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Investigation on Molecular and Crystal Structures of Metal Complexes with Aminopolycarboxylic Acids(Ⅰ)─Synthesis and Structure of Na_2[Fe~Ⅲ(ida)2]2·3H_2O

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Chinese Chemical letters 1997年第8期8卷 741-744页

作者： Jun WANG Wei Qun ZHANG Xi Ming SONG Xiang Dong ZHANG (department of Chemistry, liaoning university,Shenyang 110036)Yan XING Yong Hua lIN Heng Qing JIA lei ZHANG(Changchun Institute of Applied Chemistry, Chinese Academy of sciences, Changchun 130024) department of Chemistry Liaoning University Shenyang 110036 China Changchun Inst. of Applied Chemistry Chinese Academy of Sciences Changchun 130024 China

The crystal structure of the title complex salt has been determined by single-crystal X-ray structure analysis. The crystal data are as follows; Monoclinic, P21/c, a=15.6480(10)A,b=16.7870(10)A, c=10.347(2)A, β=90.790(10), V=2717.7(6)A3, Z=3, and R=0.0333 for 4789 unique reflections. The complex anion has a pseudo-octahedral structure distorted more than the CrⅢand CoⅢ analogs, in which cach iminodiacetato ligand (ida2-) is coordinated in a facial fashion with the two N atoms in a cis configuration, resulting in an unsyin-fac structure.

关键词： Na Synthesis and Structure of Na2[Fe Investigation on Molecular and Crystal Structures of Metal Complexes with Aminopolycarboxylic Acids ida)2]2

Surface Tension Calculation of Undercooled Alloys

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Rare Metals 2001年第1期20卷 58-61页

作者： Zhiyu Qiao, lijun Yan, Zhanmin Cao, Guirong liu (department of Physical Chemistry, university of Science and Technology Beijing, Beijing 100083, China) Univ Sci & Technol Beijing Dept Phys Chem Beijing 100083 Peoples R China

Based on the Butler equation and extrapolated thermodynamic data of undercooled alloys from those of liquid stable alloys, a method for surface tension calculation of undercooled alloys is proposed. The surface tensions of liquid stable and undercooled Ni-Cu (x(Ni)=0.42) and Ni-Fe (x(Ni)=0.3 and 0.7) alloys are calculated using STCBE (Surface Tension Calculation based on Butler Equation) program. The agreement between calculated values and experimental data is good enough, and the temperature dependence of the surface tension can be reasonable down to 150-200 K under the liquid temperature of the alloys.

关键词： undercooled alloy surface tension Butler equation

Ribosomal Protein Genes S23 and l35 from Amphioxus Branchiostoma belcheri tsingtauense:Identification and Copy Number

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Acta Biochimica et Biophysica Sinica 2005年第8期37卷 573-579页

作者： Xian lI Shi-Cui ZHANG~* Zhen-Hui lIU Hong-Yan lI department of Marine Biology,Ocean university of China,Qingdao 266003,China department of Marine Biology Ocean University of China Qingdao 266003 China

The complete cDNA and deduced amino acid sequences of the ribosomal proteins S23(AmphiS23)and l35(Amphil35)from amphioxus Branchiostoma belcheri tsingtauense were identified inthis ***23 cDNA is 546 bp long and encodes a protein of 143 amino *** has a predictedmolecular mass of 15,851 Da and a pI of ***35 cDNA comprises 473 bp,and codes for a proteinof 123 amino acids with a predicted molecular mass of 14,543 Da and a pI of ***23 shares morethan 83% identity with its homologues in the vertebrates and more than 84% identity with those in ***35 is more than 63% identical to its counterparts in the vertebrates and more than52% identical to those in the *** blot analysis demonstrated the existence of 1-2 copiesof the S23 gene and 2-3 copies of the l35 gene in the genome of amphioxus *** *** in sharp contrast to the presence of 6-13 copies of the S23 gene and 15-17 copies of the l35 gene in therat *** is clear that the housekeeping genes like S23 and l35 underwent a large-scale duplication inthe vertebrate lineage,reinforcing the gene/genome duplication hypothesis.

关键词： amphioxus ribosomal protein S23 l35 copy number

PROPERTIES OF NATURAl CAVITATION FlOWS AROUND A 2-D WEDGE IN SHAllOW WATER

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Journal of Hydrodynamics 2011年第6期23卷 730-736页

作者： CHEN Xin lU Chuan-jing lI Jie CHEN Ying department of Engineering Mechanics Shanghai Jiao Tong University Shanghai 200240 China department of Engineering Mechanics and State Key laboratory of Ocean Engineering Shanghai Jiao Tong University Shanghai 200240 China

When a body navigates with cavity in shallow water, both flexible free surface and rigid bottom wall will produce great influences on the cavity shape and hydrodynamic performances, and further affect the motion attitude and stability of the body. In the present work, characteristics of the natural cavitating flow around a 2-D symmetrical wedge in shallow water were investigated and the influences of two type boundaries on the flow pattern were analyzed. The Volume Of Fluid （VOF） multiphase flow method which is suitable for free surface problems was utilized, coupled with a natural cavitation model to deal with the mass-transfer process between liquid and vapor phases. Within the range of the cavitation number for computation （0.07-1.81）, the cavity configurations would be divided into three types, viz., stable type, transition type and wake-vortex type. In this article, the shapes of the free surface and the cavity surface, and the hydrodynamic performance of the wedge were discussed under the conditions of relatively small cavitation number （〈0.256）. The present numerical cavity lengths generally accord with experimental data. When the cavitation number was decreased, the cavity was found to become longer and thicker, and the scope of the deformation of the free surface also gradually extends. The free surface and the upper cavity surface correspond fairly to their shapes. However, the lower side of the cavity surface was rather leveled due to the influence of wall boundary. The lift and drag coefficients of this 2-D wedge basically keep linear relations with the natural cavitation number smaller than 0.157, whereas direct proportion for drag and inverse proportion for lift.

