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Thermal decomposition of irradiated casein molecules

Abstract

Non-isothermal studies were carried out using the derivatograph where thermogravimetry (TG), and differential thermogravimetry (DTG) measurements were used to obtain the activation energies of the first and second reactions for casein decomposition before and after exposure to gamma rays and fast neutrons. Cf- 252 was used as a source of fast neutrons associated with gamma rays. TG and DTG patterns were also recorded for casein samples before and after irradiation with 1 Gy gamma-rays of 0.662 MeV from Cs - 137. However, no change in a activation energies were observed after exposure to gamma-irradiation. On the other hand, the activation energies for first and second reactions were found to be smaller at 0.4 m Gy than that at lower and higher neutron doses. However, no change in activation energies was observed after {gamma} irradiation. It is concluded from the present study that destruction of casein molecules by low level fast neutron doses may lead to changes of shelf storage period milk. 3 figs., 1 tab.
Authors:
Aly, M A; Elsayed, A A [1] 
  1. Biophysics Dept., Faculty of Science, Cairo University, Giza (Egypt)
Publication Date:
Dec 31, 1996
Product Type:
Miscellaneous
Report Number:
INIS-EG-005; CONF-9611191-
Reference Number:
SCA: 070205; PA: AIX-28:059339; EDB-97:115892; SN: 97001844410
Resource Relation:
Conference: 3. radiation physics conference, Cairo (Egypt), 13-17 Nov 1996; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings of the third Radiation Physics Conference. Vol. 1; Gomaa, M.A.; El-Behay, A.Z.; Hassib, G.M.; El-Naggar, A.M. [eds.]; PB: 332 p.
Subject:
07 ISOTOPE AND RADIATION SOURCE TECHNOLOGY; CASEIN; DECOMPOSITION; DIFFERENTIAL THERMAL ANALYSIS; ACTIVATION ANALYSIS; CALIFORNIUM 252; CESIUM 137; EXPERIMENTAL DATA; FAST NEUTRONS; GAMMA RADIATION; NEUTRON FLUENCE; THERMOGRAPHY
OSTI ID:
521284
Research Organizations:
Atomic Energy Establishment, Cairo (Egypt)
Country of Origin:
Egypt
Language:
English
Other Identifying Numbers:
Other: ON: DE97639506; TRN: EG9700080059339
Availability:
INIS; OSTI as DE97639506
Submitting Site:
INIS
Size:
pp. 158-167
Announcement Date:

Citation Formats

Aly, M A, and Elsayed, A A. Thermal decomposition of irradiated casein molecules. Egypt: N. p., 1996. Web.
Aly, M A, & Elsayed, A A. Thermal decomposition of irradiated casein molecules. Egypt.
Aly, M A, and Elsayed, A A. 1996. "Thermal decomposition of irradiated casein molecules." Egypt.
@misc{etde_521284,
title = {Thermal decomposition of irradiated casein molecules}
author = {Aly, M A, and Elsayed, A A}
abstractNote = {Non-isothermal studies were carried out using the derivatograph where thermogravimetry (TG), and differential thermogravimetry (DTG) measurements were used to obtain the activation energies of the first and second reactions for casein decomposition before and after exposure to gamma rays and fast neutrons. Cf- 252 was used as a source of fast neutrons associated with gamma rays. TG and DTG patterns were also recorded for casein samples before and after irradiation with 1 Gy gamma-rays of 0.662 MeV from Cs - 137. However, no change in a activation energies were observed after exposure to gamma-irradiation. On the other hand, the activation energies for first and second reactions were found to be smaller at 0.4 m Gy than that at lower and higher neutron doses. However, no change in activation energies was observed after {gamma} irradiation. It is concluded from the present study that destruction of casein molecules by low level fast neutron doses may lead to changes of shelf storage period milk. 3 figs., 1 tab.}
place = {Egypt}
year = {1996}
month = {Dec}
}