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Science China Chemistry 2011年第11期54卷 1702-1710页

作者： CHEN MiaoJuan QU deZhong CHI WeiLin WANG Wei rEN XiaoShuai CONG ShuJie LIANG PeiZhou FENG ShiPeng ZHANG BiLiang Lab of rNA Chemical Biology Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences. Guangzhou 510530 China State Key Laboratory of respiratory diseases Guangzhou Institute of respiratory diseases Guangzhou 510182 China Graduate University of Chinese Academy of Sciences Beijing 100049 China University of Science and Technology of China School of Life Sciences Hefei 230026 China Guangzhou riboBio Co. Ltd. Guangzhou Science Park Guangzhou 510663 China

Labelling and identification of proliferating cells is important for the study of physiological or pathological processes in high-content screening (HCS) assays. Here we describe ethynyl deoxyuridine (EdU) as a biomarker for the assessment of cell proliferation and clearly demonstrate the feasibility of the EdU-labelling method for use in HCS assays. EdU detection is highly robust, reproducible, technically simple, and well suited for automated segmentation, which provides an excellent al- ternative for setting up multiplexed HCS assays of sirNA, mirNA and small-molecule libraries.

关键词： molecular probe sirNA mirNA "click" chemistry

Simultaneous red-green-blue electroluminescent enhancement directed by surface plasmonic ＂far-field＂ of facile gold nanospheres

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Nano research 2018年第1期11卷 151-162页

作者： Xiaoyan Wu Yiqi Zhuang Zhongtao Feng Xuehong Zhou Yuzhao Yang Linlin Liu Zengqi Xie Xudong Chen Yuguang Ma Institute of Polymer Optoelectronic Materials and devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou S 10640 China Key Laboratory for Polymer Composite and Functional Material of Ministry of China Sun Yat-sen University Guangzhou 510275 China Institute of Fluid Physics China Academy of Engineering Physics Mianyang 621900 China

Based on the ＂far-field＂ effect of surface plasma resonance, simultaneous red-green-blue electroluminescence enhancement by facile synthesized gold nanospheres were realized in this work, which would be difficult and complex to attain using wavelength-selected localized surface plasma resonance. The plasmonic ＂far-field＂ effect can simultaneously enhance the whole emission region in the white light range, because the enhancing regions from blue to red emission are largely overlapped. By doping gold nanospheres embedded in a poly（3,4-ethylene dioxythiophene）：polystyrene sulfonic acid （PEdOT：PSS） layer, yield enhancement is achieved in more than 95% devices with the best enhancing ratio of 60% and the commission International de UEclairage （CIE） coordinate is stable at approximately （0.33, 0.36）. The plasmonic ＂far-field＂ effect requires an ultra-low working concentration of Au NPs in picomolar magnitude, and shows little negative effect on the electronic process and light scattering, which has big potential in realizing highly efficient white organic light emitting diodes.

关键词： gold nanoparticles(Au NPs) "far-field" effect surface plasma resonance white organic lightemitting diodes

Multiple anti-counterfeiting strategy by integrating up-conversion,down-shifting luminescence, phosphorescence and photochromism into Na YTiO4: Bi/Er phosphors

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Journal of Materials Science & Technology 2022年第35期130卷 219-226页

作者： Yuzhen Wang Xuanyi Yuan Yongge Cao Chaoyang Ma Songshan Lake Materials Laboratory Dongguan 523808China department of Physics Renmin University of ChinaBeijing 100872China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China

With the rapid development of science and technology,the high-security-level anti-counterfeiting technique is essential for ensuring property or information *** this work,we prepared micron NaYTiO_(4):Bi/Er(NYT:Bi/Er) phosphors with integrating up-conversion(UC) photoluminescence,downshifting(dS) emission,phosphorescence and photochromism(PC) performances for advanced multiple anti-counterfeiting *** to the abundant energy levels of Er^(3+)ions,the UC and dS luminescence behaviors are ***,the yellow-green emission of Er^(3+)ions can be observed upon 980 nm excitation,and the bright green emission is demonstrated under 281 or 254 nm excitation due to the energy transitions of Er^(3+)ions and the energy transfer process from Bi^(3+)to Er^(3+)***,the introduction of Bi^(3+)ions generates defect levels in the matrix and thus leads to ***,the repeatable PC performance could be triggered by the 365 nm irradiation and vanished with 450 nm illumination or thermal *** verify the practical usability of NYT:Bi/Er phosphors on anti-counterfeiting applications,some experiments are designed and successfully *** is believed that the NYT:Bi/Er phosphors can be a promising candidate for high-security-level multiple anti-counterfeiting.

