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| 1 | 利用多尺度CT成像表征致密砂岩微观孔喉结构显示文摘为全面表征致密储集层微观孔喉分布及结构特征,对鄂尔多斯盆地上三叠统延长组致密砂岩储集层样品进行纳米—微米多尺度CT三维成像研究。首先利用低分辨率微米尺度X-CT扫描获取直径为2.54 cm岩心柱内部微米级别孔喉结构特征,然后根据微孔分布特征,制备多个直径为65μm的样品进行高分辨率纳米尺度扫描,重构纳米级微孔三维结构模型,最终计算出样品的孔隙度和渗透率。在微米尺度下,孔喉大小不一,直径为5.4~26.0μm,呈孤立状,局部呈条带状;在纳米尺度下,微孔直径主要为0.4~1.5μm,纳米级微孔数量增多,孔喉为管状、球状,分布于矿物颗粒(晶体)内部或表面。纳米级球状微孔连通性较差,三维空间呈孤立状,多仅作为储集空间,而纳米级短管状微孔具有一定的连通性,与微米级管状微孔和邻近孤立球状纳米微孔具有一定连通性,兼具喉道与孔隙的双重功能。数值计算样品渗透率为0.843×10 3μm2,孔隙度为10%。 | 白斌 朱如凯 吴松涛 杨文静 Jeff Gelb Allen Gu 张响响 苏玲 | 2013 | 石油勘探与开发2013，40，3： | 165 |
| 2 | Petrography and chronology of lunar meteorite Northwest Africa 6950显示文摘Northwest Africa(NWA)6950 is an olivine-gabbro lunar meteorite that has a distinctly different petrographic texture from other lunar basalts.In this contribution,we report the petrography,mineralogy,and U-Pb geochronology of baddeleyite and phosphate in this lunar meteorite and make a comparison with other NWA 773 paired meteorites.NWA 6950 consists mainly of coarse-grained olivine,pyroxene,and plagioclase,with minor ilmenite,chromite,troilite,baddeleyite,taenite,and apatite.The abundant rounded to euhedral olivine has a limited Fo ranging from 68 to 69.Pyroxenes include both augite and pigeonite,with a narrow range of Mg#=71–80,and composition,respectively,En46-52Fs12-16Wo32-41 and En58-68Fs19-28Wo7-20.Plagioclase is mainly anhedral,conforming to the crystal margins of olivine and pyroxene.The plagioclase grains are elongated and several hundreds of microns in length.Raman spectra shows that plagioclase has been transformed into maskelynite,which is very calcic(An87-95)with low sodium and very low potassium(Ab4-9Or0.6-3.7).The weighted mean 207Pb/206Pb ages of baddeleyite and phosphate measured using a sensitive high resolution ion micro probe(SHRIMP II)are 3119±16 Ma(n=9,MSWD=2.5)(mean squared weighted deviates,MSWD)and 3119±18 Ma(n=15,MSWD=2.1),respectively,giving the crystallization age of the meteorite.NWA 6950 has similar mineral compositions,geochemical characteristics,and an almost identical age of crystallization to the magnesian gabbro of the NWA 773 clan.We conclude that NWA 6950 and NWA 773 are paired meteorites,which crystallize at ca.3119 Ma,and represent magmatic activities in the KREEP(potassium(K),rare earth elements(REE)and phosphorus(P)rich lunar material)region of the Moon. | Zemin BAO Yuruo SHI JLawford ANDERSON Allen KENNEDY Zuokai KE Xiangping GU Peizhi WANG Xiaochao CHE Yuelan KANG Huiyi SUN Chen WANG | 2020 | Science China(Information Sciences)2020，63，4： | 2 |
| 3 | High concentration of a novel peptide, neruopeptide Y, in the innervation of mouse and rat heart 显示文摘 | Gu J Polak JM Allen JM | 1984 | J Histochem Cytochem1984，32，： | 1 |
| 4 | The regional distribution of NPY-,PHM-,and VIP-containing nerves in the human female genital tract显示文摘 | Blank MA Gu J Allen JM | 1986 | Int J Fertil1986，31，： | 1 |
| 5 | The breast lesion excision system (BLES):a novel technique in the diagnostic and therapeutic management of small indeterminate breast lesions显示文摘 | Allen SD Nerurkar A Della Rovere GU | 2011 | Eur Radiol2011，21，5： | 1 |
