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Negative pressure

negative pressure

pressure less than that of the ambient atmosphere.

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Diffusion and Fick's law

... substance A into B, which has units for length^2 and time^-1 and is a negative number to keep the diffusion flux value positive. So Fick's law ... This could also be thought as relating to the difference in pressure of substance A between two arbitrary surfaces in the system during ...

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by Scotsgofree
Sat Oct 25, 2014 3:10 pm
Forum: Cell Biology
Topic: Diffusion and Fick's law
Replies: 1
Views: 1325

Hypothetical experiment

... to create conditions mimicking nature - changing environment where negative or positive pressure is present and mounting. I am afraid that using minimal media predisposes bacteria ...

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by Cat
Fri Dec 09, 2011 3:53 pm
Forum: Evolution
Topic: Hypothetical experiment
Replies: 6
Views: 5657

The Implausible Engines of Evolution

... to miss one important concept here: what makes a mutation positive or negative in the first place? Most mutations are quite useless in their current ... in numbers and the mutant strain loses ground. If the antimicrobial pressure was constant (for example, a life-long antimicrobial treatment of ...

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by biohazard
Mon Oct 10, 2011 7:23 am
Forum: Evolution
Topic: The Implausible Engines of Evolution
Replies: 40
Views: 74345

Theories - Origin of Life

... different cases is a demand, "social order", "selection pressure" and so on. If this law of nature to apply the theory to our ... society" creative intelligence is no longer needed, subject to negative selection pressure and begins to regress. 30-50 thousand years happy ...

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by LeoPol
Mon Sep 05, 2011 8:29 am
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 563
Views: 1128580

Population Genetics Lab (Palladino)

... moth genotype have an equal chance of survival or is there a selective pressure (positive or negative) on one or more genotype? Explain pls. Thank you!!!!

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by overthehead
Sun Jul 17, 2011 8:39 pm
Forum: Genetics
Topic: Population Genetics Lab (Palladino)
Replies: 0
Views: 2121
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