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Introduction Liquid gallium normally solidifies at 30oC and 1 atm into α-gallium, which has a complex, orthorhombic crystal structure.
In any case, x-ray analysis showed only the FeGa3 structure.
FeGa3 is a line compound that has the tetragonal structure shown in Fig. 1 [[] Ulrich Häussermann et al., J.
Solid State Chemistry 165 (2002) pp. 94-99. ].
Fig. 1 Crystal structure of FeGa3 [15].

For this purpose, organically modification of coating structure is one of the means to improve the anticorrosion property of the coatings [7].
The structure of the investigated powder was analyzed by Fourier transform infrared spectroscopy (FT-IR，NEXUS-670) with KBr pressed disc technique.
A cross-linked-structure was formed on the surface of AA2024 substrates.
Scherer, Sol-Gel Science: the Physics and Chemistry of Sol-Gel Processing, Academic Press, San Diego, CA, 1990
Yang, PEG-directed Hydrothermal Synthesis of Multilayered Alumina Microfibers with Mesoporous Structures, Microporous Mesoporous Mater. 123 (2009) 39-44

Experimental results and discussion The carbide distribution is clearly defined by SEM analysis, but the morphology, type, chemistry and size of the precipitates are difficult to determine.
The initial microstructure consisted of a ferrite matrix and pearlitic structure, without either matrix or grain boundary precipitation (stage A).
After 500 h of testing, degeneration of the pearlitic structure was observed with few precipitates in the grain boundary and the matrix.
Microstructure Stage Creep life fraction Ferrite matrix and pearlitic structure without precipitation in the matrix and in the grain boundary A Interval: 0 h ® 500 h Life fraction t/tr: 0 ~ 0,15 Rupture time tr » 3210 h Pearlitic structure degeneration with few precipitates in the matrix and grain boundary.
Microstructure Stage Creep life fraction Ferrite matrix and pearlitic structure with elongated M3C and filamentary carbides A Interval: 0 h ® 500 h Life fraction t/tr: 0 ~ 0,15 Rupture time tr » 3210 h Carbide coarsening within plus the grains and filamentary carbides B interval: 500 h ® 1000 h life fraction t/tr: 0,15 ~ 0,31 Sphreroidisation is predominant and increasing of carbide filamentary C Interval: 1000 h ® 1500 h Life fraction t/tr: 0,31 ~ 0,47 precipitate-free zones formation, filamentary carbides reduction D Interval 1500 h ® 2000 h Life fraction t/tr: 0,47 ~ 0,62 clusters formation and filamentary carbides reduction E Interval: 2000 h ® 3000 h Life fraction t/tr: 0,62 ~ 0,93 Sphreroidisation is predominant and M6C is the predominant carbide, pearlitic structure degeneration F Interval: 3000 h ® 3217 h (Rupture) Life fraction t/tr: 0,93 ~ 1,00 Figure 4.

Hydroxylated Natural Rubber Effect on Crystallinity and Mechanical Properties of PLA Nutthapong Triampanichkul1,a* and Ploenpit Boochathum1,b 1Department of Chemistry, Faculty of Science, King Mongkut’s University of Technology Thonburi, Thungkru, Bangkok, 10140 Thailand aemail: Nvtthapong2999@gmail.com, bemail: ploenpit.boo@kmutt.ac.th *corresponding author Keywords: Hydroxylated natural rubber (HNR), Poly(lactic acid) (PLA), Crystallinity, Ozonolysis reaction, Compatibility.
Molecular structure and type of functional groups of HNR were confirmed by using 1H-NMR technique.
Molecular structure characterization The molecular structure was indicated by Fourier Transform Nuclear Magnetic Resonance Spectroscopy Technique (1H-NMR) (Bruker, model avance III HD) at 500 MHz.
Molecular weight and molecular weight distribution of NR and ONR4 Sample w (g/mol) n (g/mol) MWD NR 6.37 x 105 3.76 x 105 1.69 ONR4 5.06 x 103 3.94 x 103 1.28 Molecular structure characterization of HNR and HNR4 From the 1H-NMR spectra (Fig. 1), the molecular structures of HNR and HNR4 were analyzed.
Lei, Influence of melt-draw ratio on the crystalline behavior of a polylactic acid cast film with a chi structure, RSC Adv. 7 (2017) 39914-39921

