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Synthesis,crystal structure and thermal behavior of Rb(NTO)·H_2O

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chinese Science Bulletin 2001年第1期46卷 45-49页

作者： HU Mancheng, GAO Shiyang, LIU Zhihong, SONG Jirong, XIA Shuping & YU Kaibei1. institute of Applied Chemistry, Shaanxi Normal University, Xi’an 710062, china 2. Department of Chemical Engineering, Northwest University, Xi’an 710069, china 3. chengdu Branch of chinese academy of Sciences, chengdu 610041, china institute of Applied Chemistry Shaanxi Normal University Xi’an China Department of Chemical Engineering Northwest University Xi’an China chengdu Branch of chinese academy of Sciences Chengdu China

The Rb(NTO) .H2O crystal has been synthesized by reaction of 3-nitro-l,2,4-triazole-5-one (NTO) with Rb2CO3 in aqueous solution. Its crystal structure has been determined. The crystal belongs to monoclinic system. Crystal structure data: space group P21/ n; a = 0.633 0(1), b = 0.824 1(2), c =1.296 4(3) nm; β = 97.90(1)°; V = 0.669 9 (2) nm3, Z = 4, Dc= 2.306 g/cm3,μ = 7.365 nm-1, F(000) = 448. An eight coordinated compound is formed between Rb+ with oxygen atoms and nitrogen atoms. A layer structure is formed by coordination bonds and hydrogen bonds. The thermal decomposition mechanism of this coordination compound is discussed.

关键词： Rb-NTO coordination compound crystal structrue thermal decomposition.

Expression of Monomeric Insulin Precursor in Pichia pastoris and Its Conversion into Monomeric B27 Lys Destripeptide Insulin by Tryptic Hydrolysis

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Acta Biochimica et Biophysica Sinica 2005年第4期37卷 234-240页

作者： Jin-Guo DING~(1,3) Jian FEI~2 Da-Fu CUI~1 You-Shang ZHANG~1 ~1institute of Biochemistry and Cell biology,and ~2Model Organism Research Center,Shanghai institutes for Biologicol Sciences, chinese academy of Sciences,Shanghai 200031,china ~3Graduate School of the chinese academy of Sciences,Shanghai 200031,china institute of Biochemistry and Cell biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China Graduate School of the chinese academy of Sciences Shanghai 200031 China Model Organism Research Center Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China

Monomeric B27 Lys destripeptide insulin (B27 Lys DTrI) was designed and produced from itsprecursor expressed in Pichia pastoris through tryptic hydrolysis instead of the less efficient *** monomeric B27 Lys DTrI precursor (MIP) was purified from a cultured medium *** by a combination of hydrophobic,size-exclusion,and ion-exchange *** purifiedMIP was converted,by tryptic hydrolysis,to B27 Lys DTrI,which was then purified by ion-exchangechromatography to homogeneity as assessed by native gel electrophoresis,HPLC,amino acid composition,and electrospray mass-spectrometric analysis.B27 Lys DTrI exhibited superior monomeric properties insize-exclusion *** yield of MIP was 200 mg per liter of culture,and the overall yield ofpurified B27 Lys DTrI from the crude MIP was 70%.The in vivo biological activity of B27 Lys DTrI asdetermined by the mouse convulsion assay was 21 U/mg,identical to that obtained by semisynthesis.

关键词： monomeric B27 Lys destripeptide insulin tryptic hydrolysis Pichia pastoris

Palynological characters of Glycyrrhiza,Glycyrrhizopsis,and Meristotropis(Leguminosae),with special reference to their taxonomic significance

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Journal of Systematics and Evolution 2010年第6期48卷 455-463页

作者： 1,2Lei MENG 2Xiang-Yun ZHU 1(College of Biological Sciences,china Agricultural University,Beijing 100094,china) 2(institute of Botany,chinese academy of Sciences,Beijing 100093,china) (College of Biological Sciences China Agricultural University Beijing 100094 China) (institute of Botany Chinese Academy of Sciences Beijing 100093 China)

