Papers by Mohammad al-Masri
Analytica Chimica Acta, 2002
Journal of Radioanalytical and Nuclear Chemistry, 1998
Applied Radiation and Isotopes, 2007
Fallout of 210 Pb is of major importance to environmental studies bqth for dating lake and marine... more Fallout of 210 Pb is of major importance to environmental studies bqth for dating lake and marine sediments and as tracer for studying pollutant transport processes . Although there is now large data on 210 Pb fallout in the world [1 2], but there seems to be no data a ailable on 210 Pb flux in the Midd le East. In this work inventories and vertical profiles of 210 P have been measured in the soils of 51 sites distributed over the Syrian land. Results have shown that 210 Pb inventories in the collected cores were relaUvely uniform with few exceptions where erosion by heavy rain may have occurred in addition to high organic content in some cores. shows some of activity depth profiles of 210 Pb; all 21 0pb fallout component was estimated by subtracting the supported component from the measured total 210 Pb activity. 210 Pb inventories were determined usinf the method described by Smith [3] and found to vary between 478 Bq.m-2 and 13080 Bq rn-, which are relatively high. In addition
t D AFETY, TOMIC ENERGY COMMIS 10 ' OF YRJA. DAMASCUS. PO BOX 609 1. YRlA
Phosphate industry is considered to be one of the potential sources of natural radionuclide in Sy... more Phosphate industry is considered to be one of the potential sources of natural radionuclide in Syria. Most of the phosphate processed ore is exported in large quantities via one of the Syrian main ports (Tartous) situated on the east part of the Mediterranean Sea (34° 54 N 35° 52 E). Loading activities into ships have been carried out for more than 20 years. Dust carrying radioactivity is elevated and transported to the surroundings; most of the port area is affected. The impact of these loading activities on the marine environment has been evaluated. 21 0po and other natural radionuclides in seawater sediment and marine organisms have been determined.
The lack of information about radioactivity along the eastern part of the Mediterranean Sea (Syri... more The lack of information about radioactivity along the eastern part of the Mediterranean Sea (Syrian Coast), has urged the Atomic Energy Commission of Syria (AECS) to initiate marine environmental program in 1991. The main objective of this program was to determine radioactivity base line and to define the biota species (fish, algae, mussels and other5) distributed in the Syrian coast which can be used as Biomonitors.
Mediterranean Marine Science
The Indo-Pacific jellyfish Aequorea globosa Eschscholtz, 1829 was reported last year for the firs... more The Indo-Pacific jellyfish Aequorea globosa Eschscholtz, 1829 was reported last year for the first time in the Mediterranean Sea from Iskenderun Bay (S. Turkey). This jellyfish was observed in the coast of Syria, on 8 January 2012, during a regular monthly sampling program.
Science of The Total Environment, 1997
Radiation Physics and Chemistry, 1996
Journal of Radioanalytical and Nuclear Chemistry Articles, 1996
Journal of Environmental Radioactivity, 2003
Journal of Environmental Radioactivity, 2000
Journal of Environmental Radioactivity, 2006
Journal of Environmental Radioactivity, 2008
This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.
Journal of Environmental Radioactivity, 2014
This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.
Applied Radiation and Isotopes, 2005
Evaluation has been made of the distribution of hard scales containing naturally occurring radioa... more Evaluation has been made of the distribution of hard scales containing naturally occurring radioactive materials (NORM) in a range of oilfield equipment in Syrian oilfields. One hundred and fifty-two scale samples from oilfield equipment were collected and analysed for radioactivity, elemental and mineralogical compositions. The average 226 Ra, 228 Ra and 224 Ra concentrations in scales were found to be 174, 91 and 67 Bq g À1 , respectively; the highest value of 226 Ra was found to be 1520 Bq g À1 . A gradual increase in 226 Ra specific activity from down-hole tubulars to surface parts of the installations was observed. The 228 Ra/ 226 Ra mean activity ratio was observed to be 0.76, indicating a Th/ U mass ratio of about 2.3. This value can be considered a fingerprint for the Th/U mass ratio of the geological formation of the reservoir. Radium isotopic data were also used to estimate the age of the deposited scales using the 224 Ra/ 228 Ra activity ratio; the highest average age (5.3 years) was found to be in scales collected from valves. Multiple regressions of the data have shown that 226 Ra is more highly correlated with Ba and Sr content in scales (R 2 ¼ 0:92) than Ca. Around 77% of 226 Ra was found to be incorporated with anhydrate barium strontium sulphate (R 2 ¼ 0:93), solubility in water being very low to negligible; lower levels of radium isotopes were found in calcite. r
Applied Radiation and Isotopes, 2013
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Papers by Mohammad al-Masri