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Reassessment of historical sections from the Paleogene marine margin of the Congo Basin reveals an almost complete absence of Danian deposits

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Geoscience frontiers 2019年第3期10卷 1039-1063页

作者： floréal Solé Corentin Noiret Delphine Desmares Sylvain Adnet Louis Taverne Thierry De Putter florias Mees Johan Yans Thomas Steeman Stephen Louwye Annelise folie Nancy J.Stevens gregg f.gunnell Daniel Baudet Nicole Kitambala Yaya Thierry Smith Royal Belgian Institute of Natural Sciences (RBINS) Operational Directorate Earth and History of Life University of Namur (UNamur) Department of Geology Rue de Bruxelles 61 Sorbonne Université UPMC Paris 06 UMR 7207 (CR2P) UMR 5554-Institut des Sciences de l'Evolution Université Montpellier Place E.Bataillon Royal Museum for Central Africa (RMCA) Geodynamics and Mineral Resources Leuvensesteenweg 13 Ghent University (UGent) Department of Geology Royal Belgian Institute of Natural Sciences (RBINS) Heritage Scientific Survey Ohio University Department of Biomedical Sciences Heritage College of Osteopathic Medicine Duke University Lemur Center Division of Fossil Primates (DFP) Centre de Recherches Géologiques et Minières (CRGM) 44 av.de la Démocratie Kinshasa Gombe

The early Paleogene is critical for understanding global biodiversity patterns in modern ecosystems. During this interval, Southern Hemisphere continents were largely characterized by isolation and faunal endemism following the breakup of Gondwana. Africa has been proposed as an important source area for the origin of several marine vertebrate groups but its Paleogene record is poorly sampled, especially from sub-Saharan Africa. To document the early Paleogene marine ecosystems of Central Africa, we revised the stratigraphic context of sedimentary deposits from three fossil-rich vertebrate localities: the Landana section in the Cabinda exclave(Angola), and the Manzadi and Bololo localities in western Democratic Republic of *** provide more refined age constraints for these three localities based on invertebrate and vertebrate faunas, foraminiferal and dinoflagellate cyst assemblages, and carbon isotope records. We find an almost complete absence of Danian-aged rocks in the Landana section, contrary to prevailing interpretations over the last half a century(only the layer 1, at the base of the section, seems to be Danian). Refining the age of these Paleocene layers is crucial for analyzing fish evolution in a global framework, with implications for the early appearance of Scombridae(tunas and mackerels) and Tetraodontiformes(puffer fishes). The combination of vertebrate fossil records from Manzadi and Landana sections suggests important environmental changes around the K/Pg transition characterized by an important modification of the ichthyofauna. A small faunal shift may have occurred during the Selandian. More dramatic is the distinct decrease in overall richness that lasts from the Selandian to the Ypresian. The Lutetian of West Central Africa is characterized by the first appearance of numerous cartilaginous and bony fishes. Our analysis of the ichthyofauna moreover indicates two periods of faunal exchanges: one during the Paleocene, where Central Africa app

关键词： Central Africa Paleogene Stratigraphy Carbon isotope Planktonic foraminifera Vertebrates

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日本九州西部赤崎组和中甑组始新世哺乳动物：初步结果及其与亚洲陆相哺乳动物分期的对比(英文)

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古脊椎动物学报 2011年第1期49卷 53-68页

作者：宫田和周富田幸光毕丛山 gregg f.gunnell 鹈饲宏明广濑浩司日本福井县立恐龙博物馆福井911-8601 日本国立科学博物馆东京169-0073 美国卡内基自然协史博物馆匹兹堡PA15213 美国密歇根大学古生物博物馆安阿伯MI48109-1079 日本天草市立御所浦白垩纪博物馆熊水866-0313

日本已知时代最早的古近纪哺乳动物化石产自九州西部熊本县天草(Amakusa)地区始新世地层赤崎(Akasaki)组以及鹿儿岛县甑岛(Koshiki Islands)相当层位的中甑(Nakakoshiki)组。初步研究显示这两个组产出的哺乳动物分异度较高,包括9个目的... 详细信息

