Abstract
Spectroscopic and electron microscopic studies of lutein dispersed in aqueous solutions of the bile acids, sodium cholate (CA), sodium deoxycholate (DCA), and sodium chenodeoxycholate (CDCA) were done. The bile acids caused the lutein molecules to form water-soluble aggregates of right-handed helices, which gave characteristic ellipticities in the wavelength range of 350-450 nm. The molar ellipticity of lutein increased during aggregation. The ellipticities of lutein wax maximum at about 26 mM CA, 3 mM DCA, and 7 mM CDCA. The maximum ellipticity of lutein in CA was larger than those in the two other bile acids. This means that CA makes more regular lutein aggregate than DCA or CDCA. The binding ratio of CA to lutein was estimated to be 1000-3000 mol/mol, but that of DCA to lutein was 80 mol/mol. In the CA solution, large rod-shaped lutein aggregates 1.5-3μm long and 0.2-0.8μm in diameter were observed under the electron microscope. Small spherical particles 0.3μm in diameter adhered to the lutein aggregates. The number of these particles increased as the CA concentration increased, indicating that they were CA micelles. Therefore, lutein seemed to interact with the CA micelles.
| Original language | English |
|---|---|
| Pages (from-to) | 1055-1060 |
| Number of pages | 6 |
| Journal | Nippon Nogeikagaku Kaishi |
| Volume | 67 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1993 |
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ASJC Scopus subject areas
- Biotechnology
- Chemistry (miscellaneous)
- Medicine (miscellaneous)
- Food Science
Cite this
Spectroscopic Analysis and Electron Microscopic Observation of Lutein Dispersed in Bile Acid Solutions. / Takagi, Shigeaki; Ito, Takayuki; Nakajima, Akio; Kimura, Yoshinobu; Takeda, Kunio.
In: Nippon Nogeikagaku Kaishi, Vol. 67, No. 7, 1993, p. 1055-1060.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Spectroscopic Analysis and Electron Microscopic Observation of Lutein Dispersed in Bile Acid Solutions
AU - Takagi, Shigeaki
AU - Ito, Takayuki
AU - Nakajima, Akio
AU - Kimura, Yoshinobu
AU - Takeda, Kunio
PY - 1993
Y1 - 1993
N2 - Spectroscopic and electron microscopic studies of lutein dispersed in aqueous solutions of the bile acids, sodium cholate (CA), sodium deoxycholate (DCA), and sodium chenodeoxycholate (CDCA) were done. The bile acids caused the lutein molecules to form water-soluble aggregates of right-handed helices, which gave characteristic ellipticities in the wavelength range of 350-450 nm. The molar ellipticity of lutein increased during aggregation. The ellipticities of lutein wax maximum at about 26 mM CA, 3 mM DCA, and 7 mM CDCA. The maximum ellipticity of lutein in CA was larger than those in the two other bile acids. This means that CA makes more regular lutein aggregate than DCA or CDCA. The binding ratio of CA to lutein was estimated to be 1000-3000 mol/mol, but that of DCA to lutein was 80 mol/mol. In the CA solution, large rod-shaped lutein aggregates 1.5-3μm long and 0.2-0.8μm in diameter were observed under the electron microscope. Small spherical particles 0.3μm in diameter adhered to the lutein aggregates. The number of these particles increased as the CA concentration increased, indicating that they were CA micelles. Therefore, lutein seemed to interact with the CA micelles.
AB - Spectroscopic and electron microscopic studies of lutein dispersed in aqueous solutions of the bile acids, sodium cholate (CA), sodium deoxycholate (DCA), and sodium chenodeoxycholate (CDCA) were done. The bile acids caused the lutein molecules to form water-soluble aggregates of right-handed helices, which gave characteristic ellipticities in the wavelength range of 350-450 nm. The molar ellipticity of lutein increased during aggregation. The ellipticities of lutein wax maximum at about 26 mM CA, 3 mM DCA, and 7 mM CDCA. The maximum ellipticity of lutein in CA was larger than those in the two other bile acids. This means that CA makes more regular lutein aggregate than DCA or CDCA. The binding ratio of CA to lutein was estimated to be 1000-3000 mol/mol, but that of DCA to lutein was 80 mol/mol. In the CA solution, large rod-shaped lutein aggregates 1.5-3μm long and 0.2-0.8μm in diameter were observed under the electron microscope. Small spherical particles 0.3μm in diameter adhered to the lutein aggregates. The number of these particles increased as the CA concentration increased, indicating that they were CA micelles. Therefore, lutein seemed to interact with the CA micelles.
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UR - http://www.scopus.com/inward/citedby.url?scp=33644568397&partnerID=8YFLogxK
U2 - 10.1271/nogeikagaku1924.67.1055
DO - 10.1271/nogeikagaku1924.67.1055
M3 - Article
AN - SCOPUS:33644568397
VL - 67
SP - 1055
EP - 1060
JO - Nippon Nogeikagaku Kaishi
JF - Nippon Nogeikagaku Kaishi
SN - 0002-1407
IS - 7
ER -