Comparative evaluation of different methods of extraction and purification used in technical enzyme production from microorganisms
dc.contributor.author | Gidamis, A.B. | |
dc.contributor.author | Nnko, S.A. | |
dc.contributor.author | Shayo, N.B. | |
dc.contributor.author | Chove, B.E. | |
dc.contributor.author | Kroner, H. K. | |
dc.date.accessioned | 2017-12-08T11:27:35Z | |
dc.date.available | 2017-12-08T11:27:35Z | |
dc.date.issued | 1998 | |
dc.description | Tanzania Journal of Agriculture Science 1998, Vol. 1(2), pp 141-148 | en_US |
dc.description.abstract | A stlldy was conducted to compare the efficiency of two methods of microbial cell separation and enzyme purification using penicillin-G-acylase (PGA) from Escherichia coli. The efficiency of two methods of ceJ[ separation; centrifugation and cross flow filtration (CFF) were compared. The CFF method was found to have both higher separation efficiency and enzyme yield than centrifugation method. Centrifugation method gave a separation efficiency of 98.5% with enzyme yield of94 % whereas CFFmethod resulted in 100% separation efficiency and enzyme yield of98.8%. The Escherichia coli cells were disrupted by high pressure homogenization (HPH),and the disrupted cells were purified using two different techniques. Technique I was a combination of cross-flow-diafiltration (CFD) , ultrafiltration (UF) and heat/pH-shift treatments. This technique resulted in 47% enzyme yield with a purification factor of 12. Technique II which involved two extraction steps by' aqueous two - phase system (APS) coupled with UF resulted in 62 % enzyme yield with a pu;ificationfactor of 4. Technique I was therefore much better than techriique Il in purifying the enzyme. For higher enzyme yield, technique II would seem to be a better one than technique I. | en_US |
dc.identifier.uri | https://www.suaire.sua.ac.tz/handle/123456789/1845 | |
dc.language.iso | en | en_US |
dc.subject | Microbial enzymes | en_US |
dc.subject | Purification factor | en_US |
dc.subject | Recovery rate | en_US |
dc.subject | Separation efficiency | en_US |
dc.subject | Technical enzyme | en_US |
dc.title | Comparative evaluation of different methods of extraction and purification used in technical enzyme production from microorganisms | en_US |
dc.type | Article | en_US |