilongjiang University, Harbin, 150080, China
| | - Kui Yu
- College of Water Resources and Electricity, Heilongjiang University, Harbin, 150080, China.
| | - Ke Li
- Key Laboratory of Impact and Structural Safety, Academy of Civil Engineering & Architecture, Nanyang Normal University, Nanyang, 473061, China
| | - Zhengjun Wang
- College of Water Resources and Electricity, Heilongjiang University, Harbin, 150080, China
| | - Fengchun Ji
- Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, People's Republic of China
| | - Mengyuan Li
- Key Laboratory of Impact and Structural Safety, Academy of Civil Engineering & Architecture, Nanyang Normal University, Nanyang, 473061, China
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Antoine R, Yao Q, Yu K. Looking for atomic precision in nanochemistry. Commun Chem 2024; 7:24. [PMID: 38316890 PMCID: PMC10844595 DOI: 10.1038/s42004-023-01057-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024] Open
Affiliation(s)
- Rodolphe Antoine
- Institut Lumière Matière UMR 5306, Université Claude Bernard Lyon 1, CNRS, Univ Lyon, F69100, Villeurbanne, France.
| | - Qiaofeng Yao
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Key Laboratory of Organic Integrated Circuits, Ministry of Education, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, P. R. China.
| | - Kui Yu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610065, P. R. China.
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Chen Q, Zhang Y, Chen S, Liu Y, Zhang C, Zhang M, Yu K. Surface-Ligand Tuned Reversible Transformations in Aqueous Environments Between CdSe Magic-Size Clusters and Their Precursor Compounds. Small 2024; 20:e2304277. [PMID: 37806760 DOI: 10.1002/smll.202304277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 09/17/2023] [Indexed: 10/10/2023]
Abstract
That magic-size clusters (MSCs) have their counterpart precursor compounds (PCs) has not been generally accepted by expertise circles. Here, experimental evidence to support this new concept is presented. With aqueous-phase CdSe MSCs as a model system, it is shown that when the MSCs are dispersed in water containing a certain amount of L-cysteine (Cys), the MSCs disappear slowly. Upon the addition of CdCl2 , the MSCs recover. It is proposed that after dispersing, the MSCs transform to their quasi-isomeric, non-absorbing PCs upon Cys addition. In the presence of CdCl2 , the PCs transform back to the MSCs due to Cys elimination. The surface ligand Cys of the MSCs plays a significant role in the reversible transformations. The present study provides compelling evidence that absorbing MSCs have their non-absorbing PCs. The study findings suggest that the transformation between two MSCs that display absorption spectral shifts in a stepwise pattern is assisted by their PCs.
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Affiliation(s)
- Qingyuan Chen
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610065, P. R. China
| | - Yu Zhang
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Shuo Chen
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610065, P. R. China
| | - Yuehui Liu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610065, P. R. China
| | - Chunchun Zhang
- Analytical and Testing Center, Sichuan University, Chengdu, 610065, P. R. China
| | - Meng Zhang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610065, P. R. China
| | - Kui Yu
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610065, P. R. China
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610065, P. R. China
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Xu R, Wang Z, Yang Y, Gu C, Luan C, Wang S, Chen X, Yu K. Formation and Transformation of CdS Clusters during the Prenucleation Stage and in a Dilute Dispersion at Room Temperature. Nano Lett 2024; 24:1294-1302. [PMID: 38230964 DOI: 10.1021/acs.nanolett.3c04287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
The formation and transformation of colloidal semiconductor clusters remain poorly understood. With CdS as a model system, we show that, in the reaction of cadmium myristate (Cd(MA)2) and S powder in 1-octadecene (ODE), clusters form in the prenucleation stage of quantum dots (QDs). Called precursor compounds (PCs), the clusters can transform to magic-size clusters (MSCs) in reaction at a relatively high temperature (MSC-322 displaying optical absorption peaking at 322 nm) or in a dispersion at room temperature (MSC-360). When the reaction temperature is increased, PC-360 forms at 140 °C, while PC-322 and MSC-322 form at 180 °C. In a dispersion of cyclohexane and octylamine, MSC-322 transforms to MSC-360 via MSC-345. The MSC-345 to MSC-360 transformation displays continuous and discontinuous shifts in the optical absorption. The PCs and MSCs are a group of isomers. The present findings bring insight into the cluster formation and isomerization in the prenucleation stage of QDs and in a dispersion.
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Affiliation(s)
- Rongkuan Xu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Zhe Wang
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Yusha Yang
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Cheng Gu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Chaoran Luan
- College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Shanling Wang
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Xiaoqin Chen
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Kui Yu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, Sichuan 610065, P. R. China
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, P. R. China
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Meng L, Zhao P, Jiang Y, You J, Xu Z, Yu K, Boccaccini AR, Ma J, Zheng K. Extracellular and intracellular effects of bioactive glass nanoparticles on osteogenic differentiation of bone marrow mesenchymal stem cells and bone regeneration in zebrafish osteoporosis model. Acta Biomater 2024; 174:412-427. [PMID: 38040077 DOI: 10.1016/j.actbio.2023.11.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 10/25/2023] [Accepted: 11/24/2023] [Indexed: 12/03/2023]
Abstract
Bioactive glass nanoparticles (BGNs) are well-recognized multifunctional biomaterials for bone tissue regeneration due to their capability to stimulate various cellular processes through released biologically active ions. Understanding the correlation between BGN composition and cellular responses is key to developing clinically usable BGN-based medical devices. This study investigated the influence of CaO content of binary SiO2-CaO BGNs (CaO ranging from 0 to 10 mol%) on osteogenic differentiation of rat bone marrow mesenchymal stem cells (rBMSCs) and in vivo bone regeneration in zebrafish osteoporosis model. The results showed that BGNs could promote osteogenic differentiation of rBMSCs by indirectly releasing active ions or directly interacting with rBMSCs by internalization. In both situations, BGNs of a higher CaO content could promote the osteogenic differentiation of rBMSCs to a greater extent. The internalized BGNs could activate the transcription factors RUNX2 and OSX, leading to the expression of osteogenesis-related genes. The results in the zebrafish osteoporosis model indicated that the presence of BGNs of higher CaO contents could enhance bone regeneration and rescue dexamethasone-induced osteoporosis to a greater extent. These findings demonstrate that BGNs can stimulate osteogenic differentiation of rBMSCs by releasing active ions or internalization. A higher CaO content facilitates osteogenesis and bone regeneration of zebrafish as well as relieving dexamethasone-induced osteoporosis. The zebrafish osteoporosis model can be a potent tool for evaluating the in vivo bone regeneration effects of bioactive materials. STATEMENT OF SIGNIFICANCE: Bioactive glass nanoparticles (BGNs) are increasingly used as fillers of nanocomposites or as delivery platforms of active ions to regenerate bone tissue. Various studies have shown that BGNs can enhance osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) by releasing active ions. However, the correlation between BGN composition and cellular responses and in vivo bone regeneration effect has still not been well investigated. Establishment of a suitable in vivo animal model for investigating this correlation is also challenging. The present study reports the influence of CaO content in binary SiO2-CaO BGNs on osteogenic differentiation of BMSCs extracellularly and intracellularly. This study also demonstrates the suitability of zebrafish osteoporosis model to investigate in vivo bone regeneration effect of BGNs.
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Affiliation(s)
- Li Meng
- Jiangsu Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, China; Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210029, China
| | - Panpan Zhao
- Jiangsu Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, China; Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210029, China
| | - Yucheng Jiang
- Jiangsu Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, China
| | - Jiawen You
- Jiangsu Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, China
| | - Zhiyan Xu
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany
| | - Kui Yu
- Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, 2629 HZ Delft, the Netherlands
| | - Aldo R Boccaccini
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany
| | - Junqing Ma
- Jiangsu Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, China; Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing 210029, China; Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210029, China.
| | - Kai Zheng
- Jiangsu Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, China; Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210029, China.
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Yu K, Schanze KS. Commemorating The Nobel Prize in Chemistry 2023 for the Discovery and Synthesis of Quantum Dots. ACS Cent Sci 2023; 9:1989-1992. [PMID: 38033796 PMCID: PMC10683490 DOI: 10.1021/acscentsci.3c01296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
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Chen S, Zhang Y, Chen Q, Zhang C, Zhang M, Yu K. Precursor Compound-Assisted Formation of CdS Magic-Size Clusters in Aqueous Solutions. Inorg Chem 2023; 62:18290-18298. [PMID: 37883791 DOI: 10.1021/acs.inorgchem.3c02980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
Investigations of the formation pathway of semiconductor magic-size clusters (MSCs) in aqueous solutions are quite limited. Here, we present our understanding about a precursor compound (PC)-assisted formation pathway of aqueous-phase CdS MSCs exhibiting a characteristic absorption peak at about 360 nm (MSC-360). The reaction uses CdCl2 as the Cd source and thioglycolic acid (TGA) as both the S source and ligand in alkaline aqueous solutions. The mixture remains absorption featureless upon incubation at room temperature but with MSC-360 absorption observed upon adding butylamine. The longer the incubation period of the aqueous solution, the more MSC-360 forms after adding butylamine. We propose that Cd-TGA complexes form first, in which the TGA moieties then decompose partially to form PC of MSC-360 (PC-360) that cannot be observed in the optical absorption spectrum. The resulting PC-360 transforms to MSC-360 via quasi-isomerization in the presence of butylamine. The present study provides an in-depth understanding about the formation of aqueous-phase MSCs.
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Affiliation(s)
- Shuo Chen
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610065, China
| | - Yu Zhang
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Qingyuan Chen
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
| | - Chunchun Zhang
- Analytical & Testing Center, Sichuan University, Chengdu 610065, China
| | - Meng Zhang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
| | - Kui Yu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610065, China
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
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Wang T, Wang Z, Wang S, Chen X, Luan C, Yu K. Thermally-Induced Isomerization of Prenucleation Clusters During the Prenucleation Stage of CdTe Quantum Dots. Angew Chem Int Ed Engl 2023; 62:e202310234. [PMID: 37581340 DOI: 10.1002/anie.202310234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/14/2023] [Accepted: 08/14/2023] [Indexed: 08/16/2023]
Abstract
The evolution of prenucleation clusters in the prenucleation stage of colloidal semiconductor quantum dots (QDs) has remained unexplored. With CdTe as a model system, we show that substances form and isomerize prior to the nucleation and growth of QDs. Called precursor compounds (PCs), the prenucleation clusters are relatively optically transparent and can transform to absorbing magic-size clusters (MSCs). When a prenucleation-stage sample at 25, 45, or 80 °C is dispersed in a mixture of cyclohexane (CH) and octylamine (OTA) at room temperature, either MSC-371, MSC-417, or MSC-448 evolves with absorption peaking at 371, 417, or 448 nm, respectively. We propose that PC-371 forms at 25 °C, and isomerizes to PC-417 at 45 °C and to PC-448 at 80 °C. The PCs and MSCs are quasi isomers. Relatively large and small amounts of OTA favor PC-371 and PC-448 in dispersion, respectively. The present findings suggest the existence of PC-to-PC isomerization in the QD prenucleation stage.
