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P F Ceccaldi

Publications and source records attributed to P F Ceccaldi.

At least 19 recordsLinked to original sources
PubMed1989

[100 years of identification (from man to his genome)].

It is a set of descriptive features or traits characterising an individual that serves as the basic for the identification of his person. Some of these traits are of interest mainly in police investigations; others, of which the interest is more particularly scientific, are rapidly gaining recognition. Anthropometric methods enable the identification of recidivist criminals. Anthropometric description is based on bone measurements taken in conjunction with the spoken portrait and recorded distinguishing marks--the features concretely represented in the descriptive photograph. This method was first supplemented and then supplanted, both for description and identification, by dactyloscopy. Investigations involving corpses are often extremely difficult. Several facts concerning bone and/or teeth could be relevant in determining the race, sex, height and age of the person whose remains are examined. Traces and stains as "clues" of hereditary and congenital properties of blood (erythrocytic, enzymatic, plasmic and leucocytic systems, factors and groups) and of sperm (with, in this case, secretor and non secretor properties) do provide and increasingly precise description of an individual but only a certain degree of probability for his identification; at best, they can only exclude an individual, but cannot prove his involvement. A knowledge of the patterns of the nucleotides in the Deoxyribo Nucleic Acids, which are the same in all the cells of an individual but differ from individual to individual, provides an ultimate means of arriving at certainty in the comparison: samples-suspect.(ABSTRACT TRUNCATED AT 250 WORDS)

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PubMed1981

[Contribution to hair medulla study (author's transl)].

In this study, the authors aim to bring to light the anatomical characteristics of the medullary cells of hairs and to examine the evolution of these characteristics according to the mammals genuses. Previous studies of the morphogenesis of the medullary cells have shown that the cytoplasm of the medulla would turn amorphous while microfibrils are formed in the cytoplasm of the inner root sheath. The medulla and the inner root sheath are sulfur-poor but are rich in citrulline and the proteins are bound by epsilon(gammaglutamyl)lysine dipeptides. Our observations, both anatomical and ultrastructural, with the SEM and the TEM, have showed that the medullary cell is also evolved and complex that the others hairs cells. Furthermore, we have observed that the medullary cell content of some mammal's hairs is amorphous, as was shoôn in previous works; but it seems to evolve towards a biphasic phase (or granular) in superior mammals while the medullary cells of the hairs of human and closely related anthropoids contain macrofibrils and microfibrils. Medullary microfibrils are similar to those of the inner root sheath of the hair and therefore, we now understand why citrulline and epsilon(gammaglutamyl)lysine bonds are also found in the medullary cells.

Animals↗