Improving the stability of lycopene Z-isomers in isomerised tomato extracts

New Developments in Lycopene Analysis by Spectroscopic and Chromatographic Techniques, Accompanied With Mathematical Modelling

“…Oxidation may also take place by the action of lipoxygenase, with the formation of hydroperoxides, and the presence of some antioxidants may inhibit this reaction. These processes may be reduced by using techniques that avoid contact with oxygen in air, such as freeze-drying, microwave, or others [25,26,[52][53][54][55][56][57][58].…”

“…However, lycopene absorption can be improved by low heating as well as by reducing particle size, as is the case in many tomato products due to the technological processes applied [23,24]. The superior availability of lycopene from processed tomatoes than from raw tomatoes is probably due to the release of lycopene from the cellular matrix and the isomerization of all-trans-lycopene into cis-isomers induced by heating processes [25][26][27].…”

Aspekte der Herstellung haltbarer, lycopinreicher Gemüse- und Obstprodukte

“…Im Vergleich zu all-trans-Lycopin weisen cis-Isomere eine verbesserte Löslichkeit auf (Britton 1995), werden im Magen-/Darmtrakt verstärkt aus der Lebensmittelmatrix freigesetzt (Karakaya und Yilmaz 2007), verbessern dort die Einbindung in Micellen (Ryan et al 2008) und steigern so in vitro die Aufnahme in Darmzellen (Failla et al 2008) sowie in vivo die Aufnahme in Chylomikrone Unlu et al 2007). Publizierte Ergebnisse der industriellen Forschung deuten auf die Entwicklung eines cis-isomerenreichen Präparats auf der Basis von Tomatenextrakt hin (Lambelet et al 2009). …”

“…Cis-Lycopin ist jedoch nur während der Tiefkühlla-gerung stabil (Lambelet et al 2009;Mayer-Miebach und Behsnilian 2007 …”

Bioactive compounds and physical and chemical characteristics of mini tomatoes: influence of postharvest treatments

“…For these reasons lycopene (Z)-isomers are considered as having higher health benefits than the (all-E)-isomer (LAMBELET et al, 2009). In the present study none postharvest treatment dramatically increased Z-isomers, on the contrary decreased, as for irradiated fruits.…”