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Geo-environmental properties and microstructural characteristics of sustainable limestone calcined clay cement(LC3)binder treated Zn-contaminated soils

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Journal of Zhejiang university-Science A(Applied Physics & Engineering) 2023年第10期24卷 898-911页

作者： Haoliang WU Heng SONG Xinpo sun Yuzhang BI Shenjing FU Ning YANG Guangdong Key Laboratory of Marine Civil Engineering School of Civil EngineeringSun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China College of Civil Engineering Sichuan University of Science&EngineeringZigong 643002China School of Transportation Southeast UniversityNanjing 210096China

Limestone calcined clay cement(LC3)is an environment-friendly and sustainable cementitious *** has recently gained considerable attention for the stabilization/solidification(S/S)of soils contaminated by heavy ***,the existing studies on S/S of Zn-contaminated soils using LC3 in terms of hydraulic conductivity and microstructural properties as compared to ordinary Portland cement(OPC)are *** study focuses on the evaluation of the mechanical,leaching,and microstructural characteristics of Zn-contaminated soils treated with different contents(0%,4%,6%,8%,and 10%)of low-carbon *** engineering performance of the treated Zn-contaminated soils is assessed over time using unconfined compressive strength(UCS),hydraulic conductivity(k),toxicity characteristic leaching procedure(TCLP),and synthetic precipitation leaching procedure(SPLP)*** results show that the UCS of Zn-contaminated soils treated with LC3 ranged from 1.47 to 2.49 MPa,which is higher than 1.63%–13.07%for those treated with *** k of Zn-contaminated soils treated with LC3 ranged from 1.16×10^(−8)to 5.18×10^(−8)cm/s as compared to the OPC treated *** the leaching properties,the leached Zn from TCLP and SPLP is 1.58–321.10 mg/L and 0.52–284.65 mg/L as the LC3 contents ranged from 4%to 10%.Further,the corresponding pH modeling results indicate that LC3 promotes a relatively suitable dynamic equilibrium condition to immobilize the higher-level Zn *** addition,microscopic analyses demonstrate that the formations of hydration products,i.e.,Zn(OH)_(2),Zn_(2)SiO_(4),calcium silicate hydrate(C–S–H),calcium silicate aluminate hydrate(C–A–S–H)gel,ettringite,and CaZn(SiO_(4))(H_(2)O),are the primary mechanisms for the immobilization of *** study also provides an empirical formula between the UCS and k to support the application of LC3-solidified Zn-contaminated soils in practical engineering in the field.

关键词： Limestone calcined clay cement(LC3) Stabilization/solidification(S/S) Zn-contaminated soils Microstructural characteristics

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Platinum-Induced Pseudo-Zn-Air Reaction Massively Increases the Electrochemical Capacity of Aqueous Zn/V_(5)O_(12)·6H_(2)O Batteries

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Energy & Environmental Materials 2021年第4期4卷 596-602页

作者： Gongzheng Yang Chengxin Wang State Key Laboratory of Optoelectronic Materials and Technologies School of Materials Science and EngineeringSun Yat-sen(Zhongshan)UniversityGuangzhou 510275China The Key Laboratory of Low-carbon Chemistry&Energy Conservation of Guangdong Province Sun Yat-sen(Zhongshan)UniversityGuangzhou 510275China

How to effectively improve Zn^(2+)-storage properties is now becoming an urgent issue in the development of high-energy-density aqueous zinc-ion ***,a new method is proposed to massively increase the electrochemical capacity of aqueous Zn/V_(5)O_(12)·6H_(2)*** adding a small amount of platinum(Pt,1.5 wt.%)and keeping other factors constant,the V_(5)O_(12)·6H_(2)O-Pt electrodes deliver a much higher specific capacity(440 m Ah g^(-1)at 500 m A g^(-1))than do V_(5)O_(12)·6H_(2)Oelectrodes(270 m Ah g^(-1)at500 m A g^(-1)).The structural and morphological evolution of V_(5)O_(12)·6H_(2)Oduring cycling results in Zn^(2+)ion insertion/extraction and the formation/disappearance of the zinc hydroxyl complex(Zn_(4)SO_(4)(OH)_(6)·5H_(2)O,ZHS),where the latter is closely related to the surface redox reaction,promoting Zn^(2+)ion stripping/plating on the Zn anode and consequently leading to extra electron *** tests in the absence of oxygen reveal that the Pt additive has no contribution and is even counterproductive to electric conductivity but favors remarkable enhancement of the ***,it is apparent that a strong causal relationship exists between Pt and the *** consideration of the catalytic application for oxygen reduction,Pt is expected to play a vital role in enhancing the electrochemical capacity through the pseudo-Zn-air *** finding introduces a new strategy for achieving high-performance aqueous zinc-ion batteries.

