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chemical profile of the secondary metabolites produced by a deep-sea sediment-derived fungus Penicillium commune SD-118

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Chinese Journal of Oceanology and Limnology 2012年第2期30卷 305-314页

作者：尚卓李晓明孟莉李春顺高书山黄才国王斌贵 Key Laboratory of Experimental Marine biology Institute of OceanologyChinese Academy of Sciences Graduate University of Chinese Academy of Sciences Department of Biochemistry and Molecular biology Second Military Medical University

Bioassay-guided fractionation of the crude extract from Penicillium commune SD-118, a fungus obtained from a deep-sea sediment sample, resulted in the isolation of a known antibacterial compound, xanthocillin X (1), and 14 other known compounds comprising three steroids (2-4), two ceramides (5 and 6), six aromatic compounds (7-12), and three alkaloids (13-15). Xanthocillin X (1) was isolated for the first time from a marine fungus. In the bioassay, xanthocillin X (1) displayed remarkable antimicrobial activity against Staphylococcus aureus and Escherichia coli, and significant cytotoxicity against MCF-7, HepG2, H460, Hela, Du145, and MDA-MB-231 cell lines. Meleagrin (15) exhibited cytotoxicity against HepG2, Hela, Du145, and MDA-MB-231 cell lines. This is the first report of the cytotoxicity of xanthocillin X (1).

关键词： bioguided isolation deep-sea sediment-derived fungus Penicillium commune xanthocillin X antibacterial activity cytotoxicity

Facile synthesis of metal-organic frameworks embedded in interconnected macroporous polymer as a dual acid-base bifunctional catalyst for efficient conversion of cellulose to 5-hydroxymethylfurfural

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Chinese Journal of chemical Engineering 2022年第4期35卷 169-181页

作者： Yanan Wei Yunlei Zhang Bing Li Wen Guan Changhao Yan Xin Li Yongsheng Yan Institute of Green Chemistry and chemical Technology School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212000China Research Center of Fluid Machinery Engineering and Technology Jiangsu UniversityZhenjiang 212000China

5-Hydroxymethylfurfural(5-HMF),as a key platform compound for the conversion of biomass to various biomass-derived chemicals and biofuels,has been attracted extensive *** this research,using Pickering high internal phase emulsions(Pickering HIPEs)as template and functional metal-organic frameworks(MOFs,UiO-66-SO;H and UiO-66-NH;)/Tween 85 as co-stabilizers to synthesis the dual acid-base bifunctional macroporous polymer catalyst by one-pot process,which has excellent catalytic activity in the cascade reaction of converting cellulose to *** effects of the emulsion parameters including the amount of surfactant(ranging from 0.5%to 2.0%(mass)),the internal phase volume fraction(ranging from 75%to 90%)and the acid/base Pickering particles mass ratio(ranging from 0:6 to 6:0)on the morphology and catalytic performance of solid catalyst were systematically *** results of catalytic experiments suggested that the connected large pore size of catalyst can effectively improve the cellulose conversion,and the synergistic effect of acid and base active sites can effectively improve the 5-HMF *** highest 5-HMF yield,about 40.5%,can be obtained by using polymer/MOFs composite as catalyst(Poly-P12,the pore size of(53.3±11.3)μm,the acid density of 1.99 mmol·g^(-1)and the base density of 1.13 mol·g^(-1))under the optimal reaction conditions(130℃,3 h).Herein,the polymer/MOFs composite with open-cell structure was prepared by the Pickering HIPEs templating method,which provided a favorable experimental basis and theoretical reference for achieving efficient production of high addedvalue product from abundant biomass.

