Contribution à l’étude de l’huile essentielle de Dipcadi serotinum (l.) Medik du Maroc

Dipcadi serotinum (L.) Medik, est une plante de la famille des Hyacinthaceae, elle est largement utilisée comme réchauffant et aussi pour combattre la jaunisse. Cette plante trouve une large utilisation par la population de la région côtière du Maroc. À notre connaissance l’huile essentielle de cette espèce n’a jamais été étudiée ni chimiquement ni biologiquement. Dans ce contexte, nous avons mené une étude comparative de l’huile essentielle extraite de la partie aérienne et la partie souterraine. Les résultats obtenus pour les rendements et la composition chimique de l’huile essentielle des deux parties étudiés montrent des différences considérables.Mots-clés : Dipcadi serotinum (L.) Medik, huile essentielle, composition chimique, médecine traditionnelle, Maroc.Contribution to the study of the essential oil of Dipcadi serotinum (l.) Medik of MoroccoDipcadi serotinum (L.) Medik, is a plant of the Hyacinthaceae’s family, it is widely used as warming and also to combat the jaundice. This plant is widespread use by the population of the coastal region of Morocco. To our knowledge the essential oil of this species has never been studied or chemically or biologically. In this context, we conducted a comparative study of the essential oil extracted from the aerial part and underground part. The results for yield and chemical composition of essential oil from both sides studied showed significant differences.Keywords : Dipcadi serotinum (L.) Medik, essential oil, chemical composition, traditional medicine, Morocco

Bounded point evaluations for cyclic Hilbert space operators

[EN] In this talk, to be given at a conference at Seconda Università degli Studi di Napoli in September 2001, we shall describe the set of analytic bounded point evaluations for an arbitrary cyclic bounded linear operator T on a Hilbert space H and shall answer some questions due to L. R. Williams.This research is supported in part by the Abdus Salam ICTP, Trieste, Italy.Bourhim, A. (2003). Bounded point evaluations for cyclic Hilbert space operators. Applied General Topology. 4(2):301-316. doi:10.4995/agt.2003.2035.SWORD3013164

Endothelial mineralocorticoid receptor activation enhances endothelial protein C receptor and decreases vascular thrombosis in mice

Previous studies have shown that aldosterone, which activates the mineralocorticoid receptor (MR), promotes thrombosis in animal models. Our objective was to determine whether MR activation/expression in the vascular endothelium could modify thrombotic risk in vivo and to examine thrombin generation at the surface of aortic endothelial cells (HAECs). MR was conditionally overexpressed in vivo in vascular endothelial cells in mice (MR-EC mice) or stimulated with aldosterone in HAECs. Thrombosis after ferric chloride injury was delayed in MR-EC mice compared with controls as well as in wild-type FVB/NRj mice treated with aldosterone (60 mug/kg/d for 21 d). Thrombin generation in platelet-poor plasma did not differ between MR-EC mice and controls. In MR-EC mice, aortic endothelial cell protein C receptor (EPCR) expression was increased. Aldosterone (10(-8) M) attenuated thrombin generation at the surface of cultured HAECs, and this effect was associated with up-regulation of expression of EPCR, which promotes formation of activated protein C. Aldosterone increases EPCR expression via a transcriptional mechanism involving interaction of MR with the specificity protein 1 site. These findings demonstrate that MR activation acts on endothelial cells to protect against thrombosis in physiological conditions and that MR-mediated EPCR overexpression drives this antithrombotic property through enhancing protein C activation

AfriMTE and AfriCOMET : Empowering COMET to Embrace Under-resourced African Languages

Despite the progress we have recorded in scaling multilingual machine translation (MT) models and evaluation data to several under-resourced African languages, it is difficult to measure accurately the progress we have made on these languages because evaluation is often performed on n-gram matching metrics like BLEU that often have worse correlation with human judgments. Embedding-based metrics such as COMET correlate better; however, lack of evaluation data with human ratings for under-resourced languages, complexity of annotation guidelines like Multidimensional Quality Metrics (MQM), and limited language coverage of multilingual encoders have hampered their applicability to African languages. In this paper, we address these challenges by creating high-quality human evaluation data with a simplified MQM guideline for error-span annotation and direct assessment (DA) scoring for 13 typologically diverse African languages. Furthermore, we develop AfriCOMET, a COMET evaluation metric for African languages by leveraging DA training data from high-resource languages and African-centric multilingual encoder (AfroXLM-Roberta) to create the state-of-the-art evaluation metric for African languages MT with respect to Spearman-rank correlation with human judgments (+0.406)

LOCAL SPECTRA OF OPERATOR WEIGHTED SHIFTS

Abstract. In this note, we study the local spectral properties of unilateral operator weighted shifts. 1

© Hindawi Publishing Corp. ON THE LARGEST ANALYTIC SET FOR CYCLIC OPERATORS

We describe the set of analytic bounded point evaluations for an arbitrary cyclic bounded linear operator T on a Hilbert space �; some related consequences are discussed. Furthermore, we show that two densely similar cyclic Banach-space operators possessing Bishop’s property (β) have equal approximate point spectra. 2000 Mathematics Subject Classification: 47A10, 47A11, 47B20

ON THE LOCAL SPECTRAL PROPERTIES OF WEIGHTED SHIFT OPERATORS

Abstract. In this paper, we study the local spectral properties for both unilateral and bilateral weighted shift operators. 1