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On-Surface Stereochemical Characterization of a Highly Curved Chiral Nanographene by Noncontact Atomic Force Microscopy and Scanning Tunneling Microscopy

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CCS Chemistry 2023年第12期5卷 2888-2896页

作者： Qigang Zhong Viktor Barat Daniel Csokas Kaifeng Niu Marcin Gorecki Animesh Ghosh Jonas Bjork Daniel Ebeling Lifeng Chi Andre Schirmeisen Mihaiela C.Stuparu Institute of Applied Physics Center for Materials Research(LaMa)Justus-Liebig University Giessen35392 Giessen School of Chemistry Chemical Engineering and BiotechnologyNanyang Technological University637371 Singapore Institute of Organic Chemistry Research Center for Natural SciencesH-1117 Budapest Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano and Soft MaterialsSoochow University215123 Suzhou Department of Physics Chemistry and BiologyIFMLinkoping University58183 Linkoping Institute of Organic Chemistry Polish Academy of Sciences01-224 Warsaw Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsMacao University of Science and TechnologyTaipa 999078MacaoChina

A highly distorted chiral nanographene structure composed of triple corannulene-fused[5]helicenes is prepared with the help of the Heck reaction and oxidative photocyclization with an overall isolated yield of 28%.The complex three-dimensional(3D)structure of the bowl-helix hybrid nanostructure is studied by a combination of noncontact atomic force microscopy(AFM)and scanning tunneling microscopy(STM)on the Cu(111)surface,density functional theory calculations,AFM/STM simulations,and high-performance liquid chromatography-electronic circular dichroism *** examination reveals a molecular structure in which the three bowl-shaped corannulene bladesd position themselves in a C3-symmetric fashion around a highly twisted triphenylene *** molecule appears to be shaped like a propeller in which the concave side of the bowls face away from the connected[5]helicene *** chirality of the nanostructure is confirmed by the direct visualization of both MMM and PPP enantiomers at the single-molecule level by scanning probe *** results underline that submolecular resolution imaging by AFM/STM is a powerful real-space tool for the stereochemical characterization of 3D curved chiral nanographene structures.

关键词： chirality at surfaces noncontact atomic force microscopy scanning tunnelling microscopy submolecular resolution imaging single-bond resolution curved nanographenes multiple helicenes chiral nanostructures bowl-helix hybrids scanning probe microscopy

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Providing Biodiversity and Ecosystem Services through Common Pool Resource Management as Hybrid Institution: On Eco-Net Advances and Payments for ESS in Cultural Landscapes

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Natural Resources 2017年第7期8卷 478-512页

作者： Ernst-August Nuppenau Department of Agricultural Policy and Market Analysis Justus-Liebig-University Giessen Germany

In many rural areas the management of natural resources is confronted with the tragedy of the common problem;not only historically but also in modern times. Especially where biodiversity loss appears and ecosystem services (ESS) decline, the lack of public management might be related to inappropriate institutional setups. Two distinct directions of thought prevail on the subject. On one hand, proponents of property rights and minimal state intervention eagerly analyse the feat of modern institutions and view private property and payments for ecosystem services (PES) as solution. On the other hand, common pool resource management (CPM) has regained interest because nature is not a straight commodity and cooperation in ESS provision is needed (partly also to facilitate PES). In this paper, the two aspects are combined in a hybrid institution. We suggest a new way of approaching institutional questions in ESS provision as synthesis of private and publically controlled ESS provision. It is contemplated as ESS governance of local eco-nets given the potential for inclusion of public management. In principle, the result is a controlled framework of land sharing between farm land (private ownership) and communally managed?land (public ownership). Some land is devoted to hedges, wetlands, etc. Land is an immobile resource and can be used for EESs based on planned species prevalence, whereas communities compete also for labour which can move (or not). Governance is acting in competing constituencies and is a mean to control the regulating entities (public ESS management). At a meta-level we combine the need for public management with advantages of a competitive neo-classical framework. This contribution to CPM investigates a model of a group whose well-being is based on ESS provision in a cultural landscape. By statutory regulations, land (field margins), is ex-tracted from farms for ESS;in particular a leader (called reeve) guides farmers. Two institutions are compared: (1)