关键词： Anti-counterfeiting Up-conversion down shifting Phosphorescence Photochromism NaYTiO4 Bi/Er

Nb-doped PrBa_(0.8)Ca_(0.2)Co_(2)O_(6)-based perovskite cathode with improved oxygen reduction reaction activity and stability for solid oxide fuel cells

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Journal of Advanced Ceramics 2024年第10期13卷 1590-1599页

作者： depeng Zeng Feng Zhu Kang Xu Hua Zhang Yangsen Xu Yu Chen School of Environment and Energy South China University of TechnologyGuangzhou 510006China

The performance of a solid oxide fuel cell(SOFC)is strongly associated with the activity and durability of the cathode,where the oxygen reduction reaction *** this study,we report our findings in the development of an Nb-doped PrBa_(0.8)Ca_(0.2)Co_(2)O_(6-δ)(PrBa_(0.8)Ca_(0.2)Co_(2-x)Nb_(x)O_(6-δ),x=0,0.025,0.05,and 0.1,denoted as PBCCNx)perovskite composite as the SOFC *** of X-ray diffraction(Xrd)patterns and energy-dispersive transmission electron microscopy(TEM-EdS)images suggest that after being treated at 950℃ in air,PBCCN0.05 mainly contains phases of Ca-and Nb-doped PrBaCo2O6-δdouble perovskite,PrCoO_(3) perovskite with Ca and Nb doping,and Ba_(3)Ca_(1.18)Nb_(1.82)O_(9-δ).When evaluated as an SOFC cathode,the PBCCN0.05 mixture has shown a low polarization resistance of 0.0074Ω·cm^(2)at 800℃ in La_(0.8)Sr0.2Ga_(0.8)Mg_(0.2)O_(3)electrolyte symmetrical ***,anode-supported single cells with a configuration of Ni-Zr_(0.84)Y_(0.16)O_(2-δ)(YSZ)/YSZ/Gd_(0.1)Ce0.9O_(2-δ)/PBCCN0.05 display high electrochemical performance,with a peak power density of 1.81 W·cm^(-2)and a reasonable durability of 100 h at 800℃.PBCCN_(0.05)possesses a higher concentration of oxygen vacancies,a faster oxygen surface adsorption-dissociation rate,and an increased mass ratio of PrCoO_(3) perovskite with Ca and Nb doping compared to PrBa_(0.8)Ca_(0.2)Co_(2)O_(6)-δwithout Nb doping.

关键词： self-assembly Nb doping cathodes oxygen reduction reactions solid oxide fuel cells(SOFCs)

dual-reaction-center catalytic process continues Fenton's story

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Frontiers of Environmental Science & Engineering 2020年第5期14卷 65-73页

作者： Chao Lu Kanglan deng Chun Hu Lai Lyu Institute of Environmental research at Greater Bay Area Key Laboratory for Water Quality and Conservation of the Pearl River Delta(Ministry of Education)Guangzhou UniversityGuangzhou 510006China

Triggered by global water quality safety issues,the research on wastewater treatment and water purification technology has been greatly developed in recent *** Fenton technology is particularly powerful due to the rapid attack on pollutants by the generated hydroxyl radicals(·OH).However,both heterogeneous and homogeneous Fenton/Fenton-like technologies follow the classical reaction mechanism,which depends on the oxidation and reduction of the transition metal ions at single *** even after a century of development,this reaction still suffers from its inherent bottlenecks in practical *** recent years,our group has been focusing on studying a novel heterogeneous Fenton catalytic process,and we developed the dual-reaction-center(drC)system for the first *** the drC system,H2O2 and O2 can be efficiently reduced to reactive oxygen species(rOS)in electron-rich centers,while pollutants are captured and oxidized by the electron-deficient *** obtained electrons from pollutants are diverted to the electron-rich centers through bonding *** process breaks through the classic Fenton mechanism,and improves the performance and efficiency of pollutant removal in a wide pH ***,we provide a brief overview of Fenton's story and focus on combing the discovery and development of the drC technology and mechanism in recent *** construction of the drC and its performance in the pollutant degradation and interfacial reaction process are described in *** look forward to bringing a new perspective to continue Fenton's story through research and development of drC technology.

