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Vegetation changes across the Eocene-Oligocene transition:Global signals vs. regional development

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Science China Earth Sciences 2024年第9期67卷 2937-2952页

作者： Mengxiao WU lutz KUNZMANN Shufeng LI Vasilis TEODORIDIS Zhekun ZHOU Tao SU CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of Sciences Senckenberg Natural History Collections Dresden Department of Biology and Environmental Studies Faculty of EducationCharles University State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Institute of Sedimentary Geology Chengdu University of Technology

The Eocene-Oligocene transition(EOT) marked a rapid global cooling event, often considered as the beginning of the modern icehouse world. Influenced by various factors, including tectonic activity and paleogeographic settings, the terrestrial records indicate a diverse response of fauna and vegetation to this global event. We examined nine macrofossil assemblages from seven fossil localities on the southeastern margin of the Tibetan Plateau and from the mid-latitudinal Europe ranging from the latest Bartonian and Priabonian(37.71–33.9 Ma) to the Rupelian(33.9–27.82 Ma). Our aims were to trace and compare the vegetation history of both regions in the late Eocene and early Oligocene. The results show that both regions experienced changes in vegetation composition in response to climate change, characterized by a decrease in the percentages of broad-leaved evergreen elements and distinctive changes in general vegetation types. A general change in the overall vegetation type from subtropical broad-leaved evergreen forests in the late Eocene to temperate broad-leaved mixed deciduous evergreen forests, or mixed mesophytic forests, in the early Oligocene is recognized in both regions. The results indicate a clear change in leaf architecture, leaf margin states, and secondary venation types in the mid-latitudinal Europe, while the results from the southeastern margin of the Tibetan Plateau show a distinct reduction in leaf size. Our data suggest that both global and regional factors played key roles in shaping the vegetation in the two regions.

关键词： Eocene-Oligocene transition Plant fossil Paleoclimate Leaf architecture Biodiversity

Simulation of the SMILE Soft X-ray Imager response to a southward interplanetary magnetic field turning

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Earth and Planetary Physics 2024年第1期8卷 39-46页

作者： Andrey Samsonov Graziella Branduardi-Raymont Steven Sembay Andrew Read David Sibeck lutz Rastaetter Mullard Space Science Laboratory University College LondonDorking RH56NTUK Leicester University Leicester LE17RHUK Goddard Space Flight Center National Aeronautics and Space AdministrationGreenbeltMD 20771USA

The Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)Soft X-ray Imager(SXI)will shine a spotlight on magnetopause dynamics during magnetic *** simulate an event with a southward interplanetary magnetic field turning and produce SXI count maps with a 5-minute integration *** making assumptions about the magnetopause shape,we find the magnetopause standoff distance from the count maps and compare it with the one obtained directly from the magnetohydrodynamic(MHD)*** root mean square deviations between the reconstructed and MHD standoff distances do not exceed 0.2 RE(Earth radius)and the maximal difference equals 0.24 RE during the 25-minute interval around the southward turning.

关键词： magnetopause magnetic reconnection solar wind charge exchange southward interplanetary magnetic field numerical modeling Solar wind Magnetosphere Ionosphere Link Explorer(SMILE) Soft X-ray Imager

始新世-渐新世气候转折期的植被变化:全球信号与区域特征

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中国科学:地球科学 2024年第9期54卷 2989-3004页

作者：吴梦晓 lutz KUNZMANN 李树峰 Vasilis TEODORIDIS 周浙昆苏涛中国科学院西双版纳热带植物园中国科学院热带森林生态学重点实验室 Senckenberg Natural History Collections Dresden Department of Biology and Environmental Studies Faculty of EducationCharles University 成都理工大学油气藏地质及开发工程全国重点实验室成都理工大学沉积地质研究院

始新世-渐新世气候转折期(Eocene-Oligocene Transition, EOT)是一次全球快速变冷事件.这次事件是现代冰室气候的开端,受到构造活动、海陆位置和古地理位置等多重因素的影响,陆地生态系统对这一全球事件的响应具有空间异质性.本研究对... 详细信息

始新世-渐新世气候转折期(Eocene-Oligocene Transition, EOT)是一次全球快速变冷事件.这次事件是现代冰室气候的开端,受到构造活动、海陆位置和古地理位置等多重因素的影响,陆地生态系统对这一全球事件的响应具有空间异质性.本研究对上巴顿阶和普利亚本阶(37.71～33.9Ma)至吕珀尔阶(33.9～27.82Ma)青藏高原东南缘和欧洲中纬度地区7个化石产地的9个植物群开展研究,比较晚始新世和早渐新世这两个地区的植被类型和叶结构特征变化.结果表明:两个研究区域的植被组成均响应了气候变化,主要表现为常绿阔叶成分比例下降和植被类型的改变.两个研究区域的植被类型均经历了从晚始新世亚热带常绿阔叶林向早渐新世温带落叶阔叶林或混交中生林的转变.对叶结构特征的研究表明,欧洲中纬度地区的叶缘特征和二级脉类型发生了显著变化,而青藏高原东南缘的叶面积明显减小.本研究表明,全球和区域因素对于研究地区植被的演化发挥着关键作用.

