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Author (up) Cahoon, L.B.; Halkides, C.J.; Song, B.; Williams, C.M.; Dubay, G.R.; Fries, A.S.; Farmer, J.; Fridrich, W.; Brookshire, C. doi  openurl
  Title Swine waste as a source of natural products: A carotenoid antioxidant Type Journal Article
  Year 2012 Publication Agricultural Sciences Abbreviated Journal  
  Volume 3 Issue 6 Pages 806-815  
  Keywords Swine Waste; Purple Phototrophic Bacteria; Carotenoids; Spirilloxanthin  
  Abstract Development of Environmentally Superior Tech- nologies for swine waste management has fo- cused on extraction of products with relatively low unit values. Analyses of the bacterial com- position of swine waste lagoon samples con- firmed the presence of several purple non-sulfur bacteria (PNSB) species known to produce a variety of carotenoids. We examined a carote- noid naturally abundant in North Carolina swine waste lagoons dominated by PNSB. Analytical methods including high performance liquid chromatography (HPLC), mass spectrometry, and nuclear magnetic resonance (NMR) con- firmed the identity of the dominant carotenoid as spirilloxanthin, C42H60O2, with 13 conjugated double bonds. This structure confers antioxi- dant properties as good as those of carotenoids currently marketed as antioxidants. Visual esti- mates of the “redness” of swine waste lagoon liquids were highly correlated with carotenoid content. Spirilloxanthin concentrations in a la- goon with a strong PNSB bloom were approxi- mately 0.5 grams·m−3. These results support further investigations into the potential for ex- tracting commercially valuable natural products from swine waste lagoons.  
  Corporate Author Thesis  
  Publisher SciRes Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number UMCES @ ajones @ Serial 4292  
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