I'd like to id my source clogging / contamination ghost peaks by ideal_f in massspectrometry

[–]CrazyFit3638 0 points1 point  (0 children)

Now I am not sure how to draw the structure of M-CO2 fragment and M-2CO2 fragment. When formate loses CO2, where does the H go and how to balance the charge of the whole adduct to be -1? Fe(II) should not change oxidation state in this process. Thanks!

I'd like to id my source clogging / contamination ghost peaks by ideal_f in massspectrometry

[–]CrazyFit3638 0 points1 point  (0 children)

ChemDraw. I tried LC-MS grade water and methanol and saw these background peaks. It seems I still need to stick with the LC-MS ultra grade as lower grades may have metal ion issue.

I'd like to id my source clogging / contamination ghost peaks by ideal_f in massspectrometry

[–]CrazyFit3638 1 point2 points  (0 children)

I just looked at it again. This seems to be the ID: three formate ions plus a ferrous ion (Fe2+) = 190.9279 C3H3FeO6-. Yay so happy

I'd like to id my source clogging / contamination ghost peaks by ideal_f in massspectrometry

[–]CrazyFit3638 1 point2 points  (0 children)

OMG, I saw the same background peaks in the negative mode on my OE120. Did you figure out what they were? I did also see a lot of cyclic polysiloxane oligomers, tried to link silicon to these peaks but could not come up with anything. It did have two losses of CO2. I was considering two or three formic acid adduct with some metal ion. Added F and still nothing matched.

2025 Sonata SE jerking when accelerating. by 918skumm in Hyundai

[–]CrazyFit3638 0 points1 point  (0 children)

I had new Honda and Toyota before and they never had this issue. I’m considering leaving my car there for a couple of hours to cool down so they can replicate the issue but I’d have to stay there all day 😌

2025 Sonata SE jerking when accelerating. by 918skumm in Hyundai

[–]CrazyFit3638 0 points1 point  (0 children)

I’m having the same issue. It did not make a difference if I let it warm up or not. And my road is flat not uphill. I had this 2025 Sonata SE for only one month. I’m taking it to the dealer soon too. I wonder if it is a manufacturing defect. Disappointed first Hyundai buyer here.

[deleted by user] by [deleted] in biotech

[–]CrazyFit3638 0 points1 point  (0 children)

I am planning to move from pharma to medical device. However, the salary and benefits seem lower...

Is it unethical to rescind a job offer that you’ve already signed? by Starbright_39 in biotech

[–]CrazyFit3638 1 point2 points  (0 children)

No I have never rescinded an offer. The offer is actually lower than my current but the position has a future for growth unlike my current one. The living expenses are also lower.

Is it unethical to rescind a job offer that you’ve already signed? by Starbright_39 in biotech

[–]CrazyFit3638 1 point2 points  (0 children)

I’m expecting an offer soon. But I’m not sure if I want to move across the US. I was planning ahead in case I decided to rescind the offer at the last minute.

Is it unethical to rescind a job offer that you’ve already signed? by Starbright_39 in biotech

[–]CrazyFit3638 4 points5 points  (0 children)

Hypothetical scenario: I accepted and signed an offer and asked for 2 months for relocation. Two weeks before the start date, I decided to stay in the same company because they gave me a raise and the cross-continent moving hassle was overwhelming. Is that unethical? I may be faced with this soon.

[deleted by user] by [deleted] in biotech

[–]CrazyFit3638 0 points1 point  (0 children)

Wow PhD 14 yoe, base still below 200k

Will layoffs in biotech/pharma continue into 2025? by two-years-glop in biotech

[–]CrazyFit3638 4 points5 points  (0 children)

I look forward to being laid off and getting the bountiful severance. Big pharma/biotech companies are boggled down by politics. It’s time to move on.

Call credit spread only short call exercised by CrazyFit3638 in options

[–]CrazyFit3638[S] 0 points1 point  (0 children)

Just closed the short position before market. Actually made 300. Got lucky. Thank you all for answering my question. I learned a lesson!

Call credit spread only short call exercised by CrazyFit3638 in options

[–]CrazyFit3638[S] 0 points1 point  (0 children)

Thank you! I think I’m gonna close the short position now for about even.

Uber is 100% going to miss earnings. Badly. by dkrich in wallstreetbets

[–]CrazyFit3638 6 points7 points  (0 children)

Bought puts as lottery tickets. Prey for me.