Another apparatus question: anyone know what this is?
Two glass bulbs connected by a glass tube. Watery orange liquid inside.
**Edit: It's called a "pulse glass" or "Franklin's palm glass."
A liquid with a very low boiling point is sealed. Holding one bulb will boil the liquid and it will flow to the opposite side. Used to show vapor pressure, IMFs, etc. Very cool piece of old equipment.
I don't talk about work here a whole lot, but I'm a chemical engineer by education and have been doing environmental engineering work for the past 17 years.
So, I have an organic chemistry molecular model kit that I have kept at work for years. I, periodically, make contaminants I've seen at various sites across my 17 year career cleaning up the environment.
Do you know what this chemical is supposed to be? Leave a comment below with your guess!
British scientist Rosalind Franklin died #OTD in 1958.
Her most famous contribution to science came from her X-ray diffraction images of DNA, particularly Photo 51, which provided crucial evidence for the double helix structure of DNA. Her photo was shared without her knowledge with J. Watson & F. Crick, who used it as a basis for their model of DNA's structure. Their work overshadowed her contribution, & she was not fully recognized for her role until after her death.
Belgian chemist, industrialist and philanthropist Ernest Solvay was born #OTD in 1838.
He is best known for his pioneering work in the chemical industry and for the establishment of the Solvay process for the manufacture of soda ash (sodium carbonate). In 1911, he began a series of important conferences in physics, known as the Solvay Conferences, whose participants included Max Planck, Ernest Rutherford, Maria Skłodowska-Curie, Henri Poincaré, and Albert Einstein.
The portrait of participants to the first Solvay Conference in 1911. Ernest Solvay is the third seated from the left. Solvay was not present at the time the photo was taken, so his photo was cut and pasted onto this one for the official release.
Happy birthday to #biochemist Marie Maynard Daly (1921-2003), 1st Black woman to earn a PhD in #chemistry in the US! She made important research contributions to our understanding of the biochemisty of the cell nucleus & cardiovascular issues & the chemistry of histones & protein synthesis. She established that "no bases other than adenine, guanine, thymine, and cytosine were present in appreciable amounts" in DNA - #womenInSTEM#BlackInSTEM#histstm#printmaking#linocut#histmed#HeartDisease
The temptation to make baked goods I can't/won't eat just because I have a fresh batch of aqua faba...
I almost typed aqua regia there, and yeah I need to make some of that too, but I don't plan to do that at home or use it in baking.
If you live nearish and want some of the good vegan/gluten (grain) free cookies let me know and maybe we can meet up so I have an excuse to bake them (someone gifted me another bag of almond flour a couple of weeks ago).
Can anyone think of a way to "quench" a HBTU/HATU/etc type coupling that doesn't involve adding water?
I've used MeOH, but I sometimes get MeOH esters which in at least one case proved to be inseparable from the desired amide product (I'm sure you know exactly how frustrating that was).
It might be possible to use <1 equiv of water with my conditions, but I'd really rather not since I directly load onto silica and do not do an aqueous work-up.
Interesting food chemistry story. Also implicitly a story about plant breeding. Many crops have different cultivars not just for different climates, but for different uses. #PlantBreeding#Chemistry#Food
British chemist and physicist William Crookes died #OTD in 1919.
He was a pioneer of vacuum tubes, inventing the Crookes tube which was made in 1875. This was a foundational discovery that eventually changed the whole of chemistry and physics. His experiments with cathode rays laid the groundwork for the discovery of the electron by J.J. Thomson. He is credited with discovering the element thallium, announced in 1861, with the help of spectroscopy.
Some egregious #AI art is now appearing in figures of peer-reviewed papers. But let’s take a moment to remember that #chemistry table of contents (TOC) graphics have always been completely unhinged!
These are all from the TOC graphics of real peer-reviewed papers in legit journals, most preceding the current AI hype cycle.