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| 1 | Osmium isotope determination on mantle-derived peridotite xenoliths from Panshishan with N-TIMS显示文摘The 187Os/ 188Os ratios of spinel lherzolite xenoliths from Panshishan determined with N-TIMS are lower than that of the primitive mantle, which shows depleted mantle characteristics. Their positive correlation with Al-2O-3/MgO suggests that the geochemical behavior of trace elements Re and Os is similar to that of Al-2O-3 and MgO respectively during the magmatic evolution and Re-Os isotopic system is largely immune to mantle metasomatism. A model age of 2 8-3 4 Ga obtained by 187Os/ 188Os-Al-2O-3/MgO correlation might represent the homogeneous age of the mantle lithosphere beneath the area. | Weidong Sun Zicheng Peng Xiachen Zhi Daogong Chen Zhaorong Wang Xinhua Zhou | 1998 | Chinese Science Bulletin1998，43，7： | 7 |
| 2 | Do Family Firms Provide More or Less Voluntary Disclosure?显示文摘 | SHUPINGCHEN XIACHEN QIANGCHENG | 2008 | Journal of Accounting Research2008，，3： | 4 |
| 3 | Establishment of transgenic mice carrying gene encoding human zinc finger protein 191显示文摘AIM:Human zinc finger protein 191 (ZNF191) was cloned and characterized as a Krueppel-like transcription factor, which might be relevant to many diseases such as liver cancer,neuropsychiatric and cardiovascular diseases. Although progress has been made recently, the biological function of ZNF191 remains largely unidentified. The aim of this study was to establish a ZNF191 transgenic mouse model,which would promote the functional study of ZNF191.METHODS:Transgene fragments were microinjected into fertilized eggs of mice.The manipulated embryos were transferred into the oviducts of pseudo-pregnant female mice.The offsprings were identified by PCR and Southern blot analysis.ZNF191 gene expression was analyzed by RT-PCR.Transgenic founder mice were used to establish transgenic mouse lineages.The first generation (F1) and the second generation (F2) mice were identified by PCR analysis.Ten-week transgenic mice were used for pathological examination.RESULTS: Four mice were identified as carrying copies of ZNF191 gene.The results of RT-PCR showed that ZNF191 gene was expressed in the liver,testis and brain in one of the transgenic mouse lineages.Genetic analysis of transgenic mice demonstrated that ZNF191 gene was integrated into the chromosome at a single site and could be transmitted stably. Pathological analysis showed that the expression of ZNF 191 did not cause obvious pathological changes in multiple tissues of transgenic mice.CONCLUSION:ZNF191 transgenic mouse model would facilitate the investigation of biological functions of ZNF191 in vivo. | Jian-ZhongLi XiaChen HuaYang Shui-LiangWang Xue-LianGong HaoFeng Bao-YuGuo LongYu Zhu-GangWang Ji-LiangFu | 2004 | World Journal of Gastroenterology2004，10，2： | 3 |
| 4 | Os isotopic composition of the earth's primitive upper mantle显示文摘The osmium isotopic ratio of 187Os/ 188Os ranging from 0.126 to 0.127 for the primitive upper mantle (PUM) is obtained according to the correlation between 187Os/ 188Os and Al 2O 3 of mantle-derived xenoliths and orogenic peridotites, which consists with Allegre and Luck’s ALM value and similar to Yin’s nuggets uniform reservoir (NUR) value. It shows that the Os isotope ratio is lower than enstatite or ondinary chondrites, similar to carbonaceous chondrites (CV3). | Weidong Sun Xiachen Zhi Zicheng Peng Zhaorong Wang Ningjie Ge Xinhua Zhou | 1998 | Chinese Science Bulletin1998，43，18： | 3 |
| 5 | Hydrogen isotope compositions of mantle-derived amphibole megacrysts from Qilin, Guangdong and its tectonic significance显示文摘Hydrogen isotope compositions of mantle-derived amphibole megacrysts from Qilin, Guang dong Province have been obtained by ion micro-probe. δD and H contents are constant both among different samples and within single sample, demonstrating that their formation condition is very stable.High δD values suggest the presence of a component recycled from crust which is possibly related to the subduction of Pacific Plate beneath Eurasian Plate in Mesozoic. | Qunke Xia Daogong Chen Deloule Etienne Xiachen Zhi | 1999 | Chinese Science Bulletin1999，44，5： | 2 |
