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Mycological formation of fat. II. —Synthesis of fat from various carbohydrates in surface cultures of Aspergillus nidulans , Penicillium javanicum and Penicillium spinulosum and the influence of the nitrogen source on the synthesis of fat from glucose
Author(s) -
Garrido J. M.,
Walker T. K.
Publication year - 1956
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740070401
Subject(s) - xylose , penicillium , aspergillus nidulans , chemistry , food science , sodium nitrate , sucrose , sugar , ammonium nitrate , pentose , butterfat , fermentation , biochemistry , organic chemistry , milk fat , linseed oil , mutant , gene
Next to glucose (and excluding comparison with sucrose) the sugar most effective as a substrate for fat‐production by these moulds was xylose. The highest rate of fat synthesis from xylose was achieved by Penicillium javanicum which in 9 days metabolized 21.40 g. to produce 4.61 g. of felt containing 1.24 g. of fat while, in the same time, Aspergillus nidulans consumed 7.86 g. of xylose and developed 3.61 g. of felt containing 0.69 g. of fat. The latter mould had a fat coefficient (g. fat/g. xylose utilized) of 8.8; that of P. javanicum , which was 5.8, indicates a less economical conversion. Ammonium nitrate was the best source of nitrogen for all three moulds; sodium nitrate was also very suitable for A. nidulans .