关键词： Catalyst Biomass Hydrolysis 5-Hydroxymethylfurfural Pickering high internal phase emulsions templated polymer Acid-base bifunctional site

Improving ionic conductivity of polymer-based solid electrolytes for lithium metal batteries

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Chinese Journal of chemical Engineering 2022年第3期35卷 202-215页

作者： Q.Yang A.Wang J.Luo W.Tang Key Laboratory for Green chemical Technology of Ministry of Education State Key Laboratory of Chemical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Because of its superior safety and excellent processability,solid polymer electrolytes(SPEs)have attracted widespread *** lithium based batteries,SPEs have great prospects in replacing leaky and flammable liquid ***,the low ionic conductivity of SPEs cannot meet the requirements of high energy density systems,which is also an important obstacle to its practical *** this respect,escalating charge carriers(***^(+))and Li^(+)transport paths are two major aspects of improving the ionic conductivity of *** article reviews recent advances from the two perspectives,and the underlying mechanism of these proposed strategies is discussed,including increasing the Li^(+)number and optimizing the Li^(+)transport paths through increasing the types and shortening the distance of Li^(+)transport *** is hoped that this article can enlighten profound thinking and open up new ways to improve the ionic conductivity of SPEs.

关键词： Solid polymer electrolyte Ion conductivity Charge carriers Transport paths Lithium battery

Engineered biocontainable RNA virus vectors for non-transgenic genome editing across crop species and genotypes

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Molecular Plant 2023年第3期16卷 616-631页

作者： Qian Liu Chenglu Zhao Kai Sun Yinlu Deng Zhenghe Li State Key Laboratory of Rice biology Institute of BiotechnologyZhejang UniversityHangzhouChina Ministry of Agricutture Key Laboratory of Molecular biology of Crop Pathogens and Insect Pests Zhejiang UniversityHangzhouChina Key Laboratory of biology of Crop Pathogens and Insects of Zhejang Province Zhejang UniversityHangzhouChina

CRISPR/Cas genome-editing tools provide unprecedented opportunities for basic plant biology research and crop ***,the lack of robust delivery methods has limited the widespread adoption of these revolutionary technologies in plant ***,we report an efficient,non-transgenic CRISPR/Cas delivery platform based on the engineered tomato spotted wilt virus(TSWV),an RNA virus with a host range of over 1000 plant *** eliminated viral elements essential for insect transmission to liberate genome space for accommodating large genetic cargoes without sacrificing the ability to infect plant *** resulting non-insect-transmissible viral vectors enabled effective and stable in planta delivery of Cas12a and Cas9 nucleases as well as adenine and cytosine base *** systemically infected plant tissues,the deconstructed TSWV-derived vectors induced efficient somatic gene mutations and base conversions in multiple crop species with little genotype *** with heritable,bi-allelic mutations could be readily regenerated by culturing the virus-infected tissues in vitro without antibiotic ***,we showed that antiviral treatment with ribavirin during tissue culture cleared the viral vectors in 100%of regenerated plants and further augmented the recovery of heritable *** many plants are recalcitrant to stable transformation,the viral delivery system developed in this work provides a promising tool to overcome gene delivery bottlenecks for genome editing in various crop species and elite varieties.

关键词： genome editing CRISPR-Cas base editor RNA virus vector tomato spotted wilt virus bunyavirus delivery non-transgenic

Tornado Impacts in the US from 1950-2015: A GIS-Based Analysis of Vulnerability and Evolving Risk Zones for Human Casualties

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Journal of Geographic Information System 2023年第5期15卷 563-579页

作者： Seong Nam Hwang Kayla Meier Environmental Science program Department of Biology Southeast Missouri State University Cape Girardeau Missouri USA

