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二维核磁共振谱研究3(r),8-二甲基-2(r),5-二(1-甲基-乙基)-6-酮-2,3,6,7,9,10-六氢-1h-3A,7-乙薁-10-腈的立体结构

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科学通报 1989年第20期34卷 1543-1546页

作者：韩秀文 h.rüegger J.Sonderegger 中国科学院大连化学物理研究所 Spectrospin AG Zürich

郭永沺等由莪术醇合成(艹卓)酮类化合物,进而合成出有明显降压作用的拟生物碱新化合物。其结晶性中间产物的结构确定对鉴定最终还原产物和合成、设计其它改性物十分重要。由元素分析和质谱数据确定了此未知物的分子式为C_(21)h_(28)NO;... 详细信息

郭永沺等由莪术醇合成(艹卓)酮类化合物,进而合成出有明显降压作用的拟生物碱新化合物。其结晶性中间产物的结构确定对鉴定最终还原产物和合成、设计其它改性物十分重要。由元素分析和质谱数据确定了此未知物的分子式为C_(21)h_(28)NO;红外谱表明了酮基、异丙基、

关键词：立体结构核磁共振

Biomass Template Derived Boron/Oxygen Co-Doped Carbon Particles as Advanced Anodes for Potassium-Ion Batteries

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Energy & Environmental Materials 2022年第1期5卷 344-352页

作者： Xueyu Lian Zhongti Sun Qingqing mei Yuyang Yi Junhua Zhou Mark h.rummeli Jingyu Sun College of Energy Soochow Institute for Energy and Materials InnovationS(SIEMIS)Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006China Department of Chemistry University of ManchesterManchester M139PLUK Leibniz Institute for Solid State and Materials research Dresden P.O.Box 270116Dresden D-01171Germany Centre of Polymer and Carbon Materials Polish Academy of SciencesM.Curie-Sklodowskiej 34Zabrze 41-819Poland Institute of Environmental Technology VSB-Technical University of Ostrava17.Listopadu 15Ostrava 70833Czech Republic Beijing Graphene Institute(BGI) Beijing 100095China

Among various anode candidates for potassium-ion batteries,carbonaceous materials have attracted significant attention due to their overwhelming advantages including cost-effectiveness and environmental ***,the inferior specific capacity and the sluggish.reaction kinetics hinder the furth.r development in this ***,we report biomass templated synthesis of boron/oxygen heteroatom co-doped carbon particles(BO-CPs)via direct plasma-enhanced chemical vapor *** the combined advantages of abundant active sites,large accessible surface area,and functional groups,BO-CP anode exhibits high.reversible specific capacity(426.5 mAh g^(-1)at 0.1 A g^(-1))and excellent rate performance(166.5 mAh g^(-1)at 5 A g^(-1)).The K-ion storage mechanism is probed by operando raman spectroscopy,ex situ X-ray photoelectron spectroscopy/electrochemical impedance spectroscopy,galvanostatic intermittent titration technique measurements,and theoretical *** synergistic effect of boron and oxygen co-doping greatly facilitates the performance of carbon-based anode,wh.rein boron dopant improves the conductivity of carbon framework and the oxygen dopant affords ample active sites and thus h.rvests additional specific *** work is anticipated to propel the development of high-performance anode materials for emerging energy storage devices.

关键词： anode B/O co-doping carbon high capacity potassium-ion batteries

Sexual audience affects male's reproduction investment without consequences on reproductive outputs

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Insect Science 2022年第4期29卷 1170-1180页

作者： Philippe Louâpre Karen Muller Soline Bettencourt-Amarante Denis Thiery Jérôme Moreau UMr CNrS 6282 Biogeosciences UniversitéBourgogne Franche-ComtéDijonFrance INrA UMr 1065 Santéet Agroecologie du Vignoble Institut des Science de la Vigne et du VinVillenave d'OrnonCedexFrance INrA UMr 1065 SaveUniversitéde BordeauxBordeaux Sciences AgroVillenave d'OrnonCedexFrance

