Recurrence of suicide attempt in adolescents lost to contact early by clinicians: The 10-year REPEATERS cohort of French adolescents

International audienceLosing contact with adult suicide attempters in the year after the suicide attempt (SA) increases the risk of recurrence. The situation with adolescents is unknown. We aimed to determine whether being lost to contact early (LCE) by clinicians is a risk factor of long-term SA recurrence among adolescents and the associated factors. Data were collected 10 years after an index SA and a Cox model was used for analysis. Among the 249 SA patients included, 59 (24%) were LCE, the most important risk factor of SA recurrence up to 10 years (hazard ratio [HR] = 2.8 [95% confidence interval (95% CI) 1.4-5.5]; p = .016). Risk factors of being LCE were female sex (odds ratio [OR] = 2.9 [95% CI 1.1-8.2]; p = .009), a psychiatric comorbidity (OR = 2.2 [1.1-4.3]; p = .023) and no family history of suicide (OR = 2.1 [1.1-4.3]; p = .047). These results support the development of preventive actions early after an SA in an adolescent to maintain contact and care

Corrigendum to “Recurrence of suicide attempt in adolescents lost to contact early by clinicians: The 10-year REPEATERS cohort of French adolescents” [Journal of Adolescence 43 (2015) 111–118]

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Synthesis and characterization of C\u3csub\u3e60\u3c/sub\u3e end-capped poly(ethylene oxide) stars

A C60 derivatized triarm poly(ethylene oxide) copolymer was synthesized and characterized. The soluble polymer produced spread at aqueous interfaces to form highly expanded fluid Langmuir monolayers. The onset area of 1300 Å2/arm is likely due to the polymer disrupting cohesion between C60 units. Compression/expansion studies revealed a significant elastic region, beyond which the C60 units condensed, and a compact rigid and irreversible monolayer formed

Impact of dam flushing operations on sediment dynamics and quality in the upper Rhône River, France

International audienceThe Rhône River (France) has been developed for energy production and 21 dams have been built. To avoid problems due to sediment storage, dam flushing operations are periodically organized. In order to investigate the impact of such operations on suspended particulate matter (SPM) dynamics (resuspension and fluxes) and quality (physico-chemical characteristics and contamination), we monitored flushing operations performed in June 2012 on 3 major dams on the Upper Rhône River. Samples were collected from 2011 to 2016 at a permanent monitoring station, located 150 km downstream. At equal water discharge, mean SPM concentrations during flushing operations were on average 6-8 times higher than during flood events routinely recorded at the permanent station from 2011 to 2016. While of short duration (19 days), the flushing operations led to the resuspension of SPM and contributed to a third of the mean annual SPM flux. Moreover, physico-chemical characteristics of transported SPM differed from those measured during usual baseflow and flood regimes. Variation of particulate organic carbon and contaminant concentrations (trace metals elements (TME) and organic compounds) were mostly driven by particle size and origin. SPM contamination was generally lower than during baseflow and flood regimes. However, flushing operations led to the resuspension of contaminated sediment trapped behind dams and to an increase of polycyclic aromatic hydrocarbons (PAHs) and Bis(2-ethylhexyl) phthalate (DEHP) concentrations. Finally, we propose a list of recommendations for the design of an adequate monitoring network to evaluate the impact of dam flushing operations on large river systems

Aggregation and surface morphology of a poly(ethylene oxide)-block-polystyrene three-arm star polymer at the air/water interface studied by AFM

The behavior of a three-arm star amphiphilic copolymer, PEO3-b-PSD3 were investigated at the air/water interface through atomic force microscopy (AFM) images of the monolayer on mica. The Langmuir-Blodgett (LB) films were prepared on the KSV 5000 system with a platinum Wilhelmy plate. The PEO3-b-PS3 three arm star used were prepared by the anionic polymerization of ethylene oxide followed by the ATRP synthesis of styrene. It was assumed that the characteristics of the monolayer at the air/water interface remained unchanged upon transfer to the mica surface