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Related Concept Videos

Microbial Corrosion01:24

Microbial Corrosion

Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...
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Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...
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The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
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The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...
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Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
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The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...

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Fabrication of Antibacterial Graphene Oxide/Copper Nanocomposites
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Metallic copper as an antimicrobial surface.

Gregor Grass1, Christopher Rensing, Marc Solioz

  • 1Dept. of Clinical Pharmacology, University of Bern, Murtenstrasse 35, 3010 Bern, Switzerland.

Applied and Environmental Microbiology
|January 4, 2011
PubMed
Summary
This summary is machine-generated.

Metallic copper surfaces exhibit rapid "contact killing" of bacteria, yeasts, and viruses. This antimicrobial property is being explored for healthcare to prevent infections and understand resistance mechanisms.

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Area of Science:

  • Microbiology
  • Materials Science
  • Public Health

Background:

  • The phenomenon of
  • contact killing
  • of microorganisms on copper surfaces has been known since ancient times.
  • Renewed interest stems from copper's potential as an antibacterial material in healthcare settings.
  • Copper is the first solid antimicrobial material registered by the U.S. Environmental Protection Agency.

Purpose of the Study:

  • To review recent findings on the mechanistic aspects of copper's contact killing.
  • To compare contact killing mechanisms with ionic copper toxicity.
  • To discuss the value of copper as a hygienic material in hospitals.

Main Methods:

  • Review of recent scientific literature on copper's antimicrobial activity.
  • Analysis of mechanistic studies on contact killing.
  • Juxtaposition of contact killing with ionic copper toxicity mechanisms.

Main Results:

  • Contact killing occurs at a rate of at least 7 to 8 logs per hour.
  • No viable microorganisms are typically recovered from copper surfaces after extended incubation.
  • Copper's antimicrobial activity is well-established and supported by clinical evaluations.

Conclusions:

  • Understanding contact killing mechanisms is crucial for addressing potential microbial resistance and optimizing copper's use.
  • Copper shows significant promise as a hygienic material in healthcare environments.
  • Further research can inform material engineering and cleaning protocols for copper-based antimicrobial surfaces.