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The structure and properties of the nano-apatite crtstals were investigated.
After n-HA powders were heated at 1000°C, the structure difference was present.
The powders in Fig.2(1) have a poorly crystallized apatite structure, similar to bone apatite.
But they have different composition, crystal structure and morphology.
Studies in Inorganic Chemistry, Amsterdam: Elsevier, 1994, 18, 110 [2] K.S.

There were three structures shown in the picture; primary silicon, gold solid solution metal (Au,Cu,Si), and eutectic structure, which contained with solid solution metal and silicon segregation, while Cu3Si is not found. 100 µm Eutectic Structure (Au,Cu, Si) + Si Primary Silicon Si 16 K/s 25 K/s 44.4 K/s 10 µm c. 10 µm b.
Medium size 0.5 gram ingot had 5.44 %vol Si in primary Si, and 5.88 %vol Si in Eutectic structure.
Primary Silicon Silicon in Eutectic Structure .
Duwez, Metastable phases obtained by rapid quenching from the liquid state, Progress in Solid State Chemistry, Vol. 3 (1967), p. 377-400 [6] J.
Barrett, Structure of Metals, 2nd ed (1952), McGraw-Hill, New York

Interactive virtual lift simulation system mainly focuses on the lift structure, control, network selling, etc.
In this paper, remote operation and control of the lift exterior, structure and functions are realized based on three dimensional virtual scene and network, which include the lift structure, functional control, selling, etc.
For the construction of the parts form and structure such as lift cage, Shaft guide, rail brackets, etc, VRML multimedia nodes are adopted, and the shape nodes are used to construct external effect and geometrical characteristic of the structure.
After a structure is generated, image processing is used to processed picture of the structure.
Computer and Applied Chemistry, 2004, 21 (4),pp. 641–644.

Expanded graphite is characterized by vermicular structure and more developed pore structure where the pore of internal level basically maintains the original layer appearance of natural flake graphite.
These nets planes overlap each other into layer structure, combining with each other by van der waals(VDW) force which is relatively weak.
(2) Expansible graphite has layer structure, which is basically the same as natural flake graphite.
But expanded graphite is characterized by vermicular structure and more developed pore structure
Sansiviero, etal, Preparation processes and properties of expanded graphite for alkaline batteries, Journal of Physics and Chemistry of Solids. 67 (2006) 1208-1212

The contents of the secondary structure were illustrated in Table 1.
The main structure of P1 was regular β-sheet.
The self-assembly structures of the peptide were shown in Fig. 2.
During the process, random coil structure decrease and ordered β-sheet structure increase with time.
Zhao: Science in China Series B: Chemistry 2009, 52(5), 632-638

According to the requirements of sealing a deepwater motor on an underwater device, the overall structure of the magnetic-driven sealer is designed, and its magnetic structure is determined in this paper.
The problem of vibration resulting from uneven stress in radial direction can be avoided by a cylinder type structure, which ensures the movement stability of the structure.The structure of a Magnetic-Driven Sealer (MDS) is shown in Fig 1.
Magnetic circuit design of MDS By using a joined pull-push magnetic circuit as the structure of MDS, the quantity of PM arranged among this style is much greater than the one arranged using gap-separate PM, therefore, a greater transfer torque or a reduced capacity of whole structure can be realized.
For MDS is the movement structure transferring torque, its torque will change a lot in the start procedure, which is quite complicated.
Beijing: Press of chemistry industry, 2009: 32-35 p, in Chinese

Because the microstructure of solids achieved by sol-gel routes can be modified by alternating the chemistry and/or processing conditions, in addition, submicron thin films of uniform thickness can be also directly prepared by using the sol-gel techniques.
Structure variations for different calcined time (15min~4hr) at 900◦C are compared in the Fig. 4.
This diagram shows no decomposition in the existing structure, the structure of the calcined powder remains HA, TCP and CaO, entailing calcined time is less obvious for the structure evolution.
Fig.6 Morphology of as-dried solgel Fig. 7 Apatite structure of HA Fig. 6 shows the SEM images of the as-dried gel precursor.
These apatite granules leave several internal voids that produce the highly porous structure.

With the further increase of silicate loading, an intercalated structure was developed with a constant d-spacing due to the unique structure of hyperbranched polymers.
This may indicate that H40 molecules are easily squeezed and, the strong hydrogen bonding network between H40 and silicate layers makes this distorted structure relatively stable inside the gallery and steric hindrance of H40 molecule itself prevents the further distortion of the structure.
For HSMNs with the exfoliated structure (≤9.1 wt% Na+MMT), Tg increases significantly with the increase of silicate content.
Exfoliated structure was found to mainly exist at lower silicate content, and intercalated structure showed approximately similar interlayer gallery sizes over a wide range of silicate loadings until a fully intercalated nanocomposite was formed.
Manias: Chemistry of Materials, 2943-2949(2000) [3] C.M.

Analysis that the bigger cooling rate can shorten the action time which caused by gravity settling and collisions coagulation of the droplets, and then improves the macrosegregation of solidification structure in favor of uniform distribution of the solidification structure.
Introduction Monotectic alloys with dispersion structure can show the special physical and chemical properties.
Although the decrease of cooling rate can improve the homogeneity of sample temperature field, prolong the common action time of the various influence factors that lead to the liquid-liquid phase segregation during the solidification process of the miscibility gap, and then aggravate macrosegregation of the solidification structure.
By analysis that although improve the homogeneous degree of temperature and the influence of Marangoni convection decrease when the cooling rate is lower, but prolong the action time of the gravity settling and collision ripening, which is the main cause of intensified macrosegregation of solidification structure.
Therefore, the faster cooling rate can increase the droplets density of L2phase and improve the influence of gravity on macrosegregation of solidification structure.

The fine grain structure can significantly improve the mechanical properties of the steel, but to some extent, reduce its corrosion resistance.
In the early and later stage of the corrosion reaction, the coarse grain structure can improve the corrosion resistance.
There were many researches on the anti-corrosion of still pipe piles at home and abroad, the main measures were the surface chemistry coating, metal thermal spraying, cold spraying and cathodic protection, etc [1, 4].
Compared to the coarse grain structure, the grain boundary area of the fine grain structure was much larger; therefore its activity of the substrate surface was higher, and its substrate was easier to erode.
However, in the middle stage of the corrosion reaction, the corrosion rates of the steels with coarse grain structure and fine grain structure were gradually to converge.