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8 votes

Cough at 1000 km/h?

This reference from CHEST lists 21 clinically measured peak flow rates during various modes of coughing. Of these patients, and for unassisted cough, the highest peak flow is about 4 liters/sec. The ...
docscience's user avatar
6 votes

How to convert skin temperature to core temperature?

The measurement of core temperature (it is the right term*) is easy using an invasive method. It is also reliable since: Core temperature is easy to measure and temperatures are relatively ...
SoFar67's user avatar
  • 121
5 votes

Are there any biometrics that can measure tiredness (sleepiness)?

Most of the sleep-deprivation studies I've seen measure cognitive impairment as a way of quantifying sleepiness, similar to some of the metrics taken in drug and alcohol intoxication studies. Here's a ...
MikeyC's user avatar
  • 4,744
4 votes

What is the average speed of human sneeze?

About 35-40mph According to the Mythbursters who subjected this to their tests showed that their own sneezes went around 35 to 40mph. This is anecdotal since it only has a sample size of two persons, ...
Hyfnae's user avatar
  • 238
4 votes

What is the easiest way to measure a human body surface area?

How cost efficient does it has to be? Do you want these data to be comparable to another study? Fundamental issues What do you call surface area? The interior of the guts (interior of the mouth, ...
Remi.b's user avatar
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4 votes
Accepted

How can I measure the population growth of yeast?

The standard way to measure growth in a liquid culture is to measure the optical density (OD) of the solution – basically, how cloudy it is. Bacteria or yeast in a solution will absorb light that ...
divibisan's user avatar
  • 370
4 votes
Accepted

What is the significance of the amplitude of brain waves?

Brain waves are a colloquial term for EEG recordings. EEG recordings are gross potential recordings, in other words, they represent the responses of thousands of neurons together. Much of the ...
AliceD's user avatar
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4 votes

How do we know for sure that Morus nigra (black mulberry) is tetratetracontaploidic (has 44 copies of each of its seven chromosomes)?

The linked paper in the question has reference 8: Toyo I (1985) Research of polyploidy and its application in Morus. Japan Agricultural Research Quarterly 18: 222–228. PDF here This paper mentions a ...
bob1's user avatar
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4 votes
Accepted

How much does dry moose scat weigh and vary in dry weight?

MacCracken and Van Ballenberge, 1987 report that pellet size varies a bit by sex and age; male pellet dry weight (all measurements are dry) averaged 1.9 grams (range 0.9-2.9), female 1.3 g (range 0.6-...
Bryan Krause's user avatar
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3 votes
Accepted

My bathroom connected scale pretend telling me my total body water level? How could it do that?

Your scale exploits the difference in electrical properties of water and fat to measure the composition of your body. This method is called bioelectric impedance analysis (BIA), and it is usually used ...
Domen's user avatar
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3 votes
Accepted

Definition of semiquantitative

Caveat: This answer differs fundamentally from that given by @acvill. I have not provided authoritative support for it — it is merely my understanding of the use of the terms in biological science. ...
David's user avatar
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3 votes
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A way to measure ripeness of a fruit

Asides from just eyeballing the change in color/consistency, Wikipedia suggests using iodine for a qualitative measurement (though without reference): Iodine (I) can be used to determine whether ...
Koen vd H's user avatar
  • 837
3 votes
Accepted

How do you determine the length of an annelid?

Leeches: According to Taube (1966)$^1$: The adults of American leeches range from about 1/4 inch to 12 inches in contracted length. Because leeches can bloat to more than 10x their "normal"...
theforestecologist's user avatar
3 votes
Accepted

What would EEG recordings reveal if their resolution was better?

The temporal resolution of EEG is already considered to be very good. The problem is spatial resolution. Even the loss of very high frequency activity, like individual spikes, is really a problem of ...
Bryan Krause's user avatar
  • 46.1k
2 votes

What is the average speed of human sneeze?

Results seem to vary wildly depending on the methodology. Charles' article on plos.org seems to be serious, and is very complete. Still, looking at an earlier study of Penn State University published ...
AeonOfTime's user avatar
2 votes

How would you measure the diameter/radius of a non-circular bacterial zone of inhibition?

We actually did something like this in one of my periods in biology class, all you need to do is take your measurement in millimeters. This measures the radius of the zone of inhibition. Multiply that ...
angelindisguise's user avatar
2 votes

How can I measure bee and wasp population?

Short Answer No. You cannot appropriately examine population dynamics using the approach you've described. You can, however, examine how foraging frequencies vary/correlate with field spraying (...
theforestecologist's user avatar
1 vote

Measures of animal intelligence

There is no easy way to quantify intelligence because it's poorly defined. I would suggest narrowing your focus on measurable behaviour as a proxy for intelligence, and looking at the many behavioral ...
Spare's user avatar
  • 11
1 vote

Measures of animal intelligence

EQ or EZ can be helpful with several qualifiers. you should account for differences among groups, birds for instance have smaller brains than mammals for what most would consider similar intelligence,...
John's user avatar
  • 14.8k
1 vote

Measures of animal intelligence

There isn't really a good answer, since we don't have a singular quantifiable measure of intelligence for humans, let alone other species. Any human measures of intelligence might not apply properly ...
techno156's user avatar
  • 131
1 vote

Definition of semiquantitative

There is no strict statistical definition of semi-quantitative. Generally, a quantitative method yields results that can be compared across different experiments, whereas a qualitative method yields ...
acvill's user avatar
  • 8,296
1 vote

Why Account for Phylogeny when using Relative Brain Size as a Surragate for Intelligence

It seems they were attempting to correct for other behaviors/ecological niches that were correlated with brain size, but were not related to "urban tolerance". Their work includes much data ...
Armand's user avatar
  • 1,721
1 vote

Why is thymidine incorporation (DPM) normalized to per mg protein content while testing for cell proliferation?

I'm not sure that there is a strongly disciplined reason for the mg protein content as the normalization, but there is obviously a need for some normalization for different amounts of tissue- if you ...
Maximilian Press's user avatar
1 vote

How to estimate mRNA counts from Relative Promoter Units (RPU) or RNAP per second (PoPS) in E. coli?

I could not find any paper that discusses these issues. So this answer is just based on my guess. From the this page: Transcription rate is generally a parameter associated with a particular ...
WYSIWYG's user avatar
  • 35.6k
1 vote
Accepted

What does this biomass measurement mean and how to translate it to volume

50 g m-2 d-1 translates to "50 grams per square meter per day": the negative signs are negative exponents (check a math textbook). This is equivalent to writing ((50 g)/m2)/day You cannot transform ...
Bryan Krause's user avatar
  • 46.1k
1 vote

Measuring the Rate of Photosynthesis

One of the simplest measures of photosynthesis is just measuring how much your plants grow (i.e., weigh them). Of course this technique is imperfect because of other influences on growth, the amount ...
Bryan Krause's user avatar
  • 46.1k

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