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14篇 您的检索式:作者名="Melchin"
    题名 作者 年代 出处 被引量
1The Global Boundary Stratotype Section and Point (GSSP) for the base of the Hirnantian Stage (the uppermost of the Ordovician System)显示文摘Xu Chen Jiayu Rong Junxuan Fan Renbin Zhan Charles E. Mitchell David A. T. Harper Michael J. Melchin Ping'an Peng Stan C. Finney Xiaofeng Wang 2006Episodes2006,29,3:61
2Biostratigraphy and geography of the Ordovician-Silurian Lungmachi black shales in South China显示文摘Based on the new material of seven Ordovician-Silurian boundary sections investigated recently, together with previously published data, we analyze the temporal and spatial distributions of the Lungmachi black shales, a key petroleum source bed widely distributed in South China. The Lungmachi black shales range in age from the Normalograptus persculptus Biozone of the uppermost Ordovician to the Spirograptus guerichi Biozone of the lower Telychian, and ten graptolite biozones can be recognized within this unit. The basal and upper contacts of the Lungmachi black shales are diachronous. The basal contact ranges from the N. persculptus to the C. cyphus biozones, a span of five graptolite biozones over two stages. The upper contact ranges from the D. pectinatus-M. argenteus Biozone to the Spirograptus guerichi Biozone, which spans four graptolite biozones over two stages. The Yichang Uplift resulted in the formation of the Hunan-Hubei Submarine High in the border area of Hubei, Hunan, and Chongqing. This is supported by a break in sedimentation in this area spanning all or part of the Hirnantian, and in many areas extending into the underlying Katian and overlying Rhuddanian. Comparison of the distribution of the Katian to Rhuddanian strata in this area indicates a growth and subsequent reduction in area of the Hunan-Hubei Submarine High particularly in the Hirnantian to early Rhuddanian. This may partly represent the influence of the process of formation and melting of ice sheet in Ordovician South Pole and consequent sea level change.FAN JunXuan Michael J MELCHIN CHEN Xu WANG Yi ZHANG YuanDong CHEN Qing CHI ZhaoLi CHEN Feng 2011Science China Earth Sciences2011,54,12:24
3湖北恩施太阳河奥陶纪-志留纪之交沉积间断的研究显示文摘依据湖北恩施太阳河灯草坪奥陶系—志留系剖面的生物地层学和岩石学的研究,该剖面的沉积间断发生在Paraorthograptus pacificus带至Coronograptus cyphus带之间,共缺失5个笔石带。奥陶系、志留系之间黏土岩矿物分析显示,在奥陶系、志留系之间出现有高岭土,推断在其间可能上升为陆地。具体演变过程为:在晚奥陶世晚期P.pacificus带之前,该区属于黑色笔石页岩沉积环境;在P.pacificus带(也可能略早),该区抬升,形成水下高地,其沉积环境达到了水下风化面,出现了生物扰动现象,并伴有一定的水下动力作用;至奥陶纪最晚期—志留纪早期,该区进一步抬升,可能上升为陆地;至志留纪早期C.cyphus带,该区快速下降,恢复到黑色笔石页岩沉积环境。凯迪晚期的全球海平面下降和志留纪早期'华夏古陆'不断向西及西北扩展的耦合作用是导致该区上升为陆地的主要因素。对整个扬子地区奥陶纪-志留纪之交沉积间断的综合分析需要在多个剖面开展进一步的研究工作。王怿 樊隽轩 张元动 徐洪河 M.J. Melchin 2011地层学杂志2011,35,4:21
4Report of the restudy of the defined global stratotype of the base of the Silurian System显示文摘Jiayu Rong Michael Melchin S. Henry Williams Tatyana N. Koren Jacques Verniers 2008Episodes2008,31,3:11
