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Influence of phytochemicals in piper betle linn leaf extract on wound healing

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Burns & Trauma 2015年第3期3卷 143-150页

作者： le thi lien Nguyen thi Tho Do Minh Ha Pham Luong Hang Phan Tuan Nghia Nguyen Dinh Thang Department of Biochemistry and Plant Physiology VNU University of ScienceVietnam National University334 Nguyen Trai St.Thanh Xuan DistrictHanoiVietnam Key laboratory of Enzyme and Protein Technology(KlePT) VNU University of ScienceVietnam National UniversityHanoiVietnam

Background:Wound healing has being extensively investigated over the *** impairment is caused by many reasons including increasing of free-radicals-mediated damage,delaying in granulation tissue formation,reducing in angiogenesis and decreasing in collagen *** facts consequently lead to chronic wound *** betle Linn(Betle)leaves have been folklore used as an ingredient of drugs for cutaneous wound ***,the effect of betle leaf on wound healing is not yet well *** this study,we aimed to investigate the healing efficacy of methanol leaf extract of Piper betle Linn on proliferation of fibroblast NIH3T3 cells as well as full-thickness burn and excision wounds in swiss ***:Scratch wound healing assays were conducted to examine the effects of betle leaf extract on healing activity of fibroblast *** and excision wounds on swiss mouse skins were created for investigating the wound healing progress caused by the betle leaf ***(MDA)was also evaluated to examine the products of lipid hydroperoxide(LPO)under conditions of with or without betle leaf extract ***:The results of this study showed that Piper betle Linn leaf extract in methanol increased proliferation of NIH3T3 cells and promoted wound healing in vitro and in vivo with both burn wound and excision wound *** addition,this extract significant decreased level of malondialdehyde(MDA)in liver of treated-mice compared with that in non-treated ***:Our results suggest that Piper betle Linn can be used as an ingredient in developing natural origin drugs for treatment of cutaneous wounds.

关键词： Piper betle Linn leaf extract Wound healing Malondialdehyde(MDA) Fibroblast(NIH3T3)

Characteristics of Corrosion Product Layer Formed on Weathering Steel Exposed to the Tropical Climate of Vietnam

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Materials Sciences and Applications 2013年第7期4卷 6-16页

作者： le thi Hong lien Hoang Lam Hong Institute of Materials Science Vietnam Academy of Science and Technology Hanoi Vietnam

The weathering steel (Corten B) was exposed to out-door atmosphere of Hanoi (urban site) and Donghoi (marine site). The results showed the protective ability of corrosion product layer formed on weathering steel in the initial stage. The SEM-EDX analysis detected the presence of chromium and copper in the inner layers of corrosion product formed on weathering steel. These elements improved corrosion resistance of corrosion product layers. In addition, the dense α-FeOOH phase were appeared early in corrosion product which is detected by X-ray diffraction and Micro Raman investigations. The results of polarization and EIS measurements also demonstrated the protectiveness of the corrosion product of weathering steel.

关键词： Weathering Steel Corrosion Product Layer Protectiveness Exposed to Inner Layer Outer Layer

汉语程度副词“极”、“挺”、“有点儿”与越南语相应程度副词语法特征对比研究

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汉语程度副词“极”、“挺”、“有点儿”与越南语相应程度副词语...

作者： le thi lien（黎氏莲）华中师范大学

学位级别：硕士

程度副词是汉语和越南语表达程度的重要手段。汉语的程度副词很丰富,越南语程度副词的数量远不及汉语中的数量。汉语和越南语的程度副词既有相同之处,又有不同之处,因此对两种语言的程度副词进行对比是有必要的。我们在绝对程度副词中... 详细信息

程度副词是汉语和越南语表达程度的重要手段。汉语的程度副词很丰富,越南语程度副词的数量远不及汉语中的数量。汉语和越南语的程度副词既有相同之处,又有不同之处,因此对两种语言的程度副词进行对比是有必要的。我们在绝对程度副词中选出“极”、“挺”、“有点儿”三个程度副词为例,与越南语相应的程度副词,分别为“cuc ki”、“rat”、“hoi”,进行对比。本文章从语法特征方面对“极”、“挺”、“有点儿”和越南语的“cuc ki”、“rat”、“hoi”进行对比。本文的主要内容包括:绪论部分,简介选题背景、研究意义、研究方法以及汉语的程度副词“极”、“挺”、“有点儿”和越南语的程度副词“cuc ki”、“rat”、“hoi”相关的研究成果。第一章至第三章针对“极”、“挺”、“有点儿”与“cuc ki”、“rat”、“hoi”的语法特征进行对比分析。本文章的语法特征具体为组合能力、造句能力及语法形态。第四章,从对比的结果入手,针对越南学生在学习“极”、“挺”、“有点儿”的过程当中出现的问题提出相应的教学建议。最后,总结本文的主要观点,并提出不足之处。通过本文研究我们得出结论:在组合能力上,汉语程度副词“极”、“挺”、“有点儿”与越南语程度副词“cuc ki”、“rat”、“hoi”组合能力都很强。在造句功能上,汉语程度副词“极”、“挺“有点儿”与越南语程度副词“cuc ki”、“rat”、“hoi”都能够在句子中充当状语成分;除了程度副词“hoi”可以用于“比”字句之外,汉语程度副词“极”、“挺”、“有点儿”与越南语程度副词“cuc ki”、“rat”都不能用于“比”字句。在语法形态上,重叠使用是越南语的程度副词“cuc ki”、“rat”、“hoi”的独特之处,汉语的程度副词“极”、“挺”、“有点儿”没有此特点。越南语的程度副词“cuc ki”、“rat”、“hoi”重叠式表示一定的语法意义。汉语的“极”、“挺”、“有点儿”和越南语相应程度副词主要的不同之处在于组合能力。越南学生学习“极”、“挺”、“有点儿”时存在的明显问题是用法掌握不全面,只运用一些基本的用法。本文章中提出越南学生学习汉语程度副词“极”、“挺”、“有点儿”要注意的一些语法特征以及进行“极”、“挺”、“有点儿”教学的一些教学建议,如要注重它们语法特征的教学,不忽略培养学生交际能力,并加强汉越对比。

关键词： “极” “挺” “有点儿” “cuc ki” “rat” “hoi” 对比

Forecasting measured responses of structures using temporal deep learning and dual attention

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Frontiers of Structural and Civil Engineering 2024年第6期18卷 832-850页

作者： Viet-Hung DANG Trong-Phu NGUYEN thi-lien PHAM Huan X.NGUYEN Department of Structural Mechanics Hanoi University of Civil EngineeringHanoi 11600Vietnam Faculty of Applied Science University of Economics-Technology for IndustriesHanoi 11600Vietnam London Digital Twin Research Centre Faculty of Science and TechnologyMiddlesex UniversityLondon NW44BTUK International School Vietnam National UniversityHanoi 11600Vietnam

The objective of this study is to develop a novel and efficient model for forecasting the nonlinear behavior of structures in response to time-varying random *** key idea is to design a deep learning architecture to leverage the relationships,between external excitations and structure's vibration signals,and between historical values and future values,within multiple time-series *** proposed method consists of two main steps:the first step applies a global attention mechanism to combine multiple-measured time series and time-varying excitation into a weighted time series before feeding it to a temporal architecture;the second step utilizes a self-attention mechanism followed by a fully connected layer to predict multi-step future *** viability of the proposed method is demonstrated via two case studies involving synthetic data from a three-dimensional(3D)reinforced concrete structure and experimental data from an 18-story steel ***,comparison and robustness studies are carried out,showing that the proposed method outperforms conventional methods and maintains high performance in the presence of noise with an amplitude of less than 10%.

关键词： structural dynamic time-varying excitation deep learning signal processing response forecasting

Tungsten-based nanocatalysts with different structures for visible light responsive photocatalytic degradation of bisphenol A

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Journal of Environmental Sciences 2024年第5期139卷 569-588页

作者： Hai Bang Truong thi Thu Loan Doan Nguyen Tien Hoang Nguyen Van Tam Minh Kim Nguyen le Gia Trung Jin Seog Gwag Nguyen Tien Tran Optical Materials Research Group Science and Technology Advanced InstituteVan Lang UniversityHo Chi Minh CityViet Nam Faculty of Applied Technology School of TechnologyVan Lang UniversityHo Chi Minh CityViet Nam The University of Da Nang University of Science and Technology54 Nguyen Luong BangDa NangViet Nam The University of Da Nang University of Science and Education459 Ton Duc Thang St.Lien ChieuDa Nang 550000Viet Nam Institute of Veterinary Science and Technology 31ha zoneTrau QuyGia LamHa Noi 12400Viet Nam Department of Physics Yeungnam UniversityGyeongsanGyeongbuk 38541Republic of Korea Center for Advanced Chemistry Institute of Research and DevelopmentDuy Tan University03 Quang TrungDa Nang 550000Viet Nam Faculty of Natural Sciences Duy Tan University03 Quang TrungDa Nang 550000Viet Nam

