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| 1 | Function of apoptosis and expression of the proteins Bcl-2,p53 and C-myc in the development of gastric cancer显示文摘INTRODUCTIONIn China ,the incidence and mortality of gastric cancer rank the second among all cancers. Recent development of cancer [1-20].The aim of this study was investigat the insight of apoptosis and bcl-2, p53 and C-myc protein expression in the development of gastric cancer . | An Gao Xu Shao Guang Li Ji Hong Liu Ai Hua Gan Research Laboratory of Digestive Disease,Huizhou Central People’s Hospital,Huizhou 516001,Guangdong Province,ChinaDr.An Gao Xu graduated from Guangdong Medical College in 1984.He is an associate physician-in-chief,specializing in the research and treatment of gastrointestinal and liver tumors.He has published 24 papers and 1 book. | 2001 | World Journal of Gastroenterology2001，7，3： | 91 |
| 2 | Influence of the impounding process of the Three Gorges Reservoir up to water level 172.5m on water eutrophication in the Xiangxi Bay显示文摘The water level of the Three Gorges Reservoir(TGR) rose to 172.5 m in two stages from September to November,2008.The hydrodynamic parameters and water quality parameters(e.g.flow velocity,temperature,turbidity and nutrient content) had been continuously monitored to reveal the influence of the impounding process of the TGR on the water eutrophication in the Xiangxi Bay(XXB).The maximal daily rise of the water level of the TGR was about 2.38 m.The water exchange between the mainstream(the Changjiang River) and the XXB of the TGR was enhanced by density current,and its main characteristics were a density-stratified flow in different directions.The water exchange reduced the differences of the water quality parameters(for example,temperature,turbidity,nutrient level,pH,etc.) between the mainstream and the XXB during the impounding process.Meanwhile,the water stability index in the mainstream remained small but it was lowered in the XXB.The main causes included the dilution by water of lower concentration of the chlorophyll a(Chl.a) entering from the mainstream,the decline of the water stability,and the increase of suspended silt,which induced the Chl.a to decrease in the XXB during the impounding process.The grade of the water eutrophication changed from middle eutrophic level to mesotrophic state in the process.However,as available nutrients were imported into the XXB from the mainstream during the impounding process the risk of water eutrophication increases in the XXB in the future. | YANG ZhengJian1,LIU DeFu1,JI DaoBin1,2 & XIAO ShangBin1,3 1 College of Civil & Hydroelectric Engineering,China Three Gorges University,Yichang 443002,China 2 School of Water Resources & Hydropower Engineering,Wuhan University,Wuhan 430072,China 3 Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710075,China | 2010 | Science China(Technological Sciences)2010，53，4： | 58 |
| 3 | The prognostic value of preoperative serum levels of CEA,CA19-9 and CA72-4 in patients with colorectal cancer显示文摘INTRODUCTIONCarcinoembryonic antigen ( CEA) , originally described by Gold and Freedman [1] in 1965, is now an acknowledged member of immunoglobulin superfamily[2],with a role as an intracellular adhesion molecule[3].Carbohydrate antigen 19-9(CA19-9), obtained with a monoclonal antibody produced by immunizing a monoclonal antibody produced by immunizing a mouse with a colonic cancer cell line in 1979[4],is a ligand for E-selectin that plays an important role in the addhesion of cancer cells to endothelial cells [5,6]. | Chao Xu Zheng~1 Wen Hua Zhan~1 Ji Zong Zhao~2 Dong Zheng~3 Dong Ping Wang~1 Yu Long He~1 Zhang Qing Zheng~1 ~1Department of General Surgery,~2Laboratory of Surgery,~3Department of Medicine,First Affiliated Hospital,Sun Yat-Sen University of Medical Sciences,Guangzhou 510080,Guangdong Province,ChinaDr.Chao Xu Zheng now working as a surgeon and lecturer in the Department of General Surgery,First Affiliated Hospital,Sun Yat-Sen University of Medical Sciences,who is a Ph.D.student,having 7 papers published. | 2001 | World Journal of Gastroenterology2001，7，3： | 25 |
