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Visible light-induced degradation of organic pollutants using Fe(II) supported on silica gel as an effective catalyst

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Chinese Science Bulletin 2008年第10期53卷 1497-1502页

作者： ZHAO Chao HUANG YingPing FANG YanFen JIANG LiRong LIU LiMing king Tong lau Center for Ecologic and Environment Science China Three Gorges University Yichang 443002 China College of Chemistry Central China Normal University Wuhan 430070 China School of Chemical -Sciences National Centre for Sensor Research Dublin City University Dublin Ireland

Silica gel-supported Fe(II) (SiOFe) was prepared and used for heterogeneous degradation of sulforho-damine B (SRB) and 2,4-dichlorophenol (DCP) under visible irradiation (λ > 420 nm) as an effective catalyst. UVvisible spectra, and infrared Spectrophotometry (IR), fluorescence, total organic carbon (TOC) and electron spin resonance (ESR) measurements were employed to analyze the photoreaction products. The results showed that SRB could be efficiently degraded by SiOFe/H2O2 system under visible irradiation with 100% decolorization and 72.3% TOC removal after 180 min illumination. The results of ESR and fluorescence measurements indicated that the oxidative process was predominated mainly by the hydroxyl radical (·OH) generated in the system.

关键词：二氧化硅凝胶剂异质性光催化剂辐射度

基于聚苯胺纳米纤维的气体传感元件构建及传感性能

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化工学报 2008年第S1期59卷 84-87页

作者：曾繁武刘晓霞 king Tong lau Dermot Diamond 东北大学化学系中国-爱尔兰先进材料及传感器联合研发中心 CHINA-IRELAND CENTER FOR ADVANCED MATERIALS AND SENSOR DEVELOPMENT NATIONAL CENTRE FOR SENSOR RESEARCHDUBLIN CITY UNIVERSITY辽宁沈阳110004

在丝网印刷碳电极的0.125 mm绝缘带上直接铺展微观孔径为300～400 nm的聚苯胺(PANI)纳米纤维(直径60 nm)薄膜,构建气体传感元件。通过监测甲苯、乙醇及二氯甲烷蒸气对气体传感元件电阻的影响研究其对挥发性有机溶剂蒸气的传感性能。利... 详细信息

在丝网印刷碳电极的0.125 mm绝缘带上直接铺展微观孔径为300～400 nm的聚苯胺(PANI)纳米纤维(直径60 nm)薄膜,构建气体传感元件。通过监测甲苯、乙醇及二氯甲烷蒸气对气体传感元件电阻的影响研究其对挥发性有机溶剂蒸气的传感性能。利用扫描电镜(SEM)分析研究了PANI纳米纤维的形貌。

关键词：聚苯胺纳米纤维气体传感元件挥发性有机溶剂甲苯乙醇二氯甲烷

Simple Modifications to Standard TRIzol®Protocol Allow High-Yield RNA Extraction from Cells on Resorbable Materials

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Journal of Biomaterials and Nanobiotechnology 2011年第1期2卷 41-48页

作者： Juliana Tsz Yan Lee Wai Hung Tsang king lau Chow 不详

Resorbable bioceramics are attractive for medical applications such as bone substitution. Biochemical analysis on cells cultured on these biomaterials is vital to predict the impact of the materials in vivo and RNA extraction is an essential step in gene expression study using RT-qPCR. In this study, we describe simple modifications to the TRIzol? RNA extraction protocol widely used in biology and these allow high-yield extraction of RNA from cells on resorbable calcium phosphates. Without the modifications, RNA is trapped in the co-precipitated calcium compounds, rendering TRIzol? extraction method infeasible. Among the modifications, the use of extra TRIzol? to dilute the lysate before the RNA precipitation step is critical for extraction of RNA from porous ?-tricalcium phosphate (?-TCP) discs. We also investigate the rationale behind the undesirable precipitation so as to provide clues about the modifications required for other resorbable materials with high application potential in bone tissue engineering.