关键词： Common Property Management Competition between Communities ESS Regulations

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Compact,Low-Cost,14.5GHz All-Permanent Magnet Field ECR Ion Source

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Chinese Physics C 2007年第S1期31卷 66-69页

作者： E.Galutschek E.Salzborn F.Aumayr HP.Winter Institut für Allgemeine Physik Vienna University of TechnologyVienna 1040Austria Institut für Atom-und Molekülphysik Justus-Liebig UniversityGiessen 35390Germany

A compact 14.5GHz electron cyclotron resonance (ECR) ion source for the production of slow, multiply charged ions has been constructed,with the plasma-confining magnetic field produced exclusively by permanent *** power of up to 175W in the frequency range from 12.75 to *** is transmitted from ground potential via a PTFE window into the water-cooled plasma chamber which can be equipped with an aluminum *** waveguide coupling system serves also as biased electrode,and two remotely-controlled gas inlet valves connected via an insulating break permit plasma operation in the gas- mixing mode.A triode extraction system sustains ion acceleration voltages between 1kV and *** ECR ion source is fully computer-controlled and can be remotely operated from any desired location via Ethernet.

关键词： low-cost compact ECRIS all-permanent magnet ECRIS ECRIS for multiply charged ions

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Nuclear Hexadecapole Deformation Effects on the Production of Super-Heavy Elements

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Chinese Physics Letters 2010年第6期27卷 66-69页

作者： WANG Nan DOU Liang ZHAO En-Guang Werner Scheid College of Physics Shenzhen University Shenzhen 518060 Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 Center of Theoretical Nuclear Physics National Laboratory of Heavy ion Accelerator Lanzhou 730000 Institut fur Theoretisehe Physik Justus-Liebig-Universitat D-35392 Giessen Germany

We investigate the effects of the nuclear hexadecapole deformations on the interaction potentials between nuclei, the driving potentials and the fusion probabilities for some cold fusion reactions leading to super-heavy elements. It is found that nuclear hexadecapole deformations change significantly the structure of the driving potentials and the fusion probabilities for some reaction channels.

关键词： Nuclear Deformation Effects Elements

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Infectious Disease Research—What Role Is There for Hydrologists?

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Journal of Water Resource and Protection 2017年第2期9卷 139-162页

作者： Kristina Heinrich Martin Bach Lutz Breuer Institute for Landscape Ecology and Resources Management (ILR) Research Centre for Bio Systems Land Use and Nutrition (iFZ) Justus Liebig University Giessen Giessen Germany Centre for International Development and Environmental Research (ZEU) Justus Liebig University Giessen Giessen Germany

Numerous virulent and widespread diseases are related to water. The transmission and outbreak of water-related diseases are closely coupled to their hydrological environment. Changes in this environment and the associated hydrological processes may affect the occurrence and virulence of water-related diseases. Environmental changes can be manifold, including e.g. climate and land use, agricultural management or urbanization. Water fluxes and storages play a dominant role in describing disease outbreak, transmission and transport. New land cover types often alter landscape scale water storages. If the effects of changes could be better understood, predictions about the distribution, emergence or outbreak of water-related diseases would be possible. Furthermore, the collaboration of experts from different disciplines is essential for accurate spatial and temporal prediction of water-related disease outbreaks. Here we review the current state of knowledge of water-related diseases and present a general classification of these diseases, followed by a discussion of their major drivers. This review focuses particularly on hydrologists and how they can contribute with their understanding of hydrological processes.

关键词： Water-Related Diseases Climate Change Irrigation Land Use Change Population Growth

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Characterization of seedling proteomes and development of markers to distinguish the Brassica A and C genomes

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Journal of Genetics and Genomics 2010年第5期37卷 333-340页

作者： Fang Kong Cailin Ge Xiaoping Fang Rod J. Snowdon Youping Wang College of Bioscience and Biotechnology Yangzhou University Yangzhou 225009 China Oil Crops Research Institute Chinese Academy of Agricultural Sciences Wuhan 430062 China Institute for Plant Breeding and Crop Science I Justus Liebig University Heinrich-Buff-Ring 26-32 Giessen 35392 Germany

The diploid species Brassica rapa （genome AA） and B. oleracea （genome CC） were compared by full-scale proteome analyses of seedling. A total of 28.2% of the proteins was common to both species, indicating the existence of a basal or ubiquitous proteome. However, a number of discriminating proteins （32.0%） and specific proteins （39.8%） of the Brassica A and C genomes, respectively, were identified, which could represent potentially species-specific functions. Based on these A or C genome-specific proteins, a number of PCR-based markers to distinguish B. rapa and B. oleracea species were also developed.

