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C. Ningappa J. Sannappa M. S. Chandrashekara L. Paramesh 《Indian Journal of Physics》2009,83(8):1201-1207
The radon survey was performed in granite quarries around Bangalore rural district and Bangalore city as part of a lung cancer
epidemiological study. Long duration measurements of indoor and outdoor radon, thoron and their progenies concentrations were
made around granite quarries of Bangalore rural district by using Solid State Nuclear Track Detector (SSNTD, LR-115, Type-II
Plastic track detector) during summer and winter period (2006–07). The increase of radioactivity in granite quarries and inhalation
dose to workers and populations near the quarries have been summarized. The higher concentrations of radon and thoron in granite
quarries suggest radiation health effects on workers and public around the quarries is higher than permissible levels. The
results are presented and analyzed with reference to ICRP limits. 相似文献
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Malledevarapura Gurumurthy Prabhudeva Karthik Kumara Achutha Dileep Kumar Mylarappa B. Ningappa Neratur K. Lokanath Kariyappa Ajay Kumar 《Research on Chemical Intermediates》2018,44(11):6453-6468
Increasing instances of antimicrobial drug resistance and Inflammation-mediated disorders requires the design and synthesis of new small-molecules with higher affinity and specificity for their potential targets to serve as antibiotics or anti-inflammatory drugs, respectively. The current study presents the synthesis of a series of chalcones, 3(a–h) by the reaction of 3-methylthiophene-2-carbaldehyde, 1 and acetophenones, 2(a–h) by Claisen–Schmidt approach. The chalcones were efficiently transformed into thienyl-pyrazolines, 5(a–h) by their reaction with thiosemicarbazide hydrochloride, 4 in the presence of Amberlyst-15 as a catalyst in acetonitrile at room temperature. Alternatively, the compounds 5(a–h) were prepared by conventional method using acetic acid (40%) medium. Structures were characterized by spectral and single crystal X-ray diffraction studies. Preliminary assessment of the anti-inflammatory properties of the compounds showed that, amongst the series, compounds 5b and 5c have excellent anti-inflammatory activities. Further, compound 5c showed excellent activity against Escherichia coli (MIC, 15 µg/mL), Bacillus subtilis (MIC, 20 µg/mL), Aspergillus niger (MIC, 20 µg/mL), and Aspergillus flavus (MIC 15 µg/mL), respectively. Compounds 5a and 5b were also found to be active against the tested microorganisms. 相似文献
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Niranjan R. S. Ningappa C. Yashaswini T. Chamaraja N. A. Rangaswamy D. R. Sannappa J. 《Journal of Radioanalytical and Nuclear Chemistry》2017,314(1):321-331
Concentrations of radon in drinking water collected from 32 locations of Hemavathi river basin, Karnataka, India have been measured by emanometry method. The radon concentration in water ranged from 2.7 ± 0.1 to 138.5 ± 1.5 Bq l−1 with a geometrical mean of 25.3 ± 1.1 Bq l−1. The study revealed that about 82.35% of drinking water samples contained radon concentration more than 11.1 Bq l−1, the limit is fixed by Environmental Protection Agency. Among the different parameters measured, concentration of radon showed weak correlation with chloride and no correlation with alkalinity, pH, nitrate, sulphate, fluoride and total dissolved substance.
相似文献5.
R. S. Niranjan C. Ningappa T. Yashaswini 《Journal of Radioanalytical and Nuclear Chemistry》2018,315(3):603-611
The activity concentration and total annual effective dose of the terrestrial naturally occurring radionuclides (232Th, 226Ra and 40K) were measured in soil and rock samples collected from various locations of Hemavathi river basin in Karnataka, using HPGe detector. The results revealed that activity concentration of radionuclides 226Ra, 232Th and 40K in the soil had geometrical mean values of 16.7 ± 0.6, 33.9 ± 1.2 and 359.9 ± 9.2 Bq kg?1, respectively. In rock samples activity concentrations of 226Ra, 232Th and 40K had geometrical mean values of 20.2 ± 0.7, 18.0 ± 0.9 and 276 ± 9.6 Bq kg?1, respectively. The external Hazard index and indoor hazard index were found to be within safety limits prescribed by European commission 1999 report. 相似文献
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