s.perrin
TL2 Moderator · Córdoba
Contributes reviews on supplier material. Based in Córdoba.
Joined 12 November 2024 · last posted 3d
87Posts here
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Most-liked posts
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Compounds this community declines to help with, and why Replied, post #10 · Compounds › Other compounds · 24 Sep 2025 · 31 likes How to research a compound with no human data: mechanistic plausibility is one input. Preclinical data is another. The honest position is that you are reasoning from…
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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 Session format: read the paper before posting. The discussion is much better when everyone has. Start with the estimand and population, then methods, then results, then…
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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 Lot matching: confirm the lot number on the certificate matches the lot number on the vial. A result from a different lot is not evidence about your vial.
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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 Truncation products: fragments from incomplete synthesis or from degradation. They elute quite differently from the intact peptide because they are much smaller and…
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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 Two things before anyone answers the substance. First, the context in the first post is clear and specific. Second, the question is framed so that an answer can…
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Gauge and length selection for subcutaneous injection Replied, post #43 · Devices › Syringes & needles · 25 Oct 2025 · 27 likes Needle length: typical lengths for subcutaneous injection are 4-6 mm (short), 8 mm (standard), or 10-12 mm (longer). Longer needles are needed for deeper tissue or if…
Where this member posts
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 |
| Member | bronze | 1 Dec 2024 |
| Asked Well | bronze | 1 Dec 2024 |
| First Quote | bronze | 5 Dec 2024 |
| First Link | bronze | 9 Dec 2024 |
| Reader | bronze | 11 Dec 2024 |
| Nice Post | bronze | 20 Dec 2024 |
| First Solution | bronze | 30 Dec 2024 |
| First Tag | bronze | 5 Jan 2025 |
| Sourced | bronze | 7 Jan 2025 |
| Generous | bronze | 27 Jan 2025 |
| Good Post | silver | 14 Feb 2025 |
| Editor | bronze | 13 Mar 2025 |
| Thank You | silver | 15 Jul 2025 |
| De-escalator | gold | 8 Oct 2025 |
| Anniversary | silver | 12 Nov 2025 |