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Color-tunable Gd-Zn-Cu-ln-S/ZnS quantum dots for dual modality magnetic resonance and fluorescence imaging

Nano Research 2014年第11期7卷 1581-1591页

作者： Weisheng Guo Weitao Yang Yu Wang Xiaolian Sun Zhongyun Liu Bingbo Zhang Jin Chang Xiaoyuan Chen Institute of Nanobiotechnology School of Materials Science and Engineering Tianjin University and Tianjin Key Laboratory of Composites and Functional Materials Tianjin 300072 China Laboratory of Molecular Imaging and Nanomedicine National Institute of 8iomedical Imaging and Bioengineering National Institutes of Health Bethesda MD 20892 USA Shanghai East Hospital The Institute for 8iomedical Engineering & Nano Science Tongji University School of Medicine Shanghai 200120 China Jiangsu Key Laboratory of Molecular Imaging and Functional Imaging Department of Radiology Zhongda Hospital Medical School of Southeast University Nanjing 210009 China

Inorganic nanoparticles have been introduced into biological systems as useful probes for in vitro diagnosis and in vivo imaging, due to their relatively small size and exceptional physical and chemical properties. A new kind of color- tunable Gd-Zn-Cu-In-S/ZnS （GZCIS/ZnS） quantum dots （QDs） with stable crystal structure has been successfully synthesized and utilized for magnetic resonance （MR） and fluorescence dual modality imaging. This strategy allows successful fabrication of GZCIS/ZnS QDs by incorporating Gd into ZCIS/ZnS QDs to achieve great MR enhancement without compromising the fluorescence properties of the initial ZCIS/ZnS QDs. The as-prepared GZCIS/ZnS QDs show high T1 MR contrast as well as ＂color-tunable＂ photoluminescence （PL） in the range of 550-725 nm by adjusting the Zn/Cu feeding ratio with high PL quantum yield （QY）. The GZCIS/ZnS QDs were transferred into water via a bovine serum albumin （BSA） coating strategy. The resulting Cd-free GZCIS/ZnS QDs reveal negligible cytotoxicity on both HeLa and A549 cells. Both fluorescence and MR imaging studies were successfully performed in vitro and in vivo. The results demonstrated that GZCIS/ZnS QDs could be a dual-modal contrast agent to simultaneously produce strong MR contrast enhancement as well as fluorescence emission for in vivo imaging.

关键词： CuInS2 quantum dot magnetic resonance imaging^photoluminescence rnultimodality imaging gadolinium doped

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Antinociceptive and anti-inflammatory activities of leaf extracts from Annona tomentosa ***

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Journal of Integrative Medicine 2017年第5期15卷 379-387页

作者： Lilian Uchoa Carneiro Ilna Gomes da Silva Mirian Eliza Alves de Souza Wellington da Silva Cortes Mário Geraldo de Carvalho Bruno Guimaraes Marinho Postgraduate program in Physiological sciences Institute of Biological and Health SciencesFederal Rural University of Rio de JaneiroRio de Janeiro 23890-000Brazil Laboratory of Pharmacology Department of Physiological SciencesInstitute of Biological Sciences and HealthFederal Rural University of Rio de JaneiroRio de Janeiro 23890-000Brazil Postgraduate program in Chemistry Department of ChemistryInstitute of Exact SciencesFederal Rural University of Rio de JaneiroRio de Janeiro 23890-000Brazil

OBJECTIVE：Annona tomentosa *** is a species not endemic to Brazil that belongs to the phytogeographic areas of the Amazon,Cerrado and *** known as“araticum rasteiro”or“araticum de moita”,*** is edible and tea made from the leaves has been used as an antiinflammatory by native *** is no scientific evidence for these uses of ***,especially those related to the control of pain and *** this reason,in the present study we evaluated the antinociceptive and anti-inflammatory activities of partitions from the methanolic extract of *** leaves（*** leaf methanolic extract（ATFM）in hexane partition：ATFM-H;ATFM in dichloromethane partition：ATFM-D;ATFM in ethyl acetate partition：ATFM-Ac;ATFM in butanol partition：ATFM-B）in ***：The antinociceptive effects of leaf extracts from *** were evaluated by abdominal writhing and tail-flick tests,while the anti-inflammatory effects were evaluated by paw oedema and air-pouch *** locomotor activity was evaluated with the open-field ***,we evaluated the possible action mechanism of ***,using naloxone,nitro-L-arginine methyl ester,glibenclamide,atropine,naltrindole and norbinaltorphimine in tail-flick *** productions of tumor necrosis factorα（TNF-α）and interleukin（IL）-1βwere also ***：The chromatographic fractionation of the partitions of the methanolic extract from the leaves of *** revealed the presence of diterpenes,flavonoids,and steroids *** the analysis of the hexane partition kaurenoic acid was identified as the major ***-H and ATFM-D had a significant antinociceptive effect in acute pain models in *** ATFM-H showed central antinociceptive effect from the involvement of theδopioid receptors,without causing alterations in the locomotor activity of the mice,while ATFM-D was effective in decreasing paw oedema and TNF-α and IL-1β ***：These results demon

