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Xiong N, Zhou C, Li S, Wang S, Ke C, Rong Z, Li Y, Zeng R. Iron-Catalyzed Csp 2-Csp 3 Cross-Coupling via Double Decarboxylation: One Step Synthesis of Remote Polar Alkenes. Org Lett 2024; 26:2029-2033. [PMID: 38437519 DOI: 10.1021/acs.orglett.4c00121] [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: 03/06/2024]
Abstract
Herein, we report an efficient photoinduced iron-catalyzed strategy for cross-couplings of alkyl carboxylic and acrylic acids, which provides a powerful tool for the synthesis of a variety of alkenes with polar functional groups. This novel synthetic methodology can also be applied to the preparation of ketones by using α-keto acids. Mechanistic experiments revealed preliminary mechanistic details. Diverse functionalization could be achieved, which may help streamline the synthesis of complex analogues for drug discovery.
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Affiliation(s)
- Ni Xiong
- Hwamei College of Life and Health Sciences, Zhejiang Wanli University, Ningbo 315100, China
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Chengxiang Zhou
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an, 710065, P. R. China
| | - Shiyi Li
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Sichang Wang
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an, 710065, P. R. China
| | - Congyu Ke
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an, 710065, P. R. China
| | - Zhouting Rong
- Hwamei College of Life and Health Sciences, Zhejiang Wanli University, Ningbo 315100, China
| | - Yang Li
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Rong Zeng
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, P. R. China
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2
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Xiong N, An JS, Yoon H, Ryoo HM, Lim WH. Runx2 heterozygosity alters homeostasis of the periodontal complex. J Periodontal Res 2024; 59:151-161. [PMID: 37882070 DOI: 10.1111/jre.13198] [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: 04/14/2023] [Revised: 10/02/2023] [Accepted: 10/12/2023] [Indexed: 10/27/2023]
Abstract
BACKGROUND AND OBJECTIVE Haploinsufficiency of Runx2 (Runx2+/- ) causes dental anomalies. However, little is known about the involvement of Runx2 in the maintenance of dentin, cementum, and the periodontal ligament (PDL) during adulthood. This study aimed to observe the effects of Runx2+/- on homeostasis of the periodontal complex. MATERIALS AND METHODS A total of 14 three-month-old Runx2+/- mice and their wild-type littermates were examined using micro-computed tomography, histology, and immunohistochemistry. Phenotypic alterations in the dentin, cementum, and PDL were characterized and quantified. RESULTS Haploinsufficiency of Runx2 caused cellular changes in the PDL space including reduction of cell proliferation and apoptosis, and irregular attachment of the collagen fibers in the PDL space into the cementum. Absence of continuous thickness of cementum was also observed in Runx2+/- mice. CONCLUSION Runx2 is critical for cementum integrity and attachment of periodontal fibers. Because of its importance to cementum homeostasis, Runx2 is essential for homeostasis of periodontal complex.
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Affiliation(s)
- Ni Xiong
- Department of Orthodontics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Korea
| | - Jung-Sub An
- Department of Orthodontics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Korea
| | - Heein Yoon
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Korea
| | - Hyun-Mo Ryoo
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Korea
| | - Won Hee Lim
- Department of Orthodontics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Korea
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3
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Xiong N, Yang HJ, Kim SM, Hwang SJ. Long-term Stability Over 2 Years After Isolated Maxillary Orthognathic Surgery Combined With Mandibular Autorotation in Risk Patients for Condylar Resorption. J Craniofac Surg 2023; 34:e743-e749. [PMID: 37463306 DOI: 10.1097/scs.0000000000009546] [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] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 05/21/2023] [Indexed: 07/20/2023] Open
Abstract
OBJECTIVE Counterclockwise rotation of mandible can cause condylar resorption and condylar displacement posteroinferiorly after maxillary orthognathic surgery with mandibular in patients with high-angle mandibular retrognathism. This study was aimed to evaluate long-term stability >2 years and postoperative changes of condylar displacement. MATERIALS AND METHODS In 15 patients who underwent Le Fort I osteotomy with mandibular autorotation, postoperative stability was cephalometrically investigated until 2 years. Condylar changes were analyzed with transcranial temporomandibular joint projection. Correlation between condylar displacement and surgical movement was analyzed. RESULTS Significant clockwise relapse of mandible ( P <0.01 for SNB reduction and backward movement of point B) was observed between 6 months and >2 years after surgery, even though the values were small (0.5±0.1 degrees and 1.14±0.13 mm, respectively). The condyle was displaced posteroinferiorly immediately after surgery; however, it achieved a stable position at postoperative 6 weeks. The amount of vertical condylar displacement was significantly correlated with surgical change in mandibular posterior border sagittal angle, palatal plane angle, facial height ratio, and point B in the horizontal dimension. Greater mandibular rotation prompted more vertical condylar displacement. CONCLUSIONS Small mandibular relapse in long term should be considered after maxillary orthognathic surgery with mandibular autorotation, although it is regarded as a surgical maneuver to minimize mandibular instability in patients susceptible to postoperative condylar resorption.
