Calcium carbonate (calcite) as a separate phase besides calcium phosphate apatite in medullary bone of laying hens (original) (raw)

Abstract

Guinier diagrams of pulverized medullary bone samples of one-year-old layers (HNL) showed, apart from apatite-like lines typical for bone, other reflexions which are characteristic of calcite and thus confirm the presence of calcium carbonate as a separate phase. The role that calcite possibly plays in mobilization of minerals during egg shell formation is discussed. It is emphasized that quantitative determination of calcite turnover in laying hens is still required.

Résumé

De l'os médullaire pulvérisé de poules hybrides âgées d'un an a été examiné á l'aide de la diffraction des rayons X (méthode de Guinier). A côté des reflets apatitiques typiques pour l'os, les diffractogrammes ont montré nettement des reflets surnuméraires qui correspondent au calcite et confirment ainsi la présence de carbonate de calcium comme phase séparée. Dans la discussion de l'importance possible du calcite dans la mobilisation des minéraux pendant la formation des coques des œufs, il s'est montré nécessaire de déterminer quantitativement le métabolisme calcique dans le squelette des poules.

Zusammenfassung

Guinier-Aufnahmen von pulverisiertem medullary bone einjähriger Hybridlegehennen (HNL) zeigten neben den für Knochen typischen apatitartigen Reflexen deutlich weitere Linien, die dem Calcit zugeordnet sind und damit die Präsenz von Calciumcarbonat als Separatphase bestätigen. Die mögliche Bedeutung des Calcits bei der Mobilisation von Mineralien während der Eischalenbildung wird besprochen und auf die Notwendigkeit hingewiesen, den Calcit-Umsatz im Legehennenskelett quantitativ zu bestimmen.

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Authors and Affiliations

1. Forschungsgruppe für Mikromorphologie im Fritz-Haber-Institut (Max-Planck-Gesellschaft), Berlin
   Heinrich Newesely
2. Institut für Tierzucht und Tierernährung der Freien Universität Berlin, Brümmerstr. 34, Berlin-Dahlem
   Konrad Lörcher

Authors

1. Konrad Lörcher
2. Heinrich Newesely

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Gratefully dedicated to Prof. Dr.E. Hayek (Innsbruck/Austria) on his 65th birthday.

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Lörcher, K., Newesely, H. Calcium carbonate (calcite) as a separate phase besides calcium phosphate apatite in medullary bone of laying hens.Calc. Tis Res. 3, 358–362 (1969). https://doi.org/10.1007/BF02058678

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• Received: 16 December 1968
• Issue date: December 1969
• DOI: https://doi.org/10.1007/BF02058678

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