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Single co Atom catalyst Derived from Terpolymer Pyrolysis for Hydrogenation of Nitroarenes

cHEMcATcHEM 2025年第7期17卷

作者： Zhou, Yanan Guo, Anni Shen, Huawei Wang, Yue Zhang, Fuxing Rong, Xuejiao Li, Yang Yan, Xilong chen, Ligong Wang, Bowei Tianjin Univ Sch Chem Engn & Technol Tianjin 300350 Peoples R China Shaoxing Xingxin New Mat Co Ltd Shaoxing 312300 Zhejiang Peoples R China Tianjin Renai Coll Dept Chem Engn Tianjin 301636 Peoples R China Tianjin Engn Res Ctr Funct Fine Chem Tianjin 300350 Peoples R China Collaborat Innovat Ctr Chem Sci & Engn Tianjin Tianjin 300072 Peoples R China Tianjin Univ Zhejiang Inst Shaoxing 312300 Zhejiang Peoples R China

Recently, single atom catalysts (SAcs) with isolated metal atom as the active site have received extensive attention for their excellent catalytic performance. However, limited by the strong aggregation tendency of monometallic atoms, the construction of SAcs remains a formidable challenge. Herein, we developed a facile ternary copolymerization-pyrolysis approach to synthesize a single cobalt atom catalyst (co1@Nc) by employing amino-functionalized cobalt phthalocyanine (coPc(NH2)4) as the metal precursor. Specially, coPc(NH2)4 was copolymerized with melamine and 1,4-phthalaldehyde to yield a terpolymer, thereby allowing coPc to be more uniformly and stably distributed in the polymer network. Subsequently, the obtained terpolymer was pyrolyzed to afford co1@Nc. Aberration-corrected high-angle annular dark-field scanning transmission electron microscopy (Ac HAADF-STEM) and X-ray absorption spectroscopy (XAS) directly confirmed that the catalyst co1@Nc was a single cobalt atom catalyst. Furthermore, the large specific surface area (SBET = 418.8 m2/g) and high cobalt content (2.71 wt%) of co1@Nc provided more cobalt active sites and therefore displayed excellent catalytic activity in the hydrogenation of nitrobenzene. In addition, the catalyst showed remarkable cyclic stability in five cycles and remained as the single atom catalyst.

关键词： Amino-functionalization chemoselective hydrogenation co & horbar N & horbar c Single atom catalysts Terpolymer

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Fabrication and investigation on mechanical properties of (AA7075/cr 3 c 2 ) metal matrix composites

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Materials Today: Proceedings 2020年 23卷 513-517页

作者： V. Ramakoteswara Rao J. Rangaraya chowdary S.P. Kumar Gudapati Mechanical Engineering R. V. R & J. C College of Engineering (A) Guntur 522019 India Mechanical Engineering V. R. Siddhartha Engineering College (A) Kanuru 520007 India

This work explained about the hardness, density and tensile behavior of AMMcs and also recognizes the influence of cr 3 c 2 into AA7075 under casting process on their mechanical properties. The composites are obtained through stir casting process with 2.5, 5 and 7.5 wt% of cr 3 c 2 . It is observed that the mechanical properties of the composites are increased with increasing weight percentage of reinforced material. The results are analyzed with optical micro structural images. The optimum hardness and tensile strength were observed at 5 wt% cr 3 c 2 composite than other wt% of composites as well as monolithic base material.

关键词： AA7075 cr 3 c 2 Metal matrix composites Stir casting method Mechanical properties

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High prevalence of occult hepatitis c infection in predialysis patients

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World Journal of Hepatology 2019年第1期11卷 109-118页

作者： Luís Henrique Bezerra cavalcanti Sette Edmundo Pessoa de Almeida Lopes Nathália campello Guedes dos Anjos Lucila Maria Valente Sávio Augusto Vieira de Oliveira Norma Lucena-Silva Nephrology-Department of Clinical Medicine Federal University of Pernambuco Gastroenterology-Department of Clinical Medicine Federal University of Pernambuco Laboratory of Immunogenetics of the Aggeu Magalh?es Institute - Fiocruz Pernambuco