关键词： dual reaction centers Fenton Pollutant utilization Electron transfer

Enhanced Fenton-like process over Cu/L(+)-ascorbic acid co-doping mesoporous silica for toxicity reduction of emerging contaminants

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Frontiers of Environmental Science & Engineering 2024年第4期18卷 49-60页

作者： Yuhang Liu Wenxuan deng Xiaojun Wu Chun Hu Lai Lyu Key Laboratory for Water Quality and Conservation of the Pearl river delta(Ministry of Education) Institute of Environmental Research at Greater BayGuangzhou UniversityGuangzhou 510006China

Effective removal of emerging contaminants(ECs)to minimize their impacts on human health and the natural environment is a global *** the removal of ECs in water,we fabricated a seaweed spherical microsphere catalyst with Cu cation-πstructures by in situ doping of Cu species and ascorbic acid in mesoporous silica(Cu-C-MSNs)via a hydrothermal *** results indicate that bisphenol A(BPA)is substantially degraded within 5 min under natural conditions,with its biological toxicity considerably ***,industrial wastewater could also be effectively purified by Cu-C-MSNs/H_(2)O_(2) *** presence of metal sites and the complexation of ECs via cation-πinteraction andπ-πstacking on the catalyst surface were directly responsible for the polarization distribution of electrons,thus activating H_(2)O_(2) and dissolved oxygen(dO).The removal of contaminants could be attributed primarily to 1)the activation of H_(2)O_(2) into ^(·)OH to attack the contaminants and 2)self-cleavage because of the transfer of electrons from the contaminants to the *** study provides an innovative solution for the effective treatment of ECs and has positive implications for easing global environmental crises.

关键词： Cation-πstructures Polarization electric field Fenton-like process Contaminants cleavage

Telomere regulation in pluripotent stem cells

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Protein & Cell 2014年第3期5卷 194-202页

作者： Yan Huang Puping Liang dan Liu Junjiu Huang Zhou Songyang Key Laboratory of reproductive Medicine of guangdong province the First Affiliated Hospital and Key Laboratory of Gene_ Engineering of the Ministry of Education School of Life Sciences Sun Yat-sen University Guangzhou 510275 China Cell-Based Assay Screening Core Baylor College of Medicine One Baylor Plaza Houston TX 77030 USA dan L. duncan Cancer Center Baylor'College of Medicine one Baylor'Plaza Houston TX 77030 uSA Verna and Marrs Mclean department of Biochemistry and Molecular Biology Baylor College of Medicine One Baylor Plaza Houston TX 77030 USA

Pluripotent stem cells （PSCs） have the potential to pro- duce any types of cells from all three basic germ layers and the capacity to self-renew and proliferate indefinitely in vitro. The two main types of PSCs, embryonic stem cells （ESCs） and induced pluripotent stem cells （iPSCs）, share common features such as colony morphology, high expression of Oct4 and Nanog, and strong alkaline phosphatase activity. In recent years, increasing evi- dences suggest that telomere length represents another important internal factor in maintaining stem cell pluri- potency. Telomere length homeostasis and its structural integrity help to protect chromosome ends from recom- bination, end fusion, and dNA damage responses, ensuring the divisional ability of mammalian cells. PSCs generally exhibit high telomerase activity to maintain their extremely long and stable telomeres, and emerging data indicate the alternative lengthening of telomeres （ALT） pathway may play an important role in telomere functions too. Such characteristics are likely key to their abilities to differentiate into diverse cell types in v/vo. In this review, we will focus on the function and regulation of telomeres in ESCs and iPSCs, thereby shedding light on the importance of telomere length to pluripotency and the mechanisms that regulate telomeres in PSCs.

关键词： telomere pluripotent stem cells alternativelengthening of telomeres (ALT) regulators

Zn^(2+) loading as a critical contributor to the circ_0008553-mediated oxidative stress and inflammation in response to PM_(2.5) exposures

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Journal of Environmental Sciences 2023年第2期124卷 451-461页

作者： Jingzhou Wang Jianbo Jia dujia Wang Xiujiao Pan Haiyan Xiong Chengjun Li Yiguo Jiang Bing Yan Institute of Environmental research at Greater Bay Area Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006China School of Environmental Science and Engineering Shandong UniversityQingdao 266237China Institute for Chemical Carcinogenesis Guangzhou Medical UniversityGuangzhou 511436China

Inflammation is a major adverse outcome induced by inhaled particulate matter with a diameter of≤2.5μm(PM_(2.5)),and a critical trigger ofmost PM_(2.5) exposure-associated ***,the key molecular events regulating the PM_(2.5)-induced airway inflammation are yet to be *** the critical role of circular rNAs(circrNAs)in regulating inflammation,we predicted 11 circrNAs that may be involved in the PM_(2.5)-induced airway inflammation using three previously reportedmirNAs through the starBasewebsite.A novel circrNA circ_0008553 was identified to be responsible for the PM_(2.5)-activated inflammatory response in human bronchial epithelial cells(16HBE)via inducing oxidative *** a combinatorial model PM_(2.5) library,we found that the synergistic effect of the insoluble core and loaded Zn^(2+)ions at environmentally relevant concentrations was the major contributor to the upregulation of circ_0008553 and subsequent induction of oxidative stress and inflammation in response to PM2.5 *** findings provided new insight into the intervention of PM_(2.5)-induced adverse outcomes.

关键词： PM(2.5) Toxic composition Combinatorial model PM_(2.5)library Circ_0008553 Inflammation

Tailoring Excited State Properties and Energy Levels Arrangement via Subtle Structural design on d-π-A Materials

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Chinese Journal of Chemistry 2017年第10期35卷 1559-1568页

作者： Xiaoming Liang Zhiheng Wang Liangxuan Wang Muddasir Hanif dehua Hu Shijian Su Zengqi Xie Yu Gao Bing Yang Yuguang Ma Institute of Polymer Optoelectronie Materials and devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou Guangdong 510640 China State Key Laboratory of Supramolecular Structure and Materials Jilin University Changchun Jilin 130012 China

The donor-n-conjugated-acceptor （d-n-A） structure is an important design for the luminescent materials be- cause of its diversity in the selections of donor, n-bridge and acceptor groups. Herein, we demonstrate two examples of d-^-A structures capable to finely modulate the excited state properties and arrangement of energy levels, TPA-AN-BP and CZP-AN-BP, which possess the same acceptor and n-bridge but different donor. The investigation of their photophysical properties and dFT calculation revealed that the d-n-A structure with proper donor, n-bridge and acceptor can result in separation of frontier molecular orbitals on the corresponding donor and acceptor with an obvious overlap on the n-bridge, resulting in a hybridized local and charge-transfer （HLCT） excited state with high photoluminescent （PL） efficiencies. Meanwhile, their singlet and triplet states are arranged on corresponding moie- ties with large energy gap between T2 and T1, and a small energy gap between S1 and T2, which favor the reverse intersystem crossing （rISC） from high-lying triplet levels to singlet levels. As a result, the sky-blue emission non-doped OLEd based on the TPA-AN-BP reached maximum external quantum efficiency （EQE） of 4.39% and a high exciton utilization efficiency （EUE） of 77%. This study demonstrates a new strategy to construct highly effi- cient OLEd materials.

关键词： d-π-A organic light emitting diode exciton utilization hybridized local and charge-transfer reverse intersystem crossing

Newly discovered youngest UHT metamorphism on Earth,Western Sulawesi,Indonesia

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Geoscience Frontiers 2023年第2期14卷 14-26页

作者： Juiyen Hsia Jian Zhang Guochun Zhao Jiahui Qian Jin Liu Min Sun Changqing Yin Peng Gao Welson Weisheng Xian Minjie Guo School of Earth Sciences and Engineering Sun Yat-sen UniversityGuangzhouChina Southern Marine Science and Engineering guangdong Laboratory(Zhuhai) ZhuhaiChina department of Earth Sciences University of Hong KongPokfulam RoadHong KongChina College of Earth Sciences Jilin UniversityChangchunChina Pt.Enersteel Jl.Pejaten Barat II No.20 Kav.CSouth Jakarta 12510Indonesia

Ultrahigh-temperature(UHT)metamorphism represents an extreme crustal thermal event with peak conditions exceeding 900C at 7–13 *** the modern-style plate tectonic system,records of the UHT metamorphism are relatively rare due to the secular cooling of *** the Palu region of Western Sulawesi,we newly discovered a series of HT-UHT metamorphic rocks including amphibolite,granulite,eclogites and *** them,two granulite samples(18CS14-2,18CS14-4)with high garnet content(>50 mol%)are chosen for petrographic observation,phase equilibrium modelling,and zircon U-Pb *** rocks are characterized by a relic M1 assemblage of Grt+Ky+Bt+rt and a M2 assemblage of Grt+Sil+Pl+Spl+Crd±Qtz+Ilm+*** equilibrium modelling based on effective bulk compositions yields UHT conditions of 7.2–8.5 kbar/940–1080C(18CS14-2)and 7.0–7.3 kbar/1000–1040C(18CS14-4).U-Pb analysis reveals two generations of metamorphic zircon with evolving rEE content that is intimately related to garnet growth and *** age of 36–5.3 Ma is ascribed to syn-to post-M1 metamorphism,whereas the young zircon age of 5.1–3.8 Ma is linked to syn-and post-M2 *** UHT metamorphism was probably the consequence of the upwelling of asthenospheric mantle triggered by post-collisional delamination of lithosphere in the MiocenePliocene(ca.5 Ma).It could represent the youngest known UHT metamorphism on Earth.

关键词： UHT metamorphism Granulite Sulawesi Indonesia Lithosphere delaimination