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Affiliation(s)
- Tinghui Wang
- Engineering Research Center in Biomaterials, Sichuan University, 610065, Chengdu, Sichuan, P. R. China
| | - Zhe Wang
- Engineering Research Center in Biomaterials, Sichuan University, 610065, Chengdu, Sichuan, P. R. China
| | - Shanling Wang
- Analytical and Testing Center, Sichuan University, 610065, Chengdu, Sichuan, P. R. China
| | - Xiaoqin Chen
- Engineering Research Center in Biomaterials, Sichuan University, 610065, Chengdu, Sichuan, P. R. China
| | - Chaoran Luan
- Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, 610065, Chengdu, Sichuan, P. R. China
| | - Kui Yu
- Engineering Research Center in Biomaterials, Sichuan University, 610065, Chengdu, Sichuan, P. R. China
- Institute of Atomic and Molecular Physics, Sichuan University, 610065, Chengdu, Sichuan, P. R. China
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Yu K, Gao H. Sustainable development, eco-tourism carrying capacity and fuzzy algorithm-a study on Kanas in Belt and Road. Sci Rep 2023; 13:16789. [PMID: 37798267 PMCID: PMC10556031 DOI: 10.1038/s41598-023-41961-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 09/04/2023] [Indexed: 10/07/2023] Open
Abstract
In this paper, the method of fuzzy pattern recognition is adopted in more precisely evaluating the actual state of eco-tourism development regarding a given tourist destination in comparison with the three standard patterns (saturated/optimal/deficient) of development degree. The research process is as follows: Firstly, the indictors of carrying capacity of a tourist destination and the corresponding measuring factors are established; secondly, an assessment group is recruited to work out the most constraining factors among the measuring factors; thirdly, by means of field survey, numerical values of the actual state are acquired; fourthly, there comes out the membership vectors and the membership matrix of the standard patterns corresponding to the vectors of three standard patterns, threshold and the actual state; Finally, it could be identified which standard pattern that the actual state is closest to via the lattice degrees of proximity. An exemplary case study on Kanas National Nature Reserves is attached to the logic calculus. This paper is contributed to dynamically monitor the threshold of tourism carrying capacity and precisely identify which carrying capacity (spatial resource/ecological environment/economic resources/people's psychology/socio-culture) with potential risks.
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Affiliation(s)
- Kui Yu
- Glorious Sun School of Business and Management, Donghua University, Shanghai, China
| | - Han Gao
- College of Fashion and Art Design, Donghua University, Shanghai, China.
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Reyngold M, O'Reilly E, Zinovoy M, Hajj C, Wu AJ, Cuaron J, Romesser PB, Varghese AM, Park W, Yu K, Khalil DN, Lu W, Tyagi N, Diaz LA, Crane CH. Favorable Survival after Definitive Ablative RT in Surgically Resectable Pancreatic Cancer Patients. Int J Radiat Oncol Biol Phys 2023; 117:e335. [PMID: 37785177 DOI: 10.1016/j.ijrobp.2023.06.2390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Surgical resection has been considered the only curative option for patients with pancreatic adenocarcinoma (PDAC). Ablative RT ≥100Gy BED10 (A-RT) is associated with favorable survival in patients with locally advanced unresectable disease. We sought to evaluate A-RT outcomes in patients with technically resectable disease who did not undergo surgery. MATERIALS/METHODS Our prospectively maintained database of patients treated with A-RT was queried for consecutive patients with radiographic T1/T2 resectable PDAC. Patients were treated with a standardized technique within a large academic cancer center regional network. Ablative RT using several hypofractionated regimens was delivered on either standard Linacs with respiratory motion management, CBCT image guidance and selective adaptive replanning or MR-Linac with compression belt and daily on-line adaptive replanning. Freedom from local progression (FFLP), distant metastasis-free and overall survival (DMFS and OS, respectively) were analyzed using the Kaplan Meier estimates. RESULTS Between 2016 and 2022, 28 patients (54% male) with radiographically resectable PDAC received definitive A-RT. Median age was 80 (interquartile range, 77-84) years and 23 (82.1%) had KPS of 80 or below. Eighteen patients (64.3%) had T2 cancer, 5 (17.9%) were node positive, and 23 (82.1%) had head location. Median size was 2.6 (range, 1.6-4.0) cm with a median carbohydrate antigen 19-9 (CA19-9) of 160.5 (0-1823) U/mL. Twenty patients (71.4%) received induction chemotherapy for a median of 2.4 (0-6.2) months. RT regimens delivered on conventional Linacs unless otherwise indicated included 75Gy in 25 fractions (n = 15), 67.5Gy in 15 fractions (n = 10), 50Gy in 5 (N = 2, MR Linac), 60Gy in 10 (n = 1). 24-month FFLP and DMFS were 78.8% (52.3-91.7%) and 17.7% (95% CI, 5.8%-34.8%), respectively. 24-month and 48-month rate of OS from A-RT were 49.1% (95% CI, 27.53-67.5%) and 36.3 (95%16.0-57.1%). Grade 3 acute and late GI toxicity was noted in 3 and 1 patients, respectively, including 2 bleeding events treated with transfusions. There were no ≥ grade 4 events. CONCLUSION In patients with surgically resectable PDAC we found that definitive A-RT following multiagent induction therapy was associated with oncologic outcomes similar to resection with minimal toxicity.
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Affiliation(s)
- M Reyngold
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - E O'Reilly
- Memorial Sloan Kettering Cancer Center, New York, NY
| | - M Zinovoy
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - C Hajj
- Memorial Sloan Kettering Cancer Center, New York, NY
| | - A J Wu
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - J Cuaron
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - P B Romesser
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - A M Varghese
- Memorial Sloan Kettering Cancer Center, New York, NY
| | - W Park
- Memorial Sloan Kettering Cancer Center, New York, NY
| | - K Yu
- Memorial Sloan Kettering Cancer Center, New York, NY
| | - D N Khalil
- Memorial Sloan Kettering Cancer Center, New York, NY
| | - W Lu
- Memorial Sloan Kettering Cancer Center, New York, NY
| | - N Tyagi
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, NY
| | - L A Diaz
- Memorial Sloan Kettering Cancer Center, New York, NY
| | - C H Crane
- Memorial Sloan Kettering Cancer Center, New York, NY
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Wang Y, Cao F, Yu K, Liang J. Local Causal Discovery in Multiple Manipulated Datasets. IEEE Trans Neural Netw Learn Syst 2023; 34:7235-7247. [PMID: 35038298 DOI: 10.1109/tnnls.2021.3139389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We consider the problem of distinguishing direct causes from direct effects of a target variable of interest from multiple manipulated datasets with unknown manipulated variables and nonidentical data distributions. Recent studies have shown that datasets attained from manipulated experiments (i.e., manipulated data) contain richer causal information than observational data for causal structure learning. Thus, in this article, we propose a new algorithm, which makes full use of the interventional properties of a causal model to discover the direct causes and direct effects of a target variable from multiple datasets with different manipulations. It is more suited to real-world cases and is also a challenge to be addressed in this article. First, we apply the backward framework to learn parents and children (PC) of a given target from multiple manipulated datasets. Second, we orient some edges connected to the target in advance through the assumption that the target variable is not manipulated and then orient the remaining undirected edges by finding invariant V-structures from multiple datasets. Third, we analyze the correctness of the proposed algorithm. To the best of our knowledge, the proposed algorithm is the first that can identify the local causal structure of a given target from multiple manipulated datasets with unknown manipulated variables. Experimental results on standard Bayesian networks validate the effectiveness of our algorithm.
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13
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Cheng D, Li J, Liu L, Yu K, Duy Le T, Liu J. Toward Unique and Unbiased Causal Effect Estimation From Data With Hidden Variables. IEEE Trans Neural Netw Learn Syst 2023; 34:6108-6120. [PMID: 34995195 DOI: 10.1109/tnnls.2021.3133337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Causal effect estimation from observational data is a crucial but challenging task. Currently, only a limited number of data-driven causal effect estimation methods are available. These methods either provide only a bound estimation of causal effects of treatment on the outcome or generate a unique estimation of the causal effect but making strong assumptions on data and having low efficiency. In this article, we identify a problem setting with the Cause Or Spouse of the treatment Only (COSO) variable assumption and propose an approach to achieving a unique and unbiased estimation of causal effects from data with hidden variables. For the approach, we have developed the theorems to support the discovery of the proper covariate sets for confounding adjustment (adjustment sets). Based on the theorems, two algorithms are proposed for finding the proper adjustment sets from data with hidden variables to obtain unbiased and unique causal effect estimation. Experiments with synthetic datasets generated using five benchmark Bayesian networks and four real-world datasets have demonstrated the efficiency and effectiveness of the proposed algorithms, indicating the practicability of the identified problem setting and the potential of the proposed approach in real-world applications.
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14
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Wang Z, Li R, Zhang Y, Chan CLC, Haataja JS, Yu K, Parker RM, Vignolini S. Tuning the Color of Photonic Glass Pigments by Thermal Annealing. Adv Mater 2023; 35:e2207923. [PMID: 36482805 DOI: 10.1002/adma.202207923] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/21/2022] [Indexed: 06/17/2023]
Abstract
Thermal or solvent annealing is commonly employed to enhance phase separation and remove defects in block copolymer (BCP) films, leading to well-resolved nanostructures. Annealing is of particular importance for photonic BCP materials, where large, well-ordered lamellar domains are required to generate strong reflections at visible wavelengths. However, such strategies have not been considered for porous BCP systems, such as inverse photonic glasses, where the structure (and thus the optical response) is no longer defined solely by the chemical compatibility of the blocks, but by the size and arrangement of voids within the BCP matrix. In this study, a demonstration of how the concept of "thermal annealing" can be applied to bottlebrush block copolymer (BBCP) microparticles with a photonic glass architecture is presented, enabling their coloration to be tuned from blue to red. By comparing biocompatible BBCPs with similar composition, but different thermal behavior, it is shown that this process is driven by both a temperature-induced softening of the BBCP matrix (i.e., polymer mobility) and the absence of microphase separation (enabling diffusion-induced swelling of the pores). Last, this concept is applied toward the production of a thermochromic patterned hydrogel, exemplifying the potential of such responsive biocompatible photonic-glass pigments toward smart labeling or anticounterfeiting applications.
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Affiliation(s)
- Zhen Wang
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Ruiting Li
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Yating Zhang
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Chun Lam Clement Chan
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Johannes S Haataja
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Kui Yu
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Richard M Parker
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Silvia Vignolini
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
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Yang J, Li J, Kang J, Liu W, Kuang Y, Tan H, Yu Z, Yang L, Yang X, Yu K, Fan Y. Preparation of Ce-MnO x Composite Oxides via Coprecipitation and Their Catalytic Performance for CO Oxidation. Nanomaterials (Basel) 2023; 13:2158. [PMID: 37570476 PMCID: PMC10421365 DOI: 10.3390/nano13152158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/17/2023] [Accepted: 07/20/2023] [Indexed: 08/13/2023]
Abstract
Ce-MnOx composite oxide catalysts with different proportions were prepared using the coprecipitation method, and the CO-removal ability of the catalysts with the tested temperature range of 60-140 °C was investigated systematically. The effect of Ce and Mn ratios on the catalytic oxidation performance of CO was investigated using X-ray diffraction (XRD), X-ray energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), H2 temperature programmed reduction (H2-TPR), CO-temperature programmed desorption (CO-TPD), and in situ infrared spectra. The experimental results reveal that under the same test conditions, the CO conversion rate of pure Mn3O4 reaches 95.4% at 170 °C. Additionally, at 140 °C, the Ce-MnOx series composite oxide catalyst converts CO at a rate of over 96%, outperforming single-phase Mn3O4 in terms of catalytic performance. With the decrement in Ce content, the performance of Ce-MnOx series composite oxide catalysts first increase and then decrease. The Ce MnOx catalyst behaves best when Ce:Mn = 1:1, with a CO conversion rate of 99.96% at 140 °C and 91.98% at 100 °C.