日本已知时代最早的古近纪哺乳动物化石产自九州西部熊本县天草(Amakusa)地区始新世地层赤崎(Akasaki)组以及鹿儿岛县甑岛(Koshiki Islands)相当层位的中甑(Nakakoshiki)组。初步研究显示这两个组产出的哺乳动物分异度较高,包括9个目的至少18种动物。赤崎动物群有3种trogosine裂齿类、2种冠齿兽科全齿类、1种等脊貘科奇蹄类、2种dichobunoid偶蹄类、1种下齿兽科踝节类、1种西瓦兔猴科灵长类、1种未定食虫类以及2种可能的梳趾鼠类。中甑动物群包括1种冠齿兽科全齿类、2种小型雷兽科奇蹄类、1种高冠的下齿兽科踝节类、2种啮齿类和1种细齿兽科食肉类。这两个日本哺乳动物组合很接近早-中始新世界线。由于出现了trogosine裂齿类和雷兽,它们的时代要晚于伯姆巴动物群,极有可能与亚洲大陆阿山头期哺乳动物群相当。这两个动物群还包含了在亚洲大陆没有发现过的几个新种,并具有独特的哺乳动物组合。

关键词：日本九州始新世阿山头期赤崎组中甑组哺乳动物

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Effect of liner and porcelain application on zirconia surface structure and composition

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International Journal of Oral Science 2016年第3期8卷 164-171页

作者： Tariq f Alghazzawi gregg M Janowski Department of Prosthetic Dental Sciences College of DentistryTaibah University Department of Materials Science and Engineering School of EngineeringThe University of Alabama at Birmingham

The purpose of this study was to determine if there is an effect of liner and porcelain application （layering and pressing techniques） on the surface of yttria-stabilized tetragonal zirconia polycrystals （Y-TZP）, which were exposed to permutations of liner, layered porcelain, and pressed porcelain. Scanning electron microscope （SEM）/energy dispersive spectroscope （EDS） was used to identify changes in composition and microstructure after removing liner and porcelain with hydrofluoric acid. Simulated aging was also conducted to determine the effect of liner and porcelain on low-temperature degradation. The control group had a typical equiaxed grain structure, referred to as unaffected. When covered with liner or porcelain, some areas changed in structure and composition and were termed affected. The frequency of affected sbructure decreased when liner was covered with either layered porcelain or pressed porcelain. There were statistical differences （P〈0.05） in the composition between affected and unaffected for zirconium （layered porcelain with liner： affected = 60% （0.8%）（m/m）, unaffected = 69% （4%）, layered porcelain without liner： affected = 59% （3%）, unaffected = 65% （3%）） and oxygen （layered porcelain with liner： affected = 35% （2%）, unaffected = 26% （4%）, layered porcelain without liner： affected = 35% （3%）, unaffected = 30% （2%））. However, there were statistical differences （P〈0.05） in the composition for zirconium and oxygen of the aged layered porcelain without liner only. The liner should not be used before porcelain application, especially when using the layering technique for zirconia restorations. furthermore, pressing should be considered the technique of choice over layering.

关键词： aging coefficient of thermal expansion energy dispersive spectroscopy layering of porcelain pressing of porcelain scanning electron microscope zirconia

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Evaluation of zirconia–porcelain interface using X-ray diffraction

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International Journal of Oral Science 2015年第3期7卷 187-195页

作者： Tariq f Alghazzawi gregg M Janowski Department of Materials Science and Engineering School of Engineering The University of Alabama at Birmingham Department of Prosthetic Dental Sciences College of Dentistry Taibah University

The aim of this study was to determine if accelerated aging of porcelain veneering had an effect on the surface properties specific to a tetragonal-to-monoclinic transformation（TMT） of zirconia restorations. Thirty-six zirconia samples were milled and sintered to simulate core fabrication followed by exposure to various combinations of surface treatments including as-received（control）,hydrofluoric acid（Hf）, application of liner plus firings, application of porcelain by manual layering and pressing with firing, plus accelerated aging. The quantity of transformed tetragonal to monoclinic phases was analyzed utilized an X-ray diffractometer and one-way analysis of variance was used to analyze data. The control samples as provided from the dental laboratory after milling and sintering process had no TMT（X m5 0）. There was an effect on zirconia samples of Hf application with TMT（X m5 0.8%） and liner plus Hf application with TMT（X m5 8.7%）. There was an effect of aging on zirconia samples（no veneering） with significant TMT（X m5 70.25%）. Both manual and pressing techniques of porcelain applications reduced the TMT（manual, X m5 4.41%, pressing,X m5 11.57%）, although there was no statistical difference between them. It can be concluded that simulated applications of porcelain demonstrated the ability to protect zirconia from TMT after aging with no effect of a liner between different porcelain *** Hf treatment also caused TMT.

