| Journal: | Brazilian archives of biology and technology |
| Database: | PERIÓDICA |
| System number: | 000391508 |
| ISSN: | 1516-8913 |
| Authors: | Ghalib, Aslam Khan1 Yasin, Muhammad1 Faisal, Muhammad1 |
| Institutions: | 1University of the Punjab, Department of Microbiology and Molecular Genetics, Lahore, Punjab. Pakistán |
| Year: | 2014 |
| Season: | Jul-Ago |
| Volumen: | 57 |
| Number: | 4 |
| Pages: | 554-560 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | Two thermophilic Bacillus cereus strains (B. cereus-TA2 and B. cereus-TA4) used in the present study were isolated from the geothermal spring of Hunza valley, Gilgit, Pakistan. They showed the ability to withstand and grow at high temperature (85°C). Both these strains could resist multiple metals (copper, cadmium, mercury, manganese, zinc, arsenic, chromium and selenium). Strain B. cereus-TA4 reduced Cr (VI) at pH 5.0 to 9.0 but maximum reduction (83%) was observed at pH 7.0 after 48 h when initially supplied with 200 µg mL-1 of K2CrO4. Lower initial concentrations such as 100 µg mL-1 supported higher reduction (90 to 95%) than that of high concentration such as 500 µg mL-1 (20 to 30%). Both the strains reduced nearly 70% of Se (IV) after 48 h of growth at pH 7.0 when initially supplied with 200 µg mL-1 of Na2SeO3. The optimum temperature for maximum Se (IV) reduction was 45°C for both the strains |
| Disciplines: | Biología |
| Keyword: | Bacterias, Microbiología, Remoción de metales, Bacterias termofílicas, Bacillus cereus, Cromo, Selenio |
| Keyword: | Biology, Bacteria, Microbiology, Metal removal, Thermophilic bacteria, Bacillus cereus, Chromium, Selenium |
| Full text: | Texto completo (Ver HTML) |
