Comparative study and histomorphometric analysis of bone allografts lyophilized and sterilized by autoclaving, gamma irradiation and ethylene oxide in rats

PURPOSE: To compare three sterilization methods (autoclave, gamma irradiation and ethylene oxide) over non demineralized lyophilized bone allografts. METHODS: Bone allografts were implanted on paravertebral muscles of 21 rats. After 30 days animals were sacrificed and grafts underwent comparative analysis regarding histomorphometric and macroscopic parameters. RESULTS: Allografts that underwent the three sterilization methods presents similar weight gain, cortical thickness similar to control group, and less fibrosis than the control group. Grafts that underwent sterilization in autoclave presented less presence of multinucleated giant cells, although not statistically significant. There was also no statistically significant difference regarding mineralization on the three groups. CONCLUSION: The three sterilization methods cause similar effects on bone allografts regarding macroscopic and histomorphometric parameters

Natureza dos deuses e divindade da natureza: reflexões sobre a recepção antiga e moderna do antropomorfismo divino grego

A dificuldade em admitir-se o antropomorfismo dos deuses aparece na Grécia a partir da época arcaica, com os primeiros textos em prosa dos pensadores pré-socráticos. Neste estudo definirei as principais características dessa reflexão crítica sobre os limites do antropomorfismo, bem como a recusa dos intérpretes modernos em aceitar o antropomorfismo grego como uma experiência religiosa autêntica. Alguns fragmentos de Heráclito de Éfeso serão citados como exemplo da sabedoria dos jônios na época arcaica.<br>The difficulty in admitting divine anthropomorphism appears in Greece from the archaic epoch onwards with the first prose texts of the pre-Socratic thinkers. In this study I will define the main characteristics of this critical reflexion about the limits of anthropomorphism, as well as the modern scholars' refusal to accept it as an authentic religious experience. Some fragments of Heraclitus of Ephesus will be cited as an example of the Ionian wisdom of the archaic epoch