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Chalcogen heteroatoms doped nickel-nitrogen-carbon single-atom catalysts with asymmetric coordination for efficient electrochemical CO_(2) reduction

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Chinese Journal of Catalysis 2024年第9期64卷 54-65页

作者： Jialin Wang Kaini Zhang ta thi thuy ng Yiqing Wang Yuchuan Shi Daixing Wei Chung-Li Dong Shaohua Shen International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi'an Jiaotong UniversityXi'an 710049ShaanxiChina Department of Physics Tamkang UniversityNew Taipei City 25137TaiwanChina

The electronic configuration of central metal atoms in single-atom catalysts(SACs)is pivotal in electrochemical CO_(2) reduction reaction(eCO_(2)RR).Herein,chalcogen heteroatoms(e.g.,S,Se,and Te)were incorporated into the symmetric nickel-nitrogen-carbon(Ni-N_(4)-C)configuration to obtain Ni-X-N_(3)-C(X:S,Se,and Te)SACs with asymmetric coordination presented for central Ni *** these obtained Ni-X-N_(3)-C(X:S,Se,and Te)SACs,Ni-Se-N_(3)-C exhibited superior eCO_(2)RR activity,with CO selectivity reaching~98% at-0.70 V versus reversible hydrogen electrode(RHE).The Zn-CO_(2) battery integrated with Ni-Se-N_(3)-C as cathode and Zn foil as anode achieved a peak power density of 1.82 mW cm^(-2) and maintained remarkable rechargeable stability over 20 ***-situ spectral investigations and theoretical calculations demonstrated that the chalcogen heteroatoms doped into the Ni-N_(4)-C configuration would break coordination symmetry and trigger charge redistribution,and then regulate the intermediate behaviors and thermodynamic reaction pathways for eCO_(2)***,for Ni-Se-N_(3)-C,the introduced Se atoms could significantly raise the d-band center of central Ni atoms and thus remarkably lower the energy barrier for the rate-determining step of ^(*)COOH formation,contributing to the promising eCO_(2)RR performance for high selectivity CO production by competing with hydrogen evolution reaction.

关键词： Electrochemical CO_(2) reduction reaction Chalcogen heteroatoms Single-atom catalysts Asymmetric coordination CO production

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Polyacrylate modified Cu electrode for selective electrochemical CO_(2) reduction towards multicarbon products

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Science Bulletin 2024年第15期69卷 2395-2404页

作者： Yuchuan Shi Kaini Zhang Chung-Li Dong ta thi thuy nga Miao Wang Daixing Wei Jialin Wang Yiqing Wang Shaohua Shen International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi’an Jiaotong UniversityXi’an 710049China Department of Physics Tamkang UniversityNew Taipei City 25137China

Highly selective production of value-added multicarbon(C^(2+))products via electrochemical CO_(2) reduction reaction(eCO_(2)RR)on polycrystalline copper(Cu)remains ***,the facile surface modification using poly(α-ethyl cyanoacrylate)(PECA)is presented to greatly enhance the C^(2+)selectivity for eCO_(2)RR over polycrystalline Cu,with Faradaic efficiency(FE)towards C^(2+)products increased from30.1%for the Cu electrode to 72.6%for the obtained Cu-PECA electrode at-1.1 V *** hydrogen electrode(RHE).Given the well-determined FEs towards C^(2+)products,the partial current densities for C^(2+)production could be estimated to be-145.4 mA cm~(-2)for the Cu-PECA electrode at-0.9 V *** in a homemade flow ***-situ spectral characterizations and theoretical calculations reveal that PECA featured with electron-accepting-C≡N and-COOR groups decorated onto the Cu electrode could inhibit the adsorption of^(*)H intermediates and stabilize the^(*)CO intermediates,given the redistributed interfacial electron density and the raised energy level of d-band center(E_(d))of Cu active sites,thus facilitating the C-C coupling and then the C^(2+)selective *** study is believed to be guidable to the modification of electrocatalysts and electrodes with polymers to steer the surface adsorption behaviors of reaction intermediates to realize practical eCO_(2)RR towards value-added C^(2+)products with high activity and selectivity.

