Do we have any knowledge of ancient diseases? As in, do we know if dinosaurs suffered from the common flu or do we have absolutely no clue about what was around back then. |
- Do we have any knowledge of ancient diseases? As in, do we know if dinosaurs suffered from the common flu or do we have absolutely no clue about what was around back then.
- Emission lines of elements. Why the trend?
- If the atmosphere is like an ocean of air, are their rain or storm analogs in the ocean?
- Have we seen a decrease in other communicable diseases as a result of social distancing?
- How can Animals contract COVID19 but not spread it to us?
- What is the advantage of a "banana blade" fan over a regular blade fan?
- Why is the placebo Vitamin-C in this COVID-19 clinical trial?
- Are supernovae radially symmetric?
- What is the foam that is generated by pasta when it boils? Why is there so much of it?
- Did they find a relationship between smoking and Coronavirus deaths ?
- Is there any relationship between sugar intake and brain performance on humans?
- How would the contagiousness (R0) of seasonal flu compare to COVID-19 virus, if nobody was immune to flu either?
- How do they figure out the meaning of lost ancient dialects that have just been discovered?
- How does one track the “origin” of a virus, COVID or other. How do you know what nucleotide was there first and which one was mutated? Is viral evolution similar to microbial evolution?
- With the development of COVID-19 antibody tests, will those who test positive for the COVID-19 antibody but are asymptomatic require an initial quarantine due to the uncertain timeframe of their infection?
- What’s the deal with metallic hydrogen? How can it fuel rockets?
- Can immunocompromised people get vaccinated?
- How are glia cells sampled and studied?
- Is there any scientific evidence that soap is effective at destroying SARS-CoV-2?
- Is the California Psychological Inventory still accepted as scientific?
- Are citizen science platforms such as Zooniverse meaningful to science?
| Posted: 08 Apr 2020 05:40 PM PDT I am just curious about how big our understanding of bacteria, viruses, fungi etc. How far back does modern disease knowledge go? [link] [comments]  |
| Emission lines of elements. Why the trend? Posted: 09 Apr 2020 05:55 AM PDT I'm looking at the emission lines of elements on the periodic table. It is obvious that heavier elements emit K-alpha and K-beta rays of higher energies. Why is this so? I'm guessing it's something to do with the electrostatic charges between the nucleus and electrons to be greater in heavier elements? [link] [comments]  |
| If the atmosphere is like an ocean of air, are their rain or storm analogs in the ocean? Posted: 09 Apr 2020 04:44 AM PDT |
| Have we seen a decrease in other communicable diseases as a result of social distancing? Posted: 08 Apr 2020 10:40 AM PDT I know there is a lot of controversy over how well everyone is doing at social distancing. Despite this, have we seen any changes in the number of other diseases throughout the world or in a particular country due to social distancing/isolation? [link] [comments]  |
| How can Animals contract COVID19 but not spread it to us? Posted: 09 Apr 2020 12:31 AM PDT I read in an article that cats can contract Covid19 from us but they can't spread it to us. Is this true? If yes, I am curious as to how that works, wouldn't the virus be the same? [link] [comments]  |
| What is the advantage of a "banana blade" fan over a regular blade fan? Posted: 09 Apr 2020 05:48 AM PDT There are these newer designs of blades on an electric fan where the blades are narrower than the usual wide blade design. The marketing says that " The reason for this is that the narrower surface area of the banana blade fan design permits faster airflow without causing a drag/obstruction because of it's very small surface area. The wider fan blade design is more efficient at low speeds since the blades are only angled slightly. The banana blade design on the other hand is angle much sharper so it is not efficient at low speeds but when the airflow picks up and the fan reaches fast/optimal speed, the banana blade design runs more efficient in term of electricity relative to the traditional design at the bottom. " Is this correct? [link] [comments]  |
| Why is the placebo Vitamin-C in this COVID-19 clinical trial? Posted: 08 Apr 2020 06:06 PM PDT "To do so, the new study is enrolling 2,000 adult volunteers at 6 sites. Specifically, researchers are recruiting people who lack any COVID-19 symptoms but have been in close contact with others who have a confirmed or pending diagnosis. On a random basis, the trial participants will receive either hydroxychloroquine or a placebo pill (vitamin C) every day for two weeks. Each day during the 14-day period and then again on day 28, the participants will swab their nasal passages and send the samples to researchers so they can detect any new COVID-19 infections." Edit: I believe this is the actual trial: https://clinicaltrials.gov/ct2/show/NCT04328961#contacts Excuse me for being simple-minded, but can someone explain why this study is using Vitamin C as the "placebo"? Many of my conspiracy theorist friends are using this as fuel for their fires. Does Vitamin C have a role in host-defense/immune-system that would prevent it from functioning as a proper placebo? Looking for a well researched, formal opinion. Thank you. [link] [comments]  |
| Are supernovae radially symmetric? Posted: 08 Apr 2020 08:36 PM PDT First post here so hope I am doing this right? So I've been watching a lot of videos on youtube about the final stages of massive stars and the resultant cataclysmic space kablooie that follows. The final stages of successively fusing heavier elements, coupled with representing them as discrete shells, and then how the ultimate giant ball of Fe collapses, sits with me odd for some reason. Or rather, how it's depicted? Are coexistent shells the best way to illustrate it? Like is there really a clear and distinct boundary between regions where different elements fuse? Rather than "this fuses and then this fuses and then this fuses" aren't they all kind of going simultaneously? Or does the star have to get compact enough to get hot enough to move on to fusing the next element? And then my final question: is the collapse symmetrical? It gets presented as an all at once, from all directions, thing. But does fusion and the gravity fighting energy it produces really cease everywhere all at once? Is it effectively everywhere? Or is the collapse not symmetric and you can get things like directional supernovae that shoot out in one direction first, or more prominently, or where the energy waves interfere with one another in a cool pattern or something? I get that planetary nebulae seem to come in a variety of shapes, but even some them look pretty spherical (or circular from our perspective) so apologies if there is some obvious answer to this, I'm trying to learn more about astronomy and astrophysics. [link] [comments]  |
