Phytic acid, as myoinositol hexaphosphate, (mgm/100gm) found in each product was; 2860 in a glanded flour, 4290 in a glandless flour, 3350 in an air-classified glandless flour, and 2490 in toasted seed kernels. The glandless flour was significantly higher in phytic. acid than the glanded flour (5% level), and than the seed kernels (1% level). The glanded flour was the only product that did not exhibit phytase activity. Inorganic phosphorous released (mgm x 10⁻³, per 50 mgm of product); were: 63.4 for the air-classified glandless flour, 41.4 for the kernels, 38.7 for the glandless flour, and less than 1.0 for the glanded flour. The amount of inorganic phosphate released by the glandless air-classified flour during enzyme activity was significantly higher at the 1% level than the amounts released by either the glandless flour or the toasted kernels. No other significant differences were found at the 5% level between the amounts of inorganic phosphorous released by the other products demonstrating enzyme activity. The amounts of these cottonseed products recommended for use in a recipe formulations are not enough for their phytic acid content to be of nutritional significance. The amount of phytic acid ingested with the kernels when they are used as a snack food may be cause for some concern. / Graduation date: 1973

xi, 128 leaves : ill. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Agricultural Biochemistry and Soil Science, 1973

Thesis (Ph.D.) -- University of Adelaide, Dept. of Agricultural Biochemistry and Soil Science, 1973.

Thesis (M.S.)--University of Wisconsin--Madison, 1983. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 75-85).

No description available.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1916. / Typescript. With this is bound: The phytic acid of the wheat kernel and some of its salts / By P.W. Boutwell. Reprinted from Journal of the American Chemical Society, vol. XXXIX, no. 3 (Mar. 1917), p. [491]-503. Includes bibliographical references.

published_or_final_version / abstract / Biological Sciences / Master / Master of Philosophy

Two feeding trials were conducted to evaluate the effects of dietary phytic acid contents and removal of phytate from plant protein sources on growth and utilization of phosphorus, zinc and iron in juvenile cobia. In experimental I, test diets were formulated by adding phytic acid, 0, 5, 10, 15 and 20 g/kg diet to the basal diet that used fish meal and wheat gluten as the protein source. Juvenile cobia with an initial weight of 20g were fed the test diets for 8 weeks. No significant difference among fish groups was found in percent weight gain, feed conversion ratio, protein efficiency, net protein utilization and body composition. Dietary phytic acid level significantly affected zinc concentrations in body, vertebra, serum and feces. Body zinc concentration in fish fed diet containing 2% phytic acid was 10.2% lower than the control group. Vertebra and serum zinc concentrations decreased with increasing dietary phytic acid levels, vertebra zinc concentration in fish fed diet containing 2% phytic acid was 22.3% lower than the control group. The dietary phytic acid concentration was positively related to the fecal zinc concentration. In experimental II, nine isonitrogenous, isolipid and isocaloric diets were formulated including control diet that contained 421g/kg fish meal, and four test diets with fish meal protein in control diet being replaced by 40 or 50% with soybean meal or by 30% or 40% with canola meal respectively. Another four test diets used dephytinized soybean or canola meal after phytase treatments removed 90.9~94.6% of phytate. Juvenile cobia with an initial weight of 94g were fed the test diets for 8 weeks. Growth, feed conversion ratio, protein efficiency and net protein utilization of fish fed diets containing plant proteins were poorer than control group. Better weight gain, feed conversion ratio and net protein utilization were observed in those groups fed diets contained soybean meal rather than canola meal. Ash, phosphorus, zinc and iron contents of whole body and vertebra in cobia fed phytase-pretreated plant protein were not significantly different from groups of fish fed raw plant protein. In conclusion, dietary phytic acid reduced the zinc bioavailability. Performance of cobia as well as diet quality indicated that soybean meal as the better alternative protein source for fish meal than canola meal. Dephytinization had no positive effect on utilization of phosphorus, zinc and iron in juvenile cobia.

No description available.

Thesis (M. Phil.)--University of Hong Kong, 2008. / Also available in print.