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| 1 | Versatile Nucleotides Substitution in Plant Using an Improved Prime Editing System显示文摘Dear Editor,Base editors(BEs)based on the CRISPR/Cas9 system,including cytosine base editors and adenine base editors,which can efficiently perform four transition mutations(C·G-to-T·A and A·T-to-G·C),have been well studied and widely used to produce base mutations in a variety of organisms,including in plants such as rice. | Wen Xu Chengwei Zhang Yongxing Yang Si Zhao Guiting Kang Xiaoqing He Jinling Song Jinxiao Yang | 2020 | Molecular Plant2020，13，5： | 20 |
| 2 | Rattle-Type Silica Colloidal Particles Prepared by a Surface- Protected Etching Process显示文摘This paper explores the capability of the“surface-protected etching”process for the creation of rattle-type SiO_(2)@void@SiO_(2) colloidal structures featuring a mesoporous silica shell and a mesoporous movable silica core.The surface-protected etching process involves stabilization of the particle surface using a polymer ligand,and then selective etching of the interior to form hollow structures.In this paper,this strategy has been extended to the formation of rattle-like structures by etching SiO_(2)@SiO_(2) core shell particles which are synthesized by a two-step sol gel process.The key is to introduce a protecting polymer of polyvinylpyrrolidone(PVP)to the surface of both core and shell in order to tailor their relative stability against chemical etching.Upon reacting with NaOH,the outer layer silica becomes a hollow shell as only the surface layer is protected by PVP and the interior is removed,while the core remains its original size thanks to the protection of PVP on its surface.This process can be carried out at room temperature without the need of additional templates or complicated heterogeneous coating procedures.The etching process also results in the rattle-type colloids having mesoscale pores with two distinct average sizes.In our demonstration of a model drug delivery process,such mesoporous structures show an interesting two-step elution profile which is believed to be related to the unique porous rattle structures. | Qiao Zhang Jianping Ge James Goebl Yongxing Hu Zhenda Lu Yadong Yin | 2009 | Nano Research2009，2，7： | 18 |
| 3 | Packaging and Temperature Compensation of Fiber Bragg Grating for Strain Sensing: A Survey显示文摘 | Yi KUANG Yongxing GUO Li XIONG Wenlong LIU | 2018 | Photonic Sensors2018，8，4： | 16 |
| 4 | The effect of Scuteilaria baicalensis stem-leaf flavonoids on spatial learning and memory in chronic cerebral ischemia-induced vascular dementia of rats显示文摘Flavonoids 被显示了改进认知功能并且推迟痴呆前进。然而,内在的机制留下逃犯。在现在的学习,我们检验了从 S 提取的黄芩 baicalensis 茎叶总数 flavonoids (SSTF ) 的效果。在脉管的痴呆(VaD ) 的空间学习和记忆上的 baicalensis Georgi 老鼠模型并且探索了它的分子的机制。VaD 老鼠被普通颈动脉动脉的永久双边的吸藏开发。在恢复以后的七天, VaD 老鼠与 SSTF 的 50 或 100 mg/kg 被对待 60 天。空间学习和记忆在莫利斯舞水迷宫(MWM ) 被评估测试。字形物 hyperphosphorylation 和相关蛋白质 kinases 或磷酸酶的层次被西方的污点分析检验。在 VaD 老鼠,在 100 mg/kg 的 SSTF 处理显著地在在 MWM 测试训练试用减少了逃跑潜伏。在探针试用, SSTF 治疗在目标象限增加了寻找的时间和旅行距离。SSTF 处理在 VaD 老鼠在外皮和马头鱼尾的怪兽禁止了字形物 phosphorylation。同时, SSTF 减少了肝糖 synthase kinase 的活动 3 并且 cyclin 依赖的 kinase 5 在 VaD 老鼠。相反, SSTF 处理在 VaD 老鼠增加了蛋白质磷酸酶 2A 子单元 B 的水平。SSTF 处理显著地在 VaD 老鼠改进了空间认知。我们的结果建议 SSTF 可以通过在击以后协调 kinases 和磷酸酶的活动减轻 tau-hyperphosphorylation-induced neurotoxicity。SSTF 可以为 VaD 被开发进有希望的新奇治疗学。 | Yanjing Cao Lizhen Liang Jian Xu Jiali Wu Yongxing Yan Ping Lin Qiang Chen Fengming Zheng Qin Wang Qian Ren Zengmei Gou Yifeng Du | 2016 | Acta Biochimica et Biophysica Sinica2016，48，5： | 10 |
