RADIOMETRIC CHARACTERIZATION OF THE DIFFERENT ENVIRONMENTAL COMPONENTS OF A HIGH BACKGROUND RADIATION AREA: A COMPREHENSIVE REVIEW
Published In: 4TH INTERNATIONAL CONFERENCE ON ADVANCES IN APPLIED SCIENCE AND ENVIRONMENTAL ENGINEERING
Author(s): ABDULRAHEEM A. KINSARA , EL-SAID I. SHABANA
Abstract: Airborne radiometric surveys showed that Aja heights, of granitic composition, represent a radiometric anomaly area and should be of interest for detail study in a purpose of radiation protection. Ground surveys and radiometric analysis of rocks, surface soil, building materials and groundwater samples have been conducted. Radon-222 has been measured in groundwater and in the atmosphere (indoor and outdoor) of the inhabited area. Root uptake of natural uranium by vegetation grown in farms lie in the foot of the granitic massif has been investigated. Ground surveys showed an average effective dose rate, due to terrestrial γ-radiation, of 1.49 mSv/y. This level is about 3.3 times greater than the world average external effective dose rate (0.46 mSv/y) that estimated in normal background areas. The average concentrations (249 and 383 Bq/kg, respectively) of 238U and 232Th in the collected rock samples were higher than their worldwide average (about 61 Bq/kg for both radionuclides) in gran
- Publication Date: 27-Sep-2015
- DOI: 10.15224/978-1-63248-068-2-08
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COORDINATION CHEMISTRY OF CU(II) WITH POLYVINYL ALCOHOL(PVA) AND SOME AMINO ACIDS AND DNA
Published In: 4TH INTERNATIONAL CONFERENCE ON ADVANCES IN APPLIED SCIENCE AND ENVIRONMENTAL ENGINEERING
Author(s): WAFAA M. HOSNY
Abstract: The acid-base equilibria of polyvinyl alcohol(PVA) is investigated. The stability constant values of the binary and ternary complexes formed in solution between polyvinyl alcohol, Cu(II), some amino acids and DNA were determined potentiomertically. The stability constants of the complexes are determined and the concentration distribution diagrams of the complexes are evaluated. The ligand and their metal chelates have been screened for their antimicrobial activities using the disc diffusion method against the selected bacteria and fungi. Binary and ternary complexes of copper(II) involving polyvinyl alcohol(PVA) and various biologically relevant ligands containing different functional groups, were investigated. The ligands (L) are amino acids and DNA constituents. The ternary complexes of amino acids and DNA are formed by simultaneous and stepwise processes respectively. The results showed the formation of Cu(PVA)(L) complexes with amino acids and DNA. Amino acids form both Cu(PVA)(L)
- Publication Date: 27-Sep-2015
- DOI: 10.15224/978-1-63248-068-2-09
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