e.mensa
TL2 · Recife
Contributes reviews on supplier material. Based in Recife.
Joined 18 May 2025 · last posted 2d
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Distinguishing a deletion sequence by mass alone Replied, post #100 · Analytics › Mass spectrometry · 17 Feb 2025 · 32 likes I have been on both sides of the distinguishing a deletion sequence argument in this category within eighteen months, which should tell you how strong the evidence for…
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Counter-ion content and its effect on measured mass Replied, post #13 · Analytics › Mass spectrometry · 8 Apr 2025 · 30 likes Post #12 describes the usual case. This is about the unusual one. Tandem mass spectrometry: MS/MS fragments the molecular ion and uses fragment masses to confirm…
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Coming back to: Washout: how long is long enough, and for what purpose Replied, post #26 · Pharmacology › Pharmacokinetics · 27 Jan 2026 · 29 likes A pharmacokinetic model fitted to trial data describes the population studied. Applying it to somebody outside the enrolled range is an extrapolation, and the model…
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Sequence verification for an obscure compound: how it is done Replied, post #9 · Compounds › Other compounds · 9 Apr 2025 · 27 likes Research-use-only status is a legal classification, not a safety classification. It means the compound is sold for laboratory use and not for human consumption or…
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Injecting into an area that has become firm: why not to Replied, post #40 · Practice › Administration · 9 Jun 2026 · 26 likes Noted, and I have changed what I was going to do on the strength of it.
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Half-life, steady state, and accumulation worked through — a second dataset Replied, post #31 · Pharmacology › Pharmacokinetics · 4 Dec 2025 · 26 likes Washout after stopping takes roughly the same four to five half-lives as reaching steady state. A month after the last dose is not the same as none.
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