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Chikmagalūr, India

Srinivasa E.,IDSG Government College | Rangaswamy D.R.,Kuvempu University | Sannappa J.,Kuvempu University
Journal of Radioanalytical and Nuclear Chemistry | Year: 2015

The radon concentration has been determined in 27 drinking water samples of Hassan district and was estimated by using emanometry technique and physicochemical parameters were estimated using standard techniques. The 222Rn concentrations in water are varying from 0.85 ± 0.2 to 60.74 ± 2.5 Bq l−1 with an average value of 26.5 ± 1.65 Bq l−1. This study reveals that 66 % of the drinking water samples have radon concentration level in excess of the EPA recommended maximum contamination level of 11.1 Bq l−1. There is no significant correlation noted between radon concentration and physicochemical parameters. The mean annual effective ingestion doses received from all samples are lower than 0.1 mSv y−1. © 2015, Akadémiai Kiadó, Budapest, Hungary.

Kumaraswamy M.N.,Sir Mv Government Science College | Vaidya V.P.,Kuvempu University | Chandrasekhar C.,Sdm College | Prathima Mathias D.A.,IDSG Government College | Mahadevan K.M.,Kuvempu University
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2013

The reaction of naphtho[2,1-b]furan-2-carbohydrazide 2, which in turn was synthesized from ethyl naphtho[2,1-b]furan-2carboxylate 1, with various aromatic aldehydes in refluxing dioxane afforded N-[(aryl)methylene]naphtho[2,1-b] furan-2-carbohydrazides 3a-f. These hydrazones 3a-f on treatment with chloroacetyl chloride in presence of triethylamine produced, title compounds, azetidinone derivatives 4a-f. The structures of the newly synthesized compounds have been established by analytical and spectral studies and investigated for antibacterial, antifungal, anti-inflammatory, diuretic, anthelmintic and antipyretic activities.

Makari Hanumanthappa M.,Bharathiar University | Makari Hanumanthappa M.,IDSG Government College | Palaniswamy M.,Karpagam University | Angayarkanni J.,Bharathiar University | Vinay Suvarna M.N.,Bharathiar University
International Journal of Pharma and Bio Sciences | Year: 2014

The aim of this research work was to analyze the genetic diversity of the lytic bacteriophages isolated against phytopathogenic Ralstonia solanacearum. The 16S rRNA sequence analysis was used for the identification of the bacteria. Four lytic phages: φHMPM12, φHMPMA12,φHMPMB12 and φHMPMC12 specific to R. solanacearum were isolated from sewage sample. The phage φHMPM12 was found more stable in all temperature ranges. Transmission electron microscopic (TEM) analysis was used to determine the morphology of the phages. Electronic microscopic images of phages revealed that bacteriophages have possessed icosahedral head shape of 45-55 nm in diameter and a non-contractile tail of 210-235 nm in length, these morphological similarities of the phages were represents the family Siphoviridae. The RAPD PCR technique was employed with primers OPC04 sequence 5′-CCGCATCTAC-3′ and OPC05 sequence 5′-GATGACCGCC-3′ series. The genomic fingerprinting of all the four phages by RAPD PCR revealed the distinct banding patterns. The findings of the study support the use of RAPD PCR technique for the quick typing of phage isolates and assessment of genetic diversity.

Rangaswamy D.R.,Kuvempu University | Srinivasa E.,IDSG Government College | Srilatha M.C.,Government First Grade College | Sannappa J.,Kuvempu University
Journal of Radioanalytical and Nuclear Chemistry | Year: 2016

This paper presents the distribution of radon activity concentration in drinking water samples and their annual effective dose exposure in Shimoga district. The radon concentrations in 38 drinking water samples were measured by using Emanometry technique. The measured radon concentration in drinking water samples ranged between 3.10 ± 0.25 and 38.50 ± 1.54 Bq l−1 with an average value of 13.60 ± 1.12 Bq l−1. This study reveals that 44.8 % drinking water samples analyzed have radon levels in excess of the EPA recommended maximum contamination level of 11.1 Bq l−1. The total mean annual effective doses of all the samples are significantly lower than the reference level of 0.1 mSv y−1. © 2015, Akadémiai Kiadó, Budapest, Hungary.

Rangaswamy D.R.,Kuvempu University | Srilatha M.C.,Government First Grade College | Ningappa C.,Vidya Vikas Institute of Engineering and Technology | Srinivasa E.,IDSG Government College | Sannappa J.,Kuvempu University
Environmental Earth Sciences | Year: 2016

The present study deals with the activity concentration of natural primordial radionuclides, namely 226Ra, 232Th, and 40K in different rock samples of Ramanagara and Tumkur districts, and has been studied by using gamma ray spectrometry. The average activity concentration of 226Ra, 232Th, and 40K in the collected rock samples was found to be 41.08 ± 2.12, 86.26 ± 2.94, and 869.29 ± 3.78 Bq.kg−1, respectively. The average radium equivalent activity (Raeq) was found as 225.29 Bq.kg−1 and these values are well within the recommended limit prescribed for dwellings as 370 Bq.kg−1. The external (Hex) and internal hazard index (Hin) values are also less than unity. The mean value of absorbed dose rate in rock samples was found as 107.33 nGy.h−1, respectively, and is slightly higher than the worldwide average value. The average indoor and outdoor annual effective dose values for rock samples are 0.526 mSv.y−1 and 0.131 mSv.y−1, respectively. These values are lower than the average world recommended value of 1 mSv.y−1. © 2016, Springer-Verlag Berlin Heidelberg.

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