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Preserving mandarin quality during ambient storage using edible coatings of pregelatinized corn starch Pickering emulsions and essential oil

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FOOD BIOSCIENCE 2023年第3期53卷 1920-1930页

作者： Wigati, Laras Putri Wardana, Ata Aditya Jothi, Jakia Sultana Leonard, Sergio van, tran thi Yan, Xirui Tanaka, Fumina Tanaka, Fumihiko Kyushu Univ Grad Sch Bioresource & Bioenvironm Sci 744 MotookaNishi Ku Fukuoka Fukuoka 8190395 Japan Bina Nusantara Univ Fac Engn Dept Food Technol Jakarta 11480 Indonesia Kyushu Univ Fac Agr 744 MotookaNishi Ku Fukuoka Fukuoka 8190395 Japan Chattogram Vet & Anim Sci Univ Dept Food Proc & Engn Chattogram 4225 Bangladesh Kyushu Univ Sch Agr 744 MotookaNishi Ku Fukuoka Fukuoka 8190395 Japan Vietnam Inst Agr Engn & Postharvest Technol Dept Res Preservat Technol Agr Prod Hanoi 10000 Vietnam

Fruit stored in poor conditions undergo biochemical degradations that impact fruit physical qualities, such color and firmness, and reduce beneficial nutritional content including vitamins, flavonoids, phenols, and antioxi-dants. this study investigated the impact of a postharvest treatment of mandarins with edible coatings to prevent biochemical degradations and minimize color changes. The edible coating evaluated in this study is a composite of pregelatinized corn starch (PS), with a cellulose nano fiber (CF) Pickering emulsifier, and is enriched with basil essential oil (EO). The results of varying each parameter were then analyzed by the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) method to identify the best-performing edible coating. Using this method, the leading edible coating was identified as PS5EO3 formulized from 5% pregelatinized corn starch, 3% basil essential oil and 0.5% cellulose nanofiber, with a ranking of 0.721 based on quality content, and 0.676 based on percentage change in nutrients after the 12 days of storage at 25 degrees C. Mandarins coated with PS5EO3 significantly suppressed quality losses, and achieving the lowest losses of citric acid (10.45%), while maintaining color stability in terms of color density (14.97%) and percent polymer color (78.14%).

关键词： Biochemicals Color stability Edible coating Mandarin orange Storage

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Two-dimensional perovskite SrNbO_(2) N with Zr doping for accelerating photoelectrochemical water splitting

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Journal of Materials Science & Technology 2023年第11期142卷 176-184页

作者： Thanh Tam thi tran van-Huy Trinh Jeongsuk Seo Department of Chemistry College of Natural SciencesChonnam National University77 Yongbong-roBuk-guGwangju 61186South Korea

The superior ability of perovskite-type SrNbO_(2) N to absorb intensive visible light makes it a potential semiconductor to produce hydrogen and oxygen by photoelectrochemical(PEC)water splitting under *** surface morphologies,such as shape and structure,of the oxynitride strongly affect its photoactivity,although the mechanism has been hardly ***,we report a two-dimensional(2D)porous SrNbO_(2) N plate with Zr doping,nitrided from layered perovskite Sr_(5)Nb_(4)O_(15) and also its largely enhanced PEC water splitting ***^(4+)was doped in Sr_(5)Nb_(4)O_(15) during flux-assisted calcination using KCl,producing 2D-type truncated-octahedral Sr_(5)Nb_(4)O_(15):Zr plates approximately 50 nm in *** nitridation completely transformed Sr_(5)Nb_(4)O_(15):Zr to 2D single-crystalline SrNbO_(2) N:Zr with a large surface area,which was subsequently used to fabricate a thin and uniform photoanode by the spin coating *** a result,the Co(OH)_(x)/SrNbO_(2) N:Zr/FTO photoanode capable of absorbing visible light of up to 680 nm exhibited an activity of 2.0 mA cm^(-2) at 1.23 V vs the reversible hydrogen electrode for water splitting under AM 1.5G simulated *** improvement in photoactivity mainly originated from the 2D surface morphology of SrNbO_(2) N:Zr,which is clearly distinguishable from 3D-type *** to electrochemical analyses,the 2D structure of SrNbO_(2) N:Zr boosted the separation and accelerated the transfer of charges photogenerated during the water splitting,thus driving the reaction ***,the result empirically demonstrates that controlling the surface morphology of SrNbO_(2) N is an effective strategy to suppress the recombination of charges and minimize their diffusion pathway,eventually enhancing the PEC activity.