The United States is one of the major countries in the world that faces a numerous number of tornadoes every year, directly and indirectly experiencing extensive property damage and human casualties as well as a variety of demographic, socioeconomic, and environmental impacts. This research provides a GIS-based examination of the ways past tornadoes that occurred in the US in the period 1950-2015 have played out in the context of bodily injuries and loss of human life. To this end, the research collected major secondary data (i.e., georeferenced tornado point data) from the Storm Prediction Center (SPC) tornado database and conducted raster-based spatial analysis, utilizing techniques like point density analysis and map algebra to locate areas that have a high risk of tornadoes and to create maps that show relationships between the past tornado events and human casualties. One of the major research findings shown by the spatial analysis was that the geographic areas or regions impacted by tornadoes varied over time. In addition, the statistical results showed a trend that the tornado-prone regions extend from “Tornado Alley” to the states of Illinois, Mississippi, Tennessee, Alabama, and Florida, indicating that the communities in those states that are newly considered to be vulnerable to tornadoes should step up to develop their own tornado mitigation plan to help protect the public and its property from tornadoes. Such plans can play a crucial role in safeguarding the public and protecting property from tornadoes’ potential impact. Additionally, urban planners and policymakers can use this information to make informed decisions about building codes and infrastructure development in tornado-prone areas, potentially reducing the impact of future tornado events on human lives and property.

关键词： Tornadoes Emergency Management Spatial Analysis Environmental Hazard natural Hazard

Analysis of emergy-based metabolic efficiency and environmental pressure on the local coupling and telecoupling between urbanization and the eco-environment in the Beijing-Tianjin-Hebei urban agglomeration

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Science China Earth Sciences 2017年第6期60卷 1083-1097页

作者： FANG ChuangLin REN YuFei Institute of Geographic Sciences and natural Resources Research Chinese Academy of Sciences Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China

We use emergy-based urban metabolism analysis in this study to investigate the local coupling and telecoupling between urbanization and the eco-environment in the Beijing-Tianjin-Hebei urban agglomeration. Our analysis encompasses the last 35 years spanning the period between 1980 and 2014. In addition, we analyze urban metabolic efficiency and environmental pressure in these couplings. There are three main conclusions of this study. First, we show that the total metabolic emergy value of the Beijing-Tianjin-Hebei urban agglomeration has increased over the last 35 years, and that external elements have replaced internal ones as the leading contributors to urban metabolism in this region. The proportion of metabolic emergy derived from external elements increased from 30.87% in 1980 to 67.43% in 2014. The emergy extroversion ratio has continued to increase over our study period, while the development of this urban agglomeration had become progressively and more heavily reliant on external elements. Second, over the study period, the metabolic emergy intensity of elements of local coupling and telecoupling in the Beijing-Tianjin-Hebei urban agglomeration has declined at an accelerating rate, from 1.15×10^(21) Sej/100 million RMB in1980 to 9.69×10^(19) Sej/100 million RMB in 2014. This reflects a continuous increase in the economic efficiency of this ***, emergy use per capita increased from 7.8×10^(15) Sej/person in 1980 to 5.83×10^(16) Sej/person in 2014, suggesting a gradual rise in the level of social welfare in this urban agglomeration. However, we also observed a consistently elevated environmental loading ratio(ELR) in our analysis in terms of metabolism of local coupling and telecoupling elements. This result indicates that environmental pressure has also increased constantly within the Beijing-Tianjin-Hebei urban agglomeration. Third,our analysis shows that the ELR of metabolic emergy from internal elements increased from 8.30 in 1980 to 43.46

关键词： Urbanization Eco-environment Local coupling and telecoupling Total metabolic emergy value Metabolic emergy intensity Environmental pressure Beijing-Tianjin-Hebei urban agglomeration

半全氟烷基链对A-DA′D-A型小分子受体及其光伏性能的影响（英文）

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Science China Materials 2024年

作者：刘玮乃奕杰陈伟琨郑官豪杰梁松挺郭学益袁俊邹应萍 College of Chemistry and chemical Engineering Central South University School of Metallurgy and Environment Central South University Shanghai Synchrotron Radiation Facility (SSRF) Zhangjiang LabShanghai Advanced Research InstituteChinese Academy of Sciences National Engineering Research Center of Advanced Energy Storage Materials

本研究设计并合成了一种半全氟烷基链取代的A-DA′D-A型小分子受体m-TF9,并将其用于制备高效有机太阳能电池（OSCs）.与烷基取代的小分子受体m-TH相比, m-TF9表现出更紧密的分子堆积和更低的表面自由能.与PTQ10共混后, m-TF9可以实现77...

