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Biomedical subjects

J L Miquel

Publications and source records attributed to J L Miquel.

At least 19 recordsLinked to original sources
PubMed1995

Hydroxyl groups in bone mineral.

The question of whether the apatite crystals of bone contain hydroxyl groups was explored using magic angle spinning, proton nuclear magnetic resonance spectroscopy, and resolution enhanced Fourier transform infrared spectroscopy. The powdered bone samples were heated at 300 degrees C in air, in CO2 at 4 bar atmosphere, and at 300 degrees C in air and subsequently at 300 degrees C in CO2, to eliminate the effects of water tightly bound to the crystals and to prevent the degradation of carbonate groups and the elimination of potentially present OH groups. Results confirm earlier findings that bone apatite crystals do not contain detectable amounts of hydroxyl ions.

Animals↗
PubMed1990

[How can we organize the fight against H.I.V.?].

The aim of this article is to highlight the different ways of fighting against H.I.V. With AZT, using peptide T, the author has looked at the latest theories and research being undertaken and their respective successes. He reminds us that the AIDS vaccination is not to be found tomorrow.

CD4 Antigens↗
PubMed1990

[Descriptive and technical study of dental inlays in pre-Colombian Mexico].

The authors presents, in this paper, a study on dental inlays among Mexican pre-Colombians. To begin with, from the study sources, systematization, classification and some characteristics were extracted, being the best method for later being able to study the descriptive and technical aspects of these inlays while insisting on the quality of the cement used.

Cementation↗
PubMed1989

[An orodental epidemiologic survey conducted in the school environment in the Great Southwest of France].

Within the framework of a national epidemiological study, a regional study of the oral conditions of a representative survey of 1174 schoolchildren aged 6 to 15 years, was conducted in the south-west Region of France. This Region studied by the Dental School of Bordeaux comprised the departments of Dordogne, Gironde, Landes, Lot-et-Garonne, Pyrénées-Atlantiques, Charente and Charente-Maritime. Only 8.8% of the 15 years old children were caries free. The mean DMFT was 4.3 at age 12 years whereas the mean DMFS at the same age was 6.6. At the age of 15, these indices reached respectively the values of 6.5 and 11.4. The most affected sites were the pits and fissures, followed by the approximal and smooth surfaces (respectively 59.3%, 25.4% and 15.3% at age 15). The plaque index varied only slightly around 0.9, whereas the calculus index increased regularly from 0.0 to 0.4 between the ages of 6 to 15 years. The gingival index, which was 0.1 at age 6, remained stable around 0.3 between 8 and 15 years of age.

Adolescent↗