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1991 (1)
1976 (1)
1Author    G. Kulandaivelu, D. 0. HallRequires cookie*
 Title    Stabilization of the Photosynthetic Activities of Isolated Spinach Chloroplasts during Prolonged Ageing  
 Abstract    Isolated spinach chloroplasts (type A complete) were used to study the changes in the pnoto-chemical activities upon storage in order to establish optimum conditions for prolonged storage. Chloroplasts stored at — 5 °C were found to retain over 70% of their photosynthetic electron transport from H20 even after 5 days. Increases in the level of state 2 electron transport (due to uncoupling) with concomitant loss of state 3 phosphorylation activity was observed during the initial period of ageing. Addition of 1% bovine serum albumin decreased the level of uncoupling and maintained the phosphorylation activity for a longer period. Chloroplasts stored at 77 °K main­ tained their phosphorylation capacity for a period of 10 days even after repeated freezing and thawing. Photosystem I activity was found to be more stable over the whole ageing period of 15 days. Loss of plastoquinone may be responsible for the decrease in electron transport between photosystems II and I. 
  Reference    (Z. Naturforsch. 31c, 452 [1976]; received August 22 1975/March 11 1976) 
  Published    1976 
  Keywords    Ageing, Stabilization, Photosynthetic Activities, Chloroplasts 
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 TEI-XML for    default:Reihe_C/31/ZNC-1976-31c-0452.pdf 
 Identifier    ZNC-1976-31c-0452 
 Volume    31 
2Author    Ch Heyde, M. WenzelRequires cookie*
 Title    Schweres Wasser (D 20 ) als Protektivum proteinhaltiger Arzneimittel. Beispiel: humane Cholinesterase Protein Drugs Stabilized by Heavy W ater (D 20 ). For Example: Hum an Cholinesterase  
 Abstract    Looking for a possible protective effect o f heavy water on proteins, Cholinesterase and lac­ tate dehydrogenase in com bination with D 20 and further protective substances were exposed to a temperature o f 60 °C (for 10 min) and about 45 °C (for several days). In combination with glycerine there resulted an additive protective effect; with NaCl and/or albumin being added the individual effects raised to a higher level. In the cold D 20 protects Cholinesterase only against acid denaturation, but in com bination with warmth also against basic dena-turation. 
  Reference    Z. Naturforsch. 46c, 789—7 (1991); eingegangen am 19. Februar 1991 
  Published    1991 
  Keywords    Heavy Water, Protein Drugs, Stabilization, Com binations, Cholinesterase 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0789.pdf 
 Identifier    ZNC-1991-46c-0789 
 Volume    46