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beakers-and-telescopes · 10 months

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OKAY THIS ARTICLE IS SO COOL

I'm going to try to explain this in a comprehensible way, because honestly it's wild to wrap your head around even for me, who has a degree in chemistry. But bear with me.

Okay, so. Solids, right? They are rigid enough to hold their shape, but aside from that they are quite variable. Some solids are hard, others are soft, some are brittle or rubbery or malleable. So what determines these qualities? And what creates the rigid structure that makes a solid a solid? Most people would tell you that it depends on the atoms that make up the solid, and the bonds between those atoms. Rubber is flexible because of the polymers it's made of, steel is strong because of the metallic bonds between its atoms. And this applies to all solids. Or so everybody thought.

A paper published in the journal Nature has discovered that biological materials such as wood, fungi, cotton, hair, and anything else that can respond to the humidity in the environment may be composed of a new class of matter dubbed "hydration solids". That's because the rigidity and solidness of the materials doesn't actually come from the atoms and bonds, but from the water molecules hanging out in between.

So basically, try to imagine a hydration solid as a bunch of balloons taped together to form a giant cube, with the actual balloon part representing the atoms and bonds of the material, and the air filling the balloons as the water in the pores of the solid. What makes this "solid" cube shaped? It's not because of the rubber at all, but the air inside. If you took out all the air from inside the balloons, the structure wouldn't be able to hold its shape.

Ozger Sahin, one of the paper's authors, said

"When we take a walk in the woods, we think of the trees and plants around us as typical solids. This research shows that we should really think of those trees and plants as towers of water holding sugars and proteins in place. It's really water's world."

And the great thing about this discovery (and one of the reasons to support its validity) is that thinking about hydration solids this way makes the math so so so much easier. Before this, if you wanted to calculate how water interacts with organic matter, you would need advanced computer simulations. Now, there are simple equations that you can do in your head. Being able to calculate a material's properties using basic physics principles is a really big deal, because so far we have only been able to do that with gasses (PV=nRT anyone?). Expanding that to a group that encompasses 50-90% of the biological world around us is huge.

#science #stem #science side of tumblr #stemblr #biology #chemistry #scientists #biochemistry #studyblr #physics #nature

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visciously-face-fckd-by-a-cactus · 1 month

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ok. imma do this again because im so sick of this neurotypical label-centric world we live in and the inability that people have to understand individuality, masking, and nuance in presentation of disorders.

edit: this is not meant to exclude all the various neurodivergence diagnoses other than just adhd and autism- this poll was created first and foremost because i was curious about those two in particular, but also because there's not that many button options for the poll itself and if i added more than those variables the permutations would skyrocket

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official-locke-writing · 8 months

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Okay, look, I've been in college for two years and my Biology professor has pretty significantly rooted this educational science game called Labster into her course.

I was not expecting to be playing Portal all day for school.

Yeah, this is a full, 360 sci-fi free roam lab environment that you can pretty much do whatever you want in. You know those cruddy flash game experiments you used to do in middle school? Those are a thing of the past.

And check this: the entire lab is being run by this super cool AI droid named Dr. One

She floats around and directs you around the lab depending on the lesson you're taking and sounds eerily similar to GLaDOS. It turns out that Dr. One also has a lore page and that she was created originally for "unethical purposes."

Also, this environment is extremely detailed and even runs shaders and ambient occlusion in your web browser.

That's pretty nuts, considering the only time we ever see these things are built into genuine video games, not a web browser lab. It runs incredibly smoothly on my GTX 1050.

This is insanely impressive and I actually enjoyed my homework today. 10/10, would play this in my free time.

#gaming #indie games #game development #education #biology #science #science side of tumblr #biochemistry #college #college tips #university #student #studying #college life #student life

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feyosha · 11 days

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Attention Science Enthusiasts and Chem Majors!

Reference for the non-chemists:

Alkaline Metals: putting water on these will set them on fire. Combines explosively with Halogens to produce salts, which are largely impervious to heat.

Halogens: corrosive as fuck. Includes Fluorine and Chlorine. Combines explosively with Alkali Metals to produce salts, which are largely impervious to heat.

Mercury: thanks to Cooper Pairs and Quantum Weirdness, is liquid at room temperature despite being heavy as Lead. Turns Aluminum to mush. Will drive you mad.

Dimethyl Cadmium: 2 methyl’s on a Cadmium! A Metal, directly on Carbon Functional Groups! Carcinogenic, Teratogenic, Neurotoxic, Lipophilic, with both acute and chronic effects, this shit will wreck your cellular machinery like an industrial mining apparatus turned on a neighborhood brownstone.