| 4 | Diagnosis and treatment of congenital choledochal cyst: 20 years' experience in China显示文摘AIM To summarize the experience of diagnosis and treatment of congenital choledochal cyst in the past 20years ( 1980 2000).``METHODS The clinical data of 108 patients admitted from 1980 to 2000 were analyzed retrospectively.RESULTS Abdominal pain, jaundice and abdominal mass were presented in most child cases. Clinical symptoms in adult cases were non-specific, resulting in delayed diagnosis frequently. Fifty-seven patients (52.7%) had coexistent pancreatiobiliary disease. Carcinoma of the biliary duct occurred in 18 patients (16.6%). Ultrasonic examination was undertaken in 94 cases, ERCP performed in 46 cases and CT in 71 cases. All of the cases were correctly diagnosed before operation. Abnormal pancreatobiliary duct junction was found in .39 patients.Before 1985 the diagnosis and classification of congenital choledochal cyst were established by ultrasonography preoperatively and confirmed during operation, the main procedures were internal drainage by cyst enterostomy.After 1985, the diagnosis was established by ERCP and CT. and cystectomy with Roux-en-Y hepaticojejunostomy was the conventional procedures. In 1994, we reported a new and simplified operative procedure in order to reduce the risk of choledochal cyst malignancy. Postoperative complication was mainly retrograde infection of biliary tract, which could be controlled by the administration of antibiotics, there was no perioperative mortality.``CONCLUSION The concept in diagnosis and treatment of congenital choledochal cyst has obviously been changed greatly. CT and ERCP were of great help in the classification of the disease. Currently, cystectomy with Roux-en-Y hepaticojejunostomy is strongly recommended as the choice for patients with type I and type Ⅳ cysts.Piggyback orthotopic liver transplantation is indicated in type \ cysts (Carolis disease) with frequently recurrent cholangitis. | Liu-Bin Shi~1 Shu-You Peng~1 Xing-Kai Meng~1 Cheng-Hong Peng~1 Ying-Bin Liu~1 Xiao-Peng Chen~1 Zhen-Ling Ji~2 De-Tong Yang~2 Huai-Ren Chen~2 1 Department of Surgery,The Second Affiliated hospital of Zhejiang University School of Medicine,Hangzhou 310009,China2 Department of Surgery,Affiliated Zhongda Hospital of Southeast University,Nanjing 210009,China | 2001 | World Journal of Gastroenterology2001，7，5： | 18 |
| 5 | Effect of cell fusion on metastatic ability of mouse hepatocarcinoma cell lines显示文摘INTRODUCTIONItwasknownduringthe1970sthatthemalignancyofhybridomacelsdecreasedwhentumorcelswerefusedwithnormalcelsandthemalign... | JI Yan 1, LING Mao Ying 1, LI Ying 1 and XIE Hong 2 | 1999 | World Journal of Gastroenterology1999，5，1： | 12 |
| 6 | Spatial patterns of terrestrial net ecosystem productivity in China during 1981―2000显示文摘As the third largest country in the world, China has highly variable environmental condition and eco- logical pattern in both space and time. Quantification of the spatial-temporal pattern and dynamic of terrestrial ecosystem carbon cycle in China is of great significance to regional and global carbon budget. In this study, we used a high-resolution climate database and an improved ecosystem process-based model to quantify spatio-temporal pattern and dynamic of net ecosystem productivity (NEP) in China and its responses to climate change during 1981 to 2000. The results showed that NEP increased from north to south and from northeast to southwest. Positive NEP (carbon sinks) occurred in the west of Southwest China, southeastern Tibet, Sanjiang Plain, Da Hinggan Mountains and the mid-west of North China. Negative NEP (carbon sources) were mainly found in Central China, the south of Southwest China, the north of