关键词： Calcium Phosphate Resorbable Materials RNA Extraction TRIzol Acid Guanidium Thiocyanate - Phenol - Chloroform Extraction TRI Reagent TRIsure

Comparative In Vitro Osteoinductivity Study of CaP Ceramics (HA, α-TCP, β-TCP) using 10T1/2 Cells with Different Controls and Possible Correlations with Other Systems

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Journal of Biomaterials and Nanobiotechnology 2011年第2期2卷 162-171页

作者： Juliana Tsz Yan Lee Kefeng Wang Wai Hung TSANG king lau Chow 不详

In this study, we use a pluripotent mesenchymal stem cell (MSC) model, C3H/10T1/2, to evaluate three calcium phos-phate (CaP) materials, namely the hydroxyapatite (HA), α-tricalcium phosphate (α-TCP) and β-tricalcium phosphate (β-TCP). 10T1/2 cell was chosen as it has advantages over its counterparts in terms of ease of maintenance, free of ethical concerns and also more reproducible results. ALP enzymatic assay, RT-qPCR, DAPI staining and SEM were employed to assess the osteoinductivity of these materials. A good reference material which also acts as a scientific control is necessary for comparisons of results from different experimental batches and hence other materials such as titanium, Nunclon plastic surface, BD Falcon plastic surface and gold coated porous HA were also tested. The results show that ceramics induce a more sustained osteo-differentiation state as compared with plastics. Inductivity was found to be acting in descending order of strength with HA > β-TCP > α-TCP, which is reversed in terms of their impact on proliferation rate (HA TCP) and in vivo osteoinductivity in terms of incidence and quality of bone described previously (HA > β-TCP > α-TCP). These confirm the suitability of using 10T1/2 cells in cell culture assay of osteoinductivity.

关键词： Bone Tissue Engineering Stem Cell Calcium Phosphate Hydroxyapatite Gene Expression Osteo-Inductivity In Vitro Test Pcr (Polymerase Chain Reaction) Sem (Scanning Electron Microscopy)

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RUP:开发过程控制利刃

软件世界 2007年第10期 59-62页

作者： king lau

信息技术市场流行的方法论有RUP、The Zachman Framework、XP等。在这些方法论中,最流行的要数RUP。RUP提供的是帮助人们更出色地工作的知识基础。

关键词： RUP 过程控制 Framework 开发技术市场知识基础方法论信息

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Cellular & Molecular Immunology 2021年第4期18卷 1005-1015页

作者： Xuezhen Zeng Jingying Zhou Zhewen Xiong Hanyong Sun Weiqin Yang Myth T.S.Mok Jing Wang Jingqing Li Man Liu Wenshu Tang Yu Feng Hector Kwong-Sang W ang Shun-Wa Tsang king-lau Chow Philip Chun Yeung John Wong Paul Bo-San Lai Anthony Wing-Hung Chan Ka Fai To Stephen Lam Chan Qiang Xia Jing Xue Xiao Chen Jun Yu Sui Peng Joseph Jao-Yiu Sung Ming Kuang Alfred Sze-Lok Cheng School of Biomedical Sciences The Chinese University of Hong KongHong Kong SARChina lnstitute of Precision Medicine The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Department of Liver Surgery The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Department of Pharmacy The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Department of Anatomical and Cellular Pathology The Chinese University of Hong KongHong Kong SARChina Department of Liver Surgery Ren Ji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Gastroenterology The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Division of Life Science Hong Kong University of Science and TechnologyHong Kong SARChina Department of Surgery The Chinese University of Hong KongHong Kong SARChina State Key Laboratory of Translational Oncology The Chinese University of Hong KongHong Kong SARChina Department of Clinical Oncology The Chinese University of Hong KongHong Kong SARChina State Key Laboratory of Oncogenes and Related Genes Stem Cell Research CenterRen Ji HospitalSchool of MedicineShanghai Cancer InstituteShanghai Jiao Tong UniversityShanghaiChina Department of Medicine and Therapeutics The Chinese University of Hong KongHong Kong SARChina State Key Laboratory of Digestive Disease The Chinese University of Hong KongHong Kong SARChina Clinical Trial Unit The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Cancer Center The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina

