Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Alois Steigel"'
Autor:
Alois Steigel, Michael Hodenius, Detlef Müller-Schulte, Heiko Lueken, Marcel De Cuyper, Linda Desender
Publikováno v:
Chemistry and Physics of Lipids. 120:75-85
Dimyristoylphosphatidylethanolamine (DC(14:0)PE) and the dioleoyl analogue (DC(18:1cis)PE) were mixed with alpha-biotinylamido-omega-N-succinimidoxycarbonyl-poly(ethylene glycol) (NHS-PEG-biotin) and quantitatively converted to alpha-biotinylamido-om
Publikováno v:
Planta Medica. 67:437-442
From the rhizomes of Atractylodes lancea, 2-[(2'E)-3',7'-dimethyl-2',6'-octadienyl]-4-methoxy-6-methylphenol (1) was isolated as a new natural product. The compound showed strong inhibitory effects on 5-lipoxygenase (5-LOX) and cyclooxygenase-1 (COX-
Publikováno v:
Biocatalysis and Biotransformation. 19:51-68
During the enzymatic synthesis of open chain ketose-1-phosphates on a preparative scale using fructose-1,6-bisphosphate aldolases from Staphylococcus carnosus a successive reaction of excess aldehyde with the primary reaction product was observed lea
Publikováno v:
Phytochemistry. 46:1023-1028
Six new polyacetylenes have been isolated from the rhizomes of Atractylodes lancea . Besides 1-(2-furyl)-(7 E )-nonene-3,5-diyne-1,2-diacetate, a new natural compound, two further vicinal diacetoxyalkenynes were postulated as erythro- and threo -form
Autor:
Dietmar Baltschun, Alois Steigel, Joachim Paust, Hans-Dieter Martin, Helmut Sies, Karlis Briviba, Wilhelm Stahl, Frank Stenhorst, Stephan Röver, Stefan Beutner, Manfred Peters
Publikováno v:
Liebigs Annalen. 1997:1887-1893
The bimolecular rate constants kq for quenching of singlet oxygen (1Δg state) by 26 different natural and novel synthetic carotenoids were determined at 37 °C in a mixture of chloroform and ethanol. The steady-state technique used involves the gene
Publikováno v:
Planta Medica. 61:544-550
From flowerheads of Arnica angustifolia ssp. attenuata nine helenanolides, two 1,5- trans-guaianolides, and a mixture of inositol-tetraesters were isolated. Five of the helenanolides are described for the first time. One of them, 4- O-tigloylarnicalp
Publikováno v:
Synlett. 1992:827-829
Publikováno v:
Liebigs Annalen der Chemie. 1993:621-624
Stereochemistry of Aldol Reactions with 3-Hexulose Phosphate Synthase The enzymic reaction between ribulose-5-phosphate (1) and formaldehyde or acetaldehyde catalyzed by hexulose phosphate synthase (HPS) from Methylomonas M 15 DSM 580 yielded D-arabi
Autor:
Marita Grothus, Lothar Elling, Hans-Peter Brockamp, Maria-Regina Kula, Alois Steigel, Torsten Minuth, Jörg Peters
Publikováno v:
Tetrahedron: Asymmetry. 4:1173-1182
The chemoenzymatic synthesis of 20-6-deoxy-α-L-sorbofuranosyl-D-glucuse has been performed by coupling four enzymatic and one simple chemical step on a preparative scale with 17% overall yield. At first, pyruvic aldehyde dimethyl acetal was reduced
Publikováno v:
Journal of Chromatography A. 637:201-205
An HPLC method using a reversed-phase Suplex-pKb-100 column that resolves photoisomerates of retinoic acid into nine peaks of products and the initial all- trans isomer is described. This separation is achieved with an isocratic mobile phase and a to