Is there a science about knots and what gives them their strength? |
- Is there a science about knots and what gives them their strength?
- Can antibodies be cloned for mass distribution?
- [Biochem] Is it possible to skip the regulation step in glycolysis by going through the pentose phosphate pathway?
- How does an octopus change color to match their surrounding?
- Why does wood ash contain traces of heavy metals?
- Is there some sort of evidence that the present "common cold" human coronaviruses were once just as bad as SARS-cov-2 is now, or worse, like SARS-cov or MERS?
- What is the most stable structure of Si2O2?
- Why is there so much implantation bleeding for such a small blastocyst?
- how much information on internal anatomy can we get from non-skeletal fossils?
- If you're looking at an object that is in water from directly above (say via drone), will that object look bigger in water than it really is?
- What is the greatest increase in size within a short period of time of an animal?
- How does NASA calculate the orbits for missions between Earth and Mars?
| Is there a science about knots and what gives them their strength? Posted: 17 Apr 2020 06:14 PM PDT |
| Can antibodies be cloned for mass distribution? Posted: 17 Apr 2020 04:42 PM PDT With vaccines taking so long to develop, I was wondering if it is possible to take antibodies from someone who had an illness (like covid 19) early and mass produce them through cloning for distribution to the rest of the unprotected public? [link] [comments]  |
| Posted: 17 Apr 2020 07:09 PM PDT Two intermediates in the pentose phosphate pathway are glyceraldehyde-3-phosphate and fructose-6-phosphate and they are also intermediates in glycolysis. Isn't it possible for them to skip the regulatory enzyme phosphofructokinase-I by going through the pentose pathway instead? In that way can't we just infinitely create the products we want without regulation? [link] [comments]  |
| How does an octopus change color to match their surrounding? Posted: 17 Apr 2020 08:50 PM PDT |
| Why does wood ash contain traces of heavy metals? Posted: 17 Apr 2020 05:26 PM PDT I have been looking into using wood ash from biomass incinerators to adjust soil pH in my field. I have learned that wood ash can contain trace heavy metals such as lead, cadmium, nickel and chromium. Where do these heavy metals come from if it is just wood being burned? [link] [comments]  |
| Posted: 17 Apr 2020 05:56 PM PDT If that was likely the case, how come they got to the level of severity they presently have? Almost certainly, natural selection, either against the more vulnerable humans, or against the more lethal strains, or both to different degrees. Can we infer if one or another was much more significant than the other? Did it vary much for each different coronavirus? [link] [comments]  |
| What is the most stable structure of Si2O2? Posted: 17 Apr 2020 06:06 PM PDT I've seen research papers that suggest the existence of Si2O2. However, I'm struggling to wrap my head around what it would look like. What is the most stable structure with a net chemical formula of Si2O2? [link] [comments]  |
| Why is there so much implantation bleeding for such a small blastocyst? Posted: 17 Apr 2020 05:37 PM PDT Implantation bleeding happens when the blastocyst lodges on to the uterine wall right? But at that time it's only a few cells big right? Microscopic. So why is there so much spotting? You'd think at the size of the blastocyst any bleeding from it lodging itself into the uterine wall would be microscopic too, or maybe the size of a pin head if the bleeding was especially servere. But from what I've seen both internet wise and from friends there are more than a few drops of blood and it can last hours to a few days. Is something else also going on? I suppose my understanding is that the blastocyst just finds a comfy spot and latches on. [link] [comments]  |
| how much information on internal anatomy can we get from non-skeletal fossils? Posted: 17 Apr 2020 02:55 PM PDT for reference, i mean a fossil such as the one in this reddit post. [link] [comments]  |
| Posted: 17 Apr 2020 05:55 AM PDT I'm not sure how refractive index is in play here but let's say there are two objects in the water, let's say two swimmers and now if you measure their distance from above (via drone) it looks like they're 1 metre apart. Now are (a) the objects looking bigger under water? And thus (b) are the objects further apart than from looking from above into the water (i.e. via a drone)? If so, by what % would they look bigger/smaller/or same? Thank you! [link] [comments]  |
| What is the greatest increase in size within a short period of time of an animal? Posted: 17 Apr 2020 10:25 AM PDT |
| How does NASA calculate the orbits for missions between Earth and Mars? Posted: 16 Apr 2020 08:20 PM PDT As per this subreddit's rules, a cursory google search shows that I should be able to calculate the answer with Kepler's 3rd Law, where the period squared is equal to the semi-major axis cubed. but while this may work on paper, in practice none of the actual Mars missions have followed the theoretical values. Every tutorial I find online assumes that Earth and Mars are in circular concentric orbits (which they aren't) and that the probes themselves travel exactly 180 degrees from one side of the sun to the other (which they don't). Math time: Earth's semi-major axis is 1 AU, Mars' semi-major axis s 1.523679 AU. This means the Mars probe's semi-major axis is 1.2618395 AU. Applying Kepler's 3rd Law gives us a period of 1.417445 years. 180 degrees is half an orbit, so every Mars mission should take 0.708722 years (259 days), but the real world values vary wildly; the shortest mission took 131 days (Mariner 7), and the longest took 334 (Mars Polar Lander) The distance between Earth and Mars is not uniform, so how do space agencies calculate the launch windows? How do they know exactly when to launch and how long it will take for their probes to reach Mars? How do they account for the eccentric orbits? Is there a more complex formula than Kepler's 3rd Law? I feel like I'm asking too much at once. I apologize if my train of thought has gone off the rails. Let me know if this question doesn't make any sense. I can supply visual aids to help explain what I'm talking about if necessary; I've been trying to figure this out myself for months. [link] [comments]  |
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