The liver is an immunologically tolerant organ and a common metastatic site of multiple cancer *** a role for cancer cell invasion programs has been well characterized,whether and how liver-intrinsic factors drive metastatic spread is incompletely ***,we show that aberrantly activated hepatocyte-intrinsic cell cycle-related kinase(CCRK)signaling in chronic liver diseases is critical for cancer metastasis by reprogramming an immunosuppressive *** an inducible liverspecific transgenic model,we found that CCRK overexpression dramatically increased both B16F10 melanoma and MC38 colorectal cancer(CRC)metastasis to the liver,which was highly infiltrated by polymorphonuclear-myeloid-derived suppressor cells(PMNMDSCs)and lacking natural killer T(NKT)*** of PMN-MDSCs in CCRK transgenic mice restored NKT cell levels and their interferon gamma production and reduced liver metastasis to 2.7% and 0.7%(metastatic tumor weights)in the melanoma and CRC models,***,CCRK activated nuclear factor-kappa B(NF-κB)signaling to increase the PMN-MDSC trafficking chemokine C-X-C motif ligand 1(CXCL1),which was positively correlated with liver-infiltrating PMN-MDSC levels in CCRK transgenic ***,CRC liver metastasis patients exhibited hyperaaivation of hepatic CCRK/NF-κB/CXCL1 signaling,which was associated with accumulation of PMN-MDSCs and paucity of NKT cells compared to healthy liver transplantation *** summary,this study demonstrates that immunosuppressive reprogramming by hepatic CCRK signaling undermines antimetastatic *** findings offer new mechanistic insights and therapeutic targets for liver metastasis intervention.

关键词： Cell cycle related kinase liver metastasis liver immune microenvironment myeloid-derived suppressor cell natural killer T cell

Regulation of cytohesins by their interactors in the nervous system

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Neural Regeneration Research 2023年第10期18卷 2186-2187页

作者： Yuqi Zhai king To Leung Kwok-Fai lau School of Life Sciences Faculty of ScienceThe Chinese University of Hong KongHong Kong Special Administrative RegionChina

Adenosine diphosphate ribosylation factors(ARFs) are small GTP-binding proteins of the Ras superfamily which are involved in membrane trafficking and actin cytoskeleton *** other small GTPases,their functions are attributed to the cycling of ARF between GTP(active) and GDP (inactive) states through the actions of guanine nucleotide exchange factors (GEFs) and GTPase-activating proteins,respectively.

关键词： Adenosine cycling attributed

Acupuncture improves cognitive function A systematic review

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Neural Regeneration Research 2013年第18期8卷 1673-1684页

作者： Mason Chin Pang Leung Ka Keung Yip Chung Tsung Lam Ka Shun Lam Wai lau Wing Lam Yu Amethyst king Man Leung Kwok-fai So Department of Rehabilitation Sciences the Hong Kong Polytechnic University Cambridge Regional College Department of Anatomy and the State Key Laboratory of Brain and Cognitive Science the University of Hong Kong Pokfulam Hong Kong Special Administrative Region China GHM Institute of CNS Regeneration Jinan University

BACKGROUND： Acupuncture has been used as a treatment for cognitive impairment. OBJECTIVE： This review assesses clinical evidence for or against acupuncture as a treatment for cognitive impairment. This review also discusses the proposed mechanism（s） that could link acupuncture to improved cognitive function. METHODS： We searched the literature using PolyUone search from its inception to January 2013, with full text available and language limited to English. Levels of evidence were examined using Oxford Centre for Evidence-based Medicine-Levels of Evidence （March, 2009）. RESULTS： Twelve studies met the inclusion criteria： 3 human studies and 9 animal studies. Levels of evidence ranged from level lb to level 5. CONCLUSION： Most animal studies demonstrated a positive effect of acupuncture on cognitive impairment. However, the results of human studies were inconsistent. Further high-quality human studies with greater statistical power are needed to determine the effectiveness of acupuncture and an optimal protocol.

