Keywords: فعالیت ضد تیروزیناز; AA; ascorbic acid; Abs; absorbance; ABTS; 2â²-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid; CAT; catechin; DP; dried pomace; DW; dry weight; GA; gallic acid; KA; kojic acid; WP; wet pomace; Antioxidant activity; Anti-tyrosinase activity; By-product;