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Affiliation(s)
- Ni Xiong
- Department of Orthodontic, School of Dentistry, Seoul National University
| | - Hoon Joo Yang
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Seoul National University
- Dental Research Institute, Seoul National University
| | - Soung Min Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Seoul National University
- Dental Research Institute, Seoul National University
| | - Soon Jung Hwang
- Dental Research Institute, Seoul National University
- MACS Dental Clinic for Oral and Maxillofacial Surgery, Seoul, Republic of Korea
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4
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Xiong N, Li Y, Zeng R. Merging Photoinduced Iron-Catalyzed Decarboxylation with Copper Catalysis for C–N and C–C Couplings. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05293] [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: 01/15/2023]
Affiliation(s)
- Ni Xiong
- School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, P. R. China
| | - Yang Li
- School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, P. R. China
| | - Rong Zeng
- School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, P. R. China
- Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, Guangdong, P. R. China
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Abstract
Amide synthesis is one of the most important transformations in organic chemistry due to the broad application in pharmaceutical drugs and organic materials. In this report, we describe a mild protocol for amide formation using the readily available nitroarenes as nitrogen sources and an inexpensive iron complex as a catalyst. Because of the use of the pH-neutral conditions and the avoidance of the strong oxidant or reductant, a wide range of aromatic and aliphatic aldehydes as well as nitroarenes with various functional groups could be tolerated well. A plausible mechanism is proposed based on the detailed studies, in which iron catalyst initiates the radical process and the solvent plays a key role as O-atom acceptor.
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Affiliation(s)
- Ni Xiong
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Yuanqi Dong
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Bin Xu
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Yang Li
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Rong Zeng
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, P. R. China.,Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, Guangdong, P. R. China
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Sun L, Zhong Z, Qu Z, Xiong N. PerAE: An Effective Personalized AutoEncoder for ECG-based Biometric in Augmented Reality System. IEEE J Biomed Health Inform 2022; 26:2435-2446. [PMID: 35077376 DOI: 10.1109/jbhi.2022.3145999] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
With the development of the Augmented and Virtual Reality (AR/VR) technologies, massive biometric data are collected by different organizations. These data have great significance but also worsen the privacy risks. Electro-CardioGram (ECG)-based Identity Recognition (EIR) is a popular Biometric technology. An ECG record is an internal Biology feature of a person and has time continuity. Thus, compared with traditional Biometric methods like face recognition, EIR may be less vulnerable to attack. We propose an Autoencoder-based EIR system, called Personalized AutoEncoder (PerAE). PerAE maintains a small autoencoder model (called Attention-MemAE) for each registered user of a system. The Attention-MemAE enhances the autoencoder by using a memory module and two attention mechanisms. A users Attention-MemAE classifies the hearbeats of other users as anomalies. An Attention-MemAE can be updated when the distribution of the users ECG data is changed. By using personalized autoencoder, PerAE can improve the time efficiency and reduce the memory overhead. It improves the adaptability, scalability, and maintainability of EIR systems. Experiment results show that to train an Attention-MemAE with 90% identification accuracy for a user, we can just take five minutes to collect the users ECG data (around 500 heartbeat samples).
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Huang Q, Meng L, Li H, Xiong N, Zeng L, Wang G, Zhang P, Zhao H, Liu D. Huoxue Jiangtang Decoction Alleviates Type 2 Diabetes Mellitus by Regulating the Oral Microbiota and Food Preferences. Diabetes Metab Syndr Obes 2022; 15:3739-3751. [PMID: 36474726 PMCID: PMC9719691 DOI: 10.2147/dmso.s391226] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 11/24/2022] [Indexed: 11/30/2022] Open
Abstract
PURPOSE As a formula of traditional Chinese medicine (TCM), Huoxue Jiangtang Decoction (HJD) has positive effects on diabetes mellitus (DM) through improving of the metabolism of glycolipid and the function of β-cell. Hence, this research aims to explore the potential therapeutic effects of HJD on diabetes and reveal its underlying mechanisms. METHODS Diabetic rat models induced by high-fat diet (HFD) and streptozotocin (STZ) were included in this study. Following successful modeling, diabetic rats were treated with HJD, and then its therapeutic effects in eight weeks were evaluated. In addition to biochemical indicators, two-bottle preference tests were carried out to examine the rats' preferences for fat and sugar, and 16S rRNA gene sequencing was performed to disclose the differences of oral microbiota among groups. Finally, Pearson correlation coefficient was used to explore the correlation between oral microbiota and the preferences for fat and sugar. RESULTS It was found that HJD significantly improved the levels of fasting blood glucose (FBG), glucose tolerance, and dyslipidemia. Additionally, HJD contributed to decreasing preferences for fat and sugar in diabetic rats, which plays an important role in food intake. Furthermore, HJD regulated the abundance, distribution, and structure of oral microbiota in diabetic rats, serving as one of the underlying mechanisms of its antidiabetic effects. CONCLUSION Taken with other formulas, HJD functions to improve the metabolism of glycolipid and the function of β-cell by inhibiting preferences for fat and sugar, as well as regulating the oral microbiota of diabetic rats. Furthermore, a potential correlation between the oral micro-environment and preferences for fat and sugar in STZ-induced diabetic rats is likely to exist.
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Affiliation(s)
- Qian Huang
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, People’s Republic of China
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, People’s Republic of China
| | - Lu Meng
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, People’s Republic of China
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, People’s Republic of China
| | - Huilin Li
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, People’s Republic of China
| | - Ni Xiong
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, People’s Republic of China
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, People’s Republic of China
| | - Lin Zeng
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, People’s Republic of China
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, People’s Republic of China
| | - Gaoxiang Wang
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, People’s Republic of China
- Shenzhen Traditional Chinese Medicine Hospital Affiliated to Nanjing University of Chinese Medicine, Shenzhen, People’s Republic of China
| | - Pengxiang Zhang
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, People’s Republic of China
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, People’s Republic of China
| | - Hengxia Zhao
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, People’s Republic of China
| | - Deliang Liu
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, People’s Republic of China
- Correspondence: Deliang Liu, Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, 1# Fuhua Road, Futian District, Shenzhen, 518033, People’s Republic of China, Tel +86 13924610289, Fax +86 755-88358328-3319, Email
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8
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Abstract
We report a general photocatalytic protocol for the remote C(sp3)-H bond amination of free aliphatic alcohols. The electron transfer between the abundant and inexpensive catalyst FeCl3 and simple alkanols under blue LED irradiation enables the alkoxy radical formation under mild redox-neutral conditions, with no need for additional oxidant and prefunctionalization. The subsequent selective 1,5-hydrogen atom transfer (HAT) and amination provide a simple and efficient way to access molecular complexity from readily available and bulk alcohols.
