caa a22 4500 386322384 CHVBK 20180307111631.0 cr unu---uuuuu 161130e198805 xx s 000 0 eng 10.1079/BJN19880053 doi S0007114588000558 pii (NATIONALLICENCE)cambridge-10.1079/BJN19880053 The β-carotene-rich alga Dunaliella bardawil as a source of retinol in a rat diet [Elektronische Daten] 1. Dunaliella bardawil, a β-carotene-accumulating alga, has been tested as a source of retinol and β-carotene in a diet given to rats. The β-carotene in this alga is composed of about equal amounts of the 9-cis and all-trans isomers. Male weanling rats were fed on a retinol-deficient diet for 60 d. Thereafter, the rats were divided into groups and fed on a diet deficient in retinol or supplemented with retinol, synthetic β-carotene, dry alga or an algal oil-extract. Following further growth for 7 d, samples were taken for liver analyses of retinol, retinol isomers and β-carotene. 2. Liver analyses revealed a comparable content of retinol and normal conversion rates in the rats grown on the diets supplemented with synthetic or natural β-carotene. Rats fed on the alga and the algal-oil-supplemented diets accumulated 9-cis retinol in addition to the all-trans isomer. Rats fed on synthetic β-carotene, alga and algal oil had a liver retinol: β-carotene value of about 3:1. 3. These studies demonstrate the possibility of using dried D. bardawil or an oil extract of the alga as a dietary natural β-carotene supplement which satisfies the total requirement of retinol in rats. 4. Rats fed on alga or on algal oil, accumulated in the liver 9-cis β-carotene and all-trans β-carotene in a ratio similar to that present in the alga. Copyright © The Nutrition Society 1988 Ben-Amotz A. Israel Oceanographic and Limnological Research, Tel-Shikmona, PO Box 8030, Haifa 31080, Israel Mokady S. Department of Food Engineering and Biotechnology, Technion, Haifa 32000, Israel Avron M. Biochemistry Department, The Weizmann Institute of Science, Rehovot 76100, Israel British Journal of Nutrition Cambridge University Press 59/3(1988-05), 443-449 0007-1145 59:3<443 1988 59 BJN https://doi.org/10.1079/BJN19880053 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1079/BJN19880053 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ben-Amotz A. Israel Oceanographic and Limnological Research, Tel-Shikmona, PO Box 8030, Haifa 31080, Israel NATIONALLICENCE 700 1- Mokady S. Department of Food Engineering and Biotechnology, Technion, Haifa 32000, Israel NATIONALLICENCE 700 1- Avron M. Biochemistry Department, The Weizmann Institute of Science, Rehovot 76100, Israel NATIONALLICENCE 773 0- British Journal of Nutrition Cambridge University Press 59/3(1988-05), 443-449 0007-1145 59:3<443 1988 59 BJN CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge