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American Journal of Analytical Chemistry 2015年第5期6卷 457-467页

作者： Huy Du Nguyen T. Thuy Luyen Nguyen Khac Manh Nguyen T. anh Tuyet Tran anh mai Nguyen Quoc Hien Nguyen Central Laboratory for Analysis University of Science Vietnam National University in Ho Chi Minh City Ho Chi Minh City Vietnam Research and Development Center for Radiation Technology Vietnam Atomic Energy Institute Ho Chi Minh City Vietnam

The nano-gold layer formed on the platinum rotating disk electrode (nano-Au/Pt-RD) inherited the catalytic property for Cr(VI) reduction from platinum surface and owned the good features of nano-gold such as insensitivity with hydrogen ion, high surface area, augmenting diffusion of Cr(VI) and ability for self-assembling with 4-pyridine-ethanethiol (PET) through Au←S linkages, to form PET/nano-Au/Pt-RD electrode capable of accumulating Cr(VI) from sample. The obtained PET/ nano-Au/Pt-RD electrode showed an extreme sensitivity to Cr(VI). By using this electrode, 1.09 ng·L﹣1 was the detection limit of differential pulse adsorptive cathodic stripping voltammetry for Cr(VI) with the accumulation time of only 2 min. Moreover, this electrode was reproducible with 3.5% RSD for 30 times of Cr(VI) accumulating and stripping. In addition, this electrode was also selective for Cr(VI) determination, which was not almost interfered by other inorganic ions.

关键词： Nano-Gold Layer Platinum Electrode Stripping Voltammetry

Finite Element Modeling in Analyzing Physical Properties of the Pb-Free Piezoelectric Materials

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材料科学与工程（中英文A版） 2013年第4期3卷 282-288页

作者： Vo Thanh Tung Nguyen Trong Tinh Nguyen Hoang Yen Le Thi Ngoc Bao Dang anh tuan Hue University of Science Hue University Hue City 08454 Vietnam Institute of Applied Physics and Scientific Instrument of Vietnamese Academy of Science and Technology 08404 Vietnam

Factors Affecting the Entrepreneurial Intention of Students at Tan Trao University

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Macro Management & Public Policies 2023年第2期5卷 34-44页

作者： Hoang anh Dao Chu Thanh mai Phi Tra My Phan Huyen Linh Le Hai Yen Faculty of Economics and Business Administration Tan Trao UniversityYenson DistrictTuyen Quang Province300000Vietnam

Entrepreneurship is one of the popular choices for students after graduation from higher *** study focuses on proposing a model to identify the factors affecting the entrepreneurial intention of students at Tan Trao University by researching some typical models in the *** quantitative research methods based on a survey of 391 students,the study has shown that there are 5 factors affecting the entrepreneurial intention of students at Tan Trao University,including opportunity,motivation,perception of behavioral control,skills and resources for ***,the study proposes a number of solutions for the students,the university and other related parties to promote students’entrepreneurial intentions.

关键词： Factors Entrepreneurial intention Students Tan Trao University

我国南方水稻黑条矮缩病流行动态及预测预报实践

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中国植保导刊 2016年第1期36卷 20-26页

作者：刘万才陆明红黄冲周国辉 Hoang anh tuan 全国农业技术推广服务中心北京100125 华南农业大学广州510500 越南农业农村发展部植物保护局越南河内115302

自2009年南方水稻黑条矮缩病在中国南方稻区局部首次暴发为害以来,在农业部的高度重视和支持下,全国农业技术推广服务中心组织全国植保体系系统开展病害的流行规律、调查监测和预测预报技术研究,初步掌握了病害的发生流行动态和特点,明... 详细信息

自2009年南方水稻黑条矮缩病在中国南方稻区局部首次暴发为害以来,在农业部的高度重视和支持下,全国农业技术推广服务中心组织全国植保体系系统开展病害的流行规律、调查监测和预测预报技术研究,初步掌握了病害的发生流行动态和特点,明确了影响我国南方稻区病害发生的毒源地主要为中南半岛的越南中北部及红河平原,其次为我国的海南和云南南部山区。2010年以来,制定了病害测报技术规范,建立了监测预警网络体系,积极开展预测预报工作。南方水稻黑条矮缩病的监测预报经历了由"恐慌"到"淡定"、由"心中无数"到"心中有数"、由"无所适从"到"有条不紊"的过程,病害预测的准确性明显提高,在有效指导防治、控制病害流行、减轻危害损失方面发挥了重要作用。

关键词：南方水稻黑条矮缩病发生动态流行因素预测预报

Structural, Optical and Photocatalytic Properties of Cu²⁺ Doped ZnO Nanorods with Using HMTA Solvent Prepared by Hydrothermal Method

