effect of heavy metals on microbial activity insome ecosystems / Mohamed Nasr Leithy ; Supervised Mohamed Zakaria Sedik , Zahira Said Tawfik
Language: Eng Publication details: Cairo : Mohamed Nasr Leithy , 2006Description: 133p : ill ; 25cmOther title:- تاثير المعادن الثقيلة على النشاط الميكروبى فى بعض الاوساط البيئية [Added title page title]
- Issued also as CD
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قاعة الرسائل الجامعية - الدور الاول | المكتبة المركزبة الجديدة - جامعة القاهرة | Cai01.07.06.Ph.D.2006.Mo.E. (Browse shelf(Opens below)) | Not for loan | 01010110045786000 | ||
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مخـــزن الرســائل الجـــامعية - البدروم | المكتبة المركزبة الجديدة - جامعة القاهرة | Cai01.07.06.Ph.D.2006.Mo.E. (Browse shelf(Opens below)) | 45786.CD | Not for loan | 01020110045786000 |
Thesis (PH.D.) - Cairo University - Faculty Of Agriculture - Department Of Microbiology
The effect of four metal concentrations , as well as , six Gamma - irradiation doses on the activity of cellulase , urease and dehydrogenase was determinedApplication of heavy metals at any rate caused noticeable reduction in their activity depending upon the metal type and concentrationEven at the low concentration , Cr6+followed by Hg2+had the most harmful effect on the enzymatic activities , while Pb2+showed the least toxicitySoil exposure to Gamma - irradiation differently affected the enzymatic activitiesThis varied from stimulating effect on urease to suppressive one on dehydrogenaseGenerally , the high doses of - rays inhibited the activity of the three enzymes and dehydrogenase proved to be the most susceptible enzyme toward radiation
Issued also as CD
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