Does a cat purr manually or automatically? Is it aware of it's own purring? Does purring have an effect on the cat? |
- Does a cat purr manually or automatically? Is it aware of it's own purring? Does purring have an effect on the cat?
- One of the main reasons so many die from the flu and coronavirus is because of pneumonia. Since we have pneumonia vaccines, why is it not standard procedure to have the public get vaccinated for pneumonia?
- In electricity, where does the flow of electrons actually come from?
- Do planets slowly grow in size?
- Has the weight or mass of Earth changed overtime?
- What did the tropics look like during the last ice age?
- How do you find the boiling point of something in a different atmospheric pressure?
- Can 241Am spontaneously generate 243Bk?
- How does the gut microbiome recover after a very strong antibiotic course?
- During negative selection in the thymus, what mechanisms determine if T-cells bind too strongly to self-peptides and are eliminated?
- How does alcohol kill everything from bacteria to viruses and more?
- Can a Regulatory(Suppressor) T-Cell "protect" cancer cells from NK Cells and the rest of the immune system?
- Are quantum mechanics interpretations falsifiable?
- What causes Earth’s magnetic poles to reverse?
- How can nuclear fusion reactor withstand the insanely high temperatures of plasma?
- Is Sars-CoV-2 / Covid 19 spread solely through humans around the globe or are there any other potential disease vectors like birds spreading it as well?
- How does the new antiviral drug patented for COVID-19, Fapilavir, work?
| Posted: 27 Feb 2020 09:20 PM PST Do cats turn it on or is it a response to something? If it's a response then what exactly is telling the purring to activate and cease? What evolutionary benifit is purring believed to grant? [link] [comments]  |
| Posted: 28 Feb 2020 04:40 AM PST |
| In electricity, where does the flow of electrons actually come from? Posted: 27 Feb 2020 02:59 PM PST When a turbine spins and electrons flow through the cable, where do they originate from? Are they coming off of the copper or iron itself? If that is what happens, that must damage the material right? [link] [comments]  |
| Do planets slowly grow in size? Posted: 28 Feb 2020 02:44 AM PST Asking because of archaeology. Seriously old stuff found really deep underground suggests it does right? [link] [comments]  |
| Has the weight or mass of Earth changed overtime? Posted: 27 Feb 2020 01:29 PM PST For example if everything were even, all the resources on Earth have always been here and the contributed to the weight or mass of earth. We take those resources and make things. Sometimes the things we make emit gases or substances that upon leaving the atmosphere don't weigh on the Earth anymore. Then all the space debris we've sent into outer space. So, is the Earth lighter than say 25,000 years ago? 1,000,000 years ago? [link] [comments]  |
| What did the tropics look like during the last ice age? Posted: 27 Feb 2020 10:35 AM PST (yes, I know that we're still in one of many ice ages, I'm talking that period of time that popular culture has decided is the ice age) I often see cool maps and renderings of Europe and North America, with glaciers stretching into Germany or Wisconsin or whatever. But I don't think I've seen any description of tropical areas (Amazon, Congo, Borneo, and the like) during that period. What did average temperatures look like around that time? Were there still rainforests? And what kinds of interesting species were living in that area? [link] [comments]  |
| How do you find the boiling point of something in a different atmospheric pressure? Posted: 27 Feb 2020 02:46 PM PST So I was reading the book Artemis, and in it, they're basically a moon colony, and it mentions that coffee tastes bad to tourists because it's too cold to them due to the boiling point being lower because of the lack of atmosphere and the pressure of the colony domes being way lower(I don't remember the number they used). So I got to wondering because I know Mercury has an almost non-existant atmosphere, and it's also really hot(800F according to Google), so I checked, and the surface is made of silica(silicon dioxide) and that has a boiling point of 3,110F on Earth, so I wanted to find out how close to boiling that is on Mercury, but I can't find how to calculate the boiling point of silica(or anything) in a different atmospheric pressure. [link] [comments]  |
