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The FTIR spectrum of graphene it has been shown in Rattna & et al [24].
By using solid state nuclear magnetic resonance (NMR) spectroscopy to probe the samples, Lerf et al.(1998) [37] were able to suggest a nonstoichiometric form, containing hydroxyl and epoxy functional groups and some carbonyl groups (carboxyl, carbonyl, ester) along the graphite oxide sheet edge.
Punckt et al. (2013) [39] reported the smallest ratio of (C/O) to obtain electrical conductivity again is 7.3±0.1, and lower that the GO is still an insulator [40].
Chafik El Idrissi, S.

Kodur et al. (2014 discovered a similar result, stating that due to water loss, the density or mass of concrete reduces with increasing temperature [27].
El-Attar and A.

El-Hassan, P.
Tunio et al, Effect of Coarse Aggregate Gradation and Water-Cement Ratio on Unit Weight and Compressive Strength of No-fines Concrete, Engineering, Technology & Applied Science Research 9 (1) (2019) 3786-3789

Abd El-baky, Particle-Reinforced Polymer MatrixComposites (PMC) Fabricated by 3DPrinting, J Inorg Organomet Polym Mater 33 (2023). https://doi.org/10.1007/s10904-023-02819-1
Zhang, Bulk TiB2-Based Ceramic Composites with Improved Mechanical Property Using Fe–Ni–Ti–Al as a Sintering Aid, Materials 7 (2014) 7105–7117. https://doi.org/10.3390/ma7107105

Al-Sabagh, Polyaniline nanotubes: Facile synthesis, electrochemical, quantum chemical characteristics and corrosion inhibition efficiency, J.
El-Hefnawy, S.

Lu, E.L.
Al-Shareef, R.

Many mining operations are increasingly adopting this technique, with the El Peñón Mine in Chile serving as a prime example [11, 14].
Bebbington, et al., Tailings facility failures: An analysis of causes and consequences," Resour.

Choudhury et al. [21] tried to reproduce our results on their own ceramics of Sr0.98Mn0.02TiO3 in comparison to samples with different nominal site-specific doping, viz.
B Vol. 61 (2000), p. 3897 [25] E.L.

El-Gamal, M.
Al-Snafi, "The pharmacology of Anchusa italica and Anchusa strigosa-A review," International Journal of Pharmacy and Pharmaceutical Sciences, 6 (2014) 7-10

[2] V Bhadang, K.A. et al., 2010.
El Hamidi, M.