| 5 | Recent Progress in Distributed Optical Fiber Raman Photon Sensors at China Jiliang University显示文摘在在中国 Jiliang 大学(CJLU ) 的完整的分布式的纤维拉曼光子传感器的研究,生产和应用的最近的进步的简短评论被介绍。以便改进测量距离,精确性,空间分辨率,多参数大小的能力,和完整的分布式的纤维传感器系统的智力,一种新一代纤维传感器技术基于光纤维,非线性的散布熔化原则被建议。一系列新一代完整的分布式的纤维传感器被调查并且设计,它由新产生组成极端长的距离散布与一个纤维拉曼放大器综合的光子传感器的完整的分布式的纤维拉曼和瑞利,汽车修正完整的分布式的纤维拉曼光子温度传感器基于拉曼关联双来源,完整的分布式的纤维拉曼光子温度传感器基于编码的脉搏采购原料,完整的分布式的纤维拉曼光子温度传感器 | Zaixuan ZHANG | 2012 | Photonic Sensors2012，2，2： | 8 |
| 6 | Discriminated sgRNAs-Based SurroGate System Greatly Enhances the Screening Efficiency of Plant Base-Edited Cells显示文摘The development of CRISPR/Cas9-mediated base editing has made genomic modification more efficient. However, selection of genetically modified cells from millions of treated cells, especially plant cells, is still challenging. In this study, an efficient surrogate reporter system based on a defective hygromycin resistance gene was established in rice to enrich base-edited cells. After step-by-step optimization, the Discriminated sgRNAs-based SurroGate system (DisSUGs) was established by artificially differentiating the editing abilities of a wild-type single guide RNA (sgRNA) targeting the surrogate reporter gene and an enhanced sgRNA targeting endogenous sites. The DisSUGs enhanced the efficiency of screening base-edited cells by 3- to 5-fold for a PmCDA1-based cytosine-to-tyrosine base editor (PCBE), and 2.5- to 6.5-fold for an adenine base editor (ABE) at endogenous targets. These targets showed editing efficiencies of <25% in the conventional systems. The DisSUGs greatly enhanced the frequency of homozygous substitutions and expanded the activity window slightly for both a PCBE and an ABE. Analyses of the total number of single-nucleotide variants from whole-genome sequencing revealed that, compared with the no-enrichment PCBE strategy, the DisSUGs did not alter the frequency of genome-wide sgRNA-independent off-target mutations, but slightly increased the frequency of target-dependent off-target mutations. Collectively, the DisSUGs developed in this study greatly enhances the efficiency of screening plant base-edited cells and will be a useful system in future applications. | Wen Xu Yongxing Yang Ya Liu Guiting Kang Feipeng Wang Lu Li Xinxin Lv Si Zhao Shuang Yuan Jinling Song Ying Wu Feng Feng Xiaoqing He Chengwei Zhang Wei Song Jiuran Zhao Jinxiao Yang | 2020 | Molecular Plant2020，13，1： | 8 |
| 7 | Wheat powdery mildew resistance gene Pm64 derived from wild emmer (Triticum turgidum var.dicoccoides) is tightly linked in repulsion with stripe rust resistance gene Yr5显示文摘Stripe rust and powdery mildew are both devastating diseases for durum and common wheat.Pyramiding of genes conferring resistance to one or more diseases in a single cultivar is an important breeding approach to provide broader spectra of resistances in wheat improvement. A new powdery mildew resistance gene originating from wild emmer(Triticum turgidum var.dicoccoides) backcrossed into common wheat(T. aestivum) line WE35 was identified. It conferred an intermediate level of resistance to Blumeria graminis f. sp. tritici isolate E09 at the seedling stage and a high level of resistance at the adult plant stage. Genetic analysis showed that the powdery mildew