| 6 | Non Destructive 3D, 4D Microscopy and Mineral Phase Characterization in Industrial Minerals, Composites to Construction Materials显示文摘Conventional electron and optical microscopy techniques require the sample to be sectioned, polished or etched to expose the internal surfaces for imaging. However, such sample preparation techniques have traditionally prevented the observation of the same sample over time, under realistic three-dimensional geometries and in an environment representative of real-world operating conditions. X-ray microscopy (XRM) is a rapidly emerging technique that enables non-destructive evaluation of buried structures within hard to soft materials in 3D, requiring little to no sample preparation. Furthermore in situ and 4D quantification of microstructural evolution under controlled environment as a function of time, temperature, chemistry or stress can be done repeatable on the same sample, using practical specimen sizes ranging from tens of microns to several cm diameter, with achievable imaging resolution from submicron to 50 nm. Many of these studies were reported using XRM in synchrotron beamlines. These include crack propagation on composite and construction materials; corrosion studies; microstructural changes during the setting of cement; flow studies within porous media to mention but a few. | S H Lau Arno Merkle Susan Candell Sylvia Yun Allen Gu Wenbing Yun | 2013 | 矿物学报2013，33，S1： | 0 |
| 7 | Rapid Large Volume 3D Mineral Processing and Liberation Characterization Technique to Sub Micron Resolution显示文摘We describe a novel lab based X-ray computed tomography system based on the architecture of X-ray Microscopes (XRM) used in synchrotron radiation facilities to be adapted for mineral processing and mineral liberation analysis. As this is a tomographic technique performed with an XRM, it is non-destructive and does not require complex preparation of polished sections typical of SEM-EDS techniques (such as MLA and QEMSCAN). It complements these existing techniques by providing 3D information and mineral liberation of multi-phase particles with much larger sample volume statistics but at a fraction of the time. In several applications, the technique is superior. These include the characterization of tailing loss in precious minerals; the characterization of porosity, particle size distribution, crack and pore network analysis during comminution, heap leaching and for texture and exposure/lock class analysis for floatation. | S H Lau Susan Candell Sylvia Yun Allen Gu YUN Wenbing | 2013 | 矿物学报2013，33，S1： | 0 |
| 8 | 基于显微CT的地下工程SBS防水卷材微观研究显示文摘利用X射线CT技术对地下工程SBS改性沥青防水卷材的微观结构进行研究,探讨该技术在微观研究中的适用性。通过剪取SBS防水卷材原状试样置于显微CT系统上进行扫描,获得一系列的2D显微CT切片图像,借助图像处理软件进行3D图像的重构,并进行图像处理,最后基于重构图像进行数据的统计和分析。结果表明:对试样的3D重构图像进行分析可以获得添加物颗粒的相关参数,同时可以清楚观察到试样的层状分布形态;试样各区域材料的差异性较大;等效直径60μm是颗粒数目分布的转折点,其两侧表现出不同的分布规律;中等颗粒和大颗粒对颗粒总体积有很大贡献。研究结果证实了采用显微CT技术对地下工程防水卷材进行微观研究的可行性,为地下工程防水材料损伤及其耐久性研究提供了一种新的途径。 | 王庆国 杨其新 蒋雅君 杨娟 Gu Allen | 2016 | 地下空间与工程学报2016，12，1： | 0 |
| 9 | Screening antioxidants for the protection of cochlear sensory cells显示文摘Sensory cell damage is a major cause of hearing loss:Sensorineural hearing loss(SNHL)is a common sensory defici characterized by tissue damage and/or cell death in the cochlea Moderate and severe SNHL causes deficits in communication associated with increased isolation from human relationships and negativly impacts employability.Many etiologies have been associated with SNHL:Noise overexposure,certain drugs,inner or middle ear infection or immune-induced | Dong Gu Hur Arwa Kurabi Allen F.Ryan | 2018 | Neural Regeneration Research2018，13，1： | 0 |
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