A wide range of minerals is essential for human health. The recommended dietary allowances (RDAs) serve as guidelines for daily intakes of nutrients that population groups in the United States should have in their diets. Dietary Reference Intakes (DRIs) have been established for the following essential minerals: calcium, phosphorus, and magnesium. In addition, DRIs have been set for other trace...

Nondigestible oligosaccharides may increase mineral absorption by changing the intestinal environment. The effect of feeding a diet containing 5% resistant starch, RS2 (uncooked native) or RS3, (cooked and retrograded) on calcium absorption and bone mineral status was studied in growing male rats for 4 weeks. Almost 100g more feed was consumed with resistant starch compared to control in four w...

background: sound is one of the most important factors threatening workers’ health. the most efficient and practical method for controlling noise pollution is the use of sound-absorbing materials. impedance tube with two microphones is used to determine the sound absorption coefficients and should be tested periodically for accuracy and efficiency. the purpose of present study was assessing the...

generally, only a fraction of the mineral ingested by an animal is effectively absorbed, while most are bound to other components such as fibre and then excreted. in this study, faecal mineral composition differentials were used as indicators of mineral uptake by pullets supplemented varying levels of plantain ash in their daily rations for nine weeks. plantain stalk and root base samples were ...

Mineral nutrition research in recent years has focused on reducing mineral excretion; however, very little work has focused on accurate determination of mineral requirements. To more accurately define and understand mineral requirements, it is essential that a better understanding of mineral absorption mechanisms and their regulation be achieved. This is particularly important because the cost ...

Cryptomys hottentotus has no access to dietary or endogenous sources of cholecalciferol (D,). Serum concentrations of calcifediol (25(OH)D,) were undetectable ( < 5 ng/ml) and calcitriol (1,25(OH),D3), although detectable in plasma, was at a low concentration (31.40 (SEM 3.06 pglml). Despite their naturally impoverished vitamin D status, these animals exhibited highly efficient mineral absorpti...

Cryptomys hottentotus has no access to dietary or endogenous sources of cholecalciferol (D3). Serum concentrations of calcifediol (25(OH)D3) were undetectable (< 5 ng/ml) and calcitriol (1,25(OH)2D3), although detectable in plasma, was at a low concentration (31.40 (SEM 3.06 pg/ml). Despite their naturally impoverished vitamin D status, these animals exhibited highly efficient mineral absorptio...