Time filter

Source Type

Sunpriya Achary G.,Konark Institute of Science and Technology | Mohanty S.K.,State Pollution Control Board | Sahoo R.,Ravenshaw University | Pattanaik N.,State Pollution Control Board
Indian Journal of Environmental Protection | Year: 2012

The present study deals with the effect of urbanization and automobile emission on ambient air quality of Bhubaneswar city, Odisha. This paper examines the significant difference in seasonal variations of air pollutant concentrations in the city. RSPM (respirable suspended particulate matter), SPM (suspended particulate mater), sulphur dioxide (SO2), oxides of nitrogen (NOx) and CO were collected at 5 sites in Bhubaneswar. Monthly and seasonal variation of these pollutants are compared graphically for 2 consecutive year from November-08 to October-10. The annual average and range values have also been calculated. Using observed annual means and standard values of different parameters the exceedence factor for each pollutant was calculated in all selected locations. It has been observed that the concentrations of the pollutants are high in winter in comparison to summer or rainy seasons. In the present study it was noticed that the SPM, RSPM and CO levels at all selected sites exceeds the prescribed limits as stipulated by Central Pollution Control Board (CPCB). But the SO2 and NOx levels at all the sites found under prescribed limits of CPCB. From exceedence factor, the different pollutants are categorized into 4 categories. It was observed that RSPM at all locations for both the years fall under critical category. SPM in 2008-09 fall under critical category at 3 locations and rest 2 under high category. In 2009-10 SPM fall under high category for 4 locations and one location under critical category. SO2 at all locations in both the years are under low category. NOx in 2008-09 fall under moderate category at 3 locations and rest 2 locations in low category while in 2009-10 all locations fall under moderate category. CO in 2008-09 fall under critical category at 2 locations, high category at 2 locations and moderate at one location but in 2009-10 falls under critical category at 2 locations, high category at 2 locations and moderate at one location. © 2012 - Kalpana Corporation.

Padhi P.,Konark Institute of Science and Technology | Kar S.,Central Tool Room and Training Center
Journal of Nanotechnology | Year: 2011

Addition of nano particles, even in quantities as small as 2 weight percent can enhance the hardness or yield strength by a factor as high as 2. There are several methods for the production of metal matrix nanocomposites including mechanical alloying, vertex process, and spray deposition and so forth. However, the above processes are expensive. Solidification processing is a relatively cheaper route. During solidification processing, nano particulates tend to agglomerate as a result of van der Waals forces and thus proper dispersion of the nano particulate in metal matrix is a challenge. In the present study a noncontact method, where the ultrasonic probe is not in direct contact with the liquid metal, was attempted to disperse nanosized SiC particulates in aluminum matrix. In this method, the mold was subjected to ultrasonic vibration. Hardness measurements and microstructural studies using HRTEM were carried out on samples taken from different locations of the nanocomposite ingot cast by this method. © 2011 Payodhar Padhi and Sachikanta Kar.

Achary G.S.,Konark Institute of Science and Technology | Mohanty S.K.,State Pollution Control Board | Sahoo R.,Ravenshaw University
Indian Journal of Environmental Protection | Year: 2011

Due to rapid urbanization of Bhubaneswar city, the population load is increasing sharply day by day. As a result ,the requirement of water for human activities is increasing. In return a huge amount of wastewater is generated and discharged into river Kuakhal and make it polluted. Thus people are forced to use ground water which is known to be safe for drinking. At present 40% people of Bhubaneswar depend on ground water. But unfortunately the ground water Is also getting polluted day by day. So it is high time to assess the ground water quality in Bhubaneswar. Nine different locations were chosen depending on population load and to cover all parts of Bhubaneswar .The samples were collected quarterly in the month of January-09, May-09 and September-09 to determine different physical, chemical and biological parameters. The seasonal variations of different parameters have been compared with the standard. From the results mean, standard deviation; correlation coefficient among different parameters has been studied. It is found that total hardness is highly correlated with chloride, conductivity and total dissolved solids. Similarly chloride is highly correlated with conductivity and total dissolved solids. Conductivity and total dissolved solids are highly correlated. The results are compared with standard values. © 2011 - Kalpana Corporation.

Behera D.K.,Konark Institute of Science and Technology | Behera P.M.,Siksha O' Anusandhan University | Acharya L.,Siksha O' Anusandhan University | Dixit A.,Institute of Life science | Padhi P.,Konark Institute of Science and Technology
Journal of Biomedicine and Biotechnology | Year: 2012

Influenza is an infectious disease caused by RNA viruses of the family Orthomyxoviridae. The new influenza H1N1 viral stain has emerged by the genetic combination of genes from human, pig, and bird's H1N1 virus. The influenza virus is roughly spherical and is enveloped by a lipid membrane. There are two glycoproteins in this lipid membrane; namely, hemagglutinin (HA) which helps in attachment of the viral strain on the host cell surface and neuraminidase (NA) that is responsible for initiation of viral infection. We have developed homology models of both Hemagglutinin and Neuraminidase receptors from H1N1 strains in eastern India. The docking studies of B-Sialic acid and O-Sialic acid in the optimized and energy-minimized homology models show important H-bonding interactions with ALA142, ASP230, GLN231, GLU232, and THR141. This information can be used for structure-based and pharmacophore-based new drug design. We have also calculated ADME properties (Human Oral Absorption (HOA) and HOA) for Oseltamivir which have been subject of debate for long. © 2012 Deepak Kumar Behera et al.

Padhi P.,Research and Development Center | Rout S.K.,Konark Institute of Science and Technology | Panda D.,Research and Development Center
Bulgarian Chemical Communications | Year: 2014

Structural modification of zeolite A was carried out using sodium carboxymethylcellulose (CMC). The product was characterized by XRD, FTIR, FESEM, EDAS and HRTEM. As a result of the modification reaction carried out at a temperature of 80°C, the particle size of zeolite A was reduced to 668.1 nm. The particle shape changed as a result of calcination after sonication. © 2014 Bulgarian Academy of Sciences, Union of Chemists in Bulgaria.

Discover hidden collaborations