Aerogels fabricated with origami graphene part I: Preparation and mechanical behavior
JOURNAL OF ALLOYS AND COMPOUNDS
Authors: Li, Hongyan; Sun, Cong; Liu, Hongli; Li, Jiyuan; Wang, Dongmei; Zhang, Pengyu; Liu, Tong; Yang, Aiwu
Abstract
In this work, enlightened by origami theory, the folding of graphene on the mechanical properties of graphene aerogels (GA) was investigated. Graphene oxide (GO) sheets were folded by the coordination interaction and electrostatic interaction. Highly porous and continuous three-dimensional (3D) architectures of folded graphene aerogels (fGA) were fabricated with folded graphene sheets. Characterizations of the GO, GA, folded GO (fGO), and fGA were performed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), mechanical properties testing, Raman and so on. The results indicated that the fGA got circular pores, the diameter of which was smaller than that of GA. fGA had good mechanical properties. Even the cycle times were up to 50, the mechanical strength still reserved well. Raman mapping was carried to probe the load transfer of aerogels. The results suggested fGA could transfer load more effectively than that of GA. Finite element model suggested that the structure of folded graphene is more stable than that of the graphene. (C) 2018 Published by Elsevier B.V.
Tobacco smoking is associated with antipsychotic medication, physical aggressiveness, and alcohol use disorder in schizophrenia: results from the FACE-SZ national cohort
EUROPEAN ARCHIVES OF PSYCHIATRY AND CLINICAL NEUROSCIENCE
Authors: Mallet, J.; Le Strat, Y.; Schurhoff, F.; Mazer, N.; Portalier, C.; Andrianarisoa, M.; Aouizerate, B.; Berna, F.; Brunel, L.; Capdevielle, D.; Chereau, I; D'Amato, T.; Dubreucq, J.; Faget, C.; Gabayet, F.; Honciuc, R. M.; Lancon, C.; Llorca, P. M.; Misdrahi, D.; Rey, R.; Roux, P.; Schandrin, A.; Urbach, M.; Vidailhet, P.; Fond, G.; Dubertret, C.; Andrianarisoa, M.; Aouizerate, B.; Bazin, N.; Berna, F.; Blanc, O.; Bulzacka, E.; Capdevielle, D.; Chereau-Boudet, I; Chesnoy-Servanin, G.; Nathalie, Coulon; Danion, J. M.; Damato, T.; Deloge, A.; Delorme, C.; Denizot, H.; Dorey, J. M.; Dubertret, C.; Dubreucq, J.; Fluttaz, C.; Fond, G.; Fonteneau, S.; Gabayet, F.; Giraud-Baro, E.; Lacelle, D.; Lan-Con; Laouamri, H.; Leboyer, M.; Le Gloahec, T.; Llorca, L. P.; Metairie, E.; Misdrahi, D.; Offerlin-Meyer, I; Passerieux, C.; Peri, P.; Pires, S.; Portalier, C.; Ramet, L.; Rey R; Roman, C.; Schandrin, A.; Schfirhoff, F.; Tessier, A.; Tronche, A. M.; Urbach, M.; Vaillant, F.; Vehier, A.; Vidailhet, P.; Vila, E.; Yazbek, H.; Zinetti-Bertschy, A.; Brunel, L.; Faget; Strat, Le Y.
Abstract
Tobacco smoking is common in schizophrenia and is one of the main causes of premature mortality in this disorder. Little is known about clinical correlates and treatments associated with tobacco smoking in patients with schizophrenia. Still, a better characterization of these patients is necessary, in a personalized care approach. Aggressiveness and childhood trauma have been associated with tobacco smoking in general population, but this association has never been explored in schizophrenia. Our study examines the clinical and therapeutic characteristics of tobacco smoking in schizophrenia. 474 stabilized patients (mean age=32.2; 75.7% male gender; smokers n=207, 54.6%) were consecutively included in the network of the FondaMental Expert centers for Schizophrenia and assessed with valid scales. Current tobacco status was self-declared. Aggressiveness was self-reported with Buss-Perry Aggressiveness Questionnaire and Childhood Trauma with Childhood Trauma Questionnaire. Ongoing treatment was reported. In univariate analysis, tobacco smoking was associated with lower education level (p<0.01), positive syndrome (p<0.01), higher physical aggressiveness (p<0.001), alcohol dependence (p<0.001), and First Generation Antipsychotics (FGAs) use (p=0.018). In a multivariate model, tobacco smoking remained associated with physical aggressiveness (p<0.05), current alcohol dependence (p<0.01) and FGA use (p<0.05). No association was observed with childhood trauma history, mood disorder, suicidal behavior, psychotic symptom, global functioning or medication adherence. Patients with tobacco use present clinical and therapeutic specificities, questioning the neurobiological links between tobacco and schizophrenia. They could represent a specific phenotype, with specific clinical and therapeutic specificities that may involve interactions between cholinergic-nicotinic system and dopaminergic system. Further longitudinal studies are needed to confirm the potential efficacy of second generation antipsychotics (SGAs) on tobacco use in schizophrenia and to develop effective strategies for tobacco cessation in this population.