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Affiliation(s)
- Junsheng Yang
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Jie Li
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Jiangang Kang
- Zhongye Changtian International Engineering Co., Ltd., Changsha 410205, China;
| | - Wenkang Liu
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Yijian Kuang
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Hua Tan
- State Key Laboratory of Material Processing and Die & Mould Technology, Wuhan 430074, China;
- School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zhensen Yu
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Liu Yang
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Xuejin Yang
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Kui Yu
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Yiquan Fan
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
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Li Y, Yu K, Zhang Y, Liang J, Wu X. Adaptive Prototype Interaction Network for Few-Shot Knowledge Graph Completion. IEEE Trans Neural Netw Learn Syst 2023; PP:1-14. [PMID: 37335781 DOI: 10.1109/tnnls.2023.3283545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Few-shot knowledge graph completion (FKGC), which aims to infer new triples for a relation using only a few reference triples of the relation, has attracted much attention in recent years. Most existing FKGC methods learn a transferable embedding space, where entity pairs belonging to the same relations are close to each other. In real-world knowledge graphs (KGs), however, some relations may involve multiple semantics, and their entity pairs are not always close due to having different meanings. Hence, the existing FKGC methods may yield suboptimal performance when handling multiple semantic relations in the few-shot scenario. To solve this problem, we propose a new method named adaptive prototype interaction network (APINet) for FKGC. Our model consists of two major components: 1) an interaction attention encoder (InterAE) to capture the underlying relational semantics of entity pairs by modeling the interactive information between head and tail entities and 2) an adaptive prototype net (APNet) to generate relation prototypes adaptive to different query triples by extracting query-relevant reference pairs and reducing the data inconsistency between support and query sets. Experimental results on two public datasets demonstrate that APINet outperforms several state-of-the-art FKGC methods. The ablation study demonstrates the rationality and effectiveness of each component of APINet.
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Yu K, Cai M, Wu X, Liu L, Li J. Multilabel Feature Selection: A Local Causal Structure Learning Approach. IEEE Trans Neural Netw Learn Syst 2023; 34:3044-3057. [PMID: 34529580 DOI: 10.1109/tnnls.2021.3111288] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Multilabel feature selection plays an essential role in high-dimensional multilabel learning tasks. Existing multilabel feature selection approaches mainly either explore the feature-label and feature-feature correlations or the label-label and feature-feature correlations. A few of them are able to deal with all three types of correlations simultaneously. To address this problem, in this article, we formulate multilabel feature selection as a local causal structure learning problem and propose a novel algorithm, M2LC. By learning the local causal structure of each class label, M2LC considers three types of feature relationships simultaneously and is scalable to high-dimensional datasets as well. To tackle false discoveries caused by the label-label correlations, M2LC consists of two novel error-correction subroutines to correct those false discoveries. Through local causal structure learning, M2LC learns the causal mechanism behind data, and thus, it can select causally informative features and visualize common features shared by class labels and specific features owned by an individual class label using the learned causal structures. Extensive experiments have been conducted to evaluate M2LC in comparison with the state-of-the-art multilabel feature selection algorithms.
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Zhang Y, Chen Q, Chen S, Wang S, Zhang M, Yu K. Evolution of Aqueous-Phase CdTe Magic-Size Clusters from Their Precursor Compounds. J Phys Chem Lett 2023:5188-5193. [PMID: 37253268 DOI: 10.1021/acs.jpclett.3c01137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Aqueous-phase semiconductor CdTe magic-size clusters (MSCs) have not been reported. Here, we report the first synthesis of aqueous-phase CdTe MSCs and propose that they evolve from their nonabsorbing precursor compounds (PCs). CdCl2 and Na2TeO3 are used as the respective Cd and Te sources, with l-cysteine as a ligand and NaBH4 as a reductant. When a 5 °C reaction mixture is dispersed in butylamine (BTA), CdTe MSCs evolve. We argue that the self-assembly of the Cd and Te precursors followed by the formation of the Cd-Te covalent bond inside each assembly results in one CdTe PC, which quasi-isomerizes to one CdTe MSC in the presence of BTA. At higher temperatures such as 25 °C, the PCs fragmentize, assisting the nucleation and growth of CdTe quantum dots. We introduce a novel synthetic approach to aqueous-phase CdTe PCs, which transform to CdTe MSCs in the presence of primary amines.
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Affiliation(s)
- Yu Zhang
- School of Chemical Engineering, Sichuan University, Chengdu, 610065 Sichuan, China
| | - Qingyuan Chen
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610065 Sichuan, China
| | - Shuo Chen
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610065 Sichuan, China
| | - Shanling Wang
- Analytical & Testing Center, Sichuan University, Chengdu, 610065 Sichuan, China
| | - Meng Zhang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610065 Sichuan, China
| | - Kui Yu
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610065 Sichuan, China
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610065 Sichuan, China
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19
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Wang D, Liu Y, Rowell N, Wang S, Zhang C, Zhang M, Luan C, Yu K. Direct and Indirect Evolution of Photoluminescent Semiconductor CdS Magic-Size Clusters through Their Precursor Compounds. Angew Chem Int Ed Engl 2023:e202304329. [PMID: 37188865 DOI: 10.1002/anie.202304329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 05/12/2023] [Accepted: 05/15/2023] [Indexed: 05/17/2023]
Abstract
Colloidal semiconductor II-VI metal chalcogenide (ME) magic-size clusters (MSCs) exhibit either an optical absorption singlet or doublet. In the latter case, a sharp photoluminescence (PL) signal is observed. Whether the PL-inactive MSCs transform to the PL-active ones is unknown. We show that PL-inactive CdS MSC-322 transforms to PL-active CdS MSC-328 and MSC-373 in the presence of acetic acid (HOAc). MSC-322 displays a sharp absorption at ~322 nm, whereas MSC-328 and MSC-373 both have broad absorptions respectively around 328 and 373 nm. In a reaction of cadmium myristate and S powder in 1-octadecene, MSC-322 develops; with HOAc, MSC-328 and MSC-373 are present. We propose that the MSCs evolve from their relatively transparent precursor compounds (PCs). The PC-322 to PC-328 quasi-isomerization involves monomer substitution, while monomer addition occurs for the PC-328 to PC-373 transformation. Our findings suggest that S dominates the precursor self-assembly quantitatively, and ligand-bonded Cd mainly controls MSC optical properties.
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Affiliation(s)
- Dongqing Wang
- Sichuan University, Engineering Research Center in Biomaterials, No. 24, South Section, First Ring Road, Chengdu, 610065, Chengdu, CHINA
| | - Yuehui Liu
- Sichuan University, Engineering Research Center in Biomaterials, 610065, Chengdu, CHINA
| | - Nelson Rowell
- National Research Council Canada, Metrology Research Centre, K1A 0R6, Ottawa, CANADA
| | - Shanling Wang
- Sichuan University, Analytical & Testing Center, 610065, Chengdu, CHINA
| | - Chunchun Zhang
- Sichuan University, Analytical & Testing Center, 610065, Chengdu, CHINA
| | - Meng Zhang
- Sichuan University, Institute of Atomic and Molecular Physics, 610065, Chengdu, CHINA
| | - Chaoran Luan
- Sichuan University, West China Hospital, 610065, Chengdu, CHINA
| | - Kui Yu
- Sichuan University, National Engineering Research Center for Biomaterials, No. 24, South Section, First Ring Road, Chengdu, 610065, Chengdu, CHINA
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Kalra S, Peyser R, Ho J, Babbin C, Bohan N, Cortes A, Erley J, Fatima M, Flinn J, Horwitz E, Hsu R, Lee W, Lu V, Narch A, Navas D, Okoroafor K, Ouanemalay E, Ross S, Sowole F, Specht E, Woo J, Yu K, Coolon JD. Genome-wide gene expression responses to experimental manipulation of Saccharomyces cerevisiae repressor activator protein 1 (Rap1) expression level. Genomics 2023; 115:110625. [PMID: 37068644 DOI: 10.1016/j.ygeno.2023.110625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 02/24/2023] [Accepted: 04/13/2023] [Indexed: 04/19/2023]
Abstract
Precise regulation of transcription in gene expression is critical for all aspects of normal organism form, fitness, and function and even minor alterations in the level, location, and timing of gene expression can result in phenotypic variation within and between species including evolutionary innovations and human disease states. Eukaryotic transcription is regulated by a complex interplay of multiple factors working both at a physical and molecular levels influencing this process. In Saccharomyces cerevisiae, the TF with the greatest number of putative regulatory targets is the essential gene Repressor Activator Protein 1 (RAP1). While much is known about the roles of Rap1 in gene regulation and numerous cellular processes, the response of Rap1 target genes to systematic titration of RAP1 expression level remains unknown. To fill this knowledge gap, we used a strain with a tetracycline-titratable promoter replacing wild-type regulatory sequences of RAP1 to systematically reduce the expression level of RAP1 and followed this with RNA sequencing (RNA-seq) to measure genome-wide gene expression responses. Previous research indicated that Rap1 plays a significant regulatory role in particular groups of genes including telomere-proximal genes, homothallic mating (HM) loci, glycolytic genes, DNA repair genes, and ribosomal protein genes; therefore, we focused our analyses on these groups and downstream targets to determine how they respond to reductions in RAP1 expression level. Overall, despite being known as both an activator and as a repressor of its target genes, we found that Rap1 acts as an activator for more target genes than as a repressor. Additionally, we found that Rap1 functions as an activator of ribosomal protein genes and a repressor of the silent mating locus genes consistent with predictions from the literature. Unexpectedly, we found that Rap1 functions as a repressor of glycolytic enzyme genes contrary to prior reports of it having the opposite effect. We also compared the expression of RAP1 to five different genes related to DNA repair pathway and found that decreasing RAP1 downregulated four of those five genes. Finally, we found no effect of RAP1 depletion on telomere-proximal genes despite its functioning to silence telomeric repeat-containing RNAs. Together our results enrich our understanding of this important transcriptional regulator. The graphical abstract is provided as a supplementary fig. (S-Fig 1).
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Affiliation(s)
- S Kalra
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - R Peyser
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - J Ho
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - C Babbin
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - N Bohan
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - A Cortes
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - J Erley
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - M Fatima
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - J Flinn
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - E Horwitz
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - R Hsu
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - W Lee
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - V Lu
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - A Narch
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - D Navas
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - K Okoroafor
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - E Ouanemalay
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - S Ross
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - F Sowole
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - E Specht
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - J Woo
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - K Yu
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America
| | - J D Coolon
- Department of Biology, Wesleyan University, Middletown, CT 06457, United States of America.
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Cheng D, Li J, Liu L, Yu K, Le TD, Liu J. Discovering Ancestral Instrumental Variables for Causal Inference From Observational Data. IEEE Trans Neural Netw Learn Syst 2023; PP:1-11. [PMID: 37018092 DOI: 10.1109/tnnls.2023.3262848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Instrumental variable (IV) is a powerful approach to inferring the causal effect of a treatment on an outcome of interest from observational data even when there exist latent confounders between the treatment and the outcome. However, existing IV methods require that an IV is selected and justified with domain knowledge. An invalid IV may lead to biased estimates. Hence, discovering a valid IV is critical to the applications of IV methods. In this article, we study and design a data-driven algorithm to discover valid IVs from data under mild assumptions. We develop the theory based on partial ancestral graphs (PAGs) to support the search for a set of candidate ancestral IVs (AIVs), and for each possible AIV, the identification of its conditioning set. Based on the theory, we propose a data-driven algorithm to discover a pair of IVs from data. The experiments on synthetic and real-world datasets show that the developed IV discovery algorithm estimates accurate estimates of causal effects in comparison with the state-of-the-art IV-based causal effect estimators.
