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Deciphering fungal metabolon coupling tandem inverse-electrondemand Diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

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Science China Chemistry 2025年第1期68卷 288-296页

作者： Shuai Liu Wen-Qiang Xu Ying-Tong Di Man-cheng tang Ding-Kang Chen Ming-Ming Cao Yao-Wen Chang Hong-Yu tang Chun-Mao Yuan Jun-Bo Yang Zhi-Li Zuo Han Guo Zi-Fei Xu Ying Zeng Yun-Dong Wu Xiao-Jiang Hao Key Laboratory of Phytochemistry and Natural Medicines (Chinese Academy of Sciences) Kunming Institute of Botany Chinese Academy of Sciences University of Chinese Academy of Sciences Lab of Computational Chemistry and Drug Design State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen Bay Laboratory State Key Laboratory of Microbial Metabolism School of Life Sciences & Biotechnology Shanghai Jiao Tong University State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest China Kunming Institute of Botany Chinese Academy of Sciences Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of Botany Chinese Academy of Sciences Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical Sciences

In the intricate process of natural product biosynthesis, a metabolon can enhance metabolic flux by associating sequential enzymes. A fungal metabolon, comprising of flavin-dependent monooxygenase Spe F and P450 monooxygenase Spe G, is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide B. Using notoamide E as a substance, Spe F/Spe G metabolon can control the stereoselectivity of its 2,3-epoxidation, followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-m A with dienyl iminium unit. Subsequently,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand Diels-Alder reaction and semipinacol rearrangement. This provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

关键词： metabolon Diels-Alder reaction semipinacol rearrangement biosynthesis notoamides spiro polycyclic alkaloids

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Recent progress on the prediction of two-dimensional materials using CALYPSO

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Chinese Physics B 2019年第10期28卷 62-72页

作者： cheng tang Aijun Du School of Chemistry Physics and Mechanical Engineering Queensland University of Technology Gardens Point Campus

In recent years, structure design and predictions based on global optimization approach as implemented in CALYPSO software have gained great success in accelerating the discovery of novel two-dimensional(2D) materials. Here we highlight some most recent research progress on the prediction of novel 2D structures, involving elements, metal-free and metal-containing compounds using CALYPSO package. Particular emphasis will be given to those 2D materials that exhibit unique electronic and magnetic properties with great potentials for applications in novel electronics, optoelectronics,magnetronics, spintronics, and photovoltaics. Finally, we also comment on the challenges and perspectives for future discovery of multi-functional 2D materials.

关键词： CALYPSO methodology two-dimensional materials structural prediction

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Association between age at diagnosis of diabetes and ocular disease:Insights from a recent article

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World Journal of Diabetes 2025年第1期16卷 211-216页

作者： Shi-Qi Liu Dong Wang cheng-Chun tang Department of Cardiology Zhongda HospitalSoutheast UniversityNanjing 210009Jiangsu ProvinceChina School of Medicine Southeast UniversityNanjing 210009Jiangsu ProvinceChina

In this article,we discuss Ye et al's recent article on the association between age at diabetes diagnosis and subsequent risk of age-related ocular *** study,which utilized United Kingdom Biobank data,highlighted a strong link between early diabetes onset and major eye conditions,such as cataracts,glaucoma,agerelated macular degeneration,and vision loss,independent of glycemic control and disease *** finding challenges the previous belief that diabetic eye disease primarily correlates with *** lifestyles evolve and the age of diabetes diagnosis decreases,understanding this relationship may reveal the complex pathogenesis underlying diabetes-related *** editorial summarizes potential mechanisms connecting the age of diabetes onset with four types of ocular diseases,emphasizing the significance of early diagnosis.

关键词： Diabetes Age at diagnosis Cataract Glaucoma Age-related macular disease Vision acuity

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Tailoring Morphology of PVDF-HFP Membrane via One-step Reactive Vapor Induced Phase Separation for Efficient Oil-Water Separation

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Chinese Journal of Polymer Science 2021年第5期39卷 610-619,I0007页

作者： Peng Huo cheng-tang Zhong Xiao-Peng Xiong Department of Materials Science and Engineering College of MaterialsXiamen UniversityXiamen 361005China

Poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)receives increasing attention in membrane separation field based on its advantages such as high mechanical strength,thermal and chemical ***,controlling the microporous structure is still *** this work,we attempted to tailor the morphology of PVDF-HFP membrane via a one-step reactive vapor induced phase separation ***,PVDF-HFP was dissolved in a volatile solvent and then was cast in an ammonia water vapor *** complete evaporation of solvent,membranes with adjustable porous structure were prepared,and the microstructures of the membranes were analyzed by scanning electron microscopy,Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy and X-ray diffraction *** on the results,a mechanism of dehydrofluorination induced cross-linking of PVDF-HFP has been suggested to understand the morphology *** our knowledge,this is the first report of one-step reactive vapor induced phase separation strategy to tailor morphology of PVDF-HFP *** addition,the membranes prepared in the ammonia water vapor exhibited enhanced mechanical strength and achieved satisfactory separation efficiency for water-in-oil emulsions,suggesting promising potential.