关键词：始新世-渐新世气候转折期植物化石古气候叶结构生物多样性

Photoelectrochemical Iron-Catalyzed C(sp^(3))-H Borylation of Alkanes in a Position-Selective Manner

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CCS Chemistry 2024年第6期6卷 1430-1438页

作者： Wen Wei Bin Wang Simon L.Homölle Jinbin Zhu Yanjun Li Tristan von Münchow Isaac Maksso lutz Ackermann Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen37077 Göttingen

Catalytic C-H borylation is of prime topical importance,since easily available feedstock chemicals can thereby be transformed into valuable transient functional groups in the absence of directing ***,we disclose an iron-catalyzed C(sp^(3))-H borylation of simple,non-prefunctionalized alkanes,providing access to value-added products in a single step by means of *** power of merging photo-and electrochemistry was mirrored by ample scope and exceedingly mild reaction ***,an outstanding position-selectivity in favor of primary C(sp^(3))-H proved viable within the photoelectrochemical borylation through a chemo-selective anodic overoxidation *** ferro-photoelectrochemistry strategy avoids toxic precious transition metals,enabling C(sp^(3))-H borylations in a site-selective fashion.

关键词： photoelectrocatalysis C(sp^(3))-H borylation iron catalysis position-selectivity chlorine radical

退火热处理对增材制造AlSi10Mg合金宏观和微观变形行为的影响

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金属学报 2024年第8期60卷 1091-1099页

作者：张星星 lutz Andreas 甘为民 MAAWAD Emad KRIELE Armin 中国科学院高能物理研究所多学科研究中心北京100049 Mercedes Benz AG Research and Development DepartmentLeibnizstr.271032 BöblingenGermany Institute of Materials Physics Helmholtz-Zentrum HereonMax-lanck-Str.121502 GeesthachtGermany German Engineering Materials Science Centre(GEMS)at Heinz Maier-Leibnitz Zentrum(MLZ) Helmholtz-Zentrum Hereon85748 GarchingGermany

增材制造AlSi10Mg合金存在显著的残余应力,对零件的形状尺寸精度、服役安全性和抗腐蚀性能等产生不利影响。在实际应用中,对残余应力敏感的应用需采用去应力退火以消除残余应力。然而,目前对增材制造AlSi10Mg合金退火后力学特性的理解... 详细信息

增材制造AlSi10Mg合金存在显著的残余应力,对零件的形状尺寸精度、服役安全性和抗腐蚀性能等产生不利影响。在实际应用中,对残余应力敏感的应用需采用去应力退火以消除残余应力。然而,目前对增材制造AlSi10Mg合金退火后力学特性的理解还停留在宏观层面。为了更深入地揭示其微观力学行为与内在机制,本工作利用同步辐射X射线衍射技术,对合金进行原位变形研究,分析Al和Si相的晶格应变应力演化,明确各物相对合金加工硬化率的具体贡献,并对位错密度的演变进行了量化分析,从而阐明了退火热处理对增材制造AlSi10Mg合金载荷传递行为与位错行为的影响。

关键词：同步辐射X射线衍射原位变形增材制造 AlSi10Mg合金热处理

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Influence of broken kernels content on soybean quality during storage

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Grain & Oil Science and Technology 2024年第2期7卷 105-112页

作者： Lazaro da Costa Correa Canizares Cesar Augusto Gaioso Newiton da Silva Timm Silvia Leticia Rivero Meza Adriano Hirsch Ramos Maurício de Oliveira Everton lutz Moacir Cardoso Elias Department of Agroindustry Science and Technology Federal University of PelotasPelotasRio Grande do Sul 96010-900Brazil Information and Communication Technological Axis Federal Institute of EducationScienceand Technology FarroupilhaCampus PanambiPanambiRio Grande do Sul 98280-000Brazil

