INTERNATIONAL RESEARCH JOURNAL OF SCIENCE AND ENGINEERING

59-69

Authors: Gupta Meera, Rathod Munika and Shrivastava AK

In the present paper we have studied the long term variation of various solar parameters with 11-year cyclic solar activity behavior. A detailed correlative study has been performed using the monthly data among the variety of solar activity (SA) parameters for example Sunspot Numbers (SSN), Solar Flux(SF, 10.7cm flux), Grouped Solar Flare (GSF), Solar Flare Index (SFI) and Coronal Index (CI) for last five 11-year solar cycle 20 to 24 ( the present solar cycle). The SSN is the prime SA parameter that shows higher degree of correlation with the other solar parameters; however the correlation coefficient and running cross correlation are concerned. The correlation analysis shows that the solar active parameters (or indices) exhibit a strong correlation between SSN-SF and distinct characteristic behavior of SSN for Group solar flare and solar flare indices (GSF and SFI). Presently, the slop of regression lines between SSN and GSF and those between SSN and SFI is found to decrease continuously with the progression of cycles (from solar cycle 20 to 24). It is also verify from the peak values of SSN and SFI. As well as, the significant peak differences on SSN-CI for even and odd cycles is clearly apparent.

76-80

Authors: Kedar RM, Deshmukh SA,Patil SD, UkeshCS and Agrawal NK.

The proposed work involves synthesis of some new imidzolones from bromo substituted oxazolones in presence of zeolite as a catalyst. The bromo substituted oxazolones in turn were obtained from bromo benzoyl glycine and variedly substituted aromatic aldehydes in presence of acetic anhydride and anhydrous sodium acetate. The eight variedly substituted compounds were prepared by this method. Reflux time in the synthesis of 5-imidazolones was significantly reduced by employing Zeolite as a catalyst. The characterisation of these compounds was made by chemical properties, elemental analysis as well as spectral analysis (like IR,1H-NMR). The synthesized compounds were screened for antimicrobial activity against the test organisms E.coli, S.typhi, P.vulgaris, B.subtilis, S.aurus and S.pneumoniae. The compounds containing -OCH3,-N(CH3)2,-NO2 and -OH group showed maximum activity against S.typhi B.subtilis and E.coli pathogens.