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    Microstructural and dielectric properties of naphthalene based polyamide/?-Ni(OH)2 nanocomposites
    (Bentham Science Publishers B.V., 2018) Sezer S.; Öz E.; Altin S.; Vural S.; Gültek A.; Köytepe S.; Nilüfer Kıvılcım F.
    Background: Aromatic polyamides are important materials having outstanding thermal, electronic and mechanical properties among high performance polymers and industrial plastics. In addition, aromatic polyamides can be utilized in electronic devices with their low dielectric constant which indicates the storage capacity of these devices. Objective: Free volume is very important for dielectric materials and increase in free volume of a polymer reduces its dielectric constant. The aims of the current study are to create free volume in the bulk polyamide structure and to reduce the dielectric constant by using ?-Ni(OH)2 particles. Method: The composites obtained from ?-Ni(OH)2 (flower-like nanoparticles) in a naphthalene-based polyamide matrix were prepared. Firstly, ?-Ni(OH)2 nanoparticles were synthesized by microwave-assisted solvothermal technique under various reaction conditions. Then, polyamide/?-Ni(OH)2 composites were prepared via direct dispersion methods at different reinforcement ratios. Results: ?-Ni(OH)2 (flower-like nanoparticles) and polyamide/?-Ni(OH)2 composites were prepared successfully. Our studies showed that the dispersion of ?-Ni(OH)2 nanoparticles in polyamide matrix is homogenous and prepared composites have good thermal and dielectric properties with promising results for electronic industry. Conclusion: Dielectric properties of the prepared composites decrease with increasing ?-Ni(OH)2 nanoparticle content and all composites show low dielectric constant when ?-Ni(OH)2 nanoparticle content is over 1 wt.% compared to the pure polyamide. © 2018 Bentham Science Publishers.
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    Orf Infection with Multiple Lesions in the Burn Area
    (OrtadogŸu Reklam Tanitim Yayincilik Turizm Egitim Insaat Sanayi ve Ticaret A.S., 2022) Arslan S.; Altunişik N.; Türkmen D.; Şener S.; Marsak M.; Sezer S.; Toprak S.
    Orf, a viral zoonotic disease, is transmitted to humans from small ruminants such as sheep or goats. It usually progresses with one or more nodular lesions appearing on the dorsal surface of the fingers. Orf disease may sometimes present differently from its typical location and clinical presentation. Here, we present 2 orf cases that occurred after burns. Both patients' family members had a history of contact with sheep and goats. The diagnosis of orf was based on clinical findings, a history of animal contact, and exclusion of differential diagnoses. In both cases, the lesions healed with mild hyperpigmentation. © 2022 OrtadogŸu Reklam Tanitim Yayincilik Turizm Egitim Insaat Sanayi ve Ticaret A.S.. All rights reserved.