Azoazide Azide: hello yes I would like to order 14 Nitrogen atoms, but, can they all be exclusively single bonded in a second-order Azide? Whaddya mean it’s the least stable molecule ever fabricated? What do you mean it self-immolates in isolated conditions?

Sand: it's coarse and rough and irritating and it gets everywhere.

[REDACTED]: goo

#feyosha #wizardposting #free range sustainable shitpost #magitechnobabble #arcane jargon #poll #chemistry #science side of tumblr

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todayontumblr · 4 months

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Tuesday, December 26

Do it for the (cell) culture (dish)

We're in the home stretch of the holiday season, folks. The egg nog will soon be taken from us, the wrapping paper is ready to be thrown in the back of the closet, and it is hopefully almost time for you to rest, relax and focus on yourself.

Just like those tiny organisms flourish in their nutrient-rich environment, we too bask in the joys of vegging out, allowing our stress levels to diminish and our spirits to thrive. Just as the cultures in the dish spread and develop, so do our holiday vibes, expanding with each delightful moment of indulgence, whether it's binge-watching favorite shows, savoring festive treats, or simply lounging in comfort. As the Petri dish cultures multiply and evolve, so do our holiday experiences, multiplying into delightful memories that enrich our lives like a blossoming experiment under the microscope of joyous moments.

Enough heavy-handed metaphors and similes. Let's get on with it.

#today on tumblr #petri dish #petri dish art #agar dish #biology #science #science side of tumblr

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captainadwen · 11 months

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Hi tumblr I'm sharing a tiny frog my mom found with you

I really cannot emphasize how tiny it is

It's SO SMALL

#tiny frog #or tiny toad #frogs #toads #science side of tumblr #identify it for me pls hahaah #it may be nobles pygmy frog but... might be wrong area / altitute?#frog side of tumblr #anyway i hope this makes people happy i love my tiny toad house guest

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learnyouabiology · 11 months

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Fun Fact: Hognose snakes are dramatic lil guys!

I am particularly fond of the snakes known as hognose snakes, and my reasons are both understandable and correct.

This is a hognose snake:

(They received their name by having the sweetest lil snoot to ever require a boop – image source)

They use these adorable snoots to burrow under sandy soil using a sort of nuzzle-y motion. They then use these burrows as a place to sleep at night, hibernate in the winter, and lay their eggs.

(you could say they’re into... the Underground Scene! ...ok yeah i’ll show myself out – image source)

Plus, they come in a variety of delightful colours!

We've got brown! Beige! Yellow! Black! Red! Orange! Tan! Kinda greenish! Orange again!

(pretty sneks! – Here’s all the image sources: 1, 2, 3, 4, 5, 6, 7, 8, 9)

And, to be clear, the snakes pictured above are wild snakes. No selective breeding by humans in these noodly bois! At least, not in these specific individuals. probably. I guess a few of them could be escapees...

But most importantly: These snakes know the true meaning of DRAMA

Hognose snakes are actors, first and foremost. When they feel threatened, the first thing they do is puff out their neck into a hood.

(like cobras, this hood is made by FLEXING THEIR NECK RIBS. which: gross – image source x)

This superficially makes them look like a cobra, but what they’re actually trying to do is make themselves seem bigger, and therefore scarier. Possibly those dark spots on their neck helps with that!

Any resemblance to real-life Eurasian cobras, real or fictional, is purely coincidental

Also, it makes its mouth do this:

(Snakes that SCREAAAAAAAM. – image source)

honestly, if I didn’t already know that hognose snakes were harmless, this would ABSOLUTELY make me leave it the hell alone

But if all of that^ is unsuccessful at scaring away the predator, the hognose snake pulls its signature move: playing dead

If you think that is a lame signature move, then you are wrong, because hognose snakes put EVERYTHING into their performance and I love them for it.

(they’re serious, they’ll do it! – image source)

((I’m actually going to stick the rest of this under a read-more, bc the pictures of the alive-and-physically-fine hognose snakes do kind of look like a legitimately-dead hognose snake, if you don’t know what to look for.

So, uh: cw for a snake being too good at pretending to be dead))

Behold: a series of completely healthy, unharmed snakes!!!

(to help with their self-esteem, we ask that you at least pretend to believe that they are dead – image sources 1, 2, 3, 4)

Honestly, the photos don’t do it justice. Here’s my favourite video of the whole wonderous performance:

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But to review:

There's writhing! There's dramatic noises! There's flipping onto their back and opening their mouth wide and letting their tongue hang out! There's excreting a combination of intentionally smelly substances!!! Truly a master of the art of being left the hell alone (*^▽^*)

(yep. deeeeefinitely dead. not just faking it. nothing worth eating here! – image source)

Personally, my favourite part of this is how they insist on rolling onto their back, even when they are rolled back onto their stomach.