BAcKGROUND Occult hepatitis c virus(HcV) infection(OcI) may be associated with extrahepatic diseases and it is known that the patients with chronic kidney disease(cKD) who are on hemodialysis(HD) present a higher prevalence of this type of infection than the general population, with a worse clinical ***, there are no data in the literature to assess the presence of OcI in patients prior to the initiation of renal replacement therapy(RRT). Therefore, this study aimed to evaluate the occurrence and epidemiological aspects of OcI in patients with Predialysis cKD. We hypothesize that this infection could occur before RRT *** To research the status in predialysis patients when HD patients have high prevalence of *** A cross-sectional study was conducted between 2015 and 2017. Adults with creatinine clearance < 60 mL/min·1.73 m^2(predialysis patients) were recruited to the study. Pregnant and postpartum women, patients with glomerulopathies,and patients showing positivity for serological markers of hepatitis B virus(HBV), HcV or human immunodeficiency virus infection were excluded. Patients were diagnosed with OcI according to test results of anti-HcV antibody negativity and HcV RNA positivity in either ultracentrifuged serum or, if serumnegative, in peripheral blood mononuclear *** Among the 91 total patients included in the study, the prevalence of OcI was 16.5%. Among these 15 total OcI patients, 1 was diagnosed by 14 ultracentrifuged serum results and 14 were diagnosed by peripheral blood mononuclear cell results. compared to the non-OcI group, the OcI patients presented higher frequency of older age(P = 0.002), patients with cKD of mixed etiology(P = 0.019), and patients with markers of previous HBV infection(i.e.,combined positivity for anti-hepatitis B core protein antibody and anti-hepatitis B surface protein antibody)(P = 0.001).cONcLUSION Among predialysis patients, OcI involved the elderly, patients with cKD of mixed eti

关键词： Occult hepatitis infection chronic hepatitis c chronic kidney disease Hemodialysis Hepatitis c virus-RNA Peripheral blood mononuclear cells

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The intertextual relations created by chinese translations of H. c. Andersen's tales

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ORBIS LITTERARUM 2019年第4期74卷 292-306页

作者： Li, Wenjie Beijing Normal Univ Sch Foreign Languages & Literatures Beijing Peoples R China

The chinese translations of H. c. Andersen's tales date back more than 100 years. His tales have been extensively read by chinese readers and have provided rich resources and inspiration for chinese authors. Ultimately, Andersen's tales have achieved various forms of afterlife in china through translation and the reading of translated texts. At the same time, this afterlife has also enriched meanings of Andersen's tales that were not carried in their original texts. The original texts, their translations and the chinese modern literary works as post-texts have thus woven a net that meshes various types of intertextual relation created by translation practices. The present study will try to present these relations through textual analysis. In addition, through analysing the intertextual relations created by literary translation, this study also attempts to stimulate greater academic interest in the cultural and literary functions of translation, which are two of the important social functions that translation practices may fulfil.

关键词： H c Andersen chinese translations intertextuality modern chinese literature reception

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Silicon-based anode materials for lithium batteries: recent progress, new trends, and future perspectives

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cRITIcAL REVIEWS IN SOLID STATE AND MATERIALS ScIENcES 2024年第2期49卷 221-253页

作者： Majeed, Muhammad K. K. Iqbal, Rashid Hussain, Arshad Majeed, M. Umar Ashfaq, M. Zeeshan Ahmad, Muhammad Rauf, Sajid Saleem, Adil Chinese Acad Sci Dalian Inst Chem Phys State Key Lab Catalysis Dalian Peoples R China Univ Texas Arlington Mat Chem Lab Dept Mat Sci & Engn Arlington TX 76019 USA Univ Texas Arlington Ctr Adv Construct Mat Arlington TX 76019 USA Shenzhen Univ Inst Adv Study Coll Mechatron & Control Engn Shenzhen Peoples R China Gomal Univ Inst Phys & Elect Dera Ismail Khan Pakistan Shandong Univ Sch Mat Sci & Engn Jinan Peoples R China

Silicon (Si)-based materials are intensively pursued as the most promising anode materials for next-generation lithium-ion batteries (LIBs) owing to their high theoretical mass-specific capacity, moderate working potential, and high abundance in the earth's crust. Therefore, it has attracted widespread attention both from academia and industries. Despite the above advantages, the electrochemical performance is hampered by severe volume variation, resulting in poor cyclability and subsequently electrode failure. In this regard, nanostructured Si anodes and their composite electrodes might overcome these problems holding back the utilization of Si-based anodes in LIBs by providing facetious strain relaxation, short lithium diffusion distance, improved mass transport, and efficacious electrical contact. This review offers a holistic summary of chemistry, uniqueness, synthetic strategies, and practical applications of Si-based materials with a focus on presenting the development in the Si nanotubes, nanoparticles, nanowires, porous Si, SiOx, their composite materials with carbon, graphene cages, metals, and metal oxides as anode materials in LIBs. In the end, we present the research outlook for the development of Si/SiOx/c-based materials in the future, including fundamental design and various applications in addressing the challenges mentioned earlier.

