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mcherm : chemistry   30

The mysterious crystal that melts at two different temperatures
One double-bond can face 2 ways. Solid is all Z orientation; liquid is 2/3 Z, 1/3 W. Two possible melting processes: @ 90°C all melts then afterward some Z's rotate or @60°C incredibly tiny impurities catalyse Z->W and it melts directly to a mix of Z&W.
chemistry  physics  science  via:HackerNews  materialsscience 
june 2019 by mcherm
Chemistry illustrator
Give it any chemical name or formula and it will draw the molecular diagram for that molecule. The author wrote it in Python.
science  chemistry  programming  via:reddit  useful 
april 2019 by mcherm
Mas Subramanian's Quest for a Billion-Dollar Red
He invented a new blue, and he's trying to invent a new red. Apparently that's a big deal.
color  science  materialsscience  invention  chemistry  via:HackerNews 
april 2018 by mcherm
To fight climate change, carbon capture needs to be made cheaper — Quartz
Teenager invents chemical process that might cut the cost of carbon capture by 85%. Article explains the actual chemistry of it.
science  invention  kids  chemistry  via:rachel 
december 2017 by mcherm
Is Pharma Research Worse Than Chance? | Slate Star Codex
Recent medical research has discovered only a few drugs of marginal use for mental health, but a few things abused by drug addicts may turn out to be quite powerful. Maybe we're being too careful and should evaluate some chemicals with more side effects.
brain  chemistry  ScottAlexander  via:SlateStarCodex 
june 2017 by mcherm
SMBC: Who's On First, Chemistry
A great take on the who's on first skit
chemistry  comic  funny 
january 2017 by mcherm
Sodium's explosive secrets revealed : Nature News & Comment
When Sodium is put in water its electrons are released into the water. This leaves the sodium positively charged it then repels itself which is a fancy word for exploding. This rapidly mixes the sodium and the water which is why their ordinary chemical reaction is so vigorous.
science  physics  chemistry  personal_net  via:HackerNews 
february 2015 by mcherm
Watch "Structure and Functions of a Cell: What is going …" on YouTube
A really amazing view of the workings of many parts of a cell through renderings of the molecules involved.
science  chemistry  via:rachel 
december 2014 by mcherm
'Impossible' Sodium Chlorides Challenge Foundation of Chemistry | Chemistry |
Under high pressure, NaCl can form stable substances with ratios other than 1:1. Some are metals (so extra electrons are distributed); one has alternating layers of NaCl and pure Na (so it's a 2D conductor).
science  physics  materialsscience  chemistry 
december 2013 by mcherm
Polywater history and science mistakes: The U.S. and USSR raced to create a new form of water.
The story of how "Polywater" was discovered (and later proven to be false). A good case study for a mis-step in science and how it got corrected.
via:HackerNews  science  chemistry  history  ScientificMethod 
november 2013 by mcherm
Reprogrammed bacterium speaks new language of life - life - 17 October 2013 - New Scientist
They took the invalid "UAG" and made a bacterium which didn't use that as a stop signal but instead incorporated a special amino acid not normally part of proteins when UAG was encountered. Amazing.
science  chemistry  biology  genetics  via:slashdot 
october 2013 by mcherm
Gamers solve decade old HIV puzzle in ten days
They had a protein folding problem (for HIV) and hadn't been able to solve it for 10 years. They gave it to the online "Foldit" game and they solved it!
gaming  science  gamification  chemistry 
october 2013 by mcherm
New Form of Carbon is Stronger Than Graphene and Diamond | MIT Technology Review
Another form of Carbon. Chains of double-bonded atoms. May be even weirder (is that possible?) but also only partly stable at room temperature.
personal_net  materialsscience  chemistry  via:HackerNews 
august 2013 by mcherm
What does mercury being liquid at room temperature have to do with Einstein’s theory of relativity? | The Curious Wavefunction, Scientific American Blog Network
To predict that gold is yellow or that mercury is liquid at room temperature, you need to take into account relativistic corrections to the quantum mechanical calculations of orbital size. And when you do, it works out correctly.
science  physics  chemistry  quantummechanics  ScientificAmerican  via:HackerNews 
august 2013 by mcherm
Chemistry in the Quantum Vacuum. No, Really.. In the Pipeline:
Stick molecules in really small boxes (so that quantum effects show up) and their chemistry is different.
science  chemistry  physics  via:DerekLowe  DerekLowe 
september 2012 by mcherm
Plutonium: An element at odds with itself
Plutonium has some unusual and unique chemistry (not to mention its use in nuclear weapons).
science  chemistry  physics  via:DerekLowe 
december 2011 by mcherm
A Quasicrystal Nobel Prize. In the Pipeline:
What quasicrystals are (impossible 5-fold symmetry) and how they were discovered. If you've discovered something impossible, that's good: even when the establishment tells you that you're wrong.
via:DerekLowe  chemistry  physics  science  philosophyOfScience 
october 2011 by mcherm
Harry Coover, creator of Super Glue, dies in Tennessee at 94; invented the stuff by accident
Super Glue (cyanoacrylate) was invented "by accident" when a potential plastic material was found to be too sticky to use.
via:reddit  chemistry  science  invention 
march 2011 by mcherm
Relativity Powers Your Car Battery | Physical Review Focus
Lead-acid batteries work (while Tin-acid batteries don't) because the electrons are going fast enough to get relativistic effects.
science  physics  chemistry  quantummechanics  relativity  via:reddit 
january 2011 by mcherm
Sand Won't Save You This Time. In the Pipeline:
That is the most evil chemical substance I have ever heard of!
science  chemistry  via:HackerNews  mypostings 
march 2009 by mcherm
Endangered Species - The Chemistry Set « The 12 Angry Men Blog
Yet another complaint (with footnotes) about how you can't get a chemistry set anymore.
science  chemistry  education  rant  kidsrights  via:boingboing 
november 2007 by mcherm

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