Trivia

Hard

The Oligodynamic Effect Is A Phenomenon That Describes?

Biocidal Metals
Noodle Elasticity
Knee Hyperextension
Symphonic Harmonization

Answer: Biocidal Metals

If you’re the sort of person that puts even a little thought into the countless germ covered surfaces you come into contact with every day, we’ve got a bit of good news to put a dent in your apprehension over touching things in public.

Metal handles, door knobs, and other surfaces you interact with are naturally self cleaning, from a bacterial standpoint, thanks to a phenomenon known as the oligodynamic effect (from the Greek roots “oligos” or “few” and “dynamis” or “force”). While the mechanism of action is being continually researched and the theories regarding the biocidal properties of metal are being refined over time, the most prominent theories are that metals interact with protein groups (rendering them, by modification on a chemical level, unable to function), that various interactions between metals (especially heavy metals) and cell walls degrade the walls and destabilize bacteria, and that absorption of metals into the body of a cell disrupts key chemical reactions.

Practically speaking, what does this mean in the real world? It means that metal doorknobs, especially those made of copper or copper alloys like brass, destroy bacteria that ends up on them. E. Coli, for example, produces potent toxins and is a serious public health threat. On copper and copper alloy doorknobs (such as brass door knobs and handles) though, over 99.9 percent of E. coli microbes are killed after just 1-2 hours.

Not only does this mean the handles in old buildings are self-cleaning, but it also has implications in the design of hospitals and other germ-sensitive areas. Of the many metals that exhibit a strong oligodynamic effect, ironically, the metal most commonly found in the healthcare industry, stainless steel, does not (on which E. coli takes weeks, not hours, to die off). With this in mind, there is a push towards using metals with biocidal properties in hospital design for the protection of patients and staff alike.

Trivia

Hard

The “Ten-Gallon” Cowboy Hat Derives Its Name From?

Trivia

Very Hard

What Was The World’s First Code-Breaking Computer?

Trivia

Easy

For Their April Fool’s Day Prank In 1965, The BBC Claimed They Could Wirelessly Transmit What?

Trivia

Hard

The Longest Running Restaurant Guide Was Originally Established To Promote?

Trivia

Hard

The First Book Sold By Amazon.com Was A Tome About?

Trivia

Hard

The Largest National Park In The World Is Located In Which Country?

Trivia

Easy

Residential Communities Where People Live With Their Planes And Direct Runway Access Are Called?

Trivia

Easy

The Spicy Heat Of Chili Peppers Is Measured Using The?

Trivia

Very Hard

Which Of The Following Medical Conditions Makes You More Attractive To Mosquitoes?

Trivia

Easy

The Fattiest Organ Of The Human Body Is The?