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Fused filament fabrication (FFF) 3D printing stands out as a fascinating technique, distinguished by its mold-less and solvent-less process, offering a remarkable approach for producing intricate products with personalized shapes and complex structures [5,12].
Mohanty: Green Chemistry Vol. 22 (2020), p. 3906 [5] W.

The chemistry method includes the chlorining method (or adding bleaching powder), the ozone method, the heavy metal ion method, or other oxidant method and so on.
The main structures include sand basin, reaction basin, sedimentation basin, filtration basin, and clean water basin.

When added in temperatures below 120ºC, the Sasobit strengthens the binder by forming crystalline network structures.
Evotherm is a chemistry package designed to enhance coating, adhesion, and workability of hot mix at lower temperatures[11].

PEG with chemistry structure HO(CH2CH2O)nH is polymerized by epoxy ethane.

X-ray diffraction (XRD) analysis revealed that ZnO films had a polycrystalline hexagonal structure with the predominance of the (101) plane.
Mn2+ ions can easily replace Zn2+ sites without altering the original nature of the ZnO structure because of its radius.
The reason for the different structures may be the before mentioned different growth mechanisms during the deposition of the films.
The structure of the film can be also changed by way for different reasons such as the thickness of the film or post-deposition annealing.
Sharma, Electroless Ni‐P Based Nanocoating Technology—A Review, Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, 36(6) (2006) 493-515. https://doi.org/10.1080/15533170600596030

This pattern confirmed the formation of the BG powder in association with an amorphous structure.
The SEM micrograph images showed the porous structure of the BG scaffold at both 10% and 30%.
The scaffolds appear as porous structures with a smooth surface morphology.
To evaluate the initial BG particles, which had an amorphous structure, XRD patterns were examined.
Our data indicated that the BG nanopowder is associated with an amorphous structure (Figure 5).

Moreover, the storage stability at high temperature, morphology and chemical structure were also analyzed.
Moreover, the storage stability at high temperature, morphology, and chemical structure of the modified asphalts are analyzed.
Journal of Industrial and Engineering Chemistry. 2009, 15(4), pp. 458-464
Materials and Structures. 2003, 36(10), pp. 652-656
Structure and properties of POE modified asphalt, J.

Zhang [15] studied the influence of stray direct current on chloride ion transport mechanism in underground structure concrete.
However, Zhang proposed that a collision effect produced by quick migration of ion caused by electrical field can also change internal structure of concrete.
When the train is running, it will cause stress on the subway concrete structure.
[24] Du Y J, Study on the durability of the subway concrete structure and service life prediction, Hohai University, (2005)
[38] Zhang L J, Zheng Z, Colloid and Interface Chemistry, South China University of Technology Press, (2006).

Similarly, to the shape of the starch granules in both facilities, the starch structure changes after being exposed to 14 Gy in PTS and 35 Gy in BP.
The increase of band intensities at 991 cm-1 and 997 cm-1 by neutron irradiation confirm the decrease in the ordered structure of the treated starches.
The alterations in the starch granular structure were dose-dependent, with a high dosage of energetic and penetrating radiation capable of damaging large starch molecules causing some starch granules to fracture along the cleaved molecules, resulting in the creation of small size granules [20, 21].
O’Mahony, Chemistry, structure, functionality and applications of rice starch, J.
Wang, “Effect of γ-ray irradiation on starch granule structure and physicochemical properties of rice,” Food Res.

Figure 1 illustrates the optimized structure of SiQDs-2D.
SiQDs-2D structure after optimal calculation of atomic position.
(a) Electronic band structure; (b) Density of states (DOS) of SiQDs-2D.
The x, y, and z directions represent the directions of the incident light with respect to the SiQDs-2D structure.
Wang, Graphene quantum dots from chemistry to applications, Mater.