Xinjiang, west and north of Inner Mongolia, and parts of North China. From the 1980s to 1990s, the increasing trend of NEP occurred in the middle of Northeast China Plain and the Loess Plateau and decreasing trends mainly occurred in a greater part of Central China. In the study period, natural forests had minimal carbon uptake, while grassland and shrublands accounted for nearly three fourths of the total carbon terrestrial uptakes in China during 1981―2000. | TAO Bo1, CAO MingKui1, LI KeRang1, GU FengXue1, JI JinJun1,2, HUANG Mei1 & ZHANG LeiMing1 1 Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 2 Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100101, China | 2007 | Science China Earth Sciences2007，50，5： | 12 |
| 7 | Inflammatory bowel disease in Hubei Province of China显示文摘InflammatoryboweldiseaseinHubeiProvinceofChinaXIABing1,S.SHIVANANDA2,ZHANGGuiShui1,YIJiYun1,JBACRUSIUS3andASPEN~A3Subjecthe... | XIA Bing 1, S. SHIVANANDA 2, ZHANG Gui Shui 1, YI Ji Yun 1, JBA CRUSIUS 3 and AS PE N~ A 3 | 1997 | World Journal of Gastroenterology1997，3，2： | 12 |
| 8 | Effects of Fuzhenghuayu decoction on collagen synthesis of cultured hepatic stellate cells,hepatocytes and fibroblasts in rats显示文摘INTRODUCTIONLiverfibrosisisthecommonpathologicalfeatureofchronicliverdiseases,andiscloselyasociatedwithchangesoflivercelfunct... | LIU Cheng 1, LIU Ping 1, LIU Cheng Hai 1, ZHU Xiu Qing 1 and JI Guang 1 | 1998 | World Journal of Gastroenterology1998，4，6： | 11 |
| 9 | Numerical simulation and application of three-dimensional oil resources migration-accumulation of fluid dynamics in porous media显示文摘Numerical simulation of oil migration and accumulation is to describe the history of oil migration and accumulation in basin evolution. It is of great value in evaluation of oil resources and determination of the location and amount of oil deposits. Based on such actual conditions as the effects of fluid mechanics in porous media and 3-dimensional geology characteristics,a kind of modified method of second order upwind finite difference fractional steps implicit interactive scheme was put forward. As for the actual problem of Dongying hollow,Huimin hollow,Tanhai region and Yangxin hollow in Shengli Petroleum Oil Field,a numerical simulation test was carried out,and the result is basically coincident with the actual conditions. For the model problem,optimal order estimates were derived. Thus the well-known problem on oil resources was solved. | YUAN YiRang1 & HAN YuJi2 1 Institute of Mathematics,Shandong University,Ji’nan 250100,China 2 Physical Exploration Institute of Shengli Petroleum Administration,Dongying 257022,China | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，8： | 10 |
| 10 | Transient expression and antigenic characterization of HBsAg of HBV nt551 A to G mutant显示文摘NTRODUCTIONFromthelate80s,therehavebeenincreasingnumberofreportsonhepatitisB(HB)patientswithatypicalHBVserologicalmarkers,so... | FANG De Xing 1, LI Fa Qing 1, TAN Wei Guo 1, CHEN Hua Biao 1, JIN Hui Ying 1, LI Su Qin 1, LIN Hou Ji 2 and ZHOU Zhen Xian 2 | 1999 | World Journal of Gastroenterology1999，5，1： | 10 |
| 11 | Evolution of chlorite composition in the Paleogene prototype basin of Jiyang Depression, Shandong, China, and its implication for paleogeothermal gradient显示文摘The Dongying Basin, Huimin Basin, and Zhanhua Basin constitute the Jiyang Depression in Shandong Province. They are major oil and gas exploring districts within the depression. Through reconstruc-tions of the paleotemperature of the three basins facilitated with the chlorite geothermometry, the thermal history of the Paleogene prototype basin in Jiyang Depression and its geologic significance were explored. This study reveals that the Si4+ component in chlorites reduces gradually as its buried depth increases, while the AlIV component increases accordingly. The chlorite type changes from sili-con-rich diabantite to silicon-poor ferroamesite