resistance in WE35 was controlled by a dominant gene designated Pm64. Bulked segregant analysis(BSA) and molecular mapping indicated that Pm64 was located in chromosome bin 2 BL4-0.50–0.89. Polymorphic markers were developed from the corresponding genomic regions of Chinese Spring wheat and wild emmer accession Zavitan to delimit Pm64 to a 0.55 cM genetic interval between markers WGGBH1364 and WGGBH612, corresponding to a 15 Mb genomic region on Chinese Spring and Zavitan 2 BL, respectively. The genetic linkage map of Pm64 is critical for fine mapping and cloning. Pm64 was completely linked in repulsion with stripe rust resistance gene Yr5. Analysis of a larger segregating population might identify a recombinant line with both genes as a valuable resource in breeding for resistance to powdery mildew and stripe rust. | Deyun Zhang Keyu Zhu Lingli Dong Yong Liang Genqiao Li Tilin Fang Guanghao Guo Qiuhong Wu Jingzhong Xie Yongxing Chen Ping Lu Miaomiao Li Huaizhi Zhang Zhenzhong Wang Yan Zhang Qixin Sun Zhiyong Liu | 2019 | The Crop Journal2019，7，6： | 8 |
| 8 | Microstructure and Mechanical Properties of 45 vol.%SiC_p/7075Al Composite显示文摘Microstructure and mechanical behavior of high volume content Si Cp/7xxx Al composites have not been explored yet. Therefore, in the present work, 45 vol.% SiC p/7075 Al composite has been prepared by pressure infiltration method. High density dislocations were found around Si C/Al interface in SiC p/7075 Al composite after water-quenching and aging treatment. Fine dispersed nano-η′ phases were observed after the aging treatment. Adverse to other Si Cp/Al composites prepared by the pressure infiltration method,an interface layer was observed between SiC particles and Al matrix. Furthermore, high-resolution transmission electron microscopy(HRTEM) observation indicated that this interface layer was coherent/semicoherent with that of the SiC particles. 45 vol.% SiC p/7075 Al composite demonstrated high tensile strength(630 MPa) and micro-ductility. Compared to aged Si Cp/2024 Al composite, the aged Si Cp/7075 Al composite showed an increase of about 200% in the tensile strain and 90% in the tensile strength, respectively.It is speculated that nano-η′ phases in the Al matrix significantly contributed to the strengthening effect while the interface layer between Si C and Al matrix might be beneficial to the strength and plasticity of Si Cp/7075 Al composite. | Ziyang Xiu Wenshu Yang Ronghua Dong Murid Hussain Longtao Jiang YongXing Liu Gaohui Wu | 2015 | Journal of Materials Science & Technology2015，31，9： | 7 |
| 9 | Suppression of murine breast cancer metastasis by selective inhibition of CXCR4 by synthetic polypeptide derived from viral macrophage inflammatory protein Ⅱ显示文摘Stromal cell-derived factor-1 and its receptor CXC chemokine receptor-4(CXCR4)have been implicated in breast cancer metastasis.A significant association between HER2 and CXCR4 expression has been observed in human breast tumor tissues,and overexpression of CXCR4 is essential for HER2-mediated tumor metastasis.Moreover,CXCR4 expression is low in normal breast tissues and high in malignant tumors,suggesting that a blockade of CXCR4 may limit tumor metastasis.The present study investigated the action of a synthetic antagonist 21-mer peptide derived from viral macrophage inflammatory protein Ⅱ against CXCR4(NT21MP)in inhibiting metastasis