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Affiliation(s)
- Ni Xiong
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Yang Li
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Rong Zeng
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University, Xi'an 710049, P. R. China.,Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, Guangdong, P. R. China
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9
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Xie Z, Cao X, Zhang J, Darihaki F, Karimi S, Xiong N, Li Q. Effect of cell size on erosion representation and recommended practices in CFD. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2021.05.066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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López D, Ramírez-Gallego S, García S, Xiong N, Herrera F. BELIEF: A distance-based redundancy-proof feature selection method for Big Data. Inf Sci (N Y) 2021. [DOI: 10.1016/j.ins.2020.12.082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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11
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Zhang Z, Zhang G, Xiong N, Xue T, Zhang J, Bai L, Guo Q, Zeng R. Oxidative α-C-C Bond Cleavage of 2° and 3° Alcohols to Aromatic Acids with O 2 at Room Temperature via Iron Photocatalysis. Org Lett 2021; 23:2915-2920. [PMID: 33769053 DOI: 10.1021/acs.orglett.1c00556] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The selective α-C-C bond cleavage of unfunctionalized secondary (2°) and tertiary alcohols (3°) is essential for valorization of macromolecules and biopolymers. We developed a blue-light-driven iron catalysis for aerobic oxidation of 2° and 3° alcohols to acids via α-C-C bond cleavages at room temperature. The first example of oxygenation of the simple tertiary alcohols was reported. The iron catalyst and blue light play critical roles to enable the formation of highly reactive O radicals from alcohols and the consequent two α-C-C bond cleavages.
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Abstract
BACKGROUND COVID-19 is a new pneumonia. It has been hypothesized that tobacco smoking history may increase severity of this disease in the patients once infected by the underlying coronavirus SARS-CoV-2 because smoking and COVID-19 both cause lung damage. However, this hypothesis has not been tested. OBJECTIVE Current study was designed to focus on smoking history in patients with COVID-19 and test this hypothesis that tobacco smoking history increases risk for severe COVID-19 by damaging the lungs. METHODS AND RESULTS This was a single-site, retrospective case series study of clinical associations, between epidemiological findings and clinical manifestations, radiographical or laboratory results. In our well-characterized cohort of 954 patients including 56 with tobacco smoking history, smoking history increased the risk for severe COVID-19 with an odds ratio (OR) of 5.5 (95% CI: 3.1-9.9; P = 7.3 × 10-8 ). Meta-analysis of ten cohorts for 2891 patients together obtained an OR of 2.5 (95% CI: 1.9-3.3; P < 0.00001). Semi-quantitative analysis of lung images for each of five lobes revealed a significant difference in neither lung damage at first examination nor dynamics of the lung damage at different time-points of examinations between the smoking and nonsmoking groups. No significant differences were found either in laboratory results including D-dimer and C-reactive protein levels except different covariances for density of the immune cells lymphocyte (P = 3.8 × 10-64 ) and neutrophil (P = 3.9 × 10-46 ). CONCLUSION Tobacco smoking history increases the risk for great severity of COVID-19 but this risk is achieved unlikely by affecting the lungs.
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Affiliation(s)
- J Li
- From the, Medical Treatment Expert Group for COVID-19, Wuhan Red Cross Hospital, Wuhan, Hubei, China.,Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - X Long
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Q Zhang
- From the, Medical Treatment Expert Group for COVID-19, Wuhan Red Cross Hospital, Wuhan, Hubei, China
| | - X Fang
- From the, Medical Treatment Expert Group for COVID-19, Wuhan Red Cross Hospital, Wuhan, Hubei, China
| | - N Li
- From the, Medical Treatment Expert Group for COVID-19, Wuhan Red Cross Hospital, Wuhan, Hubei, China
| | - B Fedorova
- Department of Emergency Medicine, Sana-Klinikum Offenbach, Hessen, Germany
| | - S Hu
- Department of Radiology, Wuhan Red Cross Hospital, Wuhan, Hubei, China
| | - Jh Li
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - N Xiong
- From the, Medical Treatment Expert Group for COVID-19, Wuhan Red Cross Hospital, Wuhan, Hubei, China.,Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Z Lin
- McLean Hospital, Harvard Medical School, Belmont, MA, USA
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Xiong N, Zhou X, Yang X, Xiang Y, Ma J. Mobile Robot Path Planning Based on Time Taboo Ant Colony Optimization in Dynamic Environment. Front Neurorobot 2021; 15:642733. [PMID: 33732132 PMCID: PMC7956960 DOI: 10.3389/fnbot.2021.642733] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 12/16/2020] [Accepted: 01/25/2021] [Indexed: 11/16/2022] Open
Abstract
This article aims to improve the problem of slow convergence speed, poor global search ability, and unknown time-varying dynamic obstacles in the path planning of ant colony optimization in dynamic environment. An improved ant colony optimization algorithm using time taboo strategy is proposed, namely, time taboo ant colony optimization (TTACO), which uses adaptive initial pheromone distribution, rollback strategy, and pheromone preferential limited update to improve the algorithm's convergence speed and global search ability. For the poor global search ability of the algorithm and the unknown time-varying problem of dynamic obstacles in a dynamic environment, a time taboo strategy is first proposed, based on which a three-step arbitration method is put forward to improve its weakness in global search. For the unknown time-varying dynamic obstacles, an occupancy grid prediction model is proposed based on the time taboo strategy to solve the problem of dynamic obstacle avoidance. In order to improve the algorithm's calculation speed when avoiding obstacles, an ant colony information inheritance mechanism is established. Finally, the algorithm is used to conduct dynamic simulation experiments in a simulated factory environment and is compared with other similar algorithms. The experimental results show that the TTACO can obtain a better path and accelerate the convergence speed of the algorithm in a static environment and can successfully avoid dynamic obstacles in a dynamic environment.
