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Geology,Mineralogy,and Isotopic Characteristics of the Zhonghe Ag-Pb-Zn Deposit,Western Henan Province,Central China

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Journal of Earth Science 2022年第1期33卷 177-192页

作者： Jiannan xu changqian Ma Shuo Yin Yunzhen chang Huimin Jia Zhongjie Wang Liangliang shi State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan 430074China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China No.1 Institute of Geological and Mineral Resources Survey Henan Bureau of Geo-Exploration&Mineral DevelopmentLuoyang 471000China

Located in Luoning County,western Henan Province,Central China,the Zhonghe Ag-Pb-Zn ore field,is a newly discovered deposit in the Xiaoshan *** bodies controlled by NNW Faults occur as veins within the Paleoproterozoic Xiong’er Group or the Early Cretaceous porphyritic *** that the Zhonghe deposit has been covered by thick Quaternary sediments,the paragenetic mineral assemblage was determined mainly by microscopic observations,including the quartzsiderite-pyrite alteration (StageⅠ),polymetallic sulfide precipitation (StageⅡ),silver mineralization(Stage Ⅲ),and quartz-carbonate stage (StageⅣ).The host minerals for silver are diverse,such as freibergite,pyrargyrite,polybasite,argyrodite,canfieldite,argentite,and native silver,whereas those for Pb and Zn are galena and sphalerite,*** order to constrain the ore-forming components of the Zhonghe deposit,a combined in-situ analysis was conducted on represented sulfides from StageⅡand Stage Ⅲ.In-situ δ^(34)S values of the analyzed sulfides,including the pyrite,chalcopyrite,sphalerite,and galena,display a relatively narrow range (0.90‰-5.0‰),which is close to magmatic sulfur *** ^(206)Pb/^(204)Pb and^(207)Pb/^(204)Pb ratios show a narrow range (17.140-17.360 and 15.385-15.490),whereas the ^(208)Pb/^(204)Pb ratios exhibit a broad variation (36.601-37.943),indicating a contamination of the Xiong’er *** of geochronological and geochemical data from the Xiaoshan District,we contend that the ore-forming materials of the Zhonghe Ag-Pb-Zn deposit are originated from the lower crust,which has presumably been influenced by the large-scale lithospheric delamination of the eastern North China Craton during the Early *** consideration of the geological setting,mineralogy,and geochemical compositions,we suggest that the Zhonghe Ag-Pb-Zn deposit is characterized as intermediate sulfidation type epithermal deposit,and may be a potential exploration target for porphyry Mo-Cu deposi

关键词： S-Pb isotopes Ag-Pb-Zn deposit metal source isotopes ore deposit geology

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Oxymatrine liposome attenuates hepatic fibrosis via targeting hepatic stellate cells

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World Journal of Gastroenterology 2012年第31期18卷 4199-4206页

作者： Ning-Li Chai Qiang Fu Hui shi chang-Hao Cai Jun Wan shi-Ping xu Ben-Yan Wu Department of Gastroenterology South Build-ing of Chinese People's Liberation Army General Hospital Bei-jing 100853 China Department of Gastroenterology Xi'an Children'sHospital Xi'an 710002 Shaanxi Province China

