Determination of the irradiation effects on senna (Casia acutifolia) leaves by ESR technique and microbiological analysis

Sezer, M. Özgür; Ece, Emel; Uslu, Ali Uğur; Özmen, Ayhan; Sayin, Ulku

doi:10.1016/j.radphyschem.2019.108434

Cited by 3 publications

(2 citation statements)

References 32 publications

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“…Saat atom ataupun molekul dengan elektron tidak berpasangan diberi medan magnet yang homogen hingga momentum magnetik elektron bebas hendak berhubungan dengan medan magnet sehingga tercipta tingkat-tingkat energi spin. Elektron hendak bertransisi dari sesuatu tingkatan energi spin ke tingkatan energi spin yang lebih besar saat ada energi yang cocok buat transisi (Sezer et al, 2019). Pada ESR, energi buat transisi elektron disediakan oleh osilator yang sediakan gelombang radio.…”

Section: Proses Kerja Esrunclassified

Evaluasi Radikal Bebas dalam Kopi Robusta dan Arabika Toraja dengan metoda Electron Spin Resonance

Jamaludin

Muriati²

2022

Pencerah

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Penentuan mutu kopi didasarkan pada rasa, aroma dan fisik biji kopi, Perkebangan baru penentuan mutu kopi didasarkan pada kadar antioksidan, Penelitian ini bertujuan untuk mengevaluasi jumlah radikal bebas dalam kopi bubuk jenis Robusta dan Arabica asal daerah Toraja. Jumlah Radikal Bebas dalam kopi dapat menjadi dasar penentuan mutu kopi. Untuk mengevaluasi jumlah radikal bebas pada kopi, metoda penelitian ini menggunakan spectroskopi Electron Spin Resonance. Metoda ini, menunjukkan intensitas sinyal menjadi dasar untuk menentukan jumlah radikal bebas dari kedua jenis kopi asal Toraja tersebut. Mengetahui jumlah Radikal Bebas penting untuk kemudian dianalisa kaitannya dengan kadar antioksidan dalam kopi akan menjadi langkah untuk melakukan Evaluasi lanjut kualitas kopi berdasarkan kadar radikal bebas yang dikandungnya. Hasil penelitian menunjukkan terdapat perbedaan jumlah radikal bebas dalam setiap sample kopi tersebut. Jumlah radikal bebas dapat menjadi paramater alternatif dalam penentuan kualitas kopi dan dapat dikembangkan secara berkelanjutan, konsentrasi radikal bebas dinyatakan oleh intensitas sinyal ESR. Berturut-turut intensitas tinggi ke rendah dimiiiki sample Robusta 1 (444,54), Pearbury (2040,02), Pango-pango (2600,00), Sapan Vilage (2239,39), Padamaran (2028,00), green bean (750,00) dan Robusta 2 (657,57). Ini artinya, antioksidan tinggi dimiliki oleh sample dengan intentsitas atau konsentrasi radikal bebas yang rendah. Data ini menunjukkan bahwa efek suhu pemanggangan berpengaruh terhadap kadar antioksidan sample kopi.

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Section: Proses Kerja Esrunclassified

Evaluasi Radikal Bebas dalam Kopi Robusta dan Arabika Toraja dengan metoda Electron Spin Resonance

Jamaludin

Muriati²

2022

Pencerah

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“…In addition, once validated the method does not require confirmation of the nonnegative results. The method has been internationally validated through trials for pistachio nut shells, strawberries and paprika (Linke et al, 1995;Linke et al, 1996;Raffi, 1992;Raffi, Stevenson, Kent, Thiery, & Belliardo, 1992;Schreiber et al, 1993;Schreiber et al, 1996) but, in principle, it could be applicable to all vegetables containing cellulose (Chiappinelli et al, 2019;Jeong, Akram, Ahn, & Kwon, 2014;Jo, Kyung, Park, & Kwon, 2016;Maghraby, Salama, Sami, Mansour, & El Sayed, 2014;Raffi et al, 1989;Sezer, Ece, Uslu, Osmen, & Savin, 2019;Shahbaz, Akram, Ahn, & Kwon, 2013;Tomaiuolo et al, 2018). In practice, however, its reliability in detecting irradiation is limited when the sample has a low content of crystalline cellulose and/or a high moisture content, which favours radical recombination leading to false negative results (Bortolin, Bustos Griffin, Cruz-Zaragoza, De Coste, & Onori, 2006;Kwon, Ahn, Akram, Son, & Lee, 2013;Yordanov, Lagunov, & Dimov, 2009).…”

Section: Introductionmentioning

confidence: 99%

An inter-laboratory comparison to evaluate the suitability of EN 1787 standard to detect irradiation in plant-origin foods with health benefits

et al. 2020

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This paper reports the results of a study carried out to verify the applicability of the EN 1787 method, which uses the Electron Spin Resonance (ESR) technique for the identification of irradiated plant-origin foods with health benefits. The method was tested on samples of herbal ingredients of Plant Food Supplements (PFSs), nuts and fresh blueberries. Untreated and irradiated samples of Camellia sinensis (leaves) Ginkgo biloba (leaves), Glycine max (seeds), Silybum marianum (fruits), Vaccinium myrtillus (fruits), almonds, hazelnuts, peanuts, pistachios, walnuts and fresh blueberries were analysed. The work includes an inter-laboratory blind test involving five Italian laboratories that perform routine analyses for the official control of irradiated food. A total of 180 untreated and irradiated samples of PFS ingredients, nuts and fresh blueberries were analysed. The analyses on the irradiated samples were replicated even a long time after irradiation (up to two years depending on the matrix) to test the reliability of the method throughout the shelf life of the products. The results were matrix-dependent: all the 5 kGy irradiated nuts and the 1 kGy-irradiated blueberries were correctly classified, whereas herbal ingredients showed complex ESR spectra with spurious signals which often prevented the correct classification of the sample.

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EPR investigation of gamma-irradiated FAMOSER drug for DOSIMETRIC purposes

Babayeva,

Ece,

Biyik

et al. 2023

Radiation Protection Dosimetry

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Exposure to ionizing radiation can also lead to the formation of stable or unstable radicals in the structures of drugs, as in many materials. The concentrations of these radicals may show a linear dependence on the radiation dose exposed. Since drugs are materials that can be found next to or on radiation victims during a possible nuclear or radiological accident, it is very meaningful to determine the Electron Paramagnetic Resonance (EPR) dosimetric properties of stable radicals in their structures. In this study, the dosimetric properties of Famoser, which is one of the stomach-relieving drugs that people often have with them in their daily life, in the dose range of 10–800 Gy were investigated by EPR technique.

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Determination of the irradiation effects on senna (Casia acutifolia) leaves by ESR technique and microbiological analysis

Cited by 3 publications

References 32 publications

Evaluasi Radikal Bebas dalam Kopi Robusta dan Arabika Toraja dengan metoda Electron Spin Resonance

Evaluasi Radikal Bebas dalam Kopi Robusta dan Arabika Toraja dengan metoda Electron Spin Resonance

An inter-laboratory comparison to evaluate the suitability of EN 1787 standard to detect irradiation in plant-origin foods with health benefits

EPR investigation of gamma-irradiated FAMOSER drug for DOSIMETRIC purposes

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