Chromatographische Untersuchungen der hydrophoben Eigenschaften von Tocopherolen

Abstract

matographische Vorfraktionierung kann gegebenenfalls eine chemische Aufarbeitung der Extrakte vermieden werden.Eine Gewinnung der Ubichinone aus methylotrophen Abfall-Biomassen erscheint mit Hilfe der beschriebenen Verfahrensschritte nur dann sinnvoll, wenn die Biomassen Ubichinongehalte > 0.05% aufweisen. Das ist bei den Biomassen von Acetobacter methanolicus aus der Gluconsaureproduktion der Fall. Diese lassen sich auch leicht mittels Hochdruckextraktion extrahieren. Immerhin konnen in 100 t dieser Anfall-Biomasse etwa 100 kg Ubichinon-10 enthalten sein, eine Menge, die eine Gewinnung dieses biogenen Wertstoffes als eine lohnende Aufgabe erscheinen lafit. L i t e r a t u r ' G . Jacini, Fette-Seifen.Anstrichmitte1 87, 57 [1985].

Selective Separation of Tocopherol Homologues by Liquid−Liquid Extraction Using Ionic Liquids

“…From these published results, ILs have been revealed to have the strong ability of interacting with organic molecules through various mechanisms (e.g., π−π, dispersion, ionic exchange, hydrogen bonding). ,− Moreover, these interactions can be finely adjusted by the change of IL’s cation or anion task-specifically, thus often bringing on elevated separation efficiency as compared to the traditional solvents . For example, several compounds with a hydrogen-bond donor group, such as phenols and other weak-acidic compounds, were separated from water solution with a high efficiency by using appropriate ILs as extractants. , Therefore, because the tocopherol homologues have different hydrogen-bond acidities that stem from their structural differences, it is reasonable to speculate that they are likely to be separated with each other effectively by some specific kinds of ILs via hydrogen-bonding interactions mainly. In the present work, we then investigated the application of ILs as extractants in the selective separation of tocopherol homologues from their mixtures for the first time.…”

“…23 For example, several compounds with a hydrogen-bond donor group, such as phenols and other weak-acidic compounds, were separated from water solution with a high efficiency by using appropriate ILs as extractants. 25,30 Therefore, because the tocopherol homologues have different hydrogen-bond acidities that stem from their structural differences, 47 it is reasonable to speculate that they are likely to be separated with each other effectively by some specific kinds of ILs via hydrogen-bonding interactions mainly.…”

THE APPLICATION OF TOPOLOGICAL INDEXES FOR PREDICTION OF THE RM VALUES FOR TOCOPHEROLS IN RP-TLC

“…(2,(5)(6)(7)(8)(9)(10) Tocopherols are being intensively studied, owing to their medical, biological, and physico-chemical significance. (11)(12)(13)(14) The problem of the separation of α-, β-, γ-and δ-tocopherols has been the subject of numerous papers. (15)(16)(17) The aim of this work is the use of the topological indexes for prediction of the R M values of the tocopherols separated by RP-TLC technique.…”

Lipophilic Vitamins

“…Tocopherols have been intensively studied owing to their medical, biological, and physicochemical significance (85)(86)(87). Tocopherols have been intensively studied owing to their medical, biological, and physicochemical significance (85)(86)(87).…”

“…Although y-tocopherol is a more effective free radical scavenger than a-tocopherol in vitro (91), the reverse is true in vivo (92). phase of methanol-water (9.5:0.5) by Sliwiok and Kocjan (87). The antioxidative effect of the different tocopherols may not be identical.…”