| | 1 | Author
| H.A B L, D.E E | Requires 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 | |
| 2 | Author
| HaraldA B Linke, CatherineA. Chang | Requires 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 | |
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