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A comparative study between ionic liquid coating and counterparts in bulk for toluene absorption

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Green Chemical Engineering 2020年第2期1卷 147-154页

作者： Ventura Castillo Ramos Wei Han king Lun yeung Division of Environment and Sustainability Hong Kong SARChina Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SARChina

The structure-activity relationship(SAR)for toluene absorption and desorption in ionic liquids(ILs)has been investigated for seven commercial ILs in bulk and thin liquid *** with imidazolium cations of different alkyl chain lengths and a Hofmeister series of anions including[CH3COO],[I],[BF4],[HSO4],and[PF6]were *** capacity for toluene increases with increasing kosmotropicity of the cation and anion,while the absorption rate in bulk ILs is governed by viscosity and that in thin ILs layer by the oil-water partition coefficient(Kow).A regenerability coefficient(Rp)measures toluene desorption and IL *** release rate as measured by dRp/dt correlates well with the Kow and viscosity of the ILs and tx,the time required to completely desorb toluene is related to its ionic strength as measured from v(C2H)of the imidazolium *** properties are in turn governed by the kosmotropicity of the cation and anion pair forming the IL.

关键词： Ionic liquids Volatile organic compounds Absorption Air purification Structure-activity relationship

Outcome of 1355 consecutive transabdominal chorionic villus samplings in 1351 patients

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chinese Medical Journal 2005年第20期118卷 1675-1681页

作者： LAU Tze kin LEUNG Tak yeung FUNG Tak Yuen CHAN Lin Wai Daljit S SAHOTA LEUNG Tse Ngong Fetal Medicine Unit Department of Obstetrics and Gynaecology Prince of Wales Ho spitalChinese University of Hong KongShatinHong Kong SARChina

Background The true risk of choronic villus sampling(CVS)is poorly *** objective of this study was to review the clinical outcome of transabdominal CVS performed in a university teaching unit,with an emphasis on the complication *** A comprehensive audit database was maintained for 1351 pregnant women,including 17 sets ot twin pregnancies,who had a *** and outcome of all CVSs made in the unit between May 1996 and May 2004 were *** CVSs were performed by one of 5 operators using the identical *** All procedures were performed transabdominally.A total of 1355 CVSs were performed because there were 4 dichorionic twin pregnancies which required 2 *** mean gestation at CVS was(11.8+0.7)weeks,and 97.3%of the procedures were performed between 11 and 13 completed *** majority(96.2%)required only 1 puncture to achieve correct needle *** procedure failed to obtain an adequate sample in 4 subjects(0.30%).A total of 1351 chromosomal studies were requested and there was 1 case(0.07%)of culture *** results of chromosomal studies were available within 14 days in 36.7%of the cases and within 21 days in 94.0%.Overall,77 chromosomal abnormalities(5.7%)and 5 cases of thalassemia major were *** outcome was unknown in only 13 singleton subjects(0.96%).In the remaining 1355 fetuses,there were 76 pregnancy terminations(5.56%),10 fetal losses with obvious obstetric causes(0.73%),and 21 potentially procedure-related fetal losses(1.54%).In the last group,the majority had one or more co-existing obstetric *** background fetal loss rate for pregnancies at similar gestational age in the unit was about 0.8%.Therefore,the procedure-related fetal loss rate was estimated to be at the maximum of 0.74%.Conclusions In experienced hands,first trimester transabdominal CVS is an accurate and safe invasive prenatal diagnostic *** should be one of the treatment options available to pregn

关键词： chorionic villus sampling postoperative complication pregnancy outcome

Insights on advanced substrates for controllable fabrication of photoanodes toward efficient and stable photoelectrochemical water splitting

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Carbon Energy 2024年第4期6卷 164-221页

作者： Huilin Hou Gang Shao Yang Wang Wai‐yeung Wong Weiyou Yang Institute of Micro/Nano Materials and Devices Ningbo University of TechnologyNingboChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhouChina Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong KongChina

Conversion of solar energy into H_(2) by photoelectrochemical(PEC)water splitting is recognized as an ideal way to address the growing energy crisis and environmental *** a typical PEC cell,the construction of photoanodes is crucial to guarantee the high efficiency and stability of PEC reactions,which fundamentally rely on rationally designed semiconductors(as the active materials)and substrates(as the current collectors).In this review work,we start with a brief introduction of the roles of substrates in the PEC ***,we provide a systematic overview of representative strategies for the controlled fabrication of photoanodes on rationally designed substrates,including conductive glass,metal,sapphire,silicon,silicon carbide,and flexible ***,some prospects concerning the challenges and research directions in this area are proposed.

