Surface Hydrophobicity of an Acidophilic Heterotrophic Bacterium of Mine Origin under Metal Stress

2007 ◽  
Vol 20-21 ◽  
pp. 362-365
Author(s):  
K. Pakshirajan
Keyword(s):  
Heterotrophic Bacterium ◽  
Surface Hydrophobicity ◽  
Metal Resistance ◽  
Zinc Cadmium ◽  
Negative Effect ◽  
Copper Zinc ◽  
The Media ◽  
Culture Growth ◽  
Effect Of Copper ◽  
Special Relevance

Cell surface hydropobicity plays a significant role in microbe-mineral interactions with special relevance of bioleaching. The present investigation envisages a study on the hydrophobic character of Acidiphilium symbioticum KM2, an acidophilic strain of bioleaching environment, when grown in presence of heavy metals - copper, zinc, cadmium and nickel. The metals, at its sub inhibitory concentrations (MIC50), exhibited profound negative effect on the growth of the bacterium. Inhibition on the culture growth rate was highest due to cadmium followed by zinc, nickel and copper. However, upon successive adaptation in different concentrations of each metal in ascending order, the cells could grow rapidly in the presence of higher concentrations of the metals indicating good metal resistance by the bacterium. Compared to normally grown cells, A. symbioticum KM2, when grown in presence of the metals, became more hydrophobic, which was dependent on the metal and its concentration in the media. Among the four metals studied, the effect of copper was found to be the highest, where up to 74 % increase in the bacterial cell hydrophobicity was observed.

scholarly journals Effect of Copper, Zinc, Cadmium and Chromium in the Growth of Crambe

2014 ◽  
Vol 05 (11) ◽  
pp. 975-983
Author(s):  
Gilvanise Alves Tito ◽  
Lúcia Helena Garófalo Chaves ◽  
Josely Dantas Fernandes ◽  
Danilo Rodrigues Monteiro ◽  
Ana Carolina Feitosa de Vasconcelos
Keyword(s):  
Zinc Cadmium ◽  
Copper Zinc ◽  
Effect Of Copper

scholarly journals PLANTS AND MAXIMUM PERMISSIBLE CONCENTRATIONS OF HEAVY METALS IN SOIL

2021 ◽  
Vol 1 (25) ◽  
Author(s):  
Evgeny Aleksandrovich Gladkov ◽  
Olga Victorovna Gladkova
Keyword(s):  
Heavy Metals ◽  
Maximum Permissible Concentration ◽  
High Sensitivity ◽  
Agrostis Stolonifera ◽  
Maximum Permissible Concentrations ◽  
Low Degree ◽  
Zinc Cadmium ◽  
Copper Zinc ◽  
Effect Of Copper ◽  
Cadmium And Lead

The tentative permissible concentrations and the maximum permissible concentration of heavy metals do not always give a complete adequate assessment of the effect on plants. Plant growth inhibition can be at concentrations below the maximum permissible concentrations and tentative permissible concentrations. We studied the effect of copper, zinc, cadmium, and lead concentrations on plants. The object of the research is the lawn grass, the Agrostis stolonifera used in urban greening. According to the data obtained, Agrostis stolonifera showed a low degree of resistance to copper, lower than the tentative permissible concentration and the maximum permissible concentration. Consequently, the tentative permissible concentration and the maximum permissible concentration do not fully reflect the real phytotoxicity of copper. Plants of Agrostis stolonifera demonstrated a relatively high sensitivity to zinc in comparison with the maximum permissible concentration and the tentative permissible concentration. The content of cadmium and lead corresponding to the tentative permissible concentrations did not have a significant effect on the plants.

scholarly journals Natural Hot Spots for Gain of Multiple Resistances: Arsenic and Antibiotic Resistances in Heterotrophic, Aerobic Bacteria from Marine Hydrothermal Vent Fields