Table 1: Chemistry and mechanical properties of samples extracted from real components.
As shown in Fig. 1, the as-quenched structures consist of an α’ martensite matrix, in which fine and highly dislocated laths are distributed parallel to one another.
The comparison of tempered structures after industrial double tempering treatment is proposed in Fig. 2.
Precipitation of M23C6 carbides takes place inside the austenite phase or at the austenite-martensite interfaces in both structures, see Fig. 3a.
This occurrence has two main consequences: a) an acceleration of the structural recovery of the martensitic matrix, because of a more extended redistribution of alloying elements within the structure.

The porous clay ceramics with foam like structure can be used as: filters, thermal insulation, lightweight structural laminates, diffused aeration, dust collectors, and acoustic absorbers, just to name a few.
During the firing the ash acts as a flux and contributes to the consolidation of the ceramic structure.
Guzman, “Certain principles of formation of porous ceramic structures.
Pattabhi, “Utilization of sago waste as an adsorbent for the removal of Cu (II) ion from aqueous soulution”, E-journal of Chemistry, vol. 5, no. 2, pp. 233 – 242, 2008
Idehara, “Fabrication of unglazed ceramic tile using dense structured sago waste and clay composite”, Indonesian Journal of Material Science, vol. 11, no. 2, pp. 79 -82, 2010

The porous structure of RH also increases water sorption.
Lignocellulosic structure experienced swelling and the bond between the components had loosen up after the treatment.
The presence of amorphous structure in silica gives good water resistance to the husk [16].
Pretreatment weaken the lignocellulosic structure and with further treatment, RH experiences structural changes.
Methods of wood chemistry 1967: 394-396

Surface properties can be changed either by changing the surface chemistry, by creating physical structures on the existing surface, or by combining these methods in various combinations [21].
Fig. 3: The absorption spectra of CuNPs Fig. 4 represents the pattern of XRD of the CuNPs prepared via PLAL of a Cu plate target and shows the crystal structure and the peaks of Cu and CuONPs.
Found multiple structures of NPs with various peak intensities of the selected sample.
The fabricated NPs have a polycrystalline structure, they have crystal levels belonging to CuNPs and the others to CuOxNps in different phases.
Jun, One-step fabrication of superhydrophobic hierarchical structures by femtosecond laser ablation, Applied Surface Science, 313 (2014) 411-417

Creating a corrugated structure can reduce the impact on strain of this metal layer, or even lead to an enhancement in strain [16].
Incorporation of carbon nanotubes into the polymer structure has also been used to both increase conductivity and stress [5].
Resonant Structures.
De Rossi, Proceedings of the SPIE, Smart Structures and Materials, 3987, (2000), p. 273 [7] C.
Madden, Journal of Electroanalytical Chemistry, 590, (2006), p. 76 [12] J.

Figure 2 shows the structure of the molecules of Bis-GMA, TEGDMA and UDMA.
Its disadvantages: not present favorable aesthetic properties, adhesiveness has no tooth structure and have mercury in their composition (ANUSAVICE, 2005).
These materials exhibit unique properties that include: ability to ion exchange with the tooth surface, release fluoride for a lifetime membership to the restoration and maintenance of tooth structure with marginal sealing for long periods.
Residues of methacrylate monomers can be incorporated into the lipid bilayer of the cell membrane leads to solubilization of odontoblasts this structure and consequent irreversible cell damage.
Nicholson: The chemistry of medical and dental materials.