after their adsorption onto hide powder of the polyvinyl polypyrrolidone (PVPP) (Hagerman and Butler, 1978). In brief, samples of plant extract were homogenized with adsorbent material and the mixture was stirred for 30–60 min
after their adsorption onto hide powder of the polyvinyl polypyrrolidone (PVPP) (Hagerman and Butler, 1978). In brief, samples of plant extract were homogenized with adsorbent material and the mixture was stirred for 30–60 min