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Introduction Tissue engineering is an interdisciplinary field combining the science and technology of biology and chemistry to submit a promising alternative for the treatment of loss or the malfunction of an organ without the restrictions of today's therapies [1].
The porous scaffolds need three dimensional interconnected porous structures which can supply the suitable space for cell migration, adhesion, proliferation, and differentiation.
The morphology and structure of the as-fabricated merwinite-akermanite porous scaffolds are shown in Figure 3.
Its porous structure was anticipated to be adequate to allow tissue ingrowth, bone cell attachment and vascularization.
Inorganic and Nano-Metal Chemistry, 2019: p. 1-7

Their structures were confirmed and elucidated by physical, chemical and spectroscopic analysis including IR, UV, MS, 1D and 2D NMR spectra.
Zhang et al. [51] also underwent a chemical qualitative assay on the whole plant of M. pudica and reported five different flavonoids and their structures were determined by 1H-NMR, 13C-NMR and MS, and the purities of all the isolated flavonoids were calibrated by normalization method (purities > 98%).
Fig. 2 shows the structures of some major chemical constituents isolated from the whole plant of M. pudica.
Chemical structures of some major chemical constituents of Mimosa pudica. a) Mimosine, b) Mimosinic acid, c) Tyrosine, d) Mimosinamine, e) Potassium-5-O-β-O-glucopyranosylgentisate, f) 7,8,3’,4’-tetrahydroxyl-6-C-β-d-glucopyranosyl flavone, g) 5,7,3’,4’-tetrahydroxyl-6-C-β-d-glucopyranosyl flavone.
Williams, Foye’s Principles of Medicinal Chemistry, fifth edn., Lippincott Williams and Wilkins Publication, 1995

Benosman2,3,c 1Civil Engineering Department, University Mustapha Stambouli of Mascara, Bp736 route de Mamounia, Mascara 29000, Algeria 2Department of Chemistry, EPST, Tlemcen 13000, Algeria. 3Faculty of Exact Sciences and Applied, Laboratory of Polymer Chemistry, University of Oran 1, Ahmed Benbella, Algeria.
In reinforced concrete structures, concrete acts as an electrolyte while the reinforcement develops a potential which depends on the environment of concrete; this potential can vary from one place to another.
The chemical attack due to sodium chloride and sodium sulfate together, after their penetration into the cementitious matrix, is characterized by the reaction of this solution with hydrates and the change in their structure.
Several studies indicate that the increase in the compressive strength before its starts falling at a certain age results from the formation of ettringite and gypsum which both fill the micropores; this leads to a dense structure.
The chemical attack due to sodium chloride and sodium sulphate together, after their penetration into the cementitious matrix, is characterized by the reaction of this solution with hydrates and the change in their structure

Additionally the peaks ascribed to the aromatic structures in the extract are increased to a noticeable extent (1600, 1515, 1335 cm-1).
The obtained amount of the monomers, mostly syringyl structures, decreases after thermal treatment (Figure 10).
The presented results confirm that already the temperature load of 200 °C causes strong alterations in the lignin structure of the investigated hardwood species ash and beech.
Wegener: Wood: Chemistry, Ultrastructure, Reactions.
In: Methods in Lignin Chemistry.

MF 1 Alter geometry form or 2 Alter physics state or 3 Alter chemistry comp. or 4 Alter the biological configuration or 5 Change the information Expression AF 1 Transportation and holding of substance 2 Movement form inputting 3 Energy inputting 4 Order inf.
Structural cha MC 1 Artistry of structure 2 Standardization of mach. 3 Timeliness of produce 4 Rationality of tolerance 5 Maintenance. of machine 6 Feasibility of conveyance 7 Recycle of scrap 8 Economic manufacturing.
The major function: it is used to alter the expression forms of the geometry, physics, chemistry, and biological configuration or information of the substance.
Three major performances: Structural performances: 1) Securities of human and machine, 2) Reliability of the systems, 3) Working durability, 4) Adaptability of materials, 5) compactness of structures, 6) Harmlessness to environment, 7) Artistic styling, 8) Economic design.
Technological performance: 1) Technology of structure, 2) Standardization of machine, 3) Timeliness of produce (product cycles), 4) Rationality of tolerance, 5) Convenience of maintenance, 6) Feasibility of conveyance, 7) Recyclability, 8) Economic manufacturing.

As a conclusion, when sintering temperature was increased, the porosity in the structure was decreased.
Comparing the other studies formerly mentioned [6,7] based on binary composites, the mechanical properties were by far upgraded –from the compressive strength of σavr = 83,03±33 MPa [6] and 122,31 MPa [7] to 371.9684±38.36 MPa in our study- and this product can also be applicable to porous structure owing to its improved mechanical properties.
Boccaccini, Fabrication and characterization of porous bioceramic composites based on hydroxyapatite and titania, Materials Chemistry and Physics 103 (2007), 95–100

Then, this gel was treated by ozone at different treatment time (5 min, 10 min, 20 min, 25 min, and 30 min) and voltage of ozonolysis (0.7 kV, 1.5 kV, 2.4 kV, and 3.2 kV) on PMPS-g-NR (ozonolysed PMPS-g-NR) to obtain the optimum condition for generating the active species, e.g. carbonyl or aldehyde structures.
It can suggest that the ozonolysis method can generate the active species of carbonyl or aldehyde structures, which can coordinate to metal iodide in liquid electrolyte.
Zaikov, Fields of ozone applications, Chemistry&chemical technology. 3 (2009) 139-161

They also used MD simulation to investigate cascade damage near pre-existing He bubbles in different W structures.
A total of 30 He bubbles were created above, below, and within the GB structure.
Blue points represent He bubbles, while grey points represent Σ17GB structure.
Four main structures have been constructed (i.e., W, W-He-AGB, W-He-BGB, and W-He-GB).
Bromley (Ed.), Treatise on Heavy-Ion Science: Volume 6: Astrophysics, Chemistry, and Condensed Matter, Springer US, Boston, MA, 1985: pp. 93–129

Restoration of the balance of structural bonds and the state of the structure of the material is able to function in the road structure occurs with this approach.
Smart Materials and Structures.
Conf. on Durability of Concrete Structures. (2008), pp. 195-204
Advanced Materials, Structures and Mechanical Engineering.
Advances in chemistry.

Finally, FTIR and SEM analyses after adsorption confirmed the presence of MO on the surface of the beads and revealed an intact and stable structure.
SEM image at 5000 magnification as shown in Fig. 1 (right) revealed a porous structure of the CS-PEI-GO beads.
At acidic conditions (pH=3), methyl orange changes its color from orange to red due to a change in its structure from azo to quinoid [8].
The SEM analysis after adsorption (Fig. 5 right) revealed that the CS-PEI-GO beads remained intact and stable in structure.
Influence of crystal structure of nanosized ZrO2 on photocatalytic degradation of methyl orange.