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. 2022 Apr 22;12:6614. doi: 10.1038/s41598-022-10546-9

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Localization of melanin in mature date fruits, (a) Scanning electron microscopic (SEM) image showing the tanniferous cells between the outer and inner mesocarp, and (b) Light microscopic images stained with 4-dimethyl amino cinnnamaldehyde (DMACA, left) and ferric chloride/potassium ferric cyanide (right) showing the presence the localization of melanin/proanthocyanidins in the tanniferous cells layer.