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Synthesis of superheavy nuclei with ^(2.8)U target

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Science china(Physics,Mechanics & Astronomy) 2009年第10期52卷 1482-1488页

作者： LIU ZuHua1,3 & BAO JingDong2.4 1 key laboratory of Beam Technology and Material Modification of Ministry of Education,Beijing Normal {2.,Beijing 100875.china 2.Department of Physics,Beijing Normal {2.,Beijing 100875.china 3 {2. Institute of atomic Energy,Beijing 102.13,china 4 Center of Theoretical Nuclear Physics,National laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,china key laboratory of Beam Technology and Material Modification of Ministry of Education Beijing Normal University Beijing 100875 China Department of Physics Beijing Normal University Beijing 100875 China china Institute of atomic Energy Beijing 102413 China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou 730000 China

The production of superheavy nuclei with Z=108-116 via hot fusion reactions of the neutron-rich projectiles with 2.8U target is systematically *** results show that the production cross sections of superheavy nuclei do not decrease monotonously as the atomic number Z *** cross sections of the superheavy nuclei at Z = 112.and 115.are enhanced as compared with the whole Z-trend in synthesis of the superheavy nuclei,which clearly illustrates that the reactions with large negative Q-value and shell correction are more favorable to synthesize superheavy nuclei.

关键词： superheavy nuclei fusion reaction cross section 2.8U target

Expression profiles and transactivation analysis of a novel ethylene-responsive transcription factor gene GhERF5.from cotton

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Progress in Natural Science:Materials International 2009年第5期19卷 563-572页

作者： Longguo Jin, Bo Huang, Hui Li, Jinyuan Liu laboratory of molecular Biology and MOE laboratory of Protein Science, Department of Biological Sciences and Biotechnology, tsinghua university, Beijing 100084, china [a]laboratory of molecular Biology and MOE laboratory of Protein Science Department of Biological Sciences and Biotechnology Tsinghua University Beijing 100084 China

Plant AP2.EREBP transcription factors play important roles in plant development and in plant responses to biotic and abiotic stresses. A novel gene for ethylene-responsive element binding protein (EREBP), designated GhERF5. which encodes a protein of 2.0} amino acids, was isolated by RACE-PCR from cotton (Gossypium hirsutum) seedlings. Sequence alignment revealed that GhERF5.contains a typical AP2.ERF domain, and belongs to the B3 subgroup of the ERF subfamily. Particle bombardment assay showed that GhERF5.functions as an in vivo transcription activator in tobacco cells, and it is located in the nuclei of onion epidermis cells. Semi-quantitative RT-PCR revealed that the expression of GhERF5.was highly and rapidly induced when plants were treated with exogenous ethylene, abscisic acid (ABA), salt, cold and drought. Promoter analysis indicated that there are conserved cis-acting elements induced by these stresses in the 5.-upstream region of the GhERF5.gene. These results suggest that the GhERF5.gene might play an important role in cotton response to ethylene, ABA and environmental stresses.

关键词： Ethylene-responsive element binding factor (ERF) Abiotic stresses Nuclear localization Transactivation Gossypium hirsutum

Synthesis and photophysical properties of Ir~Ⅲ-Ln~Ⅲ(Ln=Nd,Yb,Er) bimetallic complexes containing bipyrimidines as bridging ligands

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Science china Chemistry 2009年第11期52卷 1808-1813页

作者： CHEN FangFang,JIANG WeiLi,LOU Bin,BIAN ZuQiang & HUANG ChunHui Beijing National laboratory for molecular Sciences,State {2. laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and molecular Engineering,Peking {5.,Beijing 100871,china Beijing National laboratory for molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular Engineering Peking University Beijing China

Bipyrimidines have been chosen as(N^N)(N^N) bridging ligands for connecting metal ***Ⅲ-LnⅢ(Ln = Nd,Yb,Er) bimetallic complexes [Ir(dfppy)2.μ-bpm)Ln(TTA)3]Cl were synthesized by using Ir(dfppy)2.bpm)Cl as the ligand coordinating to lanthanide complexes Ln(TTA)3·*** stability constants between Ir(dfppy)2.bpm)Cl and lanthanide ions were measured by fluorescence *** obvious quenching of visible emission from IrⅢ complex in the IrⅢ-LnⅢ(Ln = Nd,Yb,Er) bimetallic complexes indicates that energy transfer occurred from IrⅢ center to *** emissions from NdⅢ,YbⅢ,and ErⅢ were obtained under the excitation of visible light by selective excitation of the IrⅢ-based *** was proven that Ir(dfppy)2.bpm)Cl as the ligand could effectively sensitize NIR emission from NdⅢ,YbⅢ,and ErⅢ.

