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1988 (1)
1975 (1)
1Author    Gabriele Luckner, Paul RenzRequires cookie*
 Title    On the Phospholipase Activity in Bovine Seminal Vesicles and Its Possible Role in the Regulation of the Prostaglandin Biosynthesis  
 Abstract    A phospholipid mixture was isolated from bovine seminal vesicle tissue. This phospholipid pre­ paration contained the following prostaglandin precursor fatty acids: 4.7 percent 5,8,11-eicosa-trienoic acid, 9.1 percent 5,8,11,14-eicosatetraenoic acid and 0.9 percent 5,8,11,14,17-eicosa-pentaenoic acid. With this phospholipid preparation as substrate phospholipase activity could be detected in different fractions of bovine seminal vesicle cells. The highest phospholipase activity was found in the microsomal fraction, less in the mitochondria and essentially no activity in the cytosol. With a microsome preparation (acetone powder) of bovine seminal vesicles the influence of certain effectors on the phospholipase activity was investigated. Prostaglandins E2 and F2a (10 5 m) showed 19 and 41 percent inhibition, DB-c-AMP (2 x 10—9 m) 54 percent, c-AMP (1 0 ~ 9 m) 22 percent, epinephrine (10—4 m) 60 percent, testosterone (10—5 m) 25 percent inhibition of the phos­ pholipase activity. Whereas ethanol exhibits also a strong inhibition on the phospholipase activity, it shows a pronounced activation of the prostaglandin synthetase. 
  Reference    (Z. Naturforsch. 30c, 429 [1975]; received March 25 1975) 
  Published    1975 
  Keywords    Phospholipases, Phospholipids, Bovine Seminal Vesicles, Prostaglandins, Hormones 
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 TEI-XML for    default:Reihe_C/30/ZNC-1975-30c-0429.pdf 
 Identifier    ZNC-1975-30c-0429 
 Volume    30 
2Author    SamirS. Radwan, Adel-Salam Shaaban, HassanM. GebreelRequires cookie*
 Title    Arachidonic Acid in the Lipids of Marine Algae Maintained under Blue, White and Red Light  
 Abstract    Marine algae, maintained for one month under blue, white and red light were rather rich in lipids but obviously poor in fat (triacylglycerols). These lipids consisted predominantly of glyco-lipids and phospholipids. Irrespective of the light quality, the major constituent fatty acids in lipids of these algae were, in most cases, those with 20 carbon atoms. The light quality had a definite effect on the proportion of arachidonic acid in the lipids of certain algae. Thus, the proportion of arachidonic acid in Enteromorpha intestinalis maintained under white light was 45% and in Sargassum salicifolium kept under red light 25% of the total constituent fatty acids in the total algal lipids. 
  Reference    Z. Naturforsch. 43c, 15—18 (1988); received March 26/September 18. 1987 
  Published    1988 
  Keywords    Arachidonic Acid, Light Quality, Marine Algae, Prostaglandins 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0015.pdf 
 Identifier    ZNC-1988-43c-0015 
 Volume    43