AIM： To investigate the potential mechanism of Arg- Gly-Asp （RGD） peptide-labeled liposome loading oxy- matrine （OM） therapy in CCI4-induced hepatic fibrosis in rats. METHODS： We constructed a rat model of CCh- induced hepatic fibrosis and treated the rats with dif- ferent formulations of OM. To evaluate the antifibrotic effect of OM, we detected levels of alkaline phospha- tase, hepatic histopathology （hematoxylin and eosin stain and Masson staining） and fibrosis-related gene expression of matrix metallopeptidase （MMP）-2, tis- sue inhibitor of metalloproteinase （TIMP）-I as well as type I procollagen via quantitative real-time poly- merase chain reaction. To detect cell viability and apop- tosis of hepatic stellate cells （HSCs）, we performed 3-（4,5）-dimethylthiahiazo（-z-yl）-3,5-diphenytetrazoli- umromide assay and flow cytometry. To reinforce the combination of oxymatrine with HSCs, we constructed fluorescein-isothiocyanate-conjugated Arg-Gly-Asp peptide-labeled liposomes loading OM, and its targeting of HSCs was examined by fluorescent microscopy. RESULTS： OM attenuated CCh-induced hepatic fibro- sis, as defined by reducing serum alkaline phosphatase （344.47± 27.52 U/L vs 550.69 ± 43.78 U/L, P 〈 0.05）, attenuating liver injury and improving collagen deposits （2.36% ± 0.09% vs 7.70% ±0.60%, P 〈 0.05） and downregulating fibrosis-related gene expression, that is, MMP-2, TIMP-1 and type I procollagen （P 〈 0.05）. OM inhibited cell viability and induced apoptosis of HSCs in vitro. RGD promoted OM targeting of HSCs and en- hanced the therapeutic effect of OM in terms of serum alkaline phosphatase （272.51 ± 19.55 U/L vs 344.47 ± 27.52 U/L, P 〈 0.05）, liver injury, collagen deposits （0.26%± 0.09% vs 2.36% ± 0.09%, P 〈 0.05） and downregulating fibrosis-related gene expression, that is, MMP-2, TIMP-1 and type I procollagen （P 〈 0.05）. Moreover, in vitro assay demonstrated that RGD en- hanced the effect of OM on HSC viability and apoptosis. CONCLUSION： OM attenuated hepatic fi

关键词： Oxymatrine Arg-Gly-Asp peptide Hepaticstellate cell Hepatic fibrosis Target therapy

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HL-2A 装置边缘湍流与带状流相互作用的实验研究

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核聚变与等离子体物理 2024年第1期44卷 72-77页

作者：方茜程钧王威策严龙文黄治辉吴娜许宇鸿唐昌建石中兵钟武律许敏西南交通大学物理科学与技术学院成都610031 核工业西南物理研究院成都610041

利用组合静电探针阵列研究了HL-2A装置中湍流与带状流相互作用的动力学过程。实验结果表明,在粒子注入后的等离子体恢复阶段,边界区径向电场剖面逐渐变陡,湍流相干尺度和带状流幅度相应增加,而湍流强度随之降低。这些实验提供了带状流... 详细信息

利用组合静电探针阵列研究了HL-2A装置中湍流与带状流相互作用的动力学过程。实验结果表明,在粒子注入后的等离子体恢复阶段,边界区径向电场剖面逐渐变陡,湍流相干尺度和带状流幅度相应增加,而湍流强度随之降低。这些实验提供了带状流与边缘湍流相互作用的直接实验证据,暗示了能量转移是引起带状流增长的主要原因。

关键词：托卡马克带状流湍流输运静电探针双谱分析

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鼠李科植物枣多糖的活性机制及其结构特征研究进展

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中国药科大学学报 2024年第4期55卷 443-453页

作者：董小强文畅许金丹史乐雪胡玉龙李杰明董春红丁侃河南中医药大学中医药科学院郑州450046 河南省中药多糖工程研究中心郑州450046 河南省中药多糖及其创新药物研究中医药重点实验室郑州450046 中国科学院上海药物研究所中科中山药物创新研究院中山528400

鼠李科枣属植物包含原变种枣(Ziziphus jujuba ***)、无刺枣(Ziziphus jujuba ***)、酸枣(Ziziphus jujuba ***)等许多品种,而其中大枣在全国各地有最丰富的栽培变种,如哈密大枣、黄河滩枣等。枣属植物品种丰富且药食两用,多糖作为枣的... 详细信息

鼠李科枣属植物包含原变种枣(Ziziphus jujuba ***)、无刺枣(Ziziphus jujuba ***)、酸枣(Ziziphus jujuba ***)等许多品种,而其中大枣在全国各地有最丰富的栽培变种,如哈密大枣、黄河滩枣等。枣属植物品种丰富且药食两用,多糖作为枣的主要活性成分之一,是其发挥功效的重要药效物质基础。枣多糖已被发现具有促造血、抗氧化、抗肿瘤、修复肝损伤、免疫调节、抗炎等多种药理活性。本文通过对不同品种和不同产地来源的枣类多糖文献进行全面归纳分析,综述了枣多糖发挥生物活性的潜在作用机制,汇总了枣多糖相对分子质量、单糖组成、糖残基连接方式等一级结构特征,并对枣多糖硫酸化、磷酸化、羧甲基化、硒化、乙酰化的取代基修饰进行总结,以期为枣类在多糖创新药物、功能食品等领域的研究与开发利用提供参考。

