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一个基于多方秘密共享的代理加密转换信息传送方案

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通信学报 2003年第4期24卷 133-138页

作者：赵福祥赵红云王育民杨世平西安电子科技大学ISn国家重点实验室西安通信学院陕西西安710106 深圳市中兴通讯股份有限公司技术中心研究部广东深圳518004 西安通信学院

在公开的网络中采用匿名连接,使攻击者既窃听不到机密也实施不了流量分析。但现有方案中,使用重复加密和签名同一消息包的方法传送信息必然使系统效率降低;其次,使用常规公钥密码方法仍可使攻击者通过验证密钥等分析原发节点位置。而采... 详细信息

在公开的网络中采用匿名连接,使攻击者既窃听不到机密也实施不了流量分析。但现有方案中,使用重复加密和签名同一消息包的方法传送信息必然使系统效率降低;其次,使用常规公钥密码方法仍可使攻击者通过验证密钥等分析原发节点位置。而采用代理加密转换方法时,其中间节点不用解密就可把密文消息转换成后续节点可接受的密文消息,从而取得更高的隐蔽程度。因此,本文应用多方门限代理加密转换技术,提出了信息传送的新方案并分析了其安全性。

关键词：网络安全信息隐藏匿名路由代理加密转换门限加密转换秘密共享

我国男子坐式排球运动员心理健康状况与社会支持的相关研究

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陕西师范大学学报（自然科学版） 2007年第S2期35卷 104-107页

作者：高晖高鹏华西北大学体育教研部陕西西安710069

以症状自评量表SCL—90和社会支持评定量表SSRS为研究工具,对2005年全国坐式排球锦标赛的男子坐式排球运动员进行了调查研究.结果表明,我国男子坐式排球运动员心理健康水平和社会支持状况明显高于普通残疾人,说明坐式排球运动能满足坐... 详细信息

以症状自评量表SCL—90和社会支持评定量表SSRS为研究工具,对2005年全国坐式排球锦标赛的男子坐式排球运动员进行了调查研究.结果表明,我国男子坐式排球运动员心理健康水平和社会支持状况明显高于普通残疾人,说明坐式排球运动能满足坐式排球运动员的心理需要并且能明显改善他们的心理健康水平.

关键词：坐式排球运动员心理健康普通残疾人社会支持

Application of Cell Penetrating Peptide in Magnetic Resonance Imaging of Bone Marrow Mesenchymal Stem Cells

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Acta Biochimica et Biophysica Sinica 2006年第12期38卷 865-873页

作者： Min LIU~1 You-Min GUO~1 Jun-Le YAnG~1 Peng WAnG~1 Lin-Yu ZHAO~2 nian SHEn~2 Si-Cen WAnG~3.xiao-Juan GUO~1 Qi-Fei WU~2 1 Imaging Center,the 2nd Affiliated Hospital of Medical School,xi'an Jiaotong university,xi'an 710004,china 2 Key Laboratory of Environment and Genes Related to Diseases of Ministry of Education,xi'an Jiaotong university,xi'an 710061,china 3.department of Pharmacy,Medical School,xi'an Jiaotong university,xi'an 710061,china ImagingCenter the2ndAffiliatedHospitalofMedicalSchoolXi'anJiaotongUniversityXi'an710004China KeyLaboratoryofEnvironmentandGenesRelatedtoDiseasesofMinistryofEducation Xi'anJiaotongUniversityXi'an710061China

Tracking the distribution and differentiation of stem cells by high-resolution imaging techniqueswould have significant clinical and research *** this study,a model cell-penetrating peptide wasused to carry gadolinium particles for magnetic resonance imaging (MRI) of mesenchymal stem cells (MSCs).MSCs were isolated from rat bone marrow and identified by osteogenic differentiation in *** cell-penetrating peptide labeled with fluorescein-5-isothiocyanate (FITC) and gadolinium was synthesized by asolid-phase peptide synthesis *** imaging analysis confirmed that this new peptide couldinternalize into the cytoplasm and nucleus at room temperature,4℃ and 3.℃.Gadolinium were efficientlyinternalized into mesenchymal stem cells by the peptide in a time or concentration-dependent manner,resulting in intercellular shortening of longitudinal relaxation enhancements,which were obviously detectedby 1.5 Tesla Magnetic Resonance *** assay and flow cytometric analysis showed thatthe intercellular contrast medium incorporation did not affect cell viability at the tested *** vitro experiment results suggested that the new constructed peptides could be a vector for trackingMSCs.