关键词： aging hydrofluoric acid monoclinic pressing tetragonal X-ray diffraction

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Assessing Spatial Patterns of Plant Communities at Varying Stages of Succession

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Applied Mathematics 2014年第12期5卷 1842-1851页

作者： Kevin Aagaard gregg Hartvigsen Department of Biology SUNY Geneseo Geneseo USA Department of Ecology Evolution and Natural Resources Rutgers University New Brunswick USA

There is a well known connection between the structural complexity of vegetative stands and ecosystem properties. Developing methods to quantify this structural complexity is an important goal for ecologists. We present an efficient and easily implemented field technique for calculating the shape of forest canopies, and the shape of forest stands as succession occurs, using fractal geometry. fractal geometry can be used to describe complex, non-Euclidean objects that are common in natural systems. We tested the use of this tool in 22 vegetative and forested plots in Western New York State, USA. We found an asymptotic relationship for fractal dimension (D) as a function of basal area (BA;r2= 0.68). In a randomization test to investigate the robustness of D to different tree canopy shapes, we found that D was sensitive to canopy shape switching, suggesting that the method is able to differentiate among similar forests comprised of species having different shaped crowns. We conclude that the shape is conserved in vegetative areas as they progress from one stage of succession to the next (range of mean D: 2.56 to 2.68 across stages). furthermore, we conclude that the shape filling properties—i.e., distribution of trunks and limbs in a forested area, measured as mean distance—are also conserved across vegetational chronosequences (f = 1.3189, df = 8, 3, p = 0.3341).

关键词： Ecological Succession fractal Dimension Vegetational Chronosequence Crown Shape Statistical Modeling

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利用Virtex-5 LXT器件实现集成化视频连接功能解决方案

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电子技术应用 2008年第2期34卷 7-8页

作者： gregg C.Hawkes Reed Tidwell John f.Snow Xilinx公司

当前，广播系统设计师面临严峻挑战，不断出台的视频连接功能新标准，给广播产品带来了棘手的设计挑战和紧迫的日程。

关键词：连接功能视频集成化器件广播系统设计师

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Patterns of antidepressant therapy and clinical outcomes among ischaemic stroke survivors

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Stroke & Vascular Neurology 2021年第3期6卷 384-394,I0018-I0032页

作者： Mark R Etherton Shreyansh Shah Xu Haolin Ying Xian Lesley Maisch Deidre Hannah Brianna Lindholm Barbara Lytle Laine Thomas Eric E Smith gregg C fonarow Lee H Schwamm Deepak L Bhatt Adrian f Hernandez Emily C O'Brien Neurology Massachusetts General HospitalBostonMassachusettsUSA Neurology Duke University School of MedicineDurhamNorth CarolinaUSA Duke Clinical Research Institute Duke UniversityDurhamNorth CarolinaUSA American Heart Association Inc DallasTexasUSA Clinical Neurosciences University of Calgary Cumming School of MedicineCalgaryAlbertaCanada Cardiology Ronald Reagan UCLA Medical CenterLos AngelesCaliforniaUSA Cardiovascular Medicine Brigham and Women's HospitalBostonMassachusettsUSA Cardiology Duke UniversityDurhamNorth CarolinaUSA Population Health Duke Clinical Research InstituteDurhamNorth CarolinaUSA

Background and purpose Depression is common after stroke and is often treated with antidepressant medications(AD).ADs have also been hypothesised to improve stroke recovery,although recent randomised trials were *** investigated the patterns of in-hospital AD initiation after ischaemic stroke and association with clinical and readmission *** All Medicare fee-for-service beneficiaries aged 65 or older hospitalised for ischaemic stroke in participating Get With The Guidelines-Stroke hospitals between April and December 2014 were eligible for this *** measures included days alive and not in a healthcare institution(home time),all-cause mortality and readmission within 1-year *** score(PS)-adjusted logistic regression models were used to evaluate the associations between AD use and each outcome *** also compared outcomes in patients prescribed selective serotonin reuptake inhibitors(SSRIs)AD versus those prescribed non-SSRI *** Of 21805 AD naive patients included in this analysis,1835(8.4%)were started on an AD at *** started on an AD had higher rates of depression and prior ischaemic stroke,presented with higher admission National Institutes of Health Stroke Scale score and were less likely to be discharged ***,patients started on an SSRI had lower rates of discharge to *** for stroke severity,patients started on an AD had worse all-cause mortality,all-cause readmission,major adverse cardiac events,readmission for depression and decreased ***,AD use was also associated with an increased risk for the sepsis,a falsification endpoint,suggesting the presence of residual *** Patients with ischaemic stroke initiated on AD therapy are at increased risk of poor clinical outcomes and readmission even after PS adjustment,suggesting that poststroke depression requiring medication is a poor prognostic *** research is needed to explore

关键词： prescribed admission founding

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AES音频数据流之间的异步采样率转换

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世界电子元器件 2007年第9期 36-36,38-39页