2015 ◽  
Vol 81 (7) ◽  
pp. 2534-2543 ◽  
Author(s):  
Pedro Farias ◽  
Christophe Espírito Santo ◽  
Rita Branco ◽  
Romeu Francisco ◽  
Susana Santos ◽  
...  
Keyword(s):  
North Atlantic ◽  
Mobile Element ◽  
Heavy Metal Resistance ◽  
Metal Resistance ◽  
Antibiotic Resistant ◽  
Zinc Cadmium ◽  
Mid Atlantic Ridge ◽  
Copper Zinc ◽  
Total Dna ◽  
Resistant Strains

ABSTRACTMicroorganisms are responsible for multiple antibiotic resistances that have been associated with resistance/tolerance to heavy metals, with consequences to public health. Many genes conferring these resistances are located on mobile genetic elements, easily exchanged among phylogenetically distant bacteria. The objective of the present work was to isolate arsenic-, antimonite-, and antibiotic-resistant strains and to determine the existence of plasmids harboring antibiotic/arsenic/antimonite resistance traits in phenotypically resistant strains, in a nonanthropogenically impacted environment. The hydrothermal Lucky Strike field in the Azores archipelago (North Atlantic, between 11°N and 38°N), at the Mid-Atlantic Ridge, protected under the OSPAR Convention, was sampled as a metal-rich pristine environment. A total of 35 strains from 8 different species were isolated in the presence of arsenate, arsenite, and antimonite. ACR3 andarsBgenes were amplified from the sediment's total DNA, and 4 isolates also carried ACR3 genes. Phenotypic multiple resistances were found in all strains, and 7 strains had recoverable plasmids. Purified plasmids were sequenced by Illumina and assembled by EDENA V3, and contig annotation was performed using the “Rapid Annotation using the Subsystems Technology” server. Determinants of resistance to copper, zinc, cadmium, cobalt, and chromium as well as to the antibiotics β-lactams and fluoroquinolones were found in the 3 sequenced plasmids. Genes coding for heavy metal resistance and antibiotic resistance in the same mobile element were found, suggesting the possibility of horizontal gene transfer and distribution of theses resistances in the bacterial population.

scholarly journals Plasmid DNA analysis of pristine groundwater microbial communities reveal extensive presence of metal resistance genes

2017 ◽  
Author(s):  
Ankita Kothari ◽  
Yu-Wei Wu ◽  
Marimikel Charrier ◽  
Lara Rajeev ◽  
Andrea M. Rocha ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Plasmid Dna ◽  
Dna Analysis ◽  
Field Research ◽  
Metal Resistance ◽  
Mercury Resistance ◽  
16S Rrna Sequence ◽  
Oak Ridge ◽  
Zinc Cadmium ◽  
Copper Zinc

AbstractNative plasmids constitute a major category of extrachromosomal DNA elements responsible for harboring and transferring genes important in survival and fitness. A focused evaluation of plasmidomes can reveal unique adaptations required by microbial communities. We examined the plasmid DNA from two pristine wells at the Oak Ridge Field Research Center. Using a cultivation-free method that targets plasmid DNA, a total of 42,440 and 32,232 (including 67 and 548 complete circular units) scaffolds > 2 kb were obtained from the two wells. The taxonomic distribution of bacteria in the two wells showed greater similarity based on their plasmidome sequence, relative to 16S rRNA sequence comparison. This similarity is also evident in the plasmid encoded functional genes. Among functionally annotated genes, candidates providing resistance to copper, zinc, cadmium, arsenic, and mercury were particularly abundant and common to the plasmidome of both wells. The primary function encoded by the most abundant circularized plasmid, common to both wells, was mercury resistance, even though the current ground water does not contain detectable levels of mercury. This study reveals that the plasmidome can have a unique ecological role in maintaining the latent capacity of a microbiome enabling rapid adaptation to environmental stresses.

