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Nanda S.P.,Jagannath Institute for Technology and Management | Padhy A.K.,National Institute of Science and Technology | Dey R.K.,Ravenshaw University
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2011

6a, 6b-diphenyl-tetrahydro-2a, 4a-diaza-cyclopenta[cd]pentalene-2, 5-dione and 2, 5-diamino-6a, 6b-diphenyl-3, 4, 6a, 6b-tetrahydro-2a, 4a-diaza-cylcopenta [cd] pentalene-1, 6-dicarbonitriles were prepared using simple laboratory procedure. The synthesized compounds were evaluated for their potential biological activity.

Parvathi K.,Jagannath Institute for Technology and Management | Rao B.S.P.,Gandhi Institute of Technology and Management | Rao T.V.,Andhra University | Reddy K.M.,Andhra Pradesh State Remote sensing Center
International Journal of Remote Sensing | Year: 2010

Most of the research in remote sensing is focused on developing a well-defined and reliable automated process for the extraction of information from different types of imagery. This paper deals with the extraction of linear anthropogenic objects (especially buildings) in hilly areas. The analysis of digital surface models from hilly terrain data is still challenging, especially for highly sloped landscapes. Commonly, the first task to study satellite data is to separate ground and object points as a preparatory step for further object classification. In this paper, object and ground separation in hilly terrain (PAN image of Indian Remote Sensing (IRS)-1C satellite) is addressed by employing wavelets. Then the extraction of desired objects (buildings) is done by employing the marker-controlled watershed segmentation. Experimental results demonstrate the method to be effective. © 2010 Taylor & Francis.

Kumar G.,National Institute of Technology Rourkela | Panda A.-K.,National Institute of Technology Rourkela | Panda A.-K.,Jagannath Institute for Technology and Management | Singh R. K.,National Institute of Technology Rourkela
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | Year: 2010

The pyrolysis of eucalyptus wood was carried out in a batch reactor to optimize the yield of bio-oil. Effect of various parameters like feed (particle) size, temperature, presence of catalyst and heating rate on the yield of bio-oil was investigated. The optimum conditions for high yield of bio-oil are for the particle size 2mm~5mm (average l/d=12.84/2.03mm) at 450°C in high heating rate. The reaction kinetics and the quality of bio-oil produced are independent of the presence of different catalysts like mordenite, kaoline clay, fly ash and silica alumina. The physical properties like odour, colour, PH, viscosity, heating value were determined. The FT-IR analysis of bio-oil indicates the presence of different functional groups such as monomeric alcohol, phenol, ketones, aldehydes, carboxylic acid, amines, and nitro compounds. The composition of the bio-oil at different conditions was analyzed using GC-MS and found that the components are temperature dependent but independent of catalysts used.

Padhy A.K.,National Institute of Science and Technology | Pati A.,National Institute of Science and Technology | Nanda S.P.,Jagannath Institute for Technology and Management | Dey R.K.,Ravenshaw University
Asian Journal of Chemistry | Year: 2011

The TLC monitored reaction of 2,2'-dithiobisbenzothiazole with 2,3-dithiopropanol resulted in the formation of unsymmetrical disulfides i.e., 2,3-bis(2-benzothiazolyldisulfanyl)-1-propanol (3). The molecule is characterized using proton NMR study. The molecular model study of the compound 3 reveals the proximity of the -OH proton to the nitrogen atom of the benzothiazole ring providing the probable hydrogen bond formation which is further confirmed by the study of hydrogen-deuterium exchange reaction.

Panda A.K.,National Institute of Technology Rourkela | Panda A.K.,Centurion Institute of Technology | Mishra B.G.,National Institute of Technology Rourkela | Mishra D.K.,Jagannath Institute for Technology and Management | Singh R.K.,National Institute of Technology Rourkela
Colloids and Surfaces A: Physicochemical and Engineering Aspects | Year: 2010

Natural kaolin was refluxed with sulphuric acid of different concentrations 1M, 3M, 5M and 10M at 110°C for 4h followed by calcination at 500°C for 2h. The physico-chemical characteristics of acid-leached kaolinite clay were studied by XRF, XRD, FTIR, TGA, DTA, SEM and N 2 adsorption techniques. XRF and FTIR studies indicate that acid treatment under reflux conditions leads to the removal of the octahedral Al 3+ cations along with other impurities. XRD of 5M and 10M treated kaolin shows that treatment with high concentrated acid provoked an amorphization resulting in the formation of an amorphous silica type phase. Leaching of Al 3+ ions increased progressively with severity of the acid treatment. The acid treatment increased the Si/Al ratio from 0.65 to 8.09, surface area from 23m 2/g to 143m 2/g and pore volume from 0.361cc/g to 1.18cc/g as the acid concentration was increased to 10M. Solids thus obtained by acid treatments can be used as promising adsorbents and catalyst supports. © 2010 Elsevier B.V.

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