Was cleaning my room when I found this
Why did this turn purple/pink in colour?
>>27948846
With the cap closed, the original organisms in the container consumed all the oxygen and died. This created the perfect conditions for sulfur bacteria, which are anaerobic.
https://en.wikipedia.org/wiki/Purple_sulfur_bacteria
>>27948910
Thanks, I tried Googling "milk turned pink" and stuff to try and figure it out but nothing came up.
>sulfur
Isn't that bad to breathe in? I'm glad I didn't open it
>>27948931
Not dangerous, but it would smell like rotten eggs. Ever noticed the rotten eggs smell in swamps? It's caused by the same anaerobic bacteria; swamp water has low oxygen content.
>>27948956
Cool
You're pretty knowledgeable
I found this one too and it expired over a month before the last one, how come it turned this colour instead? Both caps were closed completely though obviously this one is bigger. Different brand too
>>27949001
Ever made sourdough bread? You mix up some flour and water, then just leave it out for a few days, waiting for it to be colonized by wild yeast floating around in the air. Usually it turns frothy and smells like beer, which indicates a healthy, happy swarm of yeast has taken residence. But occasionally it turns slimy and sour instead, and this is because yeasts are constantly at war with molds, and sometimes the mold wins. When yeasts conquer the molds, they begin changing the PH balance to make it unfriendly to molds; but if the molds get the upper hand, they release toxins which poison the yeasts. Likewise, while all this is going on, bacteria are also waging war with each other. Yeast and lactobacillus get along with each other very well, so if the yeast win their war with the molds, they create an environment which kills all the other bacteria except the lactobacillus, and in fact it's the lactobacillus which gives sourdough bread its characteristic tanginess.
In your sealed milk jug, a complex battle for dominance is going on. As these organisms fight and consume resources, they alter the chemicals present, which influences which organisms thrive and which die off. In the first container, the purple sulfur bacteria ended up winning the war, but there's no guarantee they'll win every battle. Obviously something else won the war in the second container.
>>27948910
>>27948956
Please post more and teach us more things
>>27949098
>tfw actually read it all
You're pretty good at explaining things in a simple but interesting way to idiots
Your posts made me happy
>>27949170
I like it when people show primate curiosity. It's one of the best traits of humanity. I'll share what I know all day when someone shows honest curiosity with something. There really is no such thing as a stupid question.
>>27949208
>there really is no such thing as a stupid question
remember where you are
>>27949208
Do you like boys?
Are you single?
>>27949304
Asexual and aromatic, I'm afraid. So yes, I'm single.
>>27949098
Just like the war between the normies and robots. Robots colonized r9k and made it a toxic place for normies.
Normies colonized the real world and it is toxic to robots... so toxic that it triggers a suicide mechanism in the robots.
>>27948846
>reduced fat
>reduced
>red
>>27948910
>>27948956
>>27949098
Anon-kun you're so smart!
>>27948910
>Microbiofag here
>A thousand internets to you, Anon
Cool post, OP.
>>27948910
>>27948931
>>27948956
>>27949001
>>27949098
>>27949101
>>27949170
>>27949208
>>27949271
>>27949304
>>27949321
>>27949926
>>27949938
>>27951095
>>27951203
All this samefagging. You aren't fooling anyone.
>>27951281
All this shitposting. You aren't fooling anyone.
Rekt. Seriously, why do people samefag this hard? It does noone anything.
>>27948846
Reminds me of the time I left some oranges out and they turned fucking PURPLE.
If I cook ground beef / beef mince after it's been sitting in my fridge for 2 days, will I get sick?
>>27951423
Use your senses, if it smells off or looks slimy, then toss it.
Then if you do cook it, make sure you cook it all the way through, and thoroughly.
>>27951399
>>27951423
>>27951454
Just checking desuu
>>27951505
Even cooking something thoroughly doesn't guarantee it's safe. Bacteria release toxins to help inhibit the growth of competing organisms, so even if you kill the listeria with heat, for example, you can still get very sick from their waste products. Not saying your meat is contaminated, but it's reason to be cautious of suspect meat.
>>27949098
>ever made sourdough bread?
I have a feeling this guy is making alot of sour shit in his fridge
