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Can the 5-colour nutrition label“Nutri-Score”improve the health value of food?

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Journal of Future Foods 2023年第4期3卷 306-311页

作者： Robin C.hau Klaus W.Lange Schmalkalden University of Applied Sciences Schmalkalden 98564Germany Faculty of Human Sciences University of RegensburgRegensburg 93040Germany

Obesity and other nutrition-related non-communicable diseases were virtually non-existent before the advent of industrialized food *** recent years,a 5-color front-of-package food label(“Nutri-Score”)seeking to demonstrate the overall nutritional value and healthiness of food products has been adopted for voluntary use in some European *** Nutri-Score is mainly based on the sugar,salt and calorie content of food *** present viewpoint discusses whether the Nutri-Score correctly identifies healthy and unhealthy food items and how large an impact the Nutri-Score may have on consumers’***,other benefits as well as hidden costs and drawbacks in implementing the Nutri-Score will be *** its reducing of the complex information regarding the contents of foods,the Nutri-Score may provide easily intelligible information regarding healthy nutrition and may become a valuable tool in educating consumers and influencing their food *** Nutri-Score may not become a game-changer in combating poor nutrition,but it is helpful in the right *** an inexpensive public policy,such as front-of-package labeling,makes some positive contribution,there is no reason to argue against its *** small effects may be relevant when a measure is adopted at population level.

关键词： Front-of-package food labeling Nutri-Score Food choice Food health value Obesity

An Efficient Neural-Network and Finite-Difference Hybrid Method for Elliptic Interface Problems with Applications

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Communications in Computational Physics 2023年第4期33卷 1090-1105页

作者： Wei-Fan Hu Te-Sheng Lin Yu-hau Tseng Ming-Chih Lai Department of Mathematics National Central UniversityTaoyuan 32001Taiwan Department of Applied Mathematics National Yang Ming Chiao Tung UniversityHsinchu 30010Taiwan Department of Applied Mathematics National University of KaohsiungKaohsiung 81148Taiwan National Center for Theoretical Sciences National Taiwan UniversityTaipei 10617Taiwan

A new and efficient neural-network and finite-difference hybrid method is developed for solving Poisson equation in a regular domain with jump discontinuities on embedded irregular *** the solution has low regularity across the interface,when applying finite difference discretization to this problem,an additional treatment accounting for the jump discontinuities must be ***,we aim to elevate such an extra effort to ease our implementation by machine learning *** key idea is to decompose the solution into singular and regular *** neural network learning machinery incorporating the given jump conditions finds the singular solution,while the standard five-point Laplacian discretization is used to obtain the regular solution with associated boundary *** of the interface geometry,these two tasks only require supervised learning for function approximation and a fast direct solver for Poisson equation,making the hybrid method easy to implement and *** two-and three-dimensional numerical results show that the present hybrid method preserves second-order accuracy for the solution and its derivatives,and it is comparable with the traditional immersed interface method in the *** an application,we solve the Stokes equations with singular forces to demonstrate the robustness of the present method.

关键词： Neural networks sharp interface method fast direct solver elliptic interface problem Stokes equations

Engineering versatile Au-based catalysts for solar-to-fuel conversion

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Journal of Energy Chemistry 2023年第8期83卷 341-362,I0010页

作者： Chunhua Wang Hongwen Zhang Feili Lai Zhirun Xie Yun hau Ng Bo Weng Xuejiao Wu Yuhe Liao Department of Chemistry KU LeuvenCelestijinenlaan 200F3001 LeuvenBelgium cMACS Department of Microbial and Molecular SystemsKU LeuvenCelestijnenlaan 200F3001 LeuvenBelgium School of Energy and Environment City University of Hong Kong83 Tat Chee AvenueKowloonHong Kong 999077China Centre for Sustainable Catalysis and Engineering Faculty of Bioscience EngineeringKU Leuven3001 LeuvenBelgium Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640GuangdongChina

