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Dean Astumian, OFS

@deanast

Secular Franciscan, follower of Jesus and St. Francis, physicist interested in operating principles of synthetic and biological molecular machines, and non-equilibrium chemistry, wine, hiking, travel, social justice.

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Latest posts by Dean Astumian, OFS @deanast

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Pope's March prayer intention: 'for disarmament and peace' - Vatican News Pope Leo XIV releases his prayer intention for the month of March, inviting Catholics to pray with him for 'disarmament and peace,' and praying that ...

"We lift up our prayer for peace in the world, asking that nations renounce weapons and choose the path of dialogue and diplomacy." #PopeLeoXIV #PrayForPeace www.vaticannews.va/en/pope/news...

06.03.2026 18:04 πŸ‘ 21 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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I am frankly more concerned about the apathy of the American public and even more importantly the lack of leadership in the Democratic Party.

This is not a dress rehearsal. Every single American must speak out against this Facist administration.

06.03.2026 13:40 πŸ‘ 11519 πŸ” 4554 πŸ’¬ 691 πŸ“Œ 301
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Why hasn't Pam Bondi released the FULL Epstein files, as required by our subpoena and the law?

β€œThe Dow" isn't an acceptable answer.

Stop the cover-up. Release the files, NOW.

06.03.2026 15:13 πŸ‘ 321 πŸ” 118 πŸ’¬ 17 πŸ“Œ 5

Is re-exonerated a word?

06.03.2026 20:06 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

It is good to have tweets on Duns Scotus rather than SCOTUS Dunces.

06.03.2026 19:50 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Ukraine has confirmed it will assist the United States in defending against Iranian-made Shahed drones in the Middle East, marking a notable expansion of Kyiv’s military cooperation beyond Europe.

05.03.2026 18:09 πŸ‘ 362 πŸ” 103 πŸ’¬ 82 πŸ“Œ 29

The guy who said "Don't lie to me" very probably voted for Trump.

06.03.2026 15:13 πŸ‘ 33 πŸ” 2 πŸ’¬ 2 πŸ“Œ 0

The last time Trump got out of his car to pump gas, prices were indeed very low. It was probably 1964.

06.03.2026 15:09 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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#TrumpTrainWreck

06.03.2026 12:47 πŸ‘ 73 πŸ” 46 πŸ’¬ 2 πŸ“Œ 0
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"War is a sacrilege that wreaks havoc on what is most precious on our earth: human life, the innocence of the little ones, the beauty of creation. Yes, war is a sacrilege!" #PopeFrancis #PrayForPeace

06.03.2026 14:15 πŸ‘ 39 πŸ” 12 πŸ’¬ 0 πŸ“Œ 0

Does anyone need any more proof that Putin has Trump in his pocket?

Europe, you better get your ass in gear. Putin is coming for you and you are the only one that is able to stop him. You are on your own. Get in the fight with Ukraine.

Slava Ukraine
Crimea is Ukraine
Fuck Putin

06.03.2026 00:59 πŸ‘ 5 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0

To reiterate, microscopic reversibility is the organizing principle by which free-energy transduction from a chemical source can be understood. Invoking kicks and Maxwell's demon and judo throws etc. obscures that simple truth.

06.03.2026 11:49 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

blackbody radiator at ambient temperature, where every absorption and translations would be as likely as reverse translation and stimulated emission.

06.03.2026 11:47 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Photochemical energy transduction can be viewed at the single molecule level - a single photon interacts with a single enzyme molecule to give rise to a "non-equilibrium" trajectory. This picture fails for ATP hydrolysis. It would also fail for photons if we view illumination source as a

06.03.2026 11:46 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

delivering a packet of energy in a way similar to how a photon delivers a quantum of energy is just plain incorrect. When hydrolysis occurs at the active site - and it does occur at and away from equilibrium - the enzyme has no way of knowing the bulk chemical potentials.

06.03.2026 11:42 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

The most likely sequence of molecular motions following ATP hydrolysis is the same at (chemical potentials of ATP and ADP the same) and away from thermodynamic equilibrium (chemical potentials different). The only difference is the likelihood of entering that trajectory. The picture of ATP

2/n

06.03.2026 11:40 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Molecular machines work not by back and forth flows of energy in single molecules but by biasing probability distributions of ensembles of trajectories. Energy is equipartitioned at every instant - thermal equilibrium.

1/n

06.03.2026 11:39 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

How many want him impeached over his mishandling of immigration/deportation? How many want him impeached over his sending us to war illegally? How many want him impeached over how his administration is making measles great again? The list goes on and on.

06.03.2026 10:59 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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06.03.2026 04:29 πŸ‘ 12 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

so far I have not seen any careful study discriminating whether the enhance diffusion scales with the total number of turnovers - sum of S to P and P to S - or net turnovers - S to P minus P to S. The former could be varied even under thermodynamic equilibrium conditions.

06.03.2026 10:50 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I particularly dislike the term "kick" - what exactly is being suggested with this imagery? Enzymes, whether the chemical potential difference of the reaction they catalyze is 20 or 2 times RT are in mechanical and thermal equilibrium, and the only disequilibrium is thermodynamic.

06.03.2026 10:46 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 1

I fear that the language by which we report the war in Iran we lose sight of the fact that "strikes" implies people being killed. Trump is correct - death is the inevitable result of war - but sentient people then conclude that war should be avoided, not that death should be accepted

06.03.2026 10:42 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

But do they receive "kicks" such that some degrees of freedom have more energy than others? A better picture - the demon indiscriminately opens a gate "away from thermodynamic equilibrium" - enhanced diffusion - with kinetic asymmetry providing direction - chemotaxis.
pubs.acs.org/doi/10.1021/....

06.03.2026 10:36 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Thank you, Sir, for speaking plain truth.

06.03.2026 01:51 πŸ‘ 5634 πŸ” 1801 πŸ’¬ 185 πŸ“Œ 128

It would be better to appoint Brucewayne

06.03.2026 01:44 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

πŸš¨βš–οΈπŸ‘€ If true, this is horrifying. There are a lot of threats in the Epstein files and the messages telling victims to β€œkeep their mouths shut” has been reported again and again. www.justice.gov/epstein/file... #doj #epstein #trump

06.03.2026 01:13 πŸ‘ 230 πŸ” 90 πŸ’¬ 6 πŸ“Œ 6

whenever there is trouble, Capt. America will throw her at the enemy.

05.03.2026 20:25 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

The sun burning out is an imminent threat to civilization, and will be for the next several billion years. Perhaps Trump should bomb it.

05.03.2026 19:42 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I foresee and epidemic of bone spurs.

05.03.2026 18:52 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

"High gas prices would never have happened had Biden not bombed Iran to take out Ayatollah", next week news headline.

05.03.2026 16:54 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0