Utjecaj ojačanja epoksidnom smolom na izvlačnu silu vijka u ploča vlaknatica i iverica koje se rabe u proizvodnji namještaja

The study aimed to increase the screw withdrawal strength of medium density fiberboard and particleboard used in furniture strength by using epoxy resin in the screw pilot hole. Therefore, the effects of pilot hole diameters, screw diameter, and amount of epoxy resin on screw withdrawal strength of medium density fiberboard and particleboard from face and edge were investigated. According to TS EN 13446, 50 mm × 50 mm specimens were cut from commercial medium density fiberboard and particleboard boards. A static load was applied parallel to the screw direction. The screw withdrawal strength of medium density fiberboard was higher than the screw withdrawal strength of particleboard because of its density. Besides, the screw withdrawal strength of medium density fiberboard and particleboard samples with a 3.5 mm screw diameter was higher compared to those with a 4.5 mm screw diameter. A decrease in pilot hole diameter and an increase in the amount of epoxy resin provided higher screw withdrawal strength of materials. Using 20 % epoxy resin of the volume of the pilot hole resulted in two times better screw withdrawal strength values. The study showed that a higher amount of epoxy resin, smaller pilot hole diameter, and smaller screw diameter contribute to better screw withdrawal strength of both medium density fiberboard and particleboard from the face and edge.Cilj ovog istraživanja bio je povećati izvlačnu silu vijka u ploča vlaknatica i iverica koje se rabe u proizvodnji namještaja, i to upotrebom epoksidne smole u pilot-rupama za vijke. Stoga je ispitan utjecaj promjera pilot-rupa, promjera vijka i količine epoksidne smole na izvlačnu silu vijka na plohi i rubu ploče vlaknatice i iverice. Uzorci dimenzija 50 mm × 50 mm prema TS EN 13446 izrađeni su od komercijalne srednje guste ploče vlaknatice i ploče iverice. Statičko opterećenje djelovalo je paralelno na smjer vijka. Zbog razlika u gustoći ploča izvlačna sila vijka bila je veća za srednje gustu ploču vlaknaticu nego za ploču ivericu. Osim toga, izvlačna sila vijka promjera 3,5 mm u srednje gustoj ploči vlaknatici i ploči iverici bila je veća od izvlačne sile vijka promjera 4,5 mm. Smanjenje promjera pilot-rupe i povećanje količine epoksidne smole omogućilo je veću otpornost materijala na izvlačenje vijaka. Upotrebom 20 % epoksidne smole u odnosu prema volumenu pilot-rupe rezultiralo je dvostruko boljim vrijednostima izvlačne sile vijka. Istraživanje je pokazalo da veća količina epoksidne smole, manji promjer pilot-rupe i manji promjer vijka pridonose boljoj izvlačnoj sili vijka na plohi i rubu srednje guste ploče vlaknatice i ploče iverice

Mediating role of childhood abuse for the relationship between schizotypal traits and obsessive-compulsive disorder

The mediating role of childhood trauma in the relationship between schizotypal symptoms and obsessive-compulsive disorder (OCD) was not sufficiently investigated to date. Objectives: In the present study, our major goal was to analyse the mediator role of childhood abuse (emotional, physical, and sexual), and neglect (emotional and physical) on the link between schizotypal symptoms and OCD, after controlling for duration of OCD, the mean number of comorbid Axis I disorders, and current anxiety. Methods: One hundred fifteen patients (aged 18-65 years) who had primary diagnosis of OCD and YaleBrown Obsessive-Compulsive Scale score ≥16 were assessed using the short form of Childhood Trauma Questionnaire questionnaire (CTQ-SF), Schizotypal Personality Questionnaire (SPQ), and Beck Anxiety Inventory (BAI). Results: The all types of schizotypal symptoms were significantly correlated with the scores of childhood abuse and neglect, and BAI. The childhood abuse as a mediator significantly predicted the total YBOCS scores (p = 0.02) after when BAI scores were controlled. However, childhood neglect was not multivariately related to current OCD severity, and did not mediate the relationship between schizotypal traits and total YBOCS scores. Discussion: We suggested that childhood trauma mediated the schizotypal traits in relationship with current OCD severity independent from anxiety severity

Erratum to: 36th International Symposium on Intensive Care and Emergency Medicine

[This corrects the article DOI: 10.1186/s13054-016-1208-6.]