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22
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Ju Y, Liu K, Ma G, Zhu B, Wang H, Hu Z, Zhao J, Zhang L, Cui K, He XR, Huang M, Li Y, Xu S, Gao Y, Liu K, Liu H, Zhuo Z, Zhang G, Guo Z, Ye Y, Zhang L, Zhou X, Ma S, Qiu Y, Zhang M, Tao Y, Zhang M, Xian L, Xie W, Wang G, Wang Y, Wang C, Wang DH, Yu K. Bacterial antibiotic resistance among cancer inpatients in China: 2016-20. QJM 2023; 116:213-220. [PMID: 36269193 DOI: 10.1093/qjmed/hcac244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 09/16/2022] [Accepted: 10/10/2022] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND The incidence of infections among cancer patients is as high as 23.2-33.2% in China. However, the lack of information and data on the number of antibiotics used by cancer patients is an obstacle to implementing antibiotic management plans. AIM This study aimed to investigate bacterial infections and antibiotic resistance in Chinese cancer patients to provide a reference for the rational use of antibiotics. DESIGN This was a 5-year retrospective study on the antibiotic resistance of cancer patients. METHODS In this 5-year surveillance study, we collected bacterial and antibiotic resistance data from 20 provincial cancer diagnosis and treatment centers and three specialized cancer hospitals in China. We analyzed the resistance of common bacteria to antibiotics, compared to common clinical drug-resistant bacteria, evaluated the evolution of critical drug-resistant bacteria and conducted data analysis. FINDINGS Between 2016 and 2020, 216 219 bacterial strains were clinically isolated. The resistance trend of Escherichia coli and Klebsiella pneumoniae to amikacin, ciprofloxacin, cefotaxime, piperacillin/tazobactam and imipenem was relatively stable and did not significantly increase over time. The resistance of Pseudomonas aeruginosa strains to all antibiotics tested, including imipenem and meropenem, decreased over time. In contrast, the resistance of Acinetobacter baumannii strains to carbapenems increased from 4.7% to 14.7%. Methicillin-resistant Staphylococcus aureus (MRSA) significantly decreased from 65.2% in 2016 to 48.9% in 2020. CONCLUSIONS The bacterial prevalence and antibiotic resistance rates of E. coli, K. pneumoniae, P. aeruginosa, A. baumannii, S. aureus and MRSA were significantly lower than the national average.
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Affiliation(s)
- Y Ju
- From the Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin, China
| | - K Liu
- Department of Critical Care Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - G Ma
- Department of Critical Care Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - B Zhu
- Department of Critical Care Medicine, Fudan University Shanghai Cancer Center, Shanghai, China
| | - H Wang
- Department of Critical Care Medicine, Peking University Cancer Hospital & Institute, Beijing, China
| | - Z Hu
- Department of Critical Care Medicine, Hebei Tumor Hospital, Shijiazhuang, China
| | - J Zhao
- Department of Critical Care Medicine, Hunan Cancer Hospital, Changsha, China
| | - L Zhang
- Department of Critical Care Medicine, Hubei Cancer Hospital, Wuhan, China
| | - K Cui
- Department of Critical Care Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - X-R He
- Department of Critical Care Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - M Huang
- Department of Critical Care Medicine, Shanxi Tumor Hospital, Taiyuan, China
| | - Y Li
- Department of Critical Care Medicine, Guangxi Medical University Cancer Hospital, Nanning, China
| | - S Xu
- Department of Critical Care Medicine, Sichuan Cancer Hospital, Chengdu, China
| | - Y Gao
- Department of Critical Care Medicine, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, China
| | - K Liu
- Department of Critical Care Medicine, Zhejiang Cancer Hospital, Hangzhou, China
| | - H Liu
- From the Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin, China
| | - Z Zhuo
- From the Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin, China
| | - G Zhang
- Department of Critical Care Medicine, Jilin Tumor Hospital, Changchun, China
| | - Z Guo
- Department of Critical Care Medicine, Shandong Cancer Hospital and Institute, Shandong, China
| | - Y Ye
- Department of Critical Care Medicine, Fujian Cancer Hospital, Fuzhou, China
| | - L Zhang
- Department of Critical Care Medicine, Anhui Provincial Cancer Hospital, Hefei, China
| | - X Zhou
- Department of Critical Care Medicine, Gansu Provincial Cancer Hospital, Lanzhou, China
| | - S Ma
- Department of Critical Care Medicine, Jiangsu Cancer Hospital, Nanjing, China
| | - Y Qiu
- Department of Critical Care Medicine, Jiangxi Cancer Hospital, Nanchang, China
| | - M Zhang
- Department of Critical Care Medicine, Hangzhou Cancer Hospital, Hangzhou, China
| | - Y Tao
- Department of Critical Care Medicine, Nantong Tumor Hospital, Nantong, China
| | - M Zhang
- Department of Critical Care Medicine, Baotou Cancer Hospital, Baotou, China
| | - L Xian
- Department of Critical Care Medicine, Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China
| | - W Xie
- Department of Critical Care Medicine, The Affiliated Cancer Hospital of Guizhou Medical University, Guiyang, China
| | - G Wang
- Department of Critical Care Medicine, The First Hospital of Jilin University, Changchun, China
| | - Y Wang
- Department of Critical Care Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - C Wang
- From the Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin, China
| | - D-H Wang
- Department of Critical Care Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - K Yu
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, China
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Yang Y, Shen Q, Zhang C, Rowell N, Zhang M, Chen X, Luan C, Yu K. Direct and Indirect Pathways of CdTeSe Magic-Size Cluster Isomerization Induced by Surface Ligands at Room Temperature. ACS Cent Sci 2023; 9:519-530. [PMID: 36968545 PMCID: PMC10037450 DOI: 10.1021/acscentsci.2c01394] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Indexed: 06/18/2023]
Abstract
The field of isomerization reactions for colloidal semiconductor magic-size clusters (MSCs) remains largely unexplored. Here, we show that MSCs isomerize via two fundamental pathways that are regulated by the acidity and amount of an incoming ligand, with CdTeSe as the model system. When MSC-399 isomerizes to MSC-422 at room temperature, the peak red-shift from 399 to 422 nm is continuous (pathway 1) and/or stepwise (pathway 2) as monitored in situ and in real time by optical absorption spectroscopy. We propose that pathway 1 is direct, with intracluster configuration changes and a relatively large energy barrier. Pathway 2 is indirect, assisted by the MSC precursor compounds (PCs), from MSC-399 to PC-399 to PC-422 to MSC-422. Pathway 1 is activated when PC-422 to MSC-422 is suppressed. Our findings unambiguously suggest that when a change occurs directly on a nanospecies, its absorption peak continuously shifts. The present study provides an in-depth understanding of the transformative behavior of MSCs via ligand-induced isomerization upon external chemical stimuli.
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Affiliation(s)
- Yusha Yang
- Engineering
Research Center in Biomaterials, Sichuan
University, Chengdu, Sichuan 610065, P. R. China
| | - Qiu Shen
- Engineering
Research Center in Biomaterials, Sichuan
University, Chengdu, Sichuan 610065, P. R. China
| | - Chunchun Zhang
- Analytical
& Testing Center, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Nelson Rowell
- Metrology
Research Centre, National Research Council
Canada, Ottawa, Ontario K1A 0R6, Canada
| | - Meng Zhang
- Institute
of Atomic and Molecular Physics, Sichuan
University, Chengdu, Sichuan 610065, P. R. China
| | - Xiaoqin Chen
- Engineering
Research Center in Biomaterials, Sichuan
University, Chengdu, Sichuan 610065, P. R. China
| | - Chaoran Luan
- Laboratory
of Ethnopharmacology, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Kui Yu
- Engineering
Research Center in Biomaterials, Sichuan
University, Chengdu, Sichuan 610065, P. R. China
- Institute
of Atomic and Molecular Physics, Sichuan
University, Chengdu, Sichuan 610065, P. R. China
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24
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Robotka H, Thomas L, Yu K, Wood W, Elie JE, Gahr M, Theunissen FE. Sparse ensemble neural code for a complete vocal repertoire. Cell Rep 2023; 42:112034. [PMID: 36696266 PMCID: PMC10363576 DOI: 10.1016/j.celrep.2023.112034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 08/08/2022] [Accepted: 01/09/2023] [Indexed: 01/26/2023] Open
Abstract
The categorization of animal vocalizations into distinct behaviorally relevant groups for communication is an essential operation that must be performed by the auditory system. This auditory object recognition is a difficult task that requires selectivity to the group identifying acoustic features and invariance to renditions within each group. We find that small ensembles of auditory neurons in the forebrain of a social songbird can code the bird's entire vocal repertoire (∼10 call types). Ensemble neural discrimination is not, however, correlated with single unit selectivity, but instead with how well the joint single unit tunings to characteristic spectro-temporal modulations span the acoustic subspace optimized for the discrimination of call types. Thus, akin to face recognition in the visual system, call type recognition in the auditory system is based on a sparse code representing a small number of high-level features and not on highly selective grandmother neurons.
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Affiliation(s)
- H Robotka
- Max Planck Institute for Ornithology, Seewiesen, Germany
| | - L Thomas
- University of California, Berkeley, Helen Wills Neuroscience Institute, Berkeley, CA, USA
| | - K Yu
- University of California, Berkeley, Helen Wills Neuroscience Institute, Berkeley, CA, USA
| | - W Wood
- University of California, Berkeley, Helen Wills Neuroscience Institute, Berkeley, CA, USA
| | - J E Elie
- University of California, Berkeley, Helen Wills Neuroscience Institute, Berkeley, CA, USA
| | - M Gahr
- Max Planck Institute for Ornithology, Seewiesen, Germany
| | - F E Theunissen
- Max Planck Institute for Ornithology, Seewiesen, Germany; University of California, Berkeley, Helen Wills Neuroscience Institute, Berkeley, CA, USA; Department of Psychology and Integrative Biology, University of California, Berkeley, Berkeley, CA, USA.
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25
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Tan L, Yang J, Yang J, Yang Z, Yu K. Impact of prior failed irrigation and debridement on outcomes of subsequent two-stage revision arthroplasty: a systematic review and meta-analysis. Eur Rev Med Pharmacol Sci 2022; 26:9195-9203. [PMID: 36591831 DOI: 10.26355/eurrev_202212_30672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVE This study aimed at examining if prior failed debridement, antibiotics, and implant retention (DAIR) for prosthetic joint infection have an impact on the success of subsequent two-stage revision arthroplasty (2SRA). MATERIALS AND METHODS Search was conducted on PubMed, Embase, and Google Scholar up to 14th April 2022 for studies comparing 2SRA with and without a history of DAIR. RESULTS Six retrospective studies were included. The success of 2SRA was defined as either absence of additional surgical intervention for infection or absence of antibiotic suppression or both. We noted no statistically significant difference in the odds of success between failed DAIR and no DAIR group, albeit with an inclination of reduced success with prior failed DAIR (OR 0.63 95% CI 0.33, 1.19 I2=66% p=0.16). Five studies reported adjusted outcomes. The meta-analysis demonstrated no statistically significant difference in the odds of success between failed DAIR and no DAIR groups (OR 0.57 95% CI 0.26, 1.26 I2=66% p=0.17). During sensitivity analysis, the removal of a single study changed the effect size indicating significantly lower success rates in failed DAIR group. CONCLUSIONS Our results indicate that patients undergoing 2SRA after failed DAIR may have a non-significant tendency of lower success rates as compared to patients directly undergoing 2SRA. However, current evidence is scarce and fraught with several limitations and there is a need for further research to delineate the impact of failed DAIR on the success of 2SRA.
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Affiliation(s)
- L Tan
- Department of Orthopedics, Tianjin Fifth Central Hospital, Tianjin, China.
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26
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Wang Y, Cui K, Li X, Gao Y, Hu Z, Wang H, Ma G, Zhu B, Wang D, Wang C, Yu K. Current census of oncology critical care medicine in China. QJM 2022; 115:745-752. [PMID: 35438153 DOI: 10.1093/qjmed/hcac104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 04/06/2022] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVE The purposes of this survey were to show the current situation of oncology critical care medicine in China by questionnaire, to understand the resource distribution of oncology critical care medicine and to analyze and evaluate the existing resources and reserve capacity of oncology critical care medicine in China. METHODS We conducted the survey mainly in the form of an online questionnaire. The Committee of Cancer Critical Care Medicine of the Chinese Anticancer Association (CACA) initiated the survey on 1 November 2017, and 36 member hospitals nationwide participated in the survey. The questionnaire included 10 items: investigator information, hospital information, general information of oncology critical care department, staffing of oncology critical care department, management in oncology critical care department, technical skills in oncology critical care department, patient source in oncology critical care department, equipment configuration in oncology critical care department, special skills in oncology critical care department and summary of the information. RESULTS The survey results included information from 28 member units, all of which were tertiary hospitals, distributed in 20 provinces and 4 direct-controlled municipalities. The results are as follows. (i) The total ratio of beds in the oncology critical care department to hospital beds was 1.06%, and the average number of beds in the oncology critical care department was 16.36. (ii) The ratio of physicians in the oncology critical care department to beds was ∼0.62:1, and the ratio of nurses to beds was ∼1.98:1. (iii) According to the census of the population and gross domestic product (GDP) of different regions conducted by the State Statistics Bureau in 2017, the ratio of beds in the oncology critical care department for tumor patients to the population was 4.55 beds per 10 million people, and the ratio of beds in the oncology critical care department to GDP was 8.00 beds per RMB 100 billion, on average. (iv) According to the requirements of the guidelines for the development and management of critical care medicine in China, the facilities in departments of oncology critical care medicine meet the requirements, and the technical skills of medical staff are competent. CONCLUSION The development of oncology critical care in China is becoming better, but there is still a certain gap compared with the intensive care unit standards in China and the average level of the nationwide. The development of oncology critical care medicine is urgent.
