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| 1 | On adjacent-vertex-distinguishing total coloring of graphs显示文摘In this paper, we present a new concept of the adjacent-vertex-distinguishing total coloring of graphs (briefly, AVDTC of graphs) and, meanwhile, have obtained the adjacent-vertex-distinguishing total chromatic number of some graphs such as cycle, complete graph, complete bipartite graph, fan, wheel and tree. | ZHANG Zhongfu, CHEN Xiang’en, LI Jingwen, YAO Bing, LU Xinzhong & WANG Jianfang College of Mathematics and Information Science, Northwest Normal University, Lanzhou 730070, China Department of Computer, Lanzhou Normal College, Lanzhou 730070, China Institute of Applied Mathematics, Lanzhou Jiaotong University, Lanzhou 730070, China College of Information and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China Institute of Applied Mathematics, Chinese Academy of Sciences, Beijing 100080, China | 2005 | Science China Mathematics2005，48，3： | 173 |
| 2 | D(β)-vertex-distinguishing total coloring of graphs显示文摘A new concept of the D(β)-vertex-distinguishing total coloring of graphs, i.e., the proper total coloring such that any two vertices whose distance is not larger than β have different color sets, where the color set of a vertex is the set composed of all colors of the vertex and the edges incident to it, is proposed in this paper. The D(2)-vertex-distinguishing total colorings of some special graphs are discussed, meanwhile, a conjecture and an open problem are presented. | ZHANG Zhongfu,LI Jingwen,CHEN Xiang’en,YAO Bing, WANG Wenjie & QIU Pengxiang Institute of Applied Mathematic, Lanzhou Jiaotong University, Lanzhou 730070, China College of Mathematics and Information Science, Northwest Normal University, Lanzhou 730070, China College of Information and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China | 2006 | Science China Mathematics2006，49，10： | 54 |
| 3 | Changes in plant biomass and species composition of alpine Kobresia meadows along altitudinal gradient on the Qinghai-Tibetan Plateau显示文摘Alpine Kobresia meadows are major vegetation types on the Qinghai-Tibetan Plateau. There is growing concern over their relationships among biodiversity, productivity and environments. Despite the im-portance of species composition, species richness, the type of different growth forms, and plant bio-mass structure for Kobresia meadow ecosystems, few studies have been focused on the relationship between biomass and environmental gradient in the Kobresia meadow plant communities, particularly in relation to soil moisture and edaphic gradients. We measured the plant species composition, her-baceous litter, aboveground and belowground biomass in three Kobresia meadow plant communities in Haibei Alpine Meadow Ecosystem Research Station from 2001 to 2004. Community differences in plant species composition were reflected in biomass distribution. The total biomass showed a de-crease from 13196.96±719.69 g/m2 in the sedge-dominated K. tibetica swamp to 2869.58±147.52 g/m2 in the forb and sedge dominated K. pygmaea meadow, and to 2153.08±141.95 g/m2 in the forbs and grasses dominated K. humilis along with the increase of altitude. The vertical distribution of below-ground biomass is distinct in the three meadow communities, and the belowground biomass at the depth of 0-10 cm in K. tibetica swamp meadow was significantly higher than that in K. humilis and K. pygmaea meadows (P<0.01). The herbaceous litter in K. tibetica swamp was significantly higher than those in K. pygnaeca and K. humilis meadows. The effects of plant litter are enhanced when ground water and soil moisture levels are raised. The relative importance of litter and vegetation may vary with soil water availability. In the K. tibetica swamp, total biomass was negatively correlated to species richness (P<0.05); aboveground biomass was positively correlated to soil organic matter, soil moisture, and plant cover (P<0.05); belowground biomass was positively correlated with soil moisture (P<0.05). However, in the K. pygnaeca and K. humilis meadow communities, aboveground biomass was posi-tively correlated to soil organic matter and soil total nitrogen (P<0.05). This suggests that the distribu-tion of biomass coincided with soil moisture and edaphic gradient in alpine meadows. | WANG ChangTing1,3, CAO GuangMin1, WANG QiLan1, JING ZengChun1, DING LuMing1 & LONG RuiJun2 1 Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810001, China 2 College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730070, China 3 Graduate University of the Chinese Academy of Sciences, Beijing 100039, China | 2008 | Science China(Life Sciences)2008，51，1： | 31 |
