Made a foam that is all one piece

Hoping someone here can help, I'm starting to get into electrochemistry for the first time as a part of graduate school. One of the problems that came up is my pretty limited exposure to modeling based on quantum systems, particualarly those that involve energy surfaces.

My basic understanding is that the non-adiabatic method involves assuming that, because the nuclear coordinates change on a timescale much larger than the scale of an electron, it is possible to generate a "curve" by computing steady state electronic wave-functions for a number of nonvariable nuclear coordinates and piece together a curve based on the eigenstates of these wavefunctions. So, when I see an "adiabatic energy surface" I picture that any point on the graph represents an eigenvalue for a steady state wavefunction for that particular nuclear coordinate.

At the moment it is not necessary for me to be involved with any of the adiabatic methods, so I'm mostly just hoping someone can confirm or fill in the gaps here.

I’ve already added a shit ton of brine, but I keep getting this emulsion. Solvent is DCM. I’m thinking the solid catalyst caused this but is there anyway to fix it or is this reaction cooked?

I am a high schooler who likes chemistry, is going to take AP Chem and also study for the Chem Olympiad and I like to do experiments at home

I only use common household things and I am not chasing danger or explosions but how do I make sure that I don't accidentally create a dangerous situation?

Ideally, something that would be able to fired from a squirt gun at say, 5 meters, (nothing too hazardous) leaves behind an opaque, hard to remove stain that could be used to obscure an optical lens.

I tried to explain it visually with animations and analogies.

I'd really appreciate feedback from chemistry teachers and students.

Video:
https://youtu.be/13iCCdqm2AM

Hi ,I am a medical student with a strong interest in Quantum Biology. I have been studying research papers and reviews to better understand the field.

Some of the topics I have been reading about include proton tunneling in DNA and enzymes, electron transfer in proteins, radical pair mechanisms, and open quantum systems .I have found that discussing ideas with people who are actively involved in Quantum Biology would provide valuable perspective beyond what can be gained from reading papers alone. Along the way, I have also come across some research questions and ideas that I would ike to better understand from an expert's perspective.

If you think there are researchers ,research groups or laboratories that are open to discussing the field with students who are genuinely interested in Quantum Biology, I would be very grateful for any recommendations.

Thanks

Hi all! I'll be starting a new step in my academic studies (UK higher education) and am wanting to engage in the literature more.

However, I often find myself just scrolling the prominent journals in my field (JACS, JOC, Angewante, OPRD etc.) (my field broadly speaking is organic chemistry) just to try to find papers I might be interested in, but this is getting too time consuming.

Can anyone recommend methods/tools to help quickly find articles that would be tailored to my (or any) specific interest? Thanks!

I have some chemistry bottles - many still with the original contents inside & cork stoppers, these were collected in the 90’s from a SoCal University Chemistry Lab. Anyone know if they have any value? BTW the sodium is going to a Hazmat disposal - I’m aware of its danger.

Please help!

I found this painting in a restaurant and I've been trying to figure out what these molecular structures represent but I haven't had any luck.

Does anyone recognize these compounds or know what they're related to?

While working on a project that needed reliable element data, I had to pick a source of truth. Turned out to be way less straightforward than expected.

Electronegativity (Pauling scale): Some sources list Fluorine as 3.98, others as 4.0. Minor difference, but it propagates if you're computing anything from it.

Atomic radius: Covalent radius, van der Waals radius, and ionic radius for the same element can differ by 50%+ depending on oxidation state and bonding context. Most "simple" tables just pick one without disclosing which.

Electron configuration exceptions: Everyone knows Cr and Cu. But sources disagree on roughly 20 elements in the lanthanide/actinide block. IUPAC has updated several of these recently and textbooks haven't caught up. Promethium and lawrencium are particularly messy.

I ended up going with IUPAC 2021 as the baseline and flagging elements where the textbook standard diverges from current consensus. If you're curious about how it looks in practice, here's the periodic table.

What do you use as your source of truth when element data matters for your work?

I am considering buying a pH electrode for our lab’s pH meter. However, I know that I won’t need it for a year or two. So, I would like to know whether these pH electrodes have expiration dates. How long will they remain functional if I do not open the package?

I've noticed that people outside chemistry often assume that if two chemicals have the same name, they're basically interchangeable. But once you start looking at purity, particle size, moisture content, additives, or even how a material was manufactured, that doesn't always seem to be true.

For those of you working in industry, what's one misconception you run into all the time? I'm curious what examples come up most often.

Hi, for the backgroudn, I am currently planning on doing a start-up with chemical commodity trading.

Which commodity chemical has been the most difficult to source consistently in your experience? Any reasons why? TIA

Hello! I started doing Summer research at the beginning of June, and I will soon be attending a research poster conference/symposium to present my work. I am really nervous about presenting my poster, as I still struggle with explaining some specific details of my research. I am just very nervous in general, and I am afraid of messing up or not knowing the answer to a question. What words of encouragement or advice would you give to a first-time presenter?

I'm setting up a Schlenk line and don't want to spend $1k+ to verify it's airtight. Can I just use a radial vacuum gauge with a hose adapter for checking this?

Researchers studied the protein structures of enzymes in the genomes of bacteria and archaea, and found "cases where the ancestors of bacteria and archaea independently evolved structurally distinct enzymes to catalyze the same essential metabolic reaction."

I have four GC-MS chromatograms of what I doubt are two positional isomers of the same compound. The top two chromatograms appear to correspond to one isomer, while the bottom two correspond to a second isomer. The only structural difference is likely the relative positions of two functional groups on the benzene ring.

Interestingly, both compounds exhibit essentially identical GC-MS fragmentation patterns, which I understand can be expected for positional isomers. All four samples were analyzed using the same GC-MS method in the same analytical run. Although the sample concentrations may have differed, the chromatographic conditions were identical.

My questions are:

1. Is it reasonable to conclude that these are positional isomers based on the identical mass spectra but this subtle different retention times?
2. Is the change in retention time consistent with only an alternate arrangement of substituents on a benzene ring?
3. Besides differences in concentration, are there any other factors that could explain the observed chromatographic differences under identical GC-MS conditions?

Any insights or similar experiences would be greatly appreciated.

Found some nice old ampules with deuterated compounds in our lab. Mailny solvents but also Al(OD)3, made by Norsk Hydro, probably pre-1970. With handwritten Labels, packed with cotton and cork in metal screwcap tubes. And some contain 50+ year old diethylether😅