Seriously, if you try to roll them right-side-up, they will flip back over. It's as though they believe that a good, proper dead snek MUST be on its back, obviously.

(truly fearsome – image source)

Sadly, the hognose snake may have made itself too scary, according to humans.

Out of fear, these snakes are commonly killed on sight 😔. I once heard someone proudly brag about how they’d killed a dozen cobras! In southern Ontario! Where cobras do not live! This is both extremely frustrating and deeply sad.

(safe enough to hold! although maybe don’t, just because this snake IS probably experiencing mortal fear, which is not a good feeling – image source © Dean Stavrides)

So just to highlight: hognose snakes are completely harmless. They’re just pretending to be fearsome!

(not that people should be killing venomous snakes either, imo. Let the danger noodles LIVE THEIR LIVES)

(i is baybee, pls do not hurt me – image source)

And now some bonus facts to help raise us out of that downer:

Hognose snakes are toad specialists! Their favourite food is toads, which is unusual, because toads are poisonous. Hognose snakes deal with this by force of will and also, at least two amino acid substitutions, maybe (Mohammadi et al. 2016). Possibly a few other things help with this, also (Feldman et al. 2016).

(is snek eat toad? or does toad wearing cape of snek? impossible to tell, really – image source)

Also, I have a confession: hognose snakes... are venomous. Technically.

(itty bitty little fangs at the veeeeery back of their mouth! – image source)

They are known as rear-fanged snakes, which means they have fangs aaaall the way at the back of their mouth. The venom they produce seems to be toad-specific, and is considered to be harmless to humans unless you happen to have an allergy but that's the exception rather than the rule

(the two hognose species. They are both baybee, but in different ways actually there might be more than two species but these are the two i’ve actually learned about so ALL WELL – image source)

Also, hognose snakes are big cowards NOT aggressive and I've never even heard of anyone getting bit by a one (outside of one feeding mishap, which we can all agree was an ACCIDENT).

The series of events that would need to occur for you to be envenomated are so unlikely and bizarre that I assume you would have to be TRYING to get bit.

This has been Fun Fact Friday, bringing you the forbidden noodly boys to try and keep them a little more safe!

.....................................................................

Sources, because I know me and SO DO YOU:

Averill-Murray, R. C. (2006). Natural history of the western hog-nosed snake (Heterodon nasicus) with notes on envenomation. Sonoran Herpetologist, 19(9), 98-101.

Buchanan, Scott W.; Timm, Brad C.; Cook, Robert P.; Couse, Richard; Hazard, Lisa C. (2017). Spatial ecology and habitat selection of eastern hognose snakes. The Journal of Wildlife Management, 81(3), 509–520. doi:10.1002/jwmg.21218

CHS: Canadian Herpetological Society https://canadianherpetology.ca/species/species_page.html?cname=Eastern%20Hog-nosed%20Snake

COSEWIC. 2021. COSEWIC assessment and status report on the Eastern Hog-nosed Snake Heterodon platirhinos in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. xi + 45 pp. https://www.canada.ca/en/environment-climate-change/services/species-risk-public-registry/cosewic-assessments-status-reports/eastern-hog-nosed-snake-2021.html

Cunnington, G. M., & Cebek, J. E. (2005). Mating and nesting behavior of the eastern hognose snake (Heterodon platirhinos) in the northern portion of its range. The American midland naturalist, 154(2), 474-478.

Feldman, C. R., Durso, A. M., Hanifin, C. T., Pfrender, M. E., Ducey, P. K., Stokes, A. N., ... & Brodie Jr, E. D. (2016). Is there more than one way to skin a newt? Convergent toxin resistance in snakes is not due to a common genetic mechanism. Heredity, 116(1), 84-91.

Jared, C., Luiz Mailho‐Fontana, P., & Maria Antoniazzi, M. (2021). Differences between poison and venom: An attempt at an integrative biological approach. Acta Zoologica, 102(4), 337-350.

Liu, C., Chen, Y., Zheng, Y., Bo, J., Yang, C., Xu, S., & Zhang, S. (2022). Wear Resistance Improvement of Keeled Structure and Overlapped Distribution of Snake Scales. Journal of Bionic Engineering, 1-11. Citing abstract.

Mohammadi, S., Gompert, Z., Gonzalez, J., Takeuchi, H., Mori, A., & Savitzky, A. H. (2016). Toxin-resistant isoforms of Na+/K+-ATPase in snakes do not closely track dietary specialization on toads. Proceedings of the Royal Society B: Biological Sciences, 283(1842), 20162111.