关键词： hydrogen photoanode photoelectrochemical substrates water splitting

Network coding theory:An introduction

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Frontiers of Electrical and Electronic Engineering in china 2010年第3期5卷 363-390页

作者： Raymond W.yeung Institute of Network Coding and Department of Information Engineering The Chinese University of Hong KongHong KongChina

For a long time,store-and-forward had been the transport mode in network *** other words,information had been regarded as a commodity that only needs to be routed through the network,possibly with replication at the intermediate *** the late 1990’s,a new concept called network coding fundamentally changed the way a network can be *** the paradigm of network coding,information can be processed within the network for the purpose of *** was demonstrated that compared with store-and-forward,the network throughput can generally be increased by employing network *** then,network coding has made significant impact on different branches of information *** impact of network coding has gone as far as mathematics,physics,and *** expository work aims to be an introduction to this fast-growing subject with a detailed discussion of the basic theoretical results.

关键词： network coding network communications wireless communications cryptography

Recent progress of electronic materials based on 2,1,3-benzothiadiazole and its derivatives:synthesis and their application in organic light-emitting diodes

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Science china Chemistry 2021年第3期64卷 341-357页

作者： Youming Zhang Jun Song Junie Qu Peng-Cheng Qian Wai-yeung Wong Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy1 The Hong Kong Polytechnic University(PolyU)Hung HomHong KongChina PolyU Shenzhen Research Institute Shenzhen 518057China College of Materials Science and Engineering Shenzhen UniversityShenzhen 518060China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering.Shenzhen UniversityShenzhen 518060China Key Laboratoty of Environmental Functional Materials Technology and Application of Wenzhou City Institute of New Materials&IndustiyCollege of Chemistry&Materials Engineering.Wenzhou UniversityWenzhou 325035China

2,1,3-Benzothiadiazole(BT)and its derivatives are very important acceptor units used in the development of photoluminescent compounds and are applicable for the molecular construction of organic light-emitting diodes,organic solar cells and organic field-effect *** to their strong electron-withdrawing ability,construction of molecules with the unit core of BT and its derivatives can usually improve the electronic properties of the resulting organic *** this contribution,we review the synthesis of various polymers,small molecules and metal complexes with BT and its derivatives and their applications in organic light-emitting ***,the molecular design rules based on these cores are discussed.

关键词： 2,1,3-benzothiadiazole organic light-emitting diodes synthesis electronic properties photoluminescence

Anti-tumor immunity of BAM-SiPc-mediated vascular photodynamic therapy in a BALB/c mouse model

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Cellular & Molecular Immunology 2017年第2期14卷 223-234页

作者： Hing-Yuen yeung Pui-chi Lo Dennis K.P. Ng Wing-Ping Fong School of Life Sciences The Chinese University of Hong Kong Shatin N.T. Hong Kong China Department of Biomedical Sciences City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong China Department of Chemistry The Chinese University of Hong Kong Shatin N.T. Hong Kong China

In recent decades, accumulating evidence from both animal and clinical studies has suggested that a sufficiently activated immune system may strongly augment various types of cancer treatment, including photodynamic therapy （PDT）. Through the generation of reactive oxygen species, PDT eradicates tumors by triggering localized tumor damage and inducing anti-tumor immunity. As the major component of anti-tumor immunity, the involvement of a cell-mediated immune response in PDT has been well investigated in the past decade, whereas the role of humoral immunity has remained relatively unexplored. In the present investigation, using the photosensitizer BAM-SiPc and the CT26 tumor-bearing BALB/c mouse model, it was demonstrated that both cell-mediated and humoral adaptive immune components could be involved in PDT. With a vascular PDT （VPDT） regimen, BAM-SiPc could eradicate the tumors of -70% of tumor-bearing mice and trigger an anti-tumor immune response that could last for more than 1 year. An elevation of Th2 cytokines was detected ex vivoafter VPDT, indicating the potential involvement of a humoral response. An analysis of serum from the VPDT-cured mice also revealed elevated levels of tumor-specific antibodies. Moreover, this serum could effectively hinder tumor growth and protect the mice against further re-challenge in a T-cell-dependent manner. Taken together, these results show that the humoral components induced after BAM-SiPc-VPDT could assist the development of anti-tumor immunity.