The pollen morphology of 11 species of the genus Glycyrrhiza *** one from each of the genera Glycyrrhizopsis Boiss.& *** Meristotropis Fisch.& *** investigated by scanning electron *** pollen morphology,the main differences between Glycyrrhizopsis and Glycyrrhiza are:Glycyrrhizopsis-pollen grains 36.63 × 40.42 μm in size,oblate spheroidal in shape;and Glycyrrhiza-pollen grains 24.47-33.18 × 23.82-31.83 μm in size,prolate spheroidal in *** and Glycyrrhiza should be recognized as two distinct genera based on palynological and morphological *** and Glycyrrhiza are similar in many important palynological and morphological characters,suggesting that the two should be *** Glycyrrhiza,two types of pollen grains,3-lobed-circular or subtriangular in polar view,are found in different species,in accordance with morphological differences in the two groups,shedding light on the classification and evolution of the genus.

关键词： exine sculpture morphological character pollen morphology taxonomic revision.

The lepton flavor violating signal of the extra gauge boson Z′in photon-photon collision at the ILC

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Science china(Physics,Mechanics & Astronomy) 2010年第11期53卷 1992-1997页

作者： LIU GuoLi 1,2 1 Physics Department,Zhengzhou University,Zhengzhou 450001,china 2 Kavli institute for Theoretical Physics china,chinese academy of Sciences,Beijing 100190,china Physics Department Zhengzhou University Zhengzhou China Kavli institute for Theoretical Physics china Chinese Academy of Sciences Beijing China

The hitherto unconstrained lepton flavor mixings,induced by the new gauge boson Z ,which are the prediction of many new physics models,such as topcolor-assisted technicolor (TC2) models and flavor-universal TC2 models,may lead to the lepton flavor violating productions of τμˉ,τeˉ and μeˉ in photon-photon collision at the proposed International Linear Collider (ILC).Through a comparative analysis of these processes,we find that the better channel to probe the new physics models is the production of τμˉ or τeˉ which occurs at a much higher rate than μeˉ production due to the large mixing angle and the large flavor changing coupling,and may reach the detectable level of the ILC for a large part of the parameter *** the rates predicted by the Standard Model are far below the detectable level,these processes may serve as a sensitive probe for such new physics models.

关键词： new gauge boson Z lepton flavor violating processes photon-photon

Crystal structure and thermal decomposition mechanism of the supramolecular complex of barium chloride with inositol

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Science china Chemistry 2005年第Z1期48卷 50-54页

作者： WANG Feili,TANG Zongxun,LI Shuni,HU Daodao,ZHAO Hongan,HU Huaimin & ZHOU Zhongyuan Department of Chemistry,Northwest University / Shaanxi Key Laboratory of Physico-lnorganic Chemistry,Xi’an 710069,china Shaanxi Normal University,Xi’an 710062,china chengdu institute of Organic Chemistry,chinese academy of Sciences,chengdu 610041,china Department of Chemistry Northwest University / Shaanxi Key Laboratory of Physico-lnorganic Chemistry Xi’an China Shaanxi Normal University Xi’an China chengdu institute of Organic Chemistry Chinese Academy of Sciences Chengdu China

The single crystal of [Ba(H2O)2(C6H12O6)2Cl2] was obtained based on the phase equilibrium results. Its structure was determined by X-ray crystallographic analysis. The crystals are monoclinic and in space group C2/c with a = 1.901 7(2) nm, b = 0.682 13(8) nm, c = 0.162 60(2) nm, β = 96.593(2)° and V = 2.095 3(4) nm3, Z = 4, DC = 1.917 g·cm-3. In its solid state, this supramolecular complex is a three-dimensional network with double layers connected by hydrogen bondings. The molecule structure of [Ba(H2O)2(C6H12O6)2Cl2] has a central barium ion that is coordinated to two water molecules, two chlorides, and four hydroxyls from the two inositols. Losing the coordinating water is controlled by random nucleation and growth mechanism (n = 2/3) and 3-dimensional diffusion mechanism (n = 2).

