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1977 (1)
1976 (1)
1975 (2)
1Author    H.A B L, D.E ERequires cookie*
 Title    Facile Synthesis of the Chalcones and Dihydrochalcones from Naringin, Neohesperidin and Hesperidin  
 Abstract    The flavanone glycosides naringin, neohesperidin and hesperidin were converted chemically to the corresponding chalcones and dihydrochalcones; the one-step synthesis, performed at room temperature, required the presence of 25% K O H in the reaction mixture for the former and 10% K O H , a catalyst and molecular hydrogen at atmospheric pressure for the latter. 
  Reference    (Z. Naturforsch. 30b, 606—608 [1975]; received April 1 1975) 
  Published    1975 
  Keywords    Dihydrochalcones, Sweeteners, Flavanone Glycosides, U V Spectra, Hydrogenation 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0606.pdf 
 Identifier    ZNB-1975-30b-0606 
 Volume    30 
2Author    HaraldA B Linke, CatherineA. ChangRequires cookie*
 Title    Physiological Effects of Sucrose Substitutes and Artificial Sweeteners on Grow th Pattern and A cid Production of Glucose-Grown Streptococcus mutans Strains in vitro  
 Abstract    The synergistic effects of four sucrose substitutes, polysorbate and five artificial sweeteners were studied in vitro on growth pattern and acid production of seven glucose-grown Streptococcus mutans strains, representing the five serological groups after Bratthall. Four distinct growth pat­ terns during glucose fermentation were observed: high rate of growth with low acid production, moderate growth rate with moderate acid production, moderate growth rate with high acid pro­ duction, and slow rate of growth with moderate acid production. Depending on the strain used, the final OD at 546 nm ranged from 0.55 to 0.99 and the final pH of the medium varied between 4.65 and 4.15. While added sucrose substitutes, with exceptions, usually enhanced growth rate, most artificial sweeteners suppressed or, at higher concentrations, even inhibited growth of S. mutans-, addition of polysorbate to the medium always increased growth rate of S. mutans signifi­ cantly. The presence of sucrose substitutes during glucose fermentation had no effect on final pH of the medium, but addition of artificial sweeteners, especially sodium saccharin, elevated final pH up to 1.8 units. The observed physiological patterns and differences within the several strains of S. mutans during glucose fermentation in vitro do not necessarily relate to the five serological groups of the species. 
  Reference    (Z. Naturforsch. 31c, 245 [1976]; received February 5 1976) 
  Published    1976 
  Keywords    Streptococcus mutans, Sweeteners, Caries, Polysorbate, Saccharin 
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 TEI-XML for    default:Reihe_C/31/ZNC-1976-31c-0245.pdf 
 Identifier    ZNC-1976-31c-0245 
 Volume    31 
3Author    H. Arald, A. B. LinkeRequires cookie*
 Title    Growth Inhibition of Glucose-Grown Cariogenic and Other Streptococci by Saccharin in vitro  
 Abstract    Sodium saccharin in concentrations from 0.02 to 20.00 m g/m l inhibits the in vitro growth of glucose-grown cariogenic and other streptococci, and suppresses, esp. at the higher concentration range, the ferm entative acid production of these m icroorganism s to acid levels much lower than the critical pH of 5.5. These observations indicate a possible caries antagonism by saccharin. 
  Reference    (Z. Naturforsch. 32c, 839 [1977]; received May 9 1977) 
  Published    1977 
  Keywords    Streptococcus m utans, Saccharin, Caries, Sweeteners, Streptococci 
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 TEI-XML for    default:Reihe_C/32/ZNC-1977-32c-0839.pdf 
 Identifier    ZNC-1977-32c-0839 
 Volume    32 
4Author    H., A.B L, E. E.Requires cookie*
 Title    Dihydrochalcones and Chalcones of Some Flavanone Glycosides: Qualitative and Quantitative Determinations  
 Abstract    The chalcones and dihydrochalcones of the flavanone glycosides naringin, neohesperidin and hesperidin were separated and identified by thin-layer chromatography; a similar procedure was utilized to perform preparative TLC for purification of these compounds. A new spectrophotometric method for the quantitative determination of dihydrochalcones in the concentration range from 0.005 to 0.100% in aqueous or alcoholic solution is described as well as a detection method of these compounds in agar media for micro­ biological studies. 
  Reference    (Z. Naturforsch. 30b, 940—942 [1975]; received June 19 1975) 
  Published    1975 
  Keywords    Dihydrochalcones, Flavanone Glycosides, Sweeteners, Thin-layer Chromatography, Quantitative Analysis 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0940.pdf 
 Identifier    ZNB-1975-30b-0940 
 Volume    30