http://nopr.niscair.res.in/handle/123456789/8609 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/8792 Title: Crystal growth of some amino acids in gel: Crystallization of DL-serine and its characterization <br/> <br/>Authors: Ramachandran, E; Natarajan, S <br/> <br/>Abstract: DL-serine (C₃H₇NO₃) a neutral, genetically coded amino acid was crystallized in silica gel under suitable <i>p</i>H conditions by reduction of solubility method. The gel grown DL-serine crystals were characterized by density determination and X-ray powder diffraction. Fourier transform infrared spectroscopic studies and thermogravimetric analysis were also made. <br/> <br/>Page(s): 372-376 http://nopr.niscair.res.in/handle/123456789/8791 Title: Fourier transform infrared and FT-Raman spectra and normal coordinate analysis of aminobenzoesaeure <br/> <br/>Authors: Gunasekaran, S; Abitha, P <br/> <br/>Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> The infrared and Raman spectral studies and the normal coordinate analysis of aminobenzoesaeure (AB) have been presented. The Fourier Transform Infrared spectrum has been obtained in the region 4000-400 cm^-1 and the FT-Raman spectrum has been recorded over the range 3500-200 cm^-1. The spectra have been investigated in terms of various fundamental modes of vibration. The observed infrared and Raman spectra exhibit all the salient features reported in literature. Accuracy of the spectral line positions and their bandwidths are found to be satisfactory. The structure of the complex has been established on the basis of C_S symmetry. A normal coordinate analysis has been carried out following Wilson’s F.G.matrix method and a systematic set of potential constants has been evaluated. To check whether the chosen set of symmetric coordinates contribute maximum to the potential energy associated with the molecule, the potential energy distribution (PED) has been carried out. </smarttagtype></smarttagtype> <br/> <br/>Page(s): 329-334 http://nopr.niscair.res.in/handle/123456789/8790 Title: Origin of the X-ray satellite L<img src='/image/spc_char/alpha.gif' border=0>₄ for 48 <u><</u> Z <u><</u> 56 <br/> <br/>Authors: Misra, U D; Kumar, N <br/> <br/>Abstract: A more realistic criterion than that of Soni S N, <i style="">J Phys B</i>, 23 (1990) 117, has been proposed for the origin of X-ray satellites in general. The criterion has been used for the identification of different transitions in two hole atoms which contribute to the formation of the L<img src='/image/spc_char/alpha.gif' border=0>₄ satellite for 48 ≤ Z ≤ 56.<u></u> <br/> <br/>Page(s): 341-344 http://nopr.niscair.res.in/handle/123456789/8789 Title: Specific heat studies in glassy Se₇₈Ge₂₂ and Se₆₈Ge₂₂M₁₀ (M = Cd, In, Pb) alloys <br/> <br/>Authors: Tiwari, R S; Mehta, N; Shukla, R K; Agarwal, P; Kumar, A <br/> <br/>Abstract: The specific heat of glassy Se₇₈Ge₂₂ and Se₆₈Ge₂₂M₁₀ (M = Cd, In, Pb) alloys using differential scanning calorimetry (DSC) technique have been measured. An extremely large increase in the specific heat values has been observed at the glass transition temperature. It has also been found that the values of <i style="">C</i>_p below glass transition temperature and the difference of <i style="">C</i>_p values before and after glass transition (∆<i style="">C</i>_p) are highly composition dependent. This indicates that the additives used in the present study influence the structure of the binary alloy. Specific heat of the additive element is found to be important for the observed changes in the specific heat of the ternary alloys as compared to binary alloy. <br/> <br/>Page(s): 363-367