Crystallinity of human pineal calcospherulites |
| |
| Authors: | Kazimierz Ostrowski Anna Dziedzic-Goclawska Jacek Michalik Waclaw Stachowicz Slawomir Mazur |
| |
| Affiliation: | (1) Department of Histology and Embryology, School of Medicine, Chalubinskiego Street 5, 02-004 Warsaw, Poland;(2) Department of Transplantology, School of Medicine, Chalubinskiego Street 5, 02-004 Warsaw, Poland;(3) Department of Radiation Chemistry, Institute of Nuclear Research, Warsaw, Poland |
| |
| Abstract: | ![]()
Summary Crystallinity of mineral in human pineal calcospherulites was determined by electron spin resonance spectrometry after irradiation of the samples with gamma rays in a60Co-source. The radiation-induced stable paramagnetic centers in the crystalline lattice of hydroxyapatite crystals were used as a marker of the crystalline fraction and related to the total mineral content. The crystallinity of pineal sand is higher than that of compact bone. The numerical value of the crystallinity coefficient depends on both the average crystal size of hydroxyapatite and the percentage of the crystalline fraction in the total amount of mineral. Literature data show that the average size of hydroxyapatite crystals in pineal sand are smaller than in bone tissue. It is, therefore, concluded that the higher crystallinity of pineal acervuli is due to the lower percentage of the submicrocrystalline fraction in their mineral. |
| |
| Keywords: | Pineal gland Crystallinity of mineral Pineal sand Electron spin resonance |
| 本文献已被 SpringerLink 等数据库收录！ |
|
