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#chemical

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The biological world is awash in #chemical signals.

Some molecular messages find their targets; most linger unread in the environment.

But sometimes, other #species — chemical eavesdroppers, bystanders or visitors — can pick up and interpret the signals in their own way.

If the message is powerful enough, the impact can ripple out across an #ecosystem.

#biology #ecology #evolution #biochemistry
quantamagazine.org/a-new-chemi

Quanta Magazine · A New, Chemical View of EcosystemsBy Molly Herring

#Trump’s #DOJ is to drop suit over alleged #cancer-causing #pollution

#Justice is poised to drop a landmark lawsuit alleging that cancer-causing pollution from a #Louisiana #petrochemical plant poses an imminent danger to nearby communities….

The lawsuit alleges that the Denka Performance Elastomer plant in #LaPlace, LA, threatens local residents by releasing unsafe levels of the #toxic #chemical #chloroprene.
#law #PublicHealth #health #environment #USpol
washingtonpost.com/climate-env

The Washington Post · Justice Department is poised to drop suit over alleged cancer-causing pollutionBy Maxine Joselow
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#Formaldehyde, the #chemical of choice for undertakers & embalmers, is also used in products like furniture & clothes. But it can also cause #cancer & severe #respiratory problems. So, in 2021, the #EPA began a new effort to #regulate it.
The #chemicals industry fought back w/an intensity that astonished even seasoned ofcls. Its campaign was led by Lynn Dekleva, then a lobbyist at the American Chemistry Council, an #industry group that spends millions on govt #lobbying.
#PublicHealth #law #USpol

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Jim Jones, the director of the #FDA’s #FoodSafety division, resigned on Mon, citing what he called “indiscriminate” layoffs that would make it “fruitless for him to continue.”

In his resignation letter, Jones estimated that 89 people of the 2k in his division were fired over the weekend, many of them freshly hired to do more in-depth work on #chemical #safety to protect the nation’s #food supply.

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Electric propulsion systems are not #energy limited. An arbitrarily large amount of energy can be delivered (from a #solar ☀️ or #nuclear ☢️ power system) to a given mass of propellant so that the exhaust velocity (or specific impulse) can be much larger than that available from a #chemical propulsion system. Electric propulsion systems are termed "#power 🔋 limited" sci.esa.int/web/smart-1/-/3420

sci.esa.intESA Science & Technology - Electric Spacecraft PropulsionElectric Spacecraft Propulsion
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The #3Dprinted prototype was able to generate thrust more #efficiently than larger, more expensive #chemical rockets and outperformed existing droplet #electrospray engines. It can be produced rapidly and for a fraction of the #cost 💵 of traditional thrusters and even be fully made in #orbit 🌌 news.mit.edu/2025/mit-engineer

MIT News | Massachusetts Institute of TechnologyMIT engineers develop a fully 3D-printed electrospray engineBy Adam Zewe | MIT News