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1995 (1)
1985 (1)
1Author    Arkadiusz Kozubeka, Jacek SkałabRequires cookie*
 Title    Fusiogenic Activity of Natural Amphiphiles, 5-fl-Alkylresorcinols in a Yeast Protoplast System  
 Abstract    Two hom ologues of cereal grain resorcinolic lipids, 5-/7-heptadecylresorcinol and 5-/7-hepta-decenylresorcinol studied in the system employing yeast cell protoplasts showed marked fusiogenic activity. The frequency of hybrid formation induced by studied amphiphiles was significantly higher than that obtained with the use of 40% (w/v) polyethylene glycol 4000. The resorcinolic lipids as fusion-inducing agents did no affect regeneration of the cellular wall. The fusiogenic activity of resorcinolic lipids lost when calcium ions were absent in the medium. Fusiogenic activity of studied amphiphiles is related to their ability to induce non­ bilayer structures within the cellular membranes. 
  Reference    Z. Naturforsch. 50c, 656 (1995); received May 17. June 8. 1995 
  Published    1995 
  Keywords    Phenolic Lipids, 5-Alkylresorcinols, Fusion Yeast, Protoplast 
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 TEI-XML for    default:Reihe_C/50/ZNC-1995-50c-0656.pdf 
 Identifier    ZNC-1995-50c-0656 
 Volume    50 
2Author    Arkadiusz KozubekRequires cookie*
 Title    Higher Cardol Homologues (5-Alkenylresorcinols) from Rye Affect the Red Cell Membrane-Water Transport  
 Abstract    The influence o f 5-heptadecenylresorcinol and total rye 5-alkenylresorcinols isolated from rye grains on the red blood cell water perm eability was studied using osm otic shrinkage experim ents performed in 300 m M sucrose. The studied com pounds induced significant increase o f erythro­ cyte water permeability. The threshold concentration needed for the increase o f water per­ meability was in an order o f 10_ 6 m ol/l. The temperature dependence o f the observed process showed the discontinuity which was related to the 5-alkenylresorcinol transition temperatures. It was shown also that alkenylresorcinols did not exert the biphasic action on hypotonic lysis o f erythrocytes usually observed for water soluble surfactants. The sp ecific lysine activity is postulated for the studied compounds. 
  Reference    Z. Naturforsch. 40c, 80 (1985); received N ovem ber 2 1984 
  Published    1985 
  Keywords    Phenolic Lipids, 5-Alkenylresorcinols, Rye, Erythrocytes, Water Perm eability 
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 TEI-XML for    default:Reihe_C/40/ZNC-1985-40c-0080.pdf 
 Identifier    ZNC-1985-40c-0080 
 Volume    40