j.ivaturi

TL2 · Uppsala

Contributes reviews on supplier material. Based in Uppsala.

Joined 30 April 2025 · last posted 2d

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Tracking a shortage from primary sources rather than rumour Replied, post #125 · Access › Shortages · 26 Jul 2026 · 1 like Planning around a known shortage window is easier than reacting to one, and the notices give advance warning more often than people expect. One more caveat and then I…
Angle of injection and whether 90 degrees is always right — the long version Replied, post #54 · Practice › Administration · 24 Jul 2026 · 3 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…
Reflectance and photometric devices: precision in practice — a second dataset Replied, post #80 · Analytics › Home & field testing · 24 Jul 2026 · 6 likes On post #76 — agreed on the reasoning, with one qualification. If you are new and reading this thread for the answer to Reflectance and photometric devices: the answer…
Spreadsheets: an appreciation — what changed since Replied, post #101 · Lounge › Off topic · 15 Jul 2026 · 0 likes The failure mode on Spreadsheets is boring rather than dramatic. It is almost always the step everyone assumes was done correctly because it is too simple to get wrong.
How much context is too much context in a first post? Replied, post #63 · Start Here › How to Ask · 9 Jul 2026 · 28 likes Units. Everything needs units. This is why we ask every single time. I have seen the same arithmetic done three different ways depending on whether the person was…
Request: tag synonyms surfaced in search Replied, post #11 · Meta › Feature requests · 4 Jul 2026 · 0 likes Request from the analytics side: allow a table in a post to be marked as data rather than layout, so it can be copied without the formatting. Half the tables here are…
Journal club: SUSTAIN 6 and its retinopathy signal Replied, post #5 · Evidence › Journal club · 28 Jun 2026 · 0 likes Sensible. I would want the same detail before I acted on it either.
Carryover and the ghost peak from last week's standard — what changed since Replied, post #66 · Analytics › HPLC & UHPLC · 24 Jun 2026 · 0 likes System suitability is not paperwork. If the replicate injections failed, the run did not happen — the numbers from it are uninterpretable rather than approximate.
Second pass at: Absence of evidence and evidence of absence Replied, post #24 · Research Methods › Statistics · 17 Jun 2026 · 0 likes Absence of evidence came up in a thread eighteen months ago and was answered well. I cannot find it, which is itself the problem, so here is the reconstruction.
Coming back to: Specificity, linearity, accuracy, precision, range, robustness — with… Replied, post #55 · Analytics › Method validation · 16 Jun 2026 · 9 likes On post #51 — agreed on the reasoning, with one qualification. Robustness testing deliberately varies the parameters most likely to drift — organic percentage, pH,…
The anatomy of a question that gets answered within an hour Replied, post #77 · Start Here › How to Ask · 14 Jun 2026 · 18 likes This follows post #74 rather than contradicting it. If the answer you got does not fit your case, say which part does not fit rather than restating the question.…
Official shortage notices and what they authorise Replied, post #102 · Access › Shortages · 12 Jun 2026 · 1 like Manufacturer allocation decisions during a shortage are commercial and are rarely explained, which is frustrating and is not evidence of anything. The claim is narrower…