关键词：枣多糖生物活性机制结构分析结构改造

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Effect of austenization temperature on the microstructure evolution of the medium manganese steel (0.2C-5Mn) during ART-annealing

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Acta Metallurgica Sinica(English Letters) 2012年第2期25卷 111-123页

作者： Jie shi Haifeng xu Jie ZHAO Wenquan CAO chang WANG Cunyu WANG Jian LI Han DONG National Engineering Research Center of Advanced Steel Technology Central Iron and Steel Research Institute Beijing 100081 China School of Materials Science and Engineering State Key Laboratory of Material Processing and Die Mould Technology Huazhong University of Science and Technology Wuhan 430074 China

Microstructure evolution during ART-annealing （austenite reverted transformation annealing） of 0.2C-5Mn steel processed by austenitation at different temperatures was examined by SEM, TEM and XRD. It was demonstrated that the initial mi- crostructures resulted from austenization at different temperatures strongly affect the microstructure evolution during followed ART-annealing, even the ultrafine grained ferrite/austenite duplex structure with about 30% austenite could be obtained af- ter long time ART-annealing in all cases. Austenization in the intercritical region （between Ad and At3） gave a duplex structure after quenching, which was nearly not affected by followed annealing process. However, high temperature austenization （above A^3） resulted in a full martensite structure after quenching, which gradually transformed into a ferrite/austenite duplex structure during the following anneal- ing process. Based on the analysis of austenite fraction and carbon concentrate, it was found that not only carbon partitioning but also manganese paxtitioning in the austenite affected the stability of austenite and even dominated the development of lamellar ferrite and austenite duplex structure during intercritical annealing with different times. At last an austenite lath nucleation and thickening model was pro- posed to describe the microstructure evolution of medium mangenese steel during ART-annealing.

关键词： Austenization temperature ART-annealing Microstructure evolution Carbon and manganese partitioning Lamellar duplex structure

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Photoluminescence properties of blue and green multiple InGaN/GaN quantum wells

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Chinese Physics B 2019年第10期28卷 541-545页

作者： chang-Fu Li Kai-Ju shi Ming-Sheng xu Xian-Gang xu Zi-Wu Ji School of Microelectronics Shandong UniversityJinan 250100China School of Physics and Electronic Engineering Taishan UniversityTaian 271000China Key Laboratory of Functional Crystal Materials and Devices(Ministry of Education) Shandong UniversityJinan 250100China

The photoluminescence(PL) properties of blue multiple InGaN/GaN quantum well(BMQW) and green multiple InGaN/GaN quantum well(GMQW) formed on a single sapphire substrate are investigated. The results indicate that the peak energy of GMQW-related emission(PG) exhibits more significant "S-shaped" dependence on temperature than that of BMQW-related emission(PB), and the excitation power-dependent carrier-scattering effect is observed only in the PG emission;the excitation power-dependent total blue-shift(narrowing) of peak position(line-width) for the PGemission is more significant than that for the PBemission;the GMQW shows a lower internal quantum efficiency than the BMQW. All of these results can be attributed to the fact that the GMQW has higher indium content than the BMQW due to its lower growth temperature and late growth, and the higher indium content in the GMQW induces a more significant compositional fluctuation, a stronger quantum confined Stark effect, and more non-radiative centers.