and prochlorite. The prochlorite in this district only appears in the deep buried depth, high temperature, and relatively old stratigraphies; while the diaban-tite appears in the shallower buried, low temperature, and newly formed strata; the ferroamesite exists in the conditions between prochlorite and diabantite formation. The diagenetic temperatures of the chlorites in these Paleogene basins are 171―238℃ for the Dongying Basin, 160―202℃ for the Huimin Basin, and 135―180℃ for the Zhanhua Basin. The differences of the chlorite diagenetic temperatures in the three basins were controlled by the duration time of the structural depressing processes. Higher temperature indicates longer depression time. The relationship between the chlorite diagenetic temperature and its buried depth indicates that the average paleogeothermal gradient is about 38.3℃ /km in the Paleogene prototype basin of Jiyang Depression. It was higher than the present geothermal gradient (29―30℃/km). This phenomenon was attributed to the evolution of the structural dynamics in the depression basin. | ZHAO Ming1, CHEN XiaoMing1, JI JunFeng1, ZHANG Zhe1 & ZHANG Yun2 1 State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, China 2 Jiangsu Survey Institute of Engineering and Physics, Nanjing 210008, China | 2007 | Science China Earth Sciences2007，50，11： | 9 |
| 12 | Scaling up the DBSCAN Algorithm for Clustering Large Spatial Databases Based on Sampling Technique显示文摘Clustering, in data mining, is a useful technique for discovering interesting data distributions and patterns in the underlying data, and has many application fields, such as statistical data analysis, pattern recognition, image processing, and etc. We combine sampling technique with DBSCAN algorithm to cluster large spatial databases, and two sampling based DBSCAN (SDBSCAN) algorithms are developed. One algorithm introduces sampling technique inside DBSCAN, and the other uses sampling procedure outside DBSCAN. Experimental results demonstrate that our algorithms are effective and efficient in clustering large scale spatial databases. | Guan Ji hong 1, Zhou Shui geng 2, Bian Fu ling 3, He Yan xiang 1 1. School of Computer, Wuhan University, Wuhan 430072, China 2.State Key Laboratory of Software Engineering, Wuhan University, Wuhan 430072, China 3.College of Remote Sensin | 2001 | Wuhan University Journal of Natural Sciences2001，6，Z1： | 9 |
| 13 | Synthesis of nanostructural ZnO using hydrothermal method for dye-sensitized solar cells显示文摘ZnO nanocrystals with different morphologies were successful synthesized by a simple hydrothermal method combined with and without hexadecyl trimethyl ammonium bromide(CTAB).The phases and morphologies of the products were measured using X-ray diffraction(XRD),scanning electron microscopy(SEM),and transmission electron microscopy(TEM),respectively.The results indicated that the ZnO nanocrystals with different morphologies were of hexagonal wurtzite structure.ZnO nanorods were obtained without using CTAB,and then the morphology of ZnO changed to ZnO nanoflower and the density of nanoflower became denser with the increase of CTAB concentration.ZnO nanoflower and ZnO nanorod as photoanode were applied to dye-sensitized solar cells(DSSC),respectively.The nanoflower shows a higher dye loading,so DSSC with the use of the ZnO nanoflower possesses a higher conversion efficiency than ZnO nanorod. | WANG ChunXiao1,2,ZHANG XiaoDan1,WANG DongFeng1,YANG ZhenHua1,2,JI WeiWei1,ZHANG CunShan2 & ZHAO Ying1 1 Institute of Photo-electronic Thin Film Devices and Technology of Nankai University,Key Laboratory of Photo-electronic Information Science and Technology(Nankai University),Ministry of Education,Tianjin 300071,China 2 College of Information Engineering,Hebei University of Technology,Tianjin 300130,China | 2010 | Science China(Technological Sciences)2010，53，4： | 8 |
