girnigoe

girnigoe t1_j6drk51 wrote

oh, cannes food going bad after it’s opened is not botulism, any more than a salad going bad in the fridge. that’s other processes & organisms.

botulism grows in NON-ACIDIC, ANOXIC environments. so it can grow inside the can (no oxygen), before the can is opened. industrial canning processes get very very hot to kill the spores so they don’t grow even when the environment is right.

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girnigoe t1_j6bdafy wrote

I wanted to say something similar but wondered… COULD you actually do a corundum-to-blue-sapphire or quartz-to-amethyst gradient, by growing the gem in a lab & gradually adding the doping (“dirty”) element?

I see your edit & yeah this isn’t melting, but does OP really care about the specific process!?

and a lab-grown gem would still be…clear & sparkly like a gemstone. the resin suggestions kill the whole thing imo

edit: similar to u/highfructosetrashjuice’s comment in the thread.

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girnigoe t1_j6bbxui wrote

yes! acidity is also the reason that botulism isn’t SO likely in fruit jams, but more likely to be a problem in canned meat.

what i didn’t understand about infant botulism for a long time is: for adults the SPORES aren’t a problem, because they die in your gut. the toxins left over that the bacteria created (pooped out?) while living in the nonacidic canned food is what makes us very sick. for BABIES the problem is the spores can literally create more bacteria in their tummies / intestines, & hang out there eating food & making toxin

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girnigoe t1_irotsi6 wrote

So there are 3 things that cause eye color:

  • brown from melanin
  • yellowish from lipochrome
  • blue from how light gets scattered in the iris (similar to how light gets scattered in the sky)

You can’t have yellow eyes because the light scattering always happens.

1 You can have light brown eyes or dark brown eyes, w more or less melanin. The brown covers up the blue so it just looks brown.

2 You can have yellow + blue, so green eyes.

3 You can have different amounts of brown pigment in different parts of the iris (usually more brown at the outside), which is called hazel.

4 Or you can have very little pigment & the light scattering gives you blue.

I think there are some not-commonly-done & risky surgeries to inject different pigment…

or you can wear colored contacts for more colors :)

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