Although it is recognized that the post-harvest system is most responsible for the loss of soybean quality,the real impact of this loss is still *** regulation allows 15%and 30%of broken soybean for group I and group II(quality groups),***,the industry is not informed about the loss in the quality parameters of soybeans and its impacts during long-term ***,the objective was to evaluate the effect of the breakage kernel percentage of soybean stored for 12 *** of 15% of breakage kernels did not affect soybean ***,content of 30% of breakage kernels affected significantly soybean quality,which was evidenced by the increase of up to 75% in moldy soybeans,72% in acidity,50% in leached solids,27% in electrical conductivity,and the decrease of up to 12% in soluble protein,6.4% in germination and 3.5% in thousand kernel weight after 8 months of *** the legislation establishes a percentage limit,it is recommended to store soybeans with up to 15% breakage *** the contrary,values higher than that can cause a significant reduction in soybean quality,resulting in commercial losses.

关键词： Soybean quality Breakage kernels Storage problems Grain defects Quality parameters

Surgical approach affecting long-term urinary continence status after robot-assisted laparoscopic prostatectomy prospectively evaluated using self-reported functional status(Expanded Prostate Cancer Index Composite,EPIC-26)

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基于XIAO ESP32S3 Sense开发板的摄像火箭

当代泌尿学（英文） 2024年第1期18卷 61-65页

作者： Mathias Reichert Ame Strauß Joost Wilhelm Voß Hans Christoph von Knobloch Hannah Maria Neuenhofer Annemarie Uhlig lutz Trojan Mirjam Naomi Mohr Department of Urology University Medical CenterGoettingenGermany Department of Pediatrics University HospitalBonnGermany

Purpose:The aim of the study was to examine the influence of the surgical approach for robot-assisted laparoscopic prostatectomy(RALP)on long-term urinary continence status in the era of self-reported functional status measures using the Expanded Prostate Can-cer Index Composite 26.Materials and methods:This is a prospective evaluation of 232 patients undergoing RALP between September,2019 and September,*** continence status and postoperative incontinence(pad usage)were evaluated 12 months after RALP using Expanded Prostate Cancer Index Composite 26 *** were categorized according to their surgical approach and outcome into the following groups:successful nerve sparing(NS),primarily without nerve sparing(***),and no nerve sparing by secondary resection(NNS by SR).The median levels of their questionnaire outcomes were evaluated and compared using the Wilcoxon rank sum test with continuity correction.Results:Urinary continence status 12 months after RALP differed significantly between the NS and ***(p=0.0071)and the NS and NNS by SR(p=0.0076)*** was no significant difference between the *** and NNS by SR(p=0.53)*** usage 12 months after RALP had no significant difference with regard to SR of the neurovascular bundle(p=0.14).Conclusions:Patient-reported outcomes of long-term urinary continence status seem to show no difference in postoperative conti-nence,regardless of whether a non-nerve-sparing result was planned or reached through ***,preservation of neurovascular bundle seems to lead to better long-term continence rates.

关键词： Expanded Prostate Cancer Index Composite 26 Nerve sparing Prostate cancer Robot-assisted radical prostatectomy Surgical approach Urinary incontinence

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无线电 2024年第2期 48-49页

作者： [美]Justin lutz 哈爽(译) 不详

几个月前,我购买了一个Estes AstroCam,它是一款可以高空拍摄的火箭(模型),从火箭的角度观看发射过程真是太酷了!它引发了我强烈的兴趣,让我有了自己制作一个火箭摄像装置的冲动,这样我还可以添加额外的功能(例如测量高度、温度等)。

关键词：测量高度开发板 S3 火箭

Electrolyser design controls position-divergent C–H carboxylation

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Science China Chemistry 2023年第6期66卷 1549-1550页

作者： Max Surke Rong Zhao lutz Ackermann Institut für Organische und Biomolekulare Chemie Georg-August-Universitot GottingenTammannstraBe 237077 GotingenGermany Wohler Research Institute for Sustainable Chemistry Georg-August-Universitot GottingenTammannstraBe 237077 GotingenGermany German Center for Cardiovascular Research(DZHK) Potsdamer StraBe 5810785 BerlinGermany

In recent years,molecular electrochemistry has undergone a remarkable renaissance to surface as a sustainable strategy for organic synthesis and catalysis,gaining considerable momentum by the use of renewable forms of energy[1,2].Modern organic electrochemistry has the unique power to control chemo-,regio-,and position-selectivities through the judicious choice of the electrode material,the applied potential or an additional catalyst,among others[1,2].Despite the major advances in molecular electrochemistry,these approaches continue to predominantly rely on non-renewable fossil resources.

关键词： electrochemistry momentum catalysis