关键词： Electrochemical CO_(2)reduction Polymer modification Electron transfer C_(2+)products

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Compensation of Zn substitution and secondary phase controls effective mass and weighted mobility in In and Ga co-doped ZnO material

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Journal of Materiomics 2021年第4期7卷 742-755页

作者： Oanh Kieu Truong Le Anh Tuan Thanh Pham ngoc Kim Pham Trang Huyen Cao Pham Truong Huu nguyen Dung Van Hoang Hanh Kieu thi ta Dai Cao Truong Hoa thi Lai thuy Dieu thi Ung Vinh Cao Tran Thang Bach Phan aboratory of Advanced Materials University of ScienceHoChiMinh City700000Viet Nam Vietnam National University HoChiMinh City700000Viet Nam Faculty of Physics and Engineering Physics University of ScienceHoChiMinh City700000Viet Nam Faculty of Materials Science and Technology University of ScienceHoChiMinh City700000Viet Nam Center for Innovative Materials and Architectures(INOMAR) HoChiMinh CityViet Nam Institute of Materials Science Vietnam Academy of Science and TechnologyHanoi100000Viet Nam

Conductivity s and thermal conductivity k are directly related to carrier concentration while Seebeck coefficient S is inversely proportional to carrier ***,improving thermoelectric(TE)performance is ***,the first-time analysis of secondary phase-controlled TE performance in terms of density-of-state effective mass m*d,weighted mobility mw and quality factor B is discussed in ZnO *** results show that the secondary spinel phase Ga2O_(3)(ZnO)9 not only impacts on k but also on s and S at high temperature,while the effect of carrier concentration seem to be dominant at low *** the high-spinel-segregation sample,a compensation of dopant atoms from the spinel to substitutional sites in the ZnO matrix at high temperature leads to a low decreased rate of temperaturedependent m**** compensation process also induces a band sharpening,a small mw reduction,and a large B *** a result,In and Ga co-doped ZnO bulk with the highest spinel segregation achieves the greatest PF improvement by 112.8%,owing to enhanced Seebeck coefficient by 110%as compared to the good Zn-substitution sample.

关键词： Thermoelectrics In and Ga co-Doped ZnO Secondary phase Zn substitution DOS effective Mass Weighted mobility

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Exploring the Staging Patterns of MNC Entry to New Markets:The Resource Leverage Approach

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Journal of Business Administration Research 2021年第3期4卷 1-16页

作者： Tung-Shan Liao Thịngọc Duy Trần thi thuy Dung Pham College of Management Yuan Ze UniversityTaoyuan CityTaiwanChina Foreign Trade University Ho Chi Minh CityVietnam

this study aims at providing explanations for how MNCs(multinational companies)proceed with their manipulation of resources and competencies in the entry process to a foreign *** an increasing extent,such processes perform as a staging process of resource *** study identifies three stages,using the multiple case study incorporating grounded theory:the initial stage,the adaptive intensification stage,and the advantage persistence *** the initial stage,an MNC’s entry decision tends to be based on the resource replication mode of resource leverage;the resource exploitation mode of resource leverage is used mainly in the adaptive intensification stage,and the resource exploration mode is used in the advantage persistence *** study suggests that these resource leverage modes incorporating their microfoundations can be viewed as a set of potential measurements for examining MNCs'dynamic capabilities in the entry process to a new host market.

