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Article
Effect of Vitamins D2 and D3 Supplement Use on Serum 25OHD Concentration in Elderly Women in Summer and Winter
Vitamin D2 and D3 are generally considered equipotent in humans. A few studies have reported that serum 25OHD levels are higher in vitamin D3- compared with vitamin D2-supplemented subjects. As both vitamin D2 an...
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Article
The Role of Calcitriol in the Treatment of Osteoporosis
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Article
Effect of Vitamin D Receptor Genotypes on Calcium Absorption, Duodenal Vitamin D Receptor Concentration, and Serum 1,25 Dihydroxyvitamin D Levels in Normal Women
It is well established that bone mineral density is under strong genetic control. Recently it was reported that the Bsm I restriction fragment length polymorphism of the vitamin D receptor (VDR) gene could ac...
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Article
Biogeography of toxic dinoflagellates in the genusAlexandrium from the northeastern United States and Canada
Twenty-eight strains of toxic dinoflagellates in the genusAlexandrium from the northeastern United States and Canada were characterized on the basis of morphology, bioluminescence capacity, mating compatibility, ...
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Article
Ecotypic differentiation in the marine diatom Skeletonema costatum: influence of light intensity on the photosynthetic apparatus
Three genetically distinct clones of Skeletonema costatum (Grev.) Cleve were grown at 20°C under high (274 μE m-2 s-1) and low (27 μE m-2 s-1) light conditions and their photoadaptive photosynthetic responses com...
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Article
Observations of sequential changes in bone mass in postmenopausal women: a controlled trial of oestrogen and calcium therapy
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Article
The effect of 1α-hydroxycholecalciferol and hormone therapy on the calcium balance of post-menopausal osteoporosis
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Article
Calcium absorption in the elderly
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Chapter
Calcium Absorption in the Elderly
Calcium absorption can be measured in at least three ways — by the balance procedure, by intubation of the small intestine with a double or triple lumen tube and by the oral administration of radioactive calcium.