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Vegetable oil-based epoxy coating materials for self-healing and anticorrosive applications
Burcu Oktay,Jülide Hazal Türkcan,Oğuz Kaan Özdemir,Nilhan Kayaman‑Apohan 한국고분자학회 2023 Macromolecular Research Vol.31 No.11
A new bio-based epoxy curing agent from hempseed oil was prepared in this study. The chemical structure of the curing agent was confirmed by infrared spectrometry and nuclear magnetic resonance. Soybean oil-based epoxy resin was cured with a hempseed oil-based green curing agent to prepare a series of sustainable coatings under eco-friendly conditions. The reaction of epoxy resin with anhydride groups reacted without a catalyst. The prepared sustainable coatings showed excellent scratching and adhesion resistance. In addition, the coating showed self-healing properties via dynamic transesterification bonds between the epoxy and anhydride groups. The corrosion resistance of the sustainable coatings is investigated using electrochemical measurements. It revealed that the materials have strong anti-corrosion performance. Hence, these coatings can be used as a green alternative for encapsulation-based corrosion protection systems. Furthermore, the produced materials could be used as a VOC-free coating system.
Repetitive Transcranial Magnetic Stimulation for Treatment of Trichotillomania: Case Series
Efruz Pirdoğan Aydın,Jülide Güler Kenar,Aslı Tutan,Ömer Akil Özer,Kayıhan Oğuz Karamustafalıoğlu 대한정신약물학회 2020 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.18 No.4
Trichotillomania is a psychiatric disorder characterised by compulsive pulling out of one’s hair resulting in hair loss, which is included in the Diagnostic and Statistical Manual of Mental Disorders 5th edition category ‘obsessive-compulsive disorder and related disorders’. Behavioural therapy and some medications are suggested for the treatment of trichotillomania, though these are not effective for all patients. Therefore, new treatment options are needed. Five female patients diagnosed with trichotillomania applied low-frequency repetitive transcranial magnetic stimulation (rTMS) over bilateral supplementary motor area for 3 weeks. Baseline and after rTMS, patients were given Beck Depression Inventory, Beck Anxiety Inventory and Massachusetts General Hospital Hair Pulling Scale to evaluate the severity of disorder at baseline and post-rTMS. In this case series, three of five patients with trichotillomania obtained a substantial benefit from treatment, while one patient obtained a partial symptom reduction. The last patient experienced a mild increase in severity of disease after rTMS treatment. rTMS treatment can be effective in some patients with trichotillomania and can be a promising option in treatment of trichotillomania.
Didem Didar Balcı,Ebru Çelik,Gökhan Sarıkaya,Jülide Zehra Yenin,Esin Atik 대한피부과학회 2011 Annals of Dermatology Vol.23 No.-
Calcinosis cutis is a condition characterized by the deposition of calcium salts in the skin and subcutaneous tissues, and patients suffering from it encounter various connective tissue disorders, such as dermatomyositis (DM),scleroderma, and systemic lupus erythematosus. Although calcinosis cutis is frequently accompanied by juvenile dermatomyositis, rare cases have been reported in adult patients with DM. On the other hand, lichen sclerosus (LS) is a chronic inflammatory disease of the skin and mucosal surfaces. In the present report, we present a rare case of a 71-year-old patient with DM accompanied by ulcerated calcinosis cutis and vulvar LS. (Ann Dermatol 23(S3) S375∼S379, 2011)