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'Spermidine' in keywords
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1994 (2)
1979 (1)
1Author    G. Eorge Sosnovsky, Jan Lukszo3Requires cookie*
 Title    Synthesis of Cross-Linked Polyamines  
 Abstract    Several synthetic approaches are explored for the preparation of polyamines which are cross-linked at the central, secondary nitrogen moiety. Diethylenetriamine, norspermidine and spermidine were used as examples. 
  Reference    Z. Naturforsch. 49b, 1580—1585 (1994); received June 9 1994 
  Published    1994 
  Keywords    Cross-Linked Polyamines, Diethylenetriamine, Norspermidine, Spermidine 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1580.pdf 
 Identifier    ZNB-1994-49b-1580 
 Volume    49 
2Author    H. Rainer, M. Aurer, Reinhard MaschlerRequires cookie*
 Title    The Influence of Spermine, Spermidine and Various Sera on T-Lymphocyte and Granulocyte Colony Growth in vitro  
 Abstract    Using T-lymphocyte (T-LC) and granulocyte colony (GC) assays with truly proliferating cells, the dose-response relationships of spermine and spermidine, of fetal calf (FCS), calf (CS), horse (HS) and human AB serum (A B S), and of the polyamines in the presence of selected does of the sera were analyzed. In contrast to earlier observations using [3H] thymidine uptake measure­ ments it was found that the polyamines as well as the sera themselves inhibit T-LC and GC growth in the presence of autologous HS and ABS, respectively. The polyamines also inhibit in the presence of additional HS and ABS, yet most effectively with added FCS and CS. Thus the previously reported species-specificity of the serum-dependent polyamine inhibition has here been shown to be more quantitative than qualitative. These studies stress the significance of assays utilizing truly dividing cells and broad dose-response relationships in order to assess specific biological effects in vitro. 
  Reference    Z. Naturforsch. 34c, 452 (1979); received January 16 1979 
  Published    1979 
  Keywords    Spermine, Spermidine, Human Serum, Lymphocyte, Granulocyte Colony Growth 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-0452.pdf 
 Identifier    ZNC-1979-34c-0452 
 Volume    34 
3Author    Kiriakos Kotzabasis, Horst SengerRequires cookie*
 Title    Free, Conjugated and Bound Polyamines during the Ceil Cycle in Synchronized Cultures of Scenedesmus obliquus  
 Abstract    The levels of free, conjugated and bound polyamines (PA) were analyzed during the cell cycle of the synchronized unicellular green alga Scenedesmus obliquus. The polyamines putrescine (PUT) and spermidine (SPD) in their free and conjugated forms accumulated per cell to a maximum in the cell cycle at about the 16 th hour after onset of illumination. The polyamines bound to macromolecules and membrane systems showed an additional peak around the 8-10 th hour of the cell cycle. The possible role of the different forms of poly­ amines in DNA replication, mitosis, cell division and development of the photosynthetic apparatus is discussed. 
  Reference    Z. Naturforsch. 49c, 181—185 (1994); received December 31993 
  Published    1994 
  Keywords    Cell Cycle, Polyamines, Putrescine, Spermidine, Scenedesmus 
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 TEI-XML for    default:Reihe_C/49/ZNC-1994-49c-0181.pdf 
 Identifier    ZNC-1994-49c-0181 
 Volume    49