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Moreover, the structures of γ-tocotrienol and its dimers were found to be affected by the strong alkali condition of saponification (data not shown).
This natural polymer is susceptible to oxidative degradation due to the high amount of double bonds in its structure.
Moreover HP-TLC method can be applied for the NR lipid extract without any pre-treatment, which reduces the experimental time and avoid the possible structure modification of compounds during sample treatment.
The chemical structure of these derivatives from γ-tocotrienol and samples presented at the same Rf were characterized by HPLC-MS-APCI positive mode.
Appelqvist, The chemistry and antioxidant properties of tocopherols and tocotrienols, Lipids 31 (1996) 671-701

Structure of GO-PMMA solid was characterized by FTIR and optical microscope.
Ding [7] has proposed to use graphene oxide membrane - being a layer structure in a fixed bed sand column - to filter out heavy metal ions, such as copper and lead.
The increase in weight may have been due to the solid trapping some solution inside its structure.
Chen, Graphene Chemistry: Theoretical Perspectives, WILEY, 2013
Chhowalla, "Atomic and Electronic Structure of Graphene-Oxide," Nano Lett., vol. 9, no. 3, pp. 1058-1063, 2009

The crystal structure of the AZO nanorods were identified by using grazing-incident X-ray diffraction (GIXRD).
To enhance the performance for n-type, the trivalent and tetravalent ions such as In3+[3], Al3+, Ga3+[4], and Ti4+[5], which can contribute excessed electron than zinc ions in crystal structure to increase the conductivity.
Although recent works have mentioned that the surplus Al3+ can cause the production of nanosheets structure, the comprehensive discussion and the boundary condition of the Al3+ influencing the morphology are not revealed.
In Fig. 2, shows the XRD patterns for the crystal structure of the nanorods which were obtained from the baths of ZnO electroplated electrolyte containing 20, 60, 80 and 100 μM aluminum nitrate.
Journal of Materials Chemistry C 2013, 1 (18), 3138-3149

The structure of wedge bulk sample was evaluated by a combination of X-Ray Diffraction (XRD) and Differential Scanning Calorimetry (DSC).
The thermal stability of BMGs materials is an important factor related to crystallization, which consists of the transition from disordered amorphous structure to ordered crystal structure.
However, at temperature de 450 and 500 oC, appears the first diffracted peak in remaining amorphous structure.
That peak increases in intensity until the temperature of 550oC where the amorphous structure disappears.
Kissinger: Analytical Chemistry Vol. 29 (1957), p. 1702

Organic-inorganic composite materials have been extensively studied for a long time in chemistry engineering [12].
The core structure is nanosilica, the shell is PCE.
This due to shell structure improves repulsive force between nanoparticles.
Materials and structures. 2013, 46(6): 881-898
The effect of superplasticizers' chemical structure on their efficiency in cement pastes[J].

Such values have been used to replicate the electronic structure of magnetite [11],[12],[13],[14].
Relaxed inverse spinel structure of Ni:Fe3O4.
Journal of Materials Chemistry C, 12(47), pp.19212-19218
High-performance thermoelectric oxides based on spinel structure.
BoltzTraP2, a program for interpolating band structures and calculating semi-classical transport coefficients.

Finally, the best structure of TiO2 was added into the PMMA to investigate the effects of TiO2 on the composite surface morphology.
The small aggregates of the particles were observed due to the weaker bonded aggregates structure.
The surface morphology of TiO2 nanopowder milled at 1 hr shows the particle has long rice-shape like structure with particle size ~11–21 nm.
Some of the particle is in spherical shape, and some are rod-shape like structure.
Falaras, "Preparation, characterization and photocatalytic activity of nanocrystalline thin film TiO2 catalysts towards 3,5-dichlorophenol degradation," Photochemistry and Photobiology A: Chemistry, vol. 149, pp. 237-245, 2002

A filler with an optimal pore structure will represent a hollow sphere.
Ash microspheres of Novocherkasskaya state district power station: 1 - shell structure; 2 - the form; 3 - surface structure Table 1.
A study of the resulting concrete structure showed that the typical structure of such concrete takes an intermediate place between the structures’ characteristic of cellular and lightweight concrete on porous aggregates, while possessing the positive properties of both types of structures.
So, in air-dry conditions, the increase in the concrete strength with a dense structure slows down after 2 - 3 months, and for the concrete with a loose structure it stops after 1 - 2 months.
Rylov, Aluminosilicate microspheres of ashes of pulverized coal burning, Chemistry of solid fuels. 6 (1987) 122-126

The presence of silica makes the layers of the membrane structure denser and reduces the methanol cross-over effect.
And after leaching with 2% HCl in Figure 1 (b), the particle size appears smaller, namely 247 µm, more compact than Figure 1 (a) and the structure is amorphous.
This phenomenon was confirmed by previous researchers [9] who reported that POFA is characterized by its rubbery and porous structure and its main components are irregular in shape with a fairly large fraction.
The chemical structure image for chitosan is shown in Figure 2.
Chemical structure of chitosan Fig. 3.

During the process, Cu2+ ions were exchanged with the zeolite structure.
Zeolite persists its cubic structure even after CuO inclusion due to its cage-like structures particles accumulate on zeolite as adsorbents.
The increment in selectivity is due to the pore structure of porous zeolite.
Awasthi, Metal oxides nanocomposite membrane for biofouling mitigation in wastewater treatment, Materials Today Chemistry 21 (2021) 100532
Atlabachew, Copper doped zeolite composite for antimicrobial activity and heavy metal removal from waste water, BMC chemistry 13(1) (2019) 1-12