Effect of Oxygen Retained on Beet Powder on the Stability of Betanine and Vulgaxanthine I

I. SAGUY; MARIANA GOLDMAN; AYELET BORD; E. COHEN

doi:10.1111/j.1365-2621.1984.tb13679.x

Effect of Oxygen Retained on Beet Powder on the Stability of Betanine and Vulgaxanthine I

I. SAGUY^*, MARIANA GOLDMAN, AYELET BORD, E. COHEN

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

The effect of oxygen retained on beet powder on the stability of betanine and vulgaxanthine I was studied at 35°C as a function of a_w (“dry”‐0.75). moisture content, added aluminium oxide powder and headspace gases (N₂, air). Limited degradation was observed under N₂ or air and a_w± 0.41. Deterioration was accelerated at a_w± 0.52 and the presence of added Al₂O₃. This was interpreted as a lack of liquid phase mobility which retarded the reaction up to ± 0.5 a_w. Above 0.5 a_w the transition in the mechanism was related to the concentration of the dissolved 0₂ in the liquid phase, which controlled the deterioration rate. The latter was strongly affected by the added Al₂O₃. In the presence of aluminium oxide, the very fast pigment oxidation suggested a catalytic reaction.

Original language	English
Pages (from-to)	99-101
Number of pages	3
Journal	Journal of Food Science
Volume	49
Issue number	1
DOIs	https://doi.org/10.1111/j.1365-2621.1984.tb13679.x
State	Published - Jan 1984
Externally published	Yes

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title = "Effect of Oxygen Retained on Beet Powder on the Stability of Betanine and Vulgaxanthine I",

abstract = "The effect of oxygen retained on beet powder on the stability of betanine and vulgaxanthine I was studied at 35°C as a function of aw (“dry”‐0.75). moisture content, added aluminium oxide powder and headspace gases (N2, air). Limited degradation was observed under N2 or air and aw± 0.41. Deterioration was accelerated at aw± 0.52 and the presence of added Al2O3. This was interpreted as a lack of liquid phase mobility which retarded the reaction up to ± 0.5 aw. Above 0.5 aw the transition in the mechanism was related to the concentration of the dissolved 02 in the liquid phase, which controlled the deterioration rate. The latter was strongly affected by the added Al2O3. In the presence of aluminium oxide, the very fast pigment oxidation suggested a catalytic reaction.",

author = "I. SAGUY and MARIANA GOLDMAN and AYELET BORD and E. COHEN",

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AU - SAGUY, I.

AU - GOLDMAN, MARIANA

AU - BORD, AYELET

AU - COHEN, E.

PY - 1984/1

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N2 - The effect of oxygen retained on beet powder on the stability of betanine and vulgaxanthine I was studied at 35°C as a function of aw (“dry”‐0.75). moisture content, added aluminium oxide powder and headspace gases (N2, air). Limited degradation was observed under N2 or air and aw± 0.41. Deterioration was accelerated at aw± 0.52 and the presence of added Al2O3. This was interpreted as a lack of liquid phase mobility which retarded the reaction up to ± 0.5 aw. Above 0.5 aw the transition in the mechanism was related to the concentration of the dissolved 02 in the liquid phase, which controlled the deterioration rate. The latter was strongly affected by the added Al2O3. In the presence of aluminium oxide, the very fast pigment oxidation suggested a catalytic reaction.

AB - The effect of oxygen retained on beet powder on the stability of betanine and vulgaxanthine I was studied at 35°C as a function of aw (“dry”‐0.75). moisture content, added aluminium oxide powder and headspace gases (N2, air). Limited degradation was observed under N2 or air and aw± 0.41. Deterioration was accelerated at aw± 0.52 and the presence of added Al2O3. This was interpreted as a lack of liquid phase mobility which retarded the reaction up to ± 0.5 aw. Above 0.5 aw the transition in the mechanism was related to the concentration of the dissolved 02 in the liquid phase, which controlled the deterioration rate. The latter was strongly affected by the added Al2O3. In the presence of aluminium oxide, the very fast pigment oxidation suggested a catalytic reaction.

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Effect of Oxygen Retained on Beet Powder on the Stability of Betanine and Vulgaxanthine I

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