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Dcalycinumines A-E,Alkaloids with Cytotoxic Activities of Nasopharyngeal Carcinoma Cells from Daphniphyllum calycinum

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Chinese Journal of Chemistry 2024年第1期42卷 35-42页

作者： Qing Tang Xiao-Yong Dai Qiang Lin Zhi-Peng Ling Yi-Kun Hao Tian-Xi Zhu Ji-Hui zhang Yi-bo Hou Yao-Lan Li Lai-Qiang Huang Jing-Hao Wang Guo-Cai Wang yu-bo zhang Guangdong Clinical Translational Centerfor Targeted Drug Department of PharmacologySchoolof MedicineJinan University GuangzhouGuangdong 510632China Institute of Traditional Chinese Medicine&Natural Products Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs ResearchCollegeof PharmacyJinan UniversityGuangzhouGuangdong511443China Institute of Biopharmaceutical and Health Engineering Shenzhen Key Laboratory of Gene and Antibody TherapyState Key Laboratory of Chemical OncogenomicsShenzhen International Graduate SchoolTsinghua UniversityShenzhenGuangdong 518055China The Guangzhou Key Laboratoryof Basic and Translational Research on Chronic Disease Department of PharmacyThe First Affiliated HospitalJinan UniversityGuangzhouGuangdong 510630China

Fivenovel Daphniphyllum alkaloids,named dcalycinumines A-E(1-4,6),andeight previously described Daphniphyllum alkaloids(5,7-13)were isolated from Daphniphyllum *** 1 is the first Daphniphyllum alkaloid possessing a highly rearranged 6/6/6/7/5/6 hexacyclic architecture with a unique 3-methyl-1-azabicyclo[4,4,0]decane ring *** 2 represents a rare diamino Daphniphyllum alkaloid with an unprecedented 6/5/5/6/6/5 carbon skeleton featuring a unique 1-aza-6-azaspiro[4,5]decane unit,whereas 3 also represents a rare diamino Daphniphyllum alkaloid as a possible precursor of *** 4 is the second example of c-22-nor yuzurimine-type *** structures and absolute configurations were elucidated by HRESIMS,NMR spectroscopic analyses,EcD calculations,and single-crystal X-ray ***,compound 1 showed remarkable antitumor activities,which could inhibit the proliferation,migration and invasion of nasopharyngeal carcinoma cells,and promoted nasopharyngeal carcinoma cells apoptosis.

关键词： Daphniphyllum calycinum Natural products Daphniphyllum alkaloid Structural elucidation Biological activity Apoptosis Nasopharyngealcarcinoma

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Game Theory and the Evolution of Cooperation

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Journal of the Operations Research Society of China 2022年第2期10卷 379-399页

作者： bo-yu zhang Shan Pei Laboratory of Mathematics and Complex Systems Ministry of EducationSchool of Mathematical SciencesBeijing Normal UniversityBeijing 100875China

Evolution is based on the competition between individuals and therefore rewards only selfish *** cooperation or altruism behavior could prevail in social dilemma then becomes a problematic *** theory offers a powerful mathematical approach for studying social *** has been widely used to explain the evolution of *** this paper,we first introduce related static and dynamic game *** we review two types of mechanisms that can promote cooperation in groups of genetically unrelated individuals,(i)direct reciprocity in repeated games,and(ii)incentive mechanisms such as reward and punishment.

关键词： Cooperation Game theory Direct reciprocity Reward Punishment

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圆韧带悬吊联合腹腔镜子宫全切术对患者术后阴道膨出的影响

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中华疝和腹壁外科杂志（电子版） 2024年第4期18卷 433-436页

作者：田淞宇张明月张宇博 150081　哈尔滨医科大学附属肿瘤医院妇科 150081　哈尔滨医科大学附属肿瘤医院麻醉科

目的:探究圆韧带悬吊联合腹腔镜子宫全切术对患者术后阴道膨出的影响。方法:回顾性分析2017年1月至2022年12月，哈尔滨医科大学附属肿瘤医院收治的行腹腔镜子宫全切术的患者的资料，按手术方式不同分为常规组（102例，采用常规腹腔镜子... 详细信息