in vitro and in vivo.The results showed that chemotaxis of SKBR3 cells toward SDF-1αwas reduced by NT21MP in a dose-dependent manner(P<0.05).NT21MP inhibited tumor growth at 500μg/kg and in combination with Herceptin,the anti-HER2 antibody.The in vivo metastatic assay showed that NT21MP significantly inhibited pulmonary metastasis,and the number of metastatic tumor nodes on the surface of the lung was greatly decreased.Compared with the saline-treated control group,PCNA expression was dose-dependently decreased by NT21MP,the percentage of apoptotic cells was increased,and CXCR4 mRNA and protein expression were downregulated.In conclusion,NT21MP inhibits cellular proliferation,promotes apoptosis by downregulating CXCR4 expression,and suppresses the progression of primary and metastatic tumors.CXCR4 may be a useful therapeutic target for breast cancer,and NT21MP may serve as a potential target drug for the treatment of breast cancer metastasis. | YANG QingLin DING YongXing CHEN ChangJie TANG Jie ZHANG Ju YANG ZhiFeng | 2010 | Chinese Science Bulletin2010，55，20： | 6 |
| 10 | Indian hedgehog mutations causing brachydactyly type A1 impair Hedgehog signal transduction at multiple levels显示文摘Brachydactyly 打 A1 (BDA1 ) ,第一在人记录了孟德尔的正染色体的主导的混乱,被弄短或中间的指骨的缺席描绘。在印度刺猬(IHH ) 基因的异质接合的错误感觉变化作为 BDA1 的一个原因被识别了;然而,这些变化的生物化学的后果是不清楚的。在这份报纸,我们在印度刺猬(IhhN ) 的 N 终端碎片分析了三个 BDA1 变化(E95K, D100E,和 E131K ) 。结构的分析证明 E95K 变化在一条钙绑定沟把一个否定地控告的区域改变到一个断然控告的区域,并且 D100E 变化改变本地第三级的结构。而且,我们证明 E95K 和 D100E 变化导致了一温度敏感并且 IhhN 的钙依赖者不稳定性,它可能经由 lysosome 贡献变异的蛋白质的提高的细胞内部的降级。尤其是,所有三个变化影响了对受体 Patched1 (PTC1 ) 有约束力的 Hh,减少它的能力导致细胞的区别。我们建议这些是引起 BDA1 的变化的普通特征,影响 Hh 第三级的结构,细胞内部的命运,到受体 / 搭挡的绑定,和到细胞外的部件的绑定。这些特征的联合改变发信号的能力和范围,但是影响是可能的是变量和变化依赖者。在发信号的范围的潜在的变化被和 heparan 硫酸盐的一个提高的相互作用与 E95K 变化,然而并非 E131K 变化为 IHH 描绘。一起拿,我们的结果建议这些 IHH 变化影响在多重层次,引起的反常骨头发展和反常的位形成发信号的 Hh。 | Gang Ma Jiang Yu Yue Xiao Danny Chan Bo Gao Jianxin Hu Yongxing He Shengzhen Guo Jian Zhou Lingling Zhang Linghan Gao Wenjuan Zhang Yan Kang Kathryn SE Cheah Guoyin Feng Xizhi Guo Yujiong Wang Cong-zhao Zhou Lin He | 2011 | Cell Research2011，21，9： | 6 |
| 11 | Mapping stripe rust resistance genes by BSR-Seq:YrMM58 and YrHY1 on chromosome 2AS in Chinese wheat lines Mengmai 58 and Huaiyang 1 are Yr17显示文摘Stripe rust(yellow rust), caused by Puccinia striiformis f. sp. tritici(PST),is one of the most devastating fungal diseases in common wheat(Triticum aestivum L.) in China and worldwide. Resistance breeding is the most effective strategy to control diseases in crop plants. Chinese wheat lines Mengmai 58 and Huaiyang 1 are highly resistant to PST race CYR34(V26) at the adult plant stage. To genetically map the underlying resistance genes we developed segregating populations by crossing Mengmai 58 and Huaiyang 1 with the susceptible cultivar Nongda 399. The stripe rust resistances in Mengmai 58 and Huaiyang 1 were both controlled by single dominant genes, provisionally designated YrMM58 and YrHY1, respectively. Bulked segregant RNA-Seq(BSR-Seq) analysis showed that YrMM58 and YrHY1 were located in the same distal ~16 Mb region on chromosome 2 AS.Comparative genomics analysis with the physical map of Aegilops tauschii proved useful for developing additional markers to saturate the genetic linkage map. YrMM58 and YrHY1 were mapped to the distal end of chromosome arm 2 AS, with the closest marker WGGB148 being 7.7 cM and 3.8 cM from the resistance gene, which was considered to be Yr17. These markers can be used in marker-assisted selection. | Yong Wang Huaizhi Zhang Jingzhong Xie Bingmin Guo Yongxing Chen Huaiyu Zhang Ping Lu Qiuhong Wu Miaomiao Li Deyun Zhang Guanghao Guo Jian Yang Panpan Zhang Yan Zhang Xicheng Wang Hong Zhao Tingjie Cao Zhiyong Liu | 2018 | The Crop Journal2018，6，1： | 5 |
