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68篇 您的检索式:作者名="ZhiZhang"
    题名 作者 年代 出处 被引量
1The Discovery of Natural Native Uranium and Its Significance显示文摘This study analyzed the composition and uranium valence of pitchblendes sampled from the hydrothermal Guidong and Zhuguang uranium deposits of the middle Nanling metallogenic belt, Southern China using X-ray photoelectron spectroscopy(XPS).A revolutionary discovery is that the uranium not only exists in the forms of tetravalent and hexavalent uranium oxides, but also occurs in the form of native uranium.This is the first discovery of the existence of native uranium in nature.It greatly helps to reveal the origin of hydrothermal mineralization of uranium, and also has great significance for studying the thermal energy, formation and evolution of the earth.LI Ziying HUANG Zhizhang LI Xiuzhen GUO Jian FAN Chou 2015Acta Geologica Sinica(English Edition)2015,89,5:8
2Mutation of kri1l causes definitive hematopoiesis failure via PERK-dependent excessive autophagy induction显示文摘Xiao-E Jia Ke Ma Tao Xu Lei Gao Shuang Wu Cong Fu Wenjuan Zhang Zhizhang Wang Kaiyu Liu Mei Dong Changbin Jing Chunguang Ren Zhiwei Dong Yi Chen Yi Jin Qiuhua Huang Xing Chang Min Deng Li Li Lingfei Luo Jun Zhu Yongjun Dang Hung-Chun Chang Leonard I Zon Yi Zhou Saijuan Chen Weijun Pan 2015Cell Research2015,25,8:8
3Effect of operation-synchronizing transfusion of apoptotic spleen cells from donor rats on acute rejection of recipient rats after liver transplantation显示文摘AIM: To study effect of operation-synchronizing transfusion of apoptotic spleen cells from donor rats on acute rejection of recipient rats after liver transplantation.METHODS: Two of Wistar rats were chosen randomly for normal liver pathology control and ten of SD rats chosen randomly for liver function control as blank group (no operation). The rest of Wistar and SD rats were divided into four groups: control group (only liver transplantation),Dex group (donors receiving intraperitoneal injection of dexamethasone), SpC group (recipients receiving infusion of spleen cells of donors), Dex-SpC group (recipients receiving infusion of apoptotic spleen cells of donors),with each group except blank group, containing 10 SD rats and 10 Wistar rats, respectively. Wistar rats received liver transplantation from SD rats, in the meantime they received infusion of spleen cells of donors, which were induced by an intraperitoneal injection of dexamethasone The serum alanine transaminase (ALT), total bilirubin (T bili), liver pathological changes and survival time were analysed. Statistical analysis was carried out using SPSS 10.0 for Windows. Differences of the parametric data of ALT in means were examined by one-way ANOVA.Differences of ALT between two groups were examined by LSD. Differences of the nonparametric data of T bili in means and scores of pathology classification for acute rejection were examined by Kruskal-Willis H test. The correlations between ALT and T bili were analysed by Bivariate. Kaplan-Meier curves were used to demonstrate survival distribution. The log-rank test was used to compare the survival data.RESULTS: There were significant differences in ALT of the five groups (F= 23.164 P= 0.000), and ALT in DexSpC group was significantly higher than that in blank control, control, Dex, and SpC groups (P = 0.000), and ALT in SpC group was significantly higher than that in blank control (P = 0.000), control (P = 0.004), and Dex groups (P = 0.02). Results of nonparametric analysis of T bili showed that there were differences in T bili of the five groups (χ2 = 33.265 P= 0.000). T bili in Dex-SpC group was significantly higher than that in blank control, control,Dex, and SpC groups. T bili in SpC group was higher than that in blank control, control, and Dex groups. There were significant differences in scores of pathology classification for acute rejection in each of the groups (χ2 = 25.933,P = 0.000). The pathologically more serious acute rejection was found in Dex-SPC group than in other groups. No sign of acute rejection was observed