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Palkar et al.[7] found that, below 25 nm, Cu2O in a cubic crystal structure is stable.
Ram et al. [8] have prepared stable Cu2O nanocrystals in a new orthorhombic crystal structure with 10-30 nm.
But sample 3 in a cubic crystal structure with about 700 nm can stably exist in air.
Zhao: Journal of Solid State Chemistry Vol. 184 (2011), p. 2097
Chu: Journal of Solid State Chemistry Vol.184 (2011), p.1638

Long-term Safety Analysis of Tunnel Structure Based on the Performing Degree of Support Strength LAI Jin-xinga, LIU Xiao-weib, ZHOU Feib School of highway, Chang’an University, Xi’an,710064,China alaijinxing8059@163.com, b86128875@163.com Keywords: tunnel engineering;performing degree of support strength;safety analysis;load structure model.
Principle of load structure model The design principle of load structure considers that the main function of stratum after tunnel excavation is provide load for lining structure which should withstand the load functions such stratum pressure safely and reliably.
The stratum pressure should be determined firstly by stratigraphic classification or practical formula in calculation, and then the lining internal force is calculated according to the calculation method of structures on elastic foundation and the structure section design is progressed [1,2].
The loose surrounding rock pressure acting on tunnel lining structure [3] is calculated according to 1, and other calculation parameters are shown in Tab.1
Using short- and long-term transients in seepage discharge and chemistry in a mountain tunnel to quantify fracture and matrix water fluxes[J],Journal of Hydrology,2000, 23(4) : pp142-161 [2] ZHOU Dingheng,CAO Liqiao,MA Yongfeng,RESEARCH ON CONSTRUCTION BEHAVIORS OF SUPPORT SYSTEM INFOUR-LANE ULTRA LARGE-SPAN TUNNEL WITH SUPER-LARGECROSS-SECTION, Chinese Journal of Rock Mechanics and Engineering [J],2010,29(1):pp140-148 [3] The Professional Standards Compilation Group of China.

Introduction Green chemistry is gaining more attention as manufacturers are looking forward to reduce or eliminate the use of hazardous petroleum-based substances which have bad effects on human health and the environment.
If compare to ATR-FTIR Spectra of thiols (1,2-Ethanedithiol), the Absorption peak of C-S functional group in ATR-FTIR Spectra of thiols (1,2-Ethanedithiol) was shifted from 693.27 to 704.96 cm-1 in ATR-FTIR spectra of t-AEPOU confirming the increment in cross-linked structure in Thiolated AEPO Urethane [6].
Du Prez, Thiol-ene chemistry for polymer coatings and surface modification - building in sustainability and performance, Mater.
Yagci, Influence of type of initiation on thiol-ene ‘click chemistry’, Macromolecular Chemistry and Physics, 211(1). (2010) 103-110
Mandal, Physicochemical studies on polyurethane/siloxane cross-linked films for hydrophobic surfaces by the sol-gel process: submitted to Journal of Physical Chemistry B. 117(9). (2013) 2682-2694

Due to the adsorptive decoloration only adsorption of dye, but without damaging its structure features, usually there are shortcomings without enough adsorption capacity.
Chemistry and Industry of Forest Products, 2009.29(6):p. 98-104
Chemistry adn Industry of Forest Products, 1999.19(3): p. 88-90
[12] Faria P C C,Crfao J J M, Pereira M F R, Adsorption of anionic and cationic dyes on activated carbons with different surface chemistries [J].
Environmental Chemistry, 2005,24(4): p.401-403

. *** (2004) pp.663-667 online at http://scientific.net  2004 Trans Tech Publications, Switzerland Structure Dynamic Modification and Optimization for High-Speed Face Milling Cutter W.X.
P.R.China, 100080 3 School of Chemistry & Chemical Eng., Shandong University, 27 Shanda South Rd, Jinan, P.R.China, 250100 a tangwx@sdu.edu.cn, b aixing@sdu.edu.cn, cwhyyyl@163.com, d zhangsong_sdu@sina.com.cn, e aresjh@sina.com.cn Keywords: High-speed face milling cutter, Dynamic optimization, Structure dynamic modification, Natural frequency Abstract.
It should be noted that the computation of the modified natural frequencies and modeshapes through (8) does not require the knowledge of M, K and C of original structure.
The calculated results show that the change of modeshapes of the same structure is unobvious as different u(xi).
The change of modeshapes of the same structure is unobvious as different u(x).

His early work involved positronium chemistry/physics investigating topics including chemical reactions of positronium in aqueous solutions (Phys.
In parallel, he applied positron annihilation to the studies of electronic structure in crystalline solids.
In his later years, John went back to positronium in matter, applying this probe in the studies of physical properties of polymers in relation to the behaviour of the so called “free volumes”, an issue of longstanding importance in the physics and chemistry of polymers.

Preparation and Applications of the Expandable Graphite Catalyst with Hierarchically Porous Structure in the Aldol Condensation WU Xueyan1,a, YAO Kai 1,2,b, AN Zhentao 1,c, LI Jihui3,d 1The Third Department, Ordnance Engineering College, Shijiazhuang 050003 2 Academy of Equipment, Company of Postgraduate Management, Beijing 101416 3College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050016 axueyanchem@163.com, bhuofo_519@sohu.com, canzhen@126.com, djhui@126.com Keywords: the expandable graphite, hierarchically porous, expanded volume, pore diameter, 2-Ethylhexenal Abstract The expandable graphite catalyst with hierarchically porous structure was prepared by chemical oxidation.
The results indicated that the expandable graphite is hierarchically porous structure catalyst.
The micelles also present more disordered structure in its internal part.
And the third-level pore structures in numerous meshes form are presented in the interlayer.
Ma, Synthesis of 3,3,6,6-Tetramethy1-9-aryl-1,2,3,4,5,6, 7, 8-octahydro-xanthene-1, 8-dione Catalyzed by Expansible Graphite, Chinese Journal of Organic Chemistry. 27(2007) 1147-1149

The functionalized core-shell MOFs maintained their crystal structure, morphology, and enhanced UV-vis absorbance.
TEM, EDX, XRD, UV Crystal structure analysis.
XRD was measured to examine the crystal structure of the synthesized materials.
The composite preserved its morphology and crystal structure.
Verpoort, “Metals@ZIFs: Catalytic applications and size-selective catalysis,” Coordination Chemistry Reviews, vol. 353.

The molar ratio influences structure and performance of hydrotalcite largely.
We can get ideal structure of Co/Cr LDHs when the pH is 8±0.2[13].
Industrial and Engineering Chemistry Research, Vol.34 (1995), p.1196-1202
Chinese journal of inorganic chemistry (English version), Vol.16(2000), p. 43-46
Journal of inorganic chemistry, Vol. 19(2003), P.485-490.

As the molds were used to transfer the relief structures, the effect of various processing parameters on the morphology was investigated to obtain the non-cracked, well-defined ceramic pattern structures.
Generally, it has been known that the degree of curing at the polymeric stages depended on the chemistry of polymeric precursors and the curing conditions such as types of additives, temperatures, etc. [8, 9].
As shown in Fig. 4, it is obvious that the both cured and pyrolyzed ceramic patterns successfully make non-cracked structures as expected.
In addition, the slight delamination along the edge of pattern was occasionally occurred when removed the molds, indicating that controlling the interface chemistry between mold and pattern materials is an important issue in this lithography.
It is convinced that the well-developed structures of 1µm wide and 230nm thick are an exact replica of CD relief structure.