关键词： cathode platinum pseudo-Zn-air reaction V_(5)O_(12)·6H_(2)O Zinc-ion battery

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Tumor-on-a-chip:from bioinspired design to biomedical application

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Microsystems & Nanoengineering 2021年第3期7卷 27-49页

作者： Xingxing Liu Jiaru Fang Shuang Huang Xiaoxue Wu Xi Xie Ji Wang Fanmao Liu Meng Zhang Zhenwei Peng Ning Hu The First Affiliated Hospital of sun yat-sen university State Key Laboratory of Optoelectr onic Materials and TechnologiesGuangdong Province Key Laboratory of Display Material and TechnologySchool of Electronics and Information TechnologySun Yat-Sen University510006 GuangzhouChina State Key Laboratory of Transducer Technology Chinese Academy of Sciences200050 ShanghaiChina

Cancer is one of the leading causes of human death,despite enormous efforts to explore cancer biology and develop anticancer *** main challenges in cancer research are establishing an efficient tumor microenvironment in vitro and exploring efficient means for screening anticancer drugs to reveal the nature of cancer and develop *** tumor microenvironment possesses human-specific biophysical and biochemical factors that are difficult to recapitulate in conventional in vitro planar cell models and in vivo animal ***,model limitations have hindered the translation of basic research findings to clinical *** this review,we introduce the recent progress in tumor-on-a-chip devices for cancer biology research,medicine assessment,and biomedical applications in *** emerging tumor-on-a-chip platforms integrating 3D cell culture,microfluidic tech no logy,and tissue engineeri ng have successfully mimicked the pivotal structural and functional characteristics of the in vivo tumor *** recent advances in tumor-on-a-chip platforms for cancer biology studies and biomedical applications are detailed and an a lyzed in this *** review should be valuable for further understanding the mechanisms of the tumor evolution process,screening anticancer drugs,and developing cancer therapies,and it addresses the challenges and potential opportunities in predicting drug screening and cancer treatment.

关键词： drugs integrating establishing

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Countering JPEG anti-forensics based on noise level estimation

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Science China(Information Sciences) 2018年第3期61卷 29-42页

作者： Hui ZENG Jingjing YU Xiangui KANG Siwei LYU Guangdong Key Laboratory of Information Security School of Data and Computer ScienceSun Yat-sen University Department of Computer Science University at Albany

Quantization artifact and blocking artifact are the two types of well-known fingerprints of JPEG compression. Most JPEG forensic techniques are focused on these fingerprints. However, recent research shows that these fingerprints can be intentionally concealed via anti-forensics, which in turn makes current JPEG forensic methods vulnerable. A typical JPEG anti-forensic method is adding anti-forensic dither to DCT transform coefficients and erasing blocking artifact to remove the trace of compression history. To deal with this challenge in JPEG forensics, in this paper, we propose a novel countering method based on the noise level estimation to identify the uncompressed images from those forged ones. The experimental results show that the proposed method achieves superior performance on several image databases with only one-dimensional feature. It is also worth emphasizing that the proposed threshold-based method has explicit physical meaning and is simple to be implemented in practice. Moreover, we analyze the strategies available to the investigator and the forger in the case of that they are aware of the existence of each other. Game theory is used to evaluate the ultimate performance when both sides adopt their Nash equilibrium strategies.

关键词： game theory quantization artifact blocking artifact JPEG forensics anti-forensics noise level estimation

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Cardiomyocyte electrical-mechanical synchronized model for high-content, dose-quantitative and time-dependent drug assessment

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Microsystems & Nanoengineering 2021年第2期7卷 131-142页

作者： Jiaru Fang Xinwei Wei Hongbo Li Ning Hu Xingxing Liu Dongxin Xu Tao Zhang Hao Wan Ping Wang Xi Xie The First Affiliated Hospital of sun yat-sen university School of Electronics and Information TechnologyGuangdong Province Key Laboratory of Display Material and TechnologySun Yat-sen UniversityGuangzhou510006China Biosensor National special Laboratory Key Laboratory of Biomedical Engineering of Ministry of EducationDepartment of Biomedical EngineeringZhejiang UniversityHangzhou310027China State Key Laboratory of Transducer Technology Chinese Academy of SciencesShanghai200050China School of Biomedical Engineering Sun Yat-sen UniversityGuangzhou510006China