| 4 | Genetic diversity in Chinese modern wheat varieties revealed by microsatellite markers显示文摘Genetic diversity of 1680 modern varieties in Chinese candidate core collections was analyzed at 78 SSR loci by fluorescence detection system. A total of 1336 alleles were detected, of which 1253 alleles could be annotated into 71 loci. For these 71 loci, the alleles ranged from 4 to 44 with an average of 17.6, and the PIC values changed from 0.19 to 0.89 with an average of 0.69. (1) In the three genomes of wheat, the average genetic richness was B>A>D, and the genetic diversity indexes were B>D>A. (2) Among the seven homoeologous groups, the average genetic richness was 2=7>3>4>6>5>1, and the genetic diversity indexes were 7>3>2>4>6>5>1. As a whole, group 7 possessed the highest genetic diversity, while groups 1 and 5 were the lowest. (3) In the 21 wheat chromosomes, 7A, 3B and 2D possessed much higher genetic diversity, while 2A, 1B, 4D, 5D and 1D were the lowest. (4) The highest average genetic diversity index existed in varieties bred in the 1950s, and then it declined continually. However, the change tendency of genetic diversity among decades was not greatly sharp. This was further illustrated by changes of the average genetic distance between varieties. In the 1950s it was the largest (0.731). Since the 1960s, it has decreased gradually (0.711, 0.706, 0.696, 0.695). The genetic base of modern varieties is becoming narrower and narrower. This should be given enough attention by breeders and policy makers. | HAO Chenyang, WANG Lanfen, ZHANG Xueyong, YOU Guangxia, DONG Yushen, JIA Jizeng, LIU Xu, SHANG Xunwu, LIU Sancai & CAO Yongsheng Key Laboratory of Crop Germplasm & Biotechnology, MOA, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China Agronomy College, Gansu Agricultural University, Lanzhou 730070, China | 2006 | Science China(Life Sciences)2006，49，3： | 19 |
| 5 | Effect of areca on contraction of colonic muscle strips in rats显示文摘AIM: To investigate the effects of areca on the contractileactivity of isolated colonic muscle strips in rats andmechanism involved.METHODS: Each strip (LMPC, longitudinal muscle ofproximal colon; CMPC, circular muscle of proximal colon;LMDC, longitudinal muscle of distal colon; CMlC, circularmuscle of distal colon. ) was suspended in a tissue chambercontaining 5 mL Krebs solution (37 ℃), bubbledcontinuously with 950 mL@ L-1 O2 and 50 mL@ L-1 CO2 . Themean contractile amplitude (A), the resting tension (T),and the contractile frequency (F) were simultaneouslyrecorded on recorders.RESULTS: Arsca dose dependently increased the meancontractile amplitude, the resting tension of proximal anddistal colonic smooth muscle strips in rats ( P < 0.05). Italso partly increased the contractile frequency of colonicsmooth muscle strips in rats ( P < 0.05). The effects werepartly inhibited by atropine (the resting tension of LMPCdecreased from 0. 44 ± 0. 12 to 0. 17 ± 0.03; the restingtension of LMDC decreased from 0.71 ± 0.14 to 0.03 ± 0.01;the mean contractile amplitude of LMPC increased from -45.8 ± 7.2 to -30.5 ± 2.9; the motility index of CMDC decreasedfrom 86.6± 17.3 to 32.8 ± 9.3; P< 0.05 vs areca), but theeffects were not inhibited by hexamethonium (P> 0.05).CONCLUSION: Areca stimulated the motility of isolatedcolonic smooth muscle strips in rats. The stimulation ofareca might be relevant with M reoeptor partly. | Dong-Ping Xie Lian-Bi Chen,Department of Physiology,Medical College,Shandong University,Jinan 250012,Shandong Province,China Wei Li Song-Yi Qu Tian-Zhen Zheng,Department of Physiology,Lanzhou Medical College,Lanzhou 730000,Gansu Province,China Ying-Li Yang,Northwest Normal University,Lanzhou 730070,Gansu Province,China Yong-Hui Ding Yu-Ling Wei,Drug Control Institute of Gansu Province,Lanzhou 730000,Gansu Province,China | 2002 | World Journal of Gastroenterology2002，8，2： | 18 |
