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The topological configuration and conformational analysis of mRNA in translation

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Chinese science Bulletin 2002年第5期47卷 384-389页

作者： LIU Shuqun & LIU Ciquankunming Institute of Zoology, Chinese Academy of sciences, kunming 650223, china Modern Biological center, Yunnan university, kunming 650091, china kunming Institute of Zoology Chinese Academy of Sciences Kunming China Modern Biological center Yunnan University Kunming China

The theoretical model construction of mRNA hairpin structure and single-stranded structure as well as the simulation studies on RNA structure determined by the X-ray crystal diffraction and nuclear magnetic resonance revealed that in translation, after mRNA being unfolded into single-stranded structure, its topological configuration was closely correlative with the original hairpin structure. The conformational features of single-stranded mRNA appeared as helical regions alternating with curly regions to different extents, which might exert the influence on the folding of nascent polypeptide by various regulating effects including different translational rates.

关键词： hairpin structure of mRNA topological configuration of single-stranded mRNA.

The Superiority Analysis on Characteristics and Relative Factorsof Systems

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Systems science and Systems Engineering 1998年第3期8卷 60-63页

作者： Chen Shilian kunming university of science and technology, kunming 650093

In this paper, on the basis of the incidence space and absolute incidence degree, the absolute incidence matrix is given, which is characteristics behaviour and relative factors behaviour of systems. lastly, we advanc... 详细信息

关键词： incidence space absolute incidence degree incidence matrix

Activity Calculation in Complex Metallurgical Molten Slag Systems Based on Regular Solution Model

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Journal of Iron and Steel Research International 2012年第3期19卷 6-10页

作者： HOU Yan-qing,XIE Gang,TAO Dong-ping,YU Xiao-hua,LI Rong-xing (Faculty of Metallurgical and Energy Engineering,kunming university of science and technology,kunming 650093,Yunnan,china) Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming Yunnan China

The activity of FetO is very important in ironmaking and steelmaking process. In order to predict the activ- ity of Fe, O and optimize the operation conditions in ironmaking and steelmaking process, by application of regular so lution model in molten slag systems, FeO-Fe2 O3-SIO2 ternary system, FeO-Fe2 O3-SiO2-CaO and FeO-Fe2 O3-SiO2-NiO quaternary systems have been studied by the chemical equilibrium between H2/H20 gas mixture and liquid slag con tained in solid iron. The values of interaction energy between cations concerning steelmaking slags have been deter- mined by application of ferric-ferrous iron equilibrium and iron-ferric iron equilibrium. And then the activity of Fe, O can be calculated. The results show that the relative error is 3.9% in FeO-Fe203-SiO2 system and 18% in FeO- Fe203-SiO2 CaO system. The prediction of activities of FetO in the systems are in good agreement with the measure- ments and the regular solution model is valid for predicting the activity of FetO in complex molten slags systems. The activity of Fe, O in FeO-Fe20a-NiO system have not been tested presently, and the calculated result can not be assessed.

关键词： regular solution model metallurgical molten slag activity

Methods for mineral resources assessment based on GIS in Gejiu

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中国有色金属学会会刊：英文版 2005年第S1期15卷 184-186页

作者： ZHU Da-ming, FANG Yuan-min (kunming university of science and technology, kunming 650093, china)

Gejiu Tin District is an old mine with a long exploitation history, but its resource is nearly used up at present. The research in mineral resources assessment based on GIS plays a more important and particular role in development of Gejiu. Now mineral resources assessment has been guided by new theories. It makes full use of a large information data of geology, geophysics, geochemistry and remote sensing, which are obtained from current geology exploration, in order to carry out integration mineral analysis, assessment, and to research into the data farther in high levels. At present, the processing of data by computer technique has become more powerful, because GIS was developed in recent years. Particularly, GIS has opened up vast prospects for integrated processing of geoscience data and prognosis of ore resources. GIS can analyze, extract mineral information, quantitatively assess mineral resources, delineate tractes, construct variables, carry out prospecting targets selection and so on.

关键词： GIS ore-prognosis mineral resources assessment optimization of prospecting targets

STRUCTURE AND PROPERTIES OF RE-Ni-B-Al_2O_3 COATING MATERIAL

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Acta Metallurgica Sinica(English Letters) 1997年第1期10卷 56-60页

作者： Z.C Guo X.W Yang, H.K Lin, Z.Y Wang and M. Wang(Department of Metallurgy, kunming university of science and technology kunming 650093, china) kunming Univ of science and Technology Kunming China

The effects of heat treatment temperature on the hardness, wear resistance and structure of a coating material consisting of Ni-0.45wt% RE4.8wt% B-6.2wt% Al2O3 have been discussed. The results showed that the hachess and wear resistance of the composite material reach the optimal values when heating temperature rises to 350℃ and 500℃ respectivelg. X-ray diffraction and scanning electron microscopy indicate that the composite material is amorphous in the as-coating state. The crystallized temperature of Ni-B alloy is increased when RE and Al2O3 particles are inserted. The hardness and wear resistance of the composite are raised obviously with addition of RE and Al2O3 particles.

