Huiles essentielles de six espèces xérophyles d'Eucalyptus: effet du milieu sur les rendements et la composition chimique

Les huiles essentielles (HE) de six espèces xérophyles d'Eucalyptus plantées dans deux zones de la région denMarrakech (Jbilet et Takerkoust) ont été examinées. Les espèces étudiées ont donné des rendements relativement intéressants. Pour l'E.salmonophloia il a atteint 5%. 41 composés ont été identifiés par chromatographie en phase gazeuse. Le cinéole reste le composé majoritaire de la plupart des huiles essentielles analysées: sa teneur varie entre 40 et 70%. Le rendement en HE, ainsi que la composition chimique de ces dernières varient d'une espèce à une autre et d'un milieu à un autre. Les échantillons prélevés dans la zone de Jbilet sont mieux pourvus en p-cymène et en spathulénol. Ceux récoltés dans la zone de Takarkoust présentent en revanche des teneurs en a-pinène et en bornéol nettement plus élevées. Le taux du 1,8-cinéole ne présente pas de variations importantes entre les régions étudiées pour les échantillons de la mâme espèce.Essential oils of six xerophyl Eucalyptus species: effect of location on the yield and the chemical compositionThe essential oils of six xerophyl Eucalyptus species, planted in two sites of Marrakech region (Jbilet and Takerkoust) have been analysed. The studied species gave interestingyields. For E.salmonophloia the essential oil content reached 5%. 41 components have been identified by gas chromatography. The cineol stays the major compound of the most analysed essential oils: its content varies between 40 and 70%. The essential oil yield and the chemical composition vary within the species and the location. The samples 'taken in the Jbilet site are richer in p-cymene and spathulenol. Those harvested in the site ofTakerkoust have, however, high contents of a-pinene and borneol. The content of cineol does'nt change significantly, from a site to an other, for the same species

Come scrivere un articolo scientifico = How to write a scientific paper

The present paper is meant to provide a checklist to write a good scientific manuscript. Before writing, you need to carefully think about the message you are trying to convey: that is exactly what the reader will focus on and the reason why he/she will keep on reading your paper. For the same reason, the title should both describe your study and raise interest. Start with a general outline, collecting ideas and considerations. Then, you can focus on the paper itself, which has to be divided into different sections, following the IMRaD format. The Introduction concerns the background, the problem and the aim of your study; in the Material and Methods section you will describe how you have performed your research; the Results section will report the data, while you will discuss how your results answer and support your research question in the Discussion section. Publishing your manuscript means you can share your research and your results: that is why you must pay so much attention to produce a well-conceived article

Cough peak flow as a predictor of pulmonary morbidity in patients with dysphagia

OBJECTIVE: The aim of this study was to ascertain whether an objective cough measure relates to the risk of pulmonary complications in dysphagic patients with persistent tracheobronchial aspiration. DESIGN: This is a retrospective observational study involving 55 dysphagic patients who underwent a modified barium swallow study and pulmonary function tests including cough peak flow measurement. The results were compared between subjects with and without pulmonary complications because of aspiration. RESULTS: The 18 patients (33%) with pulmonary complications had significantly lower mean cough peak flow values (202.2 \ub1 68.8 vs. 303.9 \ub1 80.7 liters/min; P < 0.001) than those without pulmonary complications. The finding of tracheobronchial coating in a modified barium swallow was not related to the occurrence of pulmonary morbidity. Receiver operating characteristic curve analysis showed that a CPF level lower than 242 liters/min predicted the development of pulmonary complications with a sensitivity of 77% and a specificity of 83%; the positive and negative predictive values were 65% and 90%, respectively. CONCLUSIONS: Our findings indicate that cough peak flow is a valuable predictor of respiratory prognosis in chronic aspiration. This finding suggests a new rehabilitation strategy aimed at improving cough flows for dysphagic patients