http://nopr.niscair.res.in/handle/123456789/9012 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/9580 Title: Vibrational spectra and molecular structural investigation of quiniodochlor <br/> <br/>Authors: Gunasekaran, S; Ponnambalam, U; Muthu, S; Anand, G <br/> <br/>Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> A normal coordinate analysis on quiniodochlor has been carried out with a systematic set of symmetry coordinates following Wilson's F-G Matrix method. The potential constants evaluated for the molecule are found to be in good agreement with literature values thereby confirming the vibrational assignments. To check whether the chosen set of vibrational frequencies contribute maximum to be potential energy associated with the normal coordinates of the molecule, the potential energy distribution has been evaluated. </smarttagtype></smarttagtype> <br/> <br/>Page(s): 162-166 Fri, 27 Feb 2004 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/9579 Title: Effective mass calculation for InSe, InSe:Ho_0.0025, InSe:Ho_0.025, InSe:Ho_0.005and InSe:Ho_0.05 samples using the external electric field shifting <br/> <br/>Authors: ATEŞ, Aytunç <br/> <br/>Abstract: Undoped InSe and Ho doped InSe single crystals were grown by Bridgman-Stockberger method. The InSe crystals both undoped and doped with different ratios of  (InSe:Ho_0.0025, InSe:Ho_0.025, InSe:Ho_0.005and InSe:Ho_0.05) had no cracks or voids on the surface. No polishing or cleaning treatments were carried out on the cleaved faces of these samples because of the natural mirror-like cleavage faces. The absorption measurements were carried out in the temperature range 10-320 K and the external electric field effect on the absorption measurements was investigated. The absorption edge shifted towards the longer wavelengths under an electric field as  6 kV/cm. Using the electric field shits, effective mass values are calculated for all the samples. <br/> <br/>Page(s): 205-210 Fri, 27 Feb 2004 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/9578 Title: Radiological impact of airborne radon and its progeny in dwellings <br/> <br/>Authors: Kant, K; Chakarvarti, S K <br/> <br/>Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> Measurement of indoor radon and its progeny levels was carried out in some typical dwellings made up of baked mud bricks, fly ash bricks, concrete blocks and mud houses using LR-115, Type II plastic track detectors in various districts of Haryana. The Potential Alpha Energy Concentration (PAEC) varied from 4.36 to14.53 mWL; Equilibrium Equivalent Concentration (EEC) of radon varied from 40.33 to 134.40 Bq m^-3; annual exposure varied from 0.18 to 0.60 WLM; annual effective dose varied from 0.69 to 2.31 mSv and life-time fatality risk varied from 0.54 <img src='/image/spc_char/cross.gif' border=0>10^-4to 1.8 <img src='/image/spc_char/cross.gif' border=0>10^-4in the environment of dwellings in various districts of Haryana. The effect of various parameters on radon concentration such as seasonal variation and type of building materials was also studied. The radon concentration in industrially polluted cities like Faridabad, Panipat, Rewari, Yamun Nagar was found to be more. The measured radon and its progeny levels were the highest in winter season. In the measurements, we found that radon concentration was the maximum in fly ash houses. </smarttagtype></smarttagtype> <br/> <br/>Page(s): 157-161 Fri, 27 Feb 2004 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/9577 Title: Surface morphology of gall bladder stones <br/> <br/>Authors: Singh, V R; Kaur, Palwinder <br/> <br/>Abstract: Gall bladder stones are crystalline structures formed by concretion or accretion of normal or abnormal bile constitutents. These stones are normally made of cholesterol, calcium, phosphate, carbonate and proteins. The aetiology of gall bladder stones is multifactoral. Scanning electron microsscopy (SEM) is used here to investigate the surface features of the mechanically fractured part of the stone samples. Micrographs exhibit a non uniform polycrystalline surface without specific grain boundaries with porosity, leading to loose bounding of crystals and hence low specific gravity. These results pertaining to surface characterisation are very useful for understanding the disintegration process of stones inside or outside the human body. <br/> <br/>Page(s): 189-194 Fri, 27 Feb 2004 22:58:59 GMT