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Well counter

well counter

A scintillation crystal shaped with a central hole to receive a small sample, plus associated detector and electronics.


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How Does Natural Selection Create Ordered Variation?

as Cat wrote, the counter-conditions, even if they were opposite (highly unlikely), will only very rarely lead to removal of exactly the trait which was beneficial before. Rather, some counter-balancing new trait will evolve. And thus ...

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by JackBean
Wed Jan 22, 2014 9:12 am
 
Forum: Evolution
Topic: How Does Natural Selection Create Ordered Variation?
Replies: 7
Views: 3544

Human Collembola Infestations

... things on me but couldn't see these bugs. I tried everything. To my amazement I came back from the allergist and he put me on zyrtec over the counter allergy medicine once at night and one in the morning 10mg. It took a month but I finally don't feel a thing. He explained that I had a bad ...

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by sunshine123
Mon Jan 13, 2014 6:50 pm
 
Forum: Human Biology
Topic: Human Collembola Infestations
Replies: 40
Views: 106770

Home Work Question

Sue has heard that taking an over-the-counter ‘energy’ pill, which contains as much caffeine as a strong cup of coffee, makes people feel alert and ‘speedy’. She wonders if taking this pill will make a difference to the reaction times of people ...

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by zak
Tue Dec 10, 2013 12:08 pm
 
Forum: General Discussion
Topic: Home Work Question
Replies: 12
Views: 4460

Why must we avert the genome of Eden?

... simple universal ancestor, but to a very complex one. This is a well known phenomenon termed: “The Genome of Eden” by Prof. W. Ford Doolittle.1 ... possible explanations? Why must we avert it? If there is no knock down counter evidence of some sort, that prohibits the existence of the GOE or ...

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by Hunor
Mon Sep 23, 2013 12:08 am
 
Forum: Evolution
Topic: Why must we avert the genome of Eden?
Replies: 6
Views: 7641

which mechanism triggers the first cell differentiation?

... a hollow sphere of cells, called a blastocyst but do not explain why they begin to specialize. I could imagine ⋅ that a cell has a "counter" on the number of divisions which triggers differentiation after a given amount of divisions ⋅ or a chemical substance (either ...

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by WoJ
Mon Jul 22, 2013 6:18 pm
 
Forum: Cell Biology
Topic: which mechanism triggers the first cell differentiation?
Replies: 4
Views: 2763
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