
Keywords: رنگدانه طبیعی; Beet stalks; Betalains; Natural pigment; Peroxidase activity; Microfiltration; UltrafiltrationSodium hydroxide (PubChem CID: 14798); Citric acid (PubChem CID: 311); Sodium hypochlorite (PubChem CID: 23665760); Disodium hydrogen phosphate (PubChem CID: 242