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Density

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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Re: The most boring tasks in Biology

... characteristics after changes in illumination at different iron concentrations. This involved lots of time points where I needed the cell density in the culture, so I spent many many sessions over a period of many months counting the cells in those cultures.

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by jonmoulton
Fri Aug 15, 2014 3:32 pm
 
Forum: General Discussion
Topic: The most boring tasks in Biology
Replies: 1
Views: 605

Recommendations for Bacteria Detection?

... to check the number of bacteria present in the water. I'm not as interested in particular species as I am in obtaining some idea of "bacteria density" or parts per gram. I'm not sure if it matters, but the water may be contaminated with fertilizer, soaps, etc... Is there some kind of ...

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by lodestone25
Sun Jul 27, 2014 6:20 pm
 
Forum: Microbiology
Topic: Recommendations for Bacteria Detection?
Replies: 1
Views: 526

drink water, orange juice or Cola before eating?

Drinking too much cola is not good for health. Because it contains phosphoric acid which reduces the bone density and also the reason for chronic kidney diseases. Drinking citrus juices is good for health, because it contains lot of vit C. I think if pH increased due drinking ...

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by josem
Fri Jun 27, 2014 6:06 pm
 
Forum: Physiology
Topic: drink water, orange juice or Cola before eating?
Replies: 16
Views: 36257

centrifugation of hemocytes

... the cells pelleted, they are just not viable. If you do not get any signal, you have problem with your centrifugation. Teo things to consider - density and viscosity of your sample (is that only the lymph or do you add anything?) and amount of your sample in the tube/well.

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by JackBean
Thu Jan 30, 2014 9:34 am
 
Forum: Cell Biology
Topic: centrifugation of hemocytes
Replies: 5
Views: 2597

biology

... of the measuring jug she is using in an experiment. The label on the jug claims that it measures volume to an accuracy of plus or minus 5 cm3. The density of water is about 0.999 g cm−3, which means that 100 cm3 of water should have a mass of about 100 g. She repeatedly measures out 100 cm3 samples ...

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by zak
Tue Dec 10, 2013 1:54 pm
 
Forum: General Discussion
Topic: biology
Replies: 1
Views: 999
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