Dictionary » U » Ultraviolet rays

Ultraviolet rays

Ultraviolet rays

That portion of the electromagnetic spectrum immediately below the visible range and extending into the x-ray frequencies. The longer wavelengths (near-uv or biotic or vital rays) are necessary for the endogenous synthesis of vitamin d and are also called antirachitic rays; the shorter, ionizing wavelengths (far-uv or abiotic or extravital rays) are viricidal, bactericidal, mutagenic, and carcinogenic and are used as disinfectants. There are two types of ultraviolet rays; uva and UVB. UVB are extremely harmful.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Re: How to Obtain Dinosaurs

... supposes more intensive engendering of ozone, which conditioned weaker ultraviolet radiation to the Earth’s surface. At the same time, the nitrogen was at smaller exposition of the cosmic rays, which supposes smaller synthesis of the radioactive C14, through which organic ...

See entire post
by Chroma
Tue Jan 05, 2010 9:33 pm
 
Forum: Evolution
Topic: How to Obtain Dinosaurs
Replies: 12
Views: 12004

How to Obtain Dinosaurs

... supposes more intensive engendering of ozone, which conditioned weaker ultraviolet radiation to the Earth’s surface. At the same time, the nitrogen was at smaller exposition of the cosmic rays, which supposes smaller synthesis of the radioactive C14, through which organic ...

See entire post
by enarees
Tue Jan 05, 2010 5:38 pm
 
Forum: Evolution
Topic: How to Obtain Dinosaurs
Replies: 12
Views: 12004

Radiation Pollution

... The word radiation is a general term use to describe a variety of rays to which life on earth maybe exposed. There are lot of kinds of radiations including ultraviolet rays, infrared rays, cosmic rays and rays from radioactive materials. There ...

See entire post
by giniephaj
Tue Oct 20, 2009 4:07 am
 
Forum: Ecology
Topic: Radiation Pollution
Replies: 0
Views: 11387

Skin Cancer/DNA damage/ Cell division Question?

... that some cancers are hereditary. One form of cancer is caused by ultraviolet radiation such as the type produced by the sun. It causes damage ... to reproduce uncontrollably resulting in a tumor or growth. The UV rays you are referring to actually cause the mutations themselves and therefore ...

See entire post
by rosarioduniam89
Sun Jan 11, 2009 11:45 pm
 
Forum: Molecular Biology
Topic: Skin Cancer/DNA damage/ Cell division Question?
Replies: 1
Views: 4553

main features of the current theory of the origin of life

... formed yet... the atmosphere was subjected to bursts of energy from ultraviolet rays, eletrical discharge in the form of lightning, heat from volcanic eruptions, hot springs ...

See entire post
by rajvandam
Sun Sep 14, 2008 11:57 pm
 
Forum: General Discussion
Topic: main features of the current theory of the origin of life
Replies: 0
Views: 1827
View all matching forum results

This page was last modified 00:21, 26 October 2006. This page has been accessed 3,594 times. 
What links here | Related changes | Permanent link