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Factors affecting the stability and estimation of carotene in artificially dried grass and hays

Published online by Cambridge University Press:  27 March 2009

S. K. Kon  and
S. Y. Thompson
S. K. Kon
Affiliation:
The National Institute for Research in Dairying, University of Reading
S. Y. Thompson
Affiliation:
The National Institute for Research in Dairying, University of Reading
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Extract

1. The influence of storage in the light and in the dark at ordinary temperature and in a heated room at 70–80° F. on the carotene content of finely ground artificially dried grass stored in paper sacks and jute sacks was studied. There was an initial drop in carotene content from 61·1 to 46·5 mg./100 g., i.e. 23·9%, in the first month, and a total loss of 31·4% during 6 months' storage (August to February). No difference could be detected either between treatments or types of containers.

2. There was a marked loss of carotene during 13 months' storage of baled artificially dried grass and of hays, amounting to 30–40% of the original value.

3. Two methods of estimating carotene were compared. The method of Ferguson & Bishop (1936) gave higher results than the method of Peterson, Hughes & Freéman (1937). The difference is probably due to incomplete extraction in the latter method.

4. Chromatographic analyses of “carotene” fractions from the above grasses showed the presence of coloured impurities amounting to 20·5–33·8% of the total recovered pigments.

5. As these impurities are biologically inactive, chromatographic analysis or the use of special solvents are probably necessary for the accurate determination of carotene in forage.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 30 , Issue 4 , October 1940 , pp. 622 - 638
Copyright
Copyright © Cambridge University Press 1940

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References

REFERENCES

Bartlett, S., Henry, K. M., Kon, S. K., Osborne, L. W., Thompson, S. Y. & Tinsley, J. (1938). Biochem. J. 32, 2024.CrossRefGoogle Scholar
Camburn, D. M., Ellenberger, H. B. & Crooks, G. C. (1939). J. Dairy Sci. 22, 456.Google Scholar
Ferguson, W. S. & Bishop, G. (1936). Analyst, 61, 515.CrossRefGoogle Scholar
Fraps, G. S. & Kemmerer, A. R. (1937). Bull. Tex. agric. Exp. Sta. no. 557.Google Scholar
Fraps, G. S. & Kemmerer, A. R. (1939). J. Ass. off. agric. Chem. 22, 190.Google Scholar
Gillam, A. E. & El Ridi, M. S. (1936). Biochem. J. 30, 1735.CrossRefGoogle Scholar
Guilbert, H. R. (1934). Industr. Engng Chem. (Anal, ed.), 6, 452.Google Scholar
Guilbert, H. R. (1935). J. Nutrit. 10, 45.Google Scholar
Hayden, C. C., Perkins, A. E., Krauss, W. E., Monroe, C. F. & Washburn, R. G. (1937). Bim. Bull. Ohio agric. Exp. Sta. 22, 21.Google Scholar
Hegsted, D. M., Porter, J. W. & Peterson, W. H. (1939). Industr. Engng Chem. (Anal, ed.), 11, 256.Google Scholar
Kane, E. A. & Shinn, L. A. (1935). J. biol. Chem. 109, xlviii.Google Scholar
Kane, E. A., Wiseman, H. G., Hartman, A. H. & Cary, C. A. (1936). J. Dairy Sci. 19, 466.Google Scholar
Moon, F. E. (1938 a). J. Soc. chem. Ind. 57, 457.Google Scholar
Moon, F. E. (1938 b). J. Soc. chem. Ind. 57, 455.Google Scholar
Moon, F. E. (1939). J. agric. Sci. 29, 295.Google Scholar
Munsey, V. E. (1938). J. Ass. off. agric. Chem. 21, 331.Google Scholar
Munsey, V. E. (1939). J. Ass. off. agric. Chem. 22, 664.Google Scholar
Peterson, W. H., Bird, H. R. & Beeson, W. M. (1937). J. Dairy Sci. 20, 611.Google Scholar
Peterson, W. H., Bohstedt, G., Bird, H. R. & Beeson, W. M. (1935). J. Dairy Sci. 18, 63.CrossRefGoogle Scholar
Peterson, W. H., Hughes, J. S. & Freeman, H. F. (1937). Industr. Engng Chem. (Anal, ed.), 9, 71.Google Scholar
Quackenbush, F. W., Steenbock, H. & Peterson, W. H. (1938). J. Amer. chem. Soc. 60, 2937.Google Scholar
Russell, W. C., Taylor, M. W. & Chichester, D. F. (1934). Bull. N.J. agric. Exp. Sta. no. 560.Google Scholar
“Student“ (1908). Biometrika, 6, 1.Google Scholar
“Student“ (1925). Metron, 5, 105.Google Scholar
Taylor, M. W., Russell, W. C. & Bender, C. B. (1939). J. Dairy Sci. 22, 591.Google Scholar
Virtanen, A. I. (1933). Biochem. Z. 258, 251.Google Scholar
Wilder, O. H. M. & Bethke, R. M. (1938). Bull. Ohio agric. Exp. Sta. no. 592.Google Scholar
Willstaedt, H. & With, T. K. (1938). Hoppe-Seyl. Z. 253, 40.CrossRefGoogle Scholar
Wiseman, H. G., Kane, E. A., Shinn, L. A. & Cary, C. A. (1938). J. agric. Res. 57, 635.Google Scholar