Environmental pollution,such as water contamination,is a critical issue that must be absolutely ***,three different morphologies of tungsten-based photocatalysts(WO_(3)nanorods,WO_(3)/WS_(2)nanobricks,WO_(3)/WS_(2)nanorods)are made using a simple hydrothermal method by changing the solvents(H_(2)O,DMF,aqueous HCl solution).The as-prepared nanocatalysts have excellent thermal stability,large porosity,and high *** results show all materials have good photocatalytic activity in aqueous media,with WO_(3)/WS_(2)nanorods(NRs)having the best activity in the photodegradation of bisphenol A(BPA)under visible-light *** may originate from increased migration of charge carriers and effective prevention of electron–hole recombination in WO_(3)/WS_(2)NRs,whereby this photocatalyst is able to generate more reactive·OH and·O_(2)^(–)species,leading to greater photocatalytic *** 99.6% of BPA is photodegraded within 60 min when using 1.5 g/L WO_(3)/WS_(2)NRs and 5.0 mg/L BPA at pH ***,the optimal conditions(pH,catalyst dosage,initial BPA concentration)for WO_(3)/WS_(2)NRs are also elaborately *** rod-like heterostructures are expressed as potential catalysts with excellent photostability,efficient reusability,and highly active effectivity in different types of *** particular,the removal efficiency of BPA by WO_(3)/WS_(2)NRs reduces by only 1.5% after five recycling runs and even reaches 89.1%in contaminated lake *** study provides promising insights for the nearly complete removal of BPA from wastewater or different water resources,which is advantageous to various applications in environmental remediation.

关键词： Photodegradation Bisphenol A Tungsten-based nanocatalyst Structure Nanorod

Synthesis and characterization of NaYF4:Yb3+,Er3+@silica-N=folic acid nanocomplex for bioimaginable detecting MCF-7 breast cancer cells

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Journal of Rare Earths 2019年第11期37卷 1183-1187页

作者： Ha thi Phuong Tran Thu Huong le thi Vinh Hoang thi Khuyen Do thi Thao Nguyen Thanh Huong Pham thi lien le Quoc Minh Institute of Materials Science Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Graduate University of Science and Technology-Vietnam Academy of Science and Technology 18 Hoang Quoc VietCau GiayHanoiViet Nam Department of Chemistry Hanoi Medical University1-Ton That TungDong DaHanoiViet Nam Department of Chemistry Hanoi University of Mining and Geology18-Pho LienBac Tu LiemHanoiViet Nam Institute of Biotechnology Vietnam Academy of Science and Technology18-Hoang Quoc VietCau GiayHanoiViet Nam Duy Tan University K7/25 Quang TrungDa NangViet Nam

Upconversion nanophosphors are new promising nanomaterials to be used as biolabels for detection and imaging of cancer *** nanophosphors absorb long-wavelength excitation radiation in the infrared or near infrared region and emit shorter wavelength,higher energy radiation from ultraviolet to *** this paper,we studied the hydrothermal method and optical properties of the functionalized NaYF4:Yb^3+,Er^3+for biomedical *** synthesis,these NaYF4:Yb^3+,Er^3+nanophosphors were functionalized with aminosilanes and folic *** acid binds to the folate receptor on the surface of MCF-7 breast cancer cells and this binding promotes internalization of the nanophosphors via *** sizes of the functionalized NaYF4:Yb^3+,Er^3+@silica-N=FA(folic acid)nanophosphors can be controlled with length of the rod about 300-800 nm and diameter of the rod about 100-200 *** structure of NaYF4:Yb^3+,Er^3+is in hexagonal crystal *** photo luminescence(PL)spectra of the functionalized NaYF4:Yb^3+,Er^3+@silica-N=FA nanophosphors were *** nanophosphors emit in red color with the strongest band at 650 nm under 980 nm *** result can provide NaYF4:Er^3+,Yb^3+@silica-N=FA complex for developing fluorescence label and image tool in cancer biology and medicine.

关键词： Upconversion luminescence NaYF4:Yb^3+,Er^3+ Nanophosphors Bioimaging Cancer cell Rare earths

Light-Controlled Chemical Reaction Pathways in Disulfide-Based Nonequilibrium Systems

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CCS Chemistry 2024年第6期6卷 1571-1580页

作者： Yingshuai Zhao Peng Zhao Jingyi Zhang Yuanfeng Zhao Bohan Li Guoxiu Hao Yuanyuan An Wei Zhou Yan Lu lien-Yang Chou Yijun Zheng School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210

Pathway selection in a complex chemical reaction network(CRN)enables organisms to adapt,evolve,and even learn in response to changing *** by this,herein we report an artificial system,where light signal was used to manipulate the reaction pathways in a disulfide-based nonequilibrium *** changing the photon energy and irradiation window,the anion or new radical-mediated pathways were selectively triggered,resulting in a user-defined evolution *** photodissipative cycles were achieved by UV(365 nm)irradiation,increasing the total number of reactions from 3 to *** emerging pathway selection of the CRN is accurately predictable and controllable even in complex organo-hydrogel *** demonstrate up to five-state autonomous sol-gel transitions and the formation of fuel-driven dissipative organo-hydrogel through both chemical and light *** work represents a new approach to allowing CRNs to communicate with the environment that can be used in the development of materials with lifelike behaviors.