关键词： bipyrimidine IrⅢ-LnⅢ bimetallic complexes stability constant NIR emission excitation of visible light

Theoretical study on S_1(~1B_(3u)) state electronic structure and absorption spectrum of pyrazine

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Science china Chemistry 2008年第12期51卷 1166-1173页

作者： HE RongXing1, ZHU ChaoYuan 2. CHIN Chih-Hao3 & LIN Sheng-Hsien2.3 1 College of Chemistry and Chemical Engineering, Southwest university, Chongqing 400715. {2. 2.Department of Applied Chemistry, Institute of {2. Science and Center for Interdisciplinary {2. Science, National Chiao-Tung university, Hsinchu 300, {2. 3 Institute of atomic and {2. Sciences, Academia Sinica, Taipei 106, {2. 1. College of Chemistry and Chemical Engineering Southwest University Chongqing 400715 China 2. Department of Applied Chemistry Institute of Molecular Science and Center for Interdisciplinary Molecular Science National Chiao-Tung University Hsinchu 300 China 3. Institute of atomic and molecular Sciences Academia Sinica Taipei 106 China

Making use of a set of quantum chemistry methods, the harmonic potential surfaces of the ground state (S0(1Ag)) and the first (S1(1B3u)) excited state of pyrazine are investigated, and the electronic structures of the two states are characterized. In the present study, the conventional quantum mechanical method, taking account of the Born-Oppenheimer adiabatic approximation, is adopted to simulate the absorp-tion spectrum of S1(1B3u) state of pyrazine. The assignment of main vibronic transitions is made for S1(1B3u) state. It is found that the spectral profile is mainly described by the Franck-Condon progression of totally symmetric mode ν6a. For the five totally symmetric modes, the present calculations show that the frequency differences between the ground and the S1(1B3u) state are small. Therefore the displaced harmonic oscillator approximation along with Franck-Condon transition is used to simulate S1(1B3u) absorption spectra. The distortion effect due to the so-called quadratic coupling is demonstrated to be unimportant for the absorption spectrum, except the coupling mode ν10a. The calculated S1(1B3u) ab-sorption spectrum is in reasonable agreement with the experimental spectra.

关键词： pyrazine absorption spectrum quantum mechanical method electronic structure

A simple lattice Boltzmann scheme for low Mach number reactive flows

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Science china(Technological Sciences) 2006年第6期49卷 714-726页

作者： CHEN Sheng1,2. LIU Zhaohui2. ZHANG Chao2. HE Zhu2. TIAN Zhiwei2. SHI Baochang 2.& ZHENG Chuguang2.1. Technology Center of Wuhan Iron and Steel (Group) Company, Wuhan 430080, china 2. State key {2. of Coal Combustion, Hua Zhong {2. of Science and Technology, Wuhan 430074, china Technology Center of Wuhan Iron Steel [Group] Company Wuhan 430080 China State key laboratory of Coal Combustion Hua Zhong University of Science Technology Wuhan 430074 China

For simulating low Mach number reactive flows, a simple and coupled lattice Boltzmann (CLB) scheme is proposed, by which the fluid density can bear significant changes. Different from the existing hybrid lattice Boltzmann (HLB) scheme and non-coupled lattice Boltzmann (NCLB) scheme, this scheme is strictly lattice Boltzmann style and the fluid density couples directly with the temperature. Because it has got rid of the constraint of traditional thought in lattice Boltzmann scheme,on the basis of the equality among the particle speed c, the time step △t and the lattice grid spacing △x held, both c and △t can be adjusted in this scheme according to a "characteristic temperature" instead of the local temperature. The whole algorithm becomes more stable and efficient besides inheriting the intrinsically outstanding strong points of conventional lattice Boltz-mann scheme. In this scheme, we also take into account different molecular weights of species, so it is more suitable for simulating actual low Mach number reactive flows than previous work. In this paper, we simulated a so-called "counter-flow" premixed propane-air flame, and the results got by our scheme are much better than that obtained by NCLB. And the more important thing is that the exploration in this work has offered a kind of brand-new train of thought for building other novel lattice Boltzmann scheme in the future.

关键词： lattice Boltzmann, low Mach number flows, reactive flows, simulation.

