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Infrared Headphones

Infrared headphones use infrared light to carry an information signal from a transmitter to a receiver. Sounds simple enough, but the actual process is very complicated. The human ear gathers sound as compression waves pass through and distort the air. These sympathetic distortions produce resonant vibrations in parts of the ear, which in turn ...

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InfraredHeadphones
Biology

What's The Difference Between A Sweet Potato And A Yam?

What's in a name? Although supermarkets offer both 'yams' and 'sweet potatoes,' in fact they are all sweet potatoes. True yams are rarely seen in the United States, and are actually quite different ... Continue reading

SweetPotatoYam
Biology

Genetic Testing And Discrimination

Genetic testing is the use of recombinant DNA technology to obtain information about a person's genome. The first genetic tests were conducted during the 1960s for the disease phenylketonuria (PKU). ... Continue reading

GeneticTestingAndDiscrimination
Biology

If You're Bringing Cows, Bring Your Own Decomposers

Living organisms create a lot of waste products. Every year they deposit millions of tons of dead plant and animal matter on almost every corner of the earth - and they make dung, lots of dung. Where ... Continue reading

CowsAndDecomposers
Astronomy

The Strange Spin of Uranus

Directional terms like north and south make sense here on Earth. The north and south axis of the Earth is relatively perpendicular to the plane of the Earth's orbit around the sun. Actually, Earth's ... Continue reading

UranusSpin

What Is Acetone?

WhatIsAcetoneAcetone is a manufactured chemical that is also found naturally in the environment. It is a colorless liquid with a distinct smell and taste. It evaporates easily, is flammable, and dissolves in water. It is also called dimethyl ketone, 2-propanone, and beta-ketopropane. Acetone is used to make plastic, fibers, drugs, and other chemicals. It is also used to dissolve other substances.

It occurs naturally in plants, trees, volcanic gases, forest fires, and as a product of the breakdown of body fat. It is present in vehicle exhaust, tobacco smoke, and landfill sites. Industrial processes contribute more acetone to the environment than natural processes.

If you are exposed to acetone, it goes into your blood which then carries it to all the organs in your body. If it is a small amount, the liver breaks it down to chemicals that are not harmful and uses these chemicals to make energy for normal body functions. Breathing moderate- to-high levels of acetone for short periods of time, however, can cause nose, throat, lung, and eye irritation; headaches; light-headedness; confusion; increased pulse rate; effects on blood; nausea; vomiting; unconsciousness and possibly coma; and shortening of the menstrual cycle in women. Swallowing very high levels of acetone can result in unconsciousness and damage to the skin in your mouth. Skin contact can result in irritation and damage to your skin. The smell and respiratory irritation or burning eyes that occur from moderate levels are excellent warning signs that can help you avoid breathing damaging levels of acetone.