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red pigments
It was demonstrated that subcultivated callus tissue contained red pigments of flavonoid nature.
      
Under stress cultivation conditions, yellow pigments were formed and the content of red pigments increased.
      
Yellow, orange, and red pigments are found to have absorption spectra typical of C40-carotenoids.
      
The chromophore composition of all known phycoerythrins of cyanobacteria and red algae were compared, and on the basis of this comparative study designations C1- to C5-phycoerythrin were proposed for cyanobacterial red pigments.
      
The formation of soluble Monascus red pigments is strongly positively and negatively regulated by different amino acids.
      
The new pigments derived from the hydrophobic leucine were more hydrophilic than the conventional red pigments (lacking an amino acid side-chain) and were extracellularly produced.
      
Therefore, the low level of red pigments produced when leucine was the nitrogen source was not due to feed-back regulation by cell-bound leucine pigments.
      
The highly radioresistant Rubrobacter radiotolerans, contains red pigments.
      
The relative spectral response of anatase and haematite in the Raman data is compared with that of anatase and other red pigments such as minium, cinnabar, and litharge.
      
A simple, routine-method is given for the quantitative evaluation of the total yellow and red pigments respectively of red paprika, from the two-peaks spectral curves of the total extract.
      
Studies on the antioxidative activity of red pigments in Italian-type dry-cured ham
      
Lipophilic and hydrophilic extracts of the red pigments from Parma ham and nitrosylated pigment of dry-cured ham produced with nitrite salt were prepared with acetone/water (75/25?v/v?%) solution and aqueous phosphate buffer, respectively.
      
Under these conditions 43.42?mg of Acys from 100?g of fresh fruits (TAcy, expressed as cyanidin-3-glucoside), approximately 98.33% of the total red pigments, could be obtained by MAE.
      
We found that the formation of red pigments in this strain, measured by optical density at 500 nm (OD500) was strongly stimulated by monosodium glutamate (MSG) as the sole nitrogen source.
      
The highest red pigment production was obtained using a glucose-peptone medium at pH 6.5, due to the secretion of red pigments into the medium under these conditions.
      
Negative effect of ammonium nitrate as nitrogen source on the production of water-soluble red pigments by Monascus sp.
      
Hairy roots cultured on Murashige and Skoog solid medium did not produce any red pigments.
      
However, the hairy roots cultured in Root Culture solid or liquid media produced a large amount of red pigments, which were released to the medium.
      
, which are capable of producing red pigments, have been established.
      
Thin-layer chromatography, high-performance liquid chromatography and 1 H nuclear magnetic resonance analyses revealed that the red pigments which accumulated on the cultured shoots were shikonin derivatives.
      
 

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