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What do viruses do during incubation period?
For example, there is an incubation period of around 1 to 3 days for common cold, and that of AIDS can range over to decades.
What do viruses do actually do during the incubation period?
What triggers them to turn active again?
hello all
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How are Maggots Sterilized (Disinfected)?
For maggot therapy, how are maggots disinfected? I'd imagine there's a limited scope of measurements that can be taken to sterilize the maggots - i.e. we don't want to sterilize them and kill them too.
Dissenter
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Are there issues with filling PCR tubes to capacity?
I'm planning to scale up a PCR reaction, and I'm wondering if filling the PCR tubes to the maximum volume of 200 ul would be a problem. It would mean a lot less pipetting as I would only need 1/4 of the tubes.
The typical protocols I've seen always…
Mad Scientist
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Can genes change as we age?
Let's say you're a 23-year-old man who impregnates a woman. Will your genes be the same if you were to impregnate another woman at age 35? Will your genes in those 12 years have changed/mutated/become smarter?
Marin
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Organ cloning - possible to make a non-antigenic organ?
From a J. Neil Schulman article on Organ Cloning:
Cannibalizing organs from other people also entails the risk of
rejection because of incompatibilities, not only for tissue-typing but
also for gross anatomical mismatches. Cloning organs [...]…
John C
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If all B cells are present at birth, why should the primary response to an infection take longer than the secondary response?
When learning about the immune response, my teacher mentioned that all the bodies B cells are present at birth, and there is one to counter every disease. But if this is the case, why should the primary response take a long time?
As far as I know,…
J_mie6
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Are there differences in DNA between humans of today and humans from 2000 years ago?
Are there any significant differences in our genome compared to the genes of our ancestors from 1000-2000 years ago?
And if there are significant differences, do they result in significant differences in phenotypic traits?
Rox
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Do tall people have more cells?
Within a single species, how does the relative number of cells in the body relate to the relative size of the organism?
Let's say we take two humans, one of them is 6 feet tall and the other one is 5 feet tall. They have similar BMI, age, physical…
Superbest
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How do we know the brain flips images projected on the retina back around?
Why do we turn images upside down again rather than dealing with them directly, still vertically rotated after passing through our lens?
I don't see how that would cause any problems, and how we'd ever be able to figure out if we are presented with…
Chris
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What's the minimum distance of focus for the lens of a human eye to reach maximum flatness?
According to the Wikipedia article on eye accomodation, the range in which a human eye can focus is from 7 centimetres away up to essentially an infinite distance. Of course, people can't see things an infinite distance away, but at a certain point…
Questioner
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Why is Portuguese man o' war considered a colony?
The wikipedia entry on the Portuguese man o' war says:
... the Portuguese man o' war is ... not actually a single multicellular organism but a colonial organism made up of many highly specialized minute individuals called zooids. These zooids are…
yshavit
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Can fruit tissue be cultured and grown independent from the plant?
Can fruit tissue be grown in a tissue culture as is done to other plant tissues? From the answer to this question, I learned that fruit is alive. Could it be possible to manufacture fruit products without plants, using this method?
J. Musser
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What is the mechanism that directs myosin walking?
Myosin, dynein and kinase all "walk" towards specific ends of the microtubule or actin filament they are on. I'm most familiar with the walking mechanism for myosin, where ATP fuels conformal changes in the binding region, but I don't understand how…
Emmie MC
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When are population dynamics models useful?
When are population dynamics models useful? There seems to have been a lot of research about it, but how does it help? If I need data about how a population will evolve under what conditions, I need it because I need data for a decision (such as…
thejh
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How are antibiotic resistant bacterial infections treated?
For example, how are infections of antibiotic resistant strains of MRSA, Streptococcus, or Gonorrhea treated?
Well Actually
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