Evaluation of barley grass as a potential source of some nutritional substances

Ivana Paulíčková, Jaroslava Ehrenbergerová, Vlasta Fiedlerová, Dana Gabrovská, Pavla Havlová, Marie Holasová, Jiří Kopáček, Jarmila Ouhrabková, Jitka Pinkrová, Jana Rysová, Kateřina Vaculová and Renata Winterová
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Ivana Paulíčková: Food Research Institute Prague, Prague, Czech Republic
Jaroslava Ehrenbergerová: Mendel University of Agriculture and Forestry in Brno, Brno, Czech Republic
Vlasta Fiedlerová: Food Research Institute Prague, Prague, Czech Republic
Dana Gabrovská: Food Research Institute Prague, Prague, Czech Republic
Pavla Havlová: Research Institute of Brewing and Malting, Brno, Czech Republic
Marie Holasová: Food Research Institute Prague, Prague, Czech Republic
Jiří Kopáček: Mendel University of Agriculture and Forestry in Brno, Brno, Czech Republic
Jarmila Ouhrabková: Food Research Institute Prague, Prague, Czech Republic
Jitka Pinkrová: Food Research Institute Prague, Prague, Czech Republic
Jana Rysová: Food Research Institute Prague, Prague, Czech Republic
Kateřina Vaculová: Agricultural Research Institute Kroměříž, Ltd. and Agrotest fyto, Ltd. Kroměříž, Kroměříž, Czech Republic
Renata Winterová: Food Research Institute Prague, Prague, Czech Republic

Czech Journal of Food Sciences, 2007, vol. 25, issue 2, 65-72

Abstract: Barley green matter was analysed for the contents of vitamin C, total polyphenols, phenolic compounds, proteins, amino acids, and saccharides; the activity of catalase was also determined. The contents of vitamin C, total polyphenols, and ferulic acid decreased with the age of barley plants. The influence of the variety has not been proved unequivocally. The contents of vitamin C between 0.107-6.357 g/kg DM, of total polyphenols between 17.167-35.559 g/kg DM, and of ferulic acid between 0-5.916 g/kg DM were found. Catalase activity amounted to 4.5-29.7 TSU. The monosaccharide profile showed high contents of glucose (15.40-88.40 g/kg DM) and fructose (37.60-81.40 g/kg DM) which decreased with the plant growth. The contents of saccharose and galactose were low, ranging between 0-7.70 g/kg DM and 3.70-5.30 g/kg DM, respectively. The relations between their contents and the growth phase were insignificant. The total amino acid content decreased with the plant age. High contents of aspartic (15.232-28.682 g/kg DM) and glutamic acids (16.694-35.526 g/kg DM), as well as minimal contents of sulphur amino acids, especially methionin (2.586-5.03 g/kg DM), could be noted. The highest catalase activity was found in the early growth phase (18.5-35.1 TSU), being higher in all samples grown at the location Kromeriz. The yield of juice pressed out from frozen green matter amounted to 68%. The pressed out juice was preserved by fluid drying, freeze drying, and freezing. In respect to folates and total polyphenols contents and the antioxidant activity, freezing appears the most suitable procedure for preserving.

Keywords: barley grass; nutrition; preservation; antioxidants; vitamins (search for similar items in EconPapers)
Date: 2007
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:25:y:2007:i:2:id:754-cjfs

DOI: 10.17221/754-CJFS

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Czech Journal of Food Sciences is currently edited by Ing. Zdeňka Náglová, Ph.D.

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