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From page 86... ... THE EFFECT OF STORAGE OF GRAINS ON THEIR NUTRITIVE VALUE Greatly increased quantities of grain stored during recent years, due to surplus production and to the Federal establishment of the Ever- normal Granary, emphasize the importance of the question relating to the possible effect of such storage on the value of the grain for use as food for human consumption and feed for animal production, as well as for industrial utilization. If deterioration does occur it is highly important to know the nature and extent of the changes, since such knowledge is fundamental to the adoption of corrective measures that may be taken with respect to methods and conditions of storage whereby deterioration may be reduced to a minimum, as well as to the best ways of utilizing stored products that may have become damaged with respect to certain of their properties. Read the entire page →
From page 87... ... carbohydrate content and a modification of the physical properties of the gluten. Grain, resembling spelt, over 3,000 years old, taken from an ancient tomb in Egypt, was tested by Geddes? Read the entire page →
From page 88... ... measurable chemical changes until the deterioration of the grain is well advanced. The cereal fats, on the other hand, break down rapidly during the early stages of grain deterioration, and the free fatty acids liberated by this process contribute materially to the titratable acidity of extracts of the grain. Read the entire page →
From page 89... ... VITAMINS Vitamin A Evidence from a number of different sources shows defi- nitely that storage and aging of corn and other material results in very material destruction of vitamin A potency. Read the entire page →
From page 90... ... would indicate possibly a reduction in 8-carotene percentage. Figures for new corn were found very close to the averages given by Fraps and Kemmerer * Read the entire page →
From page 91... ... dence that this diseased condition can be brought about by a vitamin A deficiency in the ration, and that it can be cured by vitamin A therapy."® This disease is manifested by loss of appetite, lameness, marked swelling of subcutaneous tissues, defective vision, particularly night blindness. In advanced cases serous fluid oozes from the tissues, which may drop from the carcass even after 24 hours' refrigeration. Read the entire page →
From page 92... ... of the carotene had disappeared still had the same riboflavin content as is usually found in alfalfa-leaf meal. Cabell and Ellis, Bureau of Animal Industry, United States Depart- ment of Agriculture (unpublished data) Read the entire page →
From page 93... ... Similar studies on soybeans, whole and ground,®* showed the same types of changes in the proteins resulting from storage as were found in the case of wheat and wheat flour. Read the entire page →
From page 94... ... than that for rats fed the fresh unstored material. The average weight of rats fed meal that had been stored for 24 months remained essentially the same as for those fed meal stored for 12 months. Read the entire page →
From page 95... ... wheat that had been stored for 4 to 5 years in experimental bins of various types in Iowa, Kansas, and North Dakota were studied chemi- cally in the same manner as were the small samples stored under con- trolled conditions in the laboratory. Because of lack of data on the solubility, digestibility, and other chemical properties of the proteins when the grains were placed in the storage bins, the extent of any changes that may have occurred during the storage periods can not be estimated. Read the entire page →
From page 96... ... Carotene content and that of other carotenoid pigments signifi- cantly decrease on aging and storage with the consequent loss of vitamin A activity. Thiamine (B,) Read the entire page →
From page 97... ... possible, because the effects of aging develop rapidly during the early stages. Rather extensive grain storage studies are now in progress as a cooperative project among several agencies of the United States Department of Agriculture and several State Agricultural Experiment Stations. Read the entire page →
From page 98... ... I A Q B w W N pa l Oo Oo 0 ah m k mt O n R o R R I O me oOo eo Tz Q Q te ps S R E B B E S 8B B N B R E BS REFERENCES . Greaves, J Read the entire page →
From page 99... ... e s s . Report of Southern Regional Research Laboratory, Bureau of Agricultural and Industrial Chemistry, U Read the entire page →
From page 102... ... The National Research Council Membership and Organization. -- The National Research Council is a cooperative organization of scientific men of America, including also a representation of men of affairs interested in engineering and industry and in the basic sciences upon which the applications of science depend. Its membership is largely composed of accredited representatives of about eighty-five national scientific and technical societies. Read the entire page →

From page 86...

... THE EFFECT OF STORAGE OF GRAINS ON THEIR NUTRITIVE VALUE Greatly increased quantities of grain stored during recent years, due to surplus production and to the Federal establishment of the Ever- normal Granary, emphasize the importance of the question relating to the possible effect of such storage on the value of the grain for use as food for human consumption and feed for animal production, as well as for industrial utilization. If deterioration does occur it is highly important to know the nature and extent of the changes, since such knowledge is fundamental to the adoption of corrective measures that may be taken with respect to methods and conditions of storage whereby deterioration may be reduced to a minimum, as well as to the best ways of utilizing stored products that may have become damaged with respect to certain of their properties.