"521281" . "Kov\u00E1\u0159ov\u00E1, Marcela" . "1618-2642" . "6"^^ . . "Analytical and Bioanalytical Chemistry" . "Extraction of p-hydroxyacetophenon and catechin from Norway spruce needles. Comparison of different extraction solvents"@en . . . . "Extraction efficiency of different solvents extracting two main phenolic compounds from spruce needles was tested. Although 80% aqueous methanol is most frequently used for this type of material, it was found that pure methanol is a more suitable extraction solvent. A two-step extraction of crushed needles with water and methanol was a good alternative. Greater yields of p-hydroxyacetophenone than catechin extracted from uncrushed versus crushed needles indicate that sample preparation prior analysis is important as it significantly influences the results."@en . "Vosmansk\u00E1, M." . "Volka, K." . "382" . "5"^^ . "Extraction of p-hydroxyacetophenon and catechin from Norway spruce needles. Comparison of different extraction solvents"@en . . . . "Picea abies; phenolic compounds; extraction"@en . "Extrakce p-hydroxyacetophenonu a katechinu ze smrkov\u00E9ho jehli\u010D\u00ED. Srovn\u00E1n\u00ED r\u016Fzn\u00FDch extrak\u010Dn\u00EDch \u010Dinidel"@cs . . . "Extraction of p-hydroxyacetophenon and catechin from Norway spruce needles. Comparison of different extraction solvents" . "Byla zji\u0161\u0165ov\u00E1na extrak\u010Dn\u00ED \u00FA\u010Dinnost r\u016Fzn\u00FDch \u010Dinidel a postup\u016F p\u0159i extrakci dvou hlavn\u00EDch fenolick\u00FDch l\u00E1tek ve smrkov\u00E9m jehli\u010D\u00ED, p-hyfroxyacetophenonu a katechinu. P\u0159esto\u017Ee se k extrakci nej\u010Dast\u011Bji pou\u017E\u00EDv\u00E1 80% metanol, jako nej\u00FA\u010Dinn\u011Bj\u0161\u00ED se projevil metanol \u010Dist\u00FD. Dobrou alternativou extrakce v \u010Dist\u00E9m metanolu byla dvoustup\u0148ov\u00E1 extrakce rozdrcen\u00FDch jehlic (voda+metanol). Drcen\u00ED vzork\u016F ovlivnilo mno\u017Estv\u00ED extrahovan\u00FDch l\u00E1tek, co\u017E ukazuje na d\u016Fle\u017Eitost p\u0159\u00EDpravy vzork\u016F p\u0159ed anal\u00FDzou."@cs . . . "F\u00E4hnrich, J." . "S\u00FDkora, D." . . . . "1135;1140" . . "-" . . "Extraction of p-hydroxyacetophenon and catechin from Norway spruce needles. Comparison of different extraction solvents" . "[10E2CEF16617]" . "Extrakce p-hydroxyacetophenonu a katechinu ze smrkov\u00E9ho jehli\u010D\u00ED. Srovn\u00E1n\u00ED r\u016Fzn\u00FDch extrak\u010Dn\u00EDch \u010Dinidel"@cs . "P(GA206/05/0269), Z(AV0Z60050516)" . . "RIV/67985939:_____/05:00028359" . "DE - Spolkov\u00E1 republika N\u011Bmecko" . "RIV/67985939:_____/05:00028359!RIV06-AV0-67985939" . "Extraction efficiency of different solvents extracting two main phenolic compounds from spruce needles was tested. Although 80% aqueous methanol is most frequently used for this type of material, it was found that pure methanol is a more suitable extraction solvent. A two-step extraction of crushed needles with water and methanol was a good alternative. Greater yields of p-hydroxyacetophenone than catechin extracted from uncrushed versus crushed needles indicate that sample preparation prior analysis is important as it significantly influences the results." . "1"^^ .