Variation in the bone calcium concentration as a function of age and sex, studied by local neutron activation in vivo
Creators
- 1. CEA, 91 - Orsay (France). Service Hospitalier Frederic Joliot
- 2. Hopital Lariboisiere, 75 - Paris (France)
Description
An original method of local activation on the hand, using isotopic neutron sources, was used to determine bone Ca and P simultaneously. The calcium concentration variation with age and sex was studied on 120 normal subjects men and women aged between 20 and 80, divided into 10 year age groups. These standards were chosen amongst subjects free from complaints liable to affect bone mineralisation and with more or less normal blood calcium and phosphorus contents. The results are as follows: between 20 and 50 the relative standard derivation observed within a 10 year age group averages 8% in men and 9% in women, after 50 this physiological scattering is much greater in both sexes, after 60 the bone calcium concentration decreases quickly in women at an average rate of 1.15% a year
Abstract (French)
On a utilise une methode originale d'activation localisee au niveau de la main, realisee a l'aide de sources isotopiques de neutrons, permettant de determiner simultanement Ca et P de l'os. L'etude de la variation de la concentration calcique en fonction de l'age et du sexe a ete menee sur un groupe de 120 sujets normaux, hommes et femmes, ages de 20 a 80 ans et repartis en tranche d'age de 10 ans. Ces temoins etaient choisis parmi des sujets indemnes d'affections susceptibles d'effectuer la mineralisation osseuse et ayant des calcemies et phosphoremies non notablement perturbees. Les resultats sont les suivants: entre 20 et 50 ans, l'ecart type relatif, observe a l'interieur d'une tranche de population correspondant a 10 annees d'age est en moyenne de 8% chez l'homme et de 9% chez la femme; apres 50 ans, cette dispersion physiologique est beaucoup plus importante aussi bien chez l'homme que chez la femme; apres 60 ans, la concentration calcique osseuse diminue rapidement chez la femme, a un rythme moyen de 1,15% par anAdditional details
Additional titles
- Subtitle (English)
- Chapter 3
- Original title (French)
- Variation de la concentration calcique de l'os en fonction de l'age et du sexe, etudiee par activation neutronique loclisee in vivo
- Original subtitle (French)
- Chapitre 3.
Publishing Information
- Publisher
- Faculte de Medecine.
- Imprint Place
- Reims, France
- Imprint Title
- 18. French language symposium on nuclear medicine. Reims, 9-12 June 1977
- Journal Page Range
- p. 6-8.
Conference
- Title
- 18. French language symposium on nuclear medicine.
- Dates
- 9 - 12 Jun 1977.
- Place
- Reims, France.
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 10483987
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ACTIVATION ANALYSIS; AGE DEPENDENCE; BONE TISSUES; CALCIUM; IN VIVO; SEX DEPENDENCE
- Descriptors DEC
- ALKALINE EARTH METALS; BODY; CHEMICAL ANALYSIS; CONNECTIVE TISSUE; ELEMENTS; METALS; TISSUES
Optional Information
- Notes
- Imprint:18. Colloque de medecine nucleaire de langue francaise. Reims, 9-12 juin 1977.