| 6 | Sol-gel preparation and characterization of Co_3O_4 nanocrystals显示文摘A new citrate acid-hydrazine sol-gel route for preparation of Co3O4 nanoparticles has been developed. Co3O4 nanoparticles with different particle-sizes and morphology were prepared at different heat-treatment temperatures and the pure cubic nanocrystals of Co3O4 were obtained at 600℃. The synthesis process was monitored by infrared spectroscopy (IR), thermal gravimetric and differential thermal analysis (TG-DTA). The structure and morphology of Co3O4 nanocrystals were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and X-ray-photoelectron spectroscopy (XPS). The infrared absorption bands blueshifted with particle size decreasing, which could be attributed to increasing surface effect. XPS results showed that predominant species at surface layers of Co3O4 nanocrystals are octahedral Co (Ⅲ). | Jinzhang Gao, Yanchun Zhao, Wu Yang, Jianniao Tian, Fei Guan. and Yongjun MaChemistry and Chemical Engineering College, Northwest Normal University, Lanzhou 730070, China | 2003 | Journal of University of Science and Technology Beijing2003，10，1： | 13 |
| 7 | The environmental signal of an early Holocene pollen record from the Shiyang River basin lake sediments, NW China显示文摘Pollen analyses of 85 samples from the San-jiaocheng section well along the margin of a palaeolake at the end of the Shiyang River, NW China, show that Picea and Sabina dominate the pollen assemblage. Together they reach as high as 40%-60%, with the percentage of Picea varying inversely with that of Sabina. Similar results were obtained from another section in the Shiyang River drainage. Using modern ecological habitat relationship analogues, pol-len transport characteristics, and the overall pollen assem-blage, we propose that both Picea and Sabina pollen were transported by the river from the mountains at the upper reaches of the Shiyang River, and that the assemblage is more indicative of changes in upland vegetation than of local conditions near the section. This interpretation is supported by pollen data derived from surface samples, water samples, and riverbed samples. Using a moisture indicator (the Picea to Sabina ratio) and calculated pollen concentrations, we identify a series of | ZHU Yan, CHEN Fahu & Madsen DavidCollege of geography and Environment, Northwest Normal University, Lanzhou 730070, China National Key Laboratory of West Environmental System, Lanzhou University, Lanzhou 730000, China Utah Geological Surv | 2002 | Chinese Science Bulletin2002，47，4： | 10 |
| 8 | Spectrofluorimetric determination of terbium(Ⅲ) by fluorescence enhancement system of Tb-TPA-Triton X-100 by La^(3+)显示文摘The phenomenon of fluorescence enhancement for the system of terbium(Ⅲ) with terephthalic acid (benzene-1,4-dicarboxylic acid (TPA)) in the presence of an excess of La^3+ in Triton X-100 aqueous solution has been studied. The fluorescence intensity of Tb^Ⅲ-TPA system can be greatly increased by La^3+. The intermolecular transfer of energy was responsible for the mechanism of the fluorescence enhancement. Triton X-100 plays an imporlant role for the stabilization of the system. The system, having the maximum excitation and emission wavelengths at 256nm and 546nm, respectively,shows a constant fluorescence intensity over the pH range between 4-6. The fluorescence intensity is a linear function of Tb^3+ concentration in the range of 1.00×10^-8 -2.56× 10^-5 mol·L^-1 and the limit of detection is 5.00×10^-9 mol·L^-1. | ZHAO Guohu and ZHAO JunBasic Science Department, Gansu Agricultural University, Lanzhou 730070, China (Received 2002-04-29) | 2003 | Rare Metals2003，22，2： | 9 |
