Pinboard (jm)
https://pinboard.in/u:jm/public/
recent bookmarks from jmMicroplastics found to increase risk of serious outcomes for heart patients2024-03-07T17:33:15+00:00
https://erictopol.substack.com/p/theres-plastic-in-my-plaque?publication_id=587835&post_id=142359342&triggerShare=true&isFreemail=true&r=3awpb&triedRedirect=true
jmmicroplastics plastic sustainability health medicine atherosclerosis papers via:eric-topolhttps://pinboard.in/https://pinboard.in/u:jm/b:1053c53daef5/Mutant enzyme could vastly improve recycling of plastic bottles2020-04-10T09:49:07+00:00
https://www.sciencemag.org/news/2020/04/huge-step-forward-mutant-enzyme-could-vastly-improve-recycling-plastic-bottles
jmThey isolated a mutant enzyme that’s 10,000 times more efficient at PET bond breaking than the native LLC. It also works without breaking down at 72°C, close to the temperature at which PET becomes molten.
In a small reactor designed to test the enzyme, the team found that it could break down 90% of 200 grams of PET in 10 hours. The researchers then used the terephthalate and ethylene glycol building blocks generated by the enzyme to generate new PET and produce plastic bottles that were just as strong as those made from conventional plastics, they report today in Nature.
(via Boing Boing)]]>pet plastic recycling enzymes via:boingboinghttps://pinboard.in/https://pinboard.in/u:jm/b:f364a0f9c1b7/A New Dublin Group Looks to Deepen What We Know About Plastic | Dublin Inquirer2020-03-12T12:15:37+00:00
https://dublininquirer.com/2020/03/11/a-new-dublin-group-looks-to-deepen-what-we-know-about-plastic
jmprecious-plastic recycling plastic making dublin irelandhttps://pinboard.in/https://pinboard.in/u:jm/b:76a1d605d9fb/Scientists accidentally create mutant enzyme that eats plastic bottles2018-04-17T10:53:11+00:00
https://www.theguardian.com/environment/2018/apr/16/scientists-accidentally-create-mutant-enzyme-that-eats-plastic-bottles
jmScientists have created a mutant enzyme that breaks down plastic drinks bottles – by accident. The breakthrough could help solve the global plastic pollution crisis by enabling for the first time the full recycling of bottles.
The new research was spurred by the discovery in 2016 of the first bacterium that had naturally evolved to eat plastic, at a waste dump in Japan. Scientists have now revealed the detailed structure of the crucial enzyme produced by the bug. The international team then tweaked the enzyme to see how it had evolved, but tests showed they had inadvertently made the molecule even better at breaking down the PET (polyethylene terephthalate) plastic used for soft drink bottles. “What actually turned out was we improved the enzyme, which was a bit of a shock,” said Prof John McGeehan, at the University of Portsmouth, UK, who led the research. “It’s great and a real finding.”
]]>plastic recycling enzymes science mutants pet bottles greenhttps://pinboard.in/https://pinboard.in/u:jm/b:b671077447cf/In first, 3-D printed objects connect to WiFi without electronics2017-12-06T23:08:13+00:00
https://phys.org/news/2017-12-d-wifi-electronics.html
jm
Physical motion—pushing a button, laundry soap flowing out of a bottle, turning a knob, removing a hammer from a weighted tool bench—triggers gears and springs elsewhere in the 3-D printed object that cause a conductive switch to intermittently connect or disconnect with the antenna and change its reflective state. Information—in the form of 1s and 0s—is encoded by the presence or absence of the tooth on a gear. Energy from a coiled spring drives the gear system, and the width and pattern of gear teeth control how long the backscatter switch makes contact with the antenna, creating patterns of reflected signals that can be decoded by a WiFi receiver.
]]>magic wifi whoa 3d-printing objects plastic gears springshttps://pinboard.in/https://pinboard.in/u:jm/b:efcacd53da28/Make Your Own 3-D Printer Filament From Old Milk Jugs2014-03-21T22:56:37+00:00
http://cleantechnica.com/2014/03/18/make-3-d-printer-filament-old-milk-jugs-exponentially-cheaper-buying-filament-research-shows/
jmCreating your own 3-D printer filament from old used milk jugs is exponentially cheaper, and uses considerably less energy, than buying new filament, according to new research from Michigan Technological University. [...] The savings are really quite impressive — 99 cents on the dollar, in addition to the reduced use of energy. Interestingly (but again not surprisingly), the amount of energy used to ‘recycle’ the old milk jugs yourself is considerably less than that used in recycling such jugs conventionally.
]]>recycling 3d-printers printing tech plastic milkhttps://pinboard.in/https://pinboard.in/u:jm/b:7f0a34a84dfb/