关键词： mesenchymal stem cells cell-penetrating peptide gadolinium fluorescein magnetic resonance imaging

Synthesis of Symmetric Diketones from Imidazolinium Salt and Bis-Grignard Reagents

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Chinese Chemical Letters 2000年第9期11卷 757-760页

作者： Zhen SHI Lin Gang LU department of Chemistry, northwest university, xi an 710069 nW Univ xian Dept Chem Xian 710069 Peoples R China

The reaction of 2-substituted imidazolinium salt with bis-Grignard reagents is reported and a new method for the synthesis of symmetric diketones from carboxylic acids and bis-Grignard reagents is provided.

关键词： diketones imidazolinium salt bis-Grignard reagents synthesis

Synthesis of GoldMag particles with assembled structure and their applications in immunoassay

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Science china Chemistry 2006年第6期49卷 534-540页

作者： CUI Yali1, ZHAnG Lianying1, SU Jing1, ZHAnG Caifeng3. LI Qi2, CUI Ting3. JIn Boquan2 & CHEn Chao1,3.1. Biochip Research and Development Center, northwest university (national Engineering Research Center for Miniaturized Detection System), xi’an 710069, china 2. {3. of Immunology, The Fourth Military Medical university, xi’an 71003., china 3. Shaanxi Lifegen Co., Ltd., xi’an 710069, china 1. Biochip Research and Development Center Northwest University (National Engineering Research Center for Miniaturized Detection System) Xi’an 710069 China 3. Shaanxi Lifegen Co. Ltd. Xi’an 710069 China 2. department of Immunology The Fourth Military Medical University Xi’an 710032 China

Micrometer-sized Fe3.4 particles and nano-sized gold particles were first synthesized by methods of self-aggregation of surface-chemically modified Fe3.4 nanoparticles and citrate reduction of the Au3. to Au0, respectively. Interaction between these two types of particles resulted in the assembly of nano-sized gold particles on the surface of the micrometer-sized Fe3.4 particles, forming an assembled structure with the Fe3.4 core particles around which are attached nano-sized gold parti- cles. The Fe3.4/Au structure is named GoldMag particles with assembled structure. The synthetic process, structure, and magnetic property of the GoldMag particles were analyzed. GoldMag particles with assembled structure have an irregular shape, rough surface with a diameter of 2―3.μm. These particles exhibit the superparamagnetic property with saturated magnetization of 41 A·m2/kg. In a single step, antibodies could be readily immobilized onto the surface of the particles with a high binding capacity. The GoldMag particles can be used as a novel carrier in immunoassays. The maximum quantity of human IgG immobilized onto GoldMag particles was 3.0 μg/mg. In order to validate the quality of the GoldMag particles as immunoassay carriers, an immunoassay system was used. The relative amount of immobilized human IgG was measured by HRP-labeled anti human IgG. The coefficient of variation within parallel samples of each group was below 6% and the coefficient of variation of means between five groups carried out separately was below 7%. Based on the sandwich method, the Hepatitis B surface antigen (HBsAg) and interleukin-8 (IL-8) were also analyzed by qualitative and quantitative detection, respectively. The result indicated that the GoldMag particles with assembled structure were an ideal carrier in immunoassay.

关键词： GoldMag particles with assembled structure, synthesis, carrier, immunoassay.

