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

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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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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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

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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(PtaT2 possesses clear 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

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Application of Null Space Based Behavior Control to the Swarm Robot’s Control

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Modern Mechanical Engineering 2015年第3期5卷 97-104页

作者： Le thi thuy nga Le Hung Lan Department of Cybernetics University of Transport and Communications Hanoi Hanoi Vietnam

this paper proposes a solution to controls warm robots in an effort to avoid obstacles, moving to the goal by the method of Null Space based Behavior (NSB) control of an individual in the swarm. this paper also provides the stability analysis of the converging process by investigating the relationship between single agents, and the analysis result is proved by using the Lyapunov theory. Finally, the simulation results in two-dimensional space have confirmed the obtained theoretical results.

关键词： Swarm Robots Avoid Obstacles Null Space Based Behavior

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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域的研究

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...

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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

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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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Surveillance of dengue and chikungunya infection in Dong Thap,Vietnam:A 13-month study

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Asian Pacific Journal of Tropical Medicine 2016年第1期9卷 36-40页

作者： Pham thi Kim Lien Laurence Briant Truong Ba tang Bui Minh Trang Laurent Gavotte Emmanuel Comillot Vu Trong Duoc Tran Nhu Duong Roger Frutos Phan thi nga National Institute of Hygiene and Epidemiology University of Montpellier Department of Biology Dong Thap General Hospital Cirad TA-A17/GCampus International de Raillarguet

Objective:To establish a surveillance in Dong Thap,at the border with Cambodia by assessing the presence of DHNV serotypes and CHIKV among patients hospitalized at Dong Thap general ***:Cross-sectional descriptive analysis was conducted on a cohort of 131 patients hospitalized with acute fever and symptoms compatible with dengue or *** study was conducted from January 2012 to February *** full clinical picture was established as well as serological and molecular *** analysis was sequentially performed on blood samples collected on admission and an average of seven days after *** detection of IgM antibody to DENV was performed by IgM capture ELTSA and the detection of DENV and CHIKV RNA was done by reverse-transcription multiplex ***:101 patients out of 131(77%) were confirmed with *** four dengue serotypes were detected with a predominance of DENV2 and *** chikungunya infection was detected although reported in neighboring Cambodia.A differential efficiency of serological dengue detection was *** was 29%upon admission and 53%after seven days on the same patients.30 patients out of 131(23%) were negative with both DENV and ***:Dengue is at risk of being underestimated and chikungunya is not systematically *** in detection and surveillance procedures are therefore discussed to increase efficiency of dengue detection and continue the monitoring the emergence of CHIKV in Dong Thap province and in Vietnam.

关键词： Dengue Chikungunya Arbovirus Dong ThapVietnam

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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

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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

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