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An Efficient Method for the Synthesis of Aliphatic α-Organothio Aldoximes

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Chinese Chemical Letters 1999年第2期10卷 97-98页

作者： Xin LIU Rut Lian SHAO Run Qiu HUANG(research Institute and state key laboratory of Elemento-Organic Chemistry,Nankai university. Tianjin. 300071) research Institute State Key Lab. Elemento-Organ. Chem. Nankai University Tianjin 300071 China

A new and simple procedure for the synthesis of aliphatic α-organothio aldoximes wasreported. The aliphatic aldoxime was chlorinated by t-BuOCl, the resulting hydroxime acidchloride was treated with triethylamine and alkyl mercaptan in a one pot procedure to get the targetcompounds. The method is very efficient with high yield and good purity.

关键词： Aliphatic α-organothio aldoximes α-chlorination t-butyl hypochlorite

Comparing Genetic Characteristics of Retrotransposon TOS17 During Different Tissue Culture Processes in the Rice Cultivars Nipponbare and Shishoubaimao

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Agricultural Sciences in China 2010年第2期9卷 157-162页

作者： LI Kuan, WANG Chuang, YING Shan and SHOU Hui-xia state Key laboratory of plant Physiology and Biochemistry, College of Life Sciences, Zhejiang university, Hangzhou 310058, P.R.China state Key laboratory of plant Physiology and Biochemistry College of Life Sciences Zhejiang University Hangzhou 310058 P.R. China

As a retrotransposon, TOS17 was a useful tool for rice genetic and functional genomic research. To ascertain the feasibility of constructing a TOS17 insertion mutation library in the rice cultivar Shishoubaimao, the genetic and expression characteristics of TOS17 were analyzed. We made solid and suspension tissue cultures and confirmed the copy numbers of TOS17 at different time points in both tissue culture processes by real-time quantitative PCR （RT-qPCR）. Three primary copies of TOS17 were detected in naturally grown Shishoubaimao. TOS17 was activated by tissue culture, and the copy numbers of TOSI7 increased along with a prolonged tissue culture time in both the Nipponbare and the Shishoubaimao cultivars. Therefore, Shishoubaimao is a potential candidate for constructing a TOS17 insertion mutant library. Compared with Nipponbare, TOS17 was more active in Shishoubaimao during tissue culture. Higher copy numbers of TOS17 were obtained with the suspension tissue culture process than with the solid tissue culture process over the same time courses. We concluded that 3-4 months of suspension tissue culture time is suitable for constructing a TOS17 insertion mutant library in Shishoubaimao.

关键词： Shishoubaimao tissue culture TOS17 copy number insertion mutant library

Modelling of multi-bodies in close proximity under water waves——Fluid resonance in narrow gaps

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Science China(Physics,Mechanics & Astronomy) 2011年第1期54卷 16-25页

作者： LU Lin1,2,TENG Bin3,CHENG Liang 4,SUN Liang5 & CHEN XiaoBo6 1 Center for Deepwater Engineering,Dalian university of Technology,Dalian 116024,China 2 state Key laboratory of Structural Analysis for Industrial Equipment,Dalian university of Technology,Dalian 116024,China 3 state Key laboratory of Coastal and Offshore Engineering,Dalian university of Technology,Dalian 116024,China 4 School of Civil and Resource Engineering,The university of Western Australia,Crawly 6003,Australia 5 Centre for Offshore research and Engineering,Department of Civil Engineering,National university of Singapore,117576,Singapore 6 research Department,Bureau Veritas,Neuilly-Sur-Seine,92570,France Center for Deepwater Engineering Dalian University of Technology Dalian China state Key laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian China state Key laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian China School of Civil and Resource Engineering The University of Western Australia Crawly Australia Centre for Offshore research and Engineering Department of Civil Engineering National University of Singapore Singapore Singapore research Department Bureau Veritas Neuilly-Sur-Seine France

Viscous fluid model and potential flow model with and without artificial damping force(f=-μV,μ the damping coefficient and V the local averaging flow velocity) are employed in this work to investigate the phenomenon of fluid resonance in narrow gaps between multi-bodies in close proximity under water *** numerical results are compared with experimental data available in the *** comparison demonstrates that both the viscous fluid model and the potential flow model are able to predict the resonant frequency reasonably *** the conventional potential flow model(without artificial damping term) significantly over-predicts the wave height in narrow gaps around the resonant *** order to calibrate the appropriate damping coefficient used for the potential model and make it work as well as the viscous fluid model in predicting the resonant wave height in narrow gaps but with little computational efforts,the dependence of damping coefficient μ on the body geometric dimensions is examined considering the parameters of gap width Bg,body draft D,body breadth ratio Br and body number n(n = 2,3),where Br = BB/BA for the case of two bodies(Body A and Body B) with different breadths of BA and BB,*** was confirmed that the damping coefficient used for the potential flow model is not sensitive to the geometric dimensions and spatial *** was found that μ∈ [0.4,0.5] may guarantee the variation of Hg/H0 with kh to be generally in good agreement with the experimental data and the results of viscous fluid model,where Hg is the excited wave height in narrow gaps under various dimensionless incident wave frequencies kh,H0 is the incident wave height,k = 2π/L is the wave number and h is the water depth.

