White mulberry tree (Morus alba L) is cultivated throughout Asia and Europe, including Poland. The leaves and root bark preparations from Morus alba have been used in traditional phytomedicine. The objective of the pr...White mulberry tree (Morus alba L) is cultivated throughout Asia and Europe, including Poland. The leaves and root bark preparations from Morus alba have been used in traditional phytomedicine. The objective of the present study was to compare chemical composition and antioxidative activity of aqueous extracts prepared from Polish variety of Morus alba leaves at the laboratory (L) and pilot plant scale (PP) conditions. Proximate composition, phenolic acids profile (HPLC/MS), flavonol glicosides (HPLC/ MS), polyphenols (Folin-Ciocalteu assay), and the antioxidant activity (ABTS and DPPH assay) of the extracts were determined. The main phenolic compounds were identified as gallic, protocatechuic, phydroxybenzoic, vanillic, chlorogenic, caffeic, p-coumaric, ferulic, and sinapic acids. Chlorogenic acid was the main phenolic constituent of both extracts. The flavonols fraction contained rutin, quercetin 3-β-D-glucoside, and kaempferol 3-β-D- glucopyranoside. Total concentration of phenolic compounds were 7.9 g and 14.4 g gallic acid equivalent/100 g extract, and antioxidant activity was 137.1 and 214.1 μMol Trolox equivalent/g dry weight for the PP and L extracts, respectively. We concluded that current pilot plant process is less efficient than laboratory process at the aqueous extraction of bioactive components from Morus alba dried leaves. Potential improvements may include increasing efficacy of the extraction, decreasing losses of bioactive components during the process, or both.展开更多
The aim of the study was to develop the technology of muesli via analyzing the addition of white mulberry fruit. The first step involved the selection of ingredients from bioactive compounds. Next, the technology of p...The aim of the study was to develop the technology of muesli via analyzing the addition of white mulberry fruit. The first step involved the selection of ingredients from bioactive compounds. Next, the technology of production was developed. Then, the antioxidant activity of new muesli with potentially pro-health model systems was estimated. Muesli was characterized in terms of its basic nutritional value, and antioxidant potential. The ability to inactivate DPPH and ABTS radicals was estimated. In addition, the amount of fat in muesli was calculated. As part of this calculation, fatty acid composition and content of primary and secondary oxidation products were ascertained. The last stage of the project included sensory analysis of the resultant products. Our studies showed that the new product-muesli had high nutritional value, high antioxidant potential and a positive fatty acid composition. And sensory analysis showed that the product was attractive.展开更多
文摘White mulberry tree (Morus alba L) is cultivated throughout Asia and Europe, including Poland. The leaves and root bark preparations from Morus alba have been used in traditional phytomedicine. The objective of the present study was to compare chemical composition and antioxidative activity of aqueous extracts prepared from Polish variety of Morus alba leaves at the laboratory (L) and pilot plant scale (PP) conditions. Proximate composition, phenolic acids profile (HPLC/MS), flavonol glicosides (HPLC/ MS), polyphenols (Folin-Ciocalteu assay), and the antioxidant activity (ABTS and DPPH assay) of the extracts were determined. The main phenolic compounds were identified as gallic, protocatechuic, phydroxybenzoic, vanillic, chlorogenic, caffeic, p-coumaric, ferulic, and sinapic acids. Chlorogenic acid was the main phenolic constituent of both extracts. The flavonols fraction contained rutin, quercetin 3-β-D-glucoside, and kaempferol 3-β-D- glucopyranoside. Total concentration of phenolic compounds were 7.9 g and 14.4 g gallic acid equivalent/100 g extract, and antioxidant activity was 137.1 and 214.1 μMol Trolox equivalent/g dry weight for the PP and L extracts, respectively. We concluded that current pilot plant process is less efficient than laboratory process at the aqueous extraction of bioactive components from Morus alba dried leaves. Potential improvements may include increasing efficacy of the extraction, decreasing losses of bioactive components during the process, or both.
文摘The aim of the study was to develop the technology of muesli via analyzing the addition of white mulberry fruit. The first step involved the selection of ingredients from bioactive compounds. Next, the technology of production was developed. Then, the antioxidant activity of new muesli with potentially pro-health model systems was estimated. Muesli was characterized in terms of its basic nutritional value, and antioxidant potential. The ability to inactivate DPPH and ABTS radicals was estimated. In addition, the amount of fat in muesli was calculated. As part of this calculation, fatty acid composition and content of primary and secondary oxidation products were ascertained. The last stage of the project included sensory analysis of the resultant products. Our studies showed that the new product-muesli had high nutritional value, high antioxidant potential and a positive fatty acid composition. And sensory analysis showed that the product was attractive.
