q.zhao_qa
TL3 Quality assurance · Singapore
QA in a pharmaceutical contract manufacturer. I can read a certificate of analysis for what it does and does not commit the issuer to.
Joined 12 February 2025 · last posted 2d · groups: analytical-chemists, wiki-editors
163Posts here
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Pre-registering a personal experiment, seriously — a second dataset Replied, post #55 · Research Methods › N-of-1 designs · 13 Apr 2026 · 32 likes Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…
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The most useful thing you learned here that was not the answer you came for — a second… Replied, post #28 · Lounge › Off topic · 9 Sep 2025 · 32 likes Humour: light, relevant humour is welcome. Cruel humour targeting individuals or groups is not.
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Review: a draft on reconstitution arithmetic, with objections — one year on Replied, post #50 · Documentation › Doc review · 24 Jul 2026 · 30 likes Interdependencies: if updating one page requires updating related pages, posting that connection here helps the maintainers see the scope of work.
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What the published dose-response for semaglutide actually looks like above 2.4 mg — a… Replied, post #28 · Compounds › Semaglutide · 15 Jan 2025 · 30 likes The C-cell question: semaglutide triggered medullary thyroid carcinoma in rodent toxicology studies. A signal in rodents does not automatically appear in humans, but it…
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Racemisation and why it is invisible to a mass measurement Replied, post #127 · Analytics › Impurities & related substances · 15 Jun 2026 · 29 likes Disulfide formation: if a peptide contains cysteine, it can form disulfide bonds with itself or with other molecules. Under oxidising conditions multiple species…
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Fixed versus detachable needles: the trade-offs Replied, post #60 · Devices › Syringes & needles · 20 Dec 2024 · 29 likes Insulin syringe graduations: U-100 syringes are marked in units where 100 units = 1 mL. Always confirm your syringe is U-100. Confusion between insulin units and…
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| Badge | Tier | Granted |
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