Gold(Au) nanostructures(NSs) have been widely employed as cocatalysts to improve the photoactivity of semiconductor materials, while a systematic summary of the engineering approaches of Au NSs to maximize the solar-to-fuel conversion efficiency is still lacking. In this review, the recently developed strategies for elevating the overall photocatalytic performance of Au-based catalysts and the deep physical chemistry mechanisms are highlighted. Firstly, the synthetic approaches of Au NSs are summarized, followed by an elaboration on their multiple functions in improving photoactivity. Afterward, modification strategies of Au NSs used to enhance the photocatalytic efficiency of Au-semiconductor composites,including controlling the Au NSs morphology, size, crystal phase, defect engineering, alloying with different metals, modulating interfacial interaction, and introducing an external field, are summarized and discussed independently. Additionally, advanced characterization techniques that can provide insights into the charge dynamics of the photocatalysts are introduced. Finally, we share our opinion on the challenges and outline potentially promising opportunities and directions for efficient Au-based photocatalysis research moving forward. We sincerely look forward to this review can deliver insightful views to design efficient Au-based photocatalysts and spur certain innovations to other metal-based catalysts.

关键词： Au nanostructures Modification strategies Semiconductor Photocatalysis Solar-to-fuel conversion

SYNTHESIS AND CHARACTERIZATION OF NANO METALS WITH CORE-SHELL STRUCTURE

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China Particuology 2004年第4期2卷 160-163页

作者： Ru-ShiLiu hau-MingChen Shu-FenHu DepartmentofChemistry TaiwanUniversityTaipei106China NanoDeviceLaboratories Hsinchu300China

Using Aucore-Ptshell as an example, the synthesis and characterization of nano metals with core-shell structure is demonstrated in a systematic study on the amount-dependent morphology change in a series of Au-Pt bimetallic nanoparticles synthesized using chemical reduction. While the amount of Au precursor is kept constant throughout the whole series of compounds to obtain a fixed Au core size (7.5 nm), the Au/Pt ratio is varied from 1/1 to 1/4 in order to synthesize Pt shell layers of different thickness. We observed a remarkable shift of surface plasmon band to around 410 nm. With the aid of high resolution transmission electron microscope (HRTEM) and energy-dispersive spectrometer (EDS), the composition of the shell layer is found to be a Pt-enriched Au-Pt alloy. As the amount of Pt increases, string-like Pt clusters form on the surface of the nanoparticles. The average diameter of these Pt clusters is about 2 nm. This special structure may possess unique catalytic properties.

关键词： nanoparticle bimetallic gold core-shell

Polymorphisms of MTHFR and susceptibility to oesophageal adenocarcinoma in a Caucasian United Kingdom population

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World Journal of Gastroenterology 2014年第34期20卷 12212-12216页

作者： Richard Keld Manyi Thian Chia hau Jamil Sajid Narveen Kumar Yeng Ang Department of Gastroenterology Royal Albert Edward InfirmaryWiganLancashire WN1 2NNUnited Kingdom Faculty of Human and Medical Sciences University of ManchesterManchesterSalford M6 8HDUnited Kingdom

AIM: To identify if methylene tetra-hydrofolatereductase (MTHFR) C677T polymorphisms are associated with oesophageal adenocarcnomas in a Caucasian population and to test whether folic acid and homocysteine levels are ... 详细信息

关键词： Polymorphisms of 5,10-methylenetetrahydrofolate reductase Oesophageal adenocarcinoma Caucasian population Helicobacter pylori Polymorphism

FeCo alloy@N-doped graphitized carbon as an efficient cocatalyst for enhanced photocatalytic H2 evolution by inducing accelerated charge transfer

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Journal of Energy Chemistry 2021年第1期30卷 92-101,I0004页

作者： Sibo Chen Yun hau Ng Jihai Liao Qiongzhi Gao Siyuan Yang Feng Peng Xinhua Zhong Yueping Fang Shengsen Zhang Key Laboratory for Biobased Materials and Energy of Ministry of Education College of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643GuangdongChina Guangdong Laboratory for Lingnan Modern Agriculture Guangzhou 510643GuangdongChina School of Energy and Environment City University of Hong KongHongkong 999077China Department of Physics South China University of TechnologyGuangzhou 510640GuangdongChina School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006GuangdongChina

