Results 161 to 170 of about 4,601 (217)
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Influence of molecular structure of astaxanthin esters on their stability and bioavailability
Food Chemistry, 2021The stability and bioavailability of fourteen astaxanthin esters (Asta-Es) with different molecular structures were investigated using in vitro and in vivo digestion models. The results demonstrated that Asta-E with long-chain and saturated fatty acids were more stable than other types of Asta-E.
Lu Yang +6 more
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Stabilized Nanoemulsions of Astaxanthin Esters of Known Fatty-Acid Composition
Pharmaceutical Chemistry Journal, 2020The aim of the present study was to develop astaxanthin ester nanoemulsions with phosphatidylcholine and evaluate their stability during storage under various conditions. Monoesters were obtained by column chromatography of an oil extract of Haematococcus pluvialis and mixed astaxanthin esters. Monoester fatty-acid compositions were determined by HPLC.
I. S. Kulikova +3 more
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Journal of Agricultural and Food Chemistry, 1998
The reaction kinetics for the hydrolysis of astaxanthin esters and the degradation of astaxanthin during saponification of the pigment extract from the microalga Haematococcus pluvialis were investigated. Different concentrations of sodium hydroxide in methanol were used for the saponification under nitrogen in darkness at ambient temperature (22 ...
Chen, F, Yuan, JP
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The reaction kinetics for the hydrolysis of astaxanthin esters and the degradation of astaxanthin during saponification of the pigment extract from the microalga Haematococcus pluvialis were investigated. Different concentrations of sodium hydroxide in methanol were used for the saponification under nitrogen in darkness at ambient temperature (22 ...
Chen, F, Yuan, JP
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Journal of Separation Science, 2005
AbstractHPLC atmospheric pressure chemical ionization (APCI)/MS, GC MS, HPLC diode array detection (DAD), and NMR were used for the identification of astaxanthin and astaxanthin fatty acid esters in krill (Euphausia superba Dana). Matrix solid phase dispersion was applied for the extraction of the carotenoids.
Marc David, Grynbaum +6 more
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AbstractHPLC atmospheric pressure chemical ionization (APCI)/MS, GC MS, HPLC diode array detection (DAD), and NMR were used for the identification of astaxanthin and astaxanthin fatty acid esters in krill (Euphausia superba Dana). Matrix solid phase dispersion was applied for the extraction of the carotenoids.
Marc David, Grynbaum +6 more
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Journal of the Science of Food and Agriculture, 2020
AbstractBACKGROUNDAstaxanthin (Asta) is widely used in the nutraceutical and food industry because of its strong antioxidant properties. However, natural Asta mainly exists in the esterified form with various fatty acid chains, making it difficult to understand the particular molecular structure of astaxanthin esters (Asta‐Es) that have better ...
Lu Yang +6 more
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AbstractBACKGROUNDAstaxanthin (Asta) is widely used in the nutraceutical and food industry because of its strong antioxidant properties. However, natural Asta mainly exists in the esterified form with various fatty acid chains, making it difficult to understand the particular molecular structure of astaxanthin esters (Asta‐Es) that have better ...
Lu Yang +6 more
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Food Chemistry, 2021
The influence of different fatty acid carbon chains on the kinetic interactions of nanocomplexes between esterified astaxanthin (E-Asta) and β-lactoglobulin (β-Lg) were investigated by multi-spectroscopy and molecular modeling techniques. We synthesized ten different E-Asta bound to β-Lg and formed nanocomplexes (< 300 nm).
Xing Qiao +6 more
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The influence of different fatty acid carbon chains on the kinetic interactions of nanocomplexes between esterified astaxanthin (E-Asta) and β-lactoglobulin (β-Lg) were investigated by multi-spectroscopy and molecular modeling techniques. We synthesized ten different E-Asta bound to β-Lg and formed nanocomplexes (< 300 nm).
Xing Qiao +6 more
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Journal of the Science of Food and Agriculture, 2018
AbstractBACKGROUNDIn this paper, the changes in free astaxanthin (F‐AST) and astaxanthin esters (AST‐Es) in Litopenaeus vannamei during iced storage and frozen storage were investigated. The liquid chromatography–atmospheric pressure chemical ionization tandem mass spectrometry method was used to quantify the molecular species of AST‐Es in shrimp ...
Xing Qiao +6 more
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AbstractBACKGROUNDIn this paper, the changes in free astaxanthin (F‐AST) and astaxanthin esters (AST‐Es) in Litopenaeus vannamei during iced storage and frozen storage were investigated. The liquid chromatography–atmospheric pressure chemical ionization tandem mass spectrometry method was used to quantify the molecular species of AST‐Es in shrimp ...
Xing Qiao +6 more
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Astaxanthin ester as a prosthetic group: A carotenoprotein from the hermit crab
Comparative Biochemistry and Physiology, 1966Abstract 1. 1. It has been shown that a purple pigment isolated from the eggs and ovaries of the hermit crab (Eupagurus bernhardus L.) has absorption maxima at 280, 465, 495 and 580 mμ and is a carotenoprotein. 2. 2. Analysis of the carotenoids in the eggs has shown the presence of β-carotene, free and esterified astaxanthin.
D F, Cheesman, J, Prebble
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Food Chemistry, 2000
The purification method including extraction, saponification, and separation was established for preparing free trans-astaxanthin from a high-yielding astaxanthin ester-producing strain of the microalga Haematococcus pluvialis which contained 3.67% trans-astaxanthins and 1.35% cis-astaxanthins of the dry cells.
Yuan, JP, Chen, F
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The purification method including extraction, saponification, and separation was established for preparing free trans-astaxanthin from a high-yielding astaxanthin ester-producing strain of the microalga Haematococcus pluvialis which contained 3.67% trans-astaxanthins and 1.35% cis-astaxanthins of the dry cells.
Yuan, JP, Chen, F
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Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, 2002
The composition of the fatty acids of astaxanthin esters and the distribution of astaxanthin optical RS isomers in the esterified and unesterified astaxanthin fractions extracted from the meal of the pelagic red crab langostilla (Pleuroncodes planipes; Decapoda, Anomura) were determined.
Gladis Nancy, Coral-Hinostroza +1 more
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The composition of the fatty acids of astaxanthin esters and the distribution of astaxanthin optical RS isomers in the esterified and unesterified astaxanthin fractions extracted from the meal of the pelagic red crab langostilla (Pleuroncodes planipes; Decapoda, Anomura) were determined.
Gladis Nancy, Coral-Hinostroza +1 more
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