in the blank control group.Slight acute rejection was observed in the control group.Slight-moderate acute rejection was observed in the Dex group. Moderate-acute rejection was observed in the SpC group. Severe-acute rejection was observed in the DexSpC group. The survival time in Dex-SpC group was shorter than in other groups (statistic = 11.13, P = 0.011). ALT and T bili were positively correlated (r= 0.747, P= 0.000,two-tailed).CONCLUSION: In order to reduce quantity of blood loss from rats after liver transplantation, only one of ALT or T bili is needed for liver function measurement of rats.Simultaneous injection of apoptotic spleen cells from donors induced by dexamethasone to liver transplantation rats aggravates acute rejection. One important mechanism of aggravation of acute rejection may be that apoptotic cells are not removed in time and that dead cells including apoptotic cells release inflammatory factors.JingLiu ShuanWang Er-WeiSun YuWang ZhiZhang Yi-QiangShan Shi-ZhengZhong 2005World Journal of Gastroenterology2005,11,8:7
4Thickness of calcium carbonate coats on stones of the Heishanxia terraces of the Yellow River and dating of coarse clastic sedimentary geomorphic surfaces显示文摘The calcium carbonate coats on stones developed in soil on the geomorphic surfaces of coarse clastic sediments in arid-semiarid regions contain evident information of age. The thickness of coats can be used not only as a good age indicator for the geomorphic surfaces but also coats themselves can be directly used as dating materials in the ESR method. Through measuring the thickness of carbonate coats on stones in soils on the alluvial terraces in the mouth of the Heishanxia gorge of the Yellow River and ESR dating of layers separated from the carbonate coats, the average of accumulation rates of the thickness of carbonate coats on stones since 1.57 Ma was calculated to be 0.10 mm/ka in the studied area, and a regression equation between carbonate coat thickness and age was also generated. From these research results, ages of T2-T11 terraces of the Yellow River in the studied area were systematically determined, and their values are in turn 18 ka, 94 ka, 139 ka, 215 ka, 305 ka, 410 ka, 495 ka, 742 ka,Chengqi Xing Gongming Yin Guoyu Ding Yanchou Lu Xuhui Shen Qinjian Tian Zhizhang Chai Kaibo Wei 2002Chinese Science Bulletin2002,47,19:7
5Protein kinase C-dependent activation of P44/42 mitogen-activated protein kinase and heat shock protein 70 in signal transduction during hepatocyte ischemic preconditioning显示文摘AIM: To investigate the significance of protein kinase C (PKC), P44/42 mitogen-activated protein kinase (MAPKs) and heat shock protein (HSP)70 signal transduction during hepatocyte ischemic preconditioning. METHODS: In this study we used an in vitro ischemic preconditioning (IP) model for hepatocytes and an in vivo model for rat liver to investigate the significance of protein kinase C (PKC), P44/42 mitogen-activated protein kinase (P44/42 MAPKs) and heat shock protein 70 (HSP70) signal transduction in IP. Through a normal liver cell hypoxic preconditioning (HP) model in which cultured normal liver cells were subjected to 3 cycles of 5 rain of incubation under hypoxic conditions followed by 5 rain of reoxygenation and subsequently exposed to hypoxia and reoxygenation for 6 h and 9 h respectively. PKC inhibitor, activator and MEK inhibitor were utilized to analyze the phosphorylation of PKC, the expression of P44/42 MAPKs and HSP70. Viability and cellular ultrastructure were also observed. By using rat liver as an in vivo model of liver preconditioning (3 cycles of 10-min occlusion and 10-min reperfusion), in vivo phosphorylation of PKC and P44/42MAPKs, HSP70 expression were further analyzed. AST/ALT concentration, cellular structure and ultrastruture were also observed. All the data were statistically analyzed. RESULTS: Similar results were obtained in both in vivo and in vitro IP models. Compared with the control withouts IP (or HP), the phosphorylation of PKC and P44/42 MAPKs and the expression of HSP70 were obviously