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Affiliation(s)
- Ni Xiong
- College of Electronics and Information Engineering, Sichuan University, Chengdu, China
| | - Xinzhi Zhou
- College of Electronics and Information Engineering, Sichuan University, Chengdu, China
| | - Xiuqing Yang
- The Second Research Institute of Civil Aviation Administration of China, Chengdu, China.,Civil Aviation Logistics Technology Company Limited, Chengdu, China
| | - Yong Xiang
- The Second Research Institute of Civil Aviation Administration of China, Chengdu, China.,Civil Aviation Logistics Technology Company Limited, Chengdu, China
| | - Junyong Ma
- The Second Research Institute of Civil Aviation Administration of China, Chengdu, China.,Civil Aviation Logistics Technology Company Limited, Chengdu, China
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14
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Zhang X, Yang J, Xiong N, Han Z, Duan X, Zeng R. Indium-mediated annulation of 2-azidoaryl aldehydes with propargyl bromides to [1,2,3]triazolo[1,5- a]quinolines. Org Biomol Chem 2021; 19:6346-6352. [PMID: 34231622 DOI: 10.1039/d1ob01183a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient indium-mediated cascade annulation reaction of 2-azidoaryl aldehydes with propargyl bromides is reported. The aromatic 5/6/6-fused heterocycles, [1,2,3]triazolo[1,5-a]quinoline derivatives, could be constructed in one pot in moderate yields with a broad substrate scope. Mechanistic studies indicated that the reaction proceeded through allenol formation, azide-allene [3 + 2] cycloaddition, and dehydration. The synthetic potential of the products including the denitrogenative functionalization and the Pd-catalyzed coupling reactions has also been explored.
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Affiliation(s)
- Xiaomin Zhang
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an 710049, P. R. China.
| | - Jiali Yang
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an 710049, P. R. China.
| | - Ni Xiong
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an 710049, P. R. China.
| | - Zhe Han
- School of Nuclear Science and Technology, Xi'an Jiaotong University (XJTU), Xi'an 710049, P. R. China
| | - Xinhua Duan
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an 710049, P. R. China.
| | - Rong Zeng
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an 710049, P. R. China. and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
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15
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Liu J, Tayob N, Campos S, Wright A, Krasner C, Schumer S, Horowitz N, Veneris J, Xiong N, West G, Quinn R, Matulonis U, Konstantinopoulos P. A phase II trial of the Wee1 inhibitor adavosertib (AZD1775) in recurrent uterine serous carcinoma. Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.06.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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Konstantinopoulos P, Gockley A, Xiong N, Tayob N, Krasner C, Buss M, Campos S, Schumer S, Wright A, Liu J, Shea M, Oladapo Y, Castro C, Polak M, Whalen C, Bouberhan S, Cannistra S, Penson R, Fleming G, Matulonis U. LBA35 Phase II study of PARP inhibitor talazoparib and PD-L1 inhibitor avelumab in patients (pts) with microsatellite stable (MSS) recurrent/persistent endometrial cancer. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.2265] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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17
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Li J, Long X, Fang X, Zhang Q, Hu S, Lin Z, Xiong N. SARS-CoV-2 positivity in a discharged COVID-19 patient: a case report. Clin Microbiol Infect 2020; 26:1115-1117. [PMID: 32360448 PMCID: PMC7194898 DOI: 10.1016/j.cmi.2020.04.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/21/2020] [Accepted: 04/23/2020] [Indexed: 12/28/2022]
Affiliation(s)
- J Li
- Medical Treatment Expert Group for COVID-19, Wuhan Red Cross Hospital, Wuhan, Hubei, China; Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - X Long
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - X Fang
- Medical Treatment Expert Group for COVID-19, Wuhan Red Cross Hospital, Wuhan, Hubei, China
| | - Q Zhang
- Medical Treatment Expert Group for COVID-19, Wuhan Red Cross Hospital, Wuhan, Hubei, China
| | - S Hu
- Department of Radiology, Wuhan Red Cross Hospital, China.