| 6 | Geochemical database and their applications of mantle xenoliths in Cenozoic alkalic basalts from eastern China显示文摘 | Zhi Xiachen | 1992 | CODATA Bulletin1992，24，2： | 1 |
| 7 | Oxidation Experiment of Natural Megacrystal Clinopyroxene:Implications for Assignment of Mssbauer Spectra显示文摘The M?ssbauer spectra of natural megacrystal clinopyroxene are usually fitted by 4 sets of symmetric doublets, A-A(, B-B(, C-C( and D-D(, respectively, in terms of increasing Qs value in literature. But the assignments of those doublets are quite different, except the D-D( doublet assigned to Fe3+ at the lattice site M1 in previous papers. Particularly, the assignment and interpretation of the C-C' doublet are diverse. The oxidation experiments of natural megacrystal clinopyroxene collected from the Hannuoba basalt, North China, were performed under controlled conditions of temperature at 1000oC and oxygen fugacity of FMQ buffer in 1, 2, 3 and 5 days respectively. The oxidized samples were then measured by X-ray diffraction spectrometry and M?ssbauer spectrometry. The oxidation of clinopyroxene is characterized by Fe2+ → Fe3+ at M1 under the subsolidus conditions, which is consistent with the increase of the area of the D-D( doublet when the heating time increases. Accordingly, the area of the A-A( and B-B( doublets decreases with the increasing heating time. However, the area of C-C' keeps almost constant. Therefore, the 4 sets of doublets can be assigned correctly as follows: A-A( doublet to Fe+2 at M1, B-B( Fe2+ at M1, C-C( Fe2+ at M2, and D-D( Fe3+ at M1. The M1 site splitting is due to the NNN (Next Nearest Neighbour) effect of the M2 site. The amount of Fe3+ at the tetrohedral site of megacrystal clinopyroxene is negligible according to this study. | ZHI Xiachen CHEN Peng LIN Chengzhong CHEN Shuqing ZHANG Guilan LI Yuzhi LIN Lei | 2001 | Acta Geologica Sinica(English Edition)2001，75，1： | 1 |
| 8 | Analyst Coverage and the Cost of Raising Equity Capital: Evidence from Underpricing of Seasoned Equity Offerings*显示文摘 | Robert M.Bowen XiaChen QiangCheng | 2010 | Contemporary Accounting Research2010，，3： | 1 |
| 9 | Effects of Melatonin on Growth,Physiology and Gene Expression in Rice Seedlings Under Cadmium Stress显示文摘Melatonin(MLT)is a hormonal substance found in many organisms and can improve plant stress resistance.In this study,the japonica rice variety Y32 and indica rice variety NJ6 were cultivated in hydroponics under different concentrations of CdCl2 at the two-leaf stage.The growth,physiological and biochemical responses of the seedlings and the expression of cadmium(Cd)-related genes under exogenous melatonin(MLT)treatment were assessed.The results indicated that Cd stress destroyed the dynamic balance between reactive oxygen species(ROS)production and removal,resulting in ROS accumulation,membrane lipid peroxidation,and impaired growth and development.Following the application of exogenous MLT to rice seedlings,increases in plant biomass including both underground and above-ground areas were observed.MLT also scavenged the inhibition of superoxide dismutase(SOD)and peroxidase(POD)in a concentration dependent manner in response to Cd stress.Catalase(CAT)activity and malondialdehyde(MDA)expression also decreased following MLT treatment.Amongst the six Cd-related genes assessed,five genes were downregulated and one was up-regulated in response to MLT treatment.Taken together,these data demonstrate that MLT improves the resilience of rice seedlings at the biochemical,physiological,and molecular levels,and diminishes the damage caused by Cd stress. | Xiachen Lv Yunxia Fang Lantian Zhang Weiyi Zhang Ling Xu Jingjin Han Bailing Jin Xian Zhang Xiaoqin Zhang Dawei Xue | 2019 | Phyton-International Journal of Experimental Botany2019，88，2： | 1 |
