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Defect engineering of water-dispersible g-C_(3)N_(4) photocatalysts by chemical oxidative etching of bulk g-C_(3)N_(4) prepared in different calcination atmospheres

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Journal of Materials Science & Technology 2022年第8期103卷 232-243页

作者： thi Kim Anh nguyen thanh-Truc Pham Bolormaa Gendensuren Eun-Suok Oh Eun Woo Shin School of Chemical Engineering University of UlsanDaehakro 93Ulsan 44610South Korea Department of Material Technology Faculty of Applied ScienceHo Chi Minh City University of Technology and Education(HCMUTE)No.1 Vo Van Ngan StreetLinh Chieu WardThu Duc DistrictHo Chi Minh City 700000Viet Nam

In this study,water-dispersible graphitic carbon nitride(g-C_(3)N_(4))photocatalysts were successively prepared through the chemically oxidative etching of bulk g-C_(3)N_(4) that was polymerized thermally in different calcination atmospheres such as air,CO_(2),and N_(2).The different calcination atmospheres directly influenced the physicochemical and optical properties of both bulk and water-dispersible g-C_(3)N_(4),changing the photocatalytic degradation behavior of methylene blue(MB)and tetracycline hydrochloride(TCHCl)for water-dispersible g-C_(3)N_(4).The bubble-burst process in the thermal polymerization of thiourea produced defective edges containing C=O groups that preferred substituting the C-NHx groups over bulk g-C_(3)N_(4).In the oxygen-free N_(2) atmosphere among the different calcination atmospheres,more C=O functional groups were generated on the defective edges of bulk g-C_(3)N_(4),resulting in the highest N vacancy of the tri-s-triazine *** the successive chemical oxidation,S-or O-containing functional groups were introduced onto water-dispersible g-C_(3)N_(4).The water-dispersible g-C_(3)N_(4) photocatalyst from the oxygen-free N_(2) atmosphere(NTw)contained the most O-and S-functional groups on the g-C_(3)N_(4) ***,NTw exhibited the highest photocatalytic activity in the MB and TC-HCl photodegradation because of its slowest recombination process,which was ascribed to the unique surface properties of NTw such as abundant functional groups on the defective edges and N-deficient property.

关键词： g-C_(3)N_(4) Water-dispersible photocatalyst Calcination atmosphere Charge separation Chemically oxidative etching Defect edges

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Forecasting Damage Mechanics By Deep Learning

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Computers, Materials & Continua 2019年第9期61卷 951-977页

作者： Duyen Le Hien nguyen Dieu thi thanh Do Jaehong Lee Timon Rabczuk Hung nguyen-Xuan CIRTech Institute Ho Chi Minh City University of Technology(HUTECH)Ho Chi Minh CityVietnam Department of Architectural Engineering Sejong University209 Neungdong-roGwangjin-guSeoulKorea Institute of Structural Mechanics Bauhaus-Universität Weimar99423WeimarGermany Department of Physical Therapy Graduate Institute of Rehabilitation ScienceChina Medical UniversityTaichung40402Taiwan

We in this paper exploit time series algorithm based deep learning in forecasting damage mechanics *** methodologies that are able to work accurately for less computational and resolving attempts are a significant demand *** on learning an amount of information from given data,the long short-term memory(LSTM)method and multi-layer neural networks(MNN)method are applied to predict *** examples are implemented for predicting fracture growth rates of L-shape concrete specimen under load ratio,single-edge-notched beam forced by 4-point shear and hydraulic fracturing in permeable porous media problems such as storage-toughness fracture regime and fracture-height growth in Marcellus *** predicted results by deep learning algorithms are well-agreed with experimental data.

关键词： Damage mechanics time series forecasting deep learning long short-term memory multi-layer neural networks hydraulic fracturing

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Research on The Development Trend and Countermeasures of Vietnam-China Trade Deficit

Research on The Development Trend and Countermeasures of Vie...

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作者： nguyen thi thanh THU 合肥工业大学

学位级别：硕士

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Attribute Reduction on Decision Tables Based on Hausdorff Topology

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Computers, Materials & Continua 2024年第11期81卷 3097-3124页

作者： nguyen Long Giang Tran thanh Dai Le Hoang Son Tran thi Ngan nguyen Nhu Son Cu nguyen Giap Institute of Information Technology Vietnam Academy of Science and TechnologyHanoi10000Vietnam Faculty of Information Technology University of Economics-Technology for IndustriesHanoi10000Vietnam VNU Information Technology Institute Vietnam National UniversityHanoi10000Vietnam International School Vietnam National UniversityHanoi10000Vietnam Center of Science and Technology Research and Development Thuongmai UniversityHanoi10000Vietnam