关键词： Si SiOx nanostructures c M MOx structural design LIBs

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Evaluation of outcomes reported in randomized controlled trials for herbal remedies for adults with chronic hepatitis c

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Journal of Traditional chinese Medical Sciences 2019年第2期6卷 115-121页

作者： Yuqian Yan Ning Liang Shibing Liang Yuxin Sun Nicola Robinson Jianping Liu Centre for Evidence-Based Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China Shanxi University of Chinese Medicine Taiyuan 030619China School of Health and Social Care London South Bank UniversityLondon SE10AAUnited Kingdom

Background:Herbal remedies have been widely utilized in treating chronic hepatitis c (cHc) *** appropriate outcomes to reflect both beneficial and harmful effects is a crucial step in designing randomized controlled trials (RcTs).This study evaluated the outcomes reported in RcTs on herbal remedies for cHc with comparison to the core outcomes recommended by the cochrane Hepato-Biliary Group (cHBG),to check the consistency of the outcomes and to provide recommendation for future ***:A systematic literature search was conducted in Western and chinese databases to identify RcTs on herbal remedies for adults with *** each trial,all the outcomes reported in the results section were *** between trial outcomes and cHBG core outcomes were evaluated and summarized with descriptive ***:A total of 116 RcTs involving 9154 participants were included;27 outcomes were *** reported outcomes included alanine aminotransferase (64 trials,55.2%),adverse events (58 trials,50.0%),and end-of-treatment virological response (50 trials,43.1%).All trials indicated that the herbal remedies under investigation had a positive effect and was markedly more effective than the *** half of the trials reported that the combination of herbal medicine and antiviral drugs could ameliorate adverse *** few trials reported primary core outcomes relating survival and quality of *** most frequently reported core outcomes are non-serious adverse events (54 trials,46.6%),viral response (27 trials,23.3%),and biochemical response (24 trials,20.7%).conclusion:The variation and inconsistency in trial outcomes impedes research synthesis efforts,and indicate the need for comparable outcomes through the development of core outcome sets in *** low concordance of outcome reporting could be improved by following cHBG core outcomes recommendation.

关键词： chronic hepatitis c Herbal core outcome set Randomized controlled trial cochrane Hepato-Biliary Group

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MANAGEMENT OF AcUTE cORNEAL HYDROPS SEcONDARY TO KERATOcONUS BY DEScEMETOPEXY USING INTRAcAMERAL PERFLUOROPROPANE (c3F8 ) – A cASE REPORT

Journal of Health and Allied Sciences NU

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Journal of Health and Allied Sciences NU 2020年第4期01卷 50-52页

作者： Vijay Pai Jayaram Shetty Hrishikesh Amin S. Bhat Divya Lakshmi Professor Dept. of Ophthalmology K.S. Hegde Medical Academy Deralakatte Mangalore - 575 018 Prof. & Head Dept. of Ophthalmology K.S. Hegde Medical Academy Deralakatte Mangalore - 575 018 Assoc. Professor Dept. of Ophthalmology K.S. Hegde Medical Academy Deralakatte Mangalore - 575 018 Sr. Resident Dept. of Ophthalmology K.S. Hegde Medical Academy Deralakatte Mangalore - 575 018

Keratoconus is a clinical term used to describe bilateral non-inflammatory corneal ectasia in its axial part due to which cornea assumes a conical shape

关键词： Keratoconus acute hydrops descemetopexy c F

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Leukocytoclastic vasculitis caused by hepatitis c virus in a liver transplant recipient: A case report

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World Journal of Hepatology 2019年第4期11卷 402-408页

