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10,000 years of climate control over carbon accumulation in an Iberian bog(southwestern Europe)

Geoscience Frontiers 2019年第4期10卷 1521-1533页

作者： Xabier Pontevedra-Pombal Daniel Castro Martín Souto Isabel Fraga William H. Blake Maarten Blaauw José A. López-Sáez Sebastián Pérez-Díaz Marcos Valcárcel Eduardo García-Rodeja Dpto.Edafoloxía e Química Agrícola Fac.BioloxíaUniversidade de Santiago de CompostelaGaliciaSpain Dpto.Botánica Fac.BioloxíaUniversidade de Santiago de CompostelaGaliciaSpain School of Geography Earth and Environmental SciencesUniversity of PlymouthUK School of Natural and Built Environment Queen’s University BelfastNorthern IrelandUK GI Arqueobiología Instituto de HistoriaCCHS - CSICMadridSpain Dpto.Xeografía Fac.Xeografía e HistoriaUniversidade de Santiago de CompostelaGaliciaSpain

The northwest region of the Iberian Peninsula is home to a unique ecosystem of bogs,which are particularly sensitive to projected climate cha *** this context,the rate of carbon(C)accumulation in Chao de Veiga *** intact raised bog,was *** in the accumulation rate over the past10 millennia were determined in a peat core of 847 cm in depth,with a high mean rate of peat growth(11 yr cm^-1,0.09 cm yr^-1).An age-depth model was generated from 22 14C dates and fallout ***,stratigraphical and physico-chemical data confirmed the existence of a single cycle of peat formation throughout the Holocene and the formation of ombrotrophic peat 9500 years *** total mean C content was 50.2%,and over 10 millennia 583 kg C m^-2 accumulated at a mean rate of 35.3 g C m^-2 yr^-1,with a long-term(apparent)rate of carbon accumulation in the catotelm of59.9 g C m^-2 yr^-*** values are much higher than reported for other Iberian peatlands and are amongst the highest documented for peatlands in the northern *** dynamics of C accumulation and other measured parameters reveals important variations throughout the *** could be associated with the main climatic events described in the northern hemisphere and are highly consistent with models established for northern *** Chao de Veiga Mol raised bog is unique and of great potential value for carrying out high resolution palaeoenvironmental studies,especially in relation to regional and Iocal modulations in southern Europe.

关键词： Peatland Geochemistry Holocene Climate change Palaeoenvironmental reconstruction

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Neurotrophic and metabotrophic potential of nerve growth fac.or and brain-derived neurotrophic fac.or: Linking cardiometabolic and neuropsychiatric diseases

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World Journal of Pharmacology 2013年第4期2卷 92-99页

作者： Stanislav Yanev Luigi Aloe Marco Fiore George N Chaldakov Institute of Neurobiology Department of Drug Toxicology Bulgarian Academy of Sciences Institute of Cellular biology and Neurobiology National Research Council Laboratory of Cell biology Department of Anatomy and Histology Medical University

One of biggest recent achievements of neurobiology is the study on neurotrophic fac.ors. The neurotrophins are exciting examples of these fac.ors. They belong to a family of proteins consisting of nerve growth fac.tor （NGF）, brain-derived neurotrophic fac.or （BDNF）, neurotrophin-3 （NT-3）, NT-4/5, NT-6, and NT-7. Today, NGF and BDNF are well recognized to mediate a diz-zying number of trophobiological effects, ranging from neurotrophic through immunotrophic and epitheliotro-phic to metabotrophic effects. These are implicated in the pathogenesis of various diseases. In the same vein, recent studies in adipobiology reveal that this tissue is the body’s largest endocrine and paracrine organ producing multiple signaling proteins collectively termed adipokines, with NGF and BDNF being also produced from adipose tissue. Altogether, neurobio-logy and adipobiology contribute to the improvement of our knowledge on diseases beyond obesity such as cardiometabolic （atherosclerosis, type 2 diabetes, and metabolic syndrome） and neuropsychiatric （e.g. , Alzheimer’s disease and depression） diseases. The present review updates evidence for （1） neurotrophic and metabotrophic potentials of NGF and BDNF linking the pathogenesis of these diseases, and （2） NGF- and BDNF-mediated effects in ampakines, NMDA receptor antagonists, antidepressants, selective deacetylase inhibitors, statins, peroxisome proliferator-activated receptor gamma agonists, and purinergic P2X3 recep-tor up-regulation. This may help to construct a novel paradigm in the feld of translational pharmacology of neuro-metabotrophins, particularly NGF and BDNF.