| 12 | High-speed visual target tracking with mixed rotation invariant description and skipping searching显示文摘This paper proposes a novel high-speed visual target tracking system based on mixed rotation invariant description(MRID) and skipping searching method. MRID is a novel rotation invariant description of texture and edge information by annular histograms and dominant direction. It overcomes rotation variant and large computation issues in conventional LBP-HOG feature description. The skipping searching method used in tracking can remarkably decrease the computation time by avoiding repeated searching operations.The proposed tracking system contains an image sensor, a hierarchical vision processor and an actuator with2 dimensions of freedom(DOF). The vision processor integrates processors with pixel-and row-level parallelism to speed up the tracking algorithm. Experiment results show that the proposed system can achieve over 1000-fps processing speed of the tracking algorithm under 750 × 480 resolution image. | Yongxing YANG Jie YANG Zhongxing ZHANG Liyuan LIU Nanjian WU | 2017 | Science China(Information Sciences)2017，60，6： | 5 |
| 13 | Modeling and Experimental Validation of the Electron Beam Selective Melting Process显示文摘 | Wentao Yan Ya Qian Weixin Ma Bin Zhou Yongxing Shen Feng Lin | 2017 | Engineering2017，3，5： | 5 |
| 14 | THE ZONAL DISINTEGRATION MECHANISM OF SURROUNDING ROCK AROUND DEEP SPHERICAL TUNNELS UNDER HYDROSTATIC PRESSURE CONDITION: A NON-EUCLIDEAN CONTINUUM DAMAGE MODEL显示文摘A new non-Euclidean continuum damage model is proposed to investigate the zonal disintegration phenomenon of the surrounding rocks around deep spherical tunnels under hydrostatic pressure condition as well as the total elastic stress field distributions.The elastic stress fields of the surrounding rocks around deep spherical tunnels under hydrostatic pressure condition are obtained.If the elastic stresses of the surrounding rocks satisfy the strength criterion of the deep rock masses,the number,size and location of fractured and nonfractured zones are determined.The efect of physico-mechanical parameters of the surrounding rocks on the zonal disintegration phenomenon is studied and numerical computation is carried out.It is found from numerical results that the number,size and location of fractured and non-fractured zones are sensitive to the physico-mechanical parameters of the surrounding rocks. | Xiaoping Zhou Qinghong Hou Qihu Qian Yongxing Zhang | 2013 | Acta Mechanica Solida Sinica2013，26，4： | 4 |
