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Synthesis and Evaluation of Iron (III)-Red Onion Skin Extract Azo Complexes as Pigments for Surface Coatings in Oilfield Environment

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Figure

Fig. 1. Structure of quercetin
Table 1. Physical characterization
Fig. 2. Infrared spectrum of unmodified onion skin extracts (UROSE)
Fig. 5. Scanning electron microscopy of UROSE
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