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In vivo anticancer activity of maesopsin 4—O— β—glucoside isolated from leaves of Artocarpus tonkinensis *** Gagnep

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Asian Pacific Journal of Tropical Medicine 2016年第4期9卷 343-348页

作者： Trinh thi thuy Dao Duc thien Tran Quang Hung Nguyen Thanh Tam Nguyen thi Hoang Anh Nguyen thi nga Nguyen thi Cuc le Phuong Mai Tran Van Sung Domenico V.Delfino Do thi Thao Institute of Chemistry.Vietnam Academy of Science and Technology Institute of Biotechnology Vietnam Academy of Science and Technology National Research Council Canada Measurement Science and Standards1200 Montreal RoadBuilding M-12.Ottatca.Ontario KIA OR6 Department of Medicine University of PerugiaPiazzale Gambuli.S.Andrea delle Fratte

Objective:To investigate the antitumor effect of maesopsin 4-O-β-glucoside(TAT2) isolated from the leaves of Artocarpus tonkinensis(***) *** ***:The antitumor activity of TAT2 was evaluated in lewis lung carcinoma(LLC) tumor-bearing ***/c mice had tumors induced by implantation with 2× 10~6 LLC cells into the subcutaneous right posterior ***-bearing mice were treated orally with a range of doses of TAT2 and a standard drug,*** were observed for tumor growth and mortality *** was collected to determine hematological and biochemical *** TAT2 was isolated from an ethanolic extract of *** *** structure was determined by MS and NMR spectroscopy,and identified as *** compound did not show acute toxicity at the highest dose tested(2 OIK) mg/kg body weight).TAT2 exhibited antitumor activity by decreasing tumor growth,increasing the survival rale,and ameliorating some hematological and biochemical parameters at doses of 100 and 200 mg/kg body weight(Plear antitumor *** to its bioavailability and low toxicity,and the fact that it could be isolated in a large scale from *** leaves,the compound shows promise as a potential anticancer drug.

关键词： Artocarpus tonkinensis BALB/c Hematological parameters lewis lung carcinoma Maesopsin 4-0-β-glucoside

Infectious keratitis in Vietnam:etiology,organisms,and management at Vietnam National Eye Hospital

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International Journal of Ophthalmology(English edition) 2022年第1期15卷 128-134页

作者： Pham Ngoc Dong Do thi thuy Hang Nguyen thi nga Duong Mai thi Lien Angela C.Chen Anthony J.Aldave Vietnam National Eye Hospital Hanoi 10000Vietnam Nam Dinh Eye Hospital Nam Dinh 420000Vietnam Stein Eye Institute UCLA David Geffen School of MedicineLos AngelesCA 90095USA

AIM:To report the etiologies,risk factors,treatments,and outcomes of infectious keratitis(IK)at a major Vietnamese eye ***:this is a retrospective review of all cases of IK at Vietnam National Eye Hospital(VNEH)in Hanoi,*** histories,demographics,clinical features,microbiological results,and treatment outcomes were ***:IK was diagnosed in 1974 eyes of 1952 patients,with ocular trauma being the greatest risk factor for IK(34.2%),frequently resulting from an agriculturerelated injur y(53.3%).The mean duration between symptom onset and presentation to VNEH was 19.3±14.4 d,and 98.7%of patients had been treated with topical antibiotic and/or antifungal agents prior to evaluation at *** on smear results of 1706 samples,the most common organisms identified were bacteria(n=1107,64.9%)and fungi(n=1092,64.0%),with identification of both bacteria and fungi in 614(36.0%)***-five of 374 bacterial cultures(14.7%)and 426 of 838 fungal cultures(50.8%)were positive,with the most commonly cultured pathogens being Pseudomonas aeruginosa,Streptococcus pneumonia,Fusarium spp.,and Aspergillus *** perforation and descemetocele developed in 391(19.8%)and 93(4.7%)eyes,*** treatment was successful in resolving IK in 50.4%eyes,while 337(17.1%)eyes underwent penetrating or anterior lamellar *** was performed in 7.1%of eyes,most commonly in the setting of fungal ***:Ocular trauma is a major risk factor for IK in Vietnam,which is diagnosed in almost 400 patients each year at *** this,and as approximately one quarter of the eyes that develop IK require corneal transplantation or evisceration,greater emphasis should be placed on the development of prevention and treatment programs for IK in Vietnam.

关键词： infectious keratitis bacterial keratitis fungal keratitis microsporidial keratitis Acanthamoeba keratitis herpes simplex virus keratitis Vietnam

外汇政策对国际直接投资在越南的影响——针对全部或者不同经济领域的研究

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外汇政策对国际直接投资在越南的影响——针对全部或者不同经济领...