| | - Z Lin
- McLean Hospital, Harvard Medical School, Belmont, MA, USA
| | - N Xiong
- Medical Treatment Expert Group for COVID-19, Wuhan Red Cross Hospital, Wuhan, Hubei, China; Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
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Xiong N, Zhang G, Sun X, Zeng R. Metal‐Metal Cooperation in Dinucleating Complexes Involving Late Transition Metals Directed towards Organic Catalysis. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.201900371] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Ni Xiong
- Department of ChemistrySchool of Science, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University Xi'an Shaanxi 710049 China
| | - Guoxiang Zhang
- Department of ChemistrySchool of Science, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University Xi'an Shaanxi 710049 China
| | - Xiaolong Sun
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and TechnologyXi'an Jiaotong University Xi'an Shaanxi 710049 China
| | - Rong Zeng
- Department of ChemistrySchool of Science, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University Xi'an Shaanxi 710049 China
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Zhao L, Chen J, Xiong N, Bai Y, Yilihamu A, Ma Q, Yang S, Wu D, Yang ST. Carboxylation as an effective approach to improve the adsorption performance of graphene materials for Cu 2+ removal. Sci Total Environ 2019; 682:591-600. [PMID: 31128372 DOI: 10.1016/j.scitotenv.2019.05.190] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 05/10/2019] [Accepted: 05/14/2019] [Indexed: 06/09/2023]
Abstract
Graphene materials are high-performance adsorbents for water and soil remediation, whose oxygen containing groups bind to metal ions intensely. In this study, we prepared carboxylated graphene oxide (GO-OCH2COOH) sponge and investigated the adsorption behaviors of Cu2+ on it by both experimental and computational approaches. Carboxylation largely improved the adsorption capacity from 23.8mg/g for graphene oxide (GO) sponge to 93.8mg/g for GO-OCH2COOH. The efficient adsorption was due to the strong interaction between Cu2+ and carboxyl groups (especially in -OCH2COOH form) according to the density functional theory calculation, while epoxy and hydroxyl groups contributed lowly. The fast adsorption process was achieved within 30min, corresponding to a large k2 value of pseudo-second order model (0.061mg/g/min). The adsorption was spontaneous and exothermic according to thermodynamics analyses. The binding strength of Cu2+ on GO-OCH2COOH was so strong that pH and ionic strength had mild impact. The strong binding sites were not recyclable, but the weaker ones (more than 40%) could be regenerated by simple washing. Our results highlighted the importance of chemical design in graphene adsorbents and the potential of GO-OCH2COOH in heavy metal fixation from water and soil.
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Affiliation(s)
- Lianqin Zhao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Rd., Shanghai 200240, China
| | - Junxian Chen
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China
| | - Ni Xiong
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China
| | - Yitong Bai
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China
| | - Ailimire Yilihamu
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China
| | - Qiang Ma
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China
| | - Shengnan Yang
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China
| | - Deyi Wu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Rd., Shanghai 200240, China.
| | - Sheng-Tao Yang
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China.
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20
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Huang L, Fan Y, Xiong N, Tang Z, Wu M. Evaluation of photoselective vaporization of the prostate with 980-nm diode laser in the treatment of benign prostatic hyperplasia: 36-month follow up. Int J Urol 2019; 26:940-941. [PMID: 31288297 DOI: 10.1111/iju.14051] [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: 11/28/2022]
Affiliation(s)
- Lin Huang
- Department of Urology, The Fourth Affiliated Hospital of Guangxi Medical University, Liuzhou, Guangxi Zhuang Autonomous Region, China
| | - Yongyi Fan
- Department of Urology, The Fourth Affiliated Hospital of Guangxi Medical University, Liuzhou, Guangxi Zhuang Autonomous Region, China
| | - Ni Xiong
- Department of Urology, The Fourth Affiliated Hospital of Guangxi Medical University, Liuzhou, Guangxi Zhuang Autonomous Region, China
| | - Zhen Tang
- Department of Urology, The Fourth Affiliated Hospital of Guangxi Medical University, Liuzhou, Guangxi Zhuang Autonomous Region, China
| | - Minggui Wu
- Department of Urology, The Fourth Affiliated Hospital of Guangxi Medical University, Liuzhou, Guangxi Zhuang Autonomous Region, China
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21
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Cai W, Cai Q, Xiong N, Qin Y, Lai L, Sun X, Hu Y. Limited Sampling Strategy for Estimating Mycophenolic Acid Exposure on Day 7 Post-Transplant for Two Mycophenolate Mofetil Formulations Derived From 20 Chinese Renal Transplant Recipients. Transplant Proc 2018; 50:1298-1304. [PMID: 29735215 DOI: 10.1016/j.transproceed.2018.02.068] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 02/01/2018] [Accepted: 02/17/2018] [Indexed: 11/18/2022]
Abstract
PURPOSE To assess the pharmacokinetic properties of mycophenolate mofetil (MMF) dispersible tablets and capsules by the enzyme multiplied immunoassay technique (EMIT) in Chinese kidney transplant recipients in the early post-transplantation phase and to develop the equations to predict mycophenolic acid (MPA) area under the 12-hour concentration-time curve (AUC0-12h) using a limited sampling strategy (LSS). METHODS Forty patients who underwent renal transplantation from brain-dead donors were randomly divided into dispersible tablets (Sai KE Ping; Hangzhou Zhongmei Huadong Pharma) and capsules (Cellcept; Roche Pharma, Why, NSW, Australia) groups, and treated with MMF combined with combination tacrolimus and prednisone as a basic immunosuppressive regimen. Blood samples were collected before treatment (0) and at 0.5,1, 1.5, 2, 4, 6, 8, 10, and 12 hours post-treatment and 7 days after renal transplantation. Plasma MPA concentrations were measured using EMIT. LSS equations were identified using multiple stepwise linear regression analysis. RESULTS The peak concentration (Cmax) in the MMF dispersible tablets (MMFdt) group (7.0 ± 2.8) mg/L was reduced compared with that in the MMF capsules (MMFc) group (10.8 ± 6.2 mg/L; P = .012); time to peak concentration in the MMFdt group was 3.2 ± 2.3 hours, which was nonsignificantly elevated compared with that of the MMFc group (2.2 ± 1.7 hours). Three-point estimation formulas were generated by multiple linear regression for both groups: MPA-AUCMMFdt = 3.542 + 3.332C0.5h + 1.117C1.5h + 3.946C4h (adjusted r2 = 0.90, P < .001); MPA-AUCMMFc = 8.149 + 1.442C2h + 1.056C4h + 7.133C6h (adjusted r2 = 0.88, P < .001). Both predicted and measured AUCs showed good consistency. CONCLUSIONS After treatment with MMF dispersible tables or MMF capsules, the Cmax of MPA for the MMFdt group was significantly lower than that of the MMFc group; there was no significant difference in other pharmacokinetic parameters. Three-time point equations can be used as a predictable measure of the AUC0-12h of MPA.
