Novel elimination method of iron and manganese ions from drinkable groundwater in Assiut, Egypt, by using sodalite-bearing modified illite

2021 ◽  
Author(s):  
Atef Mohamed Gad Mohamed ◽  
Mahmoud Mohamed Ahmed Mohamed ◽  
Abd El Hay Ali Farrag ◽  
Al-Shimaa Roshdy Mohamed Ali
Keyword(s):  
Manganese Ions ◽  
Elimination Method ◽  
Iron And Manganese

scholarly journals Adsorption of Iron and Manganese Ions Using Low-Cost Materials as Adsorbents

2004 ◽  
Vol 22 (1) ◽  
pp. 25-37 ◽  
Author(s):  
Mamdouh M. Nassar ◽  
Kamal T. Ewida ◽  
Ebrahiem E. Ebrahiem ◽  
Yehia H. Magdy ◽  
Mansour H. Mheaedi
Keyword(s):  
Low Cost ◽  
Manganese Ions ◽  
Iron And Manganese

Efficient technology for the removal of iron and manganese ions from artesian water using clinoptilolite

2012 ◽  
Vol 18 (4) ◽  
pp. 1438-1440 ◽  
Author(s):  
Yu.I. Tarasevich ◽  
V.V. Goncharuk ◽  
V.E. Polyakov ◽  
D.A. Krysenko ◽  
Z.G. Ivanova ◽  
...  
Keyword(s):  
Manganese Ions ◽  
Efficient Technology ◽  
Artesian Water ◽  
Iron And Manganese

scholarly journals Differential Regulation of Iron- and Manganese-Specific MtsABC and Heme-Specific HtsABC Transporters by the Metalloregulator MtsR of Group A Streptococcus

2006 ◽  
Vol 74 (9) ◽  
pp. 5132-5139 ◽  
Author(s):  
Tracey S. Hanks ◽  
Mengyao Liu ◽  
Michael J. McClure ◽  
Maki Fukumura ◽  
Angela Duffy ◽  
...  
Keyword(s):  
Mouse Model ◽  
Metal Ions ◽  
Promoter Region ◽  
Group A Streptococcus ◽  
Differential Regulation ◽  
Deletion Mutants ◽  
Human Pathogen ◽  
Manganese Ions ◽  
Group A ◽  
Iron And Manganese

ABSTRACT The genome of the human pathogen group A Streptococcus (GAS) encodes the transporters MtsABC, FtsABCD, and HtsABC to take up ferric and manganese ions, ferric ferrichrome, and heme, respectively. The GAS genome also encodes two metalloregulators PerR and MtsR. To understand the regulation of the expression of these transporters, the mtsR and perR deletion mutants of a GAS serotype M1 strain were generated, and the effects of the deletions and Fe3+, Mn2+, and Zn2+ on the expression of mtsA, htsA, and ftsB were examined. Mn2+ dramatically depresses mtsA transcription and levels of the MtsA protein but does not downregulate the expression of htsA and ftsB. Fe3+ decreases the expression of mtsA and htsA but has no effect on ftsB expression. Zn2+ has no effect on the expression of all three genes. The deletion of mtsR abolishes the Mn2+- and Fe3+-induced depression of mtsA expression and the Fe3+-dependent decrease in htsA expression. The deletion of mtsR does not significantly alter GAS virulence in a mouse model of subcutaneous infection. The deletion of perR does not affect the expression of the genes in response to the metal ions. MtsR binds to the mts promoter region in the presence of Mn2+ or Fe2+. The results indicate that MtsR differentially regulates the expression of mtsABC and htsABC.

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