What do the small gems in watches actually do? |
- What do the small gems in watches actually do?
- Do antibodies continually update with repeated exposure?
- Has the Earth's air pressure changed over time?
- How are topical medicines absorbed into the skin? What really affects how well they are absorbed? (Rubbing? Cleaning the skin? Temperature?)
- What is the difference between shark and mammalian placenta?
| What do the small gems in watches actually do? Posted: 21 Dec 2021 11:38 PM PST |
| Do antibodies continually update with repeated exposure? Posted: 21 Dec 2021 06:58 PM PST Obviously COVID related… But if one encounters a virus, and survives to produce antibodies against this virus. Will repeated non-infectious exposure over time update the antibodies to any slight variations in the antigen? Or is infection, and therefore a complete bypass of the adaptive immunity, necessary for the creation of new antibodies? [link] [comments] |
| Has the Earth's air pressure changed over time? Posted: 21 Dec 2021 01:54 PM PST I know the make-up of Earth's atmosphere has changed a lot over time, but has the overall air pressure stayed the same since the Earth solidified? Or does a palpable amount of hydrogen get blown away by solar winds on a geological timescale? If I opened a portal through time, what would happen at different points in history? How quickly would the air flow inwards/outwards and mix? Thanks in advance for any & all answers! [link] [comments] |
| Posted: 21 Dec 2021 03:15 PM PST I'm thinking mostly of medicated ointments intended to treat skin conditions such as rashes or burns. Do these enter into skin cells? Nerve cells? Are they just soaked into the bloodstream like a transdermal patch? If I put Benadryl (diphenhydramine) ointment on a skin rash, how is that different from taking the same compound in a pill? Is the difference primarily that the ointment covers my irritated skin with oily stuff, or does the delivery of the medicine directly to the affected area actually matter? Does "rubbing it in" matter? Does rubbing an ointment on the skin actually make more of it get absorbed quickly, or is it mostly just a distracting massage? [link] [comments] |
| What is the difference between shark and mammalian placenta? Posted: 21 Dec 2021 08:46 PM PST Hi all, My question is what's the difference between mammal and shark placenta? Do shark placenta also utilize edegenous retrovirus proteins to protect the baby shark from being attacked by the mother shark's immune system? Thanks! [link] [comments] |
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