Nature Conservancy of Canada: https://www.natureconservancy.ca/en/what-we-do/resource-centre/featured-species/reptiles-and-amphibians/eastern-hog-nosed-snake.html

Plummer, M. V., & Mills, N. E. (1996). Observations on trailing and mating behaviors in hognose snakes (Heterodon platirhinos). Journal of Herpetology, 30(1), 80-82.

Rouse, Jeremy D.; Willson, Robert J.; Black, Ron; Brooks, Ronald J. (2011). Movement and Spatial Dispersion of Sistrurus catenatus and Heterodon platirhinos: Implications for Interactions with Roads. Copeia, 2011(3), 443–456. doi:10.1643/ce-09-036

Seburn, D. 2008. Recovery Strategy for the Eastern Hog-nosed Snake (Heterodon platirhinos) in Canada. Species at Risk Act Recovery Strategy Series. Parks Canada Agency, Ottawa. vi + 24pp.

Schwartz, V. & D. Golden (2002). Field Guide to Reptiles and Amphibians of New Jersey. New Jersey Division of Fish and Wildlife

VHS: Virginia herpetological society http://www.virginiaherpetologicalsociety.com/reptiles/snakes/eastern-hog-nosed-snake/eastern_hognose_snake.php#:~:text=Heterodon%20is%20derived%20from%20the%20Greek%20words%20heteros,meaning%20%22broad%20or%20flat%22%20and%20rhinos%20meaning%20%22snout%22

Young, R. A. (1992). Effects of Duvernoy's gland secretions from the eastern hognose snake, Heterodon platirhinos, on smooth muscle and neuromuscular junction. Toxicon, 30(7), 775-779. https://doi.org/10.1016/0041-0101(92)90013-U

Young, B. A., & Morain, M. (2003). Vertical burrowing in the Saharan sand vipers (Cerastes). Copeia, 2003(1), 131-137.

SARA: threatened https://www.canada.ca/en/environment-climate-change/services/species-risk-public-registry.html

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casual-eumetazoa · 1 year

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a post-doc was doing a guest seminar at my institute and at the beginning of his presentation he was explaining why he chose birds for his evolutionary analysis - so he said "well first of all, because birds are the best and most interesting animals and it's fun to study them" and a few professors in the room gave him a very serious nod

#sciblr #stem #biology #science side of tumblr

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the-untalented-photographer · 1 year

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beakers-and-telescopes · 9 months

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Slime Molds and Intelligence

Okay, despite going into a biology related field, I only just learned about slime molds, and hang on, because it gets WILD.

This guy in the picture is called Physarum polycephalum, one of the more commonly studied types of slime mold. It was originally thought to be a fungus, though we now know it to actually be a type of protist (a sort of catch-all group for any eukaryotic organism that isn't a plant, animal, or a fungus). As protists go, it's pretty smart. It is very good at finding the most efficient way to get to a food source, or multiple food sources. In fact, placing a slime mold on a map with food sources at all of the major cities can give a pretty good idea of an efficient transportation system. Here is a slime mold growing over a map of Tokyo compared to the actual Tokyo railway system:

Pretty good, right? Though they don't have eyes, ears, or noses, the slime molds are able to sense objects at a distance kind of like a spider using tiny differences in tension and vibrations to sense a fly caught in its web. Instead of a spiderweb, though, this organism relies on proteins called TRP channels. The slime mold can then make decisions about where it wants to grow. In one experiment, a slime mold was put in a petri dish with one glass disk on one side and 3 glass disks on the other side. Even though the disks weren't a food source, the slime mold chose to grow towards and investigate the side with 3 disks over 70% of the time.

Even more impressive is that these organisms have some sense of time. If you blow cold air on them every hour on the hour, they'll start to shrink away in anticipation when before the air hits after only 3 hours.

Now, I hear you say, this is cool and all, but like, I can do all those things too. The slime mold isn't special...

To which I would like to point out that you have a significant advantage over the slime mold, seeing as you have a brain.

Yeah, these protists can accomplish all of the things I just talked about, and they just... don't have any sort of neural architecture whatsoever? They don't even have brain cells, let alone the structures that should allow them to process sensory information and make decisions because of it. Nothing that should give them a sense of time. Scientists literally have no idea how this thing is able to "think'. But however it does, it is sure to be a form of cognition that is completely and utterly different from anything that we're familiar with.

#science #stem #science side of tumblr #stemblr #biology #biochemistry #neurology #slime mold

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