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L-asparaginase production by mangrove derived Bacillus cereus MAB5:optimization by response surface methodology

Asian Pacific Journal of Tropical Medicine 2011年第6期4卷 486-491页

作者： thenmozhi c Sankar R Karuppiah V Sampathkumar P centre of Advanced Study in Marine Biology Faculty of Marine Sciences Annamalai University Parangipettai-608 502Tamil NaduIndia

Objective:To isolate marine bacteria,statistically optimize them for maximum asparaginase ***:In the present study,statistically based experimental designs were applied to maximize the production of L-asparaginase from bacterial strain of Bacillus cereus（***） MAB5（HQ675025） isolated and identified by 16S rDNA sequencing from mangroves rhizosphere ***:Plackett-Barman design was used to identify the interactive effect of the eight variables *** extract,soyabean meal,glucose,magnesium sulphate,KH2PO4,wood chips,aspargine and sodium *** the variables are denoted as numerical factors and investigated at two widely spaced intervals designated as -1（low level） and +1（high level）. The effect of individual parameters on L-asparaginase production was *** meal,aspargine,wood chips and sodium chloride were found to be the significant among eight *** maximum amount of L-asparaginase produced（51.54 IU/mL） from the optimized medium containing soyabean meal（6.282 8 g/L）,aspargine（5.5 g/L）,wood chips（1.383 8 g/L） and Nacl（4.535 4 g/L）.conclusions:The study revealed that,it is useful to produce the maximum amount of L-asparaginase from *** MAB5 for the treatment of various infections and diseases.

关键词： L-asparaginase Bacillus cereus Mangroves Plackett-Barman design central composite design

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Transient Thermal Management comparison of a Microprocessor Using PcMs in Various configurations

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Journal of Thermal Science 2011年第6期20卷 516-520页

作者： thenmozhi R Sharmeela c Natarajan P Velraj R Ganthipathy Tulsis' Engineering college AUIndia Anna University ChennaiIndia Bharathidasan Engineering college AUIndia

There has been a strong interest in the use of Phase change Materials (PcMs) for the transient thermal abatement of high powered *** paper presents a set of transient computational analysis for selected Ic packages with the purpose of calibrating the merits of PcM in different *** transient analysis of high powered microprocessors with heat sinks was performed as a benchmark for comparison with the same microprocessors fitted with PcM in the following configurations:a) PcM imbedded into the finned region of the heat sink,b) PcM mounted between the microprocessor and heat sink,c) sealed PcM underfill to the microprocessor and d) PcM fitted to the underside of the printed circuit board directly beneath the *** analysis was performed using a commercial cFD tool together with an approximation to the phase change mechanism using the slope *** indicate the merit of each configuration.

关键词： Phase change Materials cFD Thermal Management Transient Latent heat

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