| How long would it take after a vaccine for COVID-19 is approved for use would it take to make 250 Million doses and give it to Americans? Posted: 22 Apr 2020 01:18 PM PDT Edit: For the constant hate comments that appear about me make this about America. It wasn't out of selfishness. It just happens to be where I live and it doesn't take much of a scientist to understand its not going to go smoothly here with all the anti-vax nuts and misinformation. Edit 2: I said 250 million to factor out people that already have had the virus and the anti-vax people who are going to refuse and die. It was still a pretty rough guess but I am well aware there are 350 million Americans. submitted by /u/YOUgotGRIZZEDon [link] [comments] |
| What makes some viruses seasonal? Posted: 22 Apr 2020 10:11 AM PDT How do we know when something is "seasonal"? Are there any truly seasonal viruses? Is it really human behavior during the seasons that's key, or are some viruses just naturally only able to spread under certain seasonal weather conditions? Thanks for any help in understanding this. submitted by /u/Nora_Oie [link] [comments] |
| AskScience AMA Series: My name is Greg Asner and I am an ecologist who uses satellite imaging technology to study ecosystems and climate change. Ask me anything! Posted: 23 Apr 2020 04:00 AM PDT My work was featured in the new documentary "H20: The Molecule That Made Us" which premiered last night on PBS. You can stream the film on pbs.org or on the PBS Video App on your Smart TV. http://pbs.org/molecule Greg Asner the Director of the ASU Center for Global Discovery and Conservation Science in Hilo, Hawai'i. Dr. Asner's scientific research focuses on interactions between society, climate and ecosystems through a combination of extensive field work and community engagement, aerial and satellite-based mapping, and computer modeling. His work has uncovered rapid human-ecological change throughout the world's forests and coral reefs. He has published more than 600 scientific articles. Dr. Asner has served in numerous national and international programs, including as a Senior Fellow for the U.S. State Department. Asner is a recipient of the Presidential Early Career from former president Bill Clinton in 2000. He was elected to the U.S. National Academy of Sciences in 2013 and he won the Heinz Award for Environment in 2017. Because "H20: The Molecule That Made Us" is partnering with PBS series NOVA for outreach around the film, I'll be posting under NOVA's account: u/novapbs. Looking forward to answering your questions about my research and observations. I'll be on at 3pm ET (19 UT), ask me anything! submitted by /u/AskScienceModerator [link] [comments] |
| What would happen if you peeled an orange and removed a segment from it while it is still growing on a branch? Posted: 22 Apr 2020 09:41 AM PDT |
| What are some examples of viruses that do not provide immunity post infection? Posted: 23 Apr 2020 04:49 AM PDT All the COVID news releases saying "There's no evidence being infected provides immunity." I understand that it's researchers choosing their words carefully, since there's not evidence about a lot of things COVID related because it's so new; and policymakers don't want people to start thinking their immune and taking unnecessary risks. I always thought once you had a specific virus you were immune to it until it until it mutated. I'm also not talking about colds and flus here because those are caused by several different types of viruses and have different serotypes. So is it really possible that a viral infection could provide no immunity? submitted by /u/pennypurplepyramid [link] [comments] |
| When plants send out roots are they searching for nutrients or microbe communities that are making nutrients available to plants? Posted: 22 Apr 2020 09:44 AM PDT If they are searching for communities are there certain microbes or microbe isolates that encourage rooting or root growth? submitted by /u/xeoxemachine [link] [comments] |
| If a vaccine for covid19 is possible why has no one created a vaccine for the common cold before? Posted: 22 Apr 2020 11:48 PM PDT Given that natural herd immunity seems an unlikely answer to he pandemic (it didn't stop polio or smallpox etc) and I often hear people talking about a vaccine being a year or so away, I have to ask if it's realistic at all. There is every incentive to create a vaccine for the common cold. Both financially and in terms of medical renown. And yet to the best of my knowledge its never been done. Given that covid is a cold virus what are the chances of it being possible now? submitted by /u/zaraths [link] [comments] |
| Why is acceleration due to gravity less at the equator than at the poles? Posted: 22 Apr 2020 04:41 PM PDT I know that the Earth is not a symmetrical sphere and bulges at the equator so hence objects at the equator are relatively further away from Earth's centre of mass than objects at the poles. But I read somewhere that orbiting/circumnavigating the Earth's axis had some part to play in why objects at the equator experience less gravity. Could someone please explain this to me? submitted by /u/OverCastStudios [link] [comments] |
| How does the soil appears on volcanic islands ? Posted: 23 Apr 2020 01:37 AM PDT When an island is created by a submarine volcano, at the beginning there is only black volcanic rock. Then after some time (million years I guess) it looks like a natural environnement with jungles...etc I understand how living organismes can be brought with the see, but where does the soil/dirt comes from ? submitted by /u/Owny33x [link] [comments] |
| What replaces the space that your adult teeth occupied when they grow in? Posted: 22 Apr 2020 06:38 PM PDT I know that babies are born with all their teeth, so what fills that extra space when the baby teeth fall out? submitted by /u/Groezy [link] [comments] |
| Is the number of quarks minus the number of antimatter quarks in the universe constant? Posted: 22 Apr 2020 02:21 PM PDT Q > number of quarks in the universe, wherever they are (e.g. in a proton) incl. all flavors, etc. A > number of antimatter quarks in the universe C = Q - A Is the count number C a constant? submitted by /u/avance70 [link] [comments] |