关键词： narrow gap fluid resonance water wave viscous fluid model potential flow model finite element method boundary element method

The coupling instability of Rossby and topographic Rossby waves in the equatorial area

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Science China Earth Sciences 2005年第10期48卷 1792-1801页

作者： CHAO Jiping1,2, LIU Lin1,3 & YU Weidong1 1. laboratory of Marine Science and Numerical Modeling, state Oceanic Administration, Qingdao 266061, China 2. National research Center for Marine Environmental Forecasts, state Oceanic Administration, Beijing 100081, China 3. Ocean university of China, Qingdao 266003, China state Oceanic Administration Ocean university of China

In case of considering the fact that the tropical ocean thermocline or the lower at-mosphere height field has the meridional variation, the topographic Rossby wave will be excited. Also the background geostrophic current emerges. Under such conditions, the topographic Rossby wave can interact with the classical Rossby wave at some parameter band and thus brings a new kind of instability, which may be of potential application in understanding some phenomena of the ENSO cycle.

关键词： thermocline variation, equatorial jet, Rossby wave, topographic Rossby wave, coupling instability

Carbon and sulfur isotopic compositions of basal Datangpo Formation, northeastern Guizhou, South China:Implications for depositional environment

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Progress in Natural Science:Materials International 2008年第4期18卷 421-429页

作者： Xi Chen, Da Li, Hong-Fei Ling , Shao-Yong Jiang state Key laboratory for Mineral Deposit research, Department of Earth Sciences, Nanjing university, Nanjing 210093, China state Key laboratory for Mineral Deposit research Department of Earth Sciences Nanjing University Nanjing 210093 China

Isotopic compositions of Mn-carbonate and organic carbon from the same individual samples and sulfur isotopic compositions of pyrites in the basal Datangpo Formation were analyzed. Highly 34S-enriched pyrites (d34Spyrite=31.7-59.4‰) were precipitated in rel- atively occlusive pore water under anoxic condition in sediments, which is consistent with the observation of large and scattered pyrite framboids. The sulfidic deep ocean was not "oxidized" in the early Datangpo interglacial interval, thus the level of seawater sulfate remained low and marine d34Ssulphate remained high. Low d13Ccar (average 7.4‰) and abnormal relationship between d13Ccar and frac-tionation (Dcar-org) imply that the negative d13Ccar excursion may have resulted from oxidation of part of a large organic carbon reser-voir. High Dcar-org (average 25.1‰) implicates high CO2 level in the atmosphere. Small standard deviation (1.0‰) of d13Ccar values indicates the Mn-carbonate was precipitated near the water-sediment interface under dysoxic conditions rather than in occlusive pore water in sediments.

关键词： Cisotope S isotope Paleoenvironment Datangpo Mn-carbonate

Finite Element Analysis of Die Geometry and Process Conditions Effects on Equal Channel Angular Extrusion for β-Titanium Alloy

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Journal of Iron and Steel research International 2012年第10期19卷 54-58页

作者： SI Jia-yong1,2, GAO Fan3, ZHANG Ji3 (1. state Key laboratory of Powder Metallurgy, Central South university, Changsha 410083, Hunan, China 2. College of Mechanical and Electrical Engineering, Central South university of Forestry and Technology, Changsha 410004, Hunan, China 3. High Temperature Material research Division, Central Iron and Steel research Institute, Beijing 100081, China) state Key laboratory of Powder Metallurgy Central South University Changsha Hunan China College of Mechanical and Electrical Engineering Central South University of Forestry and Technology Changsha Hunan China High Temperature Material research Division Central Iron and Steel Research Institute Beijing China

The finite element analysis was applied to evaluate the respective influences of die geometry and process conditions on plastic strain distribution for β-titanium (Ti-13V11Cr3Al) alloy during the equal channel angular extrusion (ECAE). It was found that optimum equal channel angular extrusion die geometry is strongly material dependent. Optimal strain homogeneity in the Ti-13V11Cr3Al alloy may be achieved at r (inner radius)=5 mm, R (outer radius)=3 mm. The equivalent plastic strain increases with increasing friction coefficient. And the better homogeneity of the equivalent plastic strain distribution can be achieved when friction coefficient value is lower. The faster the ram speed is, the lower the homogeneity of the equivalent plastic strain distribution is and the influence is slight. The back-pressure does not help to improve the plastic strain homogeneity, and the increasing temperature has a slightly favourable effect on the plastic strain homogeneity between 400 and 600 ℃.