关键词： barium complex, inositol, crystal structure, water loss mechanism.

Tissue Distribution and Purification of Prophenoloxidase in Larvae of Asian Corn Borer, Ostrinia furnacalis Guenée (Lepidoptera: Pyralidae)

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Acta Biochimica et Biophysica Sinica 2004年第5期36卷 360-364页

作者： Cong-Jing FENG1,2 and Wen-Jun FU1* 1institute of Plant Physiology and Ecology, Shanghai institute for Biological Sciences, the chinese academy of Sciences, Shanghai 200025, china 2The GraduateSchool of the chinese academy of Sciences, Beijing 100039, china institute of Plant Physiology and Ecology Shanghai Institute for Biological Sciences the Chinese Academy of Sciences Shanghai 200025 China The Graduate School of the chinese academy of Sciences Beijing 100039 China

Using ammonium sulphate precipitation, Blue-Sepharose CL-6B, Phenyl-Sepharose CL-4B, prophenoloxidase (PPO) was isolated and purified from hemolymph of Ostrinia furnacalis larvae. This zy- mogen was a heterodimer, and composed of two subunits with the relative molecular mass ranging from 66.2 kD to 97.4 kD determined by SDS-PAGE. Western blotting and indirect immunofluorescence test showed that PPO was present in integument, hemolymph plasma and cell membrane of granular hemocytes and oenocytoids of O. furnacalis larvae.

关键词： Ostrinia furnacalis prophenoloxidase tissue distribution purification

Characterization of WAP2 gene in Aegilops tauschii and comparison with homoeologous loci in wheat

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Journal of Systematics and Evolution 2009年第6期47卷 543-551页

作者： ~(1,2)Shun-Zong NING ~(1,2)Qi-Jiao CHEN ~(1,2)Zhong-Wei YUAN ~(1,2)Lian-Quan ZHANG ~(1,2)Ze-Hong YAN ~(1,2)You-Liang ZHENG ~(1,2,3)Deng-Cai LIU~* 1(Triticeae Research institute,Sichuan Agricultural University,Wenjiang of chengdu City,Sichuan 611130,china) 2(Key Laboratory of Crop Genetic Resources and Improvement,Ministry of Education,Sichuan Agricultural University,Ya’an,Sichuan 625014,china) 3(Northwest Plateau institute of biology.chinese academy of Science,Qinghai 810001,china) (Triticeae Research institute Sichuan Agricultural University Wenjiang of Chengdu City Sichuan 611130 China) (Key Laboratory of Crop Genetic Resources and Improvement Ministry of Education Sichuan Agricultural University Ya'an Sichuan 625014 China) (Northwest Plateau institute of biology Chinese Academy of Science Qinghai 810001 China)

The Q/q gene,also known as WAP2,is an important gene for wheat domestication and is a member of the AP2(APETALA2) class of transcription *** the present study,we first isolated the W~tAP2 allele(where the superscript"t"refers to the speciese source,in this case"tauschii") on chromosome 5D from Aegilops tauschii Coss.,the D-genome donor species of common *** found that W~tAP2 and the AP2 gene from Arabidopsis share a central core of the AP2 polypeptide,a highly basic 10-amino acid domain,and an AASSGF box,although there are many differences in the 37-amino acid serine-rich acidic domain and the remaining *** addition, W~tAP2 was highly homologous to the homoeologous loci on 5A and 5B of wheat at both the nucleotide and amino acid ***,there were some variations that are probably related to gene *** the first AP2 domain, the amino acids VYL on the 5D and 5A loci were replaced with LLR on *** the 37-amino acid serine-rich acidic domain,W~tAP2 on 5D had an extra amino acid *** was also a variation at the 329 amino acid position, which is thought to be related to the appearance of free-threshing *** this position,the amino acid is isoleucine on 5A for the Q allele and valine for the q allele,whereas the amino acid is leucine on 5D and ***, a Stowaway miniature terminal inverted repeat element(MITE) insertion was present in the ninth intron of WAP2 on 5B of all common wheats and partial tetraploid Triticum turgidum *** results provide new clues for studies into the evolutionary biology of WAP2 and the origin of common wheat.

