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Cake day: July 2nd, 2023

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  • The_v@lemmy.worldtoScience Memes@mander.xyzimagine
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    16 hours ago

    Stop your bullshit.

    Not only are they fertile, it is standard protocol to purchase competitors hybrid F1 seed and produce F2 seed in most species (except corn). Eventually plant breeders create inbreds (self-pollinating for 6+ generation’s). These inbreds are the used to make new F1 hybrids. In Europe this is referred to as “plant breeders rights”.

    In corn they have to get a little bit more creative. Corn breeders have to keep distinct genetically distant breeding pools to maintain heterosis in their the resulting hybrids. They pull traits from a competitors hybrid utilizing backcross breeding into their breeding pools.



  • The_v@lemmy.worldtoScience Memes@mander.xyzimagine
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    1 day ago

    Where the fuck do people come up with this shit?

    No the “vast majority” of crops are not infertile. They are hybrids. Farmers buy the seeds because of a genetic phenomenon called heterosis AKA hybrid vigor. It takes expertise and a shit ton of money to make hybrid seed. If growers could get the same performance from saving their own seeds only an absolute dumbfuck would buy seeds from a seed company.

    Now there are a few species that hybrids can only be made by taking advantage of mutants that have male sterility genes. The resulting hybrids are still fertile (produce viable female gametes) but need an outside source of pollen. Examples: onions, sunflowers and carrots.

    The only “sterile” seed sold is seedless watermelon aka triploid seed. Seedless watermelons are only sold because the market demands it thanks to a push by the USDA after being created in Japan pre-WW2. The margins on seedless watermelon seed are often 40-50% less than hybrid diploid seed. And don’t get me started on the research cost - 14-15 generations for a new female line versus 7-8 for seeded types.


  • The_v@lemmy.worldtoScience Memes@mander.xyzimagine
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    1 day ago

    Not even close.

    Seedless watermelons are a triploid. These are hybrid between a tetraploid female and a diplod male. The plant has three copies of every chromosome and is unable to produce fertile gametes aka completely sterile.

    Fruit formation is triggered by fertile diploid pollen (planted in the field In a 4:1 ratio). The fruit then continues to grow without embryo formation in the fruit seeds (pips).


  • The_v@lemmy.worldtoScience Memes@mander.xyzimagine
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    1 day ago

    Saving seed for the farms own use is expressly allowed under plant variety protection and patent laws in the U.S.

    This is why the seed companies created contracts that they require all growers to sign before being allowed to purchase GMO crops. The prohibition from saving seed is from the signed agreement not from the patent or PVP.

    Say if you got grain from the farmer for your bird feeder. Then if you happen to use the grain as seed to plant some for next year’s bird feeder — completely legal. You are not bound by the agreement between the farmer/seed company. Unless you try to sell the grain/seed to another person. Then you are in violation of the seed companies patent in the U.S.

    Remember that corn shows a severe amount of inbreeding depression. So the F2 plant will not produce as much as the farmers F1 did the year before.



  • Had to do some research into what the hell that was. It’s and adaption of a domestically produced weapon in Ukraine. And holy fuck it’s effective.

    In 2017 Ukroboronprom’s Scientific Research Institute for Chemical Products in conjunction with Artem State Enterprise [uk] (aka Artem Holding Company) announced to the market its new product, the RGT-27S [uk]. These can be combined with the RPV-16 [uk] grenade launcher, a demonstration of which was witnessed by Oleksandr Turchynov. The grenades, of approximately 600 grams, “create a two second fire cloud with a volume of not less than 13 m³, inside of which the temperature reaches 2,500 degrees[clarification needed]. This temperature allows not only for the destruction of the enemy, but are also able to disable lightly armored vehicles.”[71][72] The firm showed them at the Azerbaijan International Defense Exhibition in 2018.[73]

    https://en.m.wikipedia.org/wiki/Thermobaric_weapon





  • Hmmm… I think this might be a adaption to constant drone surveillance.

    Supply vehicles are a major target for drones and artillery. They also leave tracks in the mud/snow that can easily be seen from the air. This gives the drone operators a fast way of locating where to search for enemy positions even if they miss the truck. The fresh tracks give them a region to search.

    Now if they drop the supplies 5-10 miles from the positions and use donkeys to haul it to the final position using treelines etc the tracks will be very hard to follow. It would take a IR camera drone and a bit of luck to spot them.


  • People require different amounts of repetition to remember something in long term memory. The average is 8-10 repetitions if I recall correctly. What we define as gifted is really a lower required number of repetitions. Photographic memory is very rare but it only requires 1 repetition. Most “gifted students” require 2-4 repetitions to recall it. Students that struggle can require 30+ repetitions to recall the information. Some of the learning impaired can have 1000+ repetitions and never learn it.

    What’s fascinating to me is that somebody can be a low repetition in some areas but high repetition in others. For example, a person can have a high ability to remember imagery but struggle with names and language.

    To add in more complexity, short term memory varies as well. Some people have an exceptionally strong short term memory. These people excel at the study and forget it method. Give them a long sequence to remember for a short while like the old Simon game and they win everytime. Other people struggle to recall a sequence longer than 3 or 4.

    Now what your friend is describing is the ability to process information. This is referred to sometimes as critical thinking. Just like memory this varies greatly by individual it also varies by age. Most people don’t start to develop the skill until their mid-20’s if they ever do. A large percentage of the population never develops this ability. Unfortunately this skill also commonly degrades as you get older.

    FYI microeconomics is basically a little bit of vocabulary and critical thinking. Most of the text books could really be a pamphlet if they got rid of all the fluff.



  • It is likely bacterial growth. The inoculum most likely is coming in the water source. Although bacterial growth is inhibited by water treatment, there is always some there. It could also just be floating around in the air on dust particles. These bacteria a tough and ubiquitous in nature.

    What likely happened - you had several competing species growing in the solution. Most were likely unicellular while this one likes to form a colony. It’s likely in the same group that forms the dreaded white films on the top on aquariums. When you sterilized eveything, you eliminated the competition and this species was able to grow larger and faster.

    So what to do - I personally would run it though a blender to break up the floaters before using it and otherwise ignore it. It doesn’t harm anything so why fight it?





  • I do love seeing that one mocked.

    For those that don’t know the original painting is from a Mormon artist Del Parson. It’s part of his “Red Robe Scandinavian Jesus.” series.

    Mormons were extremely racist theocratic socialist until the anti-communist era of the 1950’s and 60’s. Since then they have pivoted to being extremely anti-socialist as prosperity doctrine has risen, but the racist roots are still going strong.