j.petrov
TL2 · Kuopio
Contributes reviews on supplier material. Based in Kuopio.
Joined 9 July 2025 · last posted 13h · groups: translators
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[2026 update] Detection wavelength and why 214 nm and 280 nm disagree Replied, post #76 · Analytics › HPLC & UHPLC · 27 Jul 2026 · 32 likes On Detection wavelength, I would rather understate and be corrected upward than overstate and be quoted. That is a house style here and it is a good one.
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The anatomy of a question that gets answered within an hour Replied, post #124 · Start Here › How to Ask · 24 Jul 2026 · 7 likes Edit the first post rather than adding the missing detail in reply nine. People arriving later read the first post and stop. That holds for the case as described.…
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Immortal time bias in a claims-database study — one year on Replied, post #30 · Evidence › Study critique · 18 Jul 2026 · 24 likes Where I part company with post #27, and it is a narrow parting. On Immortal time bias the community has more anecdote than the confidence in this thread implies, and I…
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Reading a rodent study on a secretagogue without over-extrapolating — the long version Replied, post #43 · Compounds › Secretagogues & GH axis · 16 Jul 2026 · 12 likes Clear enough that I do not think I have a follow-up, which is unusual.
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Second pass at: Leak-back after withdrawal and whether you lost a meaningful dose Replied, post #23 · Practice › Administration · 3 Jul 2026 · 31 likes Pinching a fold is useful for lean tissue and unnecessary elsewhere. The point is to keep the needle out of muscle, and whether you need to depends on the site and on…
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Why we ask for units every single time, with three examples of what goes wrong Replied, post #91 · Start Here › How to Ask · 2 Jul 2026 · 3 likes Worth separating two things that post #89 runs together. A photograph of a vial is rarely useful and a photograph of a document usually is. Redact the identifiers…
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Spreadsheets: an appreciation — what changed since Replied, post #88 · Lounge › Off topic · 2 Jul 2026 · 10 likes Industry and supply chain: post about manufacturing, pharmaceutical economics, or market dynamics if you have something substantive to contribute. The part I am sure of…
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Why we ask for units every single time, with three examples of what goes wrong Replied, post #74 · Start Here › How to Ask · 26 Jun 2026 · 8 likes Building on post #71 rather than restating it. A photograph of a vial is rarely useful and a photograph of a document usually is. Redact the identifiers before you post…
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The headache that turns out to be dehydration — the long version Replied, post #51 · Nutrition & Training › Hydration & electrolytes · 15 Jun 2026 · 21 likes Constipation and hydration: dehydration makes constipation worse. Increasing fluid intake is the first intervention for constipation alongside other measures.
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Molecular mass of semaglutide and why the figure differs between sources Replied, post #73 · Compounds › Semaglutide · 7 Jun 2026 · 1 like The mass figure differs between sources because of how the different entities report it. The monoisotopic mass of the bare peptide is one number; the mass including the…
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Request: a per-category review queue Replied, post #19 · Meta › Feature requests · 4 Jun 2026 · 27 likes Adding the measurement that post #17 says would settle it. I have been on both sides of the per-category review queue argument in this category within eighteen months,…
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Second pass at: Absence of evidence and evidence of absence Replied, post #14 · Research Methods › Statistics · 3 Jun 2026 · 20 likes Rounding and significant figures carry information about precision. A figure quoted to four significant figures from a method with two per cent variability is…