关键词： Aegilops tauschii AP2 gene miniature terminal inverted repeat element(MITE) Q gene wheat

Mass Spectrometric Evidence of Heparin Disaccharides for the Catalytic Characterization of A Novel Endolytic Heparinase

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Acta Biochimica et Biophysica Sinica 2004年第12期36卷 840-844页

作者： Yapeng CHAO1,3, Shaoxiang XIONG2, Xiulan CHENG1, and Shijun QIAN1* 1institute of Microbiology, chinese academy of Sciences, Beijing 100080, china 2Center of Mass Spectrometry, institute of Chemistry, chinese academy of Sciences, Beijing 100080, china 3Graduate School of the chinese academy of Sciences, Beijing 100039, china institute of Microbiology Chinese Academy of SciencesBeijing 100080 China Graduate School of the chinese academy of SciencesBeijing 100039 China Center of Mass Spectrometry Institute of Chemistry Chinese Academy of SciencesBeijing 100080 China

Heparinase from different sources can eliminate heparin or/and heparan sulfate into various low-molecular weight heparins with different characteristics. Porcine intestinal mucosa heparin was de- graded into a series of oligosaccharides by a novel heparinase from the species Sphingobacterium. Disaccha- ride components from the digests were separated and purified by ultrafiltration and HPLC. Five major peaks appeared as three types according to their retention time. The mass spectrometry of peak I mainly gave the non-sulfated disaccharide with the mass of 379 Da. Peak II and III were indicated as two major monosulfated disaccharides with molecular mass of 417 and 459 Da respectively. Moreover, the peak III represented an N- acetyl disaccharide. Both peak IV and V showed the same mass of 496 Da, hinting that they were disulfate- substituted disaccharides. No trisulfate-substituted disaccharides were detected in the mixture of the heparin digest though they were abundant in the heparin structure. The results revealed that the heparinase might specifically cut the sites with low sulfated domain in heparin.

关键词： electrospray ionization-mass spectrometry heparin disaccharides heparinase high perfor- mance liquid chromatography Sphingobacterium sp.

The solid lubricating material experiment device for Shenzhou-7 Spaceship

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Science china(Technological Sciences) 2010年第9期53卷 2521-2527页

作者： WANG Ke1,2,REN WeiJia1,WANG ShiDa1 & WENG LiJun3 1 academy of Opto-Electronics,chinese academy of Sciences,Beijing 100190,china 2 Graduate University of chinese academy of Sciences,Beijing 100049,china 3 Lanzhou institute of Chemical Physics,chinese academy of Sciences,Lanzhou 730000,china academy of Opto-Electronics Chinese Academy of Sciences Beijing China Graduate University of chinese academy of Sciences Beijing China Lanzhou institute of Chemical Physics Chinese Academy of Sciences Lanzhou China

A solid lubricating material exposure experiment in space is one of the missions during the seventh manned spaceflight of china,and the key is to develop a device which can be fixed reliably outside of the orbital module and can be fetched conveniently by an astronaut during space *** solid lubricating material experiment device needs to be locked reliably in a vibrating and impacting environment during the launch phase,and should meet the requirement that it can be unlocked and fetched reliably by the astronaut wearing an extravehicular spacesuit via simple operations in orbit in an environment of high and low *** for the device we developed,the environmental characteristic of the mission was analyzed,the mechanical analysis and thermal analysis were carried out,and then a mechanism with functions of mechanical locking,structural self-locking and manual unlocking was *** device was verified by a sequence of experiments and was fetched by the astronaut during the flight of the Shenzhou-7 Spaceship.

关键词： manned spaceflight exposure experiment mechanism unlock