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In contrast to externally administered nanodevices, such structures are dynamically produced and degraded.
They acquire their structure by intramolecular folding and hence are not limited by intracellular diffusion processes.
Such structures may be used as artificial cell-like compartments (cf.
DNA-switchable supramolecular structures and materials might be useful for controlled release applications.
Bruck: Journal of Physical Chemistry A Vol. 104 (2000), pp. 1876-1889

China; 3Teaching and Research Center of Chemistry, Jilin University, Changchun 130022 a jiangman@jlu.edu.cn.
Introduction Shell is a kind of natural layered composite material, its excellent performance is mainly decided by the hierarchical structure and organic matter of the shells, therefore the theory that the hierarchical structure of shell can enhance mechanical properties became the main theory of enhancing the composite materials’ performance.
In this paper, we do further research on deformation characteristics and bond strength of the clam shell based on optimizing excellent mechanical properties in micro-structure of the clam shell.
Bond strength This research took the quantitative analysis of the bond strength between the layered structure of clam shell by scratch method, place a radius of 10μm diamond conical tip needle perpendicular to the surface of the clam layered structure, exert a certain nomal force and rit along the coating surface with the needle, then measure the bond strength between the layers by scratching the layered structure.
On the mechanics of mother-of-pearl: A key feature in the material hierarchical structure[J].

., Shandong University, Jinan, 250061, China 2 College of Chemistry & Chemical Eng., Shandong University, Jinan, 250100, China Keywords: High-speed milling, Dynamic model, Centrifugal force, Gyroscopic effect Abstract.
= . (11) Because G is dissymmetric matrix, solving the G of the lager-scale and complex engineering structures is very difficult in general, the eigenvalue problem of vibration equation such as Eq.10 is called the gyroscopic eigenvalue problem.
To solving the Eq.10, based on the rotating symmetry possessed by most of high-speed rotating structures, the group representation theory is applied to the gyroscopic eigenvalue problem and the whole structure can be divided into much smaller subproblems in n irreducible subspaces SJ (J=0, 1, 2, …, n), resulting in reducing of calculation work and time greatly.
The vibration equation of high-speed rotating symmetric structure is derived and their gyroscopic eigenvalue problem can be solved by the group theory, resulting in analyzing of dynamic characteristics of structure numerically and reducing of calculation work greatly.
To bring the dynamic model even closer to reality, the following issues should be addressed in future work: 1) Effect of centrifugal force and gyroscopic effect on dynamic characteristics of system under the different supporting stiffness of bearing structure. 2) Effect of the centrifugal force and gyroscopic effect on dynamic characteristics of system under the different workpiece and clamping structure.

That is possible by decrease of the volume and size of open pores in its structure.
To evaluate EIS data, an equivalent circuit is necessary to substitute the real material structure.
Fig. 1 (A) Simplified representation of a concrete structure; (B) analogous equivalent circuit model for concrete from simplified concrete structure A theoretical Nyquist spectrum based on the equivalent circuit mentioned above shows two capacitive loops (see Fig. 2.) [8].
Conclusion We confirmed that EIS can be used for the characterization of the concrete structure and its permeability.
In this article has been confirmed, that the open-pore volume structure of UHPC considerly smaller than open-pore volume structure of OPC.

Introduction Comb-shaped polymer is a new-generation structure of polycarboxylic acid water reducer (PC) developed by Europe, Japan, the U.S and other countries since 1980s, characterized by comb-shaped graft and long-chain structure.
Finally, polycarboxylic acid ultra-high performance water reducer TPC was obtained, whose structure diagram is as shown in Figure 1.
Fig.1 The structure diagram of TPC Fig. 1 is a structure diagram of TPC.
TPC has a typical structure of comb-shaped polycarboxylic acid.
Its structure is simple, with carboxylic acid structure units providing anchoring points and long side-chain creating steric hindrance effect, thus producing ultra high water-reducing performance.

XRD results showed that the structure of the coatings prepared by at 0.1 M main salt with a heat treatment at 400 °C for 1 h had Cr7C3 and Cr23C6 phases appeared as well as the hardness of that enhanced up to 1350 Hv than 880 Hv of the as-deposited coatings.
Morphology and structure analysis Fig. 1 and Fig. 2 showed the surface morphology and thickness of coatings with different concertration of main salt, respectively.
It can be attributed to the phase change of coating structure after heat treatment.
It indicated that the phase structure of Cr-C alloy changes from amorphous/microcrystalline to crystalline phase when annealed.
Kozhevnikov: Electrochemical-Corrosion Properties and Electronic Structure of Chromium Carbides, Nitride, and Carbonitride, Protection of Metals (English translation of Zaschita Metallov), Vol. 26(1991), p. 568-573

After solution heat treatment the alloy has the structure of twinned austenite with a small amount of undissolved precipitates, such as carbide TiC, carbonitride TiC0.3N0.7, nitride TiN0.3, carbosulfide Ti4C2S2, Laves phase Ni2Si, and boride MoB.
Results and discusion After solution heat treatment at 980°C/2 h/water the investigated Fe-Ni superalloy has the structure of twinned austenite with an elevated density of dislocations and a small amount (ca. 0.3 wt. %) undissolved precipitates (Figs. 1, 2).
The first signs of overageing were detected in the alloy structure after ageing for 100 to 300 h – colonies of transcrystalline Widmanstätten lamellae of phase η (Ni3Ti), which grow into an austenite grain in the <111> direction, are formed (Fig. 8).
Kuc, Analysis of precipitation process of the intermetallic phases in a high-temperature Fe-Ni austenitic alloy, Materials Chemistry and Physics 81 (2003) 490-492
Nicholson, An electron microscope investigation of the interfacial structure of semi-coherent precipitates, Proc. 5th International Congress for Electron Microscopy, Ed.

Plastics are poor conductors of heat due to the electronic structure of the macromolecules of which they are made off.
It was reported that the amorphous structure of PC was transformed into a different metastable amorphous structure under the influence of tetrahydrofuran (THF) as a polar solvent.
The metastable amorphous structure retained on the nanoparticles has a new Tg which was lower than the normal Tg and these types of structures have been crystallized by a short annealing treatment at 120°C during 24 hours.
Saibel, Tempering stresses in an infinite glass plate, Glass Physics and Chemistry. 2 (1961) 137-140. [12] E.
Meares, Polymers: Structure and BuIk Properties., Van Nostrand Reinhold Company, London, 1971. [32] B.

The results of the tests selected and validated the composite structure.
Turku, Characterization of wood plastic composites manufactured from recycled plastic blends, Composite Structures, 161 (2017) 469-476
Timerbaev, Pyrolyzates: Products of plant biomass fast pyrolysis, Russian Journal of Applied Chemistry 87 (2014)1367-1370
Maher, Palm leave and plastic waste wood composite for out-door structures, Construction and Building Materials, 47 (2013) 1431-1435

Then, the modeling structure, algorithm, optimization, test and experiment of low-temperature fuel cells were particularly presented applied the electrical characteristics equation.
Schematic diagram of PEMFC structure and principle The PEMFC working principle is shown in Fig.1.
Its goal is to optimize PEMFC structure and test PEMFC performance [5].
As known by the chemical thermodynamics, in the system composed of number i materials, the chemistry potential of the ith material has the following relation with the Gibbs free energy of the system.