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Affiliation(s)
- Y Wang
- From the Department of Critical Care Medicine, Harbin Medical University Cancer Hospital
| | - K Cui
- Department of Critical Care Medicine, Tianjin Medical University Cancer Institute and Hospital
| | - X Li
- From the Department of Critical Care Medicine, Harbin Medical University Cancer Hospital
| | - Y Gao
- Department of Critical Care Medicine, The Fourth Affiliated Hospital of Harbin Medical University
| | - Z Hu
- Department of Critical Care Medicine, The Fourth Hospital of Hebei Medical University
| | - H Wang
- Department of Critical Care Medicine, Peking University Cancer Hospital
| | - G Ma
- Department of Critical Care Medicine, Cancer Center of Sun Yat-sen University
| | - B Zhu
- Department of Critical Care Medicine, Fudan University Cancer Hospital
| | - D Wang
- Department of Critical Care Medicine, Tianjin Medical University Cancer Institute and Hospital
| | - C Wang
- From the Department of Critical Care Medicine, Harbin Medical University Cancer Hospital
| | - K Yu
- From the Department of Critical Care Medicine, Harbin Medical University Cancer Hospital
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, No. 23 Youzheng Street, Nangang District, Harbin 150081, China
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He L, Luan C, Liu S, Chen M, Rowell N, Wang Z, Li Y, Zhang C, Lu J, Zhang M, Liang B, Yu K. Transformations of Magic-Size Clusters via Precursor Compound Cation Exchange at Room Temperature. J Am Chem Soc 2022; 144:19060-19069. [PMID: 36215103 DOI: 10.1021/jacs.2c07972] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The transformation of colloidal semiconductor magic-size clusters (MSCs) from zinc to cadmium chalcogenide (ZnE to CdE) at low temperatures has received scant attention. Here, we report the first room-temperature evolution of CdE MSCs from ZnE samples and our interpretation of the transformation pathway. We show that when prenucleation stage samples of ZnE are mixed with cadmium oleate (Cd(OA)2), CdE MSCs evolve; without this mixing, ZnE MSCs develop. When ZnE MSCs and Cd(OA)2 are mixed, CdE MSCs also form. We propose that Cd(OA)2 reacts with the precursor compounds (PCs) of the ZnE MSCs but not directly with the ZnE MSCs. The cation exchange reaction transforms the ZnE PCs into CdE PCs, from which CdE MSCs develop. Our findings suggest that in reactions that lead to the production of binary ME quantum dots, the E precursor dominates the formation of binary ME PCs (M = Zn or Cd) to have similar stoichiometry. The present study provides a much more profound view of the formation and transformation mechanisms of the ME PCs.
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Affiliation(s)
- Li He
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Chaoran Luan
- Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Shangpu Liu
- College of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Meng Chen
- College of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Nelson Rowell
- Metrology Research Centre, National Research Council Canada, Ottawa, Ontario K1A 0R6, Canada
| | - Ze Wang
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Yang Li
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Chunchun Zhang
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Jiao Lu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Meng Zhang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Bin Liang
- College of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Kui Yu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, Sichuan 610065, P. R. China.,Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, P. R. China
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Li WL, Tong SG, Yang ZY, Xiao YQ, Lv XC, Weng Q, Yu K, Liu GR, Luo XQ, Wei T, Han JZ, Ai LZ, Ni L. The dynamics of microbial community and flavor metabolites during the acetic acid fermentation of Hongqu aromatic vinegar. Curr Res Food Sci 2022; 5:1720-1731. [PMID: 36238813 PMCID: PMC9550536 DOI: 10.1016/j.crfs.2022.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 09/02/2022] [Accepted: 10/02/2022] [Indexed: 11/05/2022] Open
Abstract
In this study, we investigated the dynamics of microbial community and flavor metabolites during the traditional fermentation of Hongqu aromatic vinegar (HAV) and subsequently explored the potential relationship between microbiota and flavor metabolites. The microbiome analysis based on high-throughput sequencing (HTS) of amplicons demonstrated that Lactobacillus, Acetobacter and Clostridium were the dominant bacterial genera, while Alternaria, Candida, Aspergillus and Issatchenkia were the dominant fungal genera during the acetic acid fermentation (AAF) of HAV. A total of 101 volatile flavor compounds were identified through gas chromatography-mass spectrometry (GC-MS) during HAV fermentation, including esters (35), alcohols (17), aldehydes (11), acids (11), ketones (7), phenols (10), and others (10). Redundancy analysis (RDA) was used to reveal the correlation between microbiota and volatile flavor compounds. Lactobacillus and Acetobacter were the two bacterial genera that have the great influence on the production of volatile flavor components in HAV. Among them, Lactobacillus was positively correlated with a variety of ethyl esters, while Acetobacter positively contributed to the formation of several organic acids. Furthermore, the non-volatile metabolites were detected by ultra-high-performance liquid chromatography with quadrupole time-of-flight mass spectrometry (UPLC-QTOF/MS). A total of 41 dipeptides were identified during HAV fermentation, and most of them may have sensory characteristics and biological activities. RDA showed that Aspergillus, Epicoccum, Issatchenkia, Candida and Malassezia were the most influential fungal genera on non-volatile metabolites. In particular, Epicoccum was first reported in Hongqu vinegar and showed a positive correlation with the production of various organic acids. In conclusion, this study provides a scientific basis for understanding the flavor generation mechanism of HAV, and may be valuable for developing effective techniques to select suitable strains to improve the flavor quality of HAV. Microbial community in Hongqu aromatic vinegar was investigated by high-throughput sequencing. The key flavor metabolites during the acetic acid fermentation of HAV were selected through PLS-DA. Lactobacillus, Acetobacter and Clostridium were the predominant bacterial genera in HAV fermentation. Alternaria, Candida, Aspergillus and Issatchenkia were the predominant fungal genera in HAV fermentation. Redundancy analysis (RDA) revealed the correlation between microbiota and flavor metabolites.
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Affiliation(s)
- Wen-Long Li
- Food Nutrition and Health Research Center, School of Advanced Manufacturing, Fuzhou University, Jinjiang, Fujian, 362200, PR China
- Institute of Food Science and Technology, College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, PR China
| | - Shan-Gong Tong
- Institute of Food Science and Technology, College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, PR China
| | - Zi-Yi Yang
- Food Nutrition and Health Research Center, School of Advanced Manufacturing, Fuzhou University, Jinjiang, Fujian, 362200, PR China
- Institute of Food Science and Technology, College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, PR China
| | - Yan-Qin Xiao
- Institute of Food Science and Technology, College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, PR China
| | - Xu-Cong Lv
- Food Nutrition and Health Research Center, School of Advanced Manufacturing, Fuzhou University, Jinjiang, Fujian, 362200, PR China
- Institute of Food Science and Technology, College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, PR China
- Corresponding author. Food Nutrition and Health Research Center, School of Advanced Manufacturing, Fuzhou University, Jinjiang, Fujian, 362200, PR China.
| | - Qi Weng
- Fujian Salt Industry Group Co., Ltd., Fuzhou, Fujian, 350001, PR China
| | - Kui Yu
- Fujian Salt Industry Group Co., Ltd., Fuzhou, Fujian, 350001, PR China
| | - Gui-Rong Liu
- Fujian Minyan Food Technology Co., Ltd., Sanming, Fujian, 365500, PR China
| | - Xiao-Qing Luo
- Fujian Salt Industry Group Co., Ltd., Fuzhou, Fujian, 350001, PR China
| | - Tao Wei
- Fujian Salt Industry Group Co., Ltd., Fuzhou, Fujian, 350001, PR China
| | - Jin-Zhi Han
- Food Nutrition and Health Research Center, School of Advanced Manufacturing, Fuzhou University, Jinjiang, Fujian, 362200, PR China
- Institute of Food Science and Technology, College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, PR China
- Corresponding author. Food Nutrition and Health Research Center, School of Advanced Manufacturing, Fuzhou University, Jinjiang, Fujian, 362200, PR China.
| | - Lian-Zhong Ai
- School of Medical Instruments and Food Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, PR China
| | - Li Ni
- Food Nutrition and Health Research Center, School of Advanced Manufacturing, Fuzhou University, Jinjiang, Fujian, 362200, PR China
- Institute of Food Science and Technology, College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, PR China
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Keane F, Park W, Varghese A, Balogun F, Yu K, El Dika I, Khalil D, Kelsen D, Reidy-Lagunes D, Ku G, Raj N, Chou J, Capanu M, Schultz N, Yaeger R, O'Reilly E. 1304P Characterizing the clinico-genomic landscape and outcomes of KRAS G12C mutated pancreas cancer. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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30
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Wan G, DeSimone M, Liu F, Nguyen N, Leung B, Choi M, Bruce A, Stagner A, Lian C, Russell-Goldman E, Jiao M, Zhen D, Zhao J, Gil J, Németh I, Marko-Varga G, Kwatra S, Yu K, Semenov Y. 649 CNN-based histopathology image analysis for early-stage melanoma recurrence. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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31
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Yu Z, Gehad A, Teague J, Crouch J, Yu K, O'Malley J, Kupper T, Benezeder T, Gudjonsson J, Kahlenberg J, Sarkar M, Vieyra-Garcia P, Wolf P, Clark R. 605 Phototherapy-induced IFNκ drives type I IFN induced anticancer responses in CTCL. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Abstract
Domain adaptation aims to facilitate the learning task in an unlabeled target domain by leveraging the auxiliary knowledge in a well-labeled source domain from a different distribution. Almost existing autoencoder-based domain adaptation approaches focus on learning domain-invariant representations to reduce the distribution discrepancy between source and target domains. However, there is still a weakness existing in these approaches: the class-discriminative information of the two domains may be damaged while aligning the distributions of the source and target domains, which makes the samples with different classes close to each other, leading to performance degradation. To tackle this issue, we propose a novel dual-representation autoencoder (DRAE) to learn dual-domain-invariant representations for domain adaptation. Specifically, DRAE consists of three learning phases. First, DRAE learns global representations of all source and target data to maximize the interclass distance in each domain and minimize the marginal distribution and conditional distribution of both domains simultaneously. Second, DRAE extracts local representations of instances sharing the same label in both domains to maintain class-discriminative information in each class. Finally, DRAE constructs dual representations by aligning the global and local representations with different weights. Using three text and two image datasets and 12 state-of-the-art domain adaptation methods, the extensive experiments have demonstrated the effectiveness of DRAE.
