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Localization and quantitative analysis of interleukin-6 in human placenta

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Chinese Science Bulletin 1998年第12期43卷 1031-1034页

作者： zhang rongqing Li Yaping Huang Weiquan Di Xinyu Tsing Hua Univ Dept Biol Beijing 100084 Peoples R China Fourth Mil Med Univ Dept Histol & Embryol Xian 710032 Peoples R China

The localization of IL6 at light microscopic levels and its quantitative analysis in human placentas were studied by using immunohistochemistry. Both syncytiotrophoblast and cytotrophoblast in placental villi, white blood cells in villose capillary cavity stromal cells and capillary endothelium present IL6 immunoreactivity in cytoplasm. Using a quantitative immunohistochemical method, the amounts of IL6 in placenta were low at the 6th week of gestation, increased saliently and peaked at the 7th, then reduced gradually during the rest of the gestation period and maintained the same level as that in the 6th week of gestation. This changing trend was paralleled with that of GnRH in our previous studies. These results revealed that IL6 could be produced by the human placenta and may take part in the regulation of placental hormone releasing.

关键词： interleukin6 localization quantitative determination human placenta.

Re-Os isotope dating of pyrite from the footwall mineralization zone of the Xinqiao deposit,Tongling,Anhui Province:Geochronological evidence for submarine exhalative sedimentation

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Chinese Science Bulletin 2011年第35期56卷 3860-3865页

作者： GUO WeiMin LU JianJun JIANG ShaoYong zhang rongqing QI Liang State Key Laboratory for Mineral Deposits Research School of Earth Sciences and Engineering Nanjing University Nanjing 210093 China State Key Laboratory o fOre Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

The Xinqiao deposit is located in the Tongling area,Anhui *** deposit is dominantly composed of stratiform sulfide orebodies,which are restricted to the transitional zone from clastic rocks to carbonates at the base of the Late Carboniferous Huanglong *** are discordant veinlets or networks of mineralization in the footwall rocks below the stratiform sulfide *** underlying discordant mineralization zones coexist with conformable stratiform sulfide orebodies,which are considered to be the most representative features of massive sulfide deposits formed by submarine exhalative *** study reports a pyrite 187Re-187Os isotopic age of 319±13 Ma(MSWD=16) for the footwall mineralization *** isochron age is consistent with the interval of strata hosting the conformable stratiform sulfide orebody,and provides direct geochronological evidence for Carboniferous exhalative sedimentary mineralization.

关键词：海底喷流沉积同位素年代学矿化带同位素定年下盘安徽铜陵新桥证据

Substitution of Ni for Zn on microstructure and mechanical properties of Mg-Gd-Y-Zn-Mn alloy

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Journal of Magnesium and Alloys 2017年第3期5卷 355-361页

作者： rongqing zhang Jingfeng Wang Song Huang Shijie Liu Fusheng Pan Chongqing Bashu Secondary School Chongqing 400013China National Engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400044China

This study analyzes the effect of substitution of Ni for Zn on microstructure and mechanical properties of Mg-Gd-Y-Zn-Mn *** results show that the volume fraction of Mg5(Gd,Y)and(Mg,Zn)3RE phase decreased and LPSO phase increased with more substitution of *** homogenization,onlyα-Mg and LPSO phase *** Mg-Gd-Y-Zn-Mn alloys,the LPSO phases mainly consisted of the 14H *** in Mg-Gd-Y-Ni-Mn alloy,the LPSO phases consisted of the 18R *** addition,compared with Mg-Gd-Y-Zn-Mn alloy,the mechanical properties of as-extruded Ni-substitution alloys were improved due to the better refinement of the size of grains and LPSO *** tensile strength in as-extruded Mg-Gd-Y-Ni-Mn alloy could reach up to 400 MPa with 18%of the elongation to failure.