关键词： PVDF-HFP Membrane Tailoring Vapor induced phase separation Oil-water separation

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Critical Scaling Behaviors of Entanglement Spectra

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Chinese Physics Letters 2020年第1期37卷 1-5页

作者： Qi-cheng tang Wei Zhu School of Science Westlake UniversityHangzhou 3100242 Institute of Natural Sciences Westlake Institute of Advanced StudyHangzhou 310024

We investigate the evolution of entanglement spectra under a global quantum quench from a short-range correlated state to the quantum critical *** by the conformal mapping,we find that the dynamical entanglement spectra demonstrate distinct finite-size scaling behaviors from the static *** a prototypical example,we compute real-time dynamics of the eritanglement spectra of a one-dimensional transverse-field Ising *** simulation confirms that the entanglement spectra scale with the subsystem size I as for the dynamical equilibrium state,much faster thanαIn^-1 l for the critical ground *** particular,as a byproduct,the entanglement spectra at the long time limit faithfully gives universal tower structure of underlying Ising criticality,which shows the emergence of operator-state correspondence in the quantum dynamics.

关键词： dynamics. quantum angle

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Long-term outcome and efficacy of endoscopic hemorrhoid ligation for symptomatic internal hemorrhoids

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World Journal of Gastroenterology 2011年第19期17卷 2431-2436页

作者： cheng-tang Chiu Chen-Ming Hsu Department of Gastroenterology and Hepatology Lin-Kou Chang Gung Memorial HospitalChang Gung University College of Medicine

AIM:To assess the long-term outcome of endoscopic hemorrhoid ligation (EHL) for the treatment of symptomatic internal ***:A total of 759 consecutive patients (415 males and 344 females) were *** presentations were rectal bleeding (593 patients) and mucosal prolapse (166 patients).All patients received EHL at outpatient *** severity was classified by Goligher's *** mean follow-up period was 55.4 mo (range,45-92 mo).RESULTS:The number of band ligations averaged 2.35 in the first session for bleeding and 2.69 for prolapsed *** was controlled in 587 (98.0%) patients,while prolapse was reduced in 137 (82.5%) *** treatment,93 patients experienced anal pain and 48 patients had mild *** subjective satisfaction was 93.6%.Repeat treatment or surgery was performed if symptoms were not relieved in the first *** the bleeding group,the recurrence rate was 3.7% (22 patients) at 1 year,and 6.6%and 13.0% at 2 and 5 *** the prolapsed group,the recurrence rate was 3.0%,9.6% and 16.9% at 1,2 and 5 years,***:EHL is an easy and well-tolerated procedure for the treatment of symptomatic internal hemorrhoids,with good long-term results.

关键词： Bleeding Endoscopy Hemorrhoid Ligation Prolapsed

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Pumpkin-like MoP-MoS_(2)@Aspergillus niger spore-derived N-doped carbon heterostructure for enhanced potassium storage

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Journal of Energy Chemistry 2022年第9期31卷 479-486,I0013页

作者： Daoguang Sun cheng tang Hui cheng Weilan Xu Aijun Du Haijiao Zhang Institute of Nanochemistry and Nanobiology Shanghai UniversityShanghai 200444China School of Chemistry Physics and Mechanical EngineeringScience and Engineering FacultyQueensland University of TechnologyBrisbaneQueensland 4001Australia

Biomass-derived carbon materials are widely applied in the energy storage and conversion fields due to their rich sources,low price and environmental ***,a unique pumpkin-like MoPMoS_(2)@Aspergillus niger spore-derived N-doped carbon(SNC)composite has been prepared via a simple hydrothermal and subsequent phosphorization ***,the resulting MoP-MoS_(2)@SNC well inherits the pristine morphology of spore carbon,similar to the natural pumpkin,with hollow interiors and uneven protrusions on the *** special structure allows it to have sufficient space to fully contact the electrolyte and greatly reduces the ion transport *** theory calculations further demonstrate that the formed MoP-MoS_(2)heterostructure can enhance the adsorption of K ions and electronic *** these unique advantages,the MoP-MoS_(2)@SNC anode for potassium storage shows a high reversible capability of 286.2 mAh g&(-1) at 100 mA g^(-1) after 100 cycles and superior rate *** enhanced electrochemical performance is mainly related to the unique pumpkin-like morphology of SNC and the construction of MoP-MoS_(2)heterostructure,as well as their perfect *** study provides a feasible design idea for developing green,low-cost,and high-performance electrode materials for next-generation energy storage.