Evolution of cd5. gene in mammals

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Science china(Life Sciences) 2007年第6期50卷 773-779页

作者： GONG YuanYing1,2. PENG MinSheng1,2. ZHOU WeiPing1,3,4 & ZHANG YaPing1,4 1 State key laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 6{2.2.3, china 2.Graduate {2. of the Chinese Academy of Sciences, Beijing 100049, china 3 {{2. and Cell Biology, {2. of Science and Technology of china, Hefei 2.002., china 4 laboratory for Conservation and Utilization of Bio-resources, Yunnan {2., Kunming 6{2.091, china State key laboratory of Genetic Resources Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kunming 650223 China Graduate university of the Chinese Academy of Sciences Beijing 100049 China molecular Cell Biology University of Science Technology of china Hefei 230026 China laboratory for Conservation Utilization of Bio-resources Yunnan University Kunming 650091 China

The CD5.-coding sequences were obtained from 5.mammals by PCR and BLAST, and combined with the available sequences in GenBank, the nucleotide substitution rates of mammalian cd5. were calcu- lated. Results of synonymous and nonsynonymous substitution rates revealed that cd5. experienced negative selection in mammals overall. Four sites experiencing positive selection were found by using "site-specific" model in PAML software. These sites were distributed on the molecular surface, of which 2.sites located in the key functional domain. Furthermore, "branch-site-specific" model detected 1 positive site in cd5.a and cd5.b lineages which underwent accelerated evolution caused by positive selection after gene duplication in mouse.

关键词： cd5., evolution, positive selection

Effects of fish protein hydrolysate on growth performance and humoral immune response in large yellow croaker (Pseudosciaena crocea R.)

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Journal of Zhejiang university-Science B(Biomedicine & Biotechnology) 2008年第9期9卷 684-690页

作者： Hong-gang TANG1,2. Tian-xing WU1,2. Zhan-yu ZHAO1, Xiao-dong PAN1 (1Department of Chemistry, Zhejiang university, Hangzhou 31002., china) (2.2. {2. for molecular Design and Nutrition Engineering, Ningbo Institute of Technology, Zhejiang university, Ningbo 315.00, china) Department of Chemistry Zhejiang University Hangzhou 310027 China key laboratory for {2. Design and Nutrition Engineering Ningbo Institute of Technology Zhejiang University Ningbo 315100 China tangtotti@***.

We investigated the effects of fish protein hydrolysate (FPH) on growth performance and humoral immune response of the large yellow croaker (Pseudosciaena crocea R.). One thousand and two hundred large yellow croakers [initial average weight: (162.75.2..85. g] were divided into four groups and reared in floating sea cages (3 m×3 m×3 m). The animals were fed with 4 diets: basal diet only (control) or diets supplemented with 5., 10% and 15. (w/w) FPH. The results show that dietary FPH levels significantly influenced the growth and immunity of the large yellow croaker. Compared with the control group, total weight gain (TWG) in all treatment groups, relative weight gain (RWG) and specific growth rate (SGR) in fish fed with diets supplemented with 10% and 15. FPH were significantly increased (P5.. Similar results were observed in immune parameters [lysozyme activity, serum complements, immunoglobulin M (IgM)]. Lysozyme activity, complement C4 and IgM were also significantly increased (P5. in fish fed with diets supplemented with 10% and 15. FPH, while complement C3 level was significantly increased (P5. in all treatment groups. In general, with the supplementation of FPH, particularly at dose of 10%, the growth performance and immunity of the large yellow croaker can be improved effectively.

关键词： Fish protein hydrolysate (FPH) Growth performance Humoral immune response Large yellow croaker

Quantitative detection of ING1 mRNA under different gene regulation based on molecular beacon

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Chinese Science Bulletin 2006年第17期51卷 2059-2064页

作者： LIU Bin1,2.3,4, WANG Kemin1,2.3,4, XIAO Zhiqiang5.6, WANG Wei1,3,4, TAN Weihong1,2.3,4, SUN Yi5.6, TANG Hongxing1,3,4 & YANG Xiaohai1,3,41. State {2. laboratory of Chemo/Biosensing and Chemometrics, Hu- nan university, Changsha 410082. {2. 2. Life Science and Biotechnology Institute, Hunan university, Chang- sha 410082. {2. 3. Chemistry and Chemical Engineer College, Hunan university, Changsha 410082. {2. 4. Hunan Engineering Research Center for Bio-Nanotechnology, Hunan university, Changsha 410082. {2. 5. Medical Experiment Research Center, Xiangya Hospital, Central South university, Changsha 410008, {2. 6. {2. laboratory of Cancer Proteomics of Chinese Ministry of Health, Changsha 410008, {2. State key laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha China Life Science and Biotechnology Institute Hunan University Changsha China Chemistry and Chemical Engineer College Hunan University Changsha China Hunan Engineering Research Center for Bio-Nanotechnology Hunan University Changsha China Medical Experiment Research Center Xiangya Hospital Central South University Changsha China key laboratory of Cancer Proteomics of Chinese Ministry of Health Changsha China