| 14 | Analysis of a kind of quantum cryptographic schemes based on secret sharing显示文摘Recently, Yang et al. proposed a kind of quantum cryptographic schemes based on secret sharing. The main idea is drawn from the case, where any n participants who share a secret K can co-operate as K does. This process can be applied to encryption, authentication, signature and so on. Unfortunately, since there is no identity authentication of the share's holder, these schemes inherit the limitation of secret sharing in practice. If some participants do not follow the protocol, the protocol would be a failure at last. Moreover, these schemes encounter another serious attack. Any two participants can co-operate to defeat the schemes by sending different shares to the parties unknown to the distributor of the secret K, such that these parties can execute the protocol as well. The attack proves that it is not enough for quantum cryptographic schemes that only the secret key is secure. | ZHANG XingLan1 & JI DongYao2 1 College of Computer Science and Technology, Beijing University of Technology, Beijing 100124, China 2 State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences, Beijing 100049, China | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，9： | 8 |
| 15 | Polymorphisms of three gene-derived STS on pig chromosome 13q41 are associated with susceptibility to enterotoxigenic Escherichia coli F4ab/ac in pigs显示文摘Neonatal diarrhea caused by enterotoxigenic Escherichia coli(ETEC)F4 is a common and serious disease,resulting in significant economical loss in the pig industry.The locus encoding ETEC F4 receptor has been mapped to pig chromosome(SSC)13q41,and one of the most significantly linked markers is S0075.In this study,we selected three genes including SLC12A8,MYLK and KPNA1 from a chromosomal region flanking S0075 on SSC13 to develop pig specific sequence tagged sites(STS). Seven single nucleotide polymorphisms were identified in the three pig STS using DNA of four full-sib susceptible and resistant animals in a White Duroc×Erhualian intercross.All grandparents,parents and 755 offspring in the intercross were genotyped for three polymorphisms,including SLC12A8 g.159A>G,MYLK g.1673A>G and KPNA1 g.306A>G.Family-based transmission disequilibrium test(TDT) revealed that all polymorphisms and the corresponding haplotypes are significantly associated with ETEC F4ab/ac(especially F4ac)brush border adhesion phenotypes,indicating that these polymor- phism are in linkage disequlibrium with causal mutation(s)of the gene encoding ETEC F4ab/ac receptor. Our results strengthen the evidence for the involvement of SSC13q41 in high acquiring risk of ETEC F4ab/ac infection,and provide novel polymorphic markers for fine mapping of the ETEC F4ab/ac receptor locus. | HUANG Xiang 1 ,REN Jun 1 ,YAN XueMing 1,2 ,PENG QiuLing 1 ,TANG Huan 1 ,ZHANG Bo 1 ,JI HuaYuan 1 , YANG ShuJin1&HUANG LuSheng 1 1Key Laboratory for Animal Biotechnology of Jiangxi Province and the Ministry of Agriculture of China,Jiangxi Agricultural University, Nanchang 330045,China 2Department of Biology,Nanchang University of Science and Technology,Nanchang 330038,China | 2008 | Science China(Life Sciences)2008，51，7： | 8 |
| 16 | A novel ubiquitin carboxyl terminal hydroase is involved in toad oocyte maturation显示文摘p28, a 28kD protein from toad (Bufo bufo gargarizans) oocytes, was identified by using p13suc1-agaroseaffinity chromatography. Sequence homology analysis of the full-length cDNA of p28 (Gene Bank accessionnumber: AF 314091) indicated that it encodes a protein containing 224 amino-acids with about 55% iden-tities and more than 70% positives to human, rat or mouse UCH-L1, and contains homological functionaldomains of UCH family. Anti-p28 monoclonal antibody, on injecting into the oocytes, could inhibit theprogesterone-induced resumption of meiotic division in a dose-dependent manner. The recombinant proteinp28 showed similar SDS/PAGE behaviors to the native one, and promoted