Ultrafine conducting fibers: metallization of poly(acrylonitrile-co-glycidyl methacrylate) nanofibers

Electrospun poly(glycidylmethacrylate) (PGMA) and poly(acrylonitrile-co-glycidyl methacrylate) (P(AN-GMA)) nanofibers were coated with monodisperse silver nanoparticles by using an electroless plating technique at ambient conditions. Oxirane groups on the surface of nanofibers were replaced with reducing agent, hydrazine. Surface modified nanofibers were allowed to react with ammonia solution of AgNO3. A redox reaction takes place and metallic silver nucleate on fibers surface. Parameters affecting the particle size were determined

COVID-19 Pozitif Tanısıyla Yatan Hastaların Uyku Kalitesinin İncelenmesi

Amaç: COVID-19 pozitif (+) tanılı hastaların fiziksel sağlıkları yanında ruhsal iyilik hallerinin korunması ve geliştirilmesinde önemi olan uyku sorunlarını tanımlamak; etkin hemşirelik bakımının planlanmasında yol gösterici olacaktır. Bu doğrultuda, bu araştırmada COVID-19 pozitif (+) tanısı konulan ve hastanede yatarak tedavi gören hastaların uyku kalitesinin değerlendirilmesi amaçlanmıştır.Yöntem: Araştırma, 18 Mayıs - 12 Haziran 2021 tarihleri arasında bir Eğitim ve Araştırma Hastanesi COVID-19 kliniklerinde yatan hastalardan, katılmayı kabul eden, 112 hasta araştırmaya dâhil edilmiştir. Veriler, Kişisel Bilgi Formu, Pittsburgh Uyku Kalitesi İndeksi (PUKİ) kullanılarak toplanmıştır.Bulgular: Araştırmaya katılanların çoğunluğunu erkekler (%63,4) oluşturmuştur. COVID-19 pozitif (+) tanısı konduktan sonra hastaneye yatışların çoğu 1-3. günde gerçekleşmiş, uyku bozuklukları da yine hastaneye yatışın 1-3. gününde meydana gelmiştir. Uyku bozukluğuna neden olan durumlar sırasıyla stres, ölüm korkusu, oksijen maskesi kullanımı, solunum güçlüğü, hastalık sürecinin belirsiz olması, öksürük, sosyal izolasyon, vb. olduğu ve %21,4’ünün uyku kalitesinin kötü ( gt;5) olduğu saptanmıştır.Sonuç: COVID-19 pozitif (+) tanısıyla yatan hastalarda stres, kaygı, ölüm korkusu bilgi eksikliği gibi durumların uyku bozukluğuna neden olduğu göze çarpmaktadır. Katılımcıların yaklaşık dörtte birinin uyku kalitesinin kötü olduğu söylenebilir

Metal kaplı nano fiberler

Mevcut buluş, nano-­fiberlerin metal kaplanması için bir yönteme, bu yöntemle elde edilen metal kaplı nano-­fiberlere ve bu metal kaplı nano-­fiberlerin kullanımına ilişkindir.Sabancı Üniversites

QT and JT dispersion in children with familial mediterranean fever

Objectives: This study aims to determine QT dispersion and JT dispersion, and their relationship with conventional echocardiography values in a group of children with familial Mediterranean fever (FMF). Patients and methods: The study included 48 FMF patients (26 males, 22 females, mean age 11.10±3.42 years; range 5 to 18 years) as the FMF patients and 31 healthy children (17 males, 14 females, mean age 9.61±2.83 years; range 5 to 17 years) as the healthy controls. Electrocardiography and conventional echocardiography were performed on the FMF patients and healthy controls. Both groups were evaluated with a standard 12-lead electrocardiography. QT, JT and RR distances were measured in both groups. The corrected QT (QTc) and corrected JT (JTc) were calculated. QTcd and corrected JT dispersion (JTcd) were detected. Results: There was no statistically significant difference between the FMF patients and healthy controls in terms of RR, QT, QTd, QTcd, JT, JTc, JTd, and JTcd measurements and echocardiography parameters. QTc value was higher in the FMF patients than the healthy controls. Conclusion: QTc value indicates increased ventricular sensitivity and is an important marker of cardiovascular mortality. It has an important effect on sudden cardiac death and arrhythmia. Our study results suggest that electrocardiographic monitoring may be useful in patients with FMF

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A Novel Approach to Limit Chemical Deterioration of Gilthead Sea Bream(Sparus aurata)Fillets: Coating with Electrospun Nanofibers as Characterized by Molecular, Thermal, and Microstructural Properties

Coating of sea bream fillets with thymol loaded chitosan based electrospun nanofibers (TLCN) and chitosan based nanafibers (CN) has been presented a novel approach to delay chemical deterioration. We assessed CN and TLCN with respect of scanting of total volatile basic nitrogen (TVBN), trimethylamine (TMA), thiobarbituric acid (TBA) deterioration during cold storage condition. Electrospinning process was applied to obtain TLCN and CN. Both of nanofibers obtained from biopolymer and bioactive material were cylindrical, smooth, beadless. Thermal, molecular, zeta potential (ZP), and surface properties of the groups were investigated, revealing that CN indicated molecular interactions with thymol in nanofibers, reduce in physical properties of these structures, thermal decomposition (an alteration in mass of CN and TLCN at temperatures below 190 degrees C, corresponding to 20.53% and 19.97%, respectively) and also dispersion stabilities ( potential) of CN and TLCN were determined 33.68 +/- 3.35 and 21.85 +/- 1.96 mV, respectively. TVBN and TMA stability analyses demonstrated that CN and TLCN were both effective in delaying chemical deterioration of fish fillets, furthermore TLCN was more effective against chemical deterioration. TBA analyses results of fish fillets indicated that CN and TLCN delayed rancidity in fish meat as compared to control group samples. The presented study results suggested that coating of the sea bream fillets with CN and TLCN would be a promising approach to delay the chemical deterioration of fish fillets