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33
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Li Y, Zhang M, He L, Rowell N, Kreouzis T, Zhang C, Wang S, Luan C, Chen X, Zhang S, Yu K. Manipulating Reaction Intermediates to Aqueous-Phase ZnSe Magic-Size Clusters and Quantum Dots at Room Temperature. Angew Chem Int Ed Engl 2022; 61:e202209615. [PMID: 35909255 DOI: 10.1002/anie.202209615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Indexed: 02/05/2023]
Abstract
It is not resolved which model describes better the aqueous-phase nucleation and growth of semiconductor quantum dots (QDs), the classical one-step one or the nonclassical multi-step one. Here, we design a room-temperature reaction to trap reaction intermediates in the prenucleation stage of ZnSe QDs (as a model system). We show that the trapped intermediate can transform to magic-size clusters (MSCs) via intra-molecular reorganization and can fragment to enable the growth of QDs. The MSCs exhibit a sharp optical absorption peaking at 299 nm, labelled MSC-299. The intermediate, the precursor compound (PC-299) of MSC-299, is optically transparent at 299 nm and to longer wavelengths. This intermediate forms in various Zn and Se reaction systems. The present study provides unambiguous evidence that the nonclassical and classical pathways are both necessary to explain the nucleation and growth of aqueous-phase QDs, with the former pathway favored more by high reaction concentrations.
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Affiliation(s)
- Yang Li
- Sichuan University, College of Biomedical Engineering, CHINA
| | - Meng Zhang
- Sichuan University, School of Physical and Chemical Sciences, CHINA
| | - Li He
- Sichuan University, College of Biomedical Engineering, CHINA
| | - Nelson Rowell
- National Research Council Canada, Metrology Research Centre, CANADA
| | - Theo Kreouzis
- Queen Mary University of London, School of Physical and Chemical Sciences, UNITED KINGDOM
| | | | - Shanlin Wang
- Sichuan University, Analytical & Testing Center, CHINA
| | - Chaoran Luan
- West China School of Medicine: Sichuan University West China Hospital, Laboratory of Ethnopharmacology, CHINA
| | - Xiaoqin Chen
- Sichuan University, College of Biomedical Engineering, CHINA
| | - Sijie Zhang
- Guizhou University of Engineering Science, , CHINA
| | - Kui Yu
- Sichuan University, National Engineering Research Center for Biomaterials, No. 24, South Section, First Ring Road, Chengdu, 610065, Chengdu, CHINA
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Li Y, Zhang M, He L, Rowell N, Kreouzis T, Zhang C, Wang S, Luan C, Chen X, Zhang S, Yu K. Manipulating Reaction Intermediates to Aqueous‐Phase ZnSe Magic‐Size Clusters and Quantum Dots at Room Temperature. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202209615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Yang Li
- Sichuan University College of Biomedical Engineering CHINA
| | - Meng Zhang
- Sichuan University School of Physical and Chemical Sciences CHINA
| | - Li He
- Sichuan University College of Biomedical Engineering CHINA
| | - Nelson Rowell
- National Research Council Canada Metrology Research Centre CANADA
| | - Theo Kreouzis
- Queen Mary University of London School of Physical and Chemical Sciences UNITED KINGDOM
| | | | - Shanlin Wang
- Sichuan University Analytical & Testing Center CHINA
| | - Chaoran Luan
- West China School of Medicine: Sichuan University West China Hospital Laboratory of Ethnopharmacology CHINA
| | - Xiaoqin Chen
- Sichuan University College of Biomedical Engineering CHINA
| | - Sijie Zhang
- Guizhou University of Engineering Science CHINA
| | - Kui Yu
- Sichuan University National Engineering Research Center for Biomaterials No. 24, South Section, First Ring Road, Chengdu 610065 Chengdu CHINA
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35
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Zhang L, Miao S, Yang Z, Li Z, Fan Y, Yu K, Huang K, Huang Q, Xia X. [Suppression of HMGB1 inhibits neuronal autophagy and apoptosis to improve neurological deficits in rats following intracerebral hemorrhage]. Nan Fang Yi Ke Da Xue Xue Bao 2022; 42:1050-1056. [PMID: 35869769 DOI: 10.12122/j.issn.1673-4254.2022.07.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To investigate the effect of suppressing high-mobility group box 1 (HMGB1) on neuronal autophagy and apoptosis in rats after intracerebral hemorrhage (ICH) in rats. METHODS Rat models of ICH induced by intracerebral striatum injection of 0.2 U/mL collagenase Ⅳ were treated with 1 mg/kg anti-HMGB1 mAb or a control anti-IgG mAb injected via the tail immediately and at 6 h after the operation (n=5). The rats in the sham-operated group (with intracranial injection of 2 μL normal saline) and ICH model group (n=5) were treated with PBS in the same manner after the operation. The neurological deficits of the rats were evaluated using modified neurological severity score (mNSS). TUNEL staining was used to detect apoptosis of the striatal neurons, and the expressions of HMGB1, autophagy-related proteins (Beclin-1, LC3-Ⅱ and LC3-Ⅰ) and apoptosis-related proteins (Bcl-2, Bax and cleaved caspase-3) in the brain tissues surrounding the hematoma were detected using Western blotting. The expression of HMGB1 in the striatum was detected by immunohistochemistry, and serum level of HMGB1 was detected with ELISA. RESULTS The rat models of ICH showed significantly increased mNSS (P < 0.05), which was markedly lowered after treatment with anti- HMGB1 mAb (P < 0.05). ICH caused a significant increase of apoptosis of the striatal neurons (P < 0.05), enhanced the expressions of beclin-1, LC3-Ⅱ, Bax and cleaved caspase-3 (P < 0.05), lowered the expressions of LC3-Ⅰ and Bcl-2 (P < 0.05), and increased the content of HMGB1 (P < 0.05). Treatment with anti-HMGB1 mAb obviously lowered the apoptosis rate of the striatal neurons (P < 0.05), decreased the expressions of Beclin-1, LC3-Ⅱ, Bax and cleaved caspase-3 (P < 0.05), increased the expressions of LC3-Ⅰ and Bcl-2 (P < 0.05), and reduced the content of HMGB1 in ICH rats (P < 0.05). CONCLUSION Down- regulation of HMGB1 by anti-HMGB1 improves neurological functions of rats after ICH possibly by inhibiting autophagy and apoptosis of the neurons.
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Affiliation(s)
- L Zhang
- Collaborative Innovation Center of Sichuan for Elderly Care and Health, Chengdu Medical College, Chengdu 610500, China.,Department of Neurosurgery, First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China
| | - S Miao
- Department of Neurosurgery, First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China
| | - Z Yang
- Department of Neurosurgery, First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China
| | - Z Li
- Department of Neurosurgery, First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China
| | - Y Fan
- Department of Neurosurgery, First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China
| | - K Yu
- Department of Neurosurgery, First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China
| | - K Huang
- Department of Neurosurgery, First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China
| | - Q Huang
- Department of Information, First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China
| | - X Xia
- Department of Neurosurgery, First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China
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Luan C, Shen Q, Rowell N, Zhang M, Chen X, Huang W, Yu K. A Real‐Time In‐situ Demonstration of Direct and Indirect Transformation Pathways in CdTe Magic‐size Clusters at Room Temperature. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Chaoran Luan
- Sichuan University Laboratory of Ethnopharmacology, West China School of Medicine, West China Hospital CHINA
| | - Qiu Shen
- Sichuan University National Engineering Research Center for Biomaterials, College of Biomedical Engineering CHINA
| | - Nelson Rowell
- National Research Council Canada Metrology Research Centre CANADA
| | - Meng Zhang
- Sichuan University Institute of Atomic and Molecular Physics CHINA
| | - Xiaoqin Chen
- Sichuan University National Engineering Research Center for Biomaterials, College of Biomedical Engineering CHINA
| | - Wen Huang
- Sichuan University Laboratory of Ethnopharmacology, West China School of Medicine, West China Hospital CHINA
| | - Kui Yu
- Sichuan University National Engineering Research Center for Biomaterials No. 24, South Section, First Ring Road, Chengdu 610065 Chengdu CHINA
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Luan C, Shen Q, Rowell N, Zhang M, Chen X, Huang W, Yu K. A Real-Time In Situ Demonstration of Direct and Indirect Transformation Pathways in CdTe Magic-Size Clusters at Room Temperature. Angew Chem Int Ed Engl 2022; 61:e202205784. [PMID: 35794715 DOI: 10.1002/anie.202205784] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Indexed: 02/05/2023]
Abstract
The transformations of colloidal semiconductor magic-size clusters (MSCs) are expected to occur with only discrete, step-wise redshifts in optical absorption. Here, we challenge this assumption presenting a novel, conceptually different transformation, for which the redshift is continuous. In the room-temperature transformation from CdTe MSC-448 to MSC-488 (designated by the peak wavelengths in nanometer), the redshift of absorption monitored in situ displays distinctly continuous and/or step-wise behavior. Based on conclusive evidence provided by real-time experiments, the former transformation is apparently direct and intra-cluster with a relatively large energy barrier. The latter transformation is indirect and assisted by MSC precursor compounds (PCs). The former transformation follows the latter often, being predominant at a relatively high temperature. The present findings encourage a reconsideration of the absorption redshift reported previously for transformations of binary II-VI MSCs, together with the pathway associated without the increase of cluster mass.
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Affiliation(s)
- Chaoran Luan
- Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, 610065, P. R. China
| | - Qiu Shen
- National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan, 610065, P. R. China
| | - Nelson Rowell
- Metrology Research Centre, National Research Council Canada, Ontario, K1A 0R6, Canada
| | - Meng Zhang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan, 610065, P. R. China
| | - Xiaoqin Chen
- National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan, 610065, P. R. China
| | - Wen Huang
- Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, 610065, P. R. China
| | - Kui Yu
- National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan, 610065, P. R. China.,Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan, 610065, P. R. China
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38
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Abstract
Causal feature selection methods aim to identify a Markov boundary (MB) of a class variable, and almost all the existing causal feature selection algorithms use conditional independence (CI) tests to learn the MB. However, in real-world applications, due to data issues (e.g., noisy or small samples), CI tests can be unreliable; thus, causal feature selection algorithms relying on CI tests encounter two types of errors: false positives (i.e., selecting false MB features) and false negatives (i.e., discarding true MB features). Existing algorithms only tackle either false positives or false negatives, and they cannot deal with both types of errors at the same time, leading to unsatisfactory results. To address this issue, we propose a dual-correction-strategy-based MB learning (DCMB) algorithm to correct the two types of errors simultaneously. Specifically, DCMB selectively removes false positives from the MB features currently selected, while selectively retrieving false negatives from the features currently discarded. To automatically determine the optimal number of selected features for the selective removal and retrieval in the dual correction strategy, we design the simulated-annealing-based DCMB (SA-DCMB) algorithm. Using benchmark Bayesian network (BN) datasets, the experimental results demonstrate that DCMB achieves substantial improvements on the MB learning accuracy compared with the existing MB learning methods. Empirical studies in real-world datasets validate the effectiveness of SA-DCMB for classification against state-of-the-art causal and traditional feature selection algorithms.
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Yu K, Faye AS, Wen T, Guglielminotti JR, Huang Y, Wright JD, D'Alton ME, Friedman AM. Outcomes during delivery hospitalisations with inflammatory bowel disease. BJOG 2022; 129:1073-1083. [PMID: 35152548 DOI: 10.1111/1471-0528.17039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 10/22/2021] [Accepted: 11/05/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To characterise inflammatory bowel disease (IBD) trends and associated risk during delivery hospitalisations. DESIGN Cross-sectional. SETTING US delivery hospitalisations. POPULATION Delivery hospitalisations in the 2000-2018 National Inpatient Sample. METHODS This study analysed a nationally representative hospital discharge database based on the presence of IBD. Temporal trends in IBD were analysed using joinpoint regression to estimate the average annual percent change (AAPC). IBD severity was characterised by the presence of diagnoses such as penetrating and stricturing disease and history of bowel resection. Risks for adverse outcomes were analysed based on presence of IBD. Poisson regression models were performed with unadjusted and adjusted risk ratios (aRR) as measures of effect. MAIN OUTCOME MEASURE Prevalence of IBD and associated adverse outcomes. RESULTS Of 73 109 790 delivery hospitalisations, 89 965 had a diagnosis of IBD. IBD rose from 0.06% in 2000 to 0.21% in 2018 (AAPC 7.3%, 95% CI 6.7-7.9%). Among deliveries with IBD, IBD severity diagnoses increased from 4.1% to 8.1% from 2000 to 2018. In adjusted analysis, IBD was associated with increased risk for preterm delivery (aRR 1.50, 95% CI 1.47-1.53), severe maternal morbidity (aRR 1.93, 95% CI 1.83-2.04), venous thrombo-embolism (aRR 2.76, 95% CI 2.39-3.18) and surgical injury during caesarean delivery hospitalisation (aRR 5.03, 95% CI 4.76-5.31). In the presence of a severe IBD diagnosis, risk was further increased for all adverse outcomes. CONCLUSION IBD is increasing in the obstetric population and is associated with adverse outcomes. Risk is increased in the presence of a severe IBD diagnosis. TWEETABLE ABSTRACT Deliveries among women with inflammatory bowel disease are increasing. Disease severity is associated with adverse outcomes.
