http://nopr.niscair.res.in/handle/123456789/3123 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/3179 Title: Photoconductivity and photoluminescence studies of chemically deposited CdS-Se: CdCl₂, Ho/ Nd films <br/> <br/>Authors: Bhushan, Shashi; Oudhia, Anjali <br/> <br/>Abstract: Photoconductivity (PC) and photoluminescence (PL) emission spectra of different CdS-Se films doped with lanthanides Ho/ Nd, prepared by chemical bath deposition (CBD) method have been studied. The Scanning electron microscope (SEM), X-ray diffraction (XRD) and optical absorption spectral studies have been used for characterization. The PC studies show an enhancement in the photocurrent with the doping of flux and lanthanides. The PL emission spectra of undoped films show excitonic as well as donor-acceptor transitions, where as that of different doped films exhibit visible transitions between different energy levels of the impurities Ho and Nd. <br/> <br/>Page(s): 60-65 Mon, 29 Dec 2008 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/3159 Title: Numerical solution of unsteady flow of a radiating and chemically reacting fluid with time-dependent suction <br/> <br/>Authors: Reddy, S Raji; Srihari, K <br/> <br/>Abstract: The numerical solution of unsteady laminar, boundary layer flow of a viscous incompressible, electrically conducting fluid along a semi-infinite vertical plate, in the presence of thermal and concentration buoyancy effects has been obtained, using implicit finite difference method for velocity, temperature and concentration fields. The results for the velocity, temperature shear stress, Nusselt number and Sherwood-numbers have been obtained and discussed for different flow parameters such as Sc, Kr, Gr, Gm, NR and Pr. It has been found that an increase in the chemical reaction leads to decrease in the velocity and concentration boundary layer, but, an increase in the thermal radiation increases the velocity and temperature boundary layer. These results are found to be in good agreement with the previous results. <br/> <br/>Page(s): 7-11 Mon, 29 Dec 2008 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/3152 Title: FTIR, FT Raman spectra and molecular structural confirmation of isoniazid <br/> <br/>Authors: Gunasekaran, S; Sailatha, E; Seshadri, S; Kumaresan, S <br/> <br/>Abstract: Isoniazid (INH) is a first-line anti-tuberculous medication used in the prevention and treatment of tuberculosis with molecular formula C₆H₇N₃O. The FTIR and FT Raman spectra of Isoniazid have been recorded in the region 4000 -400cm⁻¹ and 3500 - 50 cm⁻¹, respectively. A detailed vibrational analysis has been made on the fundamental modes of vibration. The normal coordinate analysis has been carried out for INH following the Wilson’s FG matrix method on the basis of C₁ point group symmetry. A systematic set of potential constants has been evaluated using the method of kinetic constants and the evaluated potential constants have been compared with those of related molecules. To check whether the chosen set of vibrational frequencies contribute maximum to the potential energy associated with the normal coordinates of the molecule, potential energy distribution (PED) has been evaluated. <br/> <br/>Page(s): 12-18 Mon, 29 Dec 2008 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/3151 Title: Analysis of high pressure equations of state for solids <br/> <br/>Authors: Lal, K; Singh, C P; Chauhan, R S <br/> <br/>Abstract: Four equations of state for solids with adjustable parameter K'∞, the pressure derivative of bulk modulus at infinite pressure have been studied. These equations are the Keane EOS, the Stacey reciprocal K' - EOS, the generalized Rydberg EOS and the Roy-Roy EOS. It is found that the Keane EOS and the Stacey EOS are very similar requiring K'∞ to be considerably larger than 5/3. The generalized Rydberg EOS yields satisfactory results with a value of K'∞ = 5/3. For the Roy-Roy EOS, K'∞ has been found to remain between 5/3 and 2. This has been demonstrated by calculating P, K and K' for hcp iron at different compressions. <br/> <br/>Page(s): 28-31 Mon, 29 Dec 2008 22:58:59 GMT