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Online since: July 2012
Authors: Liang Fan, Qi Xia Liu
Adverse form of the loess slopes are often produce tensile stress in the peak of the slope,and arouse tension crack in the top of the slope. engender strong shearing strength in toe of the slope,come up line of shear disturbance,this effect has maximum reduce the stability of the slope.The adverse combination of the slope surface and soil structure surface(joint)will lead to control type instability of the slope structure surface. 3) Stratum structure Loess-like soil and loess, soil evenly, contain fragmentary calcium nodules,geological conditions are singleness,and take on loose state.
(5)The chemistry of the groundwater The groundwater can change the surrounding geotechnical by chemistry, Constantly changing nature and intensity of the surrounding geotechnical,which caused the Loess slope instability.
Therefore, the additional stress of the earthquake effect,have much impact on the stability of the slope . 4)The factor of human Human engineering, economic activity is the important factor on triggered loess slope instability .According to the survey,there are 80% of the loess slope failure in Guanzhong area caused by human activity.Human engineering, economic activities, including irrigation, and road construction, building materials digging and living and filling with soil, spoil, building loads and so on. Ⅴ The Investigate on the Mechanism of loess slope instability A Changes in soil structure and soil structure model Loess structure and sequence structure clearly with a level of sequence.The structure of the loess loosely,Pore Development,Vertical joints;particle separation well,the main contact with cement;loess is a kind of soil that mainly Composition by Smectite,, kaolinite clay mineral,with good hydration soften,A significant reduction in shear strength of the hydration
The general structure is in north-south direction.
The platform (after the artificial backfilling) elevation is from 99.53m to 100.31m. 2) Lithology According to exploration results, the stratigraphic structure is relatively single.
Online since: May 2004
Authors: V. Dondur, Vesna Rakić, S. Gajinov, A. Auroux
Auroux 4 1Faculty of Agriculture, Zemun, Serbia and Montenegro 2 Faculty of Physical Chemistry, Beograd, Serbia and Montenegro 3 Institute of General and Physical Chemistry, Beograd, Serbia and Montenegro 4Institut de Recherches sur la Catalyse, Villeurbanne, France Keywords: Adsorption, CO, Differential Heats, N2O, ZSM-5 ABSTRACT Cu(II)-ZSM-5 samples were prepared with different copper loadings from under- to overexchanged levels.
The adsorbed amounts of both gases and differential heats of adsorption depended on the copper content in the zeolitic structure.
These features are strongly dependent on the amount of water molecules and OH groups present in the structure.
The structure of ZSM-5 zeolite was confirmed by XRD technique.
This result indicates a complete dehydration of investigated structure after pre-treatment in vacuum, at 400°C.
Online since: June 2010
Authors: Ji You Gu, Yan Hua Zhang, Ying Feng Zuo, Hai Yan Tan, Li Bin Zhu, Bo Han
X-ray photoelectron spectroscopy (XPS) had been used to analyze the chemical structure of bonding interface.
XPS Analyze the Chemical Structure of Bonding Interface.
The interface chemical structures of plywood with bonding joint with the optimum ratio were analyzed, and the results were shown in Table 2 and Figure 4.
Chemistry and technology Marcel Dekker Inc.
Chemistry Online. 2004, p.67
Online since: June 2013
Authors: Supakorn Pukird, Suttinart Noothongkaew, Worasak Sukkabot, Bualoy Kasemporn, Prayoon Songsiririttikul, Ki Seok An
The surface morphologies transformed from sparse to a more dense structure.
All peaks are corresponding to the hexagonal structure of Zn [14].
All peaks are equivalent to the hexagonal ZnO with wurtzite structure.
The structure and size of ZnO nano-whiskers strongly depend on the oxidizing temperature.
Pan., Materials Chemistry and Physics. 115 (2009) 74-79
Online since: January 2017
Authors: Jin Hua Zhang, Chang Ming Ke, Hong Dan Wu, Ji Shun Yu
The crystal structure of hexagonal cordierite.