关键词： Brassica rapa Brassica oleracea proteomics molecular marker

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CTX-M producing Escherichia coli isolated from cattle feces in Bogor slaughterhouse,Indonesia

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Asian Pacific Journal of Tropical Biomedicine 2016年第7期6卷 605-608页

作者： Mirnawati Bachrum Sudarwanto Denny Widaya Lukman Hadri Latif Herwin Pisestyani Eddy Sukmawinata mer Akineden Ewald Usleber Laboratory of Veterinary Public Health Faculty of Veterinary MedicineBogor Agricultural University Veterinary Public Health Programme Veterinary Public HealthGraduate SchoolBogor Agricultural University Dairy Sciences Institute of Veterinary Food ScienceJustus-Liebig University Giessen

Objective: To determine the occurrence of CTX-M producing Escherichia coli(E. coli)from cattle feces in Bogor slaughterhouse, ***: A total of 220 cattle feces samples were collected from Bogor slaughterhouse from March to April 2015. Presence of extended-spectrum beta-lactamase(ESBL) producing E. coli was detected by disc diffusion test based on the recommendation from Clinical and Laboratory Standards Institute(2014). Bacterial strains which were confirmed as producing ESBLs were further analyzed for the presence of bla genes of the ESBL by ***: The results showed that CTX-M producing E. coli isolates were detected in 19 samples from 220 samples(8.6%). The b-lactamase genes detected were CTX-M-1(n = 10) and CTX-M-9(n = 9). All of the CTX-M producing E. coli isolates showed multidrug resistance phenotypes to at least four antibiotics. The highest incidence of antibiotics resistance was showed to ampicillin(100.0%), cefotaxime(100.0%), and cefpodoxime(100.0%), followed by streptomycin(84.3%), trimethoprim-sulfamethoxazole(73.7%), erythromycin(52.6%), kanamycin(26.3%), doxycycline(10.5%), and ceftazidime(0.0%).Conclusions: Detection of CTX-M-producing E. coli in cattle feces raises important questions as they can represent a potential risk factor to public health.

关键词： Cattle feces CTX-M Escherichia coli Slaughterhouse

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Neuropharmacological Characterization of Extracts from Rhodiola rosea, Oenothera paradoxa and Paullinia cupana in Comparison to Caffeine

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Pharmacology & Pharmacy 2016年第7期7卷 290-303页

作者： Wilfried Dimpfel Leonie Schombert Tanausú Vega-Morales Julia Charlotte Wiebe justus-liebig-university giessen Giessen Germany NeuroCode AG Wetzlar Germany PoliNat Polifenoles Naturales Las Palmas Spain

To find possible therapeutic applications involving the Central Nervous System (CNS) for herbals is a major challenge during functional food and drug discovery and development programmes. Despite the availability of numerous in vitro and in vivo tests, there is no single agreed screening procedure for pharmacological testing of herbal extracts with anticipated CNS activity. Experience gained from more than 25 years of testing has shown that two models give reasonably reliable orientation for future CNS applications: construction of an electropharmacogram based on wireless recording of field potentials from the depth of the brain of freely moving rats (Tele-Stereo-EEG) and recording of the population spike produced by pyramidal cells from hippocampal slices in vitro. A combination of these two methods has now been used to characterize the pharmacological profile of extracts from Rhodiola rosea root, Oenothera paradoxa seeds and Paullinia cupana seeds. Spectral analysis of field potentials revealed attenuation of alpha2 and beta1 waves was common for all extracts. According to previous studies, this is interpreted as activation of the dopaminergic and glutamatergic transmission. In addition, Oenothera and Rhodiola extracts attenuated delta and theta power, probably related to interference with the cholinergic and norepinephrinergic transmission, respectively. Using discriminant analysis for comparison with reference pharmaceutical and botanical drugs, Rhodiola projected near the position of Ginkgo extract, whereas Oenothera extract was projected near the position of Tramadol, an analgesic drug. Physical motion was increased only in the presence of Paullinia extract and caffeine. Increases of long-term potentiation were observed in the presence of Rhodiola extract, Paullinia extract and caffeine. The combined information predicts stimulant and cognitive function-enhancing activities in humans for the Rhodiola extract, which could also be used as a possible caffeine-rep

