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Filter sterilisation

a lab technique to sterilise a solution by passing it through a filter fine enough to catch bacteria-sized microorganisms.

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How Does Natural Selection Create Ordered Variation?

... natural selection can only let through a certain amount of mutation. Creationists have it backward. So basically natural selection is a filter. It filters the random mutations, selecting only the best for the particular environment. Simple right? Now here's my problem: A. A static filter based ...

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by Doom
Wed Jan 15, 2014 6:18 am
Forum: Evolution
Topic: How Does Natural Selection Create Ordered Variation?
Replies: 7
Views: 5851

Re: Device for ratiometric fluorescence measurement

... flexibility of scanning the spectrum or rapidly changing ex/em bands, you would build a 2-band fluorescence colorimeter. You'd need two emission filters and one or two excitation filters, arranged around your cuvette so that the excitation and emission light paths intersect at a 90 degree angle ...

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by jonmoulton
Mon Mar 04, 2013 4:58 pm
Forum: General Discussion
Topic: Device for ratiometric fluorescence measurement
Replies: 1
Views: 1808

Re: Theories - Origin of Life

... the food into small pieces that can be absorbed by the blood stream. Most of these small particles travel from the intestines to the liver, which filters and converts the food into nourishment that the blood stream delivers to the cell. How these nutrients pass into the cell of course is another ...

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by scottie
Thu Sep 13, 2012 11:43 am
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 563
Views: 1127971

RT PCR contamination.

... bacteria, or do you work with something rare like endemic mice of Madagascar? Did you consider contamination of your pipets? Do you use tips with filters?

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by triton
Thu Sep 13, 2012 11:05 am
Forum: Molecular Biology
Topic: RT PCR contamination.
Replies: 2
Views: 4922


... (like an aptly named 'electrolytic battery'). Fourth: It's this one . It has what appears to be a 12 volt DC fan on the inside, two removable filters at the back, what I suspect to be a transformer at the base, and some sort of grey, intertwined string at the front (which I believe is wired ...

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by JoshuaFlynn
Fri May 25, 2012 10:34 pm
Forum: Human Biology
Topic: Electromagnetic fields generated by the human body
Replies: 40
Views: 194243
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