ubiquitin ethyl ester hydrolysis,a classical catalytic reaction for ubiquitin carboxyl terminai hydrolases (UCHs). The results in this paperreveal that a novel protein, p28, exists in the toad oocytes, is a UCH L1 homolog, was engaged in theprocess of progesterone-induced oocyte maturation possibly through an involvement in protein turnover anddegradation. | ZHAO GUI SUN1,2,3,*, WEI HUA KONG2,*, YAN JUN ZHANG2, SHAN YAN1, JI NING LU1, ZHENG GU1, FENG LIN1, JIA KE TSO1,**1 National Laboratory of Contraceptives and Devices Research, Shanghai Institute of Planned ParenthoodResearch, Shanghai 200032, China2 Colle | 2002 | Cell Research2002，12，4： | 8 |
| 17 | Thermodynamics calculation on the oxidation and sulfur removal abilities of slag in EAF dust pellet reduction process显示文摘The valuable metals in the dust can be recycled by mixing it with reducing agent carbon and lignosulfonate as the binder to make pellets, then returning the pellets to electric arc furnace (EAF) and adding ferro silicon. Part of valuable metals in the dust is reduced by carbon and part of them reduced by ferro silicon for the economical consideration. The reduced metals get into the steel in the stainless steel or special steel production. But the sulfur in the lignosulfonate may affect the quality of produced steel, which is dependent on the status of the smelting slag. The experiments were conducted in the way of changing the ratio of start iron, pellets, ferro silicon and lime. The content of the slag was checked by XRF for the calculation thermodynamics study. The active concentrations of materials in the slag, the slag abilities of oxidation and sulfur removal in EAF dust reduction process were determined by thermodynamics calculation study on CaO MgO FeO Fe 2O 3 SiO 2 S slag at 1 550 ℃. The oxidation ability of slag can be expressed as N (FetO)= N (FeO)+6 N (Fe 2O 3)+8 N (Fe 3O 4). The sulfur removal ability is dependent on the amount of added ferro silicon and the basicity of the slag. The calculation thermodynamics model was set up and it could be applied to the practical production. | PENG Bing 1,PENG Ji 1,ZHANG Chuan fu 1,Jonathan Lobel 2,Janusz A. Kozinski 2 (1 Department of Metallurgical Science and Engineering, Central South University, Changsha 410083, China 2 Department of Metallurgical Engineering, McGill University | 2001 | Journal of Central South University of Technology2001，8，1： | 6 |
| 18 | Tensile properties and fracture behavior of Ti_2AlNb based alloys at room temperature显示文摘The tensile mechanical properties and fracture behaviors of Ti 22Al 20Nb 7Ta alloys were studied at room temperature. Three typical microstructures of Ti 2AlNb based alloys were obtained by combination of thermal mechanical processing and heat treat ment. They are: 1) lath mixture of O + B 2 with remaining β grain boundaries and α 2 phase; 2) equiaxed O phase in B 2 matrix; 3) fine lath mixture of O + B 2 without remaining β grain boundaries. It is shown that the microstructure obviously affects the tensile properties of Ti 2AlNb based alloys. The microstructure of fine lath mixture of O + B 2 without remaining β grain boundaries has good combination of yield stress and ductility, while the microstructure with lath mixture of O + B 2 with remaining β grain boundaries and α 2 phase has low yield stress and elongation. The fracture mode was also controlled by the microstructure of Ti 2AlNb based alloys. By means of SEM, it was found that the dominated fracture mode of microstructure with lath mixture of O + B 2 with remained β grain boundary and α 2 phase was intergranular, and the fracture mode of the other two microstructures was mainly transgranular. | PENG Ji hua(彭继华) 1, 2 , MAO Yong(毛 勇) 2, LI Shi qiong(李世琼) 2, SUN Xun fang(孙训方) 2 1. Department of Engineering Mechanics, Southwest Jiaotong University, Chengdu 610031, P.R.China 2. Division of Super Alloys, Central Iron and S | 2000 | 中国有色金属学会会刊:英文版2000，10，3： | 6 |