Cardiovascular diseases have emerged as a significant threat to human ***,drug development is a time-consuming and costly process,and few drugs pass the preclinical assessment of safety and *** existing patch-clamp,Ca2+imaging,and microelectrode array technologies in cardiomyocyte models for drug preclinical screening have suffered from issues of low throughput,limited long-term assessment,or inability to synchronously and correlatively analyze electrical and mechanical ***,we develop a high-content,dose-quantitative and time-dependent drug assessment platform based on an electrical-mechanical synchronized(EMS)biosensing *** microfabricated EMS can record both firing potential(FP)and mechanical beating(MB)signals from cardiomyocytes and extract a variety of characteristic parameters from these two signals(FP–MB)for further *** system was applied to test typical ion channel drugs(lidocaine and isradipine),and the dynamic responses of cardiomyocytes to the tested drugs were recorded and *** high-throughput characteristics of the system can facilitate simultaneous experiments on a large number of ***,a database of various cardiac drugs can be established by heat map analysis for rapid and effective screening of *** EMS biosensing system is highly promising as a powerful tool for the preclinical development of new medicines.

关键词： electrical consuming patch

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Recognition of high-specificity hERG K+ channel inhibitor-induced arrhythmia in cardiomyocytes by automated template matching

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Microsystems & Nanoengineering 2021年第2期7卷 107-119页

作者： Hao Wang Hongbo Li Xinwei Wei Tao Zhang Yuting Xiang Jiaru Fang Peiran Wu Xi Xie Ping Wang Ning Hu The First Affiliated Hospital of sun yat-sen university School of Electronics and Information TechnologyState Key Laboratory of Optoelectronic Materials and TechnologiesGuangdong Province Key Laboratory of Display Material and TechnologySun Yat-sen UniversityGuangzhou510006China Biosensor National special Laboratory Key Laboratory of Biomedical Engineering of Ministry of EducationDepartment of Biomedical EngineeringZhejiang UniversityHangzhou310027China The Sixth Affiliated Hospital of sun yat-sen university Guangzhou510655China State Key Laboratory of Transducer Technology Chinese Academy of SciencesShanghai200050China

Cardiovascular disease(CVD)is the number one cause of death in *** induced by gene mutations,heart disease,or hERG K+channel inhibitors is a serious CVD that can lead to sudden death or heart *** cardiomyocyte-based biosensors can record extracellular potentials and mechanical beating ***,parameter extraction and examination by the naked eye are the traditional methods for analyzing arrhythmic beats,and it is difficult to achieve automated and efficient arrhythmic recognition with these *** this work,we developed a unique automated template matching(ATM)cardiomyocyte beating model to achieve arrhythmic recognition at the single beat level with an interdigitated electrode impedance detection *** ATM model was established based on a rhythmic template with a data length that was dynamically adjusted to match the data length of the target beat by spline *** performance of the ATM model under long-term astemizole,droperidol,and sertindole treatment at different doses was *** results indicated that the ATM model based on a random rhythmic template of a signal segment obtained after astemizole treatment presented a higher recognition accuracy(100%for astemizole treatment and 99.14%for droperidol and sertindole treatment)than the ATM model based on arrhythmic *** believe this highly specific ATM method based on a cardiomyocyte beating model has the potential to be used for arrhythmia screening in the fields of cardiology and pharmacology.

关键词： channel template matching

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New coryphoid fossil palm leaves (Arecaceae:Coryphoideae) from the Eocene Changchang Basin of Hainan Island,South China

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Science China Earth Sciences 2013年第9期56卷 1493-1501页

作者： ZHOU WenJun LIU XiaoYan XU QingQing HUANG KangYou JIN JianHua State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources School of Life SciencesSun Yat-sen University State Key Laboratory of Palaeobiology and Stratigraphy(Nanjing Institute of Geology and Palaeontology CAS) Department of Earth Sciences Sun Yat-sen University

Modern palms are diverse and widespread in the tropics and subtropics,especially the tropical ***,most fossil palm records have been reported from regions of relatively higher *** this paper seven species of coryphoid palm from the Eocene Changchang Basin of Hainan Island of South China are *** are Sabalites asymmetricus ***.,*** ***.,*** ***.,*** Guo,*** Guo,Livistona sp.,and Amesoneuron *** to leaf morphological characteristics,they can be classified as members of the subfamily *** extant flora of Hainan Island,only three species of Livistona have costapalmate *** palm fossils indicate that,during the Eocene,flora in Hainan Island included a diversity of coryphoid palms,which have some bearings on the reconstruction of the palaeoclimate of South China.