关键词： photoluminescence multiple quantum wells localization effect light-emitting diodes

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Syntheses and Crystal Structures of Two Coordination Polymers with Aromatic Dioxide as Bridge Ligands

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Chinese Journal of Structural Chemistry 2007年第2期26卷 214-218页

作者： shi Jing-Min xu Hai-Yan ZHANG Feng-Xia WU chang-Ju LIU Lian-Dong Department of Chemistry Shandong Normal University Jinan 250014 China

Two coordination polymers, namely, two-dimensional complex 1 {[Cu（μ- L）1.5（ClO4）2（H2O）].（H2O）0.5]n （L = pyrazine-1,4-dioxide） and one-dimensional complex 2 [Co（μ-L）Br2（H2O）2]n, have been synthesized with pyrazine-1,4-dioxide as bridging ligands, and their crystal structures were determined by X-ray crystallography. Crystal data for complex 1： monoclinic system, space group C2/c, with a = 23.310（3）, b = 12.2338（17）, c = 10.6075（15） A, β= 110.487（2）°, V = 2833.6（7） A3, Z = 8, C6H9C12CuN3O12.5, Mr = 457.60, Dc = 2.145 g/cm^3, F（000） = 1832 and μ = 1.998 mm^-1; and those for 2： monoclinic system, space group C2/c, with a = 11.012（3）, b = 7.483（2）, c = 11.451（3） A, β = 101.654（4）°, V = 924.2（4） A3, Z = 4, C4HsBr2CoN2O4, Mr = 366.87, Dc = 2.637 g/cm^3, F（000） = 700 and μ = 10.487 mm^-1. 1 shows a two-dimensional sheet structure on the ac plane through the coordination of μ-L bridging ligands with Cu（Ⅱ） ions, while 2 displays a zigzag one-dimensional chain along the c axis via the coordination of μ-L bridging ligand with Co（Ⅱ） ions. Hydrogen bonds in 1 and 2 make the sheets （or chains） connect each other to form a three-dimensional structure.

关键词： Aromatic Dioxide coordination polymers Hydrogen bonds

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Electron Branching Ratios Following Autoionization of the Ba 6pns States

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Chinese Physics Letters 2001年第4期18卷 516-518页

作者： LV Jun DAI chang-Jian xu Yun-Fei LI shi-Ben Department of Physics Zhejiang UniversityHangzhou 310027

The excitation spectra and branching ratios of ejected electrons of the Ba 6pns(J=1)autoionizing states are measured using multistep laser excitation scheme and time-of-flight electron *** energy dependence of branching ratios of Ba+6s state on energy is determined for the low-lying 6p1/2,3/2ns states,and compared with a previous R-matrix calculation.

关键词： spectroscopy. calculation. branching

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Perturbed 6snd ^(1,3)D_(2) Rydberg Series of Neutral Barium

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Chinese Physics Letters 2001年第9期18卷 1192-1195页

作者： Lü Jun DAI chang-Jian xu Yan-Fgi LI shi-Ben Department of Physics Zhejiang UniversityHangzhou 310027

The Ba even-parity J = 2 spectrum has been studied by using an autoionization approach. Energy levels of the Ba 6snd ^(1,3)D_(2) Rydberg states have been measured and interpreted by the multichannel quantum defect ***... 详细信息

关键词： theory Rydberg parity

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高压电缆接地系统缺陷快速定位分析

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电线电缆 2024年第4期67卷 83-86页

作者：谢强宋熙刘畅施兢业徐子涵国网江苏省电力有限公司常州供电分公司常州213000

高压电缆金属护层电流检测是发现接地系统异常的有效手段,但应用在快速定位缺陷时存在不足。文中以一起220 kV高压电缆接地系统异常为案例,研究高压电缆金属护层接地回路电阻检测的原理。当高压电缆金属护层接地电流出现异常时,利用接... 详细信息

高压电缆金属护层电流检测是发现接地系统异常的有效手段,但应用在快速定位缺陷时存在不足。文中以一起220 kV高压电缆接地系统异常为案例,研究高压电缆金属护层接地回路电阻检测的原理。当高压电缆金属护层接地电流出现异常时,利用接地回路电阻测试方法不断缩小缺陷所在范围,锁定在第二个交叉互联段,最终发现3#中间接头直接接地点存在紧固螺栓锈蚀和脱落的缺陷,随后快速组织完成消缺。结果表明,高压电缆金属护层接地回路电阻检测法能够高效发现并定位高压电缆接地系统缺陷。最后,根据案例经验,提出避免类似情况发生的建议。

关键词：高压电缆金属护层缺陷接地回路电阻

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