[en] A method to evaluate empirical values of L3 magnetic sub-state photoionisation cross-sections has been reported. Preliminarily, the method requires scanning of the existing experimental data on L X-ray fluorescence (XRF) cross-sections for energy dependence of Lα/Ll cross-section ratio. After assuring the energy dependence of Lα/Ll cross-section ratio, the ratio is used for the determination of the alignment parameter A2. Thus, the determined A2 value, along with the available data on the sub-shell photoionisation cross-sections σ_Li and the Coster-Kronig transition probabilities f_ij, is used to evaluate magnetic sub-state photoionisation cross-sections σ_Li(m) for m=((3)/(2)) and ((1)/(2)). The method has been used to evaluate L3 magnetic sub-state photoionisation cross-sections for four elements with Z≥82, from the measured L XRF cross-sections. To the best of our knowledge, until this date neither theoretical nor semi-empirical data on magnetic sub-state photoionisation cross-sections for these elements has been available, for comparison with such cross-section values and to establish the superiority of one data set over the others. (author)

[en] Full text: Theoretical calculations show that the atomic inner-shell vacancies created in different modes of atomic ionization are aligned in the vacancy state with total angular momentum j > 1/2. The principal of parity and time reversal invariance predicts the state with j=3/2 is the first state that shows alignment. The tractional difference in vacancy populations of its two magnetic sub-states, mj =1/2 and 3/2, is defined as alignment parameter A2 Bhattacharya (1995). To generate a comprehensive data on A2 at energies of experimental interest, threshold to 60 keV, calculations using the central field approach and a Coulomb potential for the development of atomic models and non-relativistic dipole approximation for the electron wave function have been made for some rare-earth elements. Current results mostly support the maximum and minimum limits of alignment quoted by Berezhko et al (1978). The trends of variation of A2 with energy are found similar to those reported by Oh and Pratt (1974)

[en] Genotoxicity of three toxic elements (chromium, cadmium, nickel) and a metalloid (arsenic) has been studied in a freshwater fish, Channa punctatus using micronuclei (MN) test, comet assay, and erythrocyte nuclear alterations (ENAs) as fingerprints of genotoxicity. These tests yielded different results suggesting involvement of different mechanisms for their genotoxicity. While highest frequency of blebbed nuclei was observed in chromium-treated fish (6.5 ± 0.76), lowest was observed in cadmium-treated fish (4.0 ± 1.0). Maximum number of notched nuclei was recorded in arsenic-treated fish (5.5 ± 1.15) whereas highest numbers of lobed nuclei were found in cadmium-treated fish (4.5 ± 0.13). These differences might be attributed to selective bioaccumulation and chemodynamics of each element. Other parameters used to determine genotoxicity viz.: lipid peroxidation and DNA damage also suggested different mechanisms of their genotoxicity. It is suggested that an integrative approach, using a battery of tests for determining genotoxicity, should be made while making environmental health risk assessment and ecotoxicological studies of these toxic elements.

[en] Zeolite and composites of zeolites materials shows greater potential against decontamination of CWA's simulents because of their some specific properties like adsorption, sorption, and ion-exchange. Synthesized LTA zeolite and its nano composites, a novel adsorbent for the decontamination against 2-CEPS and 2-CEES (HD- simulents). Crystalline size and morphology of zeolite and simulents are described with the help of SEM, GC-FID, and XRD analysis. Above characterization techniques reveals that decontamination process completes (90%) with in 7 hand neutralize the toxic compounds into nontoxic products which are not harmful for environment. (author)

[en] ObjectiveTo evaluate the diagnostic performance of 3 T lung magnetic resonance imaging (MRI) in children with allergic bronchopulmonary aspergillosis (ABPA).