关键词： New coryphoid fossil palm leaves (Arecaceae:Coryphoideae) from the Eocene Changchang Basin of Hainan Island South China

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Comprehensiveness and Locality: Website Marketing of World City Governments in the Era of Globalisation

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Chinese Geographical Science 2019年第1期29卷 86-99页

作者： XUE Desheng LIU Huaikuan GUO Wenjiong LIU Ye School of Geography and Planning Sun Yat-sen University Collaboration and Innovation Center of Coordinating Urban and Rural in Shanxi Province Taiyuan Normal University

In the era of the Internet and globalisation, more and more international academics focus their attention on how city governments compete for talent, capital, and technology through website marketing to promote their economy and global status. However, 1) present research generally overlooks the importance of different types of elements in different marketing themes, 2) the combinations of marketing themes are still unknown, and 3) the presumption that the emphasised elements and specific combination of marketing themes on official websites differentiates cities requires more cases to be understood. In light of this background, this study collects homepage elements of 49 Alpha world cities' official websites and quantitatively analyses the frequency of different types of elements, the marketing content themes, and the dissimilarity of content of Chinese Alpha world cities. The results indicate that comprehensiveness and locality appear in the process of city marketing throughout official city websites. Overall, we make the following conclusions. 1) The importance of different kinds of elements significantly differs between 49 Alpha world cities. 2) Based on various combinations of elements, the marketing contents of Alpha world cities through official websites can be categorised into six themes of history and culture, government and information, construction and environment, government and living, construction and living, and general compound. 3) The marketing elements of five Chinese Alpha world cities, including Hong Kong, Beijing, Shanghai, Taipei and Guangzhou, are different than the other 44 Alpha world cities, and Chinese cities prefer to advertise their history and culture but rarely market citizens' activities. Moreover, Chinese cities' marketing mostly targets natives while the other 44 Alpha cities target external groups, and the locality of world cities' website marketing is reinforced especially on a native language edition website. This study ultimately

关键词： website marketing globalisation marketing content comprehensiveness locality

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First record of extinct fruit genus Chaneya in low-latitude tropic of South China

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Science China Earth Sciences 2012年第5期55卷 728-732页

作者： FENG XinXin JIN JianHua State Key Laboratory of Biocontrol Guangdong Key Laboratory of Plant Resources and School of Life SciencesSun Yat-sen UniversityGuangzhou 510275China

Fossil reproductive structure from the Eocene of the Changchang Basin (Hainan Island,South China) is recognized as Chaneya hainanensis *** new species is characterized by persistent corolla of five obovate petals with three subparallel primary venation linked by arching secondary veins,circular central disk bearing two orbicular ovaries or fruit *** discovery confirms the presence of the extinct fruit genus Chaneya in low-latitude tropical area,providing significant fossil evidence for investigating the origin,migration,and phytogeography of this genus and discussing the Tertiary floristic exchanges among North America,eastern Asia,and *** the distribution of this genus and its extant relatives and the climate changes during the Cenozoic,we hypothesize that Chaneya was a widespread tropical or subtropical taxon,but,with climate cooling,became extinct in northern latitudes and evolved into Picrasma (Simaroubaceae) and Rutaceae mainly in modern tropics and subtropics.

关键词： Chaneya Eocene low-latitude tropic Changchang Basin South China

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Axon guidance factor netrin-1 and its receptors regulate angiogenesis after cerebral ischemia

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Neuroscience Bulletin 2014年第4期30卷 683-691页

作者： Qiao Ding Song-Jie Liao Jian Yu Department of Neurology Guangdong Key Laboratory for Diagnosis and Treatment of Major Neurological DiseasesNational Key Clinical DepartmentNational Key Disciplinethe First Affiliated Hospital of Sun Yat-Sen University

Neurogenesis and angiogenesis play important roles in functional recovery after ischemic stroke. When cerebral ischemia occurs, axon regeneration can compensate for the loss of apoptotic neurons in the ischemic area. The formation of new blood vessels ameliorates the local decrease in blood supply, enhancing the supply of oxygen and nutrients to newly-formed neurons. New blood vessels also act as a scaffold for the migration of neuroblasts to the infarct area after ischemic stroke. In light of this, researchers have been actively searching for methods to treat cerebral infarction. Netrins were first identified as a family of proteins that mediate axon guidance and direct axon migration during embryogenesis. Later studies have revealed other functions of this protein family. In this review, we focus on netrin-1, which has been shown to be involved in axon migration and angiogenesis, which are required for recovery after cerebral ischemia. Thus, therapies targeting netrin-1 may be useful for the treatment of ischemic stroke.

关键词： netrin-1 angiogenesis cerebral ischemia neuronal recovery

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