关键词： Neurotrophins Metabotrophins Adipose tissue Adipokines Disease Therapy

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A New Focus of Ruin Problem

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通讯和计算机（中英文版） 2011年第4期8卷 318-323页

作者： Almaraz Luengo Elena Department of Statistic and Operational Research Fac. Sciences Mathematics University Complutense of Madrid Madrid 28040 Spain

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First Order Stochastic Dominance in Truncated Pareto Distributions

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通讯和计算机（中英文版） 2011年第3期8卷 222-224页

作者： Almaraz Luengo Elena Department of Statistic and Operational Research Fac. Sciences Mathematics University Complutense of Madrid Madrid 28040Spain

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UNIFORMITY ASSESSMENT OF CARBON FIBRES DISPERSION IN CEMENT PASTE BY IMPEDANCE MEASUREMENTS

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Journal of Wuhan University of Technology(Materials Science) 1999年第1期14卷 52-57页

作者： Shui, Zhonghe Stroeven, Piet Wuhan Univ Technol Coll Mat Sci & Technol Wuhan 430070 Peoples R China Delft Univ Technol Fac Civil Engn NL-2600 AA Delft Netherlands

An alternating current was applied to measure the impedance of a hardened cement paste with various contents of carbon fibres. When the free water content in the hardened cement paste is 90%-98%, and the measuring frequency 500 Hz, an approximate linear relationship was found between fibre content and impedance of the composite. Based on this relationship, a new attempt was made to evaluate the dispersion uniformity of carbon fibres in cement paste by impedance measurement. The standard deviation S and the coefficient of vriation S/X over bar //i of impedance of the fibre-cement specimens randomly taken locating in different points were used as main parameters for the uniformity assessment. As a case, four different mixing processes were designed for dispersing carbon fibres into the cement paste. The results demonstrate that the relative longer mixing time increases the dispersion uniformity of carbon fibres in cement paste, and the addition of the water reducer dramatically improves the uniformity due to the change of the fluidity of the paste. The ground fly ash can increase the uniformity to a certain extent. (Author abstract) 6 Refs.

关键词： carbon fibers uniformity assessment fiber concrete

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Ti6Al4V合金超声深滚层的组织结构特征

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稀有金属材料与工程 2010年第10期39卷 1754-1758页

作者：李礼朱有利 Acad Armored Force Engn Fac Remfg Engn Beijing 100072 Peoples R China

采用超声深滚技术对Ti6Al4V合金进行表面机械强化处理,使用扫描电镜、硬度分析、X射线衍射和透射电镜等分析手段研究超声深滚处理Ti6Al4V合金表面层的组织结构特征。结果表明:超声深滚处理后,材料表层组织严重细化,形成了纳米结构层,表... 详细信息

采用超声深滚技术对Ti6Al4V合金进行表面机械强化处理,使用扫描电镜、硬度分析、X射线衍射和透射电镜等分析手段研究超声深滚处理Ti6Al4V合金表面层的组织结构特征。结果表明:超声深滚处理后,材料表层组织严重细化,形成了纳米结构层,表面晶粒尺寸小于20nm。晶粒细化层的深度约为0.15mm,在0.15mm深度处,虽然晶界结构保持完整但晶粒内部位错密度增加。分析了组织结构细化对于改善疲劳性能的意义。

关键词： Ti6Al4V合金超声组织结构特征 Treated Deep 晶粒细化硬度分析强化处理表面层位错密度透射电镜射线衍射扫描电镜疲劳性能晶粒尺寸结构细化结构保持表层组织结构层纳米

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An Sm-Nd isotopic dating study of the Archean Kongling Complex in the Huangling area of the Yangtze Craton

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Chinese Science Bulletin 1998年第14期43卷 1187-1191页

作者： Ling, WL Gao, S Zheng, HF Zhou, L Zhao, ZB China Univ Geosci Fac Geosci Wuhan 430074 Peoples R China Peking Univ Dept Geol Beijing 100871 Peoples R China

Sm Nd isotopic compositions of associated amphibolites, TTG gneisses and granitic gneisses from the Archean Kongling Complex of the Yangtze Craton, South China are systematically analyzed. The results show that the amphibolites and TTG gneisses have a similar age of ca. 2 700 Ma, which well agrees with zircon U Pb dating of previous studies. However, their ε Nd ( t ) are different, suggestive of possible dissimilarity in source composition.

关键词： Yangtze Craton Kongling Complex Archean high grade terrain Sm Nd isotopic chronology crust mantle evolution.