Cocatalysts play important roles in improving the activity and stability of most *** is of great significance to develop economical,efficient and stable ***,using Na2CoFe(CN)6 complex as precursor,a novel noble-metal-free FeCo@NGC cocatalyst(nano-FeCo alloy@N-doped graphitized carbon) is fabricated by a simple pyrolysis *** with g-C3 N4, the optimal FeCo@NGC/g-C3N4 receives a boosted visible light driven photocatalytic H2 evolution rate of 42.2 μmol h-1, which is even higher than that of 1.0 wt% Pt modified g-C3N4 *** on the results of density functional theory(DFT) calculations and practical experiment measurements,such outstanding photocatalytic performance of FeCo@NGC/g-C3N4 is mainly attributed to two *** is the accelerated charge transfer behavior,induced by a photogene rated electrons secondary transfer performance on the surface of FeCo alloy *** other is related to the adjustment of H adsorption energy(approaching the standard hydrogen electrode potential) by the presence of external NGC thin *** factors play key roles in the H2 evolution *** outstanding performance highlights an enormous potential of developing noble-metal-free bimetallic nano-alloy as inexpensive and efficient cocatalysts for solar applications.

关键词： FeCo alloy nanoparticles Cocatalyst N-doped graphitized carbon g-C3N4 Visible light Hydrogen evolution

Development of Virtual Equipment for a Hydraulic Mechanics Experiment

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Tsinghua Science and Technology 2008年第S1期13卷 261-265页

作者： CHAN Ying-Chieh CHEN Ya-Hsin KANG Shih-Chung LEE Tim-hau Department of Civil Engineering Taiwan University

Laboratory class is very important in the education of hydraulic mechanics. However, it usually requires a high expenditure on equipment purchase and maintenance. Virtual equipment that renders the equipment in a virtual world and provides an interactive interface for users can be an ideal solution to reduce costs. In this research, we focus on developing virtual equipment for a Venturi tube experiment. We em-ployed multiple paper-prototypes to gather user feedback on the preliminary design. Following the final pro-totype, we then implemented the virtual equipment on computers. Interactive functions have been built into the virtual equipment. Users are able to manipulate the equipment and obtain real-time feedback as if they were using actual equipment. The results show that the development of the virtual equipment is technically feasible.

关键词： virtual reality engineering education user interface

Supramolecular Self-assembly of Amphiphilic Alkynylplatinum(II)2,6-Bis(N-alkylbenzimidazol-2′-yl)pyridine Complexes

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Chemical Research in Chinese Universities 2021年第5期37卷 1079-1084页

作者： Andy Shun-Hoi CHEUNG Sammual Yu-Lut LEUNG Franky Ka-Wah hau Vivian Wing-Wah YAM Institute of Molecular Functional Materials and Department of Chemistry The University of Hong KongPokfulam RoadHong KongP.R.China

Alkynylplatinum(II)bzimpy complexes of trimethylammoniumbenzylethynyl ligand have been synthesized and *** with long alkyl chains have been found to exhibit interesting self-assembly properties in the acetonitrile *** amphiphilic nature of the complexes has led to the formation of nanorods,as revealed by electron microscopy *** increasing the polarity of the solvent media has given rise to the enhancement of low-energy emission.

关键词： solution. platinum alkyl

CT Brain Image:Abnormalities Recognition and Segmentation

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Journal of Donghua University(English Edition) 2010年第2期27卷 246-249页

作者： TONG hau-Lee Mohammad Faizal Ahmad Fauzi Ryoichi Komiya HAW Su-Cheng Faculty of Information Technology Multimedia UniversityJalan Multimedia Faculty of Engineering Multimedia UniversityJalan Multimedia

In order to develop an automated segmentation system for Computed Tomography （CT） brain images, a new approach which consists of several unsupervised segmcotation techniques was introduced. The system segments the CT brain images into three partitions, i. e., abnormalities, cerebrospinal fluid （CSF）, and brain matter. Our approach consists of two phase-segmentation methods. In the first phase segmentation, k-means and fuzzy cmeans （FCM） methods were implemented to segment and transform the images into the binary images. Based on the connected component in binary images, a decision tree was employed for the annotation of normal or abnormal regions. In the second phase segmentation, the modified FCM with population-diameter independent （PDI） segmentation was applied to segment the images into CSF and brain matter. The experimental results have shown that our proposed system is feasible and yield satisfactory results.

关键词： computed tomography ursupervised segmentation k-means fuzzy c-means population-diameter indepentdent