关键词： neural regeneration dementia acupuncture electroacupuncture learning cognitive cognition memory neuroregeneration

Fe65-engineered neuronal exosomes encapsulating corynoxine-B ameliorate cognition and pathology of Alzheimer’s disease

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Signal Transduction and Targeted Therapy 2023年第11期8卷 5481-5494页

作者： Ashok Iyaswamy Abhimanyu Thakur Xin-Jie Guan Senthilkumar Krishnamoorthi Tsz Yan Fung Kejia Lu Isha Gaurav Zhijun Yang Cheng-Fu Su Kwok-Fai lau Kui Zhang Roy Chun-Laam Ng Qizhou Lian king-Ho Cheung Keqiang Ye Huanhuan Joyce Chen Min Li Mr.&Mrs.Ko Chi-Ming Centre for Parkinson’s Disease Research School of Chinese MedicineHong Kong Baptist UniversityHong Kong SARChina Pritzker School of Molecular Engineering The University of ChicagoChicagoILUSA Ben May Department for Cancer Research The University of ChicagoChicagoILUSA School of Chinese Medicine Hong Kong Baptist UniversityHong Kong SARChina School of Life Sciences The Chinese University of Hong KongHong Kong SARChina Division of Neuroscience School of Biological SciencesFaculty of BiologyMedicine and HealthManchester Academic Health Science CentreUniversity of ManchesterManchesterUnited Kingdom Department of Medicine Li Ka Shing Faculty of MedicineThe University of Hong KongPok Fu LamHong Kong SARChina Prenatal Diagnostic Center and Cord Blood Bank Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangzhouChina HKUMed Laboratory of Cellular Therapeutics the University of Hong KongPok Fu LamHong Kong SARChina Faculty of Life and Health Sciences Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhenChina

Alzheimer’s disease(AD)is a neurodegenerative disorder characterized by the predominant impairment of neurons in the hippocampus and the formation of amyloid plaques,hyperphosphorylated tau protein,and neurofibrillary tangles in the *** overexpression of amyloid-βprecursor protein(APP)in an AD brain results in the binding of APP intracellular domain(AICD)to Fe65 protein via the C-terminal Fe65-PTB2 interaction,which then triggers the secretion of amyloid-βand the consequent pathogenesis of ***,targeting the interaction between APP and Fe65 can offer a promising therapeutic approach for ***,exosome,a type of extracellular vesicle with diameter around 30–200 nm,has gained much attention as a potential delivery tool for brain diseases,including AD,due to their ability to cross the blood–brain barrier,their efficient uptake by autologous cells,and their ability to be surface-modified with target-specific receptor ***,the engineering of hippocampus neuron cell-derived exosomes to overexpress Fe65,enabled the development of a novel exosome-based targeted drug delivery system,which carried Corynoxine-B(Cory-B,an autophagy inducer)to the APP overexpressed-neuron cells in the brain of AD *** Fe65-engineered HT22 hippocampus neuron cell-derived exosomes(Fe65-EXO)loaded with Cory-B(Fe65-EXO-Cory-B)hijacked the signaling and blocked the natural interaction between Fe65 and APP,enabling APP-targeted delivery of ***,Fe65-EXO-Cory-B induced autophagy in APP-expressing neuronal cells,leading to amelioration of the cognitive decline and pathogenesis in AD mice,demonstrating the potential of Fe65-EXO-Cory-B as an effective therapeutic intervention for AD.

关键词： Alzheimer gained loaded