关键词： Magnesium alloy Substitution Microstructure Mechanical property LPSO phase

5G ENABLED VEHICULAR COMMUNICATIONS AND NETWORKING

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China Communications 2018年第7期15卷 I0003-I0006页

作者： xiang cheng rongqing zhang shanzhi chen jia li liuqing yang hongwei zhang peking university ieee colorado state university datang telecom technology&industry group catt state key laboratory of wireless mobile communications tpc the school of engineering and computer science at oakland university iowa state university 不详

Vehicular communications and networking(VCN)is considered a billion-dollar *** development not only possesses economic value,but also has enormous social *** earliest vehicular network started from the dedicated short range networks,such as the IEEE 802.11p standard established at the beginning of this *** recent years,the public access network based VCN has been rapidly *** example,LTE-V based on 4G LTE is under standardization。

关键词：联网通讯车辆启用经济价值

Adakitic rocks associated with the Shilu copper–molybdenum deposit in the Yangchun Basin,South China,and their tectonic implications

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Acta Geochimica 2017年第2期36卷 132-150页

作者： Lipeng zhang Yongbin Hu Jinlong Liang Trevor Ireland Youliang Chen rongqing zhang Saijun Sun Weidong Sun CAS Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China University of Chinese Academy of Sciences Beijing 100094 China Department of Geochemistry Chengdu University of Technology Chengdu 610059 China Research School of Earth Sciences The Australian National University Bldg 61 Mills Road Acton ACT Canberra ACT 0200 Australia Center of Deep Sea Research Institute of Oceanography Chinese Academy of Sciences Qingdao 266071 China CAS Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Science Beijing 100101 China

South China is famous for the extensive magmatism and polymetallic mineralization that took place there in the Mesozoic. Shilu is a large porphyry–skarn Cu–Mo deposit in the Yangchun Basin, South China. The lithology of the Shilu intrusion is granodiorite and quartz diorite, both of which are high-K calc-alkaline series, with high Sr([400 ppm) content along with low Y and Yb contents. Most of the samples have characteristics of adakite except for a few samples that have slightly higher Y and Yb contents, which may be plausibly explained by crustal contamination. Laser Ablation Inductively Coupled Plasma Mass Spectrometry zircon U–Pb dating revealed ages between 106.6 ± 1.3 and 103.9 ± 0.5 Ma, with multiple magmatic pulses. Molybdenite Re–Os isochron age of 102.2 ± 2.9 Ma(MSWD = 9.4) was determined, which is identical to the youngest zircon U–Pb age(103.9 ± 0.5 Ma) within *** Shilu intrusion has high oxygen fugacity as indicated by high zircon Ce^(4+)/Ce^(3+) and Eu_N/Eu_N* ratios. Considering the geochemical characteristics(high Sr, and low Y and Yb contents), high oxygen fugacity, and copper mineralization of the Shilu intrusion, it was most likely formed by partial melting of a subducted young oceanic slab. Whole-rock Sr–Nd isotope-, zircon Hf isotope-, and whole-rock trace element analyses show that Shilu adakitic magmas may have interacted with type II enriched mantle and/or crustal materials during ascent. South China was affected by the Pacific tectonic regime to the east and the Neo-Tethys tectonic regime to the south in the Cretaceous. Based on the Pacific Plate drifting and rotation history, it is hard to explain how the Pacific Plate would have subducted and melted, forming adakitic rocks in the Shilu region. Considering the tectonic history of Southeast Asia and the South China Sea, the Neo-Tethys trench should have been much closer to the South China Block in the Cretaceous, and thus have had a greater impact on the South China Block. Based on the

关键词： Shilu deposit Adakitic rocks Cretaceous Neo-Tethys South China

A possible mechanism for the formation of annual growth lines in bivalve shells

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Science China(Life Sciences) 2011年第2期54卷 175-180页

作者： LIU XiaoJun YAN ZhenGuang ZHENG GuiLan zhang GuiYou WANG HongZhong XIE LiPing zhang rongqing Institute of Marine Biotechnology School of Life Sciences Tsinghua University Beijing 100084 China Protein Science Laboratory of the Ministry of Education Tsinghua University Beijing 100084 China Key Lab of Ecological Effect and Risk Assessment for Chemicals Chinese Research Academy of Environmental Sciences Beijing 100012 China

We report a unique shell margin that differed from the usual shell structure of Pinctada *** observed empty organic envelopes in the prismatic layer and the formation of the nacreous layer in the shell *** the characteristics of the growing margin indicated that the shell was growing *** explain this anomaly,we propose the concept of "jumping development".During jumping development,the center of growth in the bivalve shell jumps forward over a short time interval when the position of the mantle *** development explains the unusual structure of the anomalous shell and the development of annual growth lines in typical *** growth lines are the result of a discontinuity in the shell microstructure induced by jumping development.