关键词： shallow water natural cavitation boundary effect multiphase flow

Palinspastic Reconstruction for Tectonics of Northeast China and Its Vicinity

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Journal of Earth Science 1998年第3期17卷 20-30页

作者： liu Xianwen Meng Xiangang Institute of Geomechanics, Chinese Academy of Geological sciences, Beijing 100081 Tamaki Kensaku Ocean Research Institute, university of Tokyo, Tokyo, Japan Shen Ninghua Ge Xiaohong department of Earth sciences, Cha

Collision and amalgamation of continent and microcontinent block were recognized as one of the major processes for building up a continent. The pre Jurassic structure of Northeast China and its adjacent region (including south of Russia Far East, north of North Korea and inner part of southwest Japan) is characterized by collision and amalgamation of microcontinent blocks, such as the North China block (NCB), Northeast China block (NECB), Khanka block and Hida *** central Jilin belt and Yanbian Grodekovsk belt that juxtapose and amalgamate these blocks in between in Northeast China and its vicinity were formed by a series of rock assemblages that are typical for Paleozoic active continental margin island arcs. The dominant Permian marine sequences in Yanbian (Yanbian Grodekovsk) belt, which are known for bearing transitional marine fauna, include turbidite olistostrome sediments of a slope facies, and limestones, sandstones as well as siltstones of a neritic littoral facies sediments along with predominant acidic to intermediate volcanic materials. The Maizuru belt in southwest Japan is supposed to be the equivalent of Yanbian Grodekovsk belt. The central Jilin belt consists of a well developed sedimentary sequence and volcanics of Paleozoic. The Bamiantong Gudonghe Fuerhe Chongjin suture complex in Northeast China and the equivalent Sangun Akiyoshi belt in southwest Japan serve as a major suture zone among these microcontinental blocks and belts.

关键词： orogenic belt suture zone melange complex tectonic reconstruction Northeast China.

Synthesis of 6-aryl substituted 3-(5'-phenyl-2H-tetrazole-2'-methylene)-S-triazolo[3,4-b]-1,3,4-thiadiazoles

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Chinese Journal of Chemistry 1995年第5期13卷 448-453页

作者： ZHANG, Zi-Yi ZOU, NingNational laboratory of Applied Organic Chemistry, department of Chemistry, lanzhou university, lanzhou, Gansu 730000, China National laboratory of Applied Organic Chemistry Department of Chemistry Lanzhou University Lanzhou Gansu 730000 China

In this paper , 10 novel 6-aryl-3-(5'-phenyl-2H-tetrazole-2'-methylene)-S-triazolo[3, 4-b]-1,3,4-thiadiazoles have been synthesized by the condensation of 3-(5'-phenyl-2H-tetrazole-2'-methylene)-4-amino-5-mercapto-1,2,4-triazole with various aromatic carboxylic acids in the presence of phosphorus oxychloride. The structure of these compounds was determined by elemental analysis , UV, IR, 1H NMR and MS. Their spectral properties were also discussed.

关键词： S-triazolo[3,4-b]-1,3,4-thiadiazole synthesis spectral analysis

On generalized k-syzygy modules

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Science China Mathematics 2007年第5期50卷 675-682页

作者： Chong-hui HUANG & Zhao-yong HUANG department of Mathematics, Nanjing university, Nanjing 210093, China College of Mathematics and Physics, Nanhua university, Hengyang 421001, China department of Mathematics Nanjing University Nanjing China College of Mathematics and Physics Nanhua University Hengyang China

In this paper, we first introduce the notion of generalized k-syzygy modules, and then give an equivalent characterization that the class of generalized k-syzygy modules coincides with that ofω-k-torsionfree modules. We further study the extension closure of the category consisting of generalized k-syzygy modules. Some known results are obtained as corollaries.

关键词： generalized k-syzygy module ω-k-torsionfree module extension closure

Bounds for Two Classes of Graph Spectrum and Proof of Their Conjectures

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应用数学 1991年第3期 119-120页

作者： Chen Jiansheng (Math. department of Hu(?)zhong university of Science & Technology)

let λbe the kth greatest eigenvalue of forest F (or tree T) on n vertices, then λ=-λ. Hong Yuan proposed the following conjecture: Conjecture 1. Suppose T is a tree with n vertices and edge independence number q. For k≤q, λ(T)≥λ(Swith equality iff T≌S, where Sis formed from a Kand a path Pby joining with an edge a vertex of degree one of Pto the vertex of degree n-2k+1 of K.

关键词： tree Bounds for Two Classes of Graph Spectrum and Proof of Their Conjectures Graph

The Relationship between Microtexture Types and Indices of Physico-Mechanical Properties of loess in China

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Acta Geologica Sinica(English Edition) 1989年第4期63卷 433-443,453页

作者： lei Xiangyi department of Geology, Northwest university, Xi’an, Shaanxi

The paper deals mainly with the relationship between the microtexture types and the indices of physicomechanical properties of loess. The results of study demonstrate that the study of microtextures of loess is of imp... 详细信息

关键词： Pro The Relationship between Microtexture Types and Indices of Physico-Mechanical Properties of loess in China