Barx [none/use name]

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Cake day: May 20th, 2024

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  • Barx [none/use name]@hexbear.nettoScience Memes@mander.xyzMandibles
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    10 days ago

    Ohhh. Well the big parts that grab stuff are mandibles. They aren’t legs but they originate, evolutinarily speaking, from legs. Same with antennae! The parts closer to the head do the eating but sometimes mandibles help with that.

    For venomous arthropods sometimes it’s the mandibles that have the venom (like spiders, where they are called Chelicerae), for some it’s saliva and they use various mouthparts (the water bug uses a proboscus), for some it’s their tail end (like ants), etc etc.





  • You need oxidants to live. Issues stemming from oxidants are about levels of free radicals getting too high in the wrong places for too long.

    Getting good sleep, eating a balanced diet, reducing stress, and getting enough exercise are the best ways to reduce the chances of such a scenario. Realistically, these things are also just a way to maximize wellness and health overall and it is probably not very useful for most people to think of this in terms of oxidation.




  • When we and other known organisms take energy from food we are actually taking molecules with higher-energy electrons, converting them into the high-energy molecules our cellular processes can use to do make cell things happen, and producing very similar molecules with lower-energy electrons. Rather than infinitely accumulating these molecules, our cells dump low-energy electrons onto another molecule that is amenable and thereby convert into a molecule ready to accept high-energy molecules from food (with a bunch of steps in between).

    For us, as aerobes, the electron acceptor at the end of respiration is oxygen.

    Oxygen as an electron receptor is newer than several others. Anaerobes came first. It was only after photosynthesis had produced a ton of atmospheric oxygen that it became a viable option, really. But it O2 is a comparatively good electron acceptor because the process in which it accepts those electrons allows cells to grab quite a bit of energy from that last step. It is fairly “electron needy” compared to earlier electron acceptors.

    So, basically, aerobes get more energy per food unit (sugar molecule) than the vast majority of other creatures. You need it to live because it is an essential part of how your cells get food, namely, how it can recycle molecules at the last step of the respiration cycle.


  • Barx [none/use name]@hexbear.nettoScience Memes@mander.xyzOxygen
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    2 months ago

    The dietary antioxidant fad is mostly BS. They’re supposedly meant to counteract oxidative stress and specifically free radicals. Both of those things are part of a healthy life and you would die without them. So any real impact is not so simple as “just counteract those bad things”. Dietary antioxidants don’t always lead to higher intracellular antioxidant levels, either.

    Some dietary antioxidants so lead to higher intracellular levels and may help buffer oxidative stress (like from exercise) but there isn’t much evidence that it doesn’t just boil down to “eating your vegetables is good for you”.


  • As a start, follow the 3-2-1 rule:

    • At least 3 copies of the data.

    • On at least 2 different devices / media.

    • At least 1 offsite backup.

    I would add one more thing: invest in a process for verifying that your backups are working. Like a test system that is occasionally restored to from backups.

    Let’s say what you care about most is photos. You will want to store them locally on a computer somewhere (one copy) and offsite somewhere (second copy). So all you need to do is figure out one more local or offsite location for your third copy. Offsite is probably best but is more expensive. I would encrypt the data and then store on the cloud for my main offsite backup. This way your data is private so it doesn’t matter that it is stored in someone else’s server.

    I am personally a fan of Borg backup because you can do incremental backups with a retention policy (like Macs’ Time Machine), the archive is deduped, and the archive can be encrypted.

    Consider this option:

    1. Your data raw on a server/computer in your home.

    2. An encrypted, deduped archive on that sane computer.

    3. That archive regularly copied to a second device (ideally another medium) and synchronized to a cloud file storage system.

    4. A backup restoration test process that takes the backups and shows that they restores important files, the right number, size, etc.

    If disaster strikes and all your local copies are toast, this strategy ensures you don’t lose important data. Regular restore testing ensures the remote copy is valid. If you have two cloyd copies, you are protected against one of the providers screwing up and removing data without you knowing and fixing it.




  • OWS was not well-organized. Palestinian solidarity groups are doing better. The key difference is in being able to coherently make informed decisions as a group and then act on them as one.

    Every OWS encampment was basically 5-30 orgs all doing their own thing and then fighting about horizontalism and being naive about how the cops and City Hall would treat them. We need to be able to act like 1-3 orgs (even if there are more), politically educate so we can avoid mistakes, and create good structure as early as possible so that expectations are set and time isn’t wasted and bad decisions are avoided.

    The US left is basically slowly relearning the basics of organizing. Get involved and make it go faster!



  • Trump isn’t a fascist. In action he is actually a pretty standard reactionary liberal. You will notice that Biden has continued the salient policies that made liberals call him a fascist, such as extreme and horrible border policies (Dems actually outflanked the GOP on this from the right), anti-China policy, and extending militarism (like maximum pressure on Russia via Ukraine).

    He’s mostly just openly racist whereas the political class usually wraps itself in polite jargon bullshit before it fucks with a bunch of brown people.


  • The main ways you’re exposed to microplastics is through ingestion and breathing it in.

    To limit ingestion, yes the main thing to do is to avoid food and drink that comes in plastic containers. Reducing your consumption of processed foods will help with this. Eating mostly produce is a simpler way to approach this. Even though produce may often be transported in plastic, if you wash it before consumption you’ll have done pretty well. Ideally you would also have a reverse osmosis filter at home, as your water probably has microplastics as well (but less than bottled water!).

    To limit breathing it in, yes avoid frequent exposure to busy roads. They are often full of tire dust that is getting kicked up. This is cumulative, though. Walking by a busy street once is no big deal. Walking along one twice a day may add up.

    Overall, however, to address microplastics we will have to control the production of plastics and the use of plastics in the first place. For example, there would be a lot less tire dust if we used more rail to get around. And there would be less need for bottled water if water fountains were ubiquitous and so were standardized stainless steel water bottles. In addition, we could use biodegradable plastics for more packaging so that they don’t accumulate in bodies or the environment.

    But this last point, despite being the only real solution, will literally require the overthrow of capitalism. I’m for this and am happy to talk about it more, but it is a lot.