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Affiliation(s)
- W Cai
- Department of Clinical Pharmacy, 303 Hospital of PLA, Nanning, China
| | - Q Cai
- Department of Clinical Pharmacy, 458 Hospital of PLA, Guangzhou, China
| | - N Xiong
- Guangxi Key Laboratory for Transplantation Medicine, Institute of Transplant Medicine, 303 Hospital of PLA, Nanning, China
| | - Y Qin
- Guangxi Key Laboratory for Transplantation Medicine, Institute of Transplant Medicine, 303 Hospital of PLA, Nanning, China
| | - L Lai
- Department of Pharmaceutics, Guangxi Medical University, Nanning, Guangxi, China
| | - X Sun
- Guangxi Key Laboratory for Transplantation Medicine, Institute of Transplant Medicine, 303 Hospital of PLA, Nanning, China.
| | - Y Hu
- Department of Clinical Pharmacy, 303 Hospital of PLA, Nanning, China.
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Cao H, Xie Y, Wang H, Xiao F, Wu A, Li L, Xu Z, Xiong N, Pan K. Flower-like CoP microballs assembled with (002) facet nanowires via precursor route: Efficient electrocatalysts for hydrogen and oxygen evolution. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2017.11.032] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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23
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Xia Y, Xiong N, Huang Y. Relationship between methylation status of RASSF2A gene promoter and endometriosis-associated ovarian cancer. J BIOL REG HOMEOS AG 2018; 32:21-28. [PMID: 29504361] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Relationship between the methylation status of the RASSF2A gene promoter and endometriosis-associated ovarian cancer (EAOC) was explored. Between January 2013 and January 2016, tissue samples were collected from 30 patients diagnosed with ovarian endometriosis cyst (EC group), 30 patients diagnosed with ovarian endometrial adenocarcinoma (OEA group) and 30 patients diagnosed with ovarian clear cell carcinoma (OCC group). Additionally, 30 cases of normal endometrium tissues were collected for the control group. The methylation status of the RASSF2A promoter was evaluated by combined bisulfite restriction enzyme analysis (COBRA). RT-PCR was used to detect the expression level of RASSF2A mRNA in tissues. Relationship between methylation status and RASSF2A mRNA expression level and the patient age, tumor clinical stage, tumor grading and pathological type were analyzed. Results showed that in the OEA and OCC groups, the methylation degrees of the RASSF2A promoter were obviously higher than that of the other two groups. The expression level of RASSF2A mRNA in the OEA and OCC groups was lower than that of the other two groups. The methylation degree of the RASSF2A promoter was related to clinical staging and grading. No relationship between the methylation degree of the RASSF2A promoter and patients age and the pathological type of the tissue was detected. We concluded that the methylation status of the RASSF2A gene promoter could be considered an excellent indicator for early detection of ovarian cancers.
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Affiliation(s)
- Y Xia
- Hubei Provincial Center for Disease Control and Prevention, Wuhan, Hubei, China
| | - N Xiong
- Department of Gynaecology and Obstetrics, Ningbo Women and Childrens Hospital, Ningbo, Zhejiang, China
| | - Y Huang
- Department of Gynaecology and Obstetrics, Ningbo Women and Childrens Hospital, Ningbo, Zhejiang, China
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Wang H, Xie Y, Cao H, Li Y, Li L, Xu Z, Wang X, Xiong N, Pan K. Flower-Like Nickel Phosphide Microballs Assembled by Nanoplates with Exposed High-Energy (0 0 1) Facets: Efficient Electrocatalyst for the Hydrogen Evolution Reaction. ChemSusChem 2017; 10:4899-4908. [PMID: 28971593 DOI: 10.1002/cssc.201701647] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 09/25/2017] [Indexed: 06/07/2023]
Abstract
The fabrication of low-cost and earth-abundant electrocatalysts for the hydrogen evolution reaction (HER) over a broad pH range is attractive. In this work, a facile precursor route is developed to synthesize flower-like nickel phosphide microballs with a diameter of approximately 12 μm. With a controlled phosphorization temperature, flower-like nickel phosphide microballs with different crystalline structures (Ni5 P4 and Ni2 P) were obtained easily. Flower-like Ni5 P4 microballs possessed two advantageous features for enhanced HER: fast vectorial electron transfer path along the building block nanoplates and enhanced inherent catalytic activity of each active site for high-energy (0 0 1) facets. The flower-like Ni5 P4 microballs electrocatalyst thus displayed excellent activity for the HER with a low overpotential (η) of 35.4 mV to reach current densities of 10 mA cm-2 and a small Tafel slope of 48 mV dec-1 in acid solution. In addition, it showed excellent activity in 1 m KOH with η=47 mV at 10 mA cm-2 . DFT studies indicated that the free energy of hydrogen adsorbed on the Ni site of Ni5 P4 was 0.152 eV, which is smaller than that of the Ni site of Ni2 P (0.182 eV). Therefore, flower-like Ni5 P4 microballs exhibited better HER activity than Ni2 P, which is consistent with our HER data. This hierarchical structure with exposed high-energy (0 0 1) facets paves the way to design and synthesize low-cost, high-performance catalysts for the HER.