关键词： chemical reaction networks light regulation kinetic control pathway selection disulfide

Luminescent and magnetic properties of multifunctional europium(Ⅲ) complex based nanocomposite

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Journal of Rare Earths 2019年第11期37卷 1237-1241页

作者： Hoang thi Khuyen Nguyen Thanh Huong Tran Thu Huong Pham thi lien Do thi Anh Thu Nguyen thi Anh Huong Wieslaw Strek le Quoc Minh Institute of Materials Science Vietnam Academy of Science and Technology18 Hoang Quoc VietCau CiayHanoiViet Nam Graduate University of Science and Technology Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Department of Chemistry University of Natural SciencesHanoi National University19 Le Thanh TongHoan KiemHanoiViet Nam Institute of Low Temperature and Structure Research PASOkolna 2Wroclaw 50-422Poland Duy Tan University K7/25 Quang TrungDa DangViet Nam

The luminescent rare earth(RE)complex based multifunctional nanocomposites offer new potential applications of multimodal imaging(magnetic resonance imaging(MRI),fluorescent bioimaging,etc.)that can be associated with therapeutic *** this study,we report some results obtained with novel multifunctional Fe3O4/Si-amine/Eu(NTA)3 nanocomposites that are composed of europium(Ⅲ)complex with 1-(2-naphthoyl)-3,3,3-trifluoroacetone ligands(NTA)(Eu(NTA)3)and superparamagnetic Fe3O4 *** nanocomposites were functionalized with an amine group for biomedicine *** multifunctional Fe3O4/Si-amine/Eu(NTA)3 nanocomposites exhibit both good magnetic behavior of Fe3O4 nanoparticles as a core and strong fluorescent property of europium(Ⅲ)*** characterizations were analyzed by XRD,SEM,EDX and FTIR *** optical properties were studied in detail by UV-VIS spectra and luminescent emission *** magnetic property was estimated by *** effect of concentrations of luminescent Eu(NTA)3 complex on luminescent and magnetic properties is discussed.

关键词： Multifunctional nanocomposite Luminescence Magnetic Europium(Ⅲ)complex Fe3O4 Rare earths

杜预对《春秋》政治合法性的重建——以《春秋左氏传序》为中心

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孔子研究 2024年第2期 37-48,156,157页

作者：张立恩西北师范大学马克思主义学院暨哲学学院兰州730000

在《春秋》诠释史上,回应《春秋》的政治合法性问题成为构建新《春秋》诠释体系的基本前提。汉代公羊家董仲舒、何休等提出的孔子素王、《春秋》为汉制法等观点建立起《春秋》的政治合法性。晋代杜预虽然与他们一样主张《春秋》为孔子... 详细信息

在《春秋》诠释史上,回应《春秋》的政治合法性问题成为构建新《春秋》诠释体系的基本前提。汉代公羊家董仲舒、何休等提出的孔子素王、《春秋》为汉制法等观点建立起《春秋》的政治合法性。晋代杜预虽然与他们一样主张《春秋》为孔子“制作之文”,但认为公羊家以上说法无异于以孔子为乱臣贼子,故杜预认为《春秋》非“天子之事”,而是史官之事,孔子“制作之本意”是要替代史官遵周公之志而修正鲁史。为证其说,杜预构设了《春秋》的三种存在形态:周德未衰时之《春秋》、周德已衰时之《春秋》及孔子之《春秋》。周德已衰时之《春秋》的出现构成孔子作《春秋》的必要条件。孔子之《春秋》与周德未衰时之《春秋》同遵周公之制,具有相同属性,因此,孔子之《春秋》在本质上是鲁史。杜预此举又出现两个问题:一是,据其将韩宣子所见鲁《春秋》视为“周之旧典礼经”,则周德未衰时之《春秋》与周德已衰时之《春秋》难以相容;二是,如其所述,史之策书皆君所命,因而孔子何以具有替代史官著史的政治合法性又成为其需要回答的一个问题。

关键词：《春秋》孔子杜预政治合法性