关键词： Pharmacology Field Potentials Hippocampal Slices Rhodiola rosea Oenothera paradoxa Paullinia cupana Caffeine RhodioLife® Discriminant Analysis

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High-conductivity free-standing Li_(6)PS_(5)Cl/poly(vinylidene difluoride)composite solid electrolyte membranes for lithium-ion batteries

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Journal of Materiomics 2020年第1期6卷 70-76页

作者： Shuo Wang Xue Zhang Sijie Liu Chengzhou Xin Chuanjiao Xue Felix Richter Liangliang Li Lizhen Fan Yuanhua Lin Yang Shen Jurgen Janek Ce-Wen Nan State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Institute of Physical Chemistry&Center for Materials Research Justus-Liebig-University GiessenHeinrich-Buff-Ring 17D-35392GiessenGermany Institute of Advanced Materials and Technology University of Science and Technology BeijingBeijing100083China

Bulk-type all-solid-state batteries(ASSBs)using sulfide solid electrolyte are considered as a promising alternative to commercial lithium-ion batteries owing to their high energy density and ***,cell energy density is often comparatively low due to use of a thick solid electrolyte separator and a lithium alloy as *** achieving high-performance ASSBs,creating a thin free-standing electrolyte with high-conductivity and good cycling stability against lithium anode is *** this work,we present Li_(6)PS_(5)Cl/poly(vinylidene difluoride)(LPSCl/PVDF)composite electrolytes prepared by a slurry *** influence of the PVDF content on the microstructure,morphology,ionic conductivity and activation energy of the LPSCl/PVDF electrolytes is systematically ***-standing LPSCl/PVDF membranes with a thickness of 100-120 mm and a high ionic conductivity of about 1·10^(-3) S cm^(-1) at 25℃ are *** adding PVDF to the LPSCl electrolyte,the cycling stability of the LPSCl electrolyte against lithium metal improves ***,LPSCl/PVDF composite electrolytes are promising candidates to be used in ASSBs.

关键词： Composite solid electrolyte Li_(6)PS_(5)Cl Poly(vinylidene difluoride)

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Effect of orchard age on soil nitrogen transformation in subtropical China and implications

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Journal of Environmental Sciences 2015年第8期27卷 10-19页

作者： Yushu Zhang Jinbo Zhang Tongbin Zhu Christoph Müller Zucong Cai School of Geography Sciences Nanjing Normal University Institute of Soil and Fertilizer Fujian Academy of Agricultural Sciences Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Key Laboratory of Virtual Geographical Environment Ministry of Education Nanjing Normal University Department of Plant Ecology Justus-Liebig University Giessen

A better understanding of nitrogen transformation in soils could reveal the capacity for biological inorganic N supply and improve the efficiency of N fertilizers. In this study, a15 N tracing study was carried out to investigate the effects of converting woodland to orchard, and orchard age on the gross rates of N transformation occurring simultaneously in subtropical soils in Eastern China. The results showed that inorganic N supply rate was remained constant with soil organic C and N contents increased after converting woodland into citrus orchard and with increasing orchard age. This phenomenon was most probably due to the increase in the turnover time of recalcitrant organic-N, which increased with decreasing soil p H along with increasing orchard age significantly. The amo A gene copy numbers of both archaeal and bacterial were stimulated by orchard planting and increased with increasing orchard age. The nitrification capacity（defined as the ratio of gross rate of nitrification to total gross rate of mineralization） increased following the Michaelis–Menten equation, sharply in the first 10 years after woodland conversion to orchard, and increased continuously but much more slowly till 30 years. Due to the increase in nitrification capacity and unchanged NO3-consumption, the dominance of ammonium in inorganic N in woodland soil was shifted to nitrate dominance in orchard soils. These results indicated that the risk of NO3-loss was expected to increase and the amount of N needed from fertilizers for fruit growth did not change although soil organic N accumulated with orchard age.

关键词： 15N tracing technique Gross rates of nitrogen transformation Subtropical orchard soil

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