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Affiliation(s)
- Honglei Wang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin, 150080, P. R. China
| | - Ying Xie
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin, 150080, P. R. China
| | - Hongshuai Cao
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin, 150080, P. R. China
| | - Yanchao Li
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin, 150080, P. R. China
| | - Lin Li
- Key Laboratory for Photonic and Electric Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin, 150025, P. R. China
| | - Zhikun Xu
- Key Laboratory for Photonic and Electric Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin, 150025, P. R. China
| | - Xiuwen Wang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin, 150080, P. R. China
| | - Ni Xiong
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin, 150080, P. R. China
| | - Kai Pan
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin, 150080, P. R. China
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Wang X, Xie Y, Bateer B, Pan K, Jiao Y, Xiong N, Wang S, Fu H. Selenization of Cu 2ZnSnS 4 Enhanced the Performance of Dye-Sensitized Solar Cells: Improved Zinc-Site Catalytic Activity for I 3. ACS Appl Mater Interfaces 2017; 9:37662-37670. [PMID: 29019395 DOI: 10.1021/acsami.7b09642] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Cu2ZnSnS4 (CZTS) and Cu2ZnSn(S,Se)4 (CZTSSe) as promising photovoltaic materials have drawn much attention because they are environmentally benign and earth-abundant elements. In this work, the monodispersed, low-cost Cu2ZnSnS4 nanocrystals with small size have been controllably synthesized via a wet chemical routine. And CZTSSe could be easily prepared after selenization of CZTS. When they are employed as counter electrodes (CEs) for dye-sensitized solar cells (DSSCs), the power conversion efficiency (PCE) has been improved from 3.54% to 7.13% as CZTS is converted to CZTSSe, which is also compared to that of Pt (7.62%). The exact reason for the enhanced catalytic activity of I3- is discussed with the work function and density functional theory (DFT) when CZTSSe converted from CZTS. The results of a Kelvin probe suggest that the work function of CZTSSe (5.61 eV) is closer to that of Pt (5.65 eV) and higher than that of CZTS, which matched the redox shuttle potential better. According to the theory calculation, all the atomic and bond populations changed significantly when Se replaced partly the S on the CZTS system, especially in the Zn site. During the catalytic process as CEs, the adsorption energy obviously increased compared to those at other sites when I3- adsorbed on the Zn site in CZTSSe. So, Zn plays an important role for the reduction of I3- after CZTS is converted to CZTSSe. Based on above analysis, the reason for enhanced performance of DSSCs when CZTS converted to CZTSSe is mainly due to the enhancement of Zn-site activity. This work is beneficial for understanding the catalytic reaction mechanism of CZTS(Se) as CEs of DSSCs.
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Affiliation(s)
- Xiuwen Wang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University , Harbin 150080, People's Republic of China
| | - Ying Xie
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University , Harbin 150080, People's Republic of China
| | - Buhe Bateer
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University , Harbin 150080, People's Republic of China
| | - Kai Pan
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University , Harbin 150080, People's Republic of China
| | - Yanqing Jiao
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University , Harbin 150080, People's Republic of China
| | - Ni Xiong
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University , Harbin 150080, People's Republic of China
| | - Song Wang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University , Harbin 150080, People's Republic of China
| | - Honggang Fu
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University , Harbin 150080, People's Republic of China
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Xiong N, Brewer MT, Anderson KL, Carlson SA. Non-typhoidal Salmonella encephalopathy involving lipopolysaccharide in cattle. Vet Microbiol 2012; 162:285-7. [PMID: 22939987 DOI: 10.1016/j.vetmic.2012.08.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Revised: 08/08/2012] [Accepted: 08/10/2012] [Indexed: 11/25/2022]
Abstract
This study assessed the involvement of lipopolysaccharide (LPS) in the non-typhoidal Salmonella encephalopathy (NTSE) caused by a unique isolate of Salmonella enterica serovar Saint-paul (SstpNPG). NTSE was prevented by genetic (deletion of murE) or pharmacologic (polymyxin) disruption of LPS on SstpNPG although the disruption of LPS did not deter brain penetration of the strain. This is the first study to demonstrate that LPS is involved in the manifestations of NTSE.
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Affiliation(s)
- N Xiong
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA
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Jin J, Xu K, Xiong N, Liu Y, Li G. Multi-index evaluation algorithm based on principal component analysis for node importance in complex networks. IET Networks 2012. [DOI: 10.1049/iet-net.2011.0013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Xiong N, Jia M, Chen C, Xiong J, Zhang Z, Huang J, Hou L, Yang H, Cao X, Liang Z, Sun S, Lin Z, Wang T. Potential autophagy enhancers attenuate rotenone-induced toxicity in SH-SY5Y. Neuroscience 2011; 199:292-302. [PMID: 22056603 DOI: 10.1016/j.neuroscience.2011.10.031] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Revised: 10/16/2011] [Accepted: 10/17/2011] [Indexed: 12/11/2022]
Abstract
Recent studies have shown that autophagy upregulation may be a tractable therapeutic intervention for clearing the disease-causing proteins, including α-synuclein, ubiquitin, and other misfolded or aggregated proteins in Parkinson's disease (PD). In this study, we explored a novel pharmacotherapeutic approach to treating PD by utilizing potential autophagy enhancers valproic acid (VPA) and carbamazepine (CBZ). Pretreatment with VPA (3 mM) and CBZ (50 μM) along with positive control rapamycin (Rap, 0.2 μM) or lithium (LiCl, 10 mM) significantly enhanced cell viability, decreased rotenone-induced nuclear fragmentation and apoptosis, ameliorated the decrease in mitochondrial membrane potential, reduced reactive oxygen species generation in the human neuroblastoma SH-SY5Y cells. Specifically, the numbers of lysosomes and autophagic vacuolar organelles were increased and the microtubule-associated protein 1 light chain 3-II (LC3-II) expression was up-regulated by VPA, CBZ, Rap, and LiCl (53%, 31%, 72%, and 63%), suggesting that these agents activated autophagic pathways. Moreover, pretreatment with the autophagy inhibitor chloroquine (Chl, 10 μM) remarkably strengthened rotenone toxicity in these cells. Our results suggest that VPA and CBZ, the most commonly used anti-epilepsy and mood-stabilizing medications with low-risk and easy administration might be potential therapeutics for PD.
