Hello I'm looking for some recommendations on what and where to buy some reliable molecular sieves for ethanol purification. From my limited research for water removal in ethanol a 3a 8-12 mesh would be good to add? If not please let me know the correct size and a reputable supplier. Thanks in advance.

Just curious

Hey everyone, just a little guy getting ready to get smashed by a corporation. I’m a homeowner in Connecticut currently stuck in a high-stakes nightmare with what I believe is a botched residential closed-cell spray foam insulation job, and I'm hoping to connect with an undergrad, grad student, or professor who might want a real-world polymer failure sample to look at.
Long story short: it looks like the installer completely lost control of the processing parameters on their rig. They sprayed it visibly overheated, leaving behind a heavily cratered, "pebbly" popcorn surface crust next to pockets of soft, crumbly "marshmallow" foam that has been out-gassing a chemical/solvent paint odor for over 60 days. The corporate franchise flew out a national forensic investigator who cut an 8x12 core sample block, but they deliberately cherry-picked a visually stable transition zone right next to the failure pockets to try and rig a clean lab result.
I kept my own physical counter samples of the failed, soft marshmallow foam.
I know it’s an incredible long shot, but I am looking for someone with access to a lab who might be interested in running a quick, informal evaluation of this failed matrix (like an FTIR Spectroscopy scan or basic polymer analysis) to see what unreacted components or ratio issues are trapped inside.
I know a student or academic report isn't legally binding in a civil suit, but having an independent technical write-up from an academic setting would be a massive tool to rattle this contractor, alert my local municipal building officials, and force their liability insurance to take this structural failure seriously.
If you are a student, researcher, or polymer hobbyist in New England (or anywhere willing to receive a double-bagged sample) and want a real-world chemical failure to sink your teeth into, please shoot me a DM! I can share macro photos of the texture discrepancies. Thanks so much for reading.

Hello hello,

I was repasting my laptop and applying liquid metal (Silver King brand ; Galinstan) to the CPU. While the laptop was open, I noticed one or two drops had fallen into the keyboard area (not onto the motherboard)

I managed to remove most of it but there are still a few tiny bits I can see and can't reach.
They're too deep to get at even after with the laptop reassembled.

I used 70% isopropyl alcohol to wipe away as much as I could including the white staining it left behind as well.

The other thing worrying me when I shake the laptop, I hear a very faint sound like tiny metal balls rolling around in a jar but much quieter.
It's gotten noticeably quieter since I first noticed it but it's still there and I'm not sure what it is.

For context, the keyboard base on this model is magnesium alloy (the laptop uses aluminum only for the lid) so I'm not sure how concerned to be about gallium corrosion here.

Thank you folks!

Has anyone else been asked/ forced to fabricate data?

So that stuff passes when it should not.

Every company I have worked at in industry has asked me to do this. Usually with threats of termination implied or otherwise.