关键词： Solar water splitting Water oxidation BaNbO_(2)N Doping engineering Flux-assisted calcination Spin coating

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Static and dynamic analysis of functionally graded fluidinfiltrated porous skew and elliptical nanoplates using an isogeometric approach

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Frontiers of Structural and Civil Engineering 2023年第3期17卷 477-502页

作者： tran thi Thu THUY Faculty of Mechanical Engineering Hanoi University of IndustryHanoi 100000Vietnam

The analysis of static bending and free and forced vibration responses of functionally graded fluidinfiltrated porous(FGFP)skew and elliptical nanoplates placed on Pasternak’s two-parameter elastic foundation is performed for the first time using isogeometric analysis(IGA)based on the non-uniform rational B-splines(NURBSs)basis *** types of porosity distributions affect the mechanical characteristics of materials:symmetric distribution,upper asymmetric distribution,and lower asymmetric *** stress–strain relationship for Biot porous materials was determined using the elastic *** general equations of motion of the nanoplates were established using the four-unknown shear deformation plate theory in conjunction with the nonlocal elastic theory and Hamilton’s principle.A computer program that uses IGA to determine the static bending and free and forced vibration of a nanoplate was developed on MATLAB software *** accuracy of the computational program was validated via numerical comparison with confidence *** set of programs presents the influence of the following parameters on the static bending and free and forced vibrations of nanoplates:porosity distribution law,porosity coefficient and geometrical parameters,elastic foundation,deviation angle,nonlocal coefficient,different boundary conditions,and Skempton *** numerical findings demonstrated the uniqueness of the FGFP plate’s behavior when the porosities are saturated with liquid compared with the case without *** findings of this study have significant implications for engineers involved in the design and fabrication of the aforementioned type of ***,this can form the basis for future research on the mechanical responses of the structures.

关键词： static bending free and forced vibrations nonlocal theory isogeometric analysis fluid-infiltrated porous nanoplates

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An isogeometric approach for nonlocal bending and free oscillation of magneto-electro-elastic functionally graded nanobeam with elastic constraints

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Frontiers of Structural and Civil Engineering 2024年第9期18卷 1401-1423页

作者： Thu Huong NGUYEN thi van Ke tran Quoc Hoa PHAM School of Mechanical and Automotive Engineering Hanoi University of IndustryHanoi 100000Vietnam Faculty of Mechanical Engineering Le Quy Don Technical UniversityHanoi 100000Vietnam Faculty of Engineering and Technology Nguyen Tat Thanh UniversityHo Chi Minh City 700000Vietnam

this work uses isogeometric analysis(IGA),which is based on nonlocal hypothesis and higher-order shear beam hypothesis,to investigate the static bending and free oscillation of a magneto-electro-elastic functionally graded(MEE-FG)nanobeam subject to elastic boundary constraints(BCs).The magneto-electric boundary condition and the Maxwell equation are used to calculate the variation of electric and magnetic potentials along the thickness direction of the *** study is innovative since it does not use the conventional boundary ***,an elastic system of straight and torsion springs with controllable stiffness is used to support nanobeams’beginning and end positions,creating customizable *** governing equations of motion of nanobeams are established by applying Hamilton’s principle and IGA is used to determine deflections and natural frequency *** studies were performed to evaluate the convergence and accuracy of the proposed *** from this,the impact of the input parameters on the static bending and free oscillation of the MEE-FG nanobeam is examined in *** findings could be valuable for analyzing and designing innovative structures constructed of functionally graded MEE materials.

关键词： elastic boundary conditions isogeometric analysis nanobeam via nonlocal theory grading of magneto-electro-elastic functions

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Assessment of different machine learning techniques in predicting the compressive strength of self-compacting concrete

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Frontiers of Structural and Civil Engineering 2022年第7期16卷 928-945页

作者： van Quan tran Hai-van thi MAI Thuy-Anh NGUYEN Hai-Bang LY Faculty of Civil Engineering University of Transport TechnologyHanoi 100000Vietnam

The compressive strength of self-compacting concrete(SCC)needs to be determined during the construction design *** paper shows that the compressive strength of SCC(CS of SCC)can be successfully predicted from mix design and curing age by a machine learning(ML)technique named the Extreme Gradient Boosting(XGB)algorithm,including non-hybrid and hybrid *** ML techniques,such as Linear regression(LR),K-Nearest Neighbors(KNN),Support Vector Machine(SVM),Decision Trees(DTR),Random Forest(RF),Gradient Boosting(GB),and Artificial Neural Network using two training algorithms LBFGS and SGD(denoted as ANN_LBFGS and ANN_SGD),are also compared with the XGB ***,the hybrid models of eight ML techniques and Particle Swarm Optimization(PSO)are constructed to highlight the reliability and accuracy of SCC compressive strength prediction by the XGB_PSO hybrid *** highest number of SCC samples available in the literature is collected for building the ML *** with previously published works’performance,the proposed XGB method,both hybrid and non-hybrid models,is the most reliable and robust of the examined techniques,and is more accurate than existing ML methods(R2=0.9644,RMSE=4.7801,and MAE=3.4832).Therefore,the XGB model can be used as a practical tool for engineers in predicting the CS of SCC.