关键词： MoP-MoS_(2)heterostructure Aspergillus niger spore Phosphorization Nitrogen doping Potassium-ion batteries

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Purely one-dimensional ferroelectricity and antiferroelectricity from van der Waals niobium oxide trihalides

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npj Computational Materials 2021年第1期7卷 1225-1231页

作者： Lei Zhang cheng tang Stefano Sanvito Aijun Du School of Chemistry and Physics Queensland University of TechnologyBrisbaneAustralia Centre for Materials Science Queensland University of TechnologyBrisbaneAustralia School of Physics and CRANN Institute Trinity CollegeDublin 2Ireland

Intrinsic one-dimensional(1D)ferroelectric materials are rarely reported but are highly sought to break the size limit of nanostructured conventional ***,we report a class of inborn 1D ferroelectric nanowires,namely 1D NbOX_(3)(X=Cl,Br,and I),that can be directly obtained from experimentally realized van der Waals *** addition to the sizable spontaneous polarization,1D NbOX_(3) exhibits low ferroelectric switching barriers,small coercive electric fields,and high critical temperature,governed by the hybridization of the Nb empty d orbitals and the O p orbitals(d^(0) rule).Moreover,the double-channel structure of 1D NbOX_(3) also enables the emergence of 1D antiferroelectric metastable *** findings not only propose a class of 1D ferroelectric materials toward the development of miniaturized and high-density electronic devices,but also pave an avenue of obtaining intrinsic 1D ferroelectrics from van der Waals crystals.

关键词： ferroelectric metastable governed

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Microstructure evolution and grain refinement mechanism of rapidly solidified single-phase copper based alloys

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Journal of Materials Science & Technology 2022年第33期128卷 160-179页

作者： Xiaolong Xu cheng tang Hongfu Wang Yukang An Yuhong Zhao College of Materials Science and Engineering School of Mechanical EngineeringNorth University of ChinaTaiyuanShanxi 030051China

The Cu65Ni35,Cu60Ni40 and Cu55Ni45 alloys were undercooled by fluxing method,and the rapid solidification structure with different undercoolings were also *** the same time,the interface migration process during rapid solidification was photographed by high-speed photography,and the relationship between the morphological characteristics of solidification front and undercooling was *** microstructures of the three alloys were observed by metallographic microscope,and the microstructure characteristics and evolution law were systematically *** was found that two grain refinement events occurred in the low undercooling range and high undercooling range,*** EBSD test of grain refined microstructures showed that the microstructure in the low undercooling range has a high proportion of low-angle grain boundaries and high strength ***,there were a large proportion of high-angle grain boundaries and a high proportion of twin grain boundaries and more randomly oriented grains in the microstructure in the high undercooling *** TEM test of the Cu55Ni45 alloy with the maximum undercooling of 284 K showed that there were high-density dislocation networks and stacking faults in the ***,the evolution relationship between microstructure hardness and undercooling was systematically *** was found that the microhardness of the three alloys decreased sharply near the critical *** with EBSD,TEM and microhardness analysis,it was confirmed that the grain refinement under low undercooling was caused by dendrite remelting,while the grain refinement under high undercooling was caused by stress-induced recrystallization.

关键词： Rapid solidification structure Grain refinement Dendrite remelting Recrystallization

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Tuning band alignment and optical properties of 2D van der Waals heterostructure via ferroelectric polarization switching

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Frontiers of physics 2020年第6期15卷 25-31页

作者： Dimuthu Wijethunge Lei Zhang cheng tang Alijun Du School of Chemistry and Physics Queensland Unsversity of TechnologyGardens Point CampusBrisbaneQLD 4000Australia Centre for Materials Science Queensland University of TechnologyGardens Point CampusBrisbaneQLD 4000Australia

Favourable band alignment and excellent visible light response are vital for photochemical water *** this work,we have theoretically investigated how ferroelectric polarization and its reversibility in direction can be utilized to modulate the band alignment and optical absorption *** this objective,2D van der Waals heterostructures(HTSs)are constructed by interfacing monolayer M0 S2 with ferroelectric In2 *** find the switch of polarization direction has dramatically changed the band alignment,thus facilitating different type of *** Iri2 Se3/MoS2/In2 Se3 heterostructures,one polarization direction supports hydrogen evolution reaction and another polarization direction can favour oxygen evolution *** can be used to create tuneable photocatalyst materials where water reduction reactions can be selectively controlled by polarization *** modulation of band alignment is attributed to the shift of reaction potential caused by spontaneous ***,the formed type-II van der Waals HTSs also significantly improve charge separation and enhance the optical absorption in the visible and infrared *** results pave a way in the design of van der Waals HTSs for water splitting using ferroelectric materials.

关键词： photocatalyst ferroelectric M0S2 In2 Se3 heterostructures water splitting 2D materials

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