作者： Do thi thuy nga（杜氏翠娥）上海财经大学

学位级别：硕士

关于汇率水平、汇率波动性、汇率制度与国际直接投资(FDI)之间的关系,已有许多研究,但关于外汇政策对FDI的影响研究不多,特别是在越南发展中国家经济的背景下。该研究通过考虑越南经济和全球经济背景下政府干预货币买卖和汇率等因素,揭... 详细信息

关于汇率水平、汇率波动性、汇率制度与国际直接投资(FDI)之间的关系,已有许多研究,但关于外汇政策对FDI的影响研究不多,特别是在越南发展中国家经济的背景下。该研究通过考虑越南经济和全球经济背景下政府干预货币买卖和汇率等因素,揭示了外汇政策对吸引国际直接投资到越南的影响。而且,每一阶段都是不同的,随着世界和越南经济的发展,汇率政策对FDI在越南的影响也会有所不同。本文运用自回归分布滞后模型(ARDL)分析了2001-2019年汇率政策对FDI在越南的影响。国内生产总值、贸易开放度、汇率和干预指数是本研究考虑的主要因素。实证分析结果表明,国内生产总值、贸易开放度与FDI流入呈正相关,而干预指数与FDI流入呈负相关。此外,汇率对FDI的影响随着时间的推移而变化,但从长期来看,汇率与FDI流入在统计上是负相关的。就18个经济部门的FDI而言,国内生产总值、贸易开放度、汇率和干预指数与各经济部门的关系不同。因此,这项研究有助于增加在小型开放和新兴经济体对FDI和汇率政策的现有文献,以帮助吸引外来的FDI。再者,这项研究对指出汇率政策如何影响FDI的实际意义做出了贡献,然后政策制定者在调整汇率政策以吸引FDI并发展越南经济时可以考虑这些方面。

关键词：汇率政策国际直接投资经济行业国内生产总值贸易开放度汇率干预指数

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

Photodegradation of Cinnamic Acid Solution in the Presence of Various Oxidizing Agents on TiO2 and Fe-TiO2 Catalysts

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材料科学与工程（中英文A版） 2016年第6期6卷 289-300页

作者： Ha Cam Anh Luu Cam Loc Nguyen Tri Nguyen Phung Anh Nguyen thi nga Tot Nguyen thi thuy Van Hoang Tien Cuong University of Technology Vietnam National University Ho Chi Minh City 268 Ly Thuong Kiet Str. Ho Chi Minh City 70100Vietnam Institute of Chemical Technology Vietnam Academy of Science and Technology 01 Mac Dinh Chi Str. Ho Chi Minh City 70100Vietnam

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

Phytochemical Constituents and Determination of Resveratrol from the Roots of <i>Arachis hypogea</i>L.

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American Journal of Plant Sciences 2013年第12期4卷 2351-2358页

作者： Tuyen Pham Nguyen Kim nga Vo thi Phuong Tran Van Phuong Quach Ngo Diem Duong Ngo thi thuy Quang Ton That Phung Nguyen Kim Phi Department of Chemical Technology Faculty of Chemical-Food Technology University of Technical Education Ho Chi Minh City Ho Chi Minh City Vietnam Department of Organic Chemistry Faculty of Chemistry University of Science Vietnam National University-Ho Chi Minh City Ho Chi Minh City Vietnam Department of Plant Biotech and Biotransformation Faculty of Biology University of Science Vietnam National University-Ho Chi Minh City Ho Chi Minh City Vietnam Faculty of Environmental Science Sai Gon University Ho Chi Minh City Vietnam

Two triterpenoid saponins, 6, 7, together with five known compounds were isolated from the roots of Arachis hypogea L. collected in Vietnam. Their structures were established by spectroscopic analysis (1D, 2D NMR and HRMS) as well as by comparison with those reported in the literature. Furthermore, the high content of resveratrol in the roots opens a new potential resource for pharmaceutical companies to prepare medicines from the wasted peanut roots.

关键词： Arachis hypogea L. Peanut Resveratrol Triterpenoid Glycoside

汉语“一点”、“一些，与越南语“m(?)t chút”、“m(?)t vài”对比研究及教学对策

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汉语“一点”、“一些，与越南语“m(?)t chút”、“m(?)t vài...

作者：陈氏翠娥（TRAN thi thuy nga）辽宁师范大学

学位级别：硕士

现代汉语里的量词和越南语里的量词有许多相似的地方,但是也有很多差异。中越两种语言在量词上的异同对于学习现代汉语的越南语学生来说很难掌握,所以他们在运用汉语量词的时候,犯点错误往往是常见也是难以避免的。越南学生学习汉语时,... 详细信息