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手术成功治疗妊娠期原发性肝脏胃泌素瘤:病例报道

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世界核心医学期刊文摘（妇产科学分册） 2005年第4期1卷 16-17页

作者： Delgado J. Delgado B. Sperber A.D. Fich A. 高雪莲 Dept. Gastroenterol. Dept. Pathol. Soroka Med. Ctr. Fac. of Hlth. Sci. Ben-Gurion University of the Negev Beer’Sheva Israel

Primary neuroendocrine tumors of the liver, particularly gastrinomas, are exceptionally rare. We present a case of a sporadic primary liver gastrinoma in a young woman in whom the definitive diagnosis was reached, and... 详细信息

关键词：胃泌素瘤神经内分泌肿瘤

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Impact of Nitrogen Fertilization on the Oil, Protein, Starch, and Ethanol Yield of Corn （Zea mays L,） Grown for Biofuel Production

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Journal of Life Sciences 2011年第12期5卷 1013-1021页

作者： Roland Ahouelete Yaovi Holou Valentin Kindomihou University of Missouri Delta Research Center P.O. Box 160 Portageville MO 63873 USA Monsanto Company 80ON. Lindbergh Blvd. Mail Zone Q4B/Q420E-A St. Louis MO 63167 USA Laboratory of Applied Ecology Fac. of Agronomic Sci. University of Abomey-Calavi Cotonou O1 BP 526 Benin

Nitrogen fertilization is one of the greatest challenges associated with the production of biofuel from corn grain. The objective of this research was to determine the effect of N fertilization on the content and yield of oil, protein, and starch in corn grain. The project was done in Southeast Missouri （USA）, from 2007 to 2009 in a silt loam soil. Corn grain contains 3.8-4.2% oil, 6.7%-8.9% protein, 68.0%-70.4% extractable starch, and 76.0%-77.7% total starch. The total starch yield ranged from 2.8 to 7.8 ***1 whereas the extractable starch varied between 2.5 to 7.1 mg-ha1. As the N rate went up, the oil and starch content of the grain decreased, whereas the protein content and the protein, starch, and oil yields increased, reaching their maximum at the N rate corresponding to 179.0 kg ***~. The potential ethanol yield varied between 616.2 and 7,035.1 L-ha1 depending on the method of conversion of the starch into ethanol, the year and the N rate （P 〈 0.0001）. The negative correlation between N fertilization rate and starch content suggested that when farmers add too much N to their soil to increase grain yield, they reduce the starch content in those grains, and consequently the conversion into bioethanol. Therefore, for biofuel production to be beneficial for both farmers and the power plant owners, an agreement needs to be made with regard to the use of fertilizers.

关键词： Starch oil protein corn kernel biofuel ethanol nitrogen

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High-resolution patterns of palaeoenvironmental changes during the Little Ice Age and the Medieval Climate Anomaly in the northwestern Iberian Peninsula

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Geoscience Frontiers 2020年第5期11卷 1461-1475页

作者： Daniel Castro Martin Souto Maria Isabel Fraga Eduardo Garcia-Rodeja Sebastian Perez-Diaz Jose Antonio Lopez Saez Xabier Pontevedra-Pombal Dpto.Botanica Fac.BioloxiaUniversidade de Santiago de CompostelaGaliciaSpain Dpto.Edafoloxia e Quimica Agricola Fac.BioloxiaUniversidade de Santiago de CompostelaGaliciaSpain Dpto.Geografia Urbanismo y Ordenacion Del TerritorioETS CaminosCanales y PuertosUniversidad de CantabriaSpain GI Arqueobiologia Instituto de HistoriaCCHS–CSICMadridSpain

to identify plant macrofossils,estimate peat humification and calculate hydroclimatic indices based on current bog species,with the overall aim of determining the climate conditions associated with evolution of the bog during the Medieval Climate Anomaly and the Little Ice *** proxies,together with historical and climate data,proved to be good indicators of the changes in bog surfac. ***:of the core led to identification of 9 different periods:two corresponding to the so-called Medieval Climate Anomaly(930 to 1345 AD,1075–665 calibrated years before present[*** BP]);four corresponding to the Little Ice Age(1345 to 1905 AD;665–105 cal yr BP);and three corresponding to the last century(1905 to 2000 AD).The findings revealed a generally dry climate that lasted until the 14th century,followed by a transition to a long period with a more humid,but characteristically very variable climate,which ended at the beginning of the 20th century and was followed by a rapid transition to more humid conditions and finally,a change to drier *** Medieval Climate Anomaly was indicated by the abundance of dry-adapted mosses(Leucobryum glaucum,Hypnum cupressiforme)and characterized by warm dry conditions and high levels of peat humification,with alternating wet *** LIA period was dated by a large abundance of Sphagnum species(an indicator of wetness)and a gradual increase in the humification ***,four different climate phases were differentiated in this ***-resolution reconstruction of the evolution of the CVM bog and the multiproxy approach have together enabled a more detailed identification of climatic variations in this area,which are generally consistent with the global models,as well as better definition of the elusive climatic oscillations in the last millennium and confirmation of the importance of local modulation of global *** study provides new information and a detailed chronology of climatic events that will hel

关键词： Last millennium Raised bog Plant macrofossil Humification analysis Southwest Europe Climate change

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