关键词： anti-tumor immunity damage-associated molecular patterns humoral immunity photodynamic therapy tumor-bearing mice

APACHE system is better than Ranson system in the prediction of severity of acute pancreatitis

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Hepatobiliary & Pancreatic Diseases International 2006年第2期5卷 294-299页

作者： Yuk Pang yeung Billy yeung Kit Lam Andrew Wai Chun Yip Department ot Surgery Kwong Wah Hospital 25 Waterloo Road Kowloon Hong Kong China

BACKGROUND: It has been suggested that addition of obesity score to the APACHE-Ⅱ system can lead to more accurate prediction of severity of acute pancreatitis. However there is scanty information on the usefulness of the combined APACHE-O scoring system in Asian patients. This study aimed to compare the accuracy of Ranson, APACHE-Ⅱ and APACHE-O systems in assessing severity of acute pancreatitis in a local chinese population. METHODS: One hundred and one consecutive patients with acute pancreatitis were prospectively studied. Body mass index (BMI) was measured on admission. Ranson score, APACHE-Ⅱ and APACHE-O scores were recorded on admission and at 48 hours. By adopting the cut-off levels and definitions advocated in the Atlanta consensus for severe disease, the diagnostic accuracy of the three scoring systems was compared by the area under the curve (AUC) under the receiver operator characteristic curve. RESULTS: Of the 101 patients, 12 (11.9%) patients suffered from severe pancreatitis. Obesity was uncommon and only two patients (2.0%) had BMI >30. Eighty-two (81.2%) patients were normal weight (BMI≤25) whereas 17 (16.8%) were overweight ( BMI 25-30 ). Overweight or obesity (BMI >25) was not associated with severe pancreatitis (P= 0.40). The AUC for admission scores of Ranson, APACHE-Ⅱ, and APACHE-O systems was 0. 549, 0. 904 and 0. 904, respectively. The AUC for 48-hour scores of Ranson, APACHE-Ⅱ and APACHE-O systems was 0.808, 0.955 and 0.951, respectively. CONCLUSIONS: The APACHE-Ⅱ scoring system is more accurate than the Ranson scoring system of the prediction of severity in acute pancreatitis. Addition of obesity score does not significantly improve the predictive accuracy of the APACHE-Ⅱ system in our local population with a low prevalence of obesity.

关键词： acute pancreatitis APACHE-Ⅱ score APACHE-O score disease severity Ranson score

Novel N-heteroaromatic dyes for textile substrates

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chinese Chemical Letters 2014年第8期25卷 1165-1168页

作者： Kim-Hung Lam Sarah Sze-Wah Ho Pik-Ling Lam Johnny Cheuk-On Tang Zhao-Xiang Bian Albert Sun-chi Chan Hua Li Wai-yeung Wong Chung-Hin Chui Department of Applied Biology and Chemical Technology Institute of Textile and Clothing The Hong Kong Polytechnic University Clinical Division School of Chinese Medicine Hong Kong Baptist University Institute of Molecular Functional Materials Department of Chemistry and Institute of Advanced Materials Hong Kong Baptist University College of Life and Environmental Sciences Minzu University of China HKBU Institute of Research and Continuing Education Shenzhen Virtual University Park

This study reports the synthesis and characterization of quinoline derivatives. The synthesized quinoline compounds were applied to the dyeing treatment of acrylic fabrics. The color fastness to washing and light of quinoline compound-dyed fabrics was examined. Human skin HaCaT cell line was also used for the skin cytotoxicity evaluation of the quinoline compound-dyed acrylic fabrics.

关键词： Acrylic fabrics Fluorescent Quinoline dyes Skin cytotoxicity

Massachusetts General Hospital and the Shanghai Mental Health Center:the past,present and future of a psychiatric research partnership

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General Psychiatry 2019年第6期32卷 346-348页

作者： Tristan Barako Chunbo Li Albert yeung Development Massachusetts General HospitalBostonMassachusettsUSA Shanghai Key Laboratory of Psychotic Disorders Shanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghaiChina Psychiatry Massachusetts General HospitalBostonMassachusettsUSA Psychiatry Harvard Medical SchoolBostonMassachusettsUSA

INTRODUCTION There are many obstacles to developing,maintaining and strengthening international research collaborations,whether they are posed by geography,culture or,most recently,global economics and *** is critically important to overcome these obstacles,especially when it comes to fostering the types of breakthrough biomedical science that benefit from diverse perspectives,methodologies and data ***,the research underlying these breakthroughs unfolds over the course of years,and even *** these reasons,and more,the Department of Psychiatry at Massachusetts General Hospital(Mass General)and the Shanghai Mental Health Center(SMHC)are taking the long view:exploring and implementing numerous collaborative research and training projects that are leading to better care and treatments for patients,both in the USA and china,who suffer from a range of psychiatric disorders.

关键词： breakthrough overcome Massachusetts