| 15 | Satellite Positioning and Orbit Determination System(SPODS):Introduction and Evaluation显示文摘The Satellite Positioning and Orbit Determination System(SPODS)is a software package for GNSS positioning/orbit determination,developed by the Xi’an Research Institute of Surveying and Mapping.So far it has been able to analyse GPS data and has the capability of high precision GPS positioning and orbit determination.The underlying theory and the performance evaluation are briefly addressed in this paper.The experiments are carried out with GPS data collected from about 127 IGS stations during 4~10 January 2009.The results show that the RMS 1D difference is 1.1 cm between SPODS orbits and final IGS combined orbits,and that the repeatability of daily solutions of station coordinates is 1.5 mm for horizontal components,and 4.5 mm for vertical component,and that the consistency of ERP solutions with IGS final products is 0.025 mas,0.093 mas and 0.013 ms/d respectively for pole coordinates and LOD. | Ziqing WEI Rengui RUAN Xiaolin JIA Xianbing WU Xiaoyong SONG Yue MAO Laiping FENG Yongxing ZHU | 2018 | Journal of Geodesy and Geoinformation Science2018，1，1： | 4 |
| 16 | Design of an Enhanced Sensitivity FBG Strain Sensor and Application in Highway Bridge Engineering显示文摘紧张传感器被给,并且而且高取得资格,拉紧传感器的提高的敏感纤维栅栏(FBG ) 的理论设计方法被开发并且制作,谁的察觉到性质对实际应用程序好。有圆柱的壳封装的紧张传感器包含了三管状的结构,由于不平的表面结构,在紧张集中的区域,改进敏感。它能完成埋入紧张测量和表面测量并且有容易的安装的优点。好协议在大小和理论模拟结果之间被获得。在每刻度测试以后, 24 个 FBG 紧张传感器和六个 FBG 温度赔偿传感器在 Yongtaiwen 高速公路在 Diaoshuiyan 桥牌的盒子 girder 的下面上被安装了。最后,我们为高速公路桥建立了一个长期的结构健康系统。 | Litong LI Dongsheng ZHANG Hui LIU Yongxing GUO Fangdong ZHU | 2014 | Photonic Sensors2014，4，2： | 4 |
| 17 | Magnetically responsive photonic films with high tunability and stability显示文摘我们与显著地高的 photonic 稳定性表明有磁力地装配的一个维的像链的 photonic nanostructures 的制造。钥匙躺在 agarose hydrogel 的使用阻止磁性的集会的凝结。当暴露了到一个外部磁场时,否定地控告的 Fe <潜水艇class=“ a-plus-plus ”> 3 O <潜水艇class=“ a-plus-plus ”> 4 @SiO 2 个粒子能有效地与内部频率和显示集合在 hydrogel 矩阵进一个维的链一快,充分可逆,并且对外部地里的变化的悦耳的 photonic 反应。有效地从 agarose 网络结合的位的阻碍者和氢限制 Fe 的移植 < 潜水艇 class= “ a-plus-plus ” > 3 O < 潜水艇 class= “ a-plus-plus ” > 4 @SiO 2 个 粒子和他们的像链的集会。作为结果,系统在大坡度的外部磁场下面在 photonic 反应显示出显著稳定性,以前是挑战的一些东西。在一个长时期上稳定磁性的粒子集会的能力向如此的地应答的 photonic 材料的实际应用代表主要迈进。 | Yongxing Hu Le He Xiaogang Han Mingsheng Wang Yadong Yin | 2015 | Nano Research2015，8，2： | 4 |
| 18 | THE CONSTITUTIVE RELATION OF CRACK-WEAKENED ROCK MASSES UNDER AXIAL-DIMENSIONAL UNLOADING显示文摘An accurate and effcient numerical method for solving the crack-crack interaction problem is presented. The method is mainly by means of the dislocation model, stress superposition principle and Chebyshev polynomial expansion of the pseudo-traction. This method can be applied to compute the stress intensity factors of multiple kinked cracks and multiple rows of periodic cracks as well as the overall strains of rock masses containing multiple kinked cracks under complex loads. Many complex computational examples are given. The dependence of the crack-crack interaction on the crack configuration, the geometrical and physical parameters, and loads pattern, is investigated. By comparison with numerical results under confining pressure unloading, it is shown that the crack-crack interaction under axial-dimensional unloading is weaker than those under confining pressure unloading. Numerical results for single faults and crossed faults show that the single faults are more unstable than the crossed faults. It is found from numerical results for different crack lengths and different crack spacing that the interaction among kinked cracks decreases with an increase in length of the kinked cracks and the crack spacing under axial-dimensional unloading. | Xiaoping Zhou Qihu Qian Yongxing Zhang | 2008 | Acta Mechanica Solida Sinica2008，21，3： | 4 |
