Figure 4. Identification of the chemical nature of the compound in F3 and F4. FeCl₃ solution was sprayed over the spotted fraction on the TLC plate and turned its color into black indicating the presence of the phenolic compound in fractions (A, lane 2). The purity of E8 was checked and compared to the combined fraction Fc (A, lane 3). The fraction E8 was about 70–80% pure with slight impurities at the baseline. A: Spotted compound before spray (lane 1), sprayed with FeCl₃-ethanol solution (lane 2). B: Further separation of combined fractions of F3 and F4. Eluted fraction E8 showed urease inhibition. C: sprayed with Dragendorff’s reagent (lane 4), Fc: Combined fractions sprayed with FeCl₃ (lane 6), E8: Pure compound (E8) sprayed with FeCl₃ (lane 5)

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Non-flavonoid Polyphenol of Allium cepa Tuber Inhibits Bacterial Urease and the Proliferation of Lung Cancer Cells

Saadullah, Aziza Sultana, Md. Najem Uddin, Md. Atikur Rahman, Most. Reshma Akter, Ismot Ara Shathi, Mst. Bobita Yeasmin, Md. Mahadi Hasan Lavlu, Monika Rani Saha, Aktar Uzzaman Chouduri

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