关键词： Annona tomentosa cytokines opioid nociception

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PD-1 inhibitors monotherapy in hepatocellular carcinoma: Meta-analysis and systematic review

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Hepatobiliary & Pancreatic Diseases International 2019年第6期18卷 505-510页

作者： Ioannis A.Voutsadakis Algoma District Cancer program Sault Area Hospital Section of Internal Medicine Division of Clinical Sciences Northern Ontario School of Medicine

Background:Immunity plays a major role in carcinogenesis and this is the case also for hepatocellular carcinomas(HCC).Checkpoint inhibitors,novel drugs that enhance the immune system’s ability to attack cancers,have been successfully introduced for the therapy of various malignancies including *** important target of these drugs is the PD-L1/PD-1 ligand/receptor pair and several clinically available inhibitors of this pair *** sources:A search of the literature until April 20,2019 was performed in the MEDLINE/PubMed database,the Embase database and the Cochrane Central Register of Controlled *** clinical studies describing treatment with PD-L1/PD-1 inhibitors as monotherapy in HCC patients were *** characteristics with relevance for treatment efficacy,such as liver function,disease extend and previous treatment,were extracted from identified *** and survival outcomes were the primary focus of the *** estimates of response rates and survival were calculated using a random or fixed effect model,depending on *** common adverse effects were also recorded and ***:Three studies(two on nivolumab and one on pembrolizumab)with a total of 400 patients were included in the *** summary response rate(RR)was 17.3%[95%confidence interval(CI):13.2%–21.4%].The summary disease control rate(DCR)was 56.6%(95%CI:44.7%–68.5%).Summary progression free survival(PFS)was 3.5 months(95%CI:2.8–4.2 months).Summary overall survival(OS)was 10.4 months(95%CI:3.5–17.2 months).Adverse effect rate was low and also consistent with the adverse effect profile of PD-L1/PD-1 inhibitors in other disease ***:Pembrolizumab and nivolumab are the only checkpoint inhibitors with data in *** of their effectiveness discloses rates not dissimilar to other systemic therapies available for this *** interest also are the observed long responses in a sub-set of ***

关键词： Hepatocellular carcinoma Immune checkpoint inhibitors Nivolumab Pembrolizumab Meta-analysis

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调控串联三金属AuAgCu异质结上*CO中间体的吸附构型,促进CO2通过不对称C-C耦合电还原为乙醇（英文）

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Science China Materials 2025年第1期 173-179页

作者：石永霞李俊俊闵志雯王鑫亿侯曼马昊庄泽超秦毓辰孙源淼王定胜张志成 Key Laboratory of Organic Integrated Circuit Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of Chemistry School of Science Tianjin University Faculty of Materials Science and Energy Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Department of Chemistry Tsinghua University College of sciences Henan Agricultural University

在电化学CO2还原反应中,合理调节关键中间体*CO的吸附构型可以促进碳-碳（C–C）偶联生成多碳产物.在这项工作中,理论计算表明,通过顶式吸附的*CHO和三重位吸附的*CO在Cu位点上进行C–C耦合是一种能量有利的途径.作为概念验证,制备了串...

