Showing papers by "P.J. Van Soest published in 1990"
TL;DR: Dietary fibers are not uniform, chemically or in their nutritive and biological properties, the only common ground being their resistance to mammalian digestive enzymes.
Abstract: Dietary fibers are not uniform, chemically or in their nutritive and biological properties, the only common ground being their resistance to mammalian digestive enzymes. The AOAC method for total fiber is subject to inferences from ash, protein, tannins and resistant starches. These interferences can be reduced by urea enzymatic dialysis. The measurement of soluble and insoluble fiber is nutritionally relevant, since physical properties greatly modify dietary effects of fiber. Insoluble fiber is conveniently measured as neutral-detergent fiber. This procedure has been improved by reducing the starch interference and the time of analysis. Physical and biological properties of dietary fiber can be measured by using relevant procedures for hydration capacity, metal ion exchange capacity and rate of fermentation. The lignin and tannin content modify the characteristics of dietary fiber.
41 citations
TL;DR: Responses such as the Gompertz and logistic for describing the cumulative disappearance of potentially degradable substrate during in-sacco and in-vitro incubation are described.
33 citations
TL;DR: In this paper, a detergent system for analysis of cell wall components to whole ground cotyledons was applied to whole kidney beans for eight months under three storage conditions: 0°C, 30°C - 80070 RH, and 40°C-80070 RH.
Abstract: Red kidney beans were stored for eight months under three storage conditions: 1) 0°C; 2) 30°C - 80070 RH; 3) 40°C - 80070 RH. Hardness of cooked whole beans from treatments 2 and 3 increased during storage. Application of the detergent system for analysis of cell wall components to whole ground cotyledons showed significant increases in cell wall content, cell wall nitrogen and hemicellulose for cotyledons of treatment 3. These increases were highly correlated with hardness of cooked beans. Acid detergent residue, lignin and cellulose contents of cotyledons did not change in any of the treatments. The synthesis of nitrogen containing compounds in cell walls during adverse storage may be a contributing factor in the development of hardness by hindering dissolution of the middle lamella during cooking.
13 citations
TL;DR: Efficient use of existing feed resources may enhance economical livestock production in the humid lowlands of Venezuela by using less mature forage was always more profitable than mature grass.
9 citations