A misidentification ritual in a patient with obsessive-compulsive disorder: clinical and pharmacotherapeutic implications

Misidentification of self, others, places, time, and objects occurs in a large number of medical or psychiatric conditions. Misidentification syndromes have been rarely reported in patients with primary non-psychotic conditions. The subjects with obsessive-compulsive disorder (OCD) may present unusual and rare symptoms. In this case report, we present an OCD patient who exhibited a misidentification ritual to decrease his anxiety arising from horrific images of someone assaulting his wife and children. He substituted the face of assailant with the faces of three different previously known individuals. For this case, we supposed that this ritual was related to an autogenous obsession and also was associated with schizotypal personality traits. To our knowledge, this is the first case exhibiting misidentification rituals related to non-delusional violent images in a patient with OCD

Postpartum-onset and childhood sexual trauma in a patient with skin picking disorder: a case report

Women are at risk for the development of psychiatric disorders, particularly depression and psychosis in the postpartum period. Few studies have examined anxiety disorders or obsessive-compulsive and related disorders during pregnancy and the postpartum period. The individuals with skin-picking disorder (SPD) frequently have childhood history of sexual abuse. To best of our knowledge, there is no report in literature on postpartum-onset SPD to date. We here report a case of SPD initially presented a postpartum onset and exacerbated following a sexual trauma long years after her delivery. She had no previous history of trauma or psychiatric diagnoses. Pregnancy and sexual trauma seem to be associated with occurrence and relapsing of SPD in this case

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Students and faculty diggind in front of new marquee. Undated Murray High Schoo

Cortico-thalamo-striatal circuit components’ volumes and their correlations differ significantly among patients with obsessive–compulsive disorder: a case–control MRI study

AIM: In the present study, we aimed to determine the volume differences in brain regions involved in cortical-striatal-thalamic-cortical circuit (CSTC) between healthy subjects and obsessive–compulsive disorder (OCD) patients. We also evaluated the potential relationship between volumes of region of interest and various illness parameters (duration and current severity OCD, and the influence of drug treatment). METHODS: We examined the volumetric differences in dorsolateral prefrontal cortex (DPFC), orbitofrontal cortex (OFC), anterior cingulate cortex (ACC), thalamus and striatum between OCD patients (n = 21) and healthy controls (HCs) (n = 25). RESULTS: Patients with OCD had significantly larger total, right, and left DLPFC, and OFC volumes compared to HCs. Total, and left ACC, total, and left striatum volumes were significantly smaller in OCD patients than in HC. The thalamus volumes were not different between two groups. The most of volumetric correlations in HCs disappeared among OCD patients. Only, the correlation between the volumes of left striaum and left ACC volume remained significant. Fisher's r-to-z transformation tests indicated that correlation coefficients of brain volumes significantly differed between both groups for right ACC and left (z = 2.17, p = .03) and right OFC (z = 2.00, p = .04); left ACC and right OFC (z = 2.41, p = .01); right ACC and left (z = 2.94, p = .003), and right striatum (z = 2.43, p = .01). CONCLUSIONS: Our findings indicate the impaired connectivity of ACC, OFC, and striatum in the pathophysiology of OCD. Further research is needed to explore precisely which brain regions nuclei are specifically involved in the occurence of OCD symptoms

The characteristics of the comorbidity between social anxiety and separation anxiety disorders in adult patients

WOS: 000477892100009PubMed ID: 31322453Objective: In the present study, we compared social anxiety disorder (SAD) patients with (n = 31) and without childhood and adulthood separation anxiety disorder (SeAD) (n = 50) with respect to suicidal behavior, avoidant personality disorder (AvPD), other anxiety disorders (ADs), and major depression as well as some sociodemographic variables. Methods: In assessment of patients, we used Structured Clinical Interview for Separation Anxiety Symptoms, childhood and adulthood Separation Anxiety Symptom Inventories, Liebowitz Social Anxiety Scale, The SCID-II Avoidant Personality Disorder Module, Beck Depression Inventory, and Beck Scale for Suicidal Ideation. Results: SAD patients with SeAD had higher comorbidity rates of AvPD, other lifetime ADs and panic disorder, and current major depression than those without SeAD. The current scores of SAD, depression, and suicide ideation and the mean number of AvPD symptoms were significantly higher in comorbid group compared to pure SAD subjects. The SAD and SeAD scores had significant associations with current depression, suicide ideations, and AvPD. The mean number of AvPD criteria and the current severity of depression were significantly associated with the comorbidity between SAD and SeAD. Conclusion: Our findings might indicate that the comorbidity of SeAD with SAD may increase the risk of the severity of AvPD and current depression