CEnOZOIC SEDIMEnTARY SEQUEnCE In THE KUMUKULI BASIn, xinJIAnG AnD nEW EVIDEnCE On LATE QUATERnARY UPLIFT OF THE QInGHAI—TIBETAn PLATEAU

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地学前缘 2000年第S1期7卷 213-215页

作者： Zhang Yunxiang, Che Zicheng, Liu Liang (department of geology, northwest university, xi’an {3.,china)

The elevation of Qinghai\|Tibetan plateau is a epoch\|making event in the global evolutionary history, which not only constructed the modern magnificent geomorphic feature, but also influenced far\|reachingly the global climate. The evolutionary models of its uplifting time and scope has been primarily set up, and is waiting to be competed with new discovery and supplement. A comprehensive field geologic excursion on the Cenozoic strata of the Kumukuli basin, xinjiang, northwest Qinghai\|Tibetan plateau by authors has collected a lot of first\|hand data, and the discovery and dating of the late Pleistocene mammal fossils made an important supplement to the scarcity of late Quaternary fossil recorders in many basins, as well as contributed a great deal to the quantitative study of the researches alike, in the main time, provided new evidences to the uplift of Qinghai\|Tibetan plateau since late *** in the northwest part of the Qinghai\|Tibetan plateau, and between the Kunlun and Altum Mountain ranges, Kumukuli basin is a intracontinental plateau basin, with a mean elevation about 4000m. Cenozoic strata have a time span from Oligocene to *** stratigraphic and lithologic association displays that the development of Kumukuli basin started at the Oligocene, at the primary uplift stage of the Qinghai\|Tibetan plateau. The Oligocene and Miocene, with a giant thickness and multiple layers of thick conglomerate, is of the products of stronger erosional stage, and a reflection of higher differential in inner geomorphology of the plateau. The aggradation led to the smoothness of the geomorphic feature and fineness of sedimentary particle since Pliocene. Since then, Large scale conglomerate outcroped in the peripheral of the plateau, and differential of geomorphology in the plateau and its peripheral areas became distinct. Kumukuli basin is one of the synchronously developed basin with the plateau, having the most completed Cenozoic sequence with a thic

关键词： Qinghai\|Tibetan plateau Cenozoic sedimentary sequ ence mammal fossils

Cenozoic volcanic rocks in the Belog Co area, Qiangtang, northern Tibet, china: Petrochemical evidence for partial melting of the mantle-crust transition zone

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Acta Geochimica 2007年第3期26卷 305-311页

作者： LAI Shaocong, QIn Jiangfeng, LI Yongfeng, and LIU xin State Key Laboratory of Continental Dynamics, department of geology, northwest university, xi’an {3., china State Key Laboratory of Continental Dynamics Department of GeologyNorthwestUniversityXi'an 710069China

neogene volcanic rocks in the Belog Co area, Qiangtang, northern Tibet, are represented by a typical intermediate-basic and intermediate alkaline rock association, with latite-trachyte as the main rock type. The results of chemical analysis are: SiO2=52%–62%, Al2O3.15%, na2O/K2O>1 and MgO3.3.%. In addition, the volcanic rocks are LREE-enriched with LREE/HREE=10–13. (La/Yb)n=15–19, and show a weak negative Eu anomaly with δEu=0.71–0.89. The close relationship between Mg# and SiO2 and the co-variation of the magmatophile elements and ultra-magmatophile elements such as La/Sm-La and Cr-Tb indicate that this association of volcanic rocks is the product of comagmatic fractional crystallization. The rock association type and lower Sm/Yb values (Sm/Yb=3.23.3.97) imply that this association of volcanic rocks should have originated from partial melting of spinel lherzolite in the lithospheric mantle. On the other hand, the weak negative Eu anomaly and relative depletion in nb, Ta and Ti reflect the features of terrigenous magma. So the neogene Belog Co alkaline volcanic rocks should be the result of partial melting of the special crust-mantle transition zone on the Qinghai-Tibet Plateau.

