New fluorocarbon iodides.

A general, efficient approach for the synthesis of fluorocarbon iodides and di-iodides bearing hydrocarbon groups is described and the synthetic utility of these new systems is demonstrated in reactions with thiols.

[Lipid peroxidation in the presence of inorganic compounds. Relation to oxidative stress mechanisms]. / Peroxydation lipidique en présence de composés inorganiques. Relation avec les mécanismes du stress oxydant.

Oxidizing activity study of inorganic compounds is based on a mechanistic approach. This approach implies research of the capacity of these materials, after interaction with molecular oxygen, to generate activated oxygen species (AOS) in aqueous medium. These electrophilic species are able to participate in oxidative stress processes and some AOS differ in their oxidizing power; highly oxidizing species (A*) and entities (P*) less oxidizing than A*. These AOS are capable of initiating linolenic acid peroxidation leading to formation of different degradation products such MDA, monoaldehydes, conjugated dienes and trienes, hydroperoxydes, and ethane. The detection of these products allows to reveal the presence of AOS. Our data show that the global assessment of lipid peroxidation should be established from the whole of formed peroxidation products and not from one type of degradation products.

[Value and limits of research on Mycoplasma hominis and Ureaplasma urealyticum in the gastric fluid of newborn infants]. / Intérêt et limites de la recherche de Mycoplasma hominis et Ureaplasma urealyticum dans le liquide gastrique des nouveau-nés.

Mycoplasma hominis and Ureaplasma urealyticum were cultured and counted in the gastric fluid of 153 neonates divided into three groups: 28 preterm neonates managed in an intensive care unit (Group I); 83 full term neonates with suspected infection (Group II); and 42 full term neonates with no evidence of infection (Group III). The colonization rate (17.85%) in the intensive care unit group was not significantly different from the rates seen in the two other groups. These results do not militate against the pathogenic role of the two organisms studied but rather suggest a contributory role of other factors.

[Value and limitations of the research of Mycoplasma hominis and Ureaplasma urealyticum in gastric fluid in newborn infants]. / Intérêt et limites de la recherche de Mycoplasma hominis et Ureaplasma urealyticum dans le liquìde gastrique des nouveau-nés.

Mycoplasma hominis and Ureaplasma urealyticum were cultured and counted in the gastric fluid of 153 neonates divided into three groups: 28 preterm neonates managed in an intensive care unit (Group I); 83 full term neonates with suspected infection (Group II); and 42 full term neonates with not evidence of infection (Group III). The colonization rate (17.85%) in the intensive care unit group was not significantly different from the rates seem in the two other groups. These results do not militate against the pathogenic role of the two organisms studied but rather suggest a contributory role of other factors.

Studies on surface properties of asbestos. IV. Catalytic role of asbestos in fluorene oxidation.

To determine whether asbestos is a basic catalyst, catalytic oxidation of fluorene to fluorenone in a heterogeneous system was tested. It was shown that oxidation was quantitatively possible on the surface of all basic minerals, such as asbestos (chrysotile and crocidolite) and magnesia, but was not possible with acidic mineral materials such as silica. The effects of different factors are discussed.