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Journal of Materials Science and Chemical Engineering 2023年第7期11卷 20-30页

作者： Nguyen Thi Tuyet mai Nguyen Thi Lan Trinh Xuan anh Ta Ngoc Dung Huynh Dang Chinh School of Chemical Engineering Hanoi University of Science and Technology Hanoi Vietnam

In this experiment, Cu2+ doped ZnO (Cu-ZnO) nanorods materials have been fabricated by hydrothermal method. Cu2+ ions were doped into ZnO with ratios of 2, 5 and 7 mol.% (compared to the mole’s number of Zn2+). The hexamethylenetetramine (HMTA) solvent used for the fabrication of Cu-ZnO nanorods with the mole ratio of Zn2+:HMTA = 1:4. The characteristics of the materials were analyzed by techniques, such as XRD, Raman shift, SEM and UV-vis diffuse reflectance spectra (DRS). The photocatalytic properties of the materials were investigated by the decomposition of the methylene blue (MB) dye solution under ultraviolet light. The results show that the size of Cu-ZnO nanorods was reduced when the Cu2+ doping ratio increased from 2 mol.% to 7 mol.%. The decomposition efficiency of the MB dye solution reached 92% - 97%, corresponding to the Cu2+ doping ratio changed from 2 - 7 mol.% (after 40 minutes of ultraviolet irradiation). The highest efficiency for the decomposition of the MB solution was obtained at a Cu2+ doping ratio of 2 mol.%.

关键词： Cu2+ Doped ZnO Nanorods ZnO Nanomaterials Hexamethylenetetramine (HMTA) Photocatalytics Methylene Blue Hydrothermal Method UV Irradiation

Improving Indigenous Technologies for Sustainable Land Use in Northern Mountainous Areas of Vietnam

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Journal of Mountain Science 2004年第3期1卷 270-275页

作者： Le Quoc Doanh Ha Dinh tuan Vietnam Agricultural Science Institute (VASI) D7 Phoung Mai Dong Da Hanoi VietnamVietnam Agricultural Science Institute (VASI) D7 Phoung Mai Dong Da Hanoi Vietnam

More than 30 ethnic groups are now living in northern mountainous regions, Vietnam, mainly relying on shifting cultivation with the fallow period being shortened from time to time. Naturally, soil fertility reduces from cycle to cycle, entailing the reduction of productivity. Large areas of moderately sloping lands suitable for upland agriculture have become bare after many cultivation-fallow cycles. The soils there have been severely degraded with more toxicity, low porosity, low water retention capacity and poor floral diversity. Normally, these lands cannot be used for food crop cultivation. So farmers in uplands have to rely on slash-and-burn practices for their livelihood. As there is no more forest with good soil in medium slopes, farmers go to cut forests in watershed, high slope lands and old forests up to the mountains’ top. There are ecologically and environmentally very sensitive areas, so their destruction will inevitably cause hazardous consequences in the whole basin. Meanwhile, cultivation in these areas has low economic efficiency and sustainability because the crop yield may decrease very fast due to severe erosion as the higher the slope, the more serious erosion. Consequently living standards of highland farmers remain low and unstable. Sustainable farming on these lands in the perspective of a seriously deteriorated ecology and environmental is not an easy task. There have been many projects trying to help mountainous farmers get out of their vicious circle. However, due to different reasons, the results gained are low, and in some cases, things ceased to move after the projects phased out. During past few years, based on the farmer experiences, the Vietnam Agricultural Science Institute has cooperated with local and international partners to implement different projects in order to solve the problems by developing simple, easy and cheap cultivation technologies, which can be accepted and applied by local poor farmers for sustainable agricultural

关键词： Indigenous technologies sustainable agriculture upland eco-regions northern vietnam

Material and Device Developments of p/n Ⅲ-Nitrde Thin Films made by Low-Temperature Sputtering

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Material and Device Developments of p/n Ⅲ-Nitrde Thin Films...

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

第二届海峡两岸功能材料科技与产业峰会（2015）

作者： Dong-Hau Kuo Thi Tran anh tuan Cheng-Che Li Wei-Chun Yen Department of Materials Science and Engineering "National Taiwan University of Science and Technology"

GaN and In GaN layers have been deposited by metal-organic vapor deposition(MOCVD)and molecular beam *** MOCVD,In GaN films grown at 550-900 oC use trimethylindium(TMIn),trimethylgallium(TMGa),and NH as reaction precursors and N as carrier *** high capital cost and process temperature and the utilization of dangerous precursors are the major concerns of MOCVD process.p-Ga N films grown at 1000

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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

The impact of heavy metals on bacterial tolerance of antibiotic resistance and growth in the aquatic environment of Vietnam

