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4 protocols using gallic acid

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Antioxidant Activity Assessment Protocols

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Standard compounds including gallic acid, protocatechuic acid, catechol, chlorogenic acid, p-hydroxybenzoic acid, vanillic acid, caffeic acid, sinapic acid, syringic acid, vanillin, ferulic acid, p-coumaric acid, benzoic acid, ellagic acid, cinnamic acid, apigenin, (+)-catechin, esculetin, fisetin, galangin, isohamnetin, isoquercitrin, kaempferol, luteolin, myricetin, quercetin, rhamnetin, and rutin, were purchased from Kanto Chemical Co., Inc., Tokyo, Japan.
Reagents including 1,1-diphenyl-2-picrylhydrazyl (DPPH), dibutyl hydroxytoluene (BHT), 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), potassium persulfate (K2S2O8), Folin-Ciocalteu’s reagent, aluminium (III) chloride hexahydrate (AlCl3·6H2O), β-carotene, linoleic acid, polyoxyethylen esorbitan monopalmitate (Tween-40), trichloroacetic acid (CCl3COOH), iron (III) chloride (FeCl3), sodium carbonate (Na2CO3), disodium hydrogenphosphate (Na2HPO4), sodium dihydrogenphosphate (NaH2PO4), sodium hydroxide (NaOH), and hydrochloric acid (HCl), were obtained from Kanto Chemical Co., Inc., Tokyo, Japan. All chemicals used were of analytical grade.
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2

Validating Phenolic Compound Standards

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The standard compounds for validating the phenolic compounds, including gallic acid, protocatechuic acid, catechol, chlorogenic acid, p-hydroxybenzoic acid, vanillic acid, caffeic acid, syringic acid, vanillin, ferulic acid, sinapic acid, p-coumaric acid, benzoic acid, ellagic acid, and cinnamic acid, were purchased from Kanto Chemical Co., Inc., Tokyo, Japan.
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Antioxidant and Anti-Gout Potential Evaluation

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Potassium phosphate monobasic and dibasic, Folin-Ciocalteu’s phenol, xanthine oxidase, xanthine, allopurinol, dimethyl sulfoxide (DMSO), hydrochloric acid, tricholoroacetic acid (TCA), Tween 20, thiobarbituric acid (TBA), proline, sulfosalicylic acid, glacial acetic acid, ninhydrin, and toluene were obtained from Sigma-Aldrich Japan K.K. (Tokyo, Japan). Sodium acetate, acetic acid, aluminium (III) chloride hexahydrate, 1,1-diphenyl-2-picrylhydrazyl (DPPH), dibutyl hydroxytoluene (BHT), and gallic acid were purchased from Kanto Chemical Co. Inc. (Tokyo, Japan). Acetone, potassium peroxodisulfate, 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) were obtained from Nacalai Tesque, Inc. (Kyoto, Japan). Methanol and ethanol at analytical grade were obtained from Junsei Chemical Co.; Ltd. (Tokyo, Japan).
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Bioactive Compound Extraction and Evaluation

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Extraction solvents including methanol, hexane, ethyl acetate, and butanol were purchased from Junsei Chemical Co., Ltd., Tokyo, Japan. Standards including gallic acid, rutin, butylated hydroxytoluene (BHT), kojic acid were purchased from Kanto Chemical Co., Inc., Tokyo, Japan. Palmitic acid was obtained from FUJIFILM Wako Pure Chemical Corporation.
Chemicals including sodium hypochlorite (NaClO), Folin-Ciocalteu’s reagent, sodium carbonate (Na2CO3), aluminum chloride (AlCl3), 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), potassium persulfate (K2S2O8), 2,2-diphenyl-1-picrylhydrazyl (DPPH), sodium acetate (CH3COONa), β-carotene, chloroform, linoleic acid, tween 40, dipotassium phosphate (K2HPO4), monopotassium phosphate (KH2PO4), potassium ferricyanide (K3[Fe(CN)6]), trichloro acetic acid (CCl3COOH), ferric chloride (FeCl3), dimethyl sulfoxide (DMSO), monosodium phosphate (NaH2PO4), sodium chloride (NaCl), hydrochloric acid (HCl) were obtained from Kanto Chemical Co., Inc., Tokyo, Japan. While tyrosinase, L-tyrosine, α-amylase, starch, iodine, 3-(4,5-dimethylthiazolyl)2,5-diphenyl-tetrazolium bromide (MTT), Iscove’s Modified Dulbecco’s Medium (IMDM), and cell lysis buffer were purchased from Sigma-Aldrich, St. Louis, MO, USA.
K562 and Meg-01 cell lines were obtained from American Type Culture Collection (ATCC), Virginia, United States.
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