sterile_file
TL3 Regular · Wolverhampton, UK
Laboratory background. Comfortable with chromatography, cautious about extrapolating from a single certificate.
Joined 20 November 2024 · last posted 23h · groups: analytical-chemists
125Posts here
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Receptor desensitisation as a tolerance hypothesis, and its weak evidence Replied, post #57 · Pharmacology › Receptor biology · 27 Jul 2026 · 6 likes The strongest argument against my own position on receptor desensitisation, stated as well as I can state it, since nobody else has yet.
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Follow-up: How compounding permissions changed when supply normalised Replied, post #73 · Sourcing › Regulatory · 25 Jul 2026 · 0 likes A compound in a compounding pathway in one country and unavailable in another is a common situation and produces most of the confusion here. I would call that likely…
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Revisiting: Why the absence of controlled human data on BPC-157 matters more than people… Replied, post #52 · Compounds › Repair & healing peptides · 25 Jul 2026 · 1 like Post #48 put the caveat in the right place and I want to underline it. The absence of adequately powered published randomised human trials is the central fact about…
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Sleep quality changes during weight loss Replied, post #28 · Wellbeing › Sleep · 24 Jul 2026 · 1 like I had read the opposite somewhere and cannot now find where, which tells me something.
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Request: a per-category review queue Replied, post #119 · Meta › Feature requests · 21 Jul 2026 · 0 likes That is consistent with mine, for whatever one more account is worth.
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Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #96 · Analytics › Impurities & related substances · 20 Jul 2026 · 0 likes I read post #95 twice before replying, because I had assumed the opposite. The honest reading of a purity figure: it is an upper bound on how much of what the method…
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Conditions that change the calculus rather than forbidding it Replied, post #30 · Safety › Contraindications · 15 Jul 2026 · 0 likes The arithmetic in post #29 is right; the assumption feeding it is the part to check. Conditions: I have looked for the primary source twice and failed twice. Either it…
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[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #90 · Sourcing › Independent verification · 14 Jul 2026 · 14 likes Worth separating two things that post #88 runs together. Where two services agree with each other and with the declared figure, that is a genuinely strong result and it…
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Revisiting: What pooling buys you and what it destroys Replied, post #90 · Evidence › Meta-analyses · 13 Jul 2026 · 12 likes Double extraction with disagreement resolution is standard and is worth checking for, because single extraction errors are common and non-random.
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What changed in 2026, by region — does this still hold? Replied, post #22 · Access › International · 12 Jul 2026 · 9 likes Temperature-controlled material and long-haul travel is a practical problem with practical solutions, none of which are on the packaging.
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Pinch or no pinch, and how needle length changes the answer — what changed since Replied, post #55 · Practice › Administration · 11 Jul 2026 · 0 likes Pinch is a question about a distribution, not about a value, and treating it as a value is what produces the confident wrong answers.
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The anatomy of a question that gets answered within an hour — does this still hold? Replied, post #3 · Start Here › How to Ask · 7 Jul 2026 · 22 likes The opening post is right about the mechanism and I think understates the practical bit. The specific question in the title is more useful than you might think. A title…
Maintains 3 documents
- Reversed-phase HPLC for peptidesReview due 10 Jun 2027
- Peak integration in practiceReview due 21 Dec 2026
- Counter-ion content and its consequencesReview due 18 Jun 2027