Males evolved plastic strategies to respond to male-male competition and exhibit adaptive traits and behaviors maximizing their access to the females and limiting sperm *** behaviors allow males to express quick responses to current sexual audience,that is,the number of nearby conspecifics prone to *** contrast,physiological responses are frequently delayed because they are constrained by the time and resources having to be mobilized to produce and export sperm and associated *** is especially critical in species for which males produce *** we investigated in what extend moth males(the tortricid moth Lobesia botrana)producing spermatoph.res exhibit plastic behavioral and physiological responses to different sexual audiences before and during mating and the consequences for their reproductive *** found that males adjusted their mating behaviors and spermatoph.re size to a potentially elevated risk of sperm competition perceived before *** addition,males responded to the closed presence of females during mating by reducing their mating ***,the various behavioral and physiological responses we highlighted h.re were not fully reflected in their reproductive performance as we did not reveal any effect on fecundity and fertility of their *** selective pressure exerted on males experiencing male-male competition could thus be sufficient to trigger adjustment in male mating behaviors but constrains physiological responses according to the perception of competition.

关键词： Lobesia borrund male-male compeition mating behavior sexual conflict sexual scletion sperm competition

Enhanced π-π Interactions Between a C_(60) Fullerene and a Buckle Bend on a Double-Walled Carbon Nanotube

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Nano research 2010年第2期3卷 92-97页

作者： Sandeep Gorantla Stanislav Avdoshenko Felix Börrnert Alicja Bachmatiuk Maria Dimitrakopoulou Franziska Schäffel ronny Schönfelder Jürgen Thomas Thomas Gemming Jamie hWarner Gianaurelio Cuniberti Jürgen Eckert Bernd Büchner Mark h.rümmeli IFW Dresden P.O.Box 270116D-01171 DresdenGermany Institute for Materials Science and Max Bergmann Center of Biomaterials Dresden University of TechnologyDresden 01062Germany Department of Materials University of OxfordParks Rd.Oxford OX13PHUnited Kingdom

In situ low-voltage aberration corrected transmission electron microscopy(TEM)observations of the dynamic entrapment of a C_(60) molecule in the saddle of a bent double-walled carbon nanotube is *** fullerene interaction is non-covalent,suggesting that enhancedπ-πinteractions(van der Waals forces)are *** molecular dynamics calculations confirm that the increased interaction area associated with a buckle is sufficient to trap a ***,they show hopping behavior in agreement with our experimental *** findings furth.r our understanding of carbon nanostructure interactions,which are important in the rapidly developing field of low-voltage aberration corrected TEM and nano-carbon device fabrication.

关键词： Carbon nanotubes fullerenes low-voltage transmission electron microscopy molecule trap

high-performance electronics and optoelectronics of monolayer tungsten diselenide full film from pre-seeding strategy

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InfoMat 2021年第12期3卷 1455-1469页

作者： Shu Zhang Jinbo Pang Qilin Cheng Feng Yang Yu Chen Yu Liu Yufen Li Thomas Gemming Xiaoyan Liu Bergoi Ibarlucea Jiali Yang hong Liu Weijia Zhou Gianaurelio Cuniberti Mark h.rümmeli Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Th.rapy in Universities of Shandong Institute for Advanced Interdisciplinary Research(iAIR)University of JinanJinanChina School of Chemistry and Chemical Engineering University of JinanJinanChina Department of Chemistry Southern University of Science and TechnologyShenzhenChina Institute of high Energy Physics Chinese Academy of SciencesBeijingChina College of Energy Soochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhouChina Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow UniversitySuzhouChina Institute for Complex Materials Leibniz Institute for Solid State and Materials Research DresdenDresdenGermany Institute for Materials Science and Max Bergmann Center of Biomaterials Technische Universität DresdenDresdenGermany Center for Advancing Electronics Dresden Technische Universität DresdenDresdenGermany State Key Laboratory of Crystal Materials Center of Bio&Micro/Nano Functional MaterialsShandong UniversityJinanChina Dresden Center for Computational Materials Science Technische Universität DresdenDresdenGermany Dresden Center for Intelligent Materials(GCL DCIM) Technische Universität DresdenDresdenGermany Centre of Polymer and Carbon Materials Polish Academy of SciencesZabrzePoland Institute for Complex Materials IFW DresdenDresdenGermany Institute of Environmental Technology(CEET) VŠB-Technical University of OstravaOstravaCzech Republi

