- AskScience AMA Series: I am a leading researcher in the areas of cannabis plant science and plant physiology at Volcani Agriculture Research Center, in Israel. My name is Nirit Bernstein and I am researching cannabis plant sciences, and the best ways to grow medical cannabis, Ask Me Anything!
- Are Vaccines owned by company’s? Can anyone access the how-to and produce a vaccine in a lab?
- Do we know of any rare elements not found on Earth but common elsewhere?
- How fast does volume displacement propagate across any given medium?
- Why are there states of matter (like solid, liquid, etc) instead of just smooth gradient from solid to gas?
- Do immuno-modulating therapies worsen post-viral sequelae?
- Theoretically, how long might the COVID virus have been floating around in animal [bats?] communities before jumping to humans?
- When exactly do people during the illness start producing antibodies for COVID-19?
- Going faster downhill with a bike, does more weight make you faster?
- Can the cell use exosomes to secrete/remove all kinds of cell damage (including lipofuscin) or does it only work for specific toxins like beta amyloid?
- In 1960, the the average lifespan of a person with Down's syndrome was 10 years, it gradually incease and 2007, it was 40 years and is presently around 60 years. What factors caused this increase in average lifespan?
- How do planes turn?
- Can Covid antigen-tets sensitivity be improved through repeated testing?
| Posted: 26 Oct 2020 04:00 AM PDT Medical cannabis is a fast growing field and researchers are delving into the implications of cannabis for medical purposes. Israel hosts one of the world's leading primary research facilities in the area of medical cannabis. I was the first scientist in Israel to study the plant-based science of medical cannabis. I and my team work to advance the academic and applied science of the cannabis plant. Their objective is to develop basic and practical knowledge of secondary metabolism in health-beneficial plants, including cannabis, to contribute to human health and food security, while protecting the environment. Here are some links to some of my research: I will be available at 12 PM PT (3 PM ET, 19 UT), Ask Me Anything! Username: /u/Israelinsf [link] [comments]  |
| Are Vaccines owned by company’s? Can anyone access the how-to and produce a vaccine in a lab? Posted: 25 Oct 2020 01:28 PM PDT |
| Do we know of any rare elements not found on Earth but common elsewhere? Posted: 25 Oct 2020 10:59 PM PDT I was torn whether to post this here or in Ask Science: Fiction, but here goes. Science Fiction is full of "unobtainium" minerals that are not found on Earth but common elsewhere in the known universe. Star Trek's Dilithium crystals and Stargate's Naquadah are just a couple of examples. I know our knowledge of extra-terrestrial mineralogy is still fairly limited, but is there any scientific basis for this common trope? Do we know of any minerals that are more common on other planets then on Earth? [link] [comments]  |
| How fast does volume displacement propagate across any given medium? Posted: 26 Oct 2020 06:52 AM PDT I had the pleasure of jumping into an infinity pool today and watched as the water washed over the side after I jumped in. This brought a question to my mind. How fast does displacement propagate in any given medium? My thought is that it would be at the speed of light of a given medium. Can anyone provide me the knowledge on volume displacement? [link] [comments]  |
| Posted: 25 Oct 2020 09:03 AM PDT |
| Do immuno-modulating therapies worsen post-viral sequelae? Posted: 25 Oct 2020 02:42 PM PDT As doctors and researchers search for COVID19 treatments, we are seeing various anti-inflammatories come to the forefront, such as the largely-debunked hydroxychloroquine (HCQ) as well as the current guidelines for corticosteroids. We are also seeing the emergence of a "long haul" post-viral syndrome, with a thus-far unknown pathogenesis. The theory behind HCQ was that it dampens cytokines and has some antiviral action. This could potentially help critical cases avoid ARDS, but for mild and moderate cases, this would also presumably inhibit a much-needed immune response. These same cytokines and growth factors are responsible for both clearing the virus and for initiating non-fibrotic cell regeneration (see links). It seems like this potential inhibition would have implications for the use of anti-inflammatory drugs during and after infection. It would be relevant to the growing use of corticosteroids, and may even be relevant to the delayed recovery of COVID patients, particularly in ensuring full viral clearance and preventing fibrosis. Thoughts? https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2517298/ https://inflammregen.biomedcentral.com/articles/10.1186/s41232-016-0020-7 [link] [comments]  |
| Posted: 25 Oct 2020 11:41 AM PDT Would it have to have been a recent development thing since it's so highly contagious or did it do some time to have evolution cycles before we caught it? [link] [comments]  |
| When exactly do people during the illness start producing antibodies for COVID-19? Posted: 25 Oct 2020 11:41 AM PDT |
| Going faster downhill with a bike, does more weight make you faster? Posted: 25 Oct 2020 10:30 AM PDT There was a question about riding faster downhill with a bike on r/cycling. https://www.reddit.com/r/cycling/comments/jhwb68/tips_for_going_faster_downhill/ Basically OP asked how to go faster downhill and suggested that he is slower than other riders because he weighs less. I made a comment (and got downvoted) for suggesting that weight does not matter and he should improve aerodynamics and get better tires with less rolling resistance. I think I remember an experiment from physics class with two rolling balls and both arriving at the same time on an incline. Maybe someone can explain this. [link] [comments]  |
| Posted: 25 Oct 2020 10:57 AM PDT |
| Posted: 25 Oct 2020 05:53 AM PDT |
| Posted: 25 Oct 2020 07:39 AM PDT Seems like a simple question, right? The wings generate lift, and when you bank, some of that upwards lift gets redirected towards the direction of the turn. But if that was the case, shouldn't the plane just sideslip in the direction of the bank? The rudder would correct for this in a normal plane, but I built a Versa wing a few years back without the wing-rudder-things and it still turned (however poorly), which seems to contradict this explanation. There also seems to be a requirement of some component of "backwards" lift to keep the plane in a turn. Can someone please explain this better? [link] [comments]  |
| Can Covid antigen-tets sensitivity be improved through repeated testing? Posted: 25 Oct 2020 08:40 AM PDT Tests like the Roche SARS-CoV-2 Rapid Antigen test can provide test results within 15 minutes, they don't require any laboratory procedures and in principle could be administered by laypeople. One thing I've been wondering is regarding the test accuracy, more specifically the test sensitivity, which is 96.52% for the said Roche test: Can the sensitivity be quadratically improved by repeatedly testing? Or in other words, will the combined sensitivity of two repeated tests be 1 - (1-96.52%)^2 = 99.88%? I believe one could assume this if the probability of a false negative result would be independent of the patient and just an issue of the actual testing procedure. [link] [comments]  |
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