目的:探究圆韧带悬吊联合腹腔镜子宫全切术对患者术后阴道膨出的影响。方法:回顾性分析2017年1月至2022年12月，哈尔滨医科大学附属肿瘤医院收治的行腹腔镜子宫全切术的患者的资料，按手术方式不同分为常规组（102例，采用常规腹腔镜子宫全切术）和联合组（98例，在常规组基础上联合圆韧带悬吊术）。比较2组患者手术相关指标，术后1、3、6、12个月阴道膨出发生率及术后并发症发生率，盆底肌肉肌力和性生活质量水平。结果:2组手术相关指标比较，差异无统计学意义（P>0.05）;术后3、6个月，联合组阴道膨出发生率显著低于常规组（P0.05）;术后3、6个月，联合组盆底肌肉肌力情况（Ⅰ类和Ⅱ类盆底肌纤维平均肌电压）均显著高于常规组（P<0.05）;术后6、12个月，联合组性生活质量评分显著高于常规组（P<0.05）。结论:联合圆韧带悬吊术可以有效降低腹腔镜子宫全切术患者术后阴道膨出的发生率，对盆底肌影响较小，能有效改善术后性生活质量。

关键词：腹腔镜子宫全切术阴道膨出圆韧带悬吊术

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Effect of ultrasonic treatment on formation of iron-containing intermetallic compounds in AlSi alloys

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China Foundry 2016年第5期13卷 316-321页

作者： yu-bo zhang Svynarenko Kateryna Ting-ju Li Laboratory of Special Processing of Raw Materials and School of Materials Science and Engineering Dalian University of Technology Dalian Liaoning 116024 China

Iron is generally regarded as an unavoidable impurity in Al-Si casting alloys. The acicular AlaFe and β-AI5FeSi （or Al9Si2Fe2） are common iron-containing intermetallic compounds （IMCs） in conventional structure which have a detrimental impact on the mechanical properties. In this paper, ultrasonic field （USF） was applied to modify acicular iron phases in Al-12%Si-2%Fe and Al-2%Fe alloys. The results show that the USF applied to AI-Fe alloys caused the morphological transformation of both primary and eutectic Al3Fe from acicular to blocky and granular without changes in their composition. In the case of AI-Si-Fe alloys, ultrasonic treatment led to both morphological and compositional conversion of the temary iron IMCs. When the USF was applied, the acicular/3-Al9Si2Fe2 was substituted by star-like α-Al12Si2Fe3. The modification rate of both binary and ternary iron IMCs relates to the USF treatment duration. The undercooling induced by the ultrasonic vibration contributes to the nucleation of intermetallics and can explain the transformation effect.

关键词： ultrasonic treatment Al-Si alloy iron-containing intermetallics modification

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Behavior of aqueous stable colloidal nano-C60 aggregates exposed to TX100 micelles under different environmental conditions

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Frontiers of Environmental Science & Engineering 2015年第2期9卷 197-205页

作者： Jing HUO Ye yu Ling GE bo zhang Yiliang HE School of Environmental Science & Engineering Shanghai Jiaotong University Shanghai 200240 China

C60, as one of carbon nanomaterials widely used in various fields, could be released into the water environment thus exerting some potential health risks to human beings. This work examined the behavior of aqueous stable colloidal nano-C60 （nC60） aggregates under different environmental conditions including Polyethylene glycol octylphenol ether （TX100） micelles concentration, pH, and reaction time when exposed to TX100micelles. Results show that the nC60 aggregates became more dispersive and restored the capability of generating the singlet oxygen when exposed to TX100 micelles. With the increase of TX100 concentration, smaller average size of nC60 aggregates was observed in dynamic light scattering （DLS） analysis, the fluorescence intensity of TX100 was more quenched by nC60 aggregates, and the kinetic rate constant of generating the singlet oxygen for nC60 aggregates was improved. The mean size of nC60 aggregates in the presence of TX 100 had no obvious variations when the pH ranged from 4 to 8. The longer reaction time between nCro aggregates and TX100 led to a higher kinetic rate constant of generating the singlet oxygen. Collective data suggest that variations in physicochemical properties of nC60 aggregates are strongly dependent on the surrounding media under different environmental conditions and directly govern nC60＇S transport behavior and potential toxicity.