现代汉语里的量词和越南语里的量词有许多相似的地方,但是也有很多差异。中越两种语言在量词上的异同对于学习现代汉语的越南语学生来说很难掌握,所以他们在运用汉语量词的时候,犯点错误往往是常见也是难以避免的。越南学生学习汉语时,比较常见的量词有“点”、“些”等。使用“点”、“些”时最常见的固定搭配是”一点”、“一些”,越南语中也有相对应的“motchut”,“mot vai”。“一点”、“一些”和“mot chut”、“mot vai”之间存在着差异,这为越南学生学习和掌握”一点”、“一些”带来了麻烦。本文将对现代汉语“一点”、“一些”与越南语“mot chut”、“mot vai”进行对比研究,利用研究结果分析和归纳越南学生习得”一点”、“一些”时的偏误,并做一些教学对策上的摸索。本文的主要内容如下:绪论部分主要提到汉语及越南语量词的一些基本概念、研究现状,并简述本文的选题原因、研究意义、研究内容及方法、思路等。第一部分对“一点”和“mot chut”,“mot vai”进行了对比研究。首先笔者介绍汉语“一点”、“一些”与越南语的“mot chut”、“mot vai”,让读者把握他们的基本特征。在越南语有大概四个词语搭配跟“一点”、“一些”有相似的意思,但是最接近的就是“mot chut”,“mot vai”,汉语中的“一点”相当于越南语中的“mot chut”,“一些”相当于“mot vai”.其次笔者进行侧重探讨“一点”和“mot chut”,“一些”与“mot vai”的相同点与不同点。通过列表对比方式,来比较分析汉语量词“一点”、“一些”与对应的越南语量词“mot chut”、“mot vai”在使用方法、功能方面的区别。重点研究了包括其使用的重叠和省略形式、与表达动词行为的词语组合的形式上的异同,以及在句法功能方面,二者充当主谓宾定状补等成分上的异同。第二部分讲述了越南学生运用现代汉语量词”一点”、“一些”时候的偏误。本次问卷调查对象是越南河内东方大学汉语教师与翻译专业一年级,二年级的学生。本论文采用问卷调查方式,对数据进行统计、归纳、分析。针对越南学生在学习汉语量词”一点”、“一些”时常见的偏误问题,结合对比研究进行剖析,并总结出出现偏误的原因。第三部分是通过调查数据,分析偏误原因与类型,在此基础上提出切实可行的解决方案,为越南学生掌握汉语不定量词“一点”、“一些”提出相应的教学对策。点本文的创新点是:本文对于汉语不定量词“一点”、“一些”与越南语“mot chut”、“mot vai”进行了对比研究。目前,无论是中国还是越南对于这四个不定量词的研究都很少,笔者通过研究与分析问卷结果提出了一些有效的教学策略,弥补了这方面的一些缺憾。本文的不足之外:针对“mot chut”、“mot vai”的研究材料很少,虽然有一些越南学者出版的越南语语法书提到“mot chut”、“mot vai”可是不够全面所以参考材料并不充分。问卷研究范围也不够大,只调查了东方法学汉语系的一年级与二年级学生。

关键词：汉语越南语量词 ”一点”、“一些” “m(?)t chút"、“m(?)t vài”

个人文化因素对越南消费者新产品接受行为影响研究

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个人文化因素对越南消费者新产品接受行为影响研究

作者：阮氏翠娥（NGUYEN thi thuy nga）湖南大学

学位级别：硕士

随着生活水平的提高,消费者需求日益多元化,购买潜力日益增大。在日常购物活动中,消费者购买行为越来越不具有计划性和理智性,而消费者接受行为现象变得越来越普遍。近几年来,关于消费者的新产品接受行为的研究成果较为丰富,但大部分研... 详细信息

随着生活水平的提高,消费者需求日益多元化,购买潜力日益增大。在日常购物活动中,消费者购买行为越来越不具有计划性和理智性,而消费者接受行为现象变得越来越普遍。近几年来,关于消费者的新产品接受行为的研究成果较为丰富,但大部分研究以消费者购买行为反应机制为研究重点。此外,研究主要是针对发达国家消费者接受行为的研究。越南作为一个拥有9559万人口,城市人口达3328万,占总人口的34.70%,具有庞大购买潜力的市场,但关于越南消费者接受行为的研究几乎一片空白。本文分析了个人文化因素对越南消费者新电子产品接受行为的影响。以个人电子产品为例,填补了这方面研究的空白。论文主要内容包括在对以往研究归纳和总结的基础上,探讨了个人文化因素对越南消费者新电子产品接受行为的影响,并进行建构了模型与四个自变量是个性,集体性,风险回避,创新性。控制变量包活年龄,教育水平,收入来调整新电子产品接受行为。然后,通过问卷调查方法进行数据的收集,并借助SPSS18.0数据分析软件,而运用了描述性统计分析、多元回归分析等统计分析方法对数据进行分析。研究结果表明:(1)在研究中使用的四个文化因素只有三个人文化因素(个人,风险回避和创新性)对消费者的新产品接受行为具有影响。集体性与消费者购买新电子产品的频率没有统计学显著的关系,没有足够的证据支持假设。(2)个性对新电子产品的购买频率有正面的影响。(3)风险回避对新电子产品的购买频率有负面的影响。(4)创新性对新电子产品的购买频率有正面的影响。研究展望考虑某些文化因素通过哪些因素对新电子产品接受行为产生间接影响,如消费者对电子产品的兴趣,消费者的态度或其他因素。有必要关注其他自变量的影响程度,如营销组合,地区特征等。

关键词：接受行为越南消费者个人文化因素购买意图购买频率