I developed seasonal allergies when I was 33. How does my body decide that things it has encountered for decades are now hostile? |
- I developed seasonal allergies when I was 33. How does my body decide that things it has encountered for decades are now hostile?
- What happens in our brain when we stutter?
- Can any microbes (yeast, bacteria etc) make/synthesize lactose?
- MedicineWhat affect does the quantity of injuries have on healing time? For example, would a paper cut take longer to heal if I had a broken Jaw at the same time?
- What was Earth like in the 1000 years after the K-T extinction event?
- What chemical reaction is happening when dry hopping a beer?
- Why does protein from crustaceans look so different than land meat?
- Why are the ice caps of Mars so different in size?
- Can ampicillin agar plates be stored at -20C?
- Can S. aureus be slide coagulase negative?
- What would the “anti-Pangea,” where continents are as far from another as possible, look like?
- Why are ionization energies so much larger than electron affinities?
- How are gas prices set?
- How does fire spread?
- Do we have any systems in which other planets rotate around a giant planet instead of a star?
| Posted: 06 Mar 2022 06:59 AM PST |
| What happens in our brain when we stutter? Posted: 06 Mar 2022 09:51 AM PST |
| Can any microbes (yeast, bacteria etc) make/synthesize lactose? Posted: 06 Mar 2022 08:38 AM PST Trying to Google just returns a lot about lactose intolerance. I'm interested in whether it would be possible to make dairy-free lactose so you could make "real" plant-based cheese/yogurt via the normal lactose-requiring fermentation processes. Thanks! [link] [comments] |
| Posted: 05 Mar 2022 11:47 PM PST |
| What was Earth like in the 1000 years after the K-T extinction event? Posted: 05 Mar 2022 12:50 PM PST I'm curious about what the recovery of life looked like in the immediate (in geological terms) aftermath of the Chicxulub asteroid impact. Pop science says that in the following few years or decades, the ash clouds blocked out the sun and photosynthetic life more or less stopped. What did the small burrowing animals that did survive eat during this time to, well, survive? (If fungi: did fungi grow to Devonian-era sizes?) What happened when the ash cover dissipated? What would the landscape look like and what sorts of animals and plants would have covered it? Evolution isn't a fast process, but with so many biological niches open, how quickly would it take to see physiological differences between new species? [link] [comments] |
| What chemical reaction is happening when dry hopping a beer? Posted: 06 Mar 2022 08:50 AM PST When you dump hops into an active fermentor, also know as dry hopping, sometimes the addition of the hops will vigorously force co2 out of the fermenting wort. Why does this happen? [link] [comments] |
| Why does protein from crustaceans look so different than land meat? Posted: 05 Mar 2022 06:02 PM PST |
| Why are the ice caps of Mars so different in size? Posted: 05 Mar 2022 04:24 PM PST |
| Can ampicillin agar plates be stored at -20C? Posted: 05 Mar 2022 07:39 PM PST We don't clone often in my lab, and I end up making an entire sleeve of amp agar plates and only using like three, and the rest sit in the fridge for over a month and then are not good anymore. Would be great if I could freeze the sleeve of plates for later use? [link] [comments] |
| Can S. aureus be slide coagulase negative? Posted: 05 Mar 2022 11:34 PM PST |
| What would the “anti-Pangea,” where continents are as far from another as possible, look like? Posted: 05 Mar 2022 05:59 PM PST Everybody knows about true supercontinents, where nearly all landmasses are contiguous. What would the planet look like with all landmass as spread out as possible? What would the map look like? There would be much less elevation from mountains and such, so would the sea level be higher as land actually takes up more space? How much higher? Would there be reduced access to freshwater? [link] [comments] |
| Why are ionization energies so much larger than electron affinities? Posted: 05 Mar 2022 02:44 PM PST As I understand it, the ionization energy is the energy required to take an electron away, off of an atom. Electron affinity, on the other hand is kind of the opposite, as it's the amount of energy given off when an electron is given to an atom. As such, I thought they'd be similar in terms of value. I've been looking at charts of electron affinity and first ionization energies, and it seems that that's not the case, however. For example, hydrogen has an ionization energy of 1312 kJ/mol... but an electron affinity of only 73 kJ/mol. What's up with that? The electron affinity is less than a tenth of the ionization energy. Both values deal in putting/removing an electron around the hydrogen atom... why does the change in energy vary so much? This doesn't seem to just be hydrogen, either, as even the lowest first ionization energy (Fr, ~380 kJ/mol) is larger than the largest electron affinity (Cl ~349 kJ/mol). I've been trying to understand this and in looking further I've only gotten more confused by looking at standard enthalpy of formation too... If I want to make a mole of NaCl, I'd have to take a mole of Na, and a mole of Cl, and move the electron from every Na atom to a Cl one, right? So that's 496 kJ/mol to take the electrons off of Na, and 349 kJ/mol back when I give them to Cl, so I guessed that this whole process should take 147 kJ. But the standard enthalpy of formation of NaCl is about -411 kJ/mol, which means its an exothermic reaction. Where is this additional ~558 kJ/mol coming from? Apologies if my understanding of these concepts is wrong... but could someone possibly explain why it is this way? [link] [comments] |
| Posted: 05 Mar 2022 05:31 PM PST While I understand that economic forces determine prices (supply, demand, etc.), do the effects of war truly change supply so dramatically that prices would change so quickly? I feel like prices have to be the product of speculation at some point. [link] [comments] |
| Posted: 05 Mar 2022 02:27 PM PST |
| Do we have any systems in which other planets rotate around a giant planet instead of a star? Posted: 04 Mar 2022 08:00 PM PST Like something with star-level mass but not out of material that can react in a fusion reaction under that much gravity. If no, then why not? [link] [comments] |
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