ca.vermeulen
TL2 · Monterrey
Contributes reviews on supplier material. Based in Monterrey.
Joined 20 November 2024 · last posted 10h
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Endotoxin and why it is a separate question from purity — what changed since Replied, post #92 · Analytics › Impurities & related substances · 27 Jul 2026 · 26 likes Sensible. I would want the same detail before I acted on it either.
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Fasting versus non-fasting and which tests care Replied, post #73 · Clinical › Bloodwork · 19 Jul 2026 · 0 likes Answering the fasting versus non-fasting question as asked, then the question I think is meant. As asked: yes, with the qualification below. As meant: it depends on how…
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Reading order for a first week here, and what to skip until later — what changed since Replied, post #20 · Start Here › Welcome · 7 Jul 2026 · 0 likes The Lounge is a real category rather than a dumping ground. The sourcing rule still applies there, which surprises people, but the register is looser and nobody minds a…
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Coming back to: Why a preprint's supplementary material is often the best part Replied, post #97 · Evidence › Preprints · 5 Jul 2026 · 0 likes Reading a preprint properly means doing some of the reviewer's job: methods first, then whether the analysis matches the plan, then the conclusion.
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Injecting into an area that has become firm: why not to Replied, post #82 · Practice › Administration · 16 Jun 2026 · 0 likes This follows post #79 rather than contradicting it. If you have to inject at a different time of day than usual, that is a much smaller perturbation than it feels for a…
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Micronutrient adequacy at low total intake Replied, post #93 · Nutrition & Training › Protein & intake · 14 Jun 2026 · 7 likes Micronutrient adequacy becomes a real question at very low total intake and is much less discussed than protein. I would hold that lightly until someone with a larger…
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A single out-of-range value on an otherwise normal panel Replied, post #59 · Clinical › Bloodwork · 14 Jun 2026 · 14 likes Good question, well framed, and I would like to see it answered properly.
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Injecting into an area that has become firm: why not to Replied, post #61 · Practice › Administration · 13 Jun 2026 · 32 likes A site rotation scheme that actually works: abdomen, outer thigh, back of arm, outer hip. Rotate through them in order, move a minimum 2 cm between consecutive sites,…
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Mass error in ppm: the arithmetic and the caveat — a second dataset Replied, post #8 · marked as the solution · Analytics › Mass spectrometry · 12 Jun 2026 · 20 likes Calibration matters: a high-resolution instrument out of calibration can report mass with ppm error large enough to be uninformative. Check when the instrument was last…
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A 5 mg vial and a 0.25 mg dose: the arithmetic in full Replied, post #79 · Practice › Reconstitution · 11 Jun 2026 · 13 likes Picking up post #76: that is the part I would want checked first. Preservative effectiveness is tested against a defined microbial challenge under defined conditions.…
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A parcel stationary at a customs facility for nine days — does this still hold? Replied, post #25 · Sourcing › Logistics · 5 Jun 2026 · 10 likes Coming back to post #22, because the follow-up matters more than the original answer. Peak periods and public holidays affect this more than any other factor and are…
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Second pass at: What a 2 ppm match establishes, and what it does not Replied, post #23 · Analytics › Mass spectrometry · 4 Jun 2026 · 0 likes Noted, and thank you for writing it out rather than summarising it.