关键词： bivalves shell microstructure internal growth bands the prismatic layer the nacreous layer

Petrogenetic differences between the Middle-Late Jurassic Cu-Pb-Zn-bearing and W-bearing granites in the Nanling Range,South China： A case study of the Tongshanling and Weijia deposits in southern Hunan Province

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Science China Earth Sciences 2017年第7期60卷 1220-1236页

作者： HUANG XuDong LU JianJun Stanislas SIZARET WANG RuCheng MA DongSheng zhang rongqing ZHAO Xu WU JinWei State Key Laboratory for Mineral Deposits Research School of Earth Sciences and Engineering Nanjing University Nanjing 210023 China Institut des Sciences de la Terre d'Orleans UMR 7327-CNRS/Université d'Orleans/BRGM Orleans 45071 France Chinese Academy of Sciences Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

The Middle-Late Jurassic Cu-Pb-Zn-bearing and W-bearing granites in the Nanling Range have distinctly different mineralogical and geochemical signatures. The Cu-Pb-Zn-bearing granites are dominated by metaluminous amphibole-bearing granodiorites, which have higher CaO/(Na2O+K2O) ratios, light/heavy rare earth element(LREE/HREE) ratios, and δEu values,lower Rb/Sr ratios, and weak Ba, Sr, P, and Ti depletions, exhibiting low degrees of fractionation. The W-bearing granites are highly differentiated and peraluminous, and they have lower CaO/(Na2O+K2O) ratios, LREE/HREE ratios, and δEu values,higher Rb/Sr ratios, and strong Ba, Sr, P, and Ti depletions. The Cu-Pb-Zn-bearing granites were formed predominantly between155.2 and 167.0 Ma with a peak value of 160.6 Ma, whereas the W-bearing granites were formed mainly from 151.1 to 161.8Ma with a peak value of 155.5 Ma. There is a time gap of about 5 Ma between the two different types of ore-bearing *** on detailed geochronological and geochemical studies of both the Tongshanling Cu-Pb-Zn-bearing and Weijia W-bearing granites in southern Hunan Province and combined with the other Middle-Late Jurassic Cu-Pb-Zn-bearing and W-bearing granites in the Nanling Range, a genetic model of the two different types of ore-bearing granites has been proposed. Asthenosphere upwelling and basaltic magma underplating were induced by the subduction of the palaeo-Pacific plate. The underplated basaltic magmas provided heat to cause a partial melting of the mafic amphibolitic basement in the lower crust, resulting in the formation of Cu-Pb-Zn mineralization related granodioritic magmas. With the development of basaltic magma underplating,the muscovite-rich metasedimentary basement in the upper-middle crust was partially melted to generate W-bearing granitic magmas. The compositional difference of granite sources accounted for the metallogenic specialization, and the non-simultaneous partial melting of one source followed by the other

关键词： Cu-Pb-Zn-bearing granites W-bearing granites Petrogenesis Middle-Late Jurassic Nanling Range

Erosion of the prismatic layer by the organic matrix during the formation of the nacre-prism transition layer in the shell of Pinctada fucata (Bivalvia, Mollusca)

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Chinese Science Bulletin 2011年第9期56卷 869-876页

作者： LIU XiaoJun LIU Chang SUN Juan ZHOU YuJuan ZHENG GuiLan zhang GuiYou WANG HongZhong XIE LiPing zhang rongqing Institute of Marine Biotechnology School of Life Sciences Tsinghua University Beijing 100084 China Protein Science Laboratory of the Ministry of Education Tsinghua University Beijing 100084 China