关键词： compressive strength self-compacting concrete machine learning techniques particle swarm optimization extreme gradient boosting

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Organic dye removal and recycling performances of graphene oxide-coated biopolymer sponge

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Progress in Natural Science:Materials International 2022年第5期32卷 634-642页

作者： thi Sinh Vo tran thi Bich Chau Vo School of Mechanical Engineering Sungkyunkwan University Department of Industrial Management Can Tho University

In this study, a biopolymer sponge(PS) with a crosslinked mixture of gelatin-chitosan-poly(vinyl alcohol) was dipped into graphene oxide(GO) solution to form a composite sponge(CS, GO-coated PS) by a combination of simple dip-coating and freeze-drying procedures, as a sponge-like adsorbent in organic dye removal *** morphological, chemical, crystalline, mechanical and thermal characterizations of the as-obtained sponges were further investigated for the possible changes in the structure of sponge-like adsorbent after coating the GO sheets on the 3D porous structure of PS. The results showed that the CS had possessed effectively organic dye removal performances comparing to the PS. In the adsorption, the Langmuir and pseudo-second-order models corresponding to a monolayer approach and a chemical adsorption were appropriated. The maximum adsorption capacity of Rhodamine B and Congo red reached 126.8 and 135.0 mg·g-1; and 145.6 and 148.6 mg·g-1corresponding onto the PS and CS. It indicates that the maximum adsorption capacity on the CS enhanced significantly comparing to those on the PS owing to the functional GO sheets coated in the 3D porous structure of PS, which leads to supplying further functional adsorption sides on the whole 3D porous structure of CS. Notably, the sponges-like adsorbents could be regenerated and used again without a remarkable decrease of dye removal ability occurred in 9 adsorbing–desorbing cycles. Therefore, the CS prepared in this study can become a potential adsorbent for actual applications because of non-toxic materials, proper structural features, low-cost material and operation, and reliable recyclability.

关键词： Graphene oxide Biopolymer sponge Organic dye Adsorption Dye removal Recyclability

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Nonlocal isogeometric analysis for bidirectional functionally graded porous curved microbeams with arbitrary boundary conditions

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Acta Mechanica Sinica 2024年第8期40卷 194-218页

作者： Thu-Huong Nguyen thi van Ke tran van-Minh Phung van Hai Trinh Quoc Hoa Pham Faculty of Mechanical Engineering Hanoi University of IndustryHanoi100000Vietnam Faculty of Mechanical Engineering Le Quy Don Technical UniversityHanoi100000Vietnam Institute of Vehicle and Energy Engineering Le Quy Don Technical UniversityHanoi100000Vietnam Faculty of Engineering and Technology Nguyen Tat Thanh UniversityHo Chi Minh City700000Vietnam

this research aims to analyze the static bending and free vibration behaviors of bidirectional functionally graded porous(BFGP)curved microbeams with elastic boundary conditions resting on a Pasternak’s elastic foundation in a hygro-thermal *** analysis based on non-uniform rational B-splines,first-order shear deformation theory,nonlocal elasticity theory combined with the modified strain gradient theories,modified Timoshenko beam theory are formulated to depict bending and shear deformations of BFGP curved ***,because using the modified Timoshenko beam theory,this study removes the requirement for a shear correction factor and describes shear stress by zero at the upper and lower cross-sectional sites of the BFGP curved *** from traditional boundary conditions,where the beginning and end positions of a curved beam are connected by an elastic system of straight and torsion *** allows for greater flexibility in controlling the stiffness of the springs to obtain arbitrary *** assess the accuracy and convergence of the proposed approach,validation numerical examples were conducted in the various examples.

关键词： Bidirectional functionally graded porous material Elastic boundary condition Isogeometric analysis Curved microbeams Nonlocal elasticity theory Modified strain gradient theory

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Investigation of Polymorphisms in Coding Region of OsHKT1in Relation to Salinity in Rice

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Rice science 2016年第6期23卷 334-338页

作者： pham quynh-hoa tran xuan-an nguyen thi-nha-trang tran thi-thuy-anh hoang hai-yen nguyen thi-hong-van tang thi-hanh do thi-phuc Faculty of Biology VNU University of ScienceHanoi334 Nguyen TraiThanh XuanHanoiVietnam Faculty of Agronomy Vietnam National University of AgricultureNgo Xuan Quang StreetTrau QuyGia LamHanoiVietnam