作者： gregg C.Hawkes Read Tidwell John f.Snow Xilinx公司

数字视频和音频技术的广泛使用和不断革新，推动了音／视频广播（AVB）设备的快速发展。今天的AVB设备需要更高的图像质量、分辨率、更高的带宽和更多的音／视频处理通道，并且需要将从前彼此独立但实际上相互关联的功能（例如HD—SDI... 详细信息

数字视频和音频技术的广泛使用和不断革新，推动了音／视频广播（AVB）设备的快速发展。今天的AVB设备需要更高的图像质量、分辨率、更高的带宽和更多的音／视频处理通道，并且需要将从前彼此独立但实际上相互关联的功能（例如HD—SDI、音频多路传输和解复用，以及异步采样率转换（ASRC））组合在一起。

关键词：采样率转换音频技术异步数据流 AES 数字视频视频广播图像质量

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机载摄象光谱仪:一种新的遥感工具

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半导体光电 1985年第4期 28-32页

作者： gregg VANE ,ALEXANDER f.H.GOETZ ,JOHN B.WELLMAN ,杨成珠

本文叙述了第一个新型遥感仪器机载摄象光谱仪。在科学应用领域它首次使用了二维集成红外面阵列。这种仪器能同时摄取32个横向跟踪的象素,且每个象素介于1.2至2.4μm波长区内128光谱带中。仪器瞬时视场(IfOV)每象素1.9毫弧,光谱取样间隔... 详细信息

本文叙述了第一个新型遥感仪器机载摄象光谱仪。在科学应用领域它首次使用了二维集成红外面阵列。这种仪器能同时摄取32个横向跟踪的象素,且每个象素介于1.2至2.4μm波长区内128光谱带中。仪器瞬时视场(IfOV)每象素1.9毫弧,光谱取样间隔9.6nm。计划1985年把探测器阵列规模由目前的32×32元HgCd-Te-CCD阵列扩大到64×64元阵列。目前正用这种仪器积极地收集科学和工程数据。

关键词：光谱仪仪器狭缝分光计光学式分析仪器摄象有效焦距

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Assembly of JAZ–JAZ and JAZ–NINJA complexes in jasmonate signaling

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Plant Communications 2023年第6期4卷 296-312页

作者： X.Edward Zhou Yaguang Zhang Jian Yao Jie Zheng Yuxin Zhou Qing He Javier Moreno Vinh QLam Xiaoman Cao Koichi Sugimoto Leidy Vanegas-Cano Leena Kariapper Kelly Suino-Powell Yuanye Zhu Scott Novick Patrick R.Griffin feng Zhang gregg A.Howe Karsten Melcher Department of Structural Biology Van Andel InstituteGrand RapidsMI 49503USA Key Laboratory of Pesticide College of Plant ProtectionNanjing Agricultural UniversityNanjingChina MSU-DOE Plant Research Laboratory Michigan State UniversityEast LansingMI 48824USA Department of Molecular Medicine UF Scripps Biomedical ResearchJupiterFL 33458USA Plant Resilience Institute Michigan State UniversityEast LansingMI 48824USA Department of Biochemistry and Molecular Biology Michigan State UniversityEast LansingMI 48824USA Present address:Institute of Botany Jiangsu Province and Chinese Academy of SciencesNanjing 210014China Present address:Tsukuba-Plant Innovation Research Center University of TsukubaTsukubaIbaraki 305-8572Japan

Jasmonates(JAs)are plant hormones with crucial roles in development and stress *** activate MYC transcription factors by mediating the proteolysis of MYC inhibitors called JAZ *** the absence of JA,JAZ proteins bind and inhibit MYC through the assembly of MYC–JAZ–Novel Interactor of JAZ(NINJA)–TPL repressor ***,JAZ and NINJA are predicted to be largely intrinsically unstructured,which has precluded their experimental structure *** a combination of biochemical,mutational,and biophysical analyses and Alphafold-derived Colabfold modeling,we characterized JAZ–JAZ and JAZ–NINJA interactions and generated models with detailed,high-confidence domain *** demonstrate that JAZ,NINJA,and MYC interface domains are dynamic in isolation and become stabilized in a stepwise order upon complex *** contrast,most JAZ and NINJA regions outside of the interfaces remain highly dynamic and cannot be modeled in a single *** data indicate that the small JAZ Zinc finger expressed in Inflorescence Meristem(ZIM)motif mediates JAZ–JAZ and JAZ–NINJA interactions through separate surfaces,and our data further suggest that NINJA modulates JAZ *** study advances our understanding of JA signaling by providing insights into the dynamics,interactions,and structure of the JAZ–NINJA core of the JA repressor complex.

关键词： JAZ protein NINJA Alphafold Colabfold MYC hydrogen-deuterium exchange

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