| 9 | Anderson's Cognitive Theory and Learning Strategy Studies in Second Language Acquisition显示文摘Second language acquisition can not be understood without addressing the interaction between language and cognition. Cognitive theory can extend to describe learning strategies as complex cognitive skills. Theoretical developments in Anderson’s production systems cover a broader range of behavior than other theories, including comprehension and production of oral and written texts as well as comprehension, problem solving, and verbal learning.Thus Anderson’s cognitive theory can be served as a rationale for learning strategy studies in second language acquisition. | Lu Wenpeng (Foreign Languages department, Northwest Normal University, Lanzhou, 730070, China) | 2000 | 兰州大学学报(社会科学版)2000，28，S1： | 9 |
| 10 | 羊肚菌发酵液对小鼠抗疲劳作用试验研究显示文摘本研究对羊肚菌发酵液的抗疲劳作用进行了动物实验。结果表明,羊肚菌发酵液能明显提高机体糖原储备(肌糖原和肝糖原),使小鼠血红蛋白含量升高,血乳酸含量降低,小鼠运动能力和耐疲劳能力显著加强。 | Yun Jianmin (Department of Food Engineering,Gansu Agricultural University,Lanzhou 730070,China) | 1997 | 卫生研究1997，26，5： | 8 |
| 11 | The lower bounds of classic Ramsey number R(5,9). and R (5,10)显示文摘IT is very difficult to establish the Ramsey number, so we often use the way of getting the up-per and lower bound of the Ramsey number to near the exact value. All lower bounds of R (5,l) known so far are shown in table 1. | XIE Jiguo and ZHANG Zhongfu1. Lanzhou Normal College, Lanzhou 730070, China 2. Lanzhou Railway Institute, Lanzhou 730070, China | 1997 | Chinese Science Bulletin1997，42，14： | 8 |
| 12 | Multifield coupling model and its applications for pile foundation in permafrost显示文摘Importing the interface element which links the frozen soil base with concrete piles and considering the couplings of stress field, temperature field and moisture field, this paper es- tablishes the nonlinear visco-elastic plastic finite element model of pile-soil. For a practical bridge structure the stress field and displacement field of single pile in freezing process are calculated. This paper emphatically studies the process of the tangential frost heave stress field, freezing stress field and displacement field varying with time, and ulteriorly studies time variation process of single pile carrying capacity in freezing process. | WU Yaping1,2, ZHU Yuanlin2, GUO Chunxiang1, SU Qiang1 & MA Wei2 1. School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China 2. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China | 2005 | Science China Earth Sciences2005，48，7： | 7 |
| 13 | Oxidation rate in the preparation of polyferric sulfate coagulant显示文摘The oxidation rate of ferrous sulfate was investigated in the preparation of polyferric sulfate(PFS) coagulant. It was proved that this reaction is zero order with respect to Fe 2+ , first order with respect to NO\-2(g) and first order with respect to the interface area between gas phase and liquid phase. If the partial pressure of NO\-2(g) in gas phase is increased or the interface area is increased, the time needed to complete the reaction will be decreased. | CHANG Qing (Department of Environmental Engineering, Lanzhou Railway College, Lanzhou 730070, China.E\|mail:changq@mail.lzri.edu.cn) | 2001 | Journal of Environmental Sciences2001，13，1： | 5 |
| 14 | Guided wave propagation in multilayered piezoelectric structures显示文摘A general formulation of the method of the reverberation-ray matrix (MRRM) based on the state space formalism and plane wave expansion technique is presented for the analysis of guided waves in multilayered piezoelectric structures. Each layer of the structure is made of an arbitrarily anisotropic piezoelectric material. Since the state equation of each layer is derived from the three-dimensional theory of linear piezoelectricity, all wave modes are included in the formulation. Within the framework of the MRRM, the phase relation is properly established by excluding exponentially growing functions, while the scattering relation is also appropriately set up by avoiding matrix inversion operation. Consequently, the present MRRM is unconditionally numerically stable and free from computational limitations to the total number of layers, the thickness of individual layers, and the frequency range. Numerical examples are given to illustrate the good performance of the proposed formulation for the analysis of the dispersion characteristic of waves in layered piezoelectric structures. | GUO YongQiang1, CHEN WeiQiu2,3 & ZHANG YongLiang4 1 Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education, and School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China 2 Key Laboratory of Soft Soils and Geoenvironmental Engineering, Ministry of Education, and Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China 3 Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China 4 School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，7： | 4 |