increased in IP (or HP) treated model in which cytoprotection could be found. The effects of preconditioning were mimicked by stimulating PKC with 4β phorobol-12-myristate 13-acetate (PMA). Conversely, inhibiting PKC with chelerythrine abolished the protection given by preconditioning. PD98059, inhibitor of MEK (the upstream kinase of P44/42MAPKs), also reverted the cytoprotection exerted by preconditioning. CONCLUSION: The results demonstrate that preconditioning induces a rapid activation of P44/421VlAPKs and PKC activation plays a pivotal role in the activation of P44/42 MAPKs pathway that participates in the preservation of liver cells. HSP expression is regulated by signals in PKC dependent P44/42 MAPKs pathway.YiGao Yu-QiangShan Ming-XinPan YuWang Li-JunTang HaoLi ZhiZhang 2004World Journal of Gastroenterology2004,10,7:5
6Structure and quality controlled growth of InAs nanowires through catalyst engineering显示文摘在这研究,结构和用在一个分子的横梁取向附生反应堆的 Au 催化剂的 InAs nanowires 的 quality controlled 生长被介绍。由在催化剂调节铟集中,没有缺点的 wurtzite 结构和没有缺点的锌闪锌矿结构 InAs nanowires 能被导致。这些没有缺点的锌闪锌矿结构 InAs nanowires 沿着\成长,这被发现( \left\langle { \bar 1 \bar 10 } \right\rangle \)方向与四低精力{ 111 }并且二{ 110 }方面墙方面并且采用\( \left ({ \bar 1 \bar 1 \bar 1 } \right )\) catalyst/nanowire 接口。我们的结构、化学的描述和计算为 InAs nanowire 生长识别催化剂过度饱和阀值的存在。什么时候在里面在催化剂的集中足够地高,没有缺点的锌闪锌矿结构 InAs nanowires 能被导致。这研究通过催化剂工程提供卓见进晶体结构的操作和 IIIV 半导体 nanowires 的结构质量。ZhiZhang Zhenyu Lu Hongyi Xu Pingping Chen Wei Lu Jin Zou 2014Nano Research2014,7,11:4
7PREPARATION AND MICROSTRUCTURE OF NANO-SIZED Cu PARTICLES BY MECHANOCHEMICAL REACTION显示文摘1INTRODUCTIONThemetalparticlewithsizeof1~1000nmiscaledsuperfinemetalparticle.Sincethesuperfinemetalparticleshavesignificantp...Wu Nianqiang, Su Lizhi, Yuan Mingyong , Liu Yuyong, Wu Jinming and Li Zhizhang Department of Materials Science and Engineering Center of Measure and Analysis, Zhejiang University, Hangzhou 310027, P. R. China 1998中国有色金属学会会刊:英文版1998,8,4:3
8A primary study of simultaneous leaching of silver containing manganese ore and a sphalerite concentrate显示文摘It is demonstrated that a low grade, silver containing manganese deposit can be exploited by reaction with a ZnS concentrate. In the process, Mn(IV) is reduced to Mn(II) and the ZnS converted to ZnSO4. In the process, Mn and Zn are solubilized. By studying the effects of quantity of reducing agent and sulfuric acid added and of time, temperature and liquid-to-solid ratio on the leaching process, the optimum technological conditions have been achieved under which the amount of manganese leached was 98 %. The silver can be removed from remaining solids by adding ammonia liquor. Then by adding hydrazine hydrate, sponge silver with purity up to 99 % can be obtained with a recovery of 87 %.Li Zhizhang Li Yanjun 2008Engineering Sciences2008,6,3:2
9Porous polybenzimidazole membranes with positive charges enable an excellent anti-fouling ability for vanadium-methylene blue flow battery显示文摘A cost-effective, high-performance and highly stable membrane has always been in intensively needed in aqueous organic-based flow batteries. Here we present a porous polybenzimidazole(PBI) membrane with positive charges that endow the membrane with a high rejection and an excellent anti-fouling ability for target organic molecule and asymmetric structure that affords a high conductivity for vanadiummethylene blue flow battery(V-MB FB). The morphologies and thickness of separating layer in particular of the porous PBI can be well adjusted by simply altering the polymer concentration in the cast solution and further afford the membrane with a controllable property in terms of both ion selectivity and ion conductivity. As a result, a V-MB FB assembled with a porous PBI membrane delivers a coulombic efficiency(CE) of 99.45% and an energy efficiency(EE) of 86.10% at a current density of 40 mA cm^(-2), which is 12% higher than that afforded by a Nafion 212 membrane. Most importantly, the V-MB FB demonstrates a methylene blue(MB) utilization of 97.55% at a theoretical capacity of 32.16 Ah L^(-1)(based on the concentration of MB in the electrolyte) because of the high ion conductivity of the membrane, which favors reducing the cost of a battery. The results suggest that the designed porous PBI membranes exhibit a very promising prospect for methylene blue-vanadium flow battery.Dongju Chen Guangyu Liu Jie Liu Changkun Zhang Zhizhang Yuan 2022Journal of Energy Chemistry2022,31,5:2
