http://localhost:8080/xmlui/handle/123456789/1058 2026-04-26T08:15:09Z http://localhost:8080/xmlui/handle/123456789/2946 Title: Removal of Cr(VI) Ions from Aqueous Solution by Using Syzygium cumini Seeds† Authors: Laxminarayana, K.; Reddy, K.L. Abstract: The present study deals with the removal of Cr(VI) ions from aqueous solution by using syzygium cumini seeds. Batch adsorption studies showed that Syzygium cumini seeds was able to adsorb Cr(VI) ions from aqueous solutions. The maximum adsorption capacity was found to be 253.16 mg g-1 with 0.1 g of sorbent dosage at pH 2. The effect of pH, contact time, sorbent dosage and temperature have been studied. The adsorption of Syzygium cumini seeds was best fitted by the Langmuir adsorption isotherm and it follows pseudo second order kinetics. Description: NITW 2012-01-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/2812 Title: Catalytic Degradation of Rhodamine B over FeMCM-41 Authors: Nookaraju, M.; Rajini, A.; Venkatathri, N.; Reddy, I.A.K. Abstract: Fe incorporated MCM-41 (FeMCM-41) is synthesized at room temperature by instant mixing of silica and iron precursors to a clear solution of surfactant following co-precipitation method. It is characterized by various physico-chemical techniques like PXRD, BET, FT-IR and SEM. The mesoporous character of the material has been established from BET adsorption desorption studies. Degradation Rhodamine B in presence of hydrogen peroxide as oxidant over FeMCM-41 has been investigated. It is observed that 94.25 % of dye gets degraded in 150 min. It is found that degradation % increases with increase in pH and also with increase in the concentration of oxidant. Optimum conditions for the degradation of Rhodamine B by hydrogen peroxide over FeMCM-41 have been established. Description: NITW 2012-12-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/2213 Title: Performance evaluation of sink node selection for time synchronization in WSN Authors: Sai Prakash, S.K.L.V.; Reddy, Kondapalli S. Rami Abstract: Co-ordination among the nodes and having a common notion of clock are essential criterion for the effective functioning of Wireless Sensor Networks (WSN), demand critical time synchronization process. Nodes normally deployed goes unsynchronized due to the associated low cost crystal oscillators. The desired time co-ordination is obtained by frequent network-wide resynchronization. Tree formation among the nodes and the length of the branch defines the precision error as the error propagate along the branch. The frequency of resynchronization depends on the skew of these oscillators which is a parameter of the application. The energy the nodes bleed for synchronization, effects the lifetime of the network. The performance of network-wide time synchronization with respect to the energy efficiency and accuracy obtained based on the sink node selection in WSN is evaluated. Two sink node selection techniques were discussed and a comparative simulation study was carried out with respect to the lifetime of the network Description: NITW 2014-01-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/1569 Title: SYNTHESIS OF NEW ARYL IMIDAZOLE QUINOLINE-2-ONES Authors: Panakala Rao, G.V.; Rajitha, B.; Thirupathi Reddy, Y.; Narasimha Reddy P., P. Abstract: A series of some new aryl imidazole quinoline-2-ones have been synthesized by condensing N-[- (Z)-l-(Hydrazino carbonyl)-2-Phenyl vinyl]acetamide with simple and substituted coumarins in acetic acid by two step process (method-Α) and one pot process (method-B). A comparative study of method-Α and method-B is briefly discussed. The compounds 4g showed maiked activity against S. aureus bacteria and the compounds 4f, 4h showed marked activity against E.Coli bacteria. The other compounds were moderately or weakly active against S. aureus and E. Coli. The compounds 4h, 41 showed marked activity against A. niger and the compounds 41 showed marked activity against C. albicans. The remaining compounds were moderately or weakly active against/!, niger and C. albicans. Description: NITW 2004-01-01T00:00:00Z