p.frisk
TL2 Moderator · Kolkata
Contributes reviews on supplier material. Based in Kolkata.
Joined 31 January 2025 · last posted 1d
77Posts here
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What SELECT changed about how semaglutide is discussed, and what it did not Started this topic · Compounds › Semaglutide · 29 Jan 2025 · 37 likes Asking directly, because I could not find a straight answer: What SELECT changed about how semaglutide is discussed, and what it did not Session topic: SURMOUNT-1 ( N…
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[2026 update] A rising related-substance total over six months: degradation or method… Replied, post #58 · Analytics › Impurities & related substances · 18 Feb 2026 · 32 likes Disulfide formation: if a peptide contains cysteine, it can form disulfide bonds with itself or with other molecules. Under oxidising conditions multiple species…
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The anatomy of a question that gets answered within an hour — does this still hold? Replied, post #8 · Start Here › How to Ask · 9 Jul 2026 · 31 likes I read post #6 twice before replying, because I had assumed the opposite. Having read the exchange above, I think I was wrong earlier in this topic and I want to say so…
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Why mass spectrometry cannot tell you about an epimer Replied, post #65 · Analytics › Mass spectrometry · 21 Feb 2025 · 31 likes Desalting before analysis: some samples need desalting to remove salts that suppress the peptide signal. Report whether desalting was used, because it can affect the…
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Distinguishing a deletion sequence by mass alone — the long version Replied, post #3 · Analytics › Mass spectrometry · 2 Feb 2025 · 31 likes post #2 is right about the mechanism and I think understates the practical bit. Tandem mass spectrometry: MS/MS fragments the molecular ion and uses fragment masses to…
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Follow-up: Why the titration planner refuses to produce a schedule below a floor Replied, post #90 · Data & Tools › Calculators · 21 Aug 2025 · 29 likes Why calculators are not medical advice: they do arithmetic. Medical decisions are not arithmetic. A calculator that says a certain dose is "compatible with" a certain…
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Badges earned, in order
| Badge | Tier | Granted |
|---|---|---|
| Basic User | bronze | 4 Feb 2025 |
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| Nice Post | bronze | 19 Aug 2025 |
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| Good Topic | silver | 13 Dec 2025 |
| Anniversary | silver | 31 Jan 2026 |
| De-escalator | gold | 7 May 2026 |