| 19 | Differences of cadmium absorption and accumulation in selected vegetable crops显示文摘A pot experiment and a sandy culture experiment grown with three vegetable crops of Chinese cabbage ( B. chinensis L., cv. Zao\|Shu 5), winter greens ( B.var.rosularis Tsen et Lee, cv. Shang\|Hai\|Qing) and celery ( A.graveolens L. var. dulce DC., cv. Qing\|Qin) were conducted, respectively. The initial soil and four incubated soils with different extractable Cd (0.15, 0.89, 1.38, 1.84 and 2.30 mg Cd/kg soil) were used for the pot experiment. Five treatments were designed (0, 0.0625, 0.125, 0.250 and 0.500 mg Cd/L) in nutrient solution in the sandy culture experiment. Each treatment in pot and sandy culture experiments was trireplicated. The objectives of the study were to examine Cd accumulation in edible parts of selected vegetable crops, its correlation with Cd concentrations in vegetable garden soil or in nutrient solution, and evaluate the criteria of Cd pollution in vegetable garden soil and in nutrient solution based on the hygienic limit of Cd in vegetables. Cadmium concentrations in edible parts of the three selected vegetable crops were as follows: 0.01—0.15 mg/kg fresh weight for Chinese cabbage, 0.02—0.17 mg/kg fresh weight for winter greens, and 0.02—0.24 mg/kg fresh weight for celery in the pot experiment, and 0.1—0.4 mg/kg fresh weight for Chinese cabbage, 0.1—1.4 mg/kg fresh weight for winter greens, and 0.05—0.5 mg/kg fresh weight for celery in the pot experiment(except no\|Cd treatment). The order of the three test vegetable crops for cadmium accumulation in the edible parts was celery>winter greens>Chinese cabbage in both the pot experiment and the sandy culture experiment. Cadmium accumulation in edible parts or roots of the vegetable crops increased with increasing of cadmium concentration in the medium(soil or nutrient solution). And cadmium concentrations in edible parts of the test vegetable crops were significantly linearly related to the Cd levels in the growth media (soil and nutrient solution). Based on the regression equations established and the limit of cadmium concentration in vegetable products, the thresholds of Cd concentration in the growth medium evaluated was as follows: 0.5 mg/kg soil of extractable Cd for soil and 0.02 mg /L for nutrient solution. The high capacity for cadmium accumulation in the edible parts of different vegetable crops together with the absence of visual symptoms implies a potential danger for humans. | NiWZ YongXE | 2002 | Journal of Environmental Sciences2002，14，3： | 4 |
| 20 | Do institutional investors have superior stock selection ability in China?显示文摘This paper uses unique data on the shareholdings of both institutional and individual investors to directly investigate whether institutional investors have better stock selection ability than individual investors in China.Controlling for other factors,we find that institutional investors increase(decrease)their shareholdings in stocks that subsequently exhibit positive(negative)short-and long-term cumulative abnormal returns.In contrast individual investors decrease(increase)their shareholdings in stocks that subsequently exhibit positive(negative)short-and long-term cumulative abnormal returns.These findings indicate that institutional investors have superior stock selection ability in China. | Yihong Deng Yongxing Xu | 2011 | China Journal of Accounting Research2011，，3： | 3 |
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