Volatile compounds from Melicope obscura.

To evaluate the interpopulation variability of volatile compounds in Melicope obscura, four samples representing four populations were collected all over the distribution area of the species in Reunion Island (Indian Ocean). The samples were extracted by hydrodistillation, and analyzed using GC/FID and GC/MS techniques. The study revealed that, in the four essential oils obtained, oxygenated sesquiterpenes were one of the major chemical classes (9.

Using a DNA microarray to investigate the distribution of insect virulence factors in strains of photorhabdus bacteria.

Photorhabdus is an insect-pathogenic bacterium in which oral toxicity to insects is found in two distinct taxonomic groups. Using a DNA microarray and comparative genomics, we show that oral toxicity is associated with toxin complex genes tcaABC and that this locus can be mobilized or deleted within different strains.

[Prevalence, signification and prognosis of auricular arrhythmia in dilated myocardiopathies. Apropos of 236 cases].

A population of 236 patients with dilated cardiomyopathy (DCM) was studied and followed up for an average of 38.8 +/- 27 months. The most common atrial arrhythmia was atrial fibrillation (AF) which was observed in 27 p.

[Left ventricular global and segmental function in pure mitral valve prolapse with poor tolerance for exertion].

Poor effort tolerance is observed in a small percentage of cases of idiopathic mitral valve prolapse (IMVP). The aim of this study was to assess the possible left ventricular dysfunction in such cases, responsible for poor effort tolerance. Left ventricular function and segmental wall motion were studied retrospectively in a group of 17 patients with IMVP.

[Echography and parotid tumors].

Morphological criteria obtained from ultrasonic exploration of 82 parotid tumors were compared with histological findings. Precise determination was possible of the size of the tumor, its cystic or solid nature, and the pre-operative evaluation of its benign or malignant nature. In spite of certain deficiencies, the safety, rapidity of execution, and reliability of ultrasonography make it a complementary investigation of choice for all isolated nodular lesions in the parotid region before surgical exploration, which remains indispensable.