Three variants of the sequence of formation of the nacre-prism transition layer were observed in Pinctada fucata (Bivalvia, Mollusca) shells. In each case, the layer was formed by the organic matrix secreted by the mantle, together with the interprismatic organic envelope. The continuity of the organic phase throughout the shell was maintained as the new nacreous layer was formed on the nacre-prism transition layer. Changes in the interprismatic organic envelopes on either side of the nacre-prism transition zone indicated that the organic matrix of the nacre-prism transition layer becomes embedded into the organic phase of the prismatic layer. It is concluded that penetration and erosion of the prisms by the organic matrix generates a strong bond between the prismatic and nacreous layers.

关键词：有机基质珍珠层过渡层双壳类棱镜软体动物侵蚀棱柱

川西甲基卡锂矿床伟晶岩结构分带及多期岩浆成矿作用

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地质学报 2024年第5期98卷 1358-1379页

作者：朱文斌许志琴林和丰周明召朱鋆悦靳文楷罗祥龙章荣清车旭东李广伟郑碧海内生金属矿床成矿机制研究国家重点实验室南京大学地球科学与工程学院南京大学大陆动力学研究院江苏南京210023

LCT(lithium-cesium-tantalum)伟晶岩的分带有两种形式,一种是单个伟晶岩脉的内部结构分带,这种伟晶岩脉通常体积巨大,内部结构显示出成分分带的特征,单一脉体中不同结构带中可能发育不同的稀有金属矿化带,例如新疆可可托海3号伟晶岩脉... 详细信息

LCT(lithium-cesium-tantalum)伟晶岩的分带有两种形式,一种是单个伟晶岩脉的内部结构分带,这种伟晶岩脉通常体积巨大,内部结构显示出成分分带的特征,单一脉体中不同结构带中可能发育不同的稀有金属矿化带,例如新疆可可托海3号伟晶岩脉;另一种分带性表现为伟晶岩和成矿系统的区域分带,通常以高分异的过铝质花岗岩为中心,围绕花岗岩数以百计的伟晶岩脉显示出不同的伟晶岩类型和矿化类型,越向外围,伟晶岩的演化程度越高。区域分带内的伟晶岩单个脉体的规模不大、内部分带性差、含矿性各不相同,甲基卡锂矿就是这一类伟晶岩矿床的典型代表。对甲基卡矿区伟晶岩的野外观察发现,含Be的9号脉、含Li的133号脉和含Nb、Ta的528号脉具有相对较好的内部结构分带性,而含Li的104号脉和308号脉的内部分带性则相对较差,推测与脉体内部多期岩浆-热液活动有关。甲基卡矿区伟晶岩脉的相互穿插现象说明,矿区存在多期次的岩浆与成矿作用。科学钻探在JSD-2和JSD-3两个钻孔中均发现含锂辉石的伟晶岩脉和细晶岩脉侵入在不含矿的马颈子花岗岩中,佐证了多期岩浆与成矿事件的存在。伟晶岩中不同矿物U-Pb定年结果表明,全区伟晶岩的形成至少有两期,分别发生在213~206 Ma和199~191 Ma。依据钻孔JSD-1的研究表明,岩浆由深至浅逐步向高分异方向演化。从下向上,花岗岩与伟晶岩同步演化,花岗岩依次出现黑云母花岗岩、含白云母的黑云母花岗岩、二云母花岗岩、白云母花岗岩和钠长石花岗岩,伟晶岩依次出现微斜长石型伟晶岩、微斜长石-钠长石型伟晶岩、钠长石型伟晶岩和钠长石-锂辉石型伟晶岩。根据不同深度伟晶岩的矿化特点,矿床的垂向分带大致划分如下:0~105 m的Li-Be-Nb-Ta矿化带;0~860 m的Be-Nb-Ta矿化带;0~1730 m的第一期Nb-Ta矿化带;1730~3170 m的无矿伟晶岩带;3170~3211 m的第二期Nb-Ta矿化带。

关键词：甲基卡内部分带区域分带伟晶岩成矿作用