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    ABSTRACT: The degenerate four-wave-mixing method is used to measure the second-order hyperpolarizabilities γ of new soluble tetrathiafulvalene (TTF) derivatives. For each material, the study of solutions at various concentrations leads to the choice of an optimum solution: a compromise between ‘low-nonlinearity low-loss’ and ‘high-nonlinearity high-loss’ solutions and thus to the determination of its susceptibility χ. The hyperpolarizabilities are deduced from these measurements; ethylenic TTF derivatives show γ values as large as −7·58 × 10 (MKS), larger than acetylenic TTF derivatives which have γ = −1·12 × 10.
    No preview · Article · Jan 2095 · Journal of Modern Optics
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    ABSTRACT: Emergence of carbapenem-resistant Acinetobacter spp. has been increasingly reported worldwide. We report here the first detection of Acinetobacter calcoaceticus isolate from vegetables in Lebanon that carrying the blaOxa-72 gene. These findings show that the Lebanese environment may constitute a potential reservoir for antibiotic resistance gene.
    Full-text · Article · Nov 2015
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    ABSTRACT: To compare severe short-term maternal and neonatal morbidity associated with midpelvic and low pelvic attempted operative vaginal delivery. Prospective study of 2,138 women with live singleton term fetuses in vertex presentation who underwent an attempted operative vaginal delivery in a tertiary care university hospital. We used multivariate logistic regression and propensity score methods to compare outcomes associated with midpelvic and low pelvic delivery. Severe maternal morbidity was defined as third- or fourth-degree perineal laceration, perineal hematoma, cervical laceration, extended uterine incision for cesarean delivery, postpartum hemorrhage greater than 1,500 mL, surgical hemostatic procedures, uterine artery embolization, blood transfusion, infection, thromboembolic events, admission to the intensive care unit, and maternal death; severe neonatal morbidity was defined as 5-minute Apgar score less than 7, umbilical artery pH less than 7.00, need for resuscitation or intubation, neonatal trauma, intraventricular hemorrhage greater than grade 2, neonatal intensive care unit admission for more than 24 hours, convulsions, sepsis, and neonatal death. From December 2008 through October 2013 there were 2,138 attempted operative vaginal deliveries; 18.3% (n=391) were midpelvic, 72.5% (n=1,550) low, and 9.2% (n=197) outlet. Severe maternal morbidity occurred in 10.2% (n=40) of midpelvic, 7.8% (n=121) of low, and 6.6% (n=13) of outlet attempts (P=.21); and severe neonatal morbidity in 15.1% (n=59), 10.2% (n=158), and 10.7% (n=21) (P=.02), respectively. Multivariable logistic regression analysis found no significant difference between midpelvic and low attempted operative vaginal delivery for either composite severe maternal (adjusted odds ratio [OR] 1.01, 95% confidence interval [CI] 0.66-1.55) or neonatal morbidity (adjusted OR 1.25, 95% CI 0.84-1.86). Similarly, propensity score matching found no significant difference between midpelvic and low operative vaginal delivery for either severe maternal (adjusted OR 0.69, 95% CI 0.39-1.22) or neonatal morbidity (adjusted OR 0.88, 95% CI 0.53-1.45). In singleton term pregnancies, midpelvic attempted operative vaginal delivery compared with low pelvic attempted operative vaginal delivery was not associated with an increase in severe short-term maternal or neonatal morbidity. II.
    No preview · Article · Jul 2015 · Obstetrics and Gynecology


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