Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Holger Knapp"'
Autor:
Eva Lassek, Werner Höbel, Julia Pfister, Richard Klinger, Franziska Gaßmann, Nicholas Schramek, Holger Knapp, Uwe Wollein, Andreas Miller
Publikováno v:
Journal für Verbraucherschutz und Lebensmittelsicherheit. 11:127-135
In the European Union, carminic acid and its ammonium, calcium, potassium or sodium salts and its aluminium lakes are approved as food additive E120. In beverages obtained from the German market 4-aminocarminic acid (“acid-stable carmine”) was de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0b6663e5d0c3a85c1ef2d3580bde464
https://doi.org/10.1007/s00003-015-1012-2
https://doi.org/10.1007/s00003-015-1012-2
Publikováno v:
Rapid Communications in Mass Spectrometry. 27:1083-1089
RATIONALE Brominated vegetable oil (BVO) is frequently used as a solubility transmitter in soft drinks. Being banned in Europe and Japan but permitted in the United States and Canada, there is a need for analytical methods suitable for use in food co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bd7090679e9dcd2e274efc69b35cd75
https://doi.org/10.1002/rcm.6543
https://doi.org/10.1002/rcm.6543
Autor:
Mareike Lechner, Holger Knapp
Publikováno v:
Journal of Agricultural and Food Chemistry. 59:11011-11018
A vegetation study was carried out to investigate the carryover of Perfluorooctanoic Acid (PFOA) and Perfluorooctane Sulfonate (PFOS) from soil mixed with contaminated sewage sludge to potato, carrot, and cucumber plants. Analysis was done by liquid-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08984ddb6e99a35b38d2d6e3b0c935b3
https://doi.org/10.1021/jf201355y
https://doi.org/10.1021/jf201355y
Publikováno v:
Flavour and Fragrance Journal. 17:247-250
The essential oil of Ageratum conyzoides leaves was analysed by means of GC and GC–MS; 40 constituents—13 monoterpernoids (5.17%), 17 sesquiterpenoids (13.95%) and eight chromenes (71.05%)—were identified. Two of the chromenes, 6-(1′- hydroxy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12c0cf087a2bdb75365280ba39470efa
https://doi.org/10.1002/ffj.1099
https://doi.org/10.1002/ffj.1099
Publikováno v:
Natural Product Letters. 16:87-93
3,4-Dihydroxy-7,8-dihydro-beta-ionone 3-O-beta-D-glucopyranoside 1 has been isolated from a methanolic extract of apple (Malus domestica) leaves by XAD-2 adsorption chromatography and subsequent purification by high speed countercurrent chromatograph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef684fcccc0dabf552c0729c3fb20897
https://doi.org/10.1080/10575630290019976
https://doi.org/10.1080/10575630290019976
Publikováno v:
Journal of Agricultural and Food Chemistry. 48:5812-5818
Red pigments were isolated from wine and grape-skin extracts using preparative high-speed countercurrent chromatography (HSCCC) and identified by NMR and MS techniques. Four solvent systems were developed in order to separate anthocyanins with differ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccdfe2751dba4e7d9bc03afab3410053
https://doi.org/10.1021/jf0007481
https://doi.org/10.1021/jf0007481
Autor:
Holger Knapp, Peter Winterhalter
Publikováno v:
Journal of Essential Oil Research. 12:392-399
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::427b0a4ef0d86ca5c13353f971f688c4
https://doi.org/10.1080/10412905.2000.9699544
https://doi.org/10.1080/10412905.2000.9699544
Publikováno v:
Journal of Agricultural and Food Chemistry. 48:338-343
The all-liquid chromatographic technique of high-speed countercurrent chromatography (HSCCC) has been applied for separations of anthocyanins. The biphasic mixture of tert-butyl methyl ether/n-butanol/acetonitrile/water (2:2:1:5) acidified with trifl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ec7aa832d4dd98d94c0dfe82ba7fea8
https://doi.org/10.1021/jf990876t
https://doi.org/10.1021/jf990876t
Autor:
Peter Winterhalter, Holger Knapp, Noriaki Oka, Markus Straubinger, Naoharu Watanabe, Hideaki Washio
Publikováno v:
Natural Product Letters. 13:5-10
Three novel eugenol disaccharides have been isolated from a methanolic extract of rose flowers using multilayer coil countercurrent chromatography. Their structures were unambiguously determined by two-dimensional NMR techniques (HSQC, HMBC, H-H-COSY
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27c4ef48f33b0f19a62c57214e777037
https://doi.org/10.1080/10575639908048483
https://doi.org/10.1080/10575639908048483
Publikováno v:
Natural Product Letters. 12:5-10
(3S)-3,7-Dimethyl-7-hydroxyoct-5-enyl-O-β-D-glucopyranoside (1) was isolated as aroma precursor of isomeric rose oxides (2a/b) from flowers of Rosa damascena Mill. the isolation was guided by the detection of rose oxide formation by GC and GC-MS ana
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd0d10161059651b40d1c7829d3a8476
https://doi.org/10.1080/10575639808048863
https://doi.org/10.1080/10575639808048863