[video] post cool science stuff

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Re: [video] post cool science stuff
« Reply #60 on: February 02, 2021, 07:01:29 am »
These are crystals... of silver

How was that done?  Silver vapour in a closed container, and they slowly lower the temperature? or, wait, that would turn into silver condensation.  Also a container that hot would probably radiate in the visible spectrum, glowing.

Re: [video] post cool science stuff
« Reply #61 on: February 02, 2021, 10:38:40 am »
These are crystals... of silver

How was that done?  Silver vapour in a closed container, and they slowly lower the temperature? or, wait, that would turn into silver condensation.  Also a container that hot would probably radiate in the visible spectrum, glowing.

The caption from wikipedia says "Silver crystals forming on a copper surface in a silver nitrate solution"

So they are forming in a liquid saturated with silver, similar to how crystals form in caves. To be fair, ice crystals work the same way but we often forget that air is a solution filled with water
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Re: [video] post cool science stuff
« Reply #62 on: March 12, 2021, 03:32:43 pm »
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Re: [video] post cool science stuff
« Reply #63 on: April 20, 2021, 10:06:36 am »
Not a video, but still cool science stuff



A crab and fish hanging out in some water on top of a layer of plerfluroheptane
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Re: [video] post cool science stuff
« Reply #64 on: August 13, 2021, 04:16:08 pm »
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Re: [video] post cool science stuff
« Reply #65 on: October 14, 2021, 07:38:43 pm »
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Re: [video] post cool science stuff
« Reply #66 on: January 25, 2022, 04:34:21 pm »
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Re: [video] post cool science stuff
« Reply #67 on: March 30, 2022, 01:38:24 am »
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Re: [video] post cool science stuff
« Reply #68 on: April 16, 2022, 08:46:57 pm »
it's time for another zefrank video

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Re: [video] post cool science stuff
« Reply #69 on: May 28, 2022, 01:43:22 pm »
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Re: [video] post cool science stuff
« Reply #70 on: June 15, 2022, 11:06:56 pm »
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slime molds are trippy as hell
« Reply #72 on: August 12, 2022, 05:04:44 pm »


Quote
The most familiar strategy of cooperative behavior among such microorganism is attractive chemotaxis. Colonies of the slime mold Dictyostelium discoideum bacteria, when deprived of heat or moisture, start up their cross-talk, this communication allows them to aggregate into multicellular bodies that are more fit survive hardship. Certain cells, called pioneer cells, release pulse of the compound cyclic adenosine monophosphate (cAMP), and nearby cells then follow this chemical trail to its source. Once a cell has emitted a burst of the chemoattractant, it falls silence for several minute, as if recuperating from the exertion. This refractory period means that, when a slime mold colony starts to undergo chemotaxis, it behaves as an excitable medium, then there is no surprise that the slime mold shows target and spiral patterns as BZ retraction.

http://hopf.chem.brandeis.edu/members_content/yanglingfa/pattern/spiral/index.html



https://www.researchgate.net/figure/Aggregation-pattern-of-Dictyostelium-discoideum-in-vivo-a-and-in-a-model-simulation_fig1_235564715





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Re: [video] post cool science stuff
« Reply #73 on: January 08, 2023, 09:57:50 pm »
Frogs living in the Chernobyl exclusion zone have evolved darker skin over the past 30 years since the reactor meltdown. It is hypothesized that these frogs have evolved darker skin because melanin absorbs radiation.

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Re: [video] post cool science stuff
« Reply #74 on: March 12, 2023, 05:09:39 am »
Does this count as AI?
It's artificial. And it's intelligent.

This is like watching a football game play out except it actually holds my interest.
use Foon™