Tungsten diselenide (WSe2) possesses extraordinary electronic properties forapplications in electronics, optoelectronics, and emerging exciton physics. Thesynthesis of monolayer WSe2 film is of topmost for device arrays and integratedcircuits. The monolayer WSe2 film has yet been reported by th.rmal chemicalvapor deposition (CVD) approach, and the nucleation mechanism remainsunclear. h.re, we report a pre-seeding strategy for finely regulating the nucleidensity at an early stage and achieving a fully covered film after chemicalvapor deposition growth. The underlying mechanism is heterogeneous nucle-ation from the pre-seeding tungsten oxide nanoparticles. At first, we optimized the precursor concentration for pre-seeding. Besides, we confirmed the superi-ority of the pre-seeding method, compared with three types of substrate pre-treatments, including nontreatment, sonication in an organic solvent, andoxygen plasma. Eventually, the high-quality synthetic WSe2 monolayer filmexhibits excellent device performance in field-effect transistors and photodetec-tors. We extracted th.rmodynamic activation energy from the nucleation andgrowth data. Our results may shed light on the wafer-scale production ofhomogeneous monolayer films of WSe2, oth.r 2D materials, and their van derWaals heterostructures.

关键词： activation energy chemical vapor deposition field-effect transistor pre-seeding th.rmodynamics tungsten diselenide

Design, simulation and construction of the Taban tokamak

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Plasma Science and Technology 2018年第4期20卷 112-120页

作者： h.r MIrZAEI r AMrOLLAhI Statistics of Department of Energy Engineering & Physics Amirkabir University of Tehran Tehran lran

This paper describes the design and construction of the Taban tokamak, which is located in Amirkabir University of Technology, Tehran, Iran. The Taban tokamak was designed for plasma investigation. The design, simulation and construction of essential parts of the Taban tokamak such as the toroidal field(TF) system, ohmic heating(Oh) system and equilibrium field system and their power supplies are presented. For the Taban tokamak, the toroidal magnetic coil was designed to produce a maximum field of 0.7 T at r?=?0.45 m. The power supply of the TF was a130 kJ, 0–10 kV capacitor bank. ripples of toroidal magnetic field at the plasma edge and plasma center are 0.2% and 0.014%, respectively. For the Oh system with 3 kA current, the stray field in the plasma region is less than 40 G over 80% of the plasma volume. The power supply of the Oh system consists of two stages, as follows. The fast bank stage is a 120 μF, 0–5 k V capacitor that produces 2.5 kA in 400 μs and the slow bank stage is 93 mF, 600 V that can produce a maximum of 3 kA. The equilibrium system can produce uniform magnetic field at plasma volume. This system’s power supply, like the Oh system, consists of two stages, so that the fast bank stage is 500 μF, 800 V and the slow bank stage is 110 mF, 200 V.

关键词： tokamak magnetic field equilibrium

Functional responses to deforestation in fish communities inhabiting neotropical streams and rivers

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Ecological Processes 2023年第1期12卷 716-732页

作者： Isabel Cantera Céline Jézéquel Tony Dejean Jérôme Murienne régis Vigouroux Alice Valentini Sébastien Brosse Department of Environmental Science and Policy Universitàdegli Studi di MilanoVia Celoria 2620133 MilanItaly Laboratoire Evolution et DiversitéBiologique UMR5174-UniversitéPaul SabatierCNRSIRD118 Route de Narbonne31062 ToulouseFrance SPYGEN Savoie Technolac-BP 27417 Rue du Lac Saint-André73375 Le Bourget-du-Lac CedexFrance hYDrECO Laboratoire Environnement de Petit SautB.P 82397388 Kourou CedexFrench GuianaFrance

