scholarly journals RADIATION GRAFTING OF STYRENE ONTO PTFE FILM

2010 ◽  
Vol 6 (1) ◽  
pp. 20-26
Author(s):  
Yohan Yohan ◽  
Rifaid M. Nur ◽  
Lilik Hendrajaya ◽  
E. S. Siradj
Keyword(s):  
Fuel Cell ◽  
Optimum Condition ◽  
Dose Rate ◽  
Irradiation Dose ◽  
Radiation Grafting ◽  
Solvent Concentration ◽  
Ptfe Film ◽  
Styrene Monomer ◽  
Styrene Concentration

Radiation grafting of styrene monomer onto poly(tetrafluoroethylene) (PTFE) film has been investigated. This research is emphasized on the conditioning of PTFE film. It was irradiated by -ray radiation at various irradiation dose from 2.5 - 12.5 kGy with dose rate 1.9 kGy/hour. Irradiated copolymer was then grafted by styrene monomer under various conditions. The results showed that degree of grafting increased by increasing irradiation dose, solvent concentration, temperature and time of grafting. The optimum condition of radiation grafting relatively was obtained at irradiation dose of 10 kGy, 2-propanol solvent, styrene concentration of 40 volume%, temperature and time of grafting of 70 oC and 6 hours each.   Keywords: Radiation grafting, PTFE, Fuel cell

Assessment of Absorbed Irradiation Dose Rate 137Cs by Emerged Plants in Oligotrophic and Eutrophic Water Bodies

2019 ◽  
Vol 55 (5) ◽  
pp. 100-106
Author(s):  
Ye. N. Volkova ◽  
V. V. Belyayev ◽  
S. P. Prishlyak ◽  
A. A. Parkhomenko
Keyword(s):  
Dose Rate ◽  
Irradiation Dose ◽  
Water Bodies ◽  
Eutrophic Water ◽  
Irradiation Dose Rate

scholarly journals Effects of gamma irradiation dose-rate on sterile male Aedesaegypti

2017 ◽  
Author(s):  
Beni Ernawan ◽  
Usman Sumo Friend Tambunan ◽  
Irawan Sugoro ◽  
Hadian Iman Sasmita
Keyword(s):  
Gamma Irradiation ◽  
Dose Rate ◽  
Irradiation Dose ◽  
Sterile Male ◽  
Irradiation Dose Rate

Comparisons of Cobalt-60 Gamma Irradiation Dose Rates on Grapefruit Flavedo Tissue and on Mexican Fruit Fly Mortality

1990 ◽  
Vol 53 (4) ◽  
pp. 329-331 ◽  
Author(s):  
GENE E. LESTER ◽  
DAN A. WOLFENBARGER
Keyword(s):  
Gamma Irradiation ◽  
Dose Rate ◽  
Electrolyte Leakage ◽  
Irradiation Dose ◽  
Adult Emergence ◽  
Fruit Fly ◽  
Anastrepha Ludens ◽  
Mexican Fruit Fly ◽  
Dose Rates ◽  
Grapefruit Peel

Percent electrolyte leakage, a measure of membrane integrity, proved to be a good predictor (R2 = 0.99) of cobalt-60 gamma irradiation dose injury on mid-season ‘Ruby Red’ grapefruit Citrus paradisi (Macf.) flavedo tissue (peel). Percent electrolyte leakage on grapefruit peel following a dose-rate of 250 grays/1.0, 2.5, 5.0, and 25.0 min decreased as grays/min (dose-rate) decreased. Total phenols, a biochemical response to irradiation following 250 grays/1.0, 2.5, 5.0, and 25.0 min also decreased as dose-rate decreased, demonstrating that injury to grapefruit peel diminished as 250 grays of gamma irradiation/rate declined. Comparisons of 10 and 20 grays of cobalt-60 gamma irradiation showed that a dose-rate of 10 grays/0.25 min to naked 8-d old Mexican fruit fly Anastrepha ludens (Loew) larvae caused a 90% reduction of adult emergence. Whereas, at 20 grays the reduction was greater than 99% with dose-rates of 20 grays/0.25, 0.5, 1.0, or 100 min. These data show that a gamma irradiation dose capable of reducing fly emergence by >99% will maintain an inhibitory effect even at relatively lower dose-rates. Therefore, once a quarantine security treatment for Mexican fruit fly is established, a lower dose-rate will reduce adult emergence and should impart little damage to grapefruit peel tissue.

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