关键词： major and trace elements Cenozoic volcanic rock mantle-crust transition zone Qinghai-Tibet Plateau

Petrogenesis of Songshugou dunite body in the Qinling orogenic belt, Central china: Constraints from geochemistry and melt inclusions

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Science china Earth Sciences 2005年第8期48卷 1146-1157页

作者： SU Li1,2, SOnG Shuguang3.& ZHOU Dingwu1 1. Key Laboratory of Continental Dynamics of the Ministry of Education, department of geology, northwestern {3., xi’an 710069, china 2. The Geological Lab Center, china {3. of Geosciences (Beijing), Beijing 100083. china 3. Key Laboratory of Orogenic Belts of the Ministry of Education, department of geology, Peking {3., Beijing 100871, china 1. Key Laboratory of Continental Dynamics of the Ministry of Education Department of Geology Northwestern University 710069 Xi’an China 2. The Geological Lab Center China University of Geosciences 100083 (Beijing)Beijing China 3. Key Laboratory of Orogenic Belts of the Ministry of Education Department of Geology Peking University 100871 Beijing China

The Songshugou dunite body, which occupies an area of about 20 km2, is the largest ultramafic massif in the eastern Qinling orogenic belt, Central china. The major compo-nent of this body is dunitic rocks including mylonitic dunite and coarse-grained dunite; they oc-cupy about 95 vol% of the total body. Petrography, mineral composition, major and trace ele-ments and primitive melt inclusions have been investigated in this paper; all revealed that this dunite body is the product of melt-rock interaction by porous percolation flow. In comparison with dunite sills or veins in harzburgite from the basal part of Oman ophiolite, this dunite body is characterized by lower contents of Al2O3. CaO and HREE but higher content of highly incom-patible elements and Zr and Hf. The LREE enriched patterns and primitive mantle normalized spidergrams of trace elements are also different from the Oman dunite. Combining with melt in-clusions observed in olivines, we conclude that this dunite body is the product of large- scale porous percolation flow of high-MgO melts within depleted mantle peridotites. The high-MgO magma, in essence, was most probably produced at the hot head of an upwelling mantle plume. The occurrence of the Songshugou dunite body is closely associated with the activity of mantle super-plume in neo-Proterozoic era in the Yangtze Craton.

关键词： Songshugou dunite body, geochemistry, melt inclusion, mantle plume, Qinling orogenic belt.

微量铂的2-(3.5-二氯-2-吡啶偶氮)-5-二甲氨基苯胺激光热透镜光谱法测定

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分析测试学报 2003年第1期22卷 34-37页

作者：张小玲闫宏涛西北大学化学系陕西西安710069

基于2_(3.5_二氯_2_吡啶偶氮)_5_二甲氨基苯胺(3.5_diCl_PADMA)与铂的显色反应 ,以激光热透镜光谱法测定了微量铂 ;实验表明 ,在强酸性介质中 ,Pt(Ⅳ)与3.5_diCl_PADMA显色形成稳定的蓝色络合物 ,络合物最大吸收波长位于63.nm处 ,与所... 详细信息

基于2_(3.5_二氯_2_吡啶偶氮)_5_二甲氨基苯胺(3.5_diCl_PADMA)与铂的显色反应 ,以激光热透镜光谱法测定了微量铂 ;实验表明 ,在强酸性介质中 ,Pt(Ⅳ)与3.5_diCl_PADMA显色形成稳定的蓝色络合物 ,络合物最大吸收波长位于63.nm处 ,与所用激光器输出激光波长λ63.nm 匹配较好 ,从而建立了激光热透镜光谱法测定铂的方法 ;铂质量浓度分别在0.005～0.04mg/L和0.025～0.4mg/L范围内与激光热透镜信号强度呈线性关系 ,方法灵敏度高 ,选择性、重现性好 ,用于样品测定。

关键词：测定激光热透镜光谱法铂 2-(3.5-二氯-2-吡啶偶氮)-5-二甲氨基苯胺微量分析