CALCIUM RESORPTION FROM BONE IN A HUMAN STUDIED BY CA-41 TRACING

Authors
JOHNSON RR BERKOVITS D BOARETTO E GELBART Z GHELBERG S MEIRAV O PAUL M PRIOR J SOSSI V VENCZEL E
Citation
Rr. Johnson et al., CALCIUM RESORPTION FROM BONE IN A HUMAN STUDIED BY CA-41 TRACING, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 92(1-4), 1994, pp. 483-488
Citations number
17
Categorie Soggetti
Physics, Nuclear","Nuclear Sciences & Tecnology","Instument & Instrumentation
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
92
Issue
1-4
Year of publication
1994
Pages
483 - 488
Database
ISI
SICI code
0168-583X(1994)92:1-4<483:CRFBIA>2.0.ZU;2-0
Abstract
We are investigating long- and short-term processes that involve the r esorption of the bone calcium in the human body, using accelerator mas s spectrometry of Ca-41 (T1/2 = 104 000 years). The evolution of an in jected dose of Ca-41 has been followed over 900 days by measurements i n urine and serum. The Ca-41/Ca isotopic ratio rapidly decreased after injection and after about 100 days, reached a quasi-steady state of 1 .5 x 10(-11). Variations in this level would signal a change in rates of calcium resorption from the bone.