Production of a heavy metal tolerant mutant from a sensitive strain of Bacillus megaterium KM.
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Production of a heavy metal tolerant mutant from a sensitive strain of Bacillus megaterium KM. by Lloyd Blackband

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Published by University of Wolverhampton in Wolverhampton .
Written in English


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Edition Notes

Dissertation (M.Sc.) - University of Wolverhampton 1995.

ID Numbers
Open LibraryOL19785610M

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Three heavy metal resistant Bacillus spp were isolated from the industrial effluents from Kanpur against Cr, Pb, Hg, Hg, Cd, Zn and Co, where all the isolates exhibited high resistance to heavy Author: M Ch Sekhar Srikakolapu. In the present investigation a strain of Bacillus megaterium BM05 was evaluated for cellulase production in submerged fermentation using wheat straw as a substrate. Considering the effect of metals on the respiratory enzymes, one strain of Ag-tolerantBacillus sp. and one of Hg-tolerant P. aeruginosa were unable to produce oxidase in the presence of Ag and Hg, respectively, while the expression of gelatinase was largely inhibited in various Gram negative strains (66% by Cr). Drug resistance in Hg-tolerant. Bacterial strains that were highly tolerant of several heavy metals also showed resistance to a wide spectrum of antibiotics, and some strains bore plasmids of varying numbers and sizes.

A heavy metal resistant bacterium Bacillus spp. strain CPB4 was isolated from heavy metal contaminated soil in Korea and further characterised.   A heavy metal resistant bacterium Bacillus spp. strain CPB4 was isolated from heavy metal contaminated soil in Korea and further characterised. The CPB4 strain showed a high capacity for uptake of heavy metal Pb (Pb > Cd > Cu > Ni > Co > Mn > Cr > Zn) both in single and in mixed heavy metal Cited by: Primary screening of heavy metal resistant bacteria. For the selective screening of heavy metal resistant bacteria, μg/mL of heavy metal (Lead) incorporated LB (Luria Bertani) agar plates (Peptone g/L, yeast extract, g/L, NaCl g/L, dextrose anhydrate g/L and agar g/L: pH −) were used and screened by standard pour plate method observed at 37 ° by: An Ni tolerant Bacillus subtilis produced substantial amount of IAA during stationary phase of growth in the medium and showed time-dependent increase in IAA production. Enhanced production of IAA (55 μg mL − 1) was noticed in the presence of tryptophan ( μg mL − 1).Cited by:

Abstract: Under the heavy metal polluted circumstances, microorganisms certainly have some changes in terms of species, quantity, community structure and diversity to adapt the environments. Now, many heavy metal tolerant microbe groups have been studied. In the study, a heavy metal tolerant and psychrophilic bacterium strain from Antarctica was screened. 1. Introduction. Heavy metals released into the environment by technological activities pose a significant threat to the natural ecosystems and public health due to their toxicity and persistence in the food chain,.Conventional processes for heavy metal removal often are neither effective nor economical, especially for diluted solutions,,,.The utilization of biosorption for the treatment Cited by:   Bacillus megaterium strain MNSHK-1, isolated from a high-metal content site in Guanajuato, Mexico, has the intrinsic capacity to remove vanadium (V) and nickel (Ni) from a petrochemical spent catalyst, and counteract the toxic effects produced in the cell due to the presence of oxidative stress. Since knowledge of the molecular components involved in the microbial resistance to Cited by: 4. Keywords: Heavy metals, Metal resistance genes, bacteria. _____ INTRODUCTION Microbes may play a large role in the biogeochemical cycling of toxic heavy metals also in cleaning up metal-contaminated. Heavy metals are often defined as a group of metals whose atomic density is greater than 5g cm-3 [1].