Effect of Copper-Zinc Superoxide Dismutase on Endothelium-Dependent Vasodilation in Patients With Essential Hypertension

Hypertension ◽  
1995 ◽  
Vol 26 (6) ◽  
pp. 863-868 ◽  
Author(s):  
Carlos E. García ◽  
Crescence M. Kilcoyne ◽  
Carmine Cardillo ◽  
Richard O. Cannon ◽  
Arshed A. Quyyumi ◽  
...  
Keyword(s):  
Superoxide Dismutase ◽  
Essential Hypertension ◽  
Copper Zinc Superoxide Dismutase ◽  
Zinc Superoxide Dismutase ◽  
Copper Zinc ◽  
Effect Of Copper

Bioremediation of Acid Mine Drainage in an Uranium Deposit

2007 ◽  
Vol 20-21 ◽  
pp. 248-257 ◽  
Author(s):  
Stoyan N. Groudev ◽  
Plamen S. Georgiev ◽  
Irena Spasova ◽  
Marina Nicolova
Keyword(s):  
Mine Drainage ◽  
Plant Biomass ◽  
Uranium Deposit ◽  
Water Flow Rate ◽  
Ambient Temperatures ◽  
Zinc Cadmium ◽  
Copper Zinc ◽  
Cadmium Lead ◽  
Dead Plant ◽  
The Individual

Acid drainage waters generated in the uranium deposit Curilo, Bulgaria, were treated by means of different passive systems such as natural and constructed wetlands, alkalizing limestone drains, permeable reactive multibarriers and a rock filter, used separately or in different combinations. The waters had a pH in the range of about 2 – 4 and contained radionuclides (uranium, radium), heavy metals (copper, zinc, cadmium, lead, nickel, cobalt, iron, manganese), arsenic and sulphates in concentrations usually much higher than the relevant permissible levels for waters intended for use in agriculture and/or industry. The water flow rate through the individual systems was different and not stable, and varied in the range approximately from 0.02 to 1.5 l/s. Efficient removal of pollutants was achieved by means of these systems during the different climatic seasons, even during the cold winter months at water and ambient temperatures close to 0 oC. The removal was due to different mechanisms but microbial sulphate reduction, biosorption by living and dead plant biomass and chemical neutralization played the main roles.

scholarly journals Effect of Copper, Zinc and Boron on Green Leaf Retention and Grain Yield of Winter and Spring Cereals

2015 ◽  
Vol 5 (6) ◽  
Author(s):  
Syed Shah ◽  
Sarah Hookway ◽  
Andrew Richards ◽  
Carl Flint ◽  
Sarah Wilkinson ◽  
...  
Keyword(s):  
Grain Yield ◽  
Green Leaf ◽  
Spring Cereals ◽  
Copper Zinc ◽  
Leaf Retention ◽  
Effect Of Copper

scholarly journals Environmental Impacts of an Old Mine Tailings Deposit – Metal Concentrations and Water Pathways

1987 ◽  
Vol 18 (4-5) ◽  
pp. 301-312 ◽  
Author(s):  
P. Sandén ◽  
S. Karlsson ◽  
U. Lohm
Keyword(s):  
Environmental Impacts ◽  
Mine Tailings ◽  
Water Bodies ◽  
Contaminated Water ◽  
Surrounding Area ◽  
Metal Concentrations ◽  
Principal Source ◽  
Zinc Cadmium ◽  
Copper Zinc ◽  
Cadmium And Lead

Variations in metal concentrations in a heavily polluted stream receiving acidic leachates from an old mine tailings deposit are analysed from a hydrological perspective. From an extensive data material, collected during three years, the variations in concentrations of four metals (copper, zinc, cadmium and lead) are discussed. The deposit is the principal source for these metals in the watershed. The variation in metal concentrations in the vicinity of the deposit can to a large extent be explained by simple dilution of contaminated water with uncontaminated water from the surrounding area. Further downstream the deposit, other processes become increasingly important for the metal concentrations in the water bodies.

Intakes of copper, zinc, cadmium, tin, iron, nickel and arsenic in a population exposed to lead from water

1983 ◽  
Vol 30 ◽  
pp. 255-260 ◽  
Author(s):  
J.C. Sherlock ◽  
G.A. Smart ◽  
J.I. Read ◽  
P.J. Brooke ◽  
G. Forbes ◽  
...  
Keyword(s):  
Zinc Cadmium ◽  
Iron Nickel ◽  
Copper Zinc
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