作者： Gustavo de Sousa Arantes Ferreira Andre Luis conde Watanabe Natalia de carvalho Trevizoli Fernando Marcus Felippe Jorge Luiz Gustavo Guedes Diaz Milla carolina costa Lafeta Araujo Gabriela de campos Araujo Amanda de castro Machado Department of Liver Transplantation Instituto de Cardiologia do Distrito Federal Curso de Medicina Universidade Catolica de Brasilia

BAcKGROUND Infection by the hepatitis c virus(HcV) is currently considered to be a global health issue, with a high worldwide prevalence and causing chronic disease in afflicted individuals. The disease largely involves the liver but it can affect other organs, including the skin. While leukocytoclastic vasculitis has been reported as one of the dermatologic manifestations of HcV infection, there are no reports of this condition as the first symptom of HcV recurrence after liver *** SUMMARY We report here a case of leukocytoclastic vasculitis in a liver transplant recipient on maintenance immunosuppression. The condition presented as a palpable purpura in both lower extremities. Blood and urine cultures were negative and all biochemical tests were normal, excepting evidence of anemia and hypocomplementemia. Imaging examination by computed tomography showed a small volume of ascites, diffuse thickening of bowel walls, and a small bilateral pleural effusion. Skin biopsy showed leukocytoclasia and fibrinoid *** biopsy was suggestive of HcV recurrence in the graft, and HcV polymerase chain reaction yielded 11460 copies/mL and identified the genotype as 1 A. Treatment of the virus with a 12-wk direct-acting antiviral regimen of ribavirin, sofosbuvir and daclatasvir led to regression of the symptoms within the first 10 d and subsequent complete resolution of the *** This case highlights the difficulties of diagnosing skin lesions caused by HcVinfection in immunosuppressed patients.

关键词： Hepatitis c Liver transplantation Leukocytoclastic vasculitis Immunosuppression Direct-acting antivirals case report

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Neighborhood persistency of the linear optimization relaxation of integer linear optimization

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MATHEMATIcAL PROGRAMMING 2024年 1-19页

作者： Kimura, Kei Nakayama, Kotaro Kyushu Univ Fac Informat Sci & Elect Engn Fukuoka Japan Oplan Inc Tokyo Japan

For an integer linear optimization (ILO) problem, persistency of its linear optimization (LO) relaxation is a property that for every optimal solution of the relaxation that assigns integer values to some variables, there exists an optimal solution of the ILO problem in which these variables retain the same values. Although persistency has been used to develop heuristic, approximation, and fixed-parameter algorithms for special cases of ILO, its applicability remains unknown in the literature. In this paper, we reveal a maximal subclass of ILO such that its LO relaxation has persistency. Specifically, we show that the LO relaxation of ILO on unit-two-variable-per-inequality (UTVPI) systems has persistency and is (in a certain sense) maximal among such ILO. Our result generalizes the persistency results by Nemhauser and Trotter, Hochbaum et al., and Fiorini et al. Even more, we propose a stronger property called neighborhood persistency and show that the LO relaxation of ILO on UTVPI systems in general has this property. Using this stronger result, we obtain a fixed-parameter algorithm (where the parameter is the optimal value) and another proof of 2-approximability for ILO on UTVPI systems where objective functions and variables are non-negative.

关键词： Integer linear optimization Linear optimization Unit-two-variable-per-inequality system Persistency 90 c 10

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“c语言程序设计”课程思政教学设计研究与实践

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北京政法职业学院学报 2021年第3期 101-108页

作者：辛向丽北京政法职业学院信息媒体学院

高职教育不仅突出学生应用性和实践性的培养,同时注重学生职业能力和职业精神的培养。本文在研究计算机语言类课程教学现状的基础上,深入挖掘专业课程思政元素,进行课程思政整体教学设计和单元教学设计,主要选取工程项目的典型任务,确... 详细信息

高职教育不仅突出学生应用性和实践性的培养,同时注重学生职业能力和职业精神的培养。本文在研究计算机语言类课程教学现状的基础上,深入挖掘专业课程思政元素,进行课程思政整体教学设计和单元教学设计,主要选取工程项目的典型任务,确定任务的三级目标,知识目标、能力目标和思政目标。以知识目标和能力目标作为技术技能切入点,润物细无声地融合课程思政目标,并通过多种方式进行呈现,具体实在,实用见效,在学生中起到了良好的教学效果。

关键词：课程思政 c 语言教学设计三级目标

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