Journals / Politeknik Dergisi / 2016 / Cilt: 19 - Sayı: 3

Determination of Radicals Produced by Irradiation in Cholesteryl Octanoate Single Crystals Using Esr Technique

Cholesteryl Octanoate Tek Kristalinde Işınlama ile Oluşan Radikalin ESR Tekniği Kullanılarak Belirlenmesi

Pages
343–348
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In addition, simulations were made for identified radical and a good agreement was found with the experimental spectra.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, the radicals produced by gamma irradiation was determined using ESR technique in cholesteryl octanoate (C35H60O2 ), a cholesterol ester, which has medical importance.
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Key Findings & Data:The samples that crystallized in ethanol solution were irradiated with 60Co-γ source.
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Conclusion & Impact:In addition, simulations were made for identified radical and a good agreement was found with the experimental spectra.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study, the radicals produced by gamma irradiation was determined using ESR technique in cholesteryl octanoate (C35H60O2 ), a cholesterol ester, which has medical importance. The samples that crystallized in ethanol solution were irradiated with 60Co-γ source. The molecules that have diamagnetic property become paramagnetic after irradiation. ESR spectra were recorded in different microwave powers and different temperatures at 10o intervals in the magnetic field applied along each of the perpendicular axes using JEOL JESFA-300 X-band ESR spectrometer located in Selcuk University Advanced Technology Research and Application Center. By considering the chemical structure and ESR spectra of Cholesteryl octanoate molecule, it was identified that radiation produced stable and long lived radical, R-ĊH3αCHβCH2γ , in the sample. The hyperfine splitting and spectroscopic splitting values which have anisotropic property due the location of crystal in the magnetic field were obtained. In addition, simulations were made for identified radical and a good agreement was found with the experimental spectra.

Özet

Bu çalışmada tıbbi öneme sahip Cholesteryl octanoate (C35H60O2 ) kolesterol esterinde gama ışınlamasının oluşturduğu radikaller ESR tekniği ile tespit edildi. Etanol çözeltisinde kristallendirilen örnekler 60Co-γ kaynağı ile ışınlandı ve ışınlama öncesi diyamanyetik özellik taşıyan moleküllerin ışınlama sonrası paramanyetik hale geldiği belirlendi. ESR spektrumları Selçuk Üniversitesi İleri Teknoloji Araştırma ve Uygulama Merkezi’ nde bulunan JEOL JESFA-300 X-band ESR spektrometresi ile tek kristalin birbirine dik üç ekseninde 10o aralıklarla, farklı mikrodalga güçlerinde ve farklı sıcaklıklarda kaydedildi. Cholesteryl octanoate molekülünün kimyasal yapısı ve ESR spektrumları göz önüne alınarak radyasyonun örneklerin yapısında kararlı ve uzun ömürlü R-ĊH3αCHβCH2γ radikali oluşturduğu tespit edildi. Manyetik alan içinde yönelime bağlı anizotropik özellik taşıyan radikalin spektroskopik yarılma çarpanı değerleri ve aşırı ince yapı sabitleri elde edildi. Ayrıca tespit edilen radikal için ESR simulasyonu yapıldı ve deneysel spektrumlarla uyum gözlendi.

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Cite This Article

SAYIN, Ü., BÜYÜKÇELEBİ, S., ÖZMEN, A. (2016). Determination of Radicals Produced by Irradiation in Cholesteryl Octanoate Single Crystals Using Esr Technique. Politeknik Dergisi, Cilt: 19 - Sayı: 3, 343–348. https://ajindex.com/articles/306575

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