Attribute reduction through the combined approach of Rough Sets(RS)and algebraic topology is an open research topic with significant potential for *** research works have introduced a strong relationship between RS and topology spaces for the attribute reduction ***,the mentioned recent methods followed a strategy to construct a new measure for attribute ***,the strategy for searching for the reduct is still to select each attribute and gradually add it to the ***,those methods tended to be inefficient for high-dimensional *** overcome these challenges,we use the separability property of Hausdorff topology to quickly identify distinguishable attributes,this approach significantly reduces the time for the attribute filtering stage of the *** addition,we propose the concept of Hausdorff topological homomorphism to construct candidate reducts,this method significantly reduces the number of candidate reducts for the wrapper stage of the *** are the two main stages that have the most effect on reducing computing time for the attribute reduction of the proposed algorithm,which we call the Cluster Filter Wrapper algorithm based on Hausdorff *** validation on the UCI Machine Learning Repository Data shows that the proposed method achieves efficiency in both the execution time and the size of the reduct.

关键词： Hausdorff topology rough sets topology from rough sets attribute reduction

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Marker-Assisted Selection of Xa21 Conferring Resistance to Bacterial Leaf Blight in indica Rice Cultivar LT2

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Rice science 2018年第1期25卷 52-56页

作者： Hue thi nguyen Quang Hong VU Tan Van MAI Thu thi nguyen Lam Duc VU Tung thanh nguyen Long Viet nguyen Hien Thu thi VU Hue thi NONG Trung nguyen DINH Nakano TOSHITSUGU Liet Van VU Crop Research and Development Institute Vietnam National University of Agriculture Trau Qui Gia Lam Hanoi 10000 Vietnam Faculty of Agronomy Vietnam National University of Agriculture Trau Qui Gia Lam Hanoi 10000 Vietnam Faculty of Biotechnology Vietnam National University of Agriculture Trau Qui Gia Lam Hanoi 10000 Vietnam Faculty of Land Management Vietnam National University of Agriculture Trau Qui Gia Lam Hanoi 10000 Vietnam Japan International Cooperation Agency 16 Phan Chu Trinh Hoan Kiem Hanoi 10000 Vietnam

Bacterial leaf blight of rice (BLB), caused by Xanthomonas oryzae pv. oryzae, is one of the most destructive diseases in Asian rice fields. A high-quality rice variety, LT2, was used as the recipient ***21, which carries the Xa21 gene, was used as the donor parent. The resistance gene Xa21 was introduced into LT2 by marker-assisted backcrossing. Three Xoo races were used to inoculate the improved lines following the clipping method. Eleven BC_3F_3 lines carrying Xa21 were obtained based on molecular markers and agronomic performance. The 11 lines were then inoculated with the three Xoo races. All the 11 improved lines showed better resistance to BLB than the recipient parent LT2. Based on the level of resistance to BLB and their agronomic performance, five lines (BC_3F_3 5.***.5.1, BC_3F_3 5.***.5.12, BC_3F_3 8.***.6.44, BC_3F_3 9.***.4.1 and BC_3F_3 9.***.4.23) were selected as the most promising for commercial release. These improved lines could contribute to rice production in terms of food security.

关键词： rice backcrossing bacterial leaf blight marker-assisted selection

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Combining SnO_(2-x)and g-C_(3)N_(4)nanosheets toward S-scheme heterojunction for high selectivity into green products of NO degradation reaction under visible light

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Journal of Materiomics 2022年第1期8卷 1-8页

作者： Pham Van Viet thanh-Dat nguyen Dai-Phat Bui Cao Minh thi Faculty of Materials Science and Technology University of ScienceVNU-HCM227 Nguyen Van Cu StreetDistrict 5Ho Chi Minh City700000Viet Nam Vietnam National University-Ho Chi Minh City Thu Duc DistrictHo Chi Minh City700000Viet Nam Ho Chi Minh City University of Technology(HUTECH) 475A Dien Bien Phu StreetBinh Thanh DistrictHo Chi Minh City700000Viet Nam

NOx emissions cause many negative impacts on the living *** photocatalysis of semiconductors is superior for nitric oxide(NO)degradation due to their low redox *** this report,we combine SnO_(2-x)/g-C_(3)N_(4)heterojunction photocatalyst toward the high selectivity into green products under visible light *** show that SnO_(2-x)/g-C_(3)N_(4)heterojunction degraded 40.8%of NO,which is 1.6 times higher than that of g-C_(3)N_(4).In addition,the selectivity coefficient of SnO_(2-x)/g-C_(3)N_(4)is higher 3 times than both pure SnO_(2-x)and g-C_(3)N_(4).Furthermore,SnO_(2-x)/g-C_(3)N_(4)expresses a superior stability for NO photocatalytic-degradation after five *** scavenger trapping test results,and electron spin resonance(ESR)analysis also provide more understanding of the charge transfer mechanism of ***_(2-x)/g-C_(3)N_(4)heterojunction shows a high removal efficiency of NO gas,making it an up-and-coming environmental treatment candidate.

