NOPR Collection:

Isolation, Screening and Optimization of Xylanase Production in Submerged Fermentation Using P.citrinum.

Wed, 01 Jul 2015 00:00:00 GMT

Title: Isolation, Screening and Optimization of Xylanase Production in Submerged Fermentation Using P.citrinum. Authors: Ghoshal, G; Banerjee, U C; Shivhare, U S Abstract: Cellulase free xylanase is one of the most important upcoming enzyme having industrial application in chemical, biochemical, pharmaceutical and food industry. In the present study, a soil isolate was found to be promising for xylanase production. Biochemical identification tests, Scanning Electron Microscopy (SEM) and 16S rRNA sequencing identified the organism Penicillium citrinum MTCC 9620. Later on, optimization of media composition and environmental factors were investigated. Temperature, pH, agitation speed, carbon sources, nitrogen sources, inoculum concentration, and additives were optimized on the basis of xylanase yield, dry cell weight, extracellular protein content, sugar consumption etc. Optimized media produced 138.73 U/mL xylanase at 120 h (30°C). The purified xylanase was found to have molecular weight approximately 29 KDa. Page(s): 400-405

A Novel Approach to Solve Unit Commitment and Economic Load Dispatch Problem using IDE-OBL

Wed, 01 Jul 2015 00:00:00 GMT

Title: A Novel Approach to Solve Unit Commitment and Economic Load Dispatch Problem using IDE-OBL Authors: Surekha, P; Sumathi, S Abstract: The non-convex and combinatorial nature of the UC-ELD problems requires the application of heuristic algorithms to generate optimal schedules. In studies reported so far, the Unit Commitment and the Economic Load Dispatch problems are solved as separate problems. In the addressed work, the commitment and de-commitment of generating units is obtained using a Genetic Algorithm (GA), and the optimal load distribution of the scheduled units is obtained using Improved Differential Evolution with Opposition Based Learning (IDE-OBL). The power demand is varied for 24 hours to determine the schedule in the IEEE 30 bus system including transmission losses, power balance and generator capacity constraints. Optimal distribution of load among generating units, fuel cost per hour, power loss, total power and computational time are computed for each of the test systems using the intelligent algorithms. From the comparative analysis, it can be concluded that GA-IDE-OBL is a better approach for solving UC-ELD problems in terms of optimal solution, robustness, and computational efficiency. Page(s): 395-399

Experimental comparison on efficiency of alkaline hydrolysis reaction in circular microreactors over conventional batch reactor

Wed, 01 Jul 2015 00:00:00 GMT

Title: Experimental comparison on efficiency of alkaline hydrolysis reaction in circular microreactors over conventional batch reactor Authors: Antony, R; Nandagopal, M S G; Manikrishna, C; Selvaraju, N Abstract: Alkaline hydrolysis, a nucleophilic substitution reaction was performed in microchannel tubes and the reaction efficiency was investigated and compared with conventional batch method. Reaction between n-butyl acetate and sodium hydroxide, a fast alkaline hydrolysis was employed as a specimen. The reactions were performed in a simple circular T-Junction microreactor. The riveting natures of T-Junction channels are they could facilitate the formation of rich variety of slug flow patterns. The diameters of the microchannels were scaled down from 1200 µm to 400 µm over a range of 1200 µm, 1000 µm, 800 µm, 600 µm and 400 µm. We- observed a steady increase in reaction efficiency down the diameter scale for a non-varying reactant concentration. In addition to varying diameter, parameters like flow rate of reactants, length of the microchannels were also varied for better understanding about the complexion of alkaline hydrolysis reaction in a microscale platform. The experimental observations reveal that microchannels with minimum diameter are dominant in reaction efficiency over larger diameter channels and highly supreme over conventional batch reactor. Page(s): 390-394

Optimization of Test Case Design in Rational Quality Manager – A Software Testing Tool

Wed, 01 Jul 2015 00:00:00 GMT

Title: Optimization of Test Case Design in Rational Quality Manager – A Software Testing Tool Authors: Kumar, A N; Geetha, B G Abstract: Software systems are playing important role in society and becoming more challenging to build. New methods, techniques and tools are available to support development and maintenance. Because software has such an important role in our lives both economically and socially. So there is a pressure for software professionals to focus on quality issues. Software testing is used to ensure the quality of the product. Even though, the Test Life Cycle consists of several steps, test case design plays a vital role. There are two types of testing namely manual testing and automated testing. The process of testing with the help of human is known as manual testing. The process of testing software by another testing tool is known as automated testing. There are lot of automated tools are available to test the software. In this research, the CD project is taken as example and explained briefly about how to work with the test cases in Rational Quality Manager which is the product of IBM. Page(s): 387-389