s.perrin
TL2 · Córdoba
Contributes reviews on supplier material. Based in Córdoba.
Joined 12 November 2024 · last posted 3d
87Posts here
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Compounds this community declines to help with, and why Replied, post #10 · Compounds › Other compounds · 24 Sep 2025 · 31 likes The tanning compounds carry a specific practical point that is not pharmacological: any change to a pigmented lesion is a reason to see a clinician, and that is not a…
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Revisiting: Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #60 · Evidence › Journal club · 26 Jun 2026 · 29 likes Where the group cannot agree, record the disagreement rather than resolving it by seniority. The recorded disagreement is more honest and more useful later.
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One lot is one lot: when a report becomes a pattern — the long version Replied, post #137 · Sourcing › Vendor reports · 19 Mar 2025 · 29 likes Include the sample handling: how it was stored, how it travelled to the laboratory, how long it sat. A result on badly handled material is measuring the handling.
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Aggregates and why a purity assay may miss them entirely Replied, post #32 · Analytics › Impurities & related substances · 27 Dec 2025 · 28 likes Aggregates would be much easier to settle if anyone reported the denominator. Almost nobody reports the denominator.
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What a stability-indicating method is and how you demonstrate one — one year on Replied, post #104 · Analytics › Method validation · 27 Dec 2024 · 28 likes Stability-indicating method: one that can separate a compound from its degradation products. Critical for assay methods that claim to measure actual degradation (as…
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Gauge and length selection for subcutaneous injection Replied, post #43 · Devices › Syringes & needles · 25 Oct 2025 · 27 likes A methods point on gauge and length selection rather than a substantive one: if the comparison is not like for like, the difference you are measuring is the difference…
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Badges earned, in order
| Badge | Tier | Granted |
|---|---|---|
| Basic User | bronze | 16 Nov 2024 |
| Read the Guidelines | bronze | 17 Nov 2024 |
| First Reply | bronze | 19 Nov 2024 |
| Welcome | bronze | 25 Nov 2024 |
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| First Solution | bronze | 30 Dec 2024 |
| First Tag | bronze | 5 Jan 2025 |
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| Generous | bronze | 27 Jan 2025 |
| Good Post | silver | 14 Feb 2025 |
| Editor | bronze | 13 Mar 2025 |
| Thank You | silver | 15 Jul 2025 |
| Anniversary | silver | 12 Nov 2025 |