关键词： MNC entry Staging processes Dynamic capabilities view Resource leverage Grounded theory

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Nested multiplex PCR for identification and detection of human Plasmodium species including Plasmodium knowlesi

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Asian Pacific Journal of Tropical Medicine 2017年第3期10卷 280-284页

作者： Maria Miguel-Oteo Adela I Jiram thuy H ta-tang Marta Lanza Shamilah Hisam José Miguel Rubio Malaria & Emerging Parasitic Diseases Laboratory Parasitology DepartmentNational Microbiology Centre. Instituto de Salud Carlos Ⅲ Majadahonda Unit Institut Penyelidikan PerubatanInstitute for Medical Research

Objective:To develop a new technique for diagnosis of Plasmodium knowlesi and at the same time to be able to discriminate among the diverse species of Plasmodium causing human ***:In this study the nested multiplex malaria PCR was redesigned,targeting the 18S rR NA gene,to identify the fifth human Plasmodium species,Plasmodium knowlesi,together with the other human Plasmodium(Plasmodium falciparum,Plasmodium vivax,Plasmodium ovale and Plasmodium malariae)by amplified fragment size using only two amplification processes and including an internal reaction control to avoid false ***:The technique was validated with 91 clinical samples obtained from patients with malaria compatible *** technique showed high sensitivity(100%)and specificity(96%)when it was compared to the reference method employed for malaria diagnosis in the Instituto de Salud Carlos栿and a published real-time PCR malaria ***:The technique designed is an economical,sensitive and specific alternative to current diagnosis ***,the method might be tested in knowlesi-malaria endemic areas with a higher number of samples to confirm the quality of the method.

关键词： Malaria Plasmodium knowlesi Nested multiplex PCR Molecular diagnosis

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Emerging liver organoid platforms andtechnologies

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Cell Regeneration 2021年第1期10卷 280-298页

作者： Do thuy Uyen Ha Lam Yock Young Dan Yun-Shen Chan Huck-Hui ng Laboratory of precision disease therapeutics Genome Institute of Singapore60 Biopolis StreetSingapore 138672Singapore Department of Medicine Yong Loo Lin School of MedicineNational University of Singapore10 Medical DrSingapore 117597Singapore Division of Gastroenterology and Hepatology University Medicine ClusterNational University Hospital5 Lower Kent Ridge RoadSingapore 119074Singapore Bioland Laboratory(Guangzhou Regenerative Medicine and Health Guangdong Laboratory) Guangzhou 510005China Department of Biochemistry National University of SingaporeSingapore 117559Singapore NUS Graduate School for Integrative Sciences and Engineering National University of Singapore28 Medical DriveSingapore 117456Singapore Department of Biological Sciences National University of Singapore14 Science Drive 4Singapore 117597Singapore

Building human organs in a dish has been a long term goal of researchers in pursue of physiologically relevantmodels of human disease and for replacement of worn out and diseased organs. The liver has been an organ ofinterest for its central role in regulating body homeostasis as well as drug metabolism. An accurate liver replicashould contain the multiple cell types found in the organ and these cells should be spatially organized to resembletissue structures. More importantly, the in vitro model should recapitulate cellular and tissue level *** in cell culture techniques and bioengineering approaches have greatly accelerated the development ofadvance 3-dimensional (3D) cellular models commonly referred to as liver organoids. These 3D models describedrange from single to multiple cell type containing cultures with diverse applications from establishing patientspecificliver cells to modeling of chronic liver diseases and regenerative therapy. Each organoid platform isadvantageous for specific applications and presents its own limitations. this review aims to provide acomprehensive summary of major liver organoid platforms and technologies developed for diverse applications.

