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Half Life

The time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate). The time span involved for a radioactive substances radioactivity to half.


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Re: Bird-Dinosaur News

... in them also, which should not be there, because C-14 has a very short half-life of 5270 years. Helium in "Ancient Rocks" Helium is a by-product of uranium decay. ...

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by AFJ
Wed Jul 08, 2009 2:51 am
 
Forum: Evolution
Topic: Bird-Dinosaur News
Replies: 44
Views: 1044

What does peroxynitrite do in cytotoxicity of cells?

... in cells exposed to peroxynitrite. Also, peroxynitrite has a very short half-life so it would be very much impossible for it to penetrate the cell membrane and exhibit ...

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by azureblue15
Fri Jun 05, 2009 5:57 am
 
Forum: Molecular Biology
Topic: What does peroxynitrite do in cytotoxicity of cells?
Replies: 0
Views: 135

Re: Any SOLID arguments against evolution?

... on any random structure from this imbalance alone would cancel at least half of the possibilities. By polar bonds you are I believe referring to ... to the greenhouse gases. No condensation, no water and lots of heat--no life unless you say archaens (extremeophiles) were first--but bacteria fossils ...

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by AFJ
Mon Jun 01, 2009 1:23 am
 
Forum: Evolution
Topic: Any SOLID arguments against evolution?
Replies: 106
Views: 16661

Re: Any SOLID arguments against evolution?

... into an 'overwhelm the opposition with hundreds of little pieces of half relevant information" type discussions. Maybe i should have asked ... up as a catholic, i have only been to catholic schools for my whole life, i have made up my own mind based on simple logic. The human race is ...

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by futurezoologist
Sun May 24, 2009 11:58 am
 
Forum: Evolution
Topic: Any SOLID arguments against evolution?
Replies: 106
Views: 16661

Re:

... of evil exists to make good even stronger. For example, would a life as inspiring as Martin Luther King, Ghandi, or Mother Theresa have been ... as long as I keep bumping into god and religious dogmas as arguments in half of the scientific debates, and especially when it is not just an ethical ...

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by biohazard
Tue May 05, 2009 6:52 am
 
Forum: Evolution
Topic: Natural selection is proven wrong
Replies: 177
Views: 16282
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