- AskScience AMA Series: I'm Dr. Jennifer Cope, a medical epidemiologist at the U.S. Centers for Disease Control and Prevention. I am here to talk about contact lenses and healthy wear and care habits. AMA!
- What are the most advanced computers in the world being used for?
- How do scientists know how the earth was formed?
- Is sexual dimorphism (males and females having different sizes/appearances) a trait that arises independently in species or can we trace it back to an origination point on the evolutionary tree?
- [Biochemistry] How can proteins from different sources have such different effects on the metabolism? Aren't they all mainly aminoacids when they are digested?
- How does 5g provide faster internet speeds than a WiFi router? I.e. how is a wireless connection now faster than a wired one!
- Does freezing dead bodies kill any diseases they may have?
- In the ocean, when surrounded by rough water, why are there often patches of flat still water?
- Why is the standard nominal voltage of most batteries ~3.6- 4.2V?
- when they say things like a nuclear bomb could cause a blackout, what happens to the electricity? how does it work?
- In batch-based machine learning, is the update for the RMSprop term calculated within each iteration of each batch, or at the end of each batch using the aggregated weight updates of that batch?
- What can you do with a synchrotron that you can’t do with an electron microprobe?
- How have the effects of the Moon changed as it gets farther away?
- Are there any examples of an invasive species being introduced to an area and that area flourishing?
| Posted: 20 Aug 2019 04:00 AM PDT Hello! I am a medical epidemiologist and infectious disease doctor at CDC in the Waterborne Disease Prevention Branch. I work to prevent and stop infections caused by free-living amebas, which are single-celled organisms found in water and soil. Free-living amebas can cause diseases ranging from a type of encephalitis, or brain infection, to serious eye infections. I support epidemiologic, laboratory, and communication activities related to free-living ameba infections. Acanthamoeba is a free-living ameba that can get on your contact lenses and cause a painful and disruptive infection called Acanthamoeba keratitis (AK). Acanthamoeba keratitis can lead to vision problems, the need for a corneal transplant, or blindness. Luckily, AK and other contact lens-related eye infections are largely preventable. I also work with the CDC Healthy Contact Lens Program to help people learn about contact lens-related eye infections and the healthy habits that can reduce your chances of getting an eye infection. For more information about the CDC Healthy Contact Lens Program and our contact lens recommendations, visit our website: https://www.cdc.gov/contactlenses/index.html. My team conducted new research on the communication between eye care providers and patients on contact health. Read the new MMWR report here: https://www.cdc.gov/mmwr/volumes/68/wr/mm6832a2.htm. I'll be on from 1-3pm (ET, 17-19 UT), AMA! [link] [comments]  |
| What are the most advanced computers in the world being used for? Posted: 20 Aug 2019 03:26 AM PDT |
| How do scientists know how the earth was formed? Posted: 20 Aug 2019 01:47 AM PDT Have been educating myself on earth science, and just science in general. :) [link] [comments]  |
| Posted: 19 Aug 2019 07:37 PM PDT Large, more muscular males, smaller females. I know there are exceptions, but it seems pretty predominant within a lot of the animal kingdom. Can this sort of similarity all be traced back to a common ancestor? [link] [comments]  |
| Posted: 20 Aug 2019 02:03 AM PDT I have some background in biology but none in nutrition. Is it that certain proteins have signature peptides that are formed when digested and then they are absorbed by the intestines? Does it have to do with the concentration of different aminoacids in a particular protein? Where do gut bacteria come in? I am thinking about mostly animal proteins shown to cause inflammation in humans and the emergence of the casomorphins in conjunction with dairy digestion. [link] [comments]  |
| Posted: 20 Aug 2019 02:18 AM PDT |
| Does freezing dead bodies kill any diseases they may have? Posted: 19 Aug 2019 01:15 PM PDT I have pet rats. I am getting a pet snake over the weekend and am wondering if its safer to feed frozen mice vs live mice. Feeder mice can be carriers of disease so I want to be as safe as possible. On a more fun note, if a human body that had been preserved in ice for decades suddenly thawed, could that cause there introduction of (Previously extinct) deadly diseases into society? [link] [comments]  |
| In the ocean, when surrounded by rough water, why are there often patches of flat still water? Posted: 19 Aug 2019 01:37 PM PDT |
| Why is the standard nominal voltage of most batteries ~3.6- 4.2V? Posted: 19 Aug 2019 01:36 PM PDT It seems that even batteries of different internal chemistry all have the same range of charged voltages when sensitive digital applications are involved (e.g., li-po cells in phones, 18650 batteries in laptops etc.). Where does this standard come from and what is its significance? [link] [comments]  |
| Posted: 19 Aug 2019 09:15 AM PDT |
| Posted: 19 Aug 2019 10:19 AM PDT |
| What can you do with a synchrotron that you can’t do with an electron microprobe? Posted: 19 Aug 2019 09:50 AM PDT I have done some synchrotron stuff, but never use an electron microscope and am wondering more about it. I am a soil chemist and focus a lot on redox chemistry. Would it be the EXAFS are only with synchrotron but XANES can be done on a microprobe? Is it the fluorescence stuff microprobes can't analyze? Is it a different range in energy levels? Just curious, thanks! [link] [comments]  |
| How have the effects of the Moon changed as it gets farther away? Posted: 19 Aug 2019 08:15 AM PDT The Moon moves away from Earth approximately 1.6 inches per year. Since it is approximately 4.5 billion years old, it has moved 113,636 miles away. I assume the tidal forces have weakened over time, but have there been any other changes? [link] [comments]  |
| Are there any examples of an invasive species being introduced to an area and that area flourishing? Posted: 19 Aug 2019 04:12 AM PDT |
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