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After mix with concrete, the structure of oil palm fibre has been changed from irregular shape to interconnected like skeleton structure[7].
Besides that, through the internal pore structure of oil palm fibre we can see the self-made concrete has large honeycomb structure inside and is not fully compacted.
The honeycomb pore structure wide spread in concrete which determined high strength and performance characteristics become lower.
History- Chemistry- Industries - Civil Engineering.
Materials and Structures, 49(1-2), pp.317-327 [6]Haider M.

The unique structure of nanomaterials has opened up a new dimension for development of nanotechnology applications.
Culea, “The local structure of gadolinium vanado-tellurite glasses,” Journal of Materials Science, vol. 43, pp. 3713-3716, 2008
Stevels, “The structure of borate glasses studied by Raman scattering,” J.
Culea, “The local structure of bismuth borate glasses doped with europium ions evidenced by FT-IR spectroscopy,” J.
Jandra, “Natural Fe3O4 nanoparticles embedded zin-tellurite glasses: Polarizability and optical properties,” Materials Chemistry and Physics, vol.138, pp.174-178, 2013.

From the XRD results, we could also conclude that the chelated structure of metallic ions ```and CA in gel undergoes a one-step decomposition process to form the perovskite structure of PZT 95/5.
Upon thermal treatment, the chelated compound transforms into perovskite structure directly without any intermediates.
Though Fig. 3 a shows the pure perovskite structure sintered at 975 oC, there are secondary phases in PZT 95/5 ceramics sintered at 1025 and 1075 oC.
XRD patterns show complete perovskite structure of the ceramics sintered at 1125 oC for 2 h (Fig. 3d).
SEM of ceramics sintered at 1125 o C (Fig. 4b) indicates the sintered materials have fine-grain structures with individual grain of 1-3 µm in size.

Structures used in the refinement were Pt-fcc.
The two structures, e.g.
The internal structure of the agglomerates consists of spherical nanoparticles of the size of 2-6 nm.
The internal structure of the agglomerates consists of spherical nanoparticles of the size in the range 2-6 nm.
nm nm 10.0 20.0 30.0 40.0 0 - 4.5 0 4.5 The two structures, e.g.

For better compatibility, PPS and CF synthesize a polymer containing an amino group in the structure.
Rzhevskaya, et al., Influence of the length and concentration of carbon and glass fibers on the properties of polyphenylene sulfone, Fibre Chemistry. 50 (2018) 354-360
Khakulova, et al., Development of composite material based on polyphenylene sulfone for 3D printing, Fiber Chemistry. 50 (2018) 373-377
Structure and thermal properties, Carbon. 48 (2010) 3485-3499
Inoue, Structure development in epoxy resin modified with poly (ether sulphone), Polymer. 30 (1989) 662-667

The study of the process of thermo vacuum drying of brown coal allows determining more precisely not only the energy characteristics of the method, but also the effect on the molecular structure of coal.
Chemistry & Chemical Technology, 11(2), 242-246. https://doi.org/10.23939/chcht11.02.242 [18] Gorova, A., Pavlychenko, A., Borysovs’ka, O., & Krups’ka, L. (2013).
Optimization of heat-and-power plants water purification, Chemistry and Chemical Technology, 13(2), 218-223. https://doi.org/10.23939/chcht13.02.218 [22] Vambol, S., Vambol, V., Sundararajan, M., & Ansari, I. (2019).
Chemistry & Chemical Technology, 9(4), 467-470. https://doi.org/10.23939/chcht09.04.467 [26] Kolesnik, V.Ye., Fedotov, V.V. & Buchavy, Yu.V. (2012).
In the Science of Victorian Brown Coal: Structure, Properties and Consequences for Utilization; Durie, R.A., Ed.; Buterworth-Heinemann Ltd.: Oxford, UK

The results showed that foaming temperature has a remarkable effect on sample pore structure ；Foaming time has a less effect on pore distribution but its effect on the diameter of the pore is obvious; Heating rate has a less effect on the diameter of the pore.
Foam glass structure analysis Foam glass's crystallization can affect the heat insulation performance and the compressive strength of foam glass.
(2) Foaming temperature has a remarkable effect on sample pore structure；Foaming time has a less effect on pore distribution but its effect on the diameter of the pore is obvious; Heating rate has a less effect on the diameter of the pore
Chemistry industry Press,2006,1

The PDE system, assembled on the basis of the fundamental holding electro-chemistry laws, is numerically solved by a locally refined FD method.
Let us fix the origin of the reference frame at the anode and choose the (x) axis parallel to the symmetry axis of the cylindrical structure.

The structure of ZIFs comprises metal ions, such as Co, Cu, and Zn, and imidazole ligands [1]; the metal ions are tetrahedrally coordinated to and form an angle of 145° with imidazole linkers, which is similar to the case for aluminosilicate zeolites [2,3].
Results and Discussions 3.1 Characterization The crystal structure and phase purity of the synthesized ZIF-8 materials were determined by X-ray diffraction.
Subsequently, zinc ions became coordinated to OH- and NH3 to form hydrated Zn(II)complexes, and finally, the ZIF-8 structure was formed via the competing reaction of the deprotonated 2-MeIM ligand and Zn(II)complexes [27,28].
Therefore, as compared to ZIF-8 prepared in H2O or MeOH without the addition of basic media, the TEM and SEM images of ZIF-8-NH4OH revealed a ZIF-8 structure with a regular cubic shape and a particle size of approximately 963 nm.
This result was relatively consistent with a previous report indicating that an increase in the basicity of the solution can enhance the reaction equilibrium and accelerate the deprotonation of 2-MeIM, resulting in crystal growth and yielding a larger crystalline structure [29].

Ni was employed as a template for uniform mesoporous structure.
The TEM image in Fig. 1b confirms that Ni particles presented in the carbon structure before the acid treatment.
The dominantly mesoporous structure and appropriately porous size are advantageous to quick mass transfer and ion diffusion [10] for aqueous capacitors, consequently, leading to a higher capacitance.
The contents of carbon, hydrogen and nitrogen of the NMC together with pore structure parameters.
Conclusions In this study, nitrogen-doped mesoporous carbons were successfully prepared through a facile procedure using using surfactants (polyvinylpyrrolidone) as a nitrogen-containing carbon source and Ni was employed as a pore structure template.