Spectrophotometric Determination of Vitamins D in Presence of Vitamin A

1954 ◽  
Vol 26 (9) ◽  
pp. 1406-1409 ◽  
Author(s):  
D. T. Ewing ◽  
T. D. Schlabach ◽  
M. J. Powell ◽  
J. W. Vaitkus ◽  
O. D. Bird
Keyword(s):  
Vitamin A ◽  
Spectrophotometric Determination

Spectrophotometric Determination of Vitamin A in Fish Oils

Nature ◽  
1945 ◽  
Vol 155 (3941) ◽  
pp. 575-576
Author(s):  
W. S. METCALF
Keyword(s):  
Vitamin A ◽  
Spectrophotometric Determination ◽  
Fish Oils

Spectrophotometric Determination of Vitamin A

1940 ◽  
Vol 12 (11) ◽  
pp. 639-644 ◽  
Author(s):  
D. T. Ewing ◽  
J. M. Vandenbelt ◽  
A. D. Emmett ◽  
O. D. Bird
Keyword(s):  
Vitamin A ◽  
Spectrophotometric Determination

Spectrophotometric determination of vitamin D in presence of vitamin A

The Analyst ◽  
1964 ◽  
Vol 89 (1061) ◽  
pp. 534 ◽  
Author(s):  
R. K. Barua ◽  
M. V. K. Rao
Keyword(s):  
Vitamin D ◽  
Vitamin A ◽  
Spectrophotometric Determination

The Spectrophotometric Determination of Vitamin a Using Iodine

1973 ◽  
Vol 6 (12) ◽  
pp. 1029-1037
Author(s):  
F. Al-sulimany ◽  
Alan Townshend
Keyword(s):  
Vitamin A ◽  
Spectrophotometric Determination

Spectrophotometric determination of vitamin A in oily capsules using first derivative curves

1989 ◽  
Vol 7 (1) ◽  
pp. 39-43 ◽  
Author(s):  
Abdel-Aziz M. Wahbi ◽  
Mohammad A. Abounassif ◽  
Hussein M.G. Alkahtani
Keyword(s):  
Vitamin A ◽  
Spectrophotometric Determination ◽  
First Derivative

The spectrophotometric determination of vitamin A in fish-liver oils

The Analyst ◽  
1943 ◽  
Vol 68 (802) ◽  
pp. 8 ◽  
Author(s):  
J. I. M. Jones ◽  
R. T. Haines
Keyword(s):  
Vitamin A ◽  
Spectrophotometric Determination ◽  
Fish Liver

scholarly journals Spectrophotometric Determination of Vitamin A by Means of Chromatography.

1950 ◽  
Vol 4 ◽  
pp. 628-640 ◽  
Author(s):  
W. Hjarde ◽  
Ulla Kokkola ◽  
Lars Gunnar Sillén ◽  
Max Rottenberg
Keyword(s):  
Vitamin A ◽  
Spectrophotometric Determination

Vitamin A Value of Plant Food Provitamin A - Evaluated by the Stable Isotope Technologies

2014 ◽  
Vol 84 (Supplement 1) ◽  
pp. 25-29 ◽  
Author(s):  
Guangwen Tang
Keyword(s):  
Stable Isotope ◽  
Vitamin A ◽  
Provitamin A ◽  
Animal Origin ◽  
Plant Food ◽  
Plant Foods ◽  
A Value ◽  
Provitamin A Carotenoids ◽  
Β Carotene

Humans need vitamin A and obtain essential vitamin A by conversion of plant foods rich in provitamin A and/or absorption of preformed vitamin A from foods of animal origin. The determination of the vitamin A value of plant foods rich in provitamin A is important but has challenges. The aim of this paper is to review the progress over last 80 years following the discovery on the conversion of β-carotene to vitamin A and the various techniques including stable isotope technologies that have been developed to determine vitamin A values of plant provitamin A (mainly β-carotene). These include applications from using radioactive β-carotene and vitamin A, depletion-repletion with vitamin A and β-carotene, and measuring postprandial chylomicron fractions after feeding a β-carotene rich diet, to using stable isotopes as tracers to follow the absorption and conversion of plant food provitamin A carotenoids (mainly β-carotene) in humans. These approaches have greatly promoted our understanding of the absorption and conversion of β-carotene to vitamin A. Stable isotope labeled plant foods are useful for determining the overall bioavailability of provitamin A carotenoids from specific foods. Locally obtained plant foods can provide vitamin A and prevent deficiency of vitamin A, a remaining worldwide concern.

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