关键词： RE-Ni-B-Al_2O_3 composite material amorphous structure

STUDY ON TURBULENCE FEATURES NEAR AN OSCILLATING CURVED WALL

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Journal of Hydrodynamics 2007年第3期19卷 255-263页

作者： WANG Wen-quan ZHANG Li-xiang YAN Yan GUO Yakun Department of Engineering Mechanics Kunming University of Science and Technology Kunming 650051China Department of Engineering University of Aberdeen Aberdeen AB24 3UE UK

In pursuit of possibly true turbulent characters and for exploring a change in turbulence structures near an oscillating flexible wall-curved surface, a sinusoidal oscillation mode was forced to a curved wall, whose vibrations disturbed the flow with an interacting effort between the fluid and the structure. The methodology used was the Large Eddy Simulation （LES） with fluid-structure interaction. The oscillating configuration was on a Fourier sinusoidal mode from the measurements of a Francis hydro turbine blade vibration. The effects of the vibration on the skin friction coefficient, vortices, turbulent coherent structures, and other statistical quantities were studied. The results showed that the streamwise velocity gradient along the normal direction and the normal velocity gradient along the spanwise direction were considerably increased within the viscous sublayer because of the oscillating wall, which additionally caused the low speed streaks to stay away from the wall and the high-momentum flows to be toward the wall. As a result, the streamwise vortices were much more elongated along the downstream to get an energy balance, and the wall skin friction coefficient or the wall friction velocity rose up.

关键词： turbulent flow turbulent structure Large-Eddy Simulation (LES) fluid-structure interaction

Neuroglobin mutation associated with hypoxia adaptation in Tibet chicken

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Progress in Natural science:Materials International 2007年第12期17卷 1419-1424页

作者： Zhang Lifan1, Liu Chong2, Lian Linsheng3, Zhao Chunjiang1, Bao Haigang1 and Wu Changxin1(1. College of Animal science and technology, china Agricultural university, Beijing 100094, china 2. College of Biological science, china Agricultural university, Beijing 100094, china 3. College of Animal science and technology, Yunnan Agricultural university, kunming 650201, china) College of Animal science and technology China Agricultural University Beijing 100094 China College of Biological science China Agricultural University Beijing 100094 China College of Animal science and technology Yunnan Agricultural University Kunming 650201 China

Globin protein family plays an important role in storing and transporting oxygen. As a newly reported globin, the revealed function of neuroglobin includes binding and storing oxygen as well as facilitating the utilization of oxygen in neuronal cells. In the present study, mutations in exons of chicken Ngb gene were identified with the method of sequencing and created restriction site PCR in Tibet chicken and other four lowland chicken breeds. The mutations of Lys-2224(E4)-Asn and Ser-2279(E4)-Gly were identified in exon 4 of the gene. The Lys-2224(E4)-Asn mutation existed only in Tibet chicken and the mutation frequencies increased with increasing altitude. Analysis of the haplotype and diplotype of the two mutations in Tibet chicken populations of different altitudes showed that the frequencies of TG haplotype and TTGG diplotype also increased with increasing altitude, while the reverse tendency was found on GGAA diplotype. Under the hypoxic simulation incubation, the main haplotype was TG in living embryos and GA in dead embryos. The results showed that the Lys-2224(E4)-Asn mutation may be a specific mutation associated with hypoxia adaptation in Tibet chicken.

关键词： Tibet chicken neuroglobin hypoxia adaptation Ngb gene mutation.

RESEARCH ON SYNCHRONOUS DOUBLESOLITON ON HELICAL CHAIN MODEL OFTHE α-HELIX PROTEIN

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Acta Mathematica Scientia 1999年第3期19卷 307-314页

作者：吴光敏雷玉明周熠颖周凌云 Research center of Nonlinear science Kunming University of Science and Technology Kunming 650093 China

Increase a degree of freedom for one dimension dynamical system of the α-helix protein, obtaining the dynamical system model of double degree of freedom. In this new dynamical system there are the solution of double soliton on the polypeptide chain of α-helix protein, and the coupling intensity of the double soliton relate obviously with their center distance. The solution of the synchronous double soliton has been studied by the analytical method for two cases of the stronger and weaker coupling. The possible effect brought by tile double soliton for the protein property has been discussed.

关键词： α-helix protein degree of freedom soliton

Studies on High Temperature Oxidation of Electrodeposited RE-Ni-W-P-SiC Composite Materials

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材料热处理学报 2004年第5B期25卷 1126-1129页

作者： ZHUXiao-yun XURui-dong GUOZhong-cheng ThecenterofNewMaterialsandSurfaceEngineeringResearchandDevelopment KunmingUniversityofScienceandTechnologyKunming650093PR.China

The oxidation of the Electrodeposited RE-Ni-W-P-SiC Composite materials at high temperature is investigated. The results show that during high temperature oxidation the relationship between the mass change of pure Ni, Ni-W-P, Ni-W-P-SiC or RE-Ni-W-P-SiC coatings and the oxidation time follows a mixed curve, i.e. it is approximately a linear relationship when the oxidation time is less than 60 mins while it is a power function relationship when the oxidation time is over 60 mins. The order for the oxidation rate of the four coatings is Ni> Ni-W-P> Ni-W-P-SiC>RE-Ni-W-P-SiC. The mass change of Ni-W-P, Ni-W-P-SiC or RE-Ni-W-P-SiC coatings increases exponentially with a rise of oxidation temperature. The high temperature-oxidation resistance of RE-Ni-W-P-SiC composite material is 3-4 times than that of Ni-W-P alloy coating. The cross section morphologies and X-ray diffraction patterns indicate that the high temperature-oxidation resistance of RE-Ni-W-P-SiC composite coating is better than any other coatings.

关键词：高温氧化 RE-Ni-W-P-SiC 复合材料显微结构电镀层