Zobrazeno 1 - 10
of 28
pro vyhledávání: '"R Hewamanna"'
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 270:657-660
Elemental concentration of nineteen Ayurvedic drugs have been measured using energy dispersive X-ray fluorescence analysis. Concentrations of nineteen elements: Si, P, S, Cl, K, Ca, Ti, Cr, Mn, Fe Ni, Cu, Zn, As, Br, Rb, Sr, Zr and Hg have been deter
Publikováno v:
Journal of Environmental Radioactivity. 16:167-180
A theoretical scheme is presented which considers the uptake of radiocaesium by roots of wheat and its subsequent translocation to above ground tissues. This is tested experimentally against data derived for actively growing plants in the presence of
Autor:
R. Hewamanna, P. Mahawatte
Publikováno v:
International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements. 19:775-780
Deposits of monazite bearing soils occur along the Southwest, West and East Coasts of Sri Lanka. High levels of gamma activity in some plant species growing in the West Coast have been reported. The high levels were due to the presence of the daughte
Publikováno v:
Journal of the National Science Foundation of Sri Lanka. 42:137
The treatment of thyroid cancer generally comprises total thyroidectomy and oral administration of radioiodine (131I). One consideration in this therapy is the radiation exposure risks, which have led the Sri Lankan Regulatory Authority to lay down c
Publikováno v:
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine. 54(2)
The specific radioactivity concentrations of 226Ra, 232Th and 40K have been determined by gamma ray spectrometry with an HPGe detector in clay brick samples from kiln sites located in 17 towns. The average values of the measured activities are 35, 72
Publikováno v:
Biological trace element research.
Air particulate matter of two size fractions (coarse [2.5-10 microns] and fine [less than 2.5 microns]) were collected at an urban residential site (Colombo University ground) over a period of 12 mo during 1996 using a Gent PM10 stacked filter unit.
Autor:
R Hewamanna, CS Sumithrarachchi
Publikováno v:
Sri Lankan Journal of Physics. 2:1
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Publikováno v:
Sri Lankan Journal of Physics. 1:73
Autor:
M.P. Dias, R. Hewamanna
Publikováno v:
Journal of the National Science Foundation of Sri Lanka. 27:49
Keywords: Caesium 137 , infants, milk powder, radiation dose Doi: 10.4038/jnsfsr.v27i1.2976 J.Natn.Sci.Foundation Sri Lanka 1999 27 (1) 49-54
Publikováno v:
Environmental and Experimental Botany. 28:137-143
The behavior of radium, one of the main natural radionuclides which enters the food chain, was investigated in plants growing in monazite-bearing soils. Massive accumulation of radium was observed to occur in the roots. The quantity of radium translo