Background Deforestation is a widespread disturbance for neotropical freshwater *** biodiversity declines have been associated with deforestation,its functional consequences for stream and river fish faunas remain poorly *** this study,we explored how deforestation affects the different facets of the functional structure of fish communities inventoried using environmental DNA metabarcoding in 64 river and 35 stream sites of French ***,we investigated how functional richness,divergence,evenness and identity of fish faunas are affected by *** We showed that anthropogenic disturbances in French Guiana are modifying the functional diversity of freshwater fish *** disturbances not only affected the amount of functional traits held by the communities but also the identity of the traits and the internal structure of the functional ***,different facets of the functional diversity supported by fish assemblages were *** streams,deforestation did not affect the overall diversity of traits but reduced functional redundancy,underlined by a shift in functional identity towards assemblages dominated by pelagic *** contrast,river fish faunas experienced a decline in functional richness,paired with shifts in functional identity and a loss of fish species with extreme *** The response to deforestation differed between streams and rivers,but it supports the hypothesis that deforestation is linked to functional changes in fish *** diminishing the range of the functions in rivers or by jeopardizing the redundancy of functions in streams,deforestation could severely hamper the functioning and stability of neotropical freshwater ecosystems.

关键词： eDNA Traits Functional space richness Divergence Evenness Identity Gold mining

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Spatio-Temporal evolutive Data Infrastructure: a Spatial Data Infrastructure for managing data flows of Territorial Statistical Information

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International Journal of Digital Earth 2017年第3期10卷 257-283页

作者： Camille Bernard Marlène Villanova-Oliver Jérôme Gensel Benoit Le rubrus Univ.Grenoble Alpes CNRSLIGGrenobleFrance

The observation of demographical,economical or environmental indicators over time through maps is *** enables analysing territories and helps stakeholders to take ***,the understanding of Territorial Statistical Information(TSI)is compromised unless comprehensive description of both the statistical methodology used and the spatial and temporal references are ***,in this paper,we stress the importance of metadata descriptions and of their quality that helps assessing data ***,time-series of such TSI are *** enable analysing a territory over a long period of time and likewise judging the effectiveness of *** light of these observations,we present Spatio-Temporal evolutive Data Infrastructure(STeDI)an innovative Spatial Data Infrastructure(SDI)that enriches the description of a Digital Earth,providing a virtual representation of territories and of their evolution through statistics and *** aims at managing a whole dataflow of multi-dimensional,multi-scale and multi-temporal TSI,from their acquisition to their dissemination to scientists and *** content of this SDI evolves autonomously thanks to automated processes and to a Web platform that help improving the quality of datasets uploaded by ***,STeDI allows visualizing up-to-date time-series reflecting the human activities on a given *** helps policy-makers in their decision-making process.

关键词： Spatial Data Infrastructure Territorial Statistical Information metadata data quality INSPIrE

Doctor communication quality and Friends' attitudes influence complementary medicine use in inflammatory bowel disease

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World Journal of Gastroenterology 2015年第12期21卷 3663-3670页

作者： réme Mountifield Jane M Andrews Antonina Mikocka-Walus Peter Bampton Department of Gastro-enterology and hepatology Flinders Medical Centre Flinders University of South Australia IBD Service Department of Gastroenterology and Hepatology and School of Medicine University of Adelaide at Royal Adelaide Hospital School of Nursing and Midwifery University of South Australia

AIM: To examine the frequency of regular complementary and alternative th.rapy(CAM) use in three Australian coh.rts of contrasting care setting and geography, and identify independent attitudinal and psychological predictors of CAM use across all coh.rts. meThODS: A cross sectional questionnaire was administered to inflammatory bowel disease(IBD) patients in 3 separate coh.rts which differed by geographical region and care setting. Demographics and frequency of regular CAM use were assessed, along with attitudes towards IBD medication and psychological parameters such as anxiety, depression, personality traits and quality of life(QOL), and compared across coh.rts. Independent attitudinal and psychological predictors of CAM use were determined using binary logistic regression analysis. rESULTS: In 473 respondents(mean age 50.3 years, 60.2% female) regular CAM use was reported by45.4%, and did not vary between coh.rts. Only 54.1%of users disclosed CAM use to their doctor. Independent predictors of CAM use which confirm those reported previously were: covert conventional medication dose reduction(P hological treatment(P rse effects of conventional medication(P = 0.043), and high.r QOL(P redictors were CAM use by family or friends(P h patient-doctor communication(P r depression scores(P reviously identified predictors of CAM use, these data show that physician attention to communication and the patient-doctor relationship is important as these factors influence CAM use. Patient reluctance to discuss CAM with physicians may promote greater reliance on social contacts to influence CAM decisions.

关键词： Complementary medicine Alternative th.rapy Th.rapy