Dose distribution of gamma radiation in a new geometric configuration of a standard carton date package and its experimental application for disinfestation of packed dates
✍ Scribed by M.S.H. Ahmed; A.A. Al-Taweel; A.A. Hameed
- Book ID
- 103990622
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 887 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0969-806X
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✦ Synopsis
A new geometrical configuration composed of three standard carton boxes (SCBs) full with polyethylene bags (PBS), where each bag contains 1 kg of date, was placed on a single turntable of Gammabeam-and irradiated with low doses. The mean "radiation absorbed dose" for disinfestation of this geometrical unit at 15 equally distributed positions (Fricke dosimeters) inside 3 SCBs put on a single turntable was calculated to be 0.46 f 0.20 kGy and dose uniformity ratio (V) = 1.0019/0.2500 = 4.00. The development and genetic tests carried out on insects found in the PBS 1-2 days after irradiation resulted in that all insects were completely sterile and died within a short period of time. No sign of any reinfestation was recorded at all in the treated packages even after 30 days of storage in an insectory. Apparently the prevention of insects from invading and/or penetrating the date packages is due mainly to the new combination of standard carton boxes that are widely used for commercial purposes and hermetically heat-sealed polyethylene bags of dates in addition to the entire prevention of reproduction induced by the "low" doses of y radiation. Therefore, by using similar geometrical configuration, 18 big standard carton date packages can be simultaneously disinfested, using the same range of doses or so, by utilizing all the 6 turntables inside the radiation chamber of the Gammabeam-irradiation facility.
INTRODUCIION