Rice （Oryza sativa） is sensitive to salinity, but the salt tolerance level differs among cultivars,which might result from natural variations in the genes that are responsible for salt tolerance. High-affinitypotassium transporter （HKTs） has been proven to be involved in salt tolerance in plants. Therefore, wescreened for natural nucleotide polymorphism in the coding sequence of OsHKT1, which encodes the HKTprotein in eight Vietnamese rice cultivars differing in salt tolerance level. In total, seven nucleotidesubstitutions in coding sequence of OsHKT1 were found, including two non-synonymous and five synonymoussubstitutions. Further analysis revealed that these two non-synonymous nucleotide substitutions （G50Tand T1209A） caused changes in amino acids （Gly17Val and Asp403Glu） at signal peptide and the loop ofthe sixth transmembrane domain, respectively. To assess the potential effect of these substitutions on theprotein function, the 3D structure of HKT protein variants was modelled by using PHYRE2 webserver. Theresults showed that no difference was observed when compared those predicted 3D structure of HKTprotein variants with each other. In addition, the codon bias of synonymous substitutions cannot clearlyshow correlation with salt tolerance level. It might be interesting to further investigate the functional roles ofdetected non-synonymous substitutions as it might correlate to salt tolerance in rice.

关键词： polymorphism salt stress OsHKT1 gene rice

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The COVID-19 pandemic in the ASEAN: A preliminary report on the spread, burden and medical capacities

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Asian Pacific Journal of Tropical Medicine 2020年第6期13卷 247-251页

作者： Minh van Hoang Phuong thi Ngoc Nguyen Thao thi Phuong tran Long Quynh Khuong An thi Minh Dao Huy van Nguyen Riyanti Djalante Hanh thi Tuyet tran Hanoi University of Public Health HanoiVietnam Hanoi Medical University HanoiVietnam Graduate School of Public Health St.Luke's International UniversityTokyoJapan United Nations University-Institute for the Advanced Study of Sustainability(UNU-IAS) TokyoJapan

Objective:To provide preliminary descriptions of the spread,burden and related medical capacity characteristics of the ASEAN ***:We utilized the data from four main official databases,including WHO reports,the Statistics and Research of the Coronavirus Disease,and the Southeast Asia Program of the Center for Strategic and International *** spread of the COVID-19 pandemic,current burden and the COVID-19 medical response capacities were extracted before April 11,***:As of April 13,2020,the ASEAN countries reported19547 COVID-19 positive cases with 817 deaths(case-facility rate of 4.2%).Thailand was the first country in the region that reported having the COVID-19 cases,while Laos was the last to report confirmed COVID-19 *** for the number of deaths to double were between 8-12 *** the testing and treatment capacities,the number of PCR tests provided to the populations was the highest in Vietnam,followed by Singapore,Malaysia,and ***,the percentage of the population being tested was the highest in Brunei(2.31%),followed by Singapore(1.30%).Conclusions:A wide range of interventions were taken into practice in response to the outbreak with an effort of curbing the rise of this ***,special care should not be overlooked as the pandemic is placing a huge impact on the population and becomes increasingly *** tackle the spread of the pandemic in the region,the ASEAN countries should work together as one community to provide better responses to future pandemics and other transboundary public health challenges.

关键词： COVID-19 SARS-CoV-2 ASEAN South-East Asia Epidemiology

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Graphene oxide-covered melamine foam utilizing as a hybrid foam toward organic dye removal and recyclability

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Progress in Natural Science:Materials International 2022年第3期32卷 296-303页

作者： thi Sinh Vo tran thi Bich Chau Vo School of Mechanical Engineering Sungkyunkwan University Department of Industrial Management Can Tho University

Graphene-based adsorbents have been attracted extensive interest in recent years. Herein, graphene oxidecovered melamine foam(GO-covered MF) was designed and prepared by a mild submerge-covering method with the support of a super-hydrophilic melamine framework, showing its adsorption performances for various organic dyes. The structure morphology as well as chemical, thermal and mechanical properties of the as-obtained hybrid foam(HF) were further determined for the possible structure changes after covering the GO sheets on the MF framework. Moreover, the HF exhibited an excellent ability for organic dye adsorption application, and which was well fitted in the pseudo-second-order kinetic and Langmuir models corresponding to a chemical adsorption and a mono-layer approach during the adsorption process. The maximum adsorption capacity by using the asobtained HF corresponded to 258.56 mg g-1(methylene blue), 233.22 mg g-1(Rhodamine B), 206.92 mg g-1(methyl orange), and 184.93 mg g-1(Congo red), which are competitive with that of other graphene-based absorbents. In particular, the HF could be reused without a noticeable degradation of organic dye removal performance. As such, the HF prepared in this study can become an encouraging candidate for practical application owing to the reliable recyclability and low-cost.

关键词： Graphene oxide Melamine foam Organic dye Adsorption Hybrid foam Recyclability

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