关键词： equal channel angular extrusion finite element analysis die geometry β-titanium

Final Temperature Prediction Model of Molten Steel in RH-TOP Refining Process for IF Steel Production

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Journal of Iron and Steel research International 2012年第3期19卷 1-5页

作者： WANG Yu-nan1, BAO Yan-ping1, CUI Heng2, CHEN Bin3, JI Chen-xi3 (1. state Key laboratory of Advanced Metallurgy, university of Science and Technology Beijing, Beijing 100083, China 2. Engineering research Institute, university of Science and Technology Beijing, Beijing 100083, China 3. Shougang research Institute of Technology, Beijing 100041, China) state Key laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing China Engineering research Institute University of Science and Technology Beijing Beijing China Shougang research Institute of Technology Beijing China

In order to precisely control the final temperature of molten steel in RH （Ruhrstahl Heraeus）-TOP blowing refining, the final temperature prediction models of molten steel in RH-TOP blowing refining process for Interstitial Free （IF） steel production were established under the condition of oxygen blowing and non-oxygen blowing respec- tively. The results show that the beginning molten steel temperature of refining and the amount of added scrap were influential factors, the baking temperature in vacuum chamber was a factor that had small influence. When the model was operated, the hitting probability was above 95%（under the condition of both oxygen blowing and non-oxygen blo- wing） of prediction deviation ±10℃. The accuracy is analyzed.

关键词： RH-TOP molten steel temperature prediction model

Wind-resistant studies on tall buildings and structures

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Science China(Technological Sciences) 2010年第10期53卷 2630-2646页

作者： GU Ming state Key laboratory of Disaster Reduction in Civil Engineering, Tongji university, Shanghai 200092, China state Key laboratory of Disaster Reduction in Civil Engineering Tongji University Shanghai China

This paper introduces some aspects of wind-resistant studies of our research team on tall buildings and structures. Wind tunnel tests were carried out on 27 typical tall building models by using wind pressure scanning and HFFB techniques. The characteristics of wind pressures and forces acting on these buildings were analyzed. Some results have been adopted in a Shanghai code for structural design of steel tall buildings. Interference effects on wind forces and wind pressures among two and three tall buildings were experimentally investigated with about 10000 testing conditions. Regression analyses of the interference factors under different parameter conditions were made and the main regression formulas are presented. Theoretical study on equivalent static wind loads of tall buildings and structures are then introduced. Especially,a new concept of "mode coupling factor" and a modified SRSS method for wind response and equivalent static wind load of complicated tall buildings and structures with consideration of multi mode contributions and their coupling effects are presented. Finally,practical applications of wind-resistant studies on tall building and structures,taking the Guangzhou New TV Tower as an example,are presented.

关键词： tall building and structure wind pressure and force interference effect equivalent static wind load application

Estimation of Cellobiohydrolase I Activity by Numerical Differentiation of Dynamic Ultraviolet Spectroscopy

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Acta Biochimica et Biophysica Sinica 2006年第6期38卷 372-378页

作者： Bin WU Yue ZHAO Pei-Ji GAO The state Key laboratory of Microbial Technology,Shandong university,Jinan 250100,China The state Key laboratory of Microbial Technology Shandong UniversityJinan 250100 China

1,4-β-D-glucan cellobiohydrolase I （CBH I）,p-nitrophenyl β-D-cellobioside,p-nitrophenol andcellobiose show distinct ultraviolet spectra,allowing the design of an assay to track the dynamic process ofp-nitrophenyl β-D-cellobioside hydrolysis by CBH *** on the linear relationship between p-nitrophenolformation in the hydrolysate and its first derivative absorption Curve of AUC340400nm（area under the curve）,a new sensitive assay for the determination of CBH I activity was *** dynamic parameters ofcatalysis reaction,such as Vm and kcat,can all be derived from this *** influence of β-glucosidase andendoglucanase in crude enzyme sample on the assay was discussed in *** approach is useful foraccurate determination of the activity of CBHs.

关键词： cellobiohydrolase dynamic spectrum area under the curve(AUC)