关键词： Keywords nano-C60 (nC60) aggregates photochemicalreactivity artificial biological membrane

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Development of a machine learning-based model for predicting risk of early postoperative recurrence of hepatocellular carcinoma

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World Journal of Gastroenterology 2023年第43期29卷 5804-5817页

作者： yu-bo zhang Gang Yang Yang Bu Peng Lei Wei zhang Dan-Yang zhang Department of Hepatobiliary Surgery General Hospital of Ningxia Medical UniversityYinchuan 750003Ningxia Hui Autonomous RegionChina Department of Hepatobiliary Surgery People's Hospital of Ningxia Hui Autonomous RegionYinchuan 750003Ningxia Hui Autonomous RegionChina

BACKGROUND Surgical resection is the primary treatment for hepatocellular carcinoma(HCC).However,studies indicate that nearly 70%of patients experience HCC recurrence within five years following *** earlier the recurrence,the worse the *** studies on postoperative recurrence primarily rely on postoperative pathology and patient clinical data,which are ***,developing a new pre-operative prediction model for postoperative recurrence is crucial for guiding individualized treatment of HCC patients and enhancing their *** To identify key variables in pre-operative clinical and imaging data using machine learning algorithms to construct multiple risk prediction models for early postoperative recurrence of *** The demographic and clinical data of 371 HCC patients were collected for this retrospective *** data were randomly divided into training and test sets at a ratio of 8:*** training set was analyzed,and key feature variables with predictive value for early HCC recurrence were selected to construct six different machine learning prediction *** model was evaluated,and the bestperforming model was selected for interpreting the importance of each ***,an online calculator based on the model was generated for daily clinical *** Following machine learning analysis,eight key feature variables(age,intratumoral arteries,alpha-fetoprotein,preoperative blood glucose,number of tumors,glucose-to-lymphocyte ratio,liver cirrhosis,and pre-operative platelets)were selected to construct six different prediction *** XGboost model outperformed other models,with the area under the receiver operating characteristic curve in the training,validation,and test datasets being 0.993(95%confidence interval:0.982-1.000),0.734(0.601-0.867),and 0.706(0.585-0.827),*** curve and decision curve analysis indicated that the XGboost model also had good predictive performance and clin

关键词： Machine learning Hepatocellular carcinoma Early recurrence Risk prediction models Imaging features Clinical features

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Plasma spray coating on interconnector toward promoted solid oxide fuel cells and solid oxide electrolysis cells

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Frontiers in Energy 2024年第3期18卷 390-398页

作者： Junwen CAO yun ZHENG Wenqiang zhang bo yu Institute of Nuclear and New Energy Technology(INET) Collaborative Innovation Center of Advanced Nuclear Energy TechnologyTsinghua UniversityBeijing 100084China Department of Chemical Engineering University of WaterlooWaterlooOntario N2L 3G1Canada Institute of New Energy Materials and Engineering School of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China

Interconnector is a critical component to construct solid oxide cells (SOCs) stack. Oxidation of metallic interconnectors and Cr poisoning caused by oxidation are important factors that lead to long-term performance degradation of SOCs. Coating on the interconnector surface is an important approach to inhibit the oxidation and Cr migration of the interconnector. Herein, (La0.75Sr0.25)0.95MnO3–δ (LSM) and Mn1.5Co1.5O4 (MCO) are used to fabricate the coatings of interconnector. Two advanced thermal spray technology, atmospheric plasma spraying (APS) and low-pressure plasma spray (LPPS), are adopted for the coating preparation. The electrochemical performance, rising and cooling cycle stability, and Cr diffusion inhibition performance of the coatings are tested and evaluated. The result indicates that MCO can generate more uniform and denser coatings than LSM. In addition, MCO coatings prepared by LPPS shows the best electrochemical performance, rising and cooling cycle stability, and Cr diffusion inhibition. The initial area specific resistance (ASR) is 0.0027 Ω·cm2 at 800 °C. After 4 cooling cycle tests, the ASR increases to 0.0032 Ω·cm2 but lower than other samples. Meanwhile, the relative intense of Cr at the interface of SUS430 with MCO coatings fabricated by LPPS is lower than that of MCO fabricated by APS after 4 rising and cooling cycle operations, showing more favorable Cr diffusion inhibition performance.