关键词： Liver Organoids Stem cells Disease models Regenerative therapy

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感恩与抑郁的关系 ——应对方式的并行中介作用

感恩与抑郁的关系 ——应对方式的并行中介作用

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作者：谢氏翠（thi thuy ta）南京大学

学位级别：硕士

本研究以特质感恩为大学生感恩水平的衡量标准,旨在通过对特质感恩、抑郁、应对方式三个变量的测量,来了解大学生感恩、抑郁与应对方式的现状及特点,重点研究感恩对抑郁的影响以及应对方式(积极应对和消极应对)的并行中介效应。选取了... 详细信息

本研究以特质感恩为大学生感恩水平的衡量标准,旨在通过对特质感恩、抑郁、应对方式三个变量的测量,来了解大学生感恩、抑郁与应对方式的现状及特点,重点研究感恩对抑郁的影响以及应对方式(积极应对和消极应对)的并行中介效应。选取了江苏省南京市某高校大一到大四学生为研究被试,共发放366份问卷,删除缺失率达5%以上的问卷后,获得362份有效问卷。问卷以大学生感恩特质量表、抑郁自评量表(SDS)、简单应对方式问卷(SCSQ)为测量工具。研究采用SPSS21.0进行相关分析、t检验和方差分析,用Mplus 7.0进行并行中介效应检验。本研究得出以下结论:(1)无抑郁大学生人数占70.7%,轻度抑郁人数占21.3%,中度抑郁人数占5.8%,重度抑郁人数占2.2%。总体而言,大学生抑郁的检出率为29.3%。(2)大学生抑郁不存在性别、专业性质、父母教育水平、是否独生子女的差异,但其在家庭所在地的差异显著。(3)大学生感恩水平的性别和专业性质差异显著,但其在家庭所在地、父母受教育程度、是否是独生子女四个人口统计学变量上差异不显著。其中,女生的感恩水平显著高于男生,文科生的感恩水平显著高于理工科生。(4)大学生积极应对的平均得分在所有人口学变量差异不显著。大学生消极应对的平均得分除性别显著外,其在专业性质、家庭所在地、父母受教育程度、是否独生子女均无显著差异。其中,女大学生的消极应对水平显著高于男大学生。(5)抑郁与感恩、积极应对两者的关系均呈显著负相关,与消极应对则呈显著正相关。(6)感恩与抑郁之间的直接效应显著,其直接效应量达77.6%。积极应对在感恩对抑郁的影响中的中介效应不显著,其效应量为15.9%。消极应对在感恩对抑郁的影响中的中介效应不显著,其效应量为6.3%。模型总中介效应显著,积极应对和消极应对的并行中介效应量为22.4%。研究结果表明,大学生的感恩水平能够直接负向影响大学生的抑郁水平。此外,感恩可以通过增加积极应对和减少消极应对来影响抑郁,积极应对与消极应对是感恩与抑郁关系的并行中介变量。

关键词：感恩抑郁大学生应对方式并行中介效应

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Nutritional status of Vietnamese infants assessed by Fenton growth chart and related factors:A cross-sectional study

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Pediatric Investigation 2023年第4期7卷 254-262页

作者： Lieu Thu thi nguyen Cuong Danh Tran Ha Thu thi nguyen Hai Thanh Phan Linh thuy nguyen Huong Lan thi nguyen Anh Hoai thi ta Chau Quynh thi Pho Khanh Nam Do Anh Kim Dang Huong thi Le School of Preventive Medicine and Public Health Hanoi Medical UniversityHanoiVietnam Department of Nutrition National Hospital of Obstetrics and GynecologyHanoiVietnam Department of General Obstetrics National Hospital of Obstetrics and GynecologyHanoiVietnam Department of Nutrition and Dietetics Hanoi Medical University HospitalHanoiVietnam Queensland Alliance for Environmental Health Sciences(QAEHS) The University of QueenslandBrisbaneAustralia

Importance:Nutritional status of infants,measured by birth weight and length,is an essential factor in neonatal *** in newborns may lead to a higher risk of mortality,neurological and cognitive impairment,and poor language ***:this study aims to assess the nutritional status of infants and related factors regarding maternal anthropometric characteristics and medical ***:A cross-sectional study was conducted at the National Hospital of Obstetrics and Gynecology,Vietnam from May 2021 to May 2022 on 340 infants and *** birth weight was defined following the Intergrowth-21 *** was evaluated using the Fenton growth chart when the length was below the 10%percentile line of the gestational *** regression models were applied to identify factors associated with the nutritional status of ***:We found that 12.4%and 14.1%of infants in our study fell into stunted and underweight categories,*** of mothers over 35 years old,having a height lower than 150 cm or experiencing anemia during pregnancy were more likely to be stunted or have low birth *** albumin deficiency during pregnancy was strongly associated with the infant being underweight(odds ratio[OR]=2.8,95%confidence interval[95%CI]1.1–7.3).Newborns were more likely to be stunted if their mothers had a history of preterm birth(OR=3.3,95%CI 1.1–10.2).Interpretation:Maternal nutritional status is closely related to infant malnutrition,particularly in preterm *** the understanding of mothers regarding prenatal care,reproductive healthcare,adequate nutritional diet,and multi-micronutrient supplements during pregnancy is therefore important.

关键词： Fenton chart Infant Low birth weight Stunting Underweight

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偏远地区风电场并网系统串联谐振分析

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电力系统自动化 2016年第15期40卷 120-125页

作者：唐振东杨洪耕四川大学电气信息学院四川省成都市610065

针对偏远风电场并网时易被忽略的并网系统串联谐振问题,提出结合回路元件灵敏度的串联谐振模态分析法进行研究。虽然并联谐振在电力系统中所占比例较大,但串联谐振的危害亦不可忽略。偏远风电场因其送出线较长,并网结构薄弱,输电线路分... 详细信息

针对偏远风电场并网时易被忽略的并网系统串联谐振问题,提出结合回路元件灵敏度的串联谐振模态分析法进行研究。虽然并联谐振在电力系统中所占比例较大,但串联谐振的危害亦不可忽略。偏远风电场因其送出线较长,并网结构薄弱,输电线路分布电容所带来的影响不容忽视。建立线路分布参数模型,并分析其阻抗特性,基于已建立的风电场并网模型,采用串联谐振模态分析法分析系统串联谐振现象,准确判断串联谐振频率的同时,给出串联回路电气元件的模态灵敏度值。最后,以某风电场为实例建立仿真模型,仿真结果验证了所采用分析方法的可行性。通过元件灵敏度值的计算,进一步阐述线路长度的改变对风电场并网系统串联谐振频率和幅值的影响规律,为风电场实际规划建设提供理论指导。

关键词：串联谐振偏远风电场并网逆变器模态分析元件灵敏度

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变分模态分解方法及其在滚动轴承早期故障诊断中的应用

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振动工程学报 2016年第4期29卷 638-648页

作者：唐贵基王晓龙华北电力大学能源动力与机械工程学院河北保定071003

介绍了一种自适应信号分解新方法——变分模态分解(Variational mode decomposition,VMD),并且针对滚动轴承早期故障识别困难这一问题,提出了基于VMD的诊断方法。首先通过基于分数高斯噪声的数值模拟试验对VMD方法的等效滤波特性进行研... 详细信息

介绍了一种自适应信号分解新方法——变分模态分解(Variational mode decomposition,VMD),并且针对滚动轴承早期故障识别困难这一问题,提出了基于VMD的诊断方法。首先通过基于分数高斯噪声的数值模拟试验对VMD方法的等效滤波特性进行研究,验证了其类似于小波包分析的频域剖分特性,继而分析了惩罚因子及分量个数的设置对VMD方法滤波特性的影响。为了在轴承故障检测过程中,减少人为主观选择影响参数存在的弊端,提出了基于包络谱特征因子(Feature factor of envelope spectrum,EFF)的影响参数自动搜寻策略,最后通过仿真信号及试验信号对所述方法进行验证。分析结果表明:该方法能够有效提取轴承早期故障信号中的微弱特征信息,实现故障类型的准确判别。

关键词：故障诊断滚动轴承早期故障变分模态分解等效滤波特性

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