Quantification of overall migration levels from poly (vinyl chloride) films: Effects of gamma and electron beam radiation

In this study, the relationship between ionizing radiation treatment and thermal degradation kinetics of Poly (vinyl chloride) (PVC) polymer film was investigated. The unirradiated and 25 kGy irradiated samples treated with gamma rays or electron beam radiation were submitted to thermogravimetric analysis (TGA) at different heating rates (10 – 30 K.min-1). The TGA data was used to obtain the apparent activation energy values (Ea) according to Flynn-Wall-Ozawa method. TGA analysis suggested that electron beam radiation promotes a slight increase on maximum temperature for dehydrochlorination reaction on PVC. Gamma-rays irradiation caused a small reduction of maximum temperature of HCl evolution of PVC. Thermal degradation kinetics results showed that 25 kGy irradiated samples presents an apparent activation energy values from 104 - 109 KJ.mol-1. The apparent Ea values suggested that 25 kGy gamma radiation or 25 kGy electron beam radiation convert PVC polymer films more prone to HCl evolution due to radiolysis of polymer. Evaluation of the Ea values by Flynn-Wall-Ozawa method allows a good analytical instrument to comprehend dehydrochlorination reaction on irradiated PVC polymer films.

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Malignant melanoma and other second cutaneous malignancies in cutaneous T-cell lymphoma. The influence of additional therapy after total skin electron beam radiation

Archives of Dermatology ◽

10.1001/archderm.131.4.432 ◽

1995 ◽

Vol 131 (4) ◽

pp. 432-435 ◽

Cited By ~ 11

Author(s):

A. G. Licata

Keyword(s):

Electron Beam ◽

T Cell ◽

Malignant Melanoma ◽

Cell Lymphoma ◽

T Cell Lymphoma ◽

Cutaneous T Cell Lymphoma ◽

Beam Radiation ◽

Electron Beam Radiation ◽

Additional Therapy

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Application of Novel Non-Thermal Physical Technologies to Degrade Mycotoxins

Journal of Fungi ◽

10.3390/jof7050395 ◽

2021 ◽

Vol 7 (5) ◽

pp. 395

Author(s):

Mohammad Yousefi ◽

Masoud Aman Mohammadi ◽

Maryam Zabihzadeh Khajavi ◽

Ali Ehsani ◽

Vladimír Scholtz

Keyword(s):

Electron Beam ◽

Food Systems ◽

Large Scale ◽

Plasma Electron ◽

Pulsed Light ◽

Beam Radiation ◽

Practical Applications ◽

Electron Beam Radiation ◽

Non Thermal Plasma ◽

Agriculture And Food

Mycotoxins cause adverse effects on human health. Therefore, it is of the utmost importance to confront them, particularly in agriculture and food systems. Non-thermal plasma, electron beam radiation, and pulsed light are possible novel non-thermal technologies offering promising results in degrading mycotoxins with potential for practical applications. In this paper, the available publications are reviewed—some of them report efficiency of more than 90%, sometimes almost 100%. The mechanisms of action, advantages, efficacy, limitations, and undesirable effects are reviewed and discussed. The first foretastes of plasma and electron beam application in the industry are in the developing stages, while pulsed light has not been employed in large-scale application yet.

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