| 19 | Quantitative estimation of the shrub canopy LAI from atmosphere-corrected HJ-1 CCD data in Mu Us Sandland显示文摘The leaf area index(LAI) is an important ecological parameter that characterizes the interface between vegetation canopy and the atmosphere.In addition,it is used by most process-oriented ecosystem models.This paper investigates the potential of HJ-1 CCD data combined with linear spectral unmixing and an inverted geometric-optical model for the retrieval of the shrub LAI in Wushen Banner of Inner Mongolia in the Mu Us Sandland.MODTRAN(Moderate Resolution Atmospheric Radiance and Transmittance Model) was used for atmospheric correction.Shrubland was extracted using the threshold of the normalized difference vegetation index,with which water bodies and farmland were separated,in combination with a vegetation map of the People's Republic of China(1:1000000).Using the geometric-optical model,we derive the per-pixel reflectance as a simple linear combination of two components,namely sunlit background and other.The fraction of sunlit background is related to the shrub LAI.With the support of HJ-1 CCD data,we employ linear spectral unmixing to obtain the fraction of sunlit background in an atmospherically corrected HJ image.In addition,we use the measured shrub canopy structural parameters for shrub communities to invert the geometric-optical model and retrieve the pixel-based shrub LAI.In total,18 sample plots collected in Wushen Banner of Inner Mongolia are used for validation.The results of the shrub LAI show good agreement with R2 of 0.817 and a root-mean-squared error of 0.173. | CHEN Wei1,2,CAO ChunXiang1,HE QiSheng1,2,GUO HuaDong3,ZHANG Hao1,2,LI RenQiang4,ZHENG Sheng1,2,XU Min1,2,GAO MengXu1,2,ZHAO Jian1,2,LI Sha1,NI XiLiang1,2,JIA HuiCong1,JI Wei1,TIAN Rong1,2,LIU Cheng1,2,ZHAO YuXing5 & LI JingLu6 1 State Key Laboratory of Remote Sensing Science,Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University,Beijing 100101,China 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China 3 Center for Earth Observation and Digital Earth,Chinese Academy of Sciences,Beijing 100190,China 4 China Key Laboratory of Ecological Network Observation and Modeling,Institute of Geographical Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China 5 Ordos Forestry Sand Control Science Institute,Dongsheng 017000,China 6 Inner Mongolia Biomass Thermoelectricity Limited Company,Wushen 017300,China | 2010 | Science China Earth Sciences2010，53，S1： | 6 |
| 20 | Morphology and reaction force of toes of geckos freely moving on ceilings and walls显示文摘The 3-dimensional interactions between toes of a gecko and substrates (ceilings or walls) were measured when it moves on ceilings or walls by using a 3-dimensional force measuring array,and the correspondent morphology of the gecko toes was recorded by a high speed camera.The study aims to understand the relationship between adhesive and shear forces generated by the toes of the gecko and the locomotion behavior when it walks on walls and ceilings.Results showed that shear force is along the toe-only 12.6° and 3.1° away from the toe for wall-climbing and ceiling-crawling,respectively while the adhesion is big enough to balance the body weight and moment.The shear forces generated by the first and the fifth toes are in opposite directions;this redundant force increases the reliability of adhesion and stability of locomotion.The support angles of toes are equal approximately for ceiling-crawling and wall-climbing.The study greatly inspires the design of a gecko-like robot. | WANG ZhouYi1,2,GU WenHua1,2,WU Qiang1,2,JI AiHong1 & DAI ZhenDong1 1 Institute of Bio-inspired Structure and Surface Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China 2 College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China | 2010 | Science China(Technological Sciences)2010，53，6： | 6 |
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