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Densities

Density

1. (Science: radiology) The amount of darkness or light in an area of a scan reflects the compactness and density of tissue. Differences in tissue density are the basis for CT and MR scans.

2. (Science: microscopy) logarithm to the base 10 of the reciprocal of transmittance.


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Oxygen consumption

... "Mammalian cells consume oxygen at rate of 0.05-0.5micromol/10^6 cells/hour. Cell cultures for tissue engineering have relatively large cell densities (10^6 cells/mL) which results in total oxygen depletion in 0.4-4 hours." Could anyone explain to me how they calculated the time required ...

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by Mila
Fri Oct 11, 2013 12:19 pm
 
Forum: Cell Biology
Topic: Oxygen consumption
Replies: 2
Views: 857

Re: Theories - Origin of Life

... organises the genome , and another thing, remember also that each genome organisation is species specific. If a graph is drawn of the relative densities of GC we would get an undulating line of hills and valleys, with the gene distribution being mainly around the hill sections of the genome ...

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by scottie
Tue Jan 03, 2012 12:15 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 562
Views: 930077

5 best proofs of evolution

... (at which point they grew about 70% faster than the ancestor strain). All populations evolved larger cell volumes and lower maximum population densities, and all became specialized for living on glucose (with declines in fitness relative to the ancestor strain when grown in dissimilar nutrients). ...

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by RichardDawkins
Wed Nov 03, 2010 5:38 pm
 
Forum: Evolution
Topic: 5 best proofs of evolution
Replies: 170
Views: 245406

Re: Experimental evidence for evolution

... were almost exact copies of each other. The other observation he noted was that the same patterns exist in the equivalent Alu (which are SINES) densities of the human genome. This pattern also exists in other mammalian genomes. That is why he refers to the patterns as being remarkable. Now it ...

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by jevg
Sun Jul 25, 2010 10:17 am
 
Forum: Evolution
Topic: Experimental evidence for evolution
Replies: 103
Views: 179768

Re: Experimental evidence for evolution

... open the url in a new tab http://www.nature.com/nature/journal/v428/n6982/fig_tab/nature02426_F9.html Figure 9d of the paper shows the relative densities of SINE’s (Short Interspersed Nuclear Elements) and LINEs (Long Interspersed Nuclear Elements). Both these elements are types of mobile DNA ...

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by jevg
Wed Jul 21, 2010 10:36 am
 
Forum: Evolution
Topic: Experimental evidence for evolution
Replies: 103
Views: 179768
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