The effects of drug treatment, gene transfection, and p5. RNA interference (RNAi) on level of ING1 mRNA in tumor cells were quantitatively detected with the help of ING1 molecular beacon (MB)/cRNA standard curve based on MB detection technology. Results showed that the level of ING1 mRNA could be upregulated by 5.FU treatment or ING1 transfection in low expression cell line of MCF-7 and be inhibited by silencing p5. with RNAi technology in normal expression cell line of CNE2. The level of ING1 varied from 7.7×10?16 to 5..4× 10?16 mol/μg total RNA of tumor cells. The results not only provided evidence for the regulation effects of gene expression but also were applied to investigat- ing the interaction of multigenes on signal transduc- tion pathway.

关键词： ING1 RT-PCR 定量分析分子信号 mRNA

Relationships between bacterial-algal proliferating and mass extinction in the Late Devonian Frasnian-Famennian transition:Enlightening from carbon isotopes and molecular fossils

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Science china Earth Sciences 2005年第10期48卷 1656-1665页

作者： GONG Yiming1,2. XU Ran1, TANG Zhongdao1, SI Yuanlan3 & LI Baohua4 1. Faculty of Earth Science and State key laboratory of Geological Processes and Mineral Resources, {2. {2. of Geosciences, Wuhan 430074, {2. 2. Institute of Resources & Environments, Henan Polytechnic {2., Jiaozuo 45.003, {2. 3. Department of Computer Science, South-Central {2. for Nationalities, Wuhan 430074, {2. 4. laboratory of Marine Geology, Tongji {2., Shanghai 2.0092. {2. Faculty of Earth Science and State key laboratory of Geological Processes and Mineral Resources {2. {2. of Geosciences Wuhan {2. Institute of Resources & Environments Henan Polytechnic university Jiaozuo china Department of Computer Science South-Central university for Nationalities Wuhan china laboratory of Marine Geology Tongji university Shanghai{2.

Studies show positive shifts of inorganic and organic carbon isotope values (δ 13Ccarb and δ 13Ckerogen) from +0.43 (‰ V-PDB) to +3.5. (‰ V-PDB) and from ?2..38 (‰ V-PDB) to ?2..14 (‰ V-PDB), respectively, B* (Ba* = Ba/ (Al2.3 X 15.)) values from 0.015.to 0.144, TOC values from 0.02. to 0.2.%, V/Cr values from 0.3 to 2.0, Sr/Ba values from 3.2. to 49.5. in the Late Devonian Frasnian Upper rhenana zone to the top linguiformis zone of the Yangdi sec-tion deposited in carbonate slope facies of Guilin, Guangxi, South china, which indicates that biomass, productivity, organic carbon burial and salinity increase and that oxygenation near the boundary between sediments and waters decreases from the Late Devonian Frasnian Upper rhenana zone to the top linguiformis zone. Abundance of molecular fossils increases and normal alkanes, isoprenoid hydrocarbon, terpanes and steranes are dominated from the Late Devonian Frasnian to the bottom of Famennian, which shows that the predecessors of molecular fossils of the Frasnian-Famennian (F-F) transition are dominated by marine phytoplankton, zooplankton and benthic bacteria with no photosynthesis. Therefore, it is considered that the F-F transitional mass extinction with a multistage, selection and global synchronizing was caused by bacte-rial-algal proliferating, continuing deterioration of the shallow marine ecoenvironment of the mid-dle-lower latitudes. A simple cause and effect chain can be expressed as: appearance of seed plants and multi-storied forests → enhanced chemical and biochemical weathering and pe-dogenesis → wide development of soils → increasing riverine nutrient fluxes in epicontinental sea → from superoligotrophic to eutrophic in epicontinental sea → proliferating of marine phyto-plankton and zooplankton → frequent red tide and anoxia → mass extinction of shallow marine organisms in the middle-lower latitudes. It is worth notice that the factor drawdown of atmos-pheric Pco2. climatic cooling and sea level falling c

关键词： mass extinction, bacteria-algae, carbon isotopes, molecular fossils, biodiversity, Late Devonian, Guangxi, South china.