10Metasurface empowered lithium niobate optical phased array with an enlarged field of view显示文摘Integrated optical phased arrays(OPAs) have attracted significant interest to steer laser beams for applications including free-space communications, holography, and light detection and ranging. Although many methods have been proposed to suppress grating lobes, OPAs have also been limited by the trade-off between field of view(FOV)and beamforming efficiency. Here, we propose a metasurface empowered port-selected OPA(POPA), an OPA steered by port selection, which is implemented by an aperiodic waveguide array with an average pitch less than the wavelength and phase controlled by coupling among waveguides. A metasurface layer above the POPA was designed to increase wide FOV steering, aliasing-free by polarization division. As a result, we experimentally demonstrate beam scanning over a ±41.04° × 7.06° FOV. The aliasing-free POPA with expanded FOV shows successful incorporation of the waveguide-based OPA technique with an emerging metasurface design, indicating much exploration in concepts for integrated photonic devices.ZHIZHANG WANG WANGE SONG YUXIN CHEN BIN FANG JITAO JI HAORAN XIN SHINING ZHU TAO LI 2022Photonics Research2022,10,11:2
11Toward the development of three-dimensional unconditionally stable finite difference time domain method 显示文摘Zheng Fenghua Chen Zhizhang Zhang Jiazong 2000IEEE Trans MTT2000,48,9:1
12Patch Loading and Improved Measures of Incremental Launching of Steel Box Gird显示文摘Ye Zhizhang Rudeng Luo 2012Journal of Constructional Steel Research2012,68,:1
13Temporal changes in ventricular function assessed echocardiographically in conscious and anesthetized mice显示文摘Jeffrey N Rottman Gemin Ni Michelle Khoo Zhizhang Wang Wei Zhang Mark E Anderson Ernest C Madu 2003Journal of the American Society of Echocardiography2003,,11:1
14A Relation Between the Average Hamming Distance and the Average Hamming Weight of Binary Codes显示文摘Zhao Zhizhang 2001Journal of Statistical Planning and Inference2001,94,2:1
15Industry Poverty Allevi- ation and Development in Continuous Destitute Areas: Based on the Status Analysis of the Wuling Mountains Region 显示文摘Zhizhang WANG Cuicui HE 2013Studies in Sociology of Science2013,,04:1
16Study of branched cationic β-cyclodextrin polymer/indomethacin complex and its release profile from alginate hydrogel显示文摘Jianyu Xin Zhizhang Guo Xingyu Chen 2010International Journal of Pharmaeeutics2010,386,:1
17A novel and effective PECVD SiO/SiN antireflection coating for Si solar cells显示文摘Chen Zhizhang Peyman Sana Jalal Salami 1993IEEE Transactions on Electron Devices1993,40,6:1
18A Survey of Wi-Fi Sensing Techniques with Channel State Information显示文摘A review of signal processing algorithms employing Wi-Fi signals for positioning and recognition of human activities is presented.The principles of how channel state information(CSI)is used and how the Wi-Fi sensing systems operate are reviewed.It provides a brief introduction to the algorithms that perform signal processing,feature extraction and recognitions,including location,activity recognition,physiological signal detection and personal identification.Challenges and future trends of Wi-Fi sensing are also discussed in the end.MICHEN Liangqin TIAN Liping XU Zhimeng CHEN Zhizhang 2020ZTE Communications2020,18,3:1
19On the numerical stability of the precise integration time-do- main (PITD) method显示文摘JIANG Lele CHEN Zhizhang MAO Junfa 2007IEEE Microwave and Wireless Components Letters2007,17,7:1
20A Ka-Band High-Gain Circularly Polarized Microstfip Antenna Array显示文摘Chen Aixin Zhang Yanjun Chen Zhizhang 2010IEEE Antennas and Wireless Propagation Letters2010,,9:1
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