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Affiliation(s)
- K Yu
- Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - A S Faye
- Department of Medicine, Dr. Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Division of Gastroenterology, Department of Medicine, NYU Grossman School of Medicine, Inflammatory Bowel Disease Center, NYU Langone Health, New York, NY, USA
| | - T Wen
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California-San Francisco, San Francisco, CA, USA
| | | | - Y Huang
- Department of Obstetrics and Gynecology, Columbia University, New York, NY, USA
| | - J D Wright
- Department of Obstetrics and Gynecology, Columbia University, New York, NY, USA
| | - M E D'Alton
- Department of Obstetrics and Gynecology, Columbia University, New York, NY, USA
| | - A M Friedman
- Department of Obstetrics and Gynecology, Columbia University, New York, NY, USA
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Zhang Y, Cao Z, Zhang H, Luan C, Chen X, Li Y, Yang Y, Li Y, Zeng J, Yu K. Room-Temperature Evolution of Ternary CdTeS Magic-Size Clusters Exhibiting Sharp Absorption Peaking at 381 nm. J Phys Chem Lett 2022; 13:4941-4948. [PMID: 35635487 DOI: 10.1021/acs.jpclett.2c00884] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Yi Zhang
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610065, Sichuan, P. R. China
| | - Zhaopeng Cao
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, P. R. China
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, P. R. China
| | - Hai Zhang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, Guangdong, P. R. China
| | - Chaoran Luan
- Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, P. R. China
| | - Xiaoqin Chen
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610065, Sichuan, P. R. China
| | - Yang Li
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610065, Sichuan, P. R. China
| | - Yusha Yang
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610065, Sichuan, P. R. China
| | - Yan Li
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, P. R. China
| | - Jianrong Zeng
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, P. R. China
| | - Kui Yu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610065, Sichuan, P. R. China
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Liang X, Hu C, Han M, Liu C, Sun X, Yu K, Gu H, Zhang J. Solasonine Inhibits Pancreatic Cancer Progression With Involvement of Ferroptosis Induction. Front Oncol 2022; 12:834729. [PMID: 35494004 PMCID: PMC9039314 DOI: 10.3389/fonc.2022.834729] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 03/04/2022] [Indexed: 12/20/2022] Open
Abstract
Pancreatic cancer is a highly fatal malignant tumor of the digestive system. It is characterized by early metastasis and high mortality rates. Solasonine, a steroidal alkaloid, is derived from Solanum nigrum L., a natural herb. Solasonine is associated with excellent anti-tumor effects, however, its effects on pancreatic cancer have not been fully established. Pancreatic cancer cells (PANC-1 and CFPAC-1) were used to verify the in vitro and in vivo effects of solasonine. Metabolomics were used to evaluate its underlying mechanisms. Solasonine promoted PANC-1 and CFPAC-1 cell apoptosis while inhibiting their proliferation, migration and invasion. Mouse xenograft models and metastasis models of ANC-1 and CFPAC-1 confirmed that solasonine blocked tumor formation and metastasis. Metabolomics confirmed the effects of solasonine on glutathione metabolism and SLC7A11-mediated ferroptosis. Furthermore, Co-Immunoprecipitation and Duolink®in situ PLA confirmed that OTUB1, a deubiquitylating enzyme, interacted with SLC7A11 and solasonine to enhance ubiquitinated degradation of SLC7A11 in PANC-1 and CFPAC-1 cells. Besides, molecular docking confirmed that solasonine directly bound TFAP2A and suppressed its protein levels. Bioinformatics and luciferase assays revealed that TFAP2A binds the OTUB1 promoter region, thereby promoting its transcription. In summary, solasonine inhibits the TFAP2A/OTUB1 SLC7A11 axis to activate ferroptosis and suppress pancreatic cancer cell progression.
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Affiliation(s)
- Xiaoqiang Liang
- Institute of Chinese Traditional Surgery, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Cheng Hu
- Experiment Center for Science and Technology, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Mian Han
- Institute of Chinese Traditional Surgery, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Congying Liu
- Experiment Center for Science and Technology, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xun Sun
- Gastrointestinal surgery, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Kui Yu
- General surgery, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Honggang Gu
- Hepatobiliary surgery, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jingzhe Zhang
- Hepatobiliary surgery, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
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42
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Tekkis NP, Rafi D, Brown S, Courtney A, Kawka M, Howell AM, McLean K, Gardiner M, Mavroveli S, Hutchinson P, Tekkis P, Wilkinson P, Sam AH, Savva N, Kontovounisios C, Tekkis N, Rafi D, Brown S, Courtney A, Kawka M, Howell A, McLean K, Gardiner M, Mavroveli S, Hutchinson P, Tekkis P, Wilkinson P, Sam AH, Savva N, Kontovounisios C, Tekkis N, Rafi D, Brown S, Courtney A, Kawka M, Howell A, McLean K, Gardiner M, Mavroveli S, Hutchinson P, Tekkis P, Wilkinson P, Sam AH, Savva N, Kontovounisios C, Tekkis N, Brown S, Kawka M, Mclean K, Savva N, Wilkinson P, Sam AH, Singal A, Chia C, Chia W, Ganesananthan S, Ooi SZY, Pengelly S, Wellington J, Mak S, Subbiah Ponniah H, Heyes A, Aberman I, Ahmed T, Al-Shamaa S, Appleton L, Arshad A, Awan H, Baig Q, Benedict K, Berkes S, Citeroni NL, Damani A, de Sancha A, Fisayo T, Gupta S, Haq M, Heer B, Jones A, Khan H, Kim H, Meiyalagan N, Miller G, Minta N, Mirza L, Mohamed F, Ramjan F, Read P, Soni L, Tailor V, Tas RN, Vorona M, Walker M, Winkler T, Bardon A, Acquaah J, Ball T, Bani W, Elmasry A, Hussein F, Kolluri M, Lusta H, Newman J, Nott M, Perwaiz MI, Rayner R, Shah A, Shaw I, Yu K, Cairns M, Clough R, Gaier S, Hirani D, Jeyapalan T, Li Y, Patel CR, Shabir H, Wang YA, Weatherhead A, Dhiran A, Renney O, Wells P, Ferguson S, Joyce A, Mergo A, Adebayo O, Ahmad J, Akande O, Ang G, Aniereobi E, Awasthi S, Banjoko A, Bates J, Chibada C, Clarke N, Craner I, Desai DD, Dixon K, Duffaydar HI, Kuti M, Mughal AZ, Nair D, Pham MC, Preest GG, Reid R, Sachdeva GS, Selvaratnam K, Sheikh J, Soran V, Stoney N, Wheatle M, Howarth K, Knapp-Wilson A, Lee KS, Mampitiya N, Masson C, McAlinden JJ, McGowan N, Parmar SC, Robinson B, Wahid S, Willis L, Risquet R, Adebayo A, Dhingra L, Kathiravelupillai S, Narayanan R, Soni J, Ghafourian P, Hounat A, Lennon KA, Abdi Mohamud M, Chou W, Chong L, Graham CJ, Piya S, Riad AM, Vennard S, Wang J, Kawar L, Maseland C, Myatt R, Tengku Saifudin TNS, Yong SQ, Douglas F, Ogbechie C, Sharma K, Zafar L, Bajomo MO, Byrne MHV, Obi C, Oluyomi DI, Patsalides MA, Rajananthanan A, Richardson G, Clarke A, Roxas A, Adeboye W, Argus L, McSweeney J, Rahman-Chowdhury M, Hettiarachchi DS, Masood MT, Antypas A, Thomas M, de Andres Crespo M, Zimmerman M, Dhillon A, Abraha S, Burton O, Jalal AHB, Bailey B, Casey A, Kathiravelupillai A, Missir E, Boult H, Campen D, Collins JM, Dulai S, Elhassan M, Foster Z, Horton E, Jones E, Mahapatra S, Nancarrow T, Nyamapfene T, Rimmer A, Robberstad M, Robson-Brown S, Saeed A, Sarwar Y, Taylor C, Vetere G, Whelan MK, Williams J, Zahid D, Chand C, Matthews M. The impact of the COVID-19 pandemic on UK medical education. A nationwide student survey. Med Teach 2022; 44:574-575. [PMID: 34428109 DOI: 10.1080/0142159x.2021.1962835] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
| | - Damir Rafi
- School of Medicine, Imperial College London, London, UK
| | - Sam Brown
- Leicester Medical School, University of Leicester, Leicester, UK
| | - Alona Courtney
- Department of Surgery and Cancer, Imperial College London, London, UK
| | - Michal Kawka
- School of Medicine, Imperial College London, London, UK
| | - Ann-Marie Howell
- Department of Surgery and Cancer, Imperial College London, London, UK
| | - Kenneth McLean
- Division of Clinical and Surgical Sciences, University of Edinburgh, Edinburgh, UK
| | - Matthew Gardiner
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | | | - Peter Hutchinson
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Paris Tekkis
- Department of Surgery and Cancer, Imperial College London, London, UK
| | - Paul Wilkinson
- School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Amir H Sam
- School of Medicine, Imperial College London, London, UK
| | - Nicos Savva
- Division of Management Science and Operations, London Business School, London, UK
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- Plymouth University Peninsula Schools of Medicine and Dentistry
| | - T Ball
- Plymouth University Peninsula Schools of Medicine and Dentistry
| | - W Bani
- Plymouth University Peninsula Schools of Medicine and Dentistry
| | - A Elmasry
- Plymouth University Peninsula Schools of Medicine and Dentistry
| | - F Hussein
- Plymouth University Peninsula Schools of Medicine and Dentistry
| | - M Kolluri
- Plymouth University Peninsula Schools of Medicine and Dentistry
| | - H Lusta
- Plymouth University Peninsula Schools of Medicine and Dentistry
| | - J Newman
- Plymouth University Peninsula Schools of Medicine and Dentistry
| | - M Nott
- Plymouth University Peninsula Schools of Medicine and Dentistry
| | - M I Perwaiz
- Plymouth University Peninsula Schools of Medicine and Dentistry
| | - R Rayner
- Plymouth University Peninsula Schools of Medicine and Dentistry
| | - A Shah
- Plymouth University Peninsula Schools of Medicine and Dentistry
| | - I Shaw
- Plymouth University Peninsula Schools of Medicine and Dentistry
| | - K Yu
- Plymouth University Peninsula Schools of Medicine and Dentistry
| | | | | | - S Gaier
- Queen Mary University of London
| | | | | | - Y Li
- Queen Mary University of London
| | | | | | | | | | - A Dhiran
- St George's Hospital Medical School
| | - O Renney
- St George's Hospital Medical School
| | - P Wells
- St George's Hospital Medical School
| | | | - A Joyce
- The Queen's University of Belfast
| | | | | | - J Ahmad
- The University of Birmingham
| | | | - G Ang
- The University of Birmingham
| | | | | | | | - J Bates
- The University of Birmingham
| | | | | | | | | | - K Dixon
- The University of Birmingham
| | | | - M Kuti
- The University of Birmingham
| | | | - D Nair
- The University of Birmingham
| | | | | | - R Reid
- The University of Birmingham
| | | | | | | | - V Soran
- The University of Birmingham
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - J Soni
- The University of Cambridge
| | | | | | | | | | - W Chou
- The University of East Anglia
| | | | | | - S Piya
- The University of Edinburgh
| | | | | | - J Wang
- The University of Edinburgh
| | | | | | | | | | | | | | | | | | | | | | | | - C Obi
- The University of Leicester
| | | | | | | | | | | | | | | | - L Argus
- The University of Manchester
| | | | | | | | | | | | | | | | | | | | | | | | | | - B Bailey
- University of Brighton and Sussex
| | - A Casey
- University of Brighton and Sussex
| | | | - E Missir
- University of Brighton and Sussex
| | - H Boult
- University of Exeter Medical School
| | - D Campen
- University of Exeter Medical School
| | | | - S Dulai
- University of Exeter Medical School
| | | | - Z Foster
- University of Exeter Medical School
| | - E Horton
- University of Exeter Medical School
| | - E Jones
- University of Exeter Medical School
| | | | | | | | - A Rimmer
- University of Exeter Medical School
| | | | | | - A Saeed
- University of Exeter Medical School
| | - Y Sarwar
- University of Exeter Medical School
| | - C Taylor
- University of Exeter Medical School
| | - G Vetere
- University of Exeter Medical School
| | | | | | - D Zahid
- University of Exeter Medical School
| | - C Chand
- University of Hull and the University of York
| | - M Matthews
- University of Hull and the University of York
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Cao Z, Zhu J, Peng J, Meng N, Bian F, Luan C, Zhang M, Li Y, Yu K, Zeng J. Transformation Pathway from CdSe Nanoplatelets with Absorption Doublets at 373/393 nm to Nanoplatelets at 434/460 nm. J Phys Chem Lett 2022; 13:3983-3989. [PMID: 35481745 DOI: 10.1021/acs.jpclett.2c00844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
For those colloidal semiconductor CdSe nanospecies that exhibit sharp optical absorption doublets, different explanations have appeared in the literature regarding their morphological nature and formation, with no consensus reached. Here, we discuss the transformation pathway in two types of CdSe nanoplatelets (NPLs), from NPL-393 to NPL-460, exhibiting absorption doublets at 373/393 and 433/460 nm, respectively. Synchrotron-based small/wide-angle X-ray scattering (SAXS/WAXS) was performed to monitor the in situ transformation associated with the temperature. Combining the results of SAXS/WAXS, optical spectroscopy, and transmission electron microscopy, we propose that the transformation pathway experiences corresponding magic-sized clusters (MSCs), which display similar optical properties but with zero-dimensional structure. From stacked NPL-393 to stacked NPL-460, the transformation goes through sequentially individual NPL-393, MSC-393, MSC-460, and individual NPL-460 at their corresponding characteristic temperature. The present findings provide compelling evidence that both MSCs and their assembled NPLs exhibit similar optical absorption.
