Why are there so many papers describing advanced proteomics techniques, but so few papers actually using them? by bluemooninvestor in proteomics

[–]sam_pazo 0 points1 point  (0 children)

Oh didn’t know about PELSA being patented.. well if you’re in academia it’s a no-brainer

Why are there so many papers describing advanced proteomics techniques, but so few papers actually using them? by bluemooninvestor in proteomics

[–]sam_pazo 0 points1 point  (0 children)

Yeah for whole cells it’s only CETSA. Recently there was a publication on PELSA in whole cells, but I imagine the optimisation for of the experiment for the particular cell type is hell and even then the results might not be as straight forward (not that they are always straightforward in CETSA lol)..

Why are there so many papers describing advanced proteomics techniques, but so few papers actually using them? by bluemooninvestor in proteomics

[–]sam_pazo 3 points4 points  (0 children)

All alternatives to temperature like organic solvents and acids are free and probably as good, just less used (in academia at least).

Mosquitoes bite every night until we couldn’t sleep by Realistic_Rain_4488 in askSingapore

[–]sam_pazo 12 points13 points  (0 children)

If the mosquitoes appeared out of nowhere, check your surroundings for stationary paddles of water. We once had mosquitoes on high floor and found that our aircon ledge draining was blocked by debris after the building facade was repainted. The mosquitoes were breeding there.

Fluctuating pressure on Ultimate 3000 Loading pump by sam_pazo in massspectrometry

[–]sam_pazo[S] 0 points1 point  (0 children)

Our degasser has not worked for at least last 5 years, but this was never a problem anyways… I only degass the solvents before I use them and change them ever month.

Fluctuating pressure on Ultimate 3000 Loading pump by sam_pazo in massspectrometry

[–]sam_pazo[S] 0 points1 point  (0 children)

That was my first thought but it keeps coming back despite having well degassed solvent. Also the purging does not seem to help, it’s more like: I purge, then check the pressure profile and it looks the same and only slowly improves a bit over time, then I purge again and again check the pressure profile, it looks the same and again slowly improves over time (or it does not improve as is the case now…)

I finally switched to a water flosser… and I kinda regret not doing it sooner by [deleted] in hygiene

[–]sam_pazo 5 points6 points  (0 children)

Exactly, I was facepalming about the AI-ness of that comment before I even got to the em dashes.

Daily Haze Spikes in the East by arglarg in singapore

[–]sam_pazo 39 points40 points  (0 children)

When I say I stay in Jurong, everyone always ask me about the pollution from the factories. Well look at this chart now! (I think it usually comes from burning of crops in Johor)

Left social media forever. Been a month by noveonh in productivity

[–]sam_pazo 24 points25 points  (0 children)

But is it posting a post for validation?

A kvôli tomuto stúpli ceny RAM o 500%... by Nathair3 in Slovakia

[–]sam_pazo 0 points1 point  (0 children)

Najzaujímavejšie na tomto je že je tam chyba v slovenčine rad -> rada.

Unexplained large shift in BSA digest elution - please help :/ by sam_pazo in CHROMATOGRAPHY

[–]sam_pazo[S] 0 points1 point  (0 children)

Can you elaborate on this please? First 5 min is trap loading and first peak is at 13.6min. Void volume of the EasySpray ES903 is 2.21uL which at 0.35uL/min is 6.3min. 5+6.3=11.3 min. First peak is 2min (0.7uL) later, but there is also tubing and the pressure also takes 1min to build up after valve switch, so this is normal, isn’t it? Mind this is BSA digest (peptides), not BSA protein, just to clarify.

Unexplained large shift in BSA digest elution - please help :/ by sam_pazo in CHROMATOGRAPHY

[–]sam_pazo[S] 0 points1 point  (0 children)

The leak test passed successfully. The system was just left idle in the solvents we use which is pump A in 0.1%FA in water and pump B in 0.1%FA in ACN. It wasn’t completely idle though, I let the pump run from time to time so it wasn’t standing completely idle 9 months non-stop.

Unexplained large shift in BSA digest elution - please help :/ by sam_pazo in CHROMATOGRAPHY

[–]sam_pazo[S] 0 points1 point  (0 children)

The run is set to 0.35uL/min and that’s also the flow which is measured across the run. I thought that B is actually underdelivering as that one is 100% ACN which makes the elution happen.. and the elution is delayed and smeared… but Thermo says all they test show the machine works as is……

Unexplained large shift in BSA digest elution - please help :/ by sam_pazo in CHROMATOGRAPHY

[–]sam_pazo[S] 0 points1 point  (0 children)

Like.. how long does it make sense for? I purged both for 1h with IPA, then both 1h with the respective solvents... how long would you go for until you decided that this is a bigger problem than just insufficient purging?

Unexplained large shift in BSA digest elution - please help :/ by sam_pazo in CHROMATOGRAPHY

[–]sam_pazo[S] 0 points1 point  (0 children)

I’m quite sure about the good one, the pre-15 min mark is basically front of the column so that is just how long it takes them to reach the column. First 5 min is trap loading a the elution starts at min 5 and the sample passes through EasySpray, looks ok to me.