在电化学CO2还原反应中,合理调节关键中间体*CO的吸附构型可以促进碳-碳（C–C）偶联生成多碳产物.在这项工作中,理论计算表明,通过顶式吸附的*CHO和三重位吸附的*CO在Cu位点上进行C–C耦合是一种能量有利的途径.作为概念验证,制备了串联三金属AuAgCu异质结（Au@Ag/Cu）,其中Au@Ag位点上顶式吸附的*CO溢流到Cu位点后转变为三重位吸附,然后该三重位吸附的*CO和Cu位点上顶式吸附的*CHO进行不对称C–C偶联,促进了乙醇产物的形成.在-0.3 V ***的低电位下,乙醇法拉第效率最高为65.9%.我们的工作通过调节中间产物的吸附构型,为串联催化的内在机制提供了新的见解.

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S-type anion channel SLAC1's homologues inhibit inward potassium channels AKT2 and KAT2 in Arabidopsis

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Science Bulletin 2017年第7期62卷 464-466页

作者： Fen-Yong Yao Guo-Ning Qi Hui-Min Ren An Zhang Jamshaid Hussain Yong-Fei Wang National Key Laboratory of Plant Molecular Genetics Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200032 China University of Chinese Academy of sciences Shanghai 200032 China Biotechnology program Department of Environmental Sciences COMSATS Institute of Information Technology Abbottabad 22060 Pakistan

Cations and anions are involved in plant growth,development and signaling responses as essential nutrients,signaling molecules and osmotic components,and the dynamic movement of the diverse ions through biological mem... 详细信息

关键词： SLAC type

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A look into the past, present and future potential distributions of Talinopsis frutescens, a North American endemic lineage closely related to Cactaceae

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Journal of Arid Land 2020年第1期12卷 104-114页

作者： Mónica I MIGUEL-VÁZQUEZ Yasser S LÓPEZ DE OLMOS R Gilberto OCAMPO Department of Biology Basic Sciences CenterAutonomous University of Aguascalientes940 University AvenueAguascalientes 20130Mexico Biological and Health sciences PhD program Department of BiologyBiological and Health Sciences DivisionAutonomous Metropolitan UniversityIztapalapa 09340Mexico

Talinopsis frutescens(Anacampserotaceae,a family that is close related to Cactaceae)is a succulent species endemic to North *** aim of this study was to explore,using Ecological Niche Modeling(ENM),changes in potential distribution ranges considering different climate scenarios:past conditions during the Last Inter Glacial(LIG)and the Last Glacial Maximum(LGM),the present and projections for 2070(RCP 2.6 to 8.5).A pattern of contraction is observed during the LIG,which agrees with other studies focused in species from arid *** pattern was followed by a migration towards the south during the LGM and a possible recent expansion to the north as is observed in the present *** future projections show the same contraction and fragmentation patterns,resulting in three discontinuous areas:the northern part of the Chihuahuan Desert,the southern-central part of the Mexican Plateau,and the smallest one in the Tehuacán-Cuicatlán *** projections for future scenarios agree with other studies and support that global climate change tends to alter the current distribution of arid environment species.

关键词： Anacampserotaceae Caryophyllales ecological niche modeling succulent plants potential distribution

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Seasonal and Interannual Variations of Carbon Exchange over a Rice–Wheat Rotation System on the North China Plain

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Advances in Atmospheric sciences 2015年第10期32卷 1365-1380页

作者： CHEN Chen LI Dan GAO Zhiqiu Jianwu TANG GUO Xiaofeng WANG Linlin WAN Bingcheng State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of Sciences Graduate University of Chinese Academy of sciences program of Atmospheric and Oceanic sciences Princeton University The Ecosystems Center Marine Biological Laboratory

Rice-wheat （R-W） rotation systems are ubiquitous in South and East Asia, and play an important role in modulating the carbon cycle and climate. Long-term, continuous flux measurements help in better understanding the seasonal and interannual variation of the carbon budget over R-W rotation systems. In this study, measurements of CO2 fluxes and meteorological variables over an R-W rotation system on the North China Plain from 2007 to 2010 were analyzed. To analyze the abiotic factors regulating Net Ecosystem Exchange （NEE）, NEE was partitioned into gross primary production （GPP） and ecosystem respiration. Nighttime NEE or ecosystem respiration was controlled primarily by soil temperature, while daytime NEE was mainly determined by photosythetically active radiation （PAR）. The responses of nighttime NEE to soil temperature and daytime NEE to light were closely associated with crop development and photosynthetic activity, respectively. Moreover, the interannual variation in GPP and NEE mainly depended on precipitation and PAR. Overall, NEE was negative on the annual scale and the rotation system behaved as a carbon sink of 982 g C m 2 per year over the three years. The winter wheat field took up more CO2 than the rice paddy during the longer growing season, while the daily NEE for wheat and rice were -2.35 and -3.96 g C m-2, respectively. After the grain harvest was subtracted from the NEE, the winter wheat field became a moderately strong carbon sink of 251-334 g C m-2 per season, whereas the rice paddy switched to a weak carbon sink of 107-132 per season.