5物种分布模型在古生物学研究中的应用显示文摘物种分布模型(Species distribution models,SDMs)是基于物种的生态位要求,通过将物种已知的分布数据和对应地区的环境数据联系起来,以预测该物种在不同时间和空间下的地理分布的一种数学工具。它为地史时期生物地理分布的重建、生物生态特征的分析及生物与地球环境协同演化研究等提供了一种新的途径。此方法具有研究精度高、预测效果好及应用广泛等优点,尤其适合开展高精度的古生物地理、古生态及生物宏演化等相关研究。文章着重介绍物种分布模型的基本原理及建模流程,在此基础上以笔石种Tang yagraptus typicus Mu作为建模实例进一步说明物种分布建模的详细步骤,最后概述此方法在古生物研究中的适用性及存在的问题。张琳娜 樊隽轩 Melchin M J 陈清 Wu Shuang-ye Goldman D Mitchell C M Sheets H D 2013古生物学报2013,52,2:6
6古生物多样性统计方法及其适用性分析显示文摘以化石产出记录为对象,以时间段为单位的编目式物种多样性统计分析是古生物多样性研究的主要内容。由于地层和化石记录本身的不完整性,以及不同地区和时段各门类化石系统古生物学、生物地层学等方面研究程度的差异,使得多样性统计结果往往存在一定偏差,同时不合理的数学统计方法的选用也会对多样性演化形式产生进一步的误读。基于单一时间段内,不同化石延限类型对该时段物种多样性的贡献度的不同看法,存在多种不同的多样性统计方法。而针对时间段跨度、短延限分子比例和生物群多样性变化形式的不同情况,每一种统计方法各自具有一定的适用范围,合理的方法选择能够良好模拟真实情况;反之,不恰当的统计方法则会人为引进更多的偏差。提高原始数据精度、合理划分时间单元和采用不同统计方法对比研究,可以有效的减小偏差。陈清 樊隽轩 Melchin M J 2012古生物学报2012,51,4:5
7Carbon isotopes and event stratigraphy near the Ordovician–Silurian boundary, Yichang, South China显示文摘Junxuan Fan Ping’an Peng M.J. Melchin 2009Palaeogeography Palaeoclimatology Palaeoecology2009,,1:1
8Carbon isotope chemostratigraphy in Arctic Canada: Sea-level forcing of carbonate platform weathering and implications for Hirnantian global correlation显示文摘Michael J. Melchin Chris Holmden 2005Palaeogeography Palaeoclimatology Palaeoecology2005,,2:1
9Polyphenols from cocoa and vascular health: a critical review显示文摘RIMBACH G MELCHIN M MOEHR G J 2009International Journal of Molecular Sciences2009,10,10:1
10Wenlock (Silurian) graptolites,Cape Phillips Formation, Canadian Arctic Islands显示文摘Lenz A C Melchin M J 1991Earth Sciences1991,82,:1
11Carbon isotope chemostratigraphy in Arctic Canada: sea-level forcing of carbonate platform weathering and implications for Hirnantian global correlation显示文摘Melchin M J Holmden C 2006Palaeogeography Palaeoclimatology Palaeoecology2006,234,234:1
12Relationships among early European maize inbreds Ⅱ Coparision of pedigree and RFLP data显示文摘MESSMER M M MELCHINER A E HERMANN R 1993Crops Science1993,33,:1
13Patterns and processes o{ latest Ordovician graptolite extinc- tion and recovery based on data from South China 显示文摘Chen X Melchin M J Sheets H D etal 2005J Paleontol2005,79,:1
14Determination of the antidepressant effect of mirtazapine augmented with caffeine using Swiss-albino mice显示文摘Depression is a serious health condition affecting an estimate of 350 million people worldwide.Monotherapy with antidepressants as first line treatment however is found to have limited benefits as compared to augmentation therapy.Psychoactive agents such as caffeine,when added to the antidepressants are found to have positive effects with depression by acting as an antagonist to adenosine receptors.Male Swiss albino mice were grouped into six,first three groups with arbitrary doses of the combination of mirtazapine and caffeine and last three control groups being the untreated,mirtazapine-treated and caffeine-treated groups.Alexis Danielle Y.Co Carlos Miguel Calderon ANDrea Tracy G.Cunanan Kristin Almira B.De Guzman Rosvielentine V.Rosales Melchin Edreen O.Tapan Deric S.Vengua Gavino Ivan Tanodra 2016Asian Journal of Pharmaceutical Sciences2016,11,1:0
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