| Can 241Am spontaneously generate 243Bk? Posted: 27 Feb 2020 03:44 PM PST As most of you may know, Berkelium was discovered after a surface of Americium-241 was bombarded with high energy alpha particles. This had got me wondering; as 241Am decays, it can occasionally produce a high energy alpha particle. If said alpha particle hits the nuclei of a nearby 241Am nucleus, wouldn't that generate 243Bk (just as in the original synthesis)? So, would this mean that any given sample of Americium-241 potentially has a few atoms of Berkelium in it? [link] [comments]  |
| How does the gut microbiome recover after a very strong antibiotic course? Posted: 27 Feb 2020 11:17 AM PST Let us assume that a person takes a very strong antibiotic for over a month. I presume that this will impact the gut microbiome in a bad way. Now, how will the gut microbiome recover if most of it gets affected? [link] [comments]  |
| Posted: 27 Feb 2020 04:10 PM PST From my understanding, TCRs which bind too strongly to self-peptides presented by MHC on professional antigen presenting cells or mTACs are eliminated via apoptosis to inhibit auto-immune diseases. Weak to moderate interactions are considered tolerable and the cells allowed to continue. What mechanisms exist in the cells presenting the self-peptides (or in the T-cell itself) which determine if the interaction is too strong and the T-cell needs to be eliminated? Is there something like a coupled GTPase which acts as a timer like with EF-Tu, or possibly inter-cellular proteins in the presenting cell interacting with MHC and aggregating to some threshold which can then trigger a signal to cause T-cell apoptosis? [link] [comments]  |
| How does alcohol kill everything from bacteria to viruses and more? Posted: 27 Feb 2020 08:31 AM PST I was reading some news about the coronavirus, and that it is reccomend to use alcohol based hand sanitizer. I started to wonder how isopropyl alcohol kills basically everything from a cold to the coronavirus? It seems like one of those too-good-to-be-true things. Same thing with bleach. Thanks :) Edit. I am wondering more about how it is so universal? What makes it so special? [link] [comments]  |
| Posted: 27 Feb 2020 03:17 PM PST I have been watching this anime recently, called "Cells at Work." It usually provides a well-detailed summary of certain parts of the human body and certain phases it can go through. I decided to read the manga, and in a chapter, it describes the immune system fighting off a cancer cell. However, it also shows a Regulatory T-Cell "protecting" it by not allowing an NK Cell and other parts of the immune system to attack it. I realize that cancer cells usually have different receptors than other cells, and trigger an immune response, but is it possible for a Regulatory T-Cell to not notice this difference and thus, protect the cancer cell? [link] [comments]  |
| Are quantum mechanics interpretations falsifiable? Posted: 27 Feb 2020 06:31 AM PST I'm thinking specifically of Copenhagen, Many-Worlds and de Broglie–Bohm theory. Do these interpretations always make the same predictions, or is it possible to devise a test that could rule out one or more of them? [link] [comments]  |
| What causes Earth’s magnetic poles to reverse? Posted: 27 Feb 2020 06:21 AM PST So I'm familiar with the fact that Earth's magnetic poles have sporadically reversed in the past. But why exactly would the two poles of a dipole "flip"? I've read that it's due to one field "weakening" and causing a reversal. If this is the case, what causes one field to become weaker? bless u [link] [comments]  |
| How can nuclear fusion reactor withstand the insanely high temperatures of plasma? Posted: 27 Feb 2020 06:15 AM PST So in the concept of nuclear fusion we create plasma in a chamber which at this scale would require temperatures even hotter than those of the sun. Why doesn't the reactorwalls just smelt? How is it possible to transfer this heat energy this fast to protect the reactor from just sublimating? [link] [comments]  |
| Posted: 27 Feb 2020 01:23 AM PST |
| How does the new antiviral drug patented for COVID-19, Fapilavir, work? Posted: 27 Feb 2020 12:01 AM PST I'm a medical student, and was curious about how we're treating the virus. Couldn't find much information on the drug while googling. I'd heard that in Thailand they managed to use Oseltamavir to cure COVID, since coronaviruses have neuraminidase activity like influenza? And on a similar note, they've been advising the use of chloroquine against COVID as well. Isn't that a heme polymerase inhibitor for malaria? How does it work as an antiviral? [link] [comments]  |
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