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The Barium (BSCF) and Lanthanum (LSCF) strontium cobalt–ferrite, are among the most studied mixed ionic electronic conducting materials having interesting properties as Oxygen Transport Membranes. In this paper the two materials are analysed after long term aging at high temperatures and permeation tests. Several characterisation techniques are used to understand degradation mechanisms. Surface layers were analysed by X-ray photoelectron spectroscopy: LSCF is stable, while on BSCF a thin layer of carbonates forms. Quantitative synchrotron radiation diffraction measurements of hexagonal phase content in aged BSCF allows determining Avrami coefficients at 780, 800 and 820 °C. This process is associated to the enrichment of Fe in the regions of grains near the lamellar hexagonal phase, as WDS maps show. Bulk measurements of X-ray Absorption Near Edge Structure (XANES) and the analysis of the Co2p doublet in XPS spectra confirm a reduction of Co ions oxidation number after long time at intermediate temperatures.

IntroductionRecent findings demonstrated significant overlaps among major psychiatric disorders on multiple neurocognitive domains. However, it is not clear which are the cognitive functions that contribute to this phenomenon.ObjectivesTo find the optimal clustering solution using the two-step cluster analysis on a sample of psychiatric patients.AimsTo classify into subgroups a cross-diagnostic sample of psychiatric inpatients on the basis of their neurocognitive profiles.MethodsSeventy-one patients with psychotic, bipolar, depressive and personality disorders hospitalised at Psychiatric Diagnosis and Care Service of Bufalini Hospital of Cesena participated in the study. The symptomatology was assessed using Health of the Nation Outcome Scales-Roma and Brief Psychiatric Rating Scale. Cognitive functions were evaluated using Tower of London, Modified Wisconsin Card Sorting Test, Judgment and Verbal Abstract Tasks test, Raven matrices, Attentional Matrices, Stroop Test and Mini Mental State Examination. Two-step cluster analysis was conducted using the standardized scores of each neurocognitive test.ResultsTwo groups were obtained:– group 1, with good cognitive performances;– group 2, with almost all subjects having impaired cognitive performances.Executive functions and attention are the major determinants of the cluster solution. The clusters did not differ on socio-demographic correlates. Different diagnoses were equally distributed amongst the clusters.ConclusionsTwo-step cluster analysis was useful in identifying subgroups of psychiatric inpatients with different cognitive functioning, overcoming other cluster techniques limitations. According to former literature, these results confirm a continuum of severity in cognitive impairment across different psychiatric disorders.Disclosure of interestThe authors have not supplied their declaration of competing interest.

IntroductionAccording to many studies, suicide attempters, compared to healthy general population, exhibit some neurocognitive deficits, which are considered promising endophenotype of suicidal behavior disorder. A similar pattern of impairment is widespread in individuals affected by psychiatric disorders.ObjectivesTo compare neurocognitive functions of hospitalized suicide attempters (A) with those of an inpatient group without history of suicidal behavior (NA), likewise affected by psychiatric disorders.AimsThe purpose of the study is to evaluate if neurocognitive impairment is associated to suicidal behaviors, regardless of underlying psychiatric diagnosis.MethodsThe whole sample is composed of 70 adult psychiatric inpatients (34 males, 36 females), divided into two groups (A and NA) of 35 patients with diagnosis of Psychotic, affective and personality disorders. Neurocognitive functions were assessed using Tower of London Test (TOL), Modified Wisconsin Card Sorting Test (MCST), Stroop Test (ST) and Attentional Matrices (AM). Differences between A and NA groups were analyzed using U-test of Mann–Whitney and cross tabulations, taking into account the three diagnostic areas.ResultsStatistically significant differences were found between A and NA with regard to the ability of categorization (MCST), planning, problem solving and inhibition of automatic response (TOL), which proved to be more preserved in A individuals. No significant differences were found on selective attention tasks (ST and AM).ConclusionsThese preliminary findings show statistically significant differences on executive functions between suicide attempters and psychiatric non-attempter individuals. Further research on larger samples is needed to investigate these associations.Disclosure of interestThe authors have not supplied their declaration of competing interest.