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Affiliation(s)
- Zhaopeng Cao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China.,Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, People's Republic of China.,School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jinming Zhu
- School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou 550025, People's Republic of China.,Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China
| | - Jun Peng
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Nan Meng
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China.,Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Fenggang Bian
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China.,Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Chaoran Luan
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China.,Laboratory of Ethnopharmacology, Tissue-Orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, People's Republic of China
| | - Meng Zhang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China
| | - Yan Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China.,Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, People's Republic of China.,School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Kui Yu
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China.,Engineering Research Center in Biomaterials, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China
| | - Jianrong Zeng
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China.,Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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Cheng D, Li J, Liu L, Le TD, Liu J, Yu K. Sufficient dimension reduction for average causal effect estimation. Data Min Knowl Discov 2022. [DOI: 10.1007/s10618-022-00832-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
AbstractA large number of covariates can have a negative impact on the quality of causal effect estimation since confounding adjustment becomes unreliable when the number of covariates is large relative to the number of samples. Propensity score is a common way to deal with a large covariate set, but the accuracy of propensity score estimation (normally done by logistic regression) is also challenged by the large number of covariates. In this paper, we prove that a large covariate set can be reduced to a lower dimensional representation which captures the complete information for adjustment in causal effect estimation. The theoretical result enables effective data-driven algorithms for causal effect estimation. Supported by the result, we develop an algorithm that employs a supervised kernel dimension reduction method to learn a lower dimensional representation from the original covariate space, and then utilises nearest neighbour matching in the reduced covariate space to impute the counterfactual outcomes to avoid the large sized covariate set problem. The proposed algorithm is evaluated on two semisynthetic and three real-world datasets and the results show the effectiveness of the proposed algorithm.
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Meda R, Fu S, Yu K, Charya A, Kong H, Jang M, Andargie T, Park W, Lee J, Tunc I, Berry G, Marboe C, Shah P, Nathan S, Keller M, Agbor-Enoh S. Comparative Performance Analysis of Donor-Derived Cell-Free DNA to Detect Acute Rejection in Single and Double Lung Transplant Recipients. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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47
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Yang Y, Li Y, Luan C, Rowell N, Wang S, Zhang C, Huang W, Chen X, Yu K. Transformation Pathways in Colloidal CdTeSe Magic‐Size Clusters. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Yusha Yang
- Engineering Research Center in Biomaterials Sichuan University Chengdu Sichuan 610065 P. R. China
| | - Yang Li
- Engineering Research Center in Biomaterials Sichuan University Chengdu Sichuan 610065 P. R. China
| | - Chaoran Luan
- Laboratory of Ethnopharmacology West China School of Medicine West China Hospital Sichuan University Chengdu Sichuan 610065 P. R. China
| | - Nelson Rowell
- Metrology Research Centre National Research Council Canada Ontario K1A 0R6 Canada
| | - Shanling Wang
- Analytical & Testing Center Sichuan University Chengdu Sichuan 610065 P. R. China
| | - Chunchun Zhang
- Analytical & Testing Center Sichuan University Chengdu Sichuan 610065 P. R. China
| | - Wen Huang
- Laboratory of Ethnopharmacology West China School of Medicine West China Hospital Sichuan University Chengdu Sichuan 610065 P. R. China
| | - Xiaoqin Chen
- Engineering Research Center in Biomaterials Sichuan University Chengdu Sichuan 610065 P. R. China
| | - Kui Yu
- Engineering Research Center in Biomaterials Sichuan University Chengdu Sichuan 610065 P. R. China
- Institute of Atomic and Molecular Physics Sichuan University Chengdu Sichuan 610065 P. R. China
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48
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Li Y, Rowell N, Luan C, Zhang M, Chen X, Yu K. A Two-Pathway Model for the Evolution of Colloidal Compound Semiconductor Quantum Dots and Magic-Size Clusters. Adv Mater 2022; 34:e2107940. [PMID: 35119147 DOI: 10.1002/adma.202107940] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/29/2021] [Indexed: 02/05/2023]
Abstract
A fundamental understanding of formation pathways is critical to the controlled synthesis of colloidal semiconductor nanocrystals. As ultrasmall-size quantum dots (QDs) sometimes emerge in reactions along with magic-size clusters (MSCs), distinguishing their individual pathway of evolution is important, but has proven difficult. To decouple the evolution of QDs and MSCs, an unconventional, selective approach has been developed, along with a two-pathway model that provides a fundamental understanding of production selectivity. For on-demand production of either ultrasmall QDs or MSCs, the key enabler is in how to allow a reaction to proceed in the time prior to nucleation and growth of QDs. In this prenucleation stage, an intermediate compound forms, which is the precursor compound (PC) to the MSC. Here, the two-pathway model and the manipulation of such PCs to synthesize either ultrasmall QDs or binary and ternary MSCs are highlighted. The two-pathway model will assist the development of nucleation theory as well as provide a basis for a mechanism-enabled design and predictive synthesis of functional nanomaterials.
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Affiliation(s)
- Yang Li
- Engineering Research Center in Biomaterials Sichuan University Chengdu Sichuan 610065 P. R. China
| | - Nelson Rowell
- Metrology Research Centre National Research Council Canada Ottawa Ontario K1A 0R6 Canada
| | - Chaoran Luan
- Department of Ophthalmology West China School of Medicine West China Hospital, Sichuan University Chengdu Sichuan 610065 P. R. China
| | - Meng Zhang
- Institute of Atomic and Molecular Physics Sichuan University Chengdu Sichuan 610065 P. R. China
| | - Xiaoqin Chen
- Engineering Research Center in Biomaterials Sichuan University Chengdu Sichuan 610065 P. R. China
| | - Kui Yu
- Engineering Research Center in Biomaterials Sichuan University Chengdu Sichuan 610065 P. R. China
- Institute of Atomic and Molecular Physics Sichuan University Chengdu Sichuan 610065 P. R. China
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Liang X, Zheng C, Ding K, Huang X, Zhang S, Lei Y, Yu K, Wang Y. Arginine-grafted porcine pericardium by copolymerization to improve cytocompatibility, hemocompatibility and anti-calcification properties of bioprosthetic heart valve materials. J Mater Chem B 2022; 10:5571-5581. [DOI: 10.1039/d2tb00798c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bioprosthetic heart valves (BHVs) have been used widely due to the development of transcatheter heart valve replacement technology. However, glutaraldehyde crosslinked pericardium (GA), which is widely used as a leaflet...
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50
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Shen J, Luan C, Rowell N, Li Y, Zhang M, Chen X, Yu K. Size matters: Steric hindrance of precursor molecules controlling the evolution of CdSe magic-size clusters and quantum dots. Nano Res 2022; 15:8564-8572. [PMID: 35669506 PMCID: PMC9154029 DOI: 10.1007/s12274-022-4421-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/27/2022] [Accepted: 04/12/2022] [Indexed: 02/05/2023]
Abstract
Little is known about how to precisely promote the selective production of either colloidal semiconductor metal chalcogenide (ME), magic-size clusters (MSCs), or quantum dots (QDs). Recently, a two-pathway model has been proposed to comprehend their evolution; here, we reveal for the first time that the size of precursors plays a decisive role in the selected evolution pathway of MSCs and QDs. With the reaction of cadmium myristate (Cd(MA)2) and tri-n-octylphosphine selenide (SeTOP) in 1-octadecene (ODE) as a model system, the size of Cd precursors was manipulated by the steric hindrance of carboxylic acid (RCOOH) additive. Without RCOOH, the reaction produced both CdSe MSCs and QDs (from 100 to 240 °C). With RCOOH, the reaction produced MSCs or QDs when R was small (such as CH3-) or large (such as C6H5-), respectively. According to the two-pathway model, the selective evolution is attributed to the promotion and suppression of the self-assembly of Cd and Se precursors, respectively. We propose that the addition of carboxylic acid may occur ligand exchange with Cd(MA)2, causing the different sizes of Cd precursor. The results suggest that the size of Cd precursors regulates the self-assemble behavior of the precursors, which dictates the directed evolution of either MSCs or QDs. The present findings bring insights into the two-pathway model, as the size of M and E precursors determine the evolution pathways of MSCs or QDs, the understanding of which is of great fundamental significance toward mechanism-enabled design and predictive synthesis of functional nanomaterials. Electronic Supplementary Material Supplementary material (additional optical absorption spectra, TEM, NMR, FT-IR, and XRD) is available in the online version of this article at 10.1007/s12274-022-4421-4.
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Affiliation(s)
- Juan Shen
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610065 China
| | - Chaoran Luan
- Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, 610065 China
| | - Nelson Rowell
- Metrology Research Centre, National Research Council Canada, Ottawa, Ontario K1A 0R6 Canada
| | - Yang Li
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610065 China
| | - Meng Zhang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610065 China
| | - Xiaoqin Chen
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610065 China
| | - Kui Yu
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610065 China
- Laboratory of Ethnopharmacology, Tissue-orientated Property of Chinese Medicine Key Laboratory of Sichuan Province, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, 610065 China
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610065 China
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