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Affiliation(s)
- N Xiong
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hubei 430022, China
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Huang J, Xiong N, Chen C, Xiong J, Jia M, Zhang Z, Cao X, Liang Z, Sun S, Lin Z, Wang T. Glyceraldehyde-3-phosphate dehydrogenase: activity inhibition and protein overexpression in rotenone models for Parkinson's disease. Neuroscience 2011; 192:598-608. [PMID: 21736921 DOI: 10.1016/j.neuroscience.2011.06.050] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Revised: 06/13/2011] [Accepted: 06/17/2011] [Indexed: 12/21/2022]
Abstract
Rotenone, a widely used pesticide and an environmental risk factor for Parkinson's disease (PD), induces nigrostriatal injury, Lewy body-like inclusions, and Parkinsonian symptoms in rat models for PD. Our previous data indicated that glyceraldehyde-3-phosphate dehydrogenase (GAPDH) overexpression and glycolytic inhibition were co-current in rotenone-induced PC12 (rat adrenal pheochromocytoma cells) cell death. However, whether GAPDH overexpression plays any role in dopaminergic neurodegeneration in vivo remains unknown. In this study, we have found that GAPDH overexpression and GAPDH-positive Lewy body-like aggregates in nigral dopaminergic neurons while nigral GAPDH glycolytic activity decreases in rotenone-based PD animal models. Furthermore, GAPDH knockdown reduces rotenone toxicity significantly in PC12. These in vitro and in vivo data suggest that GAPDH contributes to the pathogenesis of Parkinson's disease, possibly representing a new molecular target for neuroprotective strategies and alternative therapies for PD.
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Affiliation(s)
- J Huang
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Abstract
A number of soluble and membrane-associated proteins are known to mediate platelet:leukocyte interactions. Platelet-derived factors that have attracted the most attention to date include transforming growth factor beta, interleukin 1 and platelet factor 4. Recently, we have uncovered another protein within platelets that has leukocyte modulatory activity. It was previously characterized as an endometrial glycoprotein named placental protein 14 (PP14) with suppressive effects upon lymphocyte proliferation, pro-inflammatory cytokine production and natural killer cell function. The "hematopoietic" PP14 derived from cells of the megakaryocytic lineage shares this immunosuppressive property, as evaluated by two-way mixed lymphocyte cultures. Interestingly, two alternatively spliced hematopoietic PP14 mRNAs have been cloned which differ in their encoded proteins. Cell-free translation and transfection analyses have verified the translatability of both PP14 mRNA species and allowed for the analysis of their glycosylation properties. PP14, a member of the lipocalin structural superfamily of proteins, now offers an intriguing new link between the coagulation and immune systems.
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Affiliation(s)
- M L Tykocinski
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106-4943, USA
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Peng FR, Chen CF, Xiong N. [Making up prescriptions via computer network in the central pharmacy]. Zhonghua Hu Li Za Zhi 1997; 32:525-6. [PMID: 9495989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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33
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Xiong N. 25 cases of cystoparalysis following gynecological surgery treated with herbal drugs and acupuncture. J TRADIT CHIN MED 1994; 14:276-8. [PMID: 7877338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- N Xiong
- Jiangxi Provincial Maternity Hospital, Nanchang
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Morrow DM, Xiong N, Getty RR, Ratajczak MZ, Morgan D, Seppala M, Riittinen L, Gewirtz AM, Tykocinski ML. Hematopoietic placental protein 14. An immunosuppressive factor in cells of the megakaryocytic lineage. Am J Pathol 1994; 145:1485-95. [PMID: 7992851 PMCID: PMC1887503] [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] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Placental protein 14 (PP14), an immunosuppressive molecule previously known to be expressed in the female and male reproductive tracts only, was shown to be expressed by hematopoietic cells of the megakaryocytic lineage. Northern blot analysis confirmed the induction specificity of PP14 mRNA in phorbol ester-treated K562 cells. Potent immunosuppressive activity in conditioned medium from phorbol ester-treated K562 cells was attributed to hematopoietic PP14 by anti-PP14 antibody blocking. Immunoprecipitation with anti-PP14 antibodies from conditioned medium revealed two distinct PP14 protein isoforms, designated PP14.1 and PP14.2. Polymerase chain reaction cloning and analysis demonstrated the presence of distinct mRNA counterparts to PP14.1 and PP14.2 that had not been resolved by Northern blot analyses. Hematopoietic PP14.1 mRNA corresponds in size to endometrial PP14 mRNA, whereas the smaller hematopoietic PP14.2 mRNA displays an internal in-frame 66-nucleotide deletion that can be explained by alternative splicing and predicts a 22-amino-acid deletion in the encoded gene product. Both PP14 mRNA isoforms were additionally detected by reverse transcriptase polymerase chain reaction analyses in two human megakaryocytic cell lines and in normal human megakaryocytes and platelets. PP14 mRNA was not detected by reverse transcriptase polymerase chain reaction in a panel of nonhematopoietic, nonendometrial tissues examined. The finding of hematopoietic PP14 within the megakaryocytic lineage provides an additional regulatory link between the coagulation and immune systems in normal and pathological settings.
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Affiliation(s)
- D M Morrow
- Institute of Pathology, Case Western Reserve University, Cleveland, Ohio 44106-4943
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