关键词： G-C_(3)N_(4) NO removal Oxygen vacancies Photocatalysis S-scheme

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OSP-03大洋边缘和大洋岛屿沉积物块体运移及其影响：何时？何地？起因？（二）——墨西哥湾陆坡Ursa盆地斜坡失稳的触发因素

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海洋地质 2009年第1期25卷 57-57页

作者： Roger Urgeles Jacques Locat Peter B. Flemings Brandon Dugan nguyen thi thanh binh Derek E. Sawye 杨丽娟（译）闫章存（校对）巴塞罗纳大学西班牙拉瓦尔大学加拿大得克萨斯大学奥斯汀分校美国莱斯大学美国东京大学日本不详

Ursa盆地水深1000m，位于密西西比峡谷的东部隆起上，是研究大型无震滑坡现象的超级天然实验室。近期的研究表明，本地区有记载的地震活动有可能是由浅层重力滑动而不是深层构造作用导致的。在Ursa盆地，块体运移沉积物广泛存在，其时... 详细信息

Ursa盆地水深1000m，位于密西西比峡谷的东部隆起上，是研究大型无震滑坡现象的超级天然实验室。近期的研究表明，本地区有记载的地震活动有可能是由浅层重力滑动而不是深层构造作用导致的。在Ursa盆地，块体运移沉积物广泛存在，其时空关系在多波束以及地震反射资料中都有显示。2005年6月，综合大洋钻探项目（IODP）308航次在靠近全新世大滑坡以及泥火山型流体溢出构造附近钻了三个孔，钻穿了更新世-全新世一系列块体运移沉积物，采集了这几个钻孔的测井、沉积学以及土工资料，

关键词：沉积物大洋边缘运移块体触发因素斜坡失稳盆地墨西哥湾

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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(P<0.05).Conclusions:These results indicate that TAT2 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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Hyperstatic reaction method for calculations of tunnels with horseshoe-shaped cross-section under the impact of earthquakes

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Earthquake Engineering and Engineering Vibration 2020年第1期19卷 179-188页

作者： thanh nguyen Chi Gospodarikov Alexandr Saint Petersburg Mining University Saint PetersburgRussia Federation Hanoi University of Mining and Geology HanoiVietnam

Tunnels are now an integral part of the infrastructure in major cities around the world. For many reasons, these tunnels have horseshoe-shaped cross-sections with round top and flat bottom. this paper presents some improvements to the use of the Hyperstatic Reaction Method-HRM for analysing tunnels with horseshoe-shaped cross-sections when these tunnels operate under the influence of earthquakes, particularly in cases when the tunnel lining is a continuous lining. The analysis used parameters of a tunnel from the Hanoi metro system, as well as parameters of the strongest earthquake that may occur in the central Hanoi area in the improved HRM and 2 D numerical methods using the ABAQUS software. On the basis of the results obtained, the paper gives conclusions about the HRM methodology when it is used to calculate tunnels that have horseshoe cross-sections operating under the influence of earthquakes.

关键词： hyperstatic reaction method earthquake horseshoe cross-section impact tunnel

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Assessment of the physicochemical properties and biological activity of Vietnamese single-bulb black garlic

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Food Bioscience 2022年第5期49卷 436-445页

作者： Cao thi Hue Luc Quang Tan Hoang Van Hung Quynh thi Ngoc Le thanh Hoa nguyen nguyen thi Lan Huong nguyen Manh Ha Dinh Kha Trinh Department of Biotechnology Thuyloi University175 Tay SonDong DaHanoiViet Nam Thai nguyen University-Lao Cai Campus Group 13Binh Minh WardLao Cai CityLao Cai ProvinceViet Nam Hanoi University of Industry 298 Cau DienBac Tu LiemHanoiViet Nam

this study assessed the quality and biological activity of Vietnamese single-bulb black garlic(SBG)by investigating the effect of different temperatures(60,65,70,and 75℃)on physicochemical properties during the heat treatment *** optimal treating conditions accounted for the highest concentration of antioxidants were 70℃for 42 *** SBG.70 had a higher content of reducing sugar,protein,flavonoid,and polyphenol in comparison with the white garlic and the *** activity of single-bulb white garlic and SBG were measured via DPPH,phosphomolybdenum,and H2O2 radicals,as well as a reduction *** antimicrobial activity was assessed by the multi-concentration dilution method;the sample treated at 70℃displayed the strongest activity against four microbial strains with MIC values for ***,***,***,and *** of 64,128,128,and 64μg/mL,***,only two SBG samples aged at 70℃and 75℃were bacteriostatic to *** with MIC values of 32 and 64μg/mL,respectively.

关键词： Single-bulb black garlic Different temperature Physicochemical Antioxidant content Antioxidant activity Antimicrobial activity

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