When you have antibodies for COVID, do repeated exposures to sources of the virus "refresh" the timer on your immunity? |
- When you have antibodies for COVID, do repeated exposures to sources of the virus "refresh" the timer on your immunity?
- Why are the engineers at SpaceX designing the landing of Starship to be vertical instead of a plane-like landing like the space shuttle?
- Can small cuts lead to cancer?
- Are people with aphantasia less effected by PTSD?
- Why do some rivers flow away from the equator?
- Why does the addition of a methyl group to an amine tend to make drugs stronger?
- How risky is surface transmission of COVID-19?
- When we drill for oil is all oil the same, or are there different kinds?
| Posted: 05 Mar 2021 04:41 PM PST |
| Posted: 05 Mar 2021 01:19 PM PST It seems a lot harder to land a rocket vertically after re-entry rather than giving it a shallow decent angle and landing it line a plane/ the space shuttle would to some degree? Thanks [link] [comments]  |
| Can small cuts lead to cancer? Posted: 05 Mar 2021 02:26 PM PST Knowing that cancer cells carry mutant genes, some mutations occur during cell division and that cell division has a crucial role in repairing tissues / wound healing. [link] [comments]  |
| Are people with aphantasia less effected by PTSD? Posted: 05 Mar 2021 01:39 PM PST From my limited understanding, aphantasia sufferers are incapable of picturing images in their head, be it a memory or a fantasy, they just can't do it. So if PTSD sufferers suffer from "flashbacks" to their traumatic event, would somebody with aphantasia just not experience that? [link] [comments]  |
| Why do some rivers flow away from the equator? Posted: 05 Mar 2021 08:14 PM PST Most rivers flow towards the equator, but some don't. Why? [link] [comments]  |
| Why does the addition of a methyl group to an amine tend to make drugs stronger? Posted: 05 Mar 2021 05:41 PM PST Forgive me if this isn't allowed, but essentially what the title says. Why are methylated drugs generally stronger than their unmethylated counter parts? E.g. Amphetamine vs Methamphetamine, Cathinone vs Methcathinone or Tryptamine vs Dimethyltryptamine. [link] [comments]  |
| How risky is surface transmission of COVID-19? Posted: 05 Mar 2021 05:18 PM PST At the beginning of the pandemic, I remember an oft-cited study that showed the coronavirus surviving on surfaces for a number of days. If I remember correctly, non-porous surfaces, such as metals and plastics, were worse. In the meantime, I remember reading about a study where it survived on a smartphone for a month, but I think that was under quite rigorous lab conditions. What is the current consensus: * Does coronavirus survive for extended periods (days/weeks) on various household surfaces? * If it does, how much of a risk of transmission does it actually present? (That is, presuming one doesn't increase personal hygiene beyond what would be considered normal.) [link] [comments]  |
| When we drill for oil is all oil the same, or are there different kinds? Posted: 05 Mar 2021 06:08 PM PST I mean right when it comes from the ground, does it all have the same composition and is the same? Or are there differences between different pockets of oil? [link] [comments]  |
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