| 10 | Analyst Coverage and the Cost of Raising Equity Capital: Evidence from Underpricing of Seasoned Equity Offerings*显示文摘 | Robert M.Bowen XiaChen QiangCheng | 2010 | Contemporary Accounting Research2010，，3： | 1 |
| 11 | Petrogenesis and Geochemistry of Neogene Basalts in Eastern Anhui显示文摘The basalt terrain of the Neogene Huangguoshan and. Guiwu Formations of eastern Anhui on the east side of the Tancheng-Lujiang fault belt is one of a few Cenozoic basalt terrains in eastern China for which detailed geochemical study has not been conducted. This paper reports the abundances of major elements and more than 20 trace elements (including REE) of 22 samples and the Nd, Sr and Pb isotopic compositions of 11 samples from the eastern Anhui basalt terrain, thus more or less systematically revealing the geochemical characteristics of this continental basalt suite. The paper discusses the origin of the basalt suite and the character and process of its mantle source. The basalt suite was derived from a heterogeneous continental lithospheric mantle with end members characteristic of the EMI-type oceanic basalt mantle, which was affected by mantle metasomatism (or enrichment of trace elements) and was characterized by a multi-stage evolution under open conditions. | Zhi Xiachen, Chen Daogong and Yang JinDepartment of Earth and Space Sciences, University of Science andTechnology of China, Hefei, Anhui Jiang M inxi | 1995 | Acta Geologica Sinica(English Edition)1995，69，4： | 0 |
| 12 | Re-Os isotope geochemistry of three Chinese chondrites显示文摘Three Chinese ordinary chondrites,including Jilin (H5),Boxian (LL3.8) and Lujiang (LL6),have been studied for their Re and Os abundances and Os isotopic composition in whole-chondrite samples,separated magnetic and nonmagnetic fractions,and nodules. The results indicate that the Re and Os abundances of the whole-chondrite samples are in the ranges of corresponding H-and LL-Groups,respectively. The Re and Os abundances of magnetic fraction from Boxian and Lujiang are within the range of high-Os ⅡAB and ⅢAB irons,whereas those of nonmagnetic fractions of Boxian and Lujiang are lower than the whole-chondrite values. The Re and Os abundances of nodules in Jilin are in the range of the LL-Group. 187Re/188Os and 187Os/188Os ratios of the three whole chondrites are in the range of ordinary chondrites which locate around the isochron of ⅡAB+ⅢAB irons. 187Re/188Os and 187Os/188Os ratios of the magnetic and nonmagnetic fractions from Boxian have a larger difference. The nonmag-netic fraction of Lujiang may contain a recent addition of Re,which causes deviation of the 187Re/188Os ratio from the irons isochron. The Re and Os abundances of nodules in Jilin are lower than those of the whole-chondrite,but their 187Os/188Os ratios are higher than that of the whole chondrite. | ZHI XiaChen QIN Xie SHI RenDeng HONG JiAn | 2007 | Chinese Science Bulletin2007，52，16： | 0 |
| 13 | Effect of isotope diffusion in solids on isochron ages under -pper mantle conditions显示文摘DODSON presented the concepts of closure temperature (T_c), transitional temperature range (T_h—T_l) and T_l<T_c<T_h in geochronology when he developed the theory of cooling ages. For the mineralogical system in the earth crust, geochronometers work usually under cooling conditions of T<T_c. But in the earth mantle at T>T_l, the effect of matter transfer by diffusion on radiometric dating is not negligible in the transitional temperature range | ZHI Xiachen, CHEN Zengbing, ZHANG Xuehua and ZHENG Yongfei1. Department of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China: 2 Advanced Centre for Earth Science and Astronomy, USTC, Third World Academy of Science, Hefei 230026, China | 1997 | Chinese Science Bulletin1997，42，6： | 0 |
