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1995 (1)
1985 (1)
1Author    J. Gabrielska, J. Sarapuk, S. PrzestalskiRequires cookie*
 Title    Antioxidant Protection of Egg Lecithin Liposomes during Sonication  
 Abstract    When model membranes are prepared by ultrasonic treatm ent of polyunsaturated phos­ pholipids, radical production can induce a partial degradation of the polyunsaturated fatty acyl chains and the formation of lipid hydroperoxides. A suitable antioxidant employed dur­ ing liposome preparation is able to protect them against lipid peroxidation. This work con­ tains the results of studies on egg lecithin liposomes with incorporated antioxidants that were supposed to play the protective role mentioned. As it has been shown the antioxidant com pounds used ensured a 40-60% , i.e., satisfactory protection of liposomes after 30 min sonication. Possible practical applications are discussed. 
  Reference    Z. Naturforsch. 50c, 561—564 (1995); received March 10/May 11 1995 
  Published    1995 
  Keywords    Lecithin, Sonication, Liposomes, Lipid Hydroperoxides, Antioxidants 
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 TEI-XML for    default:Reihe_C/50/ZNC-1995-50c-0561.pdf 
 Identifier    ZNC-1995-50c-0561 
 Volume    50 
2Author    Krzysztof Lichszteld, Zygmunt Machoy, Anna StępińskaRequires cookie*
 Title    Chemiluminescence in the Coupled Oxidation of Lecithin and Ascorbate  
 Abstract    Chem ilum inescence (CL) that appears during oxidation o f lecithin and ascorbate has been studied. A simple system consisting only o f purified lecithin, which has one double bond, and ascorbate as a physiological reductant with a low redox potential, was used. The CL spectrum o f lecithin contain a strong band lying in the near infrared, and three bands at 20 900 cm -1, 17 700 cm -1 and 15 800 cm -1, being characteristic o f singlet m olecular oxygen (1O a). The effect o f * 0 2 quenchers on both autooxidation processes has also been investigated. The obtained results indicate that the main emitter is the *0 2. An addition o f ascorbate to the system lecithin plus buffer causes a decrease o f CL intensity. That is a result o f stronger quenching properties o f ascorbate and not due to efficiency o f the generation o f *0 2 . 
  Reference    Z. Naturforsch. 40c, 223—226 (1985); received Septem ber 13 1984 
  Published    1985 
  Keywords    Lipid Peroxidation, Singlet Oxygen, Chem ilum inescence, Lecithin, Ascorbic Acid 
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 TEI-XML for    default:Reihe_C/40/ZNC-1985-40c-0223.pdf 
 Identifier    ZNC-1985-40c-0223 
 Volume    40