منابع مشابه
Decomposition and Analysis of Carthamin in Safflower - Dyed Textiles
Carthamin from safflower petals has been used for centuries in Asia as a red colorant for dyes and cosmetics. Carthamin is unstable, however, both in hot, aqueous solutions, which causes difficulties in its analysis in textiles, and to light, which results in fading of dyed textiles. We have found, using HPLC and mass spectrometric analysis, that carthamin undergoes a reverse aldol condensation...
متن کاملThe Tinctorial Stability of Carthamin on Polysaccharides and Related Substances
Various saccharides and related substances were mixed with carthamin in aqueous solutions and their effects on red colour stability compared. At a low temperature range (5 °C), monoand disaccharides contributed to preservation of the carthamin red colouration. No monoand disaccharides could relieve carthamin from being bleached at a high temperature (30 °C). Among poly saccharides and their de...
متن کاملEnzymatic conversion of precarthamin to carthamin by a purified enzyme from the yellow petals of safflower.
Precarthamin, a yellow precursor of carthamin, was efficiently isolated from the yellow petals of safflower (Carthamus tinctorius L. ) with Sephadex LH-20 column chromatography and preparative HPLC, and identified with UV-vis and NMR spectrometry. The UV-vis spectrum of precarthamin showed lambda(max) of 238 and 406 nm in MeOH. The molar extinction coefficients of precarthamin at 406 nm in MeOH...
متن کاملAcceleration of Enzyme-Dependent Carthamin Formation by Manganese with Diversed Valence States
Effect of manganese with three different valence states on carthamin formation was studied by using freshly collected flowers from dyer’s saffron ( C. tinctorius) capitula. At 1 10 hm con centration, these cations accelerated markedly the carthamin formation induced by endoge nous enzyme(s) in the detached floral tissues. The acceleration was obviously dependent on the valence state of the te...
متن کاملPreparation of an Enzyme Associated with Carthamin Formation in Carthamus tinctorius L
Koshi Saito, Yoshiyuki Takahashi, and Mizu Wada Department of Applied Chemistry, Faculty of Engineering, Tokai University, 1117 Kitakaname, Hiratsuka-shi, Kanagawa-ken 259-12, Japan Z. Naturforsch. 40c, 819-826 (1985); received August 12, 1985 Carthamin Synthesis, Safflower Seedling, Catalytic Property An enzyme associated with carthamin formation in Carthamus tinctorius L. (carthamin-synthesiz...
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ژورنال
عنوان ژورنال: NIPPON KAGAKU KAISHI
سال: 1930
ISSN: 0369-4208,2185-0909
DOI: 10.1246/nikkashi1921.51.237