| 14 | Aqueous COmputing:A Survey with an Invitation to Participate显示文摘The concept of aqueous computing is presented here, first in full generality,and afterward, using an implementation in a specific enzymatic technology. Aqueous computingarose in the context of biomolecular (DNA) computing, but the concept is independent ofthe specifics of its biochemical origin. Alternate technologies for realizing aqueous computingare being considered for future implementation. A solution of an instance of the Booleansatisfiability problem, (SAT), is reported here that provides a new example of an aqueouscomputation that has been carried out successfully. This small instance of the SAT problemis sufficiently complex to allow our current enzymatic technology to be illustrated in detail.The reader is invited to participate in the rich interdisciplinary activity required by wet labcomputing. A project is suggested to the reader for determining the three-colorings of a graph.The basic operations required for this project are exhibited in the solution of the SAT examplereported here. | TomHead XiaChen 等 | 2002 | Journal of Computer Science & Technology2002，17，6： | 0 |
| 15 | Chemical Composition of the Primitive Mantle Source of Peridotite Inclusions at Mount Lianshan, Liuhe County,Jiangsu Province显示文摘This paper presents a study of the major and trace element compositions of fresh mantle-derived spinel lherzolite and harzburgite inclusions from Cenozoic alkaline basalt in Mount Lianshan and Mount Panshi, Liuhe County, Jiangsu Province. An estimation is made of the contents of the major elements and some of the trace elements in the primitive mantle source region of the area, from which the authors have obtained MgO/Al2O3= 7.86. The contents of MgO and Al2O3 are also obtained as 37.58% and 4.78% respectively based on the correlation of MgO-Al2O3. Then, the contents of various elements in the primitive mantle are calculated using their regression equations with MgO, and the compositor) of the primitive mantle, a basic issue in geochemistry study, is discussed on that basis. | SUN Weidong PENG Zicheng CHEN Daogong ZHI Xiachen WANG Zhaorong GE Ningjie | 1998 | Acta Geologica Sinica(English Edition)1998，72，2： | 0 |
| 16 | Rice dep1 variety maintains larger stomatal conductance to enhance photosynthesis under low nitrogen conditions显示文摘The DEP1 gene,which corresponds to the erect panicle architecture,shows a pleiotropic effect in increasing grain yield and nitrogen use efficiency in rice.Nevertheless,it remains unclear how nitrogen nutrition affects the photosynthesis in dep1 variety.In the study,we used W7,which carries the gain-of-function dep1 allele and its counterpart wild type plants,in pot trials under two nitrogen conditions.We investigated the differences in photosynthesis,stomatal conductance,and other photosynthetic parameters between the two rice varieties at different levels of nitrogen supply.Our results indicate that dep1 has a higher photosynthetic capacity under low nitrogen conditions due to the larger stomatal conductance.This work reveals that dep1 is more adaptable under a low nitrogen environment by analysis from the perspective of photosynthesis,stomatal function,and nitrogen uptake and assimilation,which provides a theoretical basis for revealing the photosynthetic efficiency of dep1 variety under low nitrogen conditions. | Yihong Li Xiachen Lv Mengmeng Rui Jiang Hu Vadim SVolkov Dali Zeng Yizhou Wang | 2023 | Crop Design2023，2，1： | 0 |
| 17 | Laserprobe oxygen isotope analysis of minerals from mantle-derived rocks in eastern China显示文摘Oxygen isotope analyses were carried out by the laserprobe technique for mineral separates from mantle xenolith and megacryst in Cenozoic basalts, East China. The results not only give the δ I8O range consistent with that reported for peridotites in the world, but also yield oxygen isotope equilibrium between coexisting minerals. | Yiliang Li Wiechert Uwe Yongfei Zheng Xiachen Zhi Jochen Hoefs | 1999 | Chinese Science Bulletin1999，44，8： | 0 |
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