| Why do we experience pain differently depending on where the pain is coming from? Posted: 22 Apr 2020 08:19 AM PDT We've all experienced pain, but pain feels different depending on where it's located. If you get hit in the kidney you feel a particular type of pain. If you have nerve pain you feel a particular type of pain. If you have a headache you feel a particular type of pain. Why is this the case? Is there an evolutionary reason for this and are sensory nerves constructed differently depending on the location of the body/ pain such as your kidneys, nerves, head etc? Thank you. submitted by /u/Carbonated-h20 [link] [comments] |
| Is it possible for a vaccine to give a stronger immunity than infection with a live, non-attenuated virus? Posted: 22 Apr 2020 08:20 PM PDT |
| What is quadrupole estimator in cosmology? Posted: 22 Apr 2020 01:53 PM PDT I am in graduate school and I have been hearing about quadrupole and hexadecapole estimators in context of cosmology however I have not been able to find any good pedagogical text on what they actually mean. Any reference at graduate student level would be appreciated. submitted by /u/cosmosis814 [link] [comments] |
| Why there is no pandemic caused by bacteria? Does this mean the virus is more dangerous than bacteria? Posted: 22 Apr 2020 07:52 AM PDT |
| Peak analysis - How to treat statistical uncertainties? Posted: 22 Apr 2020 02:11 PM PDT Dear redditors, I have a question regarding the peak analysis of experimental signals. For example in photoelectron spectroscopy you measure spectra with a background signal and more intense peak. Typically the background is quite noisy, while the peak looks smooth. For each bin E to E+Delta E there is the count rate c(E). Interpreting each bin as an count experiment the standard deviation is s(E)=sqrt(c(E)). If I apply a fit which takes into account the statistical uncertainty for each measuered bin, the noisy background has a much higher weight, because sqrt(c(E)) is smaller for the background than for the peak. Just from my feeling this is weird. And sometimes I see that fits are worse compared to those neglecting the statistical uncertainty. Is this procedure wrong? How can I do better? A reference to literature would also help me. Thanks for suggestions and stay at home and stay healthy submitted by /u/Gedankensortieren [link] [comments] |
| Does COVID-19 cause a positive test for influenza? Posted: 22 Apr 2020 08:58 AM PDT I'm writing this because I was extremely sick in early January. I'm a generally healthy 21M that works manual labor and I get exposed to a lot of dirt/manholes/bacteria in general and hadn't been sick in years. Then after I traveled for Christmas I was sicker than I'd ever been in my life. I had all the symptoms of coronavirus, but I ended up testing positive for influenza B. How do they determine what you are sick with? This peaked my interest because of a twitter thread awhile back that also said they had the worst flu strain of their life. With the recent reports of the virus being in the US much earlier it seems plausible I could've had the virus. However, I'm by no means a medical expert and might have been an unlucky host of a terrible flu strain. Thanks in advance! submitted by /u/SloppyBeerTits [link] [comments] |
| What sort of electrical activity is going on in the brains of animals that can survive periods of being frozen, when they are frozen? Posted: 22 Apr 2020 03:18 AM PDT I (think) understand how urea and glucose are concentrated in the body in order to prevent freezing from forming ice crystals that damage cells but how does an actual frozen brain work? Is it...inert? Does it still carry a "charge" waiting for the body to recover and kickstart it again or is it the other way around? I always assumed creatures that can survive freezing maintained an unfrozen brain (or life would simply stop existing when it froze) but apparently wood frogs brains actually freeze as well. submitted by /u/DasFlo25 [link] [comments] |
| How to certain birds (eagles and such) see fish in the water? Posted: 22 Apr 2020 08:38 AM PDT I understand they have much better vision and can understand how they see animals on land, but are their eyes also polarized or something to a point where they can see into the water, and is that how they are able to hunt for fish? submitted by /u/Artyom3434 [link] [comments] |
| Why does epsom salt (magnesium sulfate) work to revive dead lead-acid batteries? Posted: 22 Apr 2020 07:43 AM PDT I know the quick answer is "it removes the sulfation from the plates" but I was hoping for a little more in-depth answer. Quick background: I have a 48V golf cart. The battery bank consists of six 8V batteries wired in series. I parked it shortly after Thanksgiving but forgot to plug it in. Fast forward to early March and the batteries are kaput, barely showing 1V in each battery. I tried getting a quick surface charge on them but was unable to get any battery over 6V. Replacing all the batteries would cost over $700...ew. I remembered reading about the Epsom salt trick so I gave it a shot (read below for a quick synopsis). After a few charging cycles and a lot of bubbly activity heard, the cart seems to work just as well as it did before. Understand that this doesn't work for "dead cells", internal short circuits, or heavily corroded internals. This fix will only work with a relatively healthy, serviceable lead acid battery if the plates have heavy sulfation. I guess my question is, how does a sulfate remove sulfation? Can anyone explain this? None of the places I've read this fix have actually gotten into the chemistry of why this works. Thanks! Epsom salt trick: Mix 4oz (weight)/qt warm distilled water. Drain half the electrolyte from each battery and fill with the Epsom salt solution above the plates (a turkey baster works well). Let sit for a few hours, put on a charger and it should revive the battery. submitted by /u/KaHOnas [link] [comments] |