本研究设计并合成了一种半全氟烷基链取代的A-DA′D-A型小分子受体m-TF9,并将其用于制备高效有机太阳能电池（OSCs）.与烷基取代的小分子受体m-TH相比, m-TF9表现出更紧密的分子堆积和更低的表面自由能.与PTQ10共混后, m-TF9可以实现77.3%的高填充因子.引入1,4-二氟苯作为添加剂调节分子间相互作用,基于PTQ10:m-TF9的OSC获得了16.3%的高效率,短路电流（JSC）提高至27.0 mA cm-2.此外,基于m-TF9的OSC在空气和氮气环境中都实现了良好的储存稳定性.本工作表明半全氟烷基链修饰对A-DA′D-A型小分子受体光电性质,分子聚集和堆积的影响,可以有效提高器件电荷载流子传输,并提高其光伏性能.

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Efficient blue light-responsed dithienylethenes with exceptional photochromic performance

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Chinese chemical Letters 2023年第3期34卷 392-395页

作者： Ziyong Li Xinyu Gao Haining Zhang Xiaoxie Ma Yifang Liu Hui Guo Jun Yin College of Food and Drug College of Chemistry and Chemical EngineeringLuoyang Key Laboratory of Organic Functional MoleculesLuoyang Normal UniversityLuoyang 471934China College of Chemistry Key Laboratory of Pesticide and Chemical BiologyMinistry of EducationHubei International Scientific and Technological Cooperation Base of Pesticide and Green SynthesisInternational Joint Research Center for Intelligent Biosensing Technology and HealthCentral China Normal UniversityWuhan 430079China

Three novel dithienylethenes modified by bifluoroboron β-diketonate fragments have been successfully developed. Upon blue light irradiation, they reached photostationary state within 2-5 s, as well as 100% conversion ratio and photocyclization quantum yield of > 0.70. Such fascinating photochromism were endowed by collaborative role of electron-withdrawing effect of BF_(2)bdk group to reduce HOMO-LUMO electronic gap for the open isomer, together with intramolecular hydrogen bonds and CH-π interactions favoring antiparallel conformation fixation. Moreover, they displayed specific discrimination and photoswitchable bacterial imaging for S. aureus.

关键词： Dithienylethene Photochromism Fluorescent switching behavior Visible light Bifluoroboronβ-diketonate(BF_(2)bdk) Bacterial imaging

Ni-catalyzed carbon–carbon bonds cleavage of mixed polyolefin plastics waste

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Journal of Energy Chemistry 2023年第10期85卷 562-569,I0014页

作者： Xiaoqin Si Jiali Chen Zhengwei Wang Yue Hu Zhiwen Ren Rui Lu Lu Liu Jing Zhang Liwei Pan Rui Cai Fang Lu State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Research Center for Energy Strategy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina College of Environmental and chemical Engineering Dalian UniversityDalian 116622LiaoningChina

The inert carbon–carbon(C–C) bonds cleavage is a main bottleneck in the chemical upcycling of recalcitrant polyolefin plastics waste. Here we develop an efficient strategy to catalyze the complete cleavage of C–C bonds in mixed polyolefin plastics over non-noble metal catalysts under mild conditions. The nickelbased catalyst involving Ni_(2)Al_(3) phase enables the direct transformation of mixed polyolefin plastics into natural gas, and the gas carbon yield reaches up to 89.6%. Reaction pathway investigation reveals that natural gas comes from the stepwise catalytic cleavage of C–C bonds in polypropylene, and the catalyst prefers catalytic cleavage of terminal C–C bond in the side-chain with the low energy ***, our developed approach is evaluated by the technical economic analysis for an economically competitive production process.

关键词： Ni-based catalyst Mixed polyolefin plastics C–C bonds cleavage