Radiolytic degradation of methoxychlor in methanol and monitoring of radiolytic products by HPLC and GC-MS

2010 ◽  
Vol 98 (5) ◽  
Author(s):  
Shahid Bilal Butt ◽  
Muhammad Riaz
Keyword(s):  
Radiation Dose ◽  
Gamma Radiation ◽  
Degradation Products ◽  
Organic Pollutant ◽  
Reversed Phase ◽  
Methanol Solution ◽  
Reversed Phase Hplc ◽  
Experimental Conditions ◽  
Radiolytic Degradation ◽  
Gamma Radiation Dose

AbstractDegradation of priority organic pollutant methoxychlor in methanol solution by gamma irradiation under varied experimental conditions has been optimized. The solution of methoxychlor was air saturated before irradiation. The extent of radiolytic degradation efficiency was monitored by reversed phase HPLC-UV; two major and two minor degradation products were detected. For 5 kGy gamma radiation dose at a rate of 200 kGy h

Optimization of gamma radiation dose for induction of mutations in okra

2021 ◽  
pp. 1-11
Author(s):  
Soham Hazra ◽  
Shouvik Gorai ◽  
V Umesh Kumar ◽  
Sudip Bhattacharya ◽  
Anirban Maji ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Gamma Radiation ◽  
Gamma Radiation Dose

scholarly journals Terrestrial Gamma Radiation Dose Rate of West Sarawak

2017 ◽  
Vol 156 ◽  
pp. 00006
Author(s):  
A. Izham ◽  
A.T. Ramli ◽  
W.M. Saridan Wan Hassan ◽  
H.N. Idris ◽  
N.A. Basri
Keyword(s):  
Radiation Dose ◽  
Gamma Radiation ◽  
Dose Rate ◽  
Radiation Dose Rate ◽  
Gamma Radiation Dose

Terrestrial Gamma Radiation Dose in Hong Kong

1992 ◽  
Vol 62 (1) ◽  
pp. 77-81 ◽  
Author(s):  
Man-Yin W. Tso ◽  
Chung-Chum Li
Keyword(s):  
Hong Kong ◽  
Radiation Dose ◽  
Gamma Radiation ◽  
Gamma Radiation Dose

The rain induced gamma-radiation dose rate enhancement at Järvselja SMEAR station

2021 ◽  
Author(s):  
Urmas Hõrrak ◽  
Xuemeng Chen ◽  
Kristo Hõrrak ◽  
Uko Rand ◽  
Kaupo Komsaare ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Gamma Radiation ◽  
Dose Rate ◽  
Atmospheric Aerosol ◽  
Aerosol Particles ◽  
Aerosol Formation ◽  
Radiation Dose Rate ◽  
Air Mass ◽  
Rate Enhancement ◽  
Gamma Radiation Dose

<p>The SMEAR Estonia station (58.277663 N, 27.308266 E, 36 m a.s.l.) was established in south-east of Estonia at the Järvselja Experimental Forestry in 2012 to investigate the atmosphere-biosphere interactions and atmospheric aerosol formation and growth.</p><p>In summer 2019, the gamma-radiation monitor GammaTRACER XL2-3 (Saphymo GmbH) was set up at Järvselja station and the rain sensor DRD11A (Vaisala Oyj) in autumn 2019. These devices enable to measure the gamma-radiation dose rate and precipitation intensity, which affect the ionization rate of atmospheric air close to ground, with high accuracy and time resolution, and complement our measurement system of atmospheric ions and aerosol particles.</p><p>The gamma-radiation dose rate measurements at about 1.2 m above the ground reveled on relatively steady background about 70 nSv/h occasional events with increase up to about 110 nSv/h, which correlated well with rainfall intensity. Commonly such events last 3-4 hours, but in specific meteorological situation with continuous long-lasting rain and air mass movement from southerly directions the effect can last 2-3 days, resulting in gradual increase in gamma-radiation dose rate level during about 24 h.</p><p>Such a phenomenon is known to occur due to wet deposition of radioactive aerosol particles during rain, namely due to the radon (<sup>222</sup> Rn) short-lived daughter progeny products (Po-218, Pb-214, Bi-214) attached to atmospheric aerosol particles. The radon (<sup>222</sup> Rn) daughter progeny involvement is confirmed by simultaneous gamma-spectrometric measurements with SARA AGS711F (Envinet GmbH) at Tõravere station (58° 15' 52,9" N, 26° 27' 42,1", 72 m), located about 50.3 km west from the Järvselja SMEAR station. The gamma dose rates showed very similar temporal behavior when both stations were affected by the same air mass with precipitation zone passing over the stations.</p><p>To our best knowledge, the details of rain-induced enhancement of gamma-radiation dose rate and atmospheric processes behind the phenomenon are not well known and are worth future investigations. The events of rain induced gamma-radiation dose rate enhancement at Järvselja SMEAR and Tõravere station are analyzed and discussed in more detail in the presentation and the spatial representativity of the phenomenon is estimated based on the gamma-radiation monitoring network data of Estonian Early Warning System.</p>

scholarly journals Spatial distribution of gamma radiation dose rates from natural radionuclides and its radiological hazards in sediments along river Iju, Ogun state Nigeria

MethodsX ◽  
2020 ◽  
Vol 7 ◽  
pp. 101086
Author(s):  
Omeje Maxwell ◽  
Adewoyin Olusegun O. ◽  
Joel Emmanuel S. ◽  
Ikechukwu Ijeh B. ◽  
Omeje Uchechukwu A. ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Radiation Dose ◽  
Gamma Radiation ◽  
Natural Radionuclides ◽  
Dose Rates ◽  
Ogun State ◽  
Radiological Hazards ◽  
Gamma Radiation Dose

Terrestrial gamma radiation dose rates (TGRD) from surface soil in Negeri Sembilan, Malaysia

2014 ◽  
Vol 104 ◽  
pp. 112-117 ◽  
Author(s):  
Nor Eliana Norbani ◽  
Nazaratul Ashifa Abdullah Salim ◽  
Ahmad Saat ◽  
Zaini Hamzah ◽  
Ahmad Termizi Ramli ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Gamma Radiation ◽  
Surface Soil ◽  
Dose Rates ◽  
Gamma Radiation Dose
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