On mycological fat production from iraqi date extract: The dibis
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Three strong fat-forming fungi, namely,Penicillium lilacinum, Penicillium soppi andAspergillus nidulans were grown on Iraqi date extract: the dibis supplemented with an external source of nitrogen in the form of asparagine, ammonium carbonate, or sodium nitrate.
Penicillium lilacinum was the slowest in growth and fat formation, but later it exceeded the two other fungi. Media supplemented with ammonium carbonate were the least conducive to growth and fat formation. Asparagine was most favorable for fat formation in case ofPenicillium lilacinum, sodium nitrate in case ofAspergillusn idulans, but in case ofPenicillium soppi, the two sources were equally good.
The use of different levels of nitrogen has shown that in case ofPenicillium lilacinum increase in nitrogen within the experimental limits was accompanied by an increase in fat yield. In case ofPenicillium soppi andAspergillus nidulans, the fat yield increased with decrease of nitrate nitrogen (increase in C:N ratio), but with asparagine, the medium concentration gave the heaviest yield.
The highest fat percentages or fat coefficients did not, however, coincide with the highest total fat yield nor with the complete exhaustion of the sugar content. It is concluded that addition of nitrogen at the proper concentration to dibis media can bring up growth and fat formation to a reasonable level. But, still, dibis as substrate for fat formation seems to be yet inferior to synthetic media favourable for fat formation.
KeywordsAsparagine Penicillium Sugar Content Medium Concentration Synthetic Medium
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- Bichkovskaya, A. L. (1940) The formation of fat by the fungusEndomyces vernalis Microbiology (Moscow) 8:1170–1180;Chem. Abstr. 42:5850 (1942).Google Scholar
- Blinc, M. &Hocevar, B. (1953) Fat enrichment inRhodotorula gracilis.Monatsh. 84:1127–1131;Chem. Abstr. 48:7104 (1954).Google Scholar
- Garrido, G. M. &Walker, T. K. (1956) Mycological Formation of Fat II. Synthesis of fat from various carbohydrates in surface cultures ofAspergillus nidulans, Penicillium javanicum, andPenicillium spinulosum and the influence of the nitrogen source on the synthesis of fat from glucose.J. Sci. Food Agric. 4:233–237.Google Scholar
- Heide, S. (1939) Zur Physiologie und Cytologie der Fettbildung beiEndomyces vernalis mit einem Beitrag zur Methodik quantitativer Bestimmung kleinster Fettmengen.Arch. Mikrobiol. 10:135–188.Google Scholar
- Ikeda, T. (1950) Production of fat by microorganisms II. Cultural conditions for fat production by a strain ofAspergillus candidus.J. Fermentation Tech. (Osaka, Japan), 28:69–73.Google Scholar
- Kaibara, T. (1948) Fat production by mould I.J. Agr. Chem. Soc. Japan, 22:89–90.Google Scholar
- Kleinzeller, A. (1948) Synthesis of lipides.Advances in Enzymol. 8:229–341.Google Scholar
- Murray, Sheilah &Walker, T. K. (1956) Mycological formation of fat III. Media conducive to formation of fat from sucrose byPenicillium soppi Zaleski in surface culture.J. Sci. Food Agric. 7:237–240.Google Scholar
- Naguib, K. (1959) Growth and metabolism ofA spergillus nidulans Eidam in surface culture.Can. J. Botany, 37:353–364.Google Scholar
- Naguib, K. &Louis, A. (1962) A preliminary study of the applicability of sweet potatoes for mycological fat production.Mycopath. et Mycol. Appl. 16:333–341.Google Scholar
- Naguib, K. &Saddik, K. (1960) Growth and metabolism ofAspergillus nidulans Eidam on different nitrogen sources in synthetic media conducive to fat formation.Can. J. Botany, 38:613–622.Google Scholar
- Naguib, K. &Walker, T. K. (1958a) Microbiological Synthesis of fat. The effects of nitrogen level on the metabolism ofPenicillium lilacinum Thom in a sucrose medium.J. exp. Bot. 9:109–114.Google Scholar
- Naguib, K. &Walker, T. K. (1958b) Microbiological Synthesis of fat. The influence of phosphate concentration on the metabolism ofPenicillium lilacinum Thom in surface culture on a sucrose medium.J. exp. Bot. 9:426–429.Google Scholar
- Pan, S. C., Andreason, A. A., &Kolachov, P. (1949) Factors influencing fat synthesis byRhodotorula gracilis.Arch. Biochem. 23:419–433.Google Scholar
- Philip, S. E. &Walker, T. K. (1958) Mycological formation of fat V. Factors which influence the formation of fat in surface cultures ofPenicillium lilacinum Thom.J. Sci. Food Agric. 9:223–227.Google Scholar
- Prill, E. A., Wenck, P. R. &Peierson, W. H. (1935) The Chemistry of mold tissue VI. Factors influencing the amount and nature of fat produced byAspergillus fischeri.Biochem. J. 29:21–33.Google Scholar
- Saïd, H. &Naguib, K. (1955) Absorption and assimilation of monosaccharides byFusarium moniliforme Sheldon.Proc. Egypt. Acad. Sci., 11:37–48.Google Scholar
- Wix, P. &Woodbine, M. (1956) Report of School of Agriculture, University of Nottingham, p. 70.Google Scholar
- Woodbine, M., Gregory, M. &Walker, T. K. (1951) Microbiological Synthesis of Fat. Preliminary survey of the fat-producing moulds.J. Exp. Bot., 2:204–211.Google Scholar