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Infectious Diseases Research 2022年第1期3卷 1-9页

作者： Diep The Tai mai Hoang Khanh Ngan Chau Kim Hung Nguyen Ngoc anh Thu Nguyen Thi Ngoc Nhi Laboratory of Bacteria Pasteur Institute of Ho Chi MinhDepartment of Immunology and MicrobiologyHo Chi Minh CityViet Nam

Heavy metals may induce bacterial antibiotic resistance and affect their growth in the *** this study,we aim to determine bacterial growth and antibiotic resistance in the pressure of heavy *** the changing morphology by gram staining was checked for bacterial toleration with heavy metal,developing of the colony form unit(CFU)was analysed bacterial kinetic growths and their biofilm *** disk diffusion test was used to perform bacterial susceptibility profiles with Ceftazidime(30μg),Ceftriaxone(30μg),Colistin sulfate(10μg),Meropenem or Imipenem(10μg),Ciprofloxacin(5μg)and Azithromycin(15μg)and the CLSI was applied for interpreting the *** bacterial morphology remarkably changed from normal to short,round shape at a high concentration of heavy metals after 1 *** changing shape adapted to heavy metals by survival growing and resisted to Azithromycin,Ciprofloxacin,and Colistin without biofilm formation after 1 month,that was continued increasing after 2 *** bacterial growth and antibiotic resistance were significant differences between provinces(P=0.01),type of bacterial species,and concentration of heavy *** results indicate that heavy metals are a crucial factor-driven for enhancing bacterial adaptation in pollution water resources and inducing their antimicrobial resistance in the aquatic environment.

关键词： antimicrobial resistance heavy metals aquatic environment bacterial growth Vietnam

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中越贸易对越南经济增长的影响研究

中越贸易对越南经济增长的影响研究

作者：丁氏梅英（DINH Thi-mai-anh）东南大学

学位级别：硕士

21世纪以来,经济全球化、区域化的趋势继续扩大影响到世界上所有的国家,促进了对外贸易的快速发展同时对国家经济的建设与发展做出巨大贡献。此外,这是客观的趋势,其在社会再生产过程中也占有非常重要的地位,来源于各国自然条件、科学... 详细信息

21世纪以来,经济全球化、区域化的趋势继续扩大影响到世界上所有的国家,促进了对外贸易的快速发展同时对国家经济的建设与发展做出巨大贡献。此外,这是客观的趋势,其在社会再生产过程中也占有非常重要的地位,来源于各国自然条件、科学技术发展水平等的差异。对外贸易是一国经济的重要组成部分,是推动一国经济增长必不可少的动力。中国目前是越南最大进出口贸易的对象国,中国-越南之间的贸易发展对越南国民经济增长有着重大意义。一方面,越南对中国的出口贸易有助于越南大力发展外向型经济战略,提升越南北部居民生活水平以及增加就业机会;另一方面,越南对中国进口贸易为越南及时补充暂时无法生产的产品,为其产量未能满足国内消费者的需求带来帮助,以便保持国民经济总量平衡、确保越南经济稳定与可持续发展、充分发挥本国经济优势和潜力的重要引擎。本文采用定量分析与定性分析来研究中越进出口贸易在多大的程度上带动越南经济增长,并且推出经济学的解释,阐明与提出这些问题的应对策略。本文共包括五个主要部分,第一章是导论选题背景及研究意义,提出了此论文的研究思路、内容、方法以及论文创新点及不足之处。第二章文献综述,首先介绍了对外贸易与经济增长的主要理论,其中包括对外贸易、经济增长、对外贸易与经济增长的关系以及国内外关于贸易发展对经济增长的影响研究进行文献综述。主要从经济增长的影响因素进行分析,同时贸易如何促进发展中国家经济增长,以及贸易与发展中国家的经济增长关系这三个角度整理归纳贸易对发展中国家经济增长影响的实证结论。第三章中越贸易发展的现状分析,对于越南改革开放之后至今的经济增长历程进行回顾,同时分析中越贸易发展的现状以及使用贸易依存度公式计算和RCA指数来进一步明确中越间贸易的特征,最后探讨了影响中越贸易的主要因素,指出双边贸易存在的问题。第四章中越贸易发展对越南GDP影响的实证分析,首先提出模型的基础假设,之后采用1995-2015年间中越进出口贸易额,越南固定资本,越南政府支出,越南国民消费以及越南GDP的数据做成样本,并结合运用计量方法建立模型,计量结果表明中越进出口贸易与越南经济增长具有显著相关性。第五章是结论、展望以及对中越贸易发展提出对策建议,具体来说,此部分主要从中越贸易的特点,针对中越贸易发展提出对策建议与未来研究的展望。

关键词：经济增长国际贸易向量自回归开放型经济