| What is the foam that is generated by pasta when it boils? Why is there so much of it? Posted: 08 Apr 2020 03:02 PM PDT |
| Did they find a relationship between smoking and Coronavirus deaths ? Posted: 08 Apr 2020 07:16 PM PDT |
| Is there any relationship between sugar intake and brain performance on humans? Posted: 08 Apr 2020 05:46 PM PDT |
| Posted: 08 Apr 2020 10:38 PM PDT I often read things like "COVID-19 is somewhat more contagious than the flu" or "COVID-19 virus R0 is somewhere between 3 and 4, but flu R0 is around 1.3". That naturally makes me think that COVID-19 virus is just inherently better at infecting people, independent of environmental or population factors. But what didn't occur to me until just now, is that in real life, a large proportion of the population has immunity to flu because they've been vaccinated, whereas nobody has immunity to COVID-19 virus. So if both pathogens were released into a population with no immunity to either, would flu end up being equally or more contagious than COVID-19 virus? [link] [comments]  |
| How do they figure out the meaning of lost ancient dialects that have just been discovered? Posted: 08 Apr 2020 06:29 PM PDT |
| Posted: 08 Apr 2020 07:49 PM PDT I have a PhD in pharmacognosy and I work with bacteria. I don't know much about bacterial evolution but I know that I can sequence a bacterium and find the sequence of a known strain from the same species and I align both sequences and find mutations. I can make trees and dendograms that can tell me the relationship between the bacterial species. But how does one know which was was there first? And where it originated? Thanks! [link] [comments]  |
| Posted: 08 Apr 2020 02:26 PM PDT |
| What’s the deal with metallic hydrogen? How can it fuel rockets? Posted: 08 Apr 2020 07:01 PM PDT So through browsing the web at three a.m. I heard of the concept of metallic hydrogen. Where hydrogen at high pressure acts like a metal. A lot of articles said something along the lines of "the next big thing for space travel." Why is it so important? How would the rocket even work? [link] [comments]  |
| Can immunocompromised people get vaccinated? Posted: 09 Apr 2020 12:17 AM PDT Is it different depending on whether a live or inactivated vaccine is used? [link] [comments]  |
| How are glia cells sampled and studied? Posted: 08 Apr 2020 08:17 PM PDT Today I learned that in a given tissue sample, you can isolate the mRNA and using reverse transcriptase, generate the complementary DNA and then sequence it. This gives you a snapshot of the genes that were turned on at that point in time. This had me wondering how the brain could be subjected to this method of analysis? A brief googling session says that glia cells dispose of dead neurons and other brain junk by way of the lymphatic system. I imagine glia cells would want to be sampled as shortly after entering the blood as possible where they are more numerous, but maybe there is another way glia cells are sampled. Has there been a method by which they are analyzed, apart from autopsy? [link] [comments]  |
| Is there any scientific evidence that soap is effective at destroying SARS-CoV-2? Posted: 08 Apr 2020 11:13 PM PDT Lately I have often been hearing the claim that soap or detergent is an effective method of 'killing' the SARS-CoV-2 on surfaces. For example:
Some claim it is indeed the most effective method. The claim is that the virus has a lipid layer, and therefore soap or detergent will interfere with that layer and is therefore a highly effective way of destroying the virus. However, I have not been able to find any actual research to back this claim. The only study I have found that tested this is here: https://www.thelancet.com/journals/lanmic/article/PIIS2666-5247(20)30003-330003-3/fulltext#sec1) In that study, they compared several disinfectants, including hand soap. Out of all tested, hand soap was the only disinfectant found to still have active virus after 5 minutes. That is, it was the worst performer. The CDC lists disinfectants believed to be effective against the virus, but not included in that list is detergent. In their recommendations the suggest using detergent or soap followed by a disinfectant:
https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cleaning-disinfection.html To be clear, I am not asking whether washing your hands with soap is effective, as I understand there is plenty of good evidence for this. My understanding is that the mechanism of action is to physically remove the virus from your hands, rather than to inactivate it. My question is about whether soap is an effective way of destroying the virus on surfaces as claimed in the above articles. Is there evidence to support this claim? [link] [comments]  |
| Is the California Psychological Inventory still accepted as scientific? Posted: 08 Apr 2020 02:41 PM PDT "The California Psychological Inventory (CPI) is a self-report inventory created by Harrison Gough and currently published by Consulting Psychologists Press. The test was first published in 1956, and the most recent revision was published in 1987." The CPI contains 20 scales, amongst them Dominance, Self-Acceptance, Independence, Empathy, Self-Control, Tolerance and Flexibility. (Wikipedia) In 1985, a study published in Nature ("A double-blind test of astrology") used the CPI to compare the ability of astrologers to select the CPI result that best described the personality of people based on their natal chart. The idea is that the CPI can describe personalities of a person, even if that person can't. I would like to know if the CPI is still used for scientific matters nowadays. Thanks! [link] [comments]  |
| Are citizen science platforms such as Zooniverse meaningful to science? Posted: 08 Apr 2020 10:13 AM PDT Are these programs more of a public relations thing, or does this data contribute meaningfully to science? Do certain projects help more than others? [link] [comments]  |
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