关键词： interconnector coating plasma spray electrochemical performance Cr diffusion inhibition solid oxide cells(SOCs)

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Superconducting and structural properties of the phosphorus-rich Nb_(2)P_(5) superconductor under high pressure

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钨科技(英文) 2023年第3期5卷 364-369页

作者： Lei-Ming Chen Fang-Huang Wei Yan-Hong Chen Hang-Qi Liu Yang Xu bo-yu Chen Can-Li Dai yu-bo zhang Zhen-Hai yu School of Materials Science and Engineering Henan Key Laboratory of Aeronautic Materials and Application TechnologyZhengzhou University of AeronauticsZhengzhou 450046China Henan Key Laboratory of Aeronautical Material and Application Technology Zhengzhou University of AeronauticsZhengzhou 450046China Yongcheng City Vocational Education Center Shangqiu 476600China Kaixue Cold Chain Logistics Co. LtdZhengzhou 451450China Minjiang Collaborative Center for Theoretical Physics College of Physics and Electronic Information EngineeringMinjiang UniversityFuzhou 350108China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Nb_(2)P_(5) is a recently discovered Bardeen,Cooper,Schrieffer theory s-wave superconductor hosting nontrivial topological nodal-line structure,which could serve as an excellent platform for studying the interplay between the superconductivity and nontrivial topological *** report herein the superconducting and structural properties of Nb2P5studied by measuring the electrical resistivity and structure under high pressure up to ~28 GPa and performing first principles *** superconducting transition temperature TCdecreases with applied pressure,and reaches a minimum of 1.9 K at ~20.0 GPa,followed by a continuous enhancement up to 50.0 GPa without ***,at pressures above ~8.2 GPa,it is likely that a second superconducting transition appears and coexists with the initial one even up to~28 *** calculations rule out the correlation between the second superconducting-like transition and ***,the Nb2P5showed remarkable axial anisotropic compressibility,in which the b-axis is more compressible than the a-and *** variation of TCis discussed via considering the evolution of density of states around the Fermi level and the phonon spectrum.

关键词： Phosphorus-rich superconductor Superconducting transition temperature High-pressure measurement First principles calculations

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Commuting Hankel and Toeplitz Operators on the Hardy Space of the Bidisk

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Journal of Mathematical Research and Exposition 2010年第2期30卷 205-216页

作者： yu Feng LU bo zhang School of Mathematical Science Dalian University of Technology Liaoning 116024 P. R. China

In this paper, we characterize when the Toeplitz operator Tf and the Hankel operator Hg commute on the Hardy space of the bidisk. For certain types of bounded symbols f and g, we give a necessary and sufficient condit... 详细信息

关键词： Hankel operator Toeplitz operator Hardy space bidisk commuting.

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Special issue on electrochemical conversion and utilization of hydrogen energy

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Frontiers in Energy 2024年第3期18卷 263-264页

作者： yun ZHENG bo yu Xiaogang FU Jiujun zhang Institute of New Energy Materials and Engineering School of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China State Key Laboratory of Solidification Processing Atomic Control&Catalysis Engineering LaboratorySchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China

The concerns over energy crisis and climate change caused by the excessive consumption of fossil fuels and the associated emission of greenhouse gases, have driven many countries to develop policies for an energy transition into zero-carbon energy sources, essentially aiming at decarbonizing their energy systems. Among various renewable sources, hydrogen has been hailed as an ideal alternative to provide secure, cost-effective, and non-polluting energy. In recent years, there has been noteworthy progress in hydrogen electrochemical conversion and utilization techniques and devices, including water electrolyzers, proton-exchange membrane fuel cells (PEMFCs), solid oxide fuel cells (SOFCs), etc. Each of these technologies has yielded a series of encouraging advances. To showcase these recent advances, Frontiers in Energy is launching a special issue titled “electrochemical conversion and utilization of hydrogen energy”.

关键词： hydrogen energy. electrochemical

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