Hier ist noch ein Artikel, den manche schon kennen.
Er bestätigt den bereits genannten und vertieft manche Punkte noch.
Das genannte Rinderserum wird übrigens aus sich wehrenden, vor Schmerzen brüllenden lebendigen Kälbern entnommen, was pure Tierquälerei ist. Das fehlt mir noch in dem Text, der ansonsten sehr deutlich ins Detail geht.
"The 'Clean Meat' Industry Has a Dirty Little Secret....
reliant on unappetizing additives ....
Many companies use antibiotics, hormones, even blood products taken from fetal calves, at least during the first steps of the process, to get initial batches of cells to transition from life inside an animal to life inside a vial or dish. Industry surveys discussed by the board suggest that so far, most production systems also require artificial or animal-based additives to keep the cells growing....
not yet clear how muscle cells will react when they’re grown in huge bioreactors. Unhappy cells may pump out stress-related compounds that humans may not want to eat. And without perfect sterility — or doses of antimicrobials — those massive vats, warmed and filled with nutritious broth to encourage growth, might get invaded by bacteria and fungi....
tissue sample will likely need dosing with antibiotics to kill off what was growing in or on the animal, plus enzymes to liberate the muscle and/or fat cells so they can be separated from other types of cells....
Next, select out the cells capable of dividing and maturing into muscle or fat. You might genetically engineer them or otherwise manipulate them to become immortal, creating a renewable seed stock....
Now put some of these cells into cell culture with a mix of growth factors, hormones, and nutrients to help them divide and mature into muscle. Many manufacturers use fetal bovine serum (FBS), which is collected at slaughterhouses from the blood of fetal calves....
No company can afford to scale up production relying on this expensive animal-based elixir, so developing affordable plant-based FBS replacements is an area of intensive R&D. What’s in those formulas is usually kept secret — but they typically include hormones and cytokines, another type of signaling molecule....
The cells may also need scaffolding to attach to — another area of competition and rapid change. It could be collagen or gelatin derived from animals or generated by genetically-engineered microbes.
.... what’s in your vat at this point isn’t just animal cells. It’s a mix of natural, artificial, and plant- and animal-based materials. If it all works properly, and you keep microbial invaders out, you wind up with something similar to ground beef, chicken, fish, or pork....
critics’ top worry: invasion by pathogens like listeria or mycoplasma.
'Anybody who has worked with cell culture knows that even in a very sterile environment, cross-contamination issues can be a real problem,' said Rhonda Miller, a meat scientist at Texas A&M. 'As we upscale this technology, there are a lot of things we don’t know about how to control' that problem....
The shadow of genetically modified food hangs over meat made in vats. More than a third of U.S. consumers think GMOs are unhealthy....
people learned in 2012 that hamburgers often contain a byproduct called lean finely textured beef — what was dubbed pink slime ....
Some producers are already backing away from the “clean meat” label, preferring to call their offerings “cell-based meat” instead....
https://medium.com/neodotlife/the-clean-meat-...