| 15 | Co-Hopfian Modules of Generalized Inverse Polynomials | Zhong Kui LIU Departmemt of Mathematics.Northwest Normal University,Lanzhou,730070,P.R.China E-mail:liuzk@nwnu,edu.cnYuan FAN Department of Economics,Northwest Normal Univevsity.Lanzhou,730070,P.R.China E-mail:gxsecfy@lz.gs.cninfo.net | 2001 | Acta Mathematica Sinica,English Series2001，17，3： | 4 |
| 16 | Oleanane-triterpene Saponins from Clinopodium urticifolium显示文摘Four new oleanane triterpene saponins were isolated and purified from the whole plant of
Clinopodium urticifolium. They were 3β, 16β, 23, 28-tetrahydroxyoleana-9 (11), 12(13)-diene-3-
yl-[β-D-glucopyranosyl-(1→2)]-[β-D-glucopyranosyl-(1 →3)]- β-D-fucopyranoside 1; 3β, 16β,
21β, 23, 28-pentahydroxyoleana-9(11), 12(13)-diene-3-yl-[β-D-glucopyranosyl-(1→2)]-[ β-D-
glucopyranosyl-(1→3)]- β-D-fucopyranoside 2; 3β, 16β, 23, 28-tetrahydroxyoleana-9(11), 12(13)-
diene-3-yl-[β-D-glucopyranosyl-( 1 →6)- β-D-glucopyranosyl-( 1 →3)]-[β-D-glucopyranosyl-( 1 →2)]-
β-D-fucopyranoside 3; 3β, 16β, 23, 28-tetrahydroxyoleana-9(11), 12(13)-diene-3-yl-[β-D-gluco-
pyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl-(1→3)]-[β-D-glucopyranosyl-
(1→2)]- β-D-fucopyranoside 4. Their structures were elucidated on the basis of interpretation of
NMR and MS data and from chemical evidence. | Li Ming GAO, Xiao Mei WEI, Dong Liang CHENGDepartment of Chemistry, National Laboratory of Applied Organic Chemistry,Lanzhou University, Lanzhou 730000 Department of Chemistry, Northwest Normal University, Lanzhou 730070 | 2003 | Chinese Chemical Letters2003，14，10： | 4 |
| 17 | A study of magnetostriction, spin reorientation, and Mssbauer spectra of Tb_(0.3)Dy_(0.6)Pr_(0.1)(Fe_(1-x)Al_x)1.95 alloys with substitution of Fe by Al显示文摘The effects of Al substitution for Fe on the structure, magnetics, magnetostriction, anisotropy and spin reorientation of a series of Tb0.3Dy0.6Pr0.1(Fe1-xAlx)1.95 alloys (x=0.05, 0.1, 0.15, 0.2, 0.25, 0.3) at room temperature have been investigated. The alloys of Tb0.3Dy0.6Pr0.1(Fe1-xAlx)1.95 substantially retain MgCu2-type C-15 cubic Laves phase structure when x<0.2. The mixed phases appear with x = 0.2, and cubic Laves phase decreases with increasing x. The magnetostriction of the Tb0.3Dy0.6Pr0.1(Fe1-xAlx)1.95 alloys decreases drastically with increasing x and the giant magnetostrictive effect disappears for x > 0.15. Fortunately, a small amount of Al substitution is beneficial to a decrease in the magnetocrystalline anisotropy. The spin reorientation temperature decreases with increasing x. The analysis of the Mssbauer spectra indicates that the easy magnetization direction in the {110} plane deviates slightly from the main axis of symmetry with the increase of Al concentration x, namely, spin reorientation, resulting in the change of macroscopical magnetic properties and magnetostriction. The hyperfine field decreases, but the isomer shifts increases with Al concentration increasing and the quadruple splitting QS shows a weak concentration dependence. | ZHENG XiaoPing1,3, ZHANG PeiFeng1,2, LI FaShen2 & HAO Yuan2 1 Institute of Electronic Information Science and Technology, Lanzhou City University, Lanzhou 730070, China 2 Key Laboratory for Magnetism and Magnetic Materials, Ministry of Education, Lanzhou University, Lanzhou 730000, China 3 State Key Laboratory of Advanced Non-Ferrous Materials, Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，3： | 4 |