The crystal structure of hexagonal cordierite can be described as the layer structure parallel to ab plane.
Wenk, Structure variation in low cordierites, Am.
McConville, Structural chemistry of synthetic cordierite: evidence for solid solutions and disordered compositional domains in Bi-flux-grown Mg-cordierites, Phys.
Stadord, High-temperature crystal chemistry of hydrous Mg-and Fe-cordierites, Am.
Online since: May 2023
Authors: Hui Lin Ong, Yra Marielle M. Jumadiao, Mary Donnabelle L. Balela, Marvin U. Herrera, Ronniel D. Manalo
Results showed that nanocellulose extracted from matured coconut husk has 2.26% yield with agglomerated, rod-shaped structures.
It provides enhanced properties including increased mechanical strength, thermal stability and surface chemistry [3].
Figure 5 shows the AFM image of the produced nanocellulose showing agglomerated, and rod-shaped structures.
AFM results showed that nanocellulose extracted from matured coconut husk have agglomerated, rod-shaped structures with a calculated 2.26% yield.
Hamidon: Frontiers in Chemistry Vol. 8 (2020), p. 392
Online since: December 2012
Authors: Wei Rao, Ding Guo Li, Hong Chun Yan
The individual layer thickness strongly affected the structure, ferroelectricity, and dielectric properties of the films.
However, columnar-structured ferroelectric BST thin films have not been reported to date to our knowledge.
It has been demonstrated that the film microstructure can be affected by the nature of the substrates, the solution precursor chemistry, and the heat-treatment approach utilized[8,9].
The structure of the film derived from a 0.4M solution could be described as cubic structure, because the degree of splitting of (200) reflections was greatly reduced.
Payzant, Structure–Property Relations in Mesoscopic BaTiO3 and PbTiO3, Ferroelectrics, 223(2009)11–18
Online since: March 2014
Authors: Jin Gou Ji, Ting Lu, Yuan Yuan Chen
Preparation of a super-hydrophobic and self-cleaning coating for an anti-icing transmission line Chen Yuanyuan1, Ji Jingou1,a, Lu Ting2 College of Chemistry and Engineering, Chongqing University, China The Environmental Protection Agency of Banan district of Chongqing, China aemail: 725_tiger@sina.com Keywords: super-hydrophobic; contact angle; photocatalytic activity; anti-icing Abstract.
The surface of the coating possesses a natural lotus-like micro- and nano-hierarchical structure.
Such special micro-nano-binary structure increasesd the surface roughness dramatically and air trapped in the grooves underneath the liquid largely minimizes the contact area between the coating surface and the water.
The polymers could not stretch well in poor solvent, so the kinkled fluoropolyacrylate pieces contract and accumulate to form the rough structure during drying.
Online since: February 2007
Authors: F.J. Monteiro, M.P. Ferraz, S. Teixeira, H.M. Fernandes, J. de Boer
Mesenchymal stem cell proliferation and morphological analysis on interconnected macroporous structures S.
Roberto Frias, 4200-465, Porto, Portugal 3 PBM-Polymer Chemistry and Biomaterials, Institute for Biomedical Technology, Twente University, Prof.
Also, a 3D interconnected porous structure is desirable to allow cell attachment, proliferation, differentiation and to provide pathways for proteins and nutrients.
Results and Discussion SEM observations demonstrated that the replication of the foam was successful and that it was possible to obtain interconnected porous structures (figure 1).
Conclusions In this work, macroporous interconnected structures were obtained using the polymer replication method.
Online since: June 2013
Authors: Zi Lu Wang, Xue Hao He, Bo Du
Understanding how nanoparticles self-assemble into specific structures is important in biology.
The self-assembly structures of disc-shaped nanoparticles are investigated using Gay Berne potential.
Introduction Nanoparticles with different shapes can self-assemble into specific structures and these structures are of great interest in a wide variety of fields from materials science to biology and material fields.
This class of linear liquid crystal may have more complex phase structures and transitions.
Summary The phase structures of a simplified disc-shaped supramolecule model are systematically studied with simulated annealing MC simulation.