The mental health of young workers: A pilot study

The aim of the study was to evaluate the distribution of psychological symptoms in young workers, and the relationship with regard to sociodemographic characteristics using the Brief Symptom Inventory (BSI; Derogatis, 1992), in İzmir Apprenticeship Training Center, Turkey, with 203 randomly selected apprentices aged 15-21, 31 (15.3%) females and 172 (84.7%) males. The mean age was 17.48± 1.24 years. The apprentices were from four different occupational groups: Metalwork (21.7%), Auto repair (29.6%), Electric repair (20.7%) and Hairdressing (28.1%). Results showed that apprentices who are female, who come from single-parent families, who reported low socioeconomic status, who had lost one of their parents or siblings, whose fathers had no stable job, and who work in hairdressing are at risk for psychological problems. In conclusion, those "at risk" apprentices should receive psychosocial support and counseling for coping with problems. © Society for Personality Research (Inc.)

Social and emotional outcomes of child sexual abuse: A clinical sample in Turkey

PubMed ID: 18794375Childhood sexual abuse is a traumatic life event that may cause psychiatric disorders such as posttraumatic stress disorder and depression. During 2003-2004, 20 sexually abused children were referred to the Child and Adolescent Psychiatry Clinic of Ege University in Izmir, Turkey. Two years later, the psychological adjustment of these children (M age = 9.4 years, SD = 3.63 years, range = 5 to 16 years) is evaluated. Semistructured interviews, a form for the sociodemographic characteristics, are used for evaluations by a child psychiatrist who is blind to the first evaluation. It is determined that sexually abused children have more psychiatric disorders within the first year than 2 years later. However, some behavior problems occur at both short-term and long-term follow-ups. © 2009 SAGE Publications

Contactless pulsed and continuous microdroplet release using photothermal liquid crystals

Abstract Targeted, on-demand delivery has been of interest using materials responsive to environmental stimuli. A delivery technique based on precise release of aqueous microdroplets from a liquid crystal (LC) medium with contactless stimulation is presented. A nematic LC is doped with a photothermal dye that produces heat under near IR light exposure. The heat is used to overcome the elastic strains in the LC phase, promoting the release of initially entrapped water droplets to the neighboring aqueous solution. Designing the geometry of LC-based emulsions and tuning the light intensity and position allows for manipulation of the release in two distinct modes defined as pulsated and continuous. In the pulsated mode, water droplets are released transiently from the casted water-in-LC emulsion layer based on sweeping by the moving isotropic-nematic phase boundary controlled by light. In the continuous mode, water droplets are ejected continuously from a droplet-shaped water-in-LC emulsion, due to a heating-induced internal flow controlled by light. The droplet release by contactless stimulation is used for the on-demand dosing of dopamine and its oxidizing reagent from isolated reservoirs to obtain an in situ reaction signal for a hydrogen peroxide assay. A new dual-mode release system developed with photothermal LCs holds potential in drug release, controlled mixing, and photothermal therapy

Nanoparticle self-assembly at the interface of liquid crystal droplets

Nanoparticles adsorbed at the interface of nematic liquid crystals are known to form ordered structures whose morphology depends on the orientation of the underlying nematic field. The origin of such structures is believed to result from an interplay between the liquid crystal orientation at the particles’ surface, the orientation at the liquid crystal’s air interface, and the bulk elasticity of the underlying liquid crystal. In this work, we consider nanoparticle assembly at the interface of nematic droplets. We present a systematic study of the free energy of nanoparticle-laden droplets in terms of experiments and a Landau–de Gennes formalism. The results of that study indicate that, even for conditions under which particles interact only weakly at flat interfaces, particles aggregate at the poles of bipolar droplets and assemble into robust, quantized arrangements that can be mapped onto hexagonal lattices. The contributions of elasticity and interfacial energy corresponding to different arrangements are used to explain the resulting morphologies, and the predictions of the model are shown to be consistent with experimental observations. The findings presented here suggest that particle-laden liquid crystal droplets could provide a unique and versatile route toward building blocks for hierarchical materials assembly