| 18 | Short cycle structures for graphs on surfaces and an open problem of Mohar and Thomassen显示文摘In this paper we investigate cycle base structures of a (weighted) graph and show that much information of short cycles is contained in an MCB (i.e., minimum cycle base). After setting up a Hall type theorem for base-transformation, we give a sufficient and necessary condition for a cycle base to be an MCB. Furthermore, we show that the structure of MCB in a (weighted)graph is unique. The property is also true for those having a longest length (although much work has been down in evaluating MCB, little is known for those having a longest length). We use those methods to find out some unknown properties for short cycles sharing particular properties in (unweighted) graphs. As applications, we determine the structures of short cycles in an embedded graph and show that there exist polynomially bounded algorithms in finding a shortest contractible cycle and a shortest two-sided cycle provided such cycles exist. Those answer an open problem of B. Mohar and C. Thomassen. | REN Han & DENG Mo Department of Mathematics, East China Normal University, Shanghai 200062, China College of Mathematics & Information Science, Northwest Normal University, Lanzhou 730070, China | 2006 | Science China Mathematics2006，49，2： | 4 |
| 19 | The causes and processes responsible for rocky desertification in karst areas of southern China显示文摘The karst region of southern China is a fragile ecological zone with widespread rocky desertification. This paper describes the rocky desertification occurring in this region in terms of both natural and anthropogenic factors. During geological time periods, the region's changing environment governed the natural rocky desertification processes, whereas during historical and modern times, anthropogenic processes have been superimposed on these natural processes. Human activities have accelerated and exacerbated rocky desertification. The period from the beginning to the middle of the Qing dynasty was an important transitional period in which human activities began to exert a particularly strong influence on rocky desertification. Since then, the effect of anthropogenic factors has increasingly exceeded the effect of natural factors. The rocky desertification process in southern China's karst region combines surface ecological processes (including vegetation degradation and loss, soil erosion, surface water loss, and bedrock solution) with a reduction of the land's biological productivity, leading to degradation that produces rocky desert. Controlling rocky desertification requires comprehensive development of sustainable agriculture and economic development that provides employment alternatives to agriculture and thereby promotes the rehabilitation of rocky desertified land. | Sen Li 1,2*, XingHu Wei 1, JinGuo Huang 1, XiZhi Wang 1, GuanYao Lu 1, HuiXia Li 11. Institute of Resources and Environment Science, Foshan University, Foshan, Guangdong 528000, China.2. College of Geography and Environment Science, Northwest Normal University, Lanzhou, Gansu 730070, China. | 2009 | Research in Cold and Arid Regions2009，1，1： | 3 |
| 20 | IGF-Ⅱ and IGFBP-1 reversely regulate blastocyst implantation in mouse显示文摘Insulin-like growth factor (IGF)-Ⅱ and IGF binding protein (IGFBP)-1, members of IGF family, are important in the cyclic development of endometrium and the blastocyst implantation. In the present study, the indirect immunofluorescence showed that IGF- Ⅱ and IGFBP-1 were specifically expressed at the maternal-fetal interface. In a co-culture system, IGF-Ⅱ significantly enhanced the attachment and outgrowth of the blastocyst on monolayer of uterine epithelial cells, while IGFBP-1 did not affect the blastocyst attachment, but markedly inhibited the blastocyst outgrowth. The results of zymography showed that IGF- Ⅱ enhanced the activities of MMP-2 and MMP-9, while IGFBP-1 did not affect the activities of MMP-2 and MMP-9. In conclusion, the equilibrium between the invasion of tro-phoblast and the inhibition of deciduas may be regulated by the interaction between the IGF- Ⅱ -expressing invading cy-totrophoblast and maternal deciduas-derived IGFBP-1. | TIAN Yongqiang, TIE Guodong, CAO Yujing, ZHAO Xingxu & DUAN Enkui1. State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China 2. College of Vet Medicine, Gansu Agricultural University, Lanzhou 730070, China | 2002 | Chinese Science Bulletin2002，47，21： | 3 |
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