Digestibility studies on pure samples of barley, oats and wheat, with and without admixtures of oats, wheat, barley, wild oats and weed seeds, were carried out using white rats. Apparent digestibility coefficients for dry matter, crude fibre, crude protein, and energy, together with metabolizable energy values were determined for each diet. The results indicated that the individual grains and their admixtures have characteristic digestibilities. The varying additions to barley or wheat of grains other than the main grain and/or of wild oats or weed seeds reduced the digestibility of dry matter and digestible energy and likewise metabolizable energy of the admixtures. The opposite effect was obtained for the oats admixtures. A highly negative correlation between digestible dry matter and percentage crude fibre was found for the barley, oats, and wheat diets; while a highly positive correlation was found between the digestible energy and dry matter of these diets.

The results of a series of tests in which three diets composed essentially of wheat were fed to human subjects indicated that the ground wheat muffins diet and shredded wheat diet tested were probably of the same digestible energy value. These two diets were combined to form one basal diet which was fed with supplements of raw and cooked egg at three levels in a second series of tests to humans and in a third series to rats. Higher digestion values were obtained for cooked egg than for raw egg with both species. Rats digested all fractions of the basal diet but ether extract to a lesser extent than did humans. Physiological fuel values calculated from the data were compared with those of Atwater. The applicability of the latter to individual foods and to different species was questioned. Some refinements of experimental technique were suggested.

Considerable evidence has been advanced in the literature that rutin, and other vitamin P-active materials, act as antioxidants. The beneficial effect of some of these materials on vitamin C has been shown, but the results have been predominantly qualitative. This study, involving the administration of vitamin C to 128 guinea pigs, was designed to determine the extent to which rutin enhanced the apparent biological value of ascorbic acid. The odontoblast method of vitamin C bioassay was used. Rutin increased the apparent biological value of ascorbic acid by approximately 50%, when the vitamin was supplied in suboptimum amounts for normal tooth development, either in crystalline form or from a natural source. As the level of ascorbic acid intake, without rutin, approached optimum, the beneficial effect of added rutin was negligible. These results could be explained by the assumption that rutin prevented "in vivo" oxidative destruction of the administered ascorbic acid.

Several series of digestion trials with humansubjects, rats, and guinea pigs have been conducted aspilot work leading to a reinvestigation of the physiologicalfuel values of foods. Satisfactory digestioncoefficients were obtained by the index method with eachspecies when chromic oxide was ingested at each feedingin constant proportion to the dry matter intake. Asjudged by their ability to digest a wheat diet supplementedwith egg, the results of digestion trials with rats andguinea pigs may not be applied directly to human studies.

The family of animals - Bovidae (ruminants), characterized by their abillty to consume large quantities of fibrous feeds, have evolved through many millions of years into the domesticated species which today constitute one of the most important components of animal agriculture. Their specialisation as forage consumers is dependent on the capacious nature of a portion of their digestive tract (rumen), and the microorganisms living in a symbiotic relationship within this organ. It is these microflora and microfauna which are the actual converters of the cellulosic forage components into nutrients which can be absorbed and utilized by the host animal.

The purpose of the work reported was to investigate the suitability of whale meat, whale liver, cod-fish products and of a dry meal mixture for the formulation of a mink ration. Until required for feeding, all the marine products were stored frozen. Chemical examinations of the frozen feeds for keeping quality over a prolonged period of time, demonstrated that storage conditions were adequate and that the levels of vitamin E remained remarkably constant.

Diss. (sammanfattning) Stockholm : Karol. inst. / Härtill 5 uppsatser.

Thesis (Lic.)--Universidad Técnica del Norte, Facultad de Ciencias de la Salud, Escuela de Nutrición y Dietética, 2003. / Reproduced from copy at BYU's Benson Institute. Includes bibliographical references (leaf 101).

Thesis (M.S.)--University of Michigan. / Photocopy of typescript. 1968. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (Ph. D.)--Ohio State University, 1968. / Title from first page of PDF file. Document formatted into pages; contains vi, 125 p.; also includes graphics Includes bibliographical references (p. 123-125). Available online via OhioLINK's ETD Center