Titlebook: Calcium Metabolism, Bone and Metabolic Bone Diseases; Proceedings of the 1 Friedrich Kuhlencordt (Professor of Internal Medic Conference pr

坦白

Limitations in Bone-Mass Measurements with 241Am high energy of .Am-radiation is the decrease in difference between mass absorption-coefficients of water and hydroxyapatite with a factor 2/3 compared with that of .I (OMNELL, 1957). Therefore it was feared that the precision of the measured parameter (the bone-mass per unit of bone-length) would be reduced considerably by this loss of contrast.

神圣在玷污

dowagers-hump

表脸

不满分子

Extrarenal Metabolism of High Doses of 25-(OH)-D3: a New Active Metaboliteigher than 125 nmoles. In order to analyze this action of 25-(OH)-D. further we investigated a possible extrarenal conversion of 25-(OH)-D. into more polar active metabolites. This investigation led to the revelation of a new metabolite termed X., which possesses biological activity.

aplomb

合法

蔓藤图饰

A Time-Varying Model for Calcium Metabolism Including Diurnal Variationsring, they were in common based on both mathematical procedures and physiological data which require to be reconsidered to-day. Recently, three of the authors reported that, in the rat, plasma calcium fluctuates following a clear circadian rhythm (PERAULT-STAUB et al., 1973). Our present study inclu

mendacity

On Calcium Metabolism during Immobilizationretion of calcium in the urine and feces increased, resulting in a negative calcium balance. This has been confirmed by among others, MACK (1965), ROSE (1966) and LYNCH et al. (1967), and a corresponding loss of calcium from the skeleton has been demonstrated through densitometric measurements (MACK

BARB

Limitations in Bone-Mass Measurements with 241Aminvestigations on femoral head-necrosis (RÖSINGH, et al., 1972) it was decided to undertake work in this direction. The investigations of SORENSON and CAMERON (1967) seemed a reliable starting point. However, .I shows insufficient penetration of γ-radiation (27.4 KeV) in heavy parts of extremities.