Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"heavy metal resistance"”.
-
Heavy Metal Resistance in the Genus Gluconobacter
… resistant to cadmium, and realizing that cadmium resistance among gram-negative organisms is often encoded by an operon which also encodes cobalt and zinc resistance via an efflux mechanism, 10 strains of Gluconobacter were tested for heavy-metal resistance. Three of the 10 representative strains …
-
Engineering heavy metal resistance in cyanobacteria Synechococcus elongatus PCC7942
… various environmental pressures, including heavy metal toxicity which can be significant. One of the possible mechanisms of heavy metal detoxification is chelation of the metal ions by endogenous polyphosphate. This study is an evaluation of nanoparticle toxicity that contains heavy metal …
-
GENOMIC AND PHYSIOLOGICAL INSIGHTS INTO BACTERIAL HEAVY METAL RESISTANCE MECHANISMS FOR ENVIRONMENTAL DECONTAMINATION
The contamination of soils and waters with heavy metals (HM) such as chromium, copper, zinc and cadmium represents one of the most severe environmental challenges, posing risks to ecosystem balance and human health. Microorganisms and plants have evolved a range of mechanisms to tolerate, transform …
-
Identification and characterisation of bacterial genes associated with resistance to and/or degradation of environmental pollutants
… were found to be resistant to varying levels of heavy metals and polymerase chain reactions suggesting the presence of mercury (mer), copper (pco) and cadmium, zinc and cobalt (czc) resistance genes. S. maltophilia VUN 10010, was previously investigated for its ability to degrade pyrene and other …
-
Specificity and benefits of an exclusion mechanism for a mobile genetic element in Bacillus subtilis
… the spread of genes involved in antibiotic and heavy metal resistance, metabolism, symbiosis, and pathogenicity. Like conjugative plasmids, ICEs spread to new hosts by conjugative transfer through Type 4 Secretion Systems (T4SSs) encoded in the ICE DNA, however unlike plasmids, ICEs are usually …
-
Determination of mechanism of zinc resistance in Chironomus riparius: a physiological/energetic approach
… that are commonly thought to be responsible for heavy metal resistance in aquatic invertebrates. Data were generated based on comparisons of growth and respiration experiments using instar III and IV Chironomus riparius under the influence of 0.0, 62.5, 125, 250, and 500 ppb zinc. Main …
-
Genomic profiling of the neonatal meningitic Cronobacter sakazakll clonal complex 4
… low invasive isolate indicated the presence of heavy metal resistance associated traits. The metal resistance assays could not differentiate the high and low invasive CC4 isolates. The case study of the 1994 French outbreak using genome sequenced data suggested powdered infant formula (PIF) to …
-
Genomic insights into the host range and interspecies transmission dynamics of Staphylococcus aureus
… a Tn916 transposon carrying a tetracycline resistance gene, which has now been stably maintained for 57 years. This was followed by the acquisition of a SCCmec type V that carries methicillin, tetracycline, and heavy-metal resistance genes, which some lineages have maintained for 35 years. …
-
The Diversity and Function of Bacteria Enriched from Gold Particles: Understanding Bacterial Contribution to Biogeochemical Cycling of Gold
… harbour various types of genes (heavy-metal resistance, general-stress tolerance, and metabolic genes), and employ multiple mechanisms to mediate the toxicity of soluble Au. Therefore, Autolerant bacteria can survive gold biogeochemical cycling as well as catalyse particle …
-
Characterisation of surfactant-expressing bacteria and their potential bioremediation properties from hydrocarbon-contaminated and uncontaminated soils
… tests, as well as their tolerance to various heavy metal concentrations and temperature ranges. Their bioremediation capabilities were determined by their ability utilise diesel as a carbon source, as well as their lipase production potentials. The pH, temperature, and salt tolerance of eight …
-
Phenotypic diversity of indigenous rhizobia nodulating different morphotypes of Vachellia karroo
… to temperature, pH, salinity, antibiotic resistance and heavy metal resistance. However, the isolates’ response to carbon source utilization was almost the same as they all utilized more than three quarters of the tested carbon sources. When grown under a temperature range of 5 to 450C, …