关键词： net ecosystem exchange gross primary production rice-wheat rotation system

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Multi-omics insights into neuronal regeneration and re-innervation

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Neural Regeneration Research 2021年第2期16卷 296-297页

作者： Muhammad Zain Chauhan Sanjoy K.Bhattacharya University of Arkansas for Medical sciences(UAMS) Little RockARUSA(Chauhan MZ)Miami Integrative Metabolomics Research CenterBascom Palmer Eye Institute program In Biomedical sciences and Neuroscience Graduate program University of MiamiMiamiFLUSA

The regeneration of peripheral nervous system and central nervous system(CNS)neurons after injury remains *** have come a long way since the identification of a 37 k Da protein specific for regenerating peripheral ner... 详细信息

关键词： al. nerves insight

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The Hilbert expansion of the Boltzmann equation in the incompressible Euler level in a channel

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Science China Mathematics 2025年第1期 39-88页

作者： Feimin Huang Weiqiang Wang Yong Wang Feng Xiao Academy of Mathematics and Systems Science Chinese Academy of Sciences School of Mathematical sciences University of Chinese Academy of Sciences Key Laboratory of Computing and Stochastic Mathematics (Ministry of Education) School of Mathematics and StatisticsHunan Normal University

The study of the hydrodynamic limit of the Boltzmann equation with physical boundary is a challenging problem due to the appearance of the viscous and Knudsen boundary *** this paper,the hydrodynamic limit from the Boltzmann equation with the specular reflection boundary condition to the incompressible Euler equations in a channel is *** on the multi-scaled Hilbert expansion,the equations with boundary conditions and compatibility conditions for interior solutions,and viscous and Knudsen boundary layers are derived under different scaling,***,some uniform estimates for the interior solutions,and viscous and Knudsen boundary layers are *** the help of the L2-L∞framework and the uniform estimates obtained above,the solutions to the Boltzmann equation are constructed by the truncated Hilbert expansion with multiscales,and hence the hydrodynamic limit in the incompressible Euler level is justified.

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Temporal and spatial differentiation in microhabitat use: Implications for reproductive isolation and ecological niche specification

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Integrative Zoology 2016年第5期11卷 375-387页

作者： Amaël BORZÉE Jun Young KIM Marina Andrade Martins DA CUNHA Donggeun Lee Eunchong SIN Sunmin OH Yoonjung YI Yikweon JANG Department of Life sciences and Division of EcoScience Ewha Womans UniversitySeoulKorea Interdisciplinary program of EcoCreative Ewha Womans UniversitySeoulKorea School of Biological sciences Seoul National UniversityKorea

Niche differentiation enables ecologically similar species to coexist by lessening competition over food and/or shelters and may be critical for reproductive isolation between closely related species in close ***cause no extra traits need to evolve,spatial and temporal differentiation may readily take place to complement other isolating *** closely related treefrog species occur together in Korea:the endangered Hyla suweonensis and the widespread Hyla *** calls are differentiated,but it is unclear whether call difference is sufficient for reproductive *** tracked individuals of both species to study fine-scale differentiation in microhabitat use in the diel cycle of the breeding season using a harmonic direction *** male movement patterns of both species revealed spatial and temporal differentiation in microhabitat use for calling and resting during the breeding *** of both *** and *** occurred in all 5 microhabitats identified in this study:rice paddy,ground,buried,grass and *** treefrog species showed general similarities in calling from rice paddies and resting in grass and ***,*** moved into rice paddies and produced advertisement calls 3 h earlier than *** differences likely minimize contact between the species and provide an additional isolating *** addition,the activity of *** may be contributing to the decline